Method for controlling aerosol-generating device and aerosol-generating device

Abstract

The invention discloses a control method of an aerosol generating device and the aerosol generating device. The control method of the aerosol generating device comprises the following steps: acquiring a corresponding relation between heating power and output voltage of a plasma heating body; judging the heating stage of the plasma heating body; when the plasma heating body is in the first heating stage, first target output voltage of the plasma heating body is determined according to first target heating power of the first heating stage and the corresponding relation; when the plasma heating body is in a second heating stage, second target output voltage of the plasma heating body is adjusted and controlled through PID based on second target heating power of the second heating stage; wherein the first target heating power is greater than or equal to the second target heating power. Therefore, in the arcing stage, the output voltage can quickly reach the breakdown voltage, and after arcing, continuous discharge can be realized, so that the risk that the insulating material is broken down is reduced, and the reliability of the plasma heating body is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aerosol generation, and in particular to a control method of an aerosol generating device and the aerosol generating device. BACKGROUND

[0002] Inside the plasma heating body, in order to make the plasma only generated in the specified discharge gap, an insulating material needs to be placed between the high-voltage positive electrode and the negative electrode to define the discharge position. The voltage loaded on the discharge gap will be loaded on the insulating material at the same time. In the arc starting stage, if the power output voltage can quickly rise to the breakdown voltage and stabilize at the discharge voltage, the discharge channel can be quickly established in the electrode gap. However, the current power output voltage rises slowly and cannot quickly reach the breakdown voltage. The insulating material inside the heating body is subjected to a strong electric field for a long time, and the risk of breakdown of the insulating material is greatly increased. SUMMARY

[0003] The present application provides a control method of an aerosol generating device and the aerosol generating device to solve at least one of the above technical problems.

[0004] The control method of the aerosol generating device of the present application embodiment, the aerosol generating device comprising a plasma heating body, the control method comprising:

[0005] obtaining a corresponding relationship between a heating power and an output voltage of the plasma heating body;

[0006] judging a heating stage in which the plasma heating body is located;

[0007] when the plasma heating body is in a first heating stage, determining a first target output voltage of the plasma heating body according to a first target heating power of the first heating stage and the corresponding relationship;

[0008] when the plasma heating body is in a second heating stage, adopting PID adjustment control on a second target output voltage of the plasma heating body based on a second target heating power of the second heating stage;

[0009] wherein the first target heating power is greater than or equal to the second target heating power.

[0010] In some embodiments, the control method further comprises:

[0011] updating the corresponding relationship according to the second target heating power and the second target output voltage, and returning to the step of judging the heating stage in which the plasma heating body is located.

[0012] In some embodiments, the first heating stage comprises a first sub-heating stage, the first sub-heating stage being an arc starting stage in the heating cycle of the plasma heating body, and the determining the first target output voltage of the plasma heating body according to the first target heating power of the first heating stage and the correspondence relationship when the plasma heating body is in the first heating stage comprises:

[0013] determining a first sub-target output voltage of the plasma heating body according to a first sub-target heating power of the first sub-heating stage and the correspondence relationship when the plasma heating body is in the first sub-heating stage;

[0014] wherein the first sub-target heating power is greater than the second target heating power.

[0015] In some embodiments, the first heating stage comprises a second sub-heating stage, the second sub-heating stage being a pre-determined time period before the constant power maintaining stage in the heating cycle of the plasma heating body, and the determining the first target output voltage of the plasma heating body according to the first target heating power of the first heating stage and the correspondence relationship when the plasma heating body is in the first heating stage comprises:

[0016] determining a second sub-target output voltage of the plasma heating body according to a second sub-target heating power of the second sub-heating stage and the correspondence relationship when the plasma heating body is in the second sub-heating stage;

[0017] wherein the second sub-target heating power is equal to the second target heating power.

[0018] In some embodiments, the second heating stage is a pre-determined time period after the constant power maintaining stage in the heating cycle of the plasma heating body, and the adopting the PID regulation to control the second target output voltage of the plasma heating body based on the second target heating power of the second heating stage when the plasma heating body is in the second heating stage comprises:

[0019] acquiring an actual output power of the second sub-heating stage;

[0020] calculating a power error between the actual output power and the second target heating power;

[0021] adopting the PID regulation to control the second target output voltage according to the power error.

[0022] In some embodiments, the plasma heating body comprises a control module and a heating body, the control module being configured to adjust an actual output voltage to a target output voltage according to a target heating power, so as to drive the heating body to heat.

[0023] In some embodiments, the control module comprises a first power unit, a second power unit, a transformer, a PWM control unit and a master control unit, the actual output voltage and the target output voltage are actual output voltage and target output voltage of an input side of the transformer;

[0024] The first power unit is configured to output a power voltage to the second power unit;

[0025] The second power unit is configured to convert the power voltage in direct current into the actual output voltage in alternating current;

[0026] The transformer is configured to step up the actual output voltage to a driving voltage, the driving voltage being configured to drive the heat generator to heat;

[0027] The master control unit is configured to control the PWM control unit according to the target heating power, and adjust the power voltage by duty cycle to adjust the actual output voltage to the target output voltage.

[0028] In some embodiments, the heat generator comprises:

[0029] a heating member, the heating member being internally formed with a heating cavity; and

[0030] at least one set of electrode assemblies, each set of the electrode assemblies comprising a first electrode and a second electrode, the first electrode and the second electrode both extending into the heating cavity, and an arc being controllably formed between the first electrode and the second electrode in the heating cavity to generate plasma;

[0031] wherein the heating member is configured to form a receiving site for receiving an aerosol generating substrate.

[0032] In some embodiments, the heat generator comprises:

[0033] an inner tube;

[0034] an outer tube, the outer tube being sleeved on the inner tube;

[0035] a first electrode, the first electrode being at least partially disposed in the inner tube;

[0036] a second electrode, at least a portion of the second electrode being disposed at one end of the inner tube and being oppositely and spacedly disposed relative to the first electrode, the first electrode and the second electrode being configured to generate plasma between the second electrode and the first electrode when the first electrode and the second electrode are energized; and

[0037] A conductive member connects the second electrode and is used to electrically connect with an external power source. The conductive member extends from one end of the inner tube to the other end of the inner tube in the axial direction of the inner tube. The inner tube and the conductive member correspond to each other, and the tube segment of the inner tube partially faces the outer tube.

[0038] The aerosol generating device of the embodiments of the present application comprises one or more processors and a memory, the memory stores a computer program, and the computer program is executed by the processor to implement the control method of the aerosol generating device of any of the above embodiments.

[0039] In the control method of the aerosol generating device and the aerosol generating device of the embodiments of the present application, in the first heating stage, the first target output voltage of the plasma heating element is determined by looking up the corresponding relationship according to the first target heating power, and in the second heating stage, the second target output voltage of the plasma heating element is controlled by PID adjustment according to the second target heating power. In this way, in the arc starting stage, the output voltage can quickly reach the breakdown voltage, and after the arc is started, continuous discharge can be realized, the risk of insulation material being broken down is reduced, and the reliability of the plasma heating element is improved.

[0040] Additional aspects and advantages of the embodiments of the present application will be in part apparent and in part pointed out hereinafter in the description of the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0041] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the description of the embodiments, taken in conjunction with the following drawings in which:

[0042] Figure 1 is a flowchart of the control method of the aerosol generating device of some embodiments of the present application;

[0043] Figure 2 is a comparison diagram of the control method of the aerosol generating device of some embodiments of the present application and the control method of the related art, respectively controlling the change of the heating power of the plasma heating element with the heating time;

[0044] Figure 3 is a flowchart of the control method of the aerosol generating device of some embodiments of the present application;

[0045] Figure 4 is a flowchart of the control method of the aerosol generating device of some embodiments of the present application;

[0046] Figure 5 is a flowchart of the control method of the aerosol generating device of some embodiments of the present application;

[0047] Figure 6 is a flowchart of a control method of an aerosol generating device according to certain embodiments of the present disclosure;

[0048] Figure 7 is a graph showing a change in heating power of a control method of an aerosol generating device according to certain embodiments of the present disclosure;

[0049] Figure 8 is a structural diagram of a plasma heating element according to certain embodiments of the present disclosure;

[0050] Figure 9 is a structural diagram of a heating element according to certain embodiments of the present disclosure;

[0051] Figure 10 is another structural diagram of a heating element according to certain embodiments of the present disclosure;

[0052] Figure 11 is a structural diagram of a heating element according to certain embodiments of the present disclosure;

[0053] Figure 12 is a cross-sectional view of a heating element of Figure 1 along the A-A direction;

[0054] Figure 13 is an exploded structural diagram of a heating element according to certain embodiments of the present disclosure; Figure 1

[0055] Figure 14 is a structural diagram of an aerosol generating device according to certain embodiments of the present disclosure;

[0056] Figure 15 is a module diagram of a control device of an aerosol generating device according to certain embodiments of the present disclosure;

[0057] Figure 16 is a module diagram of a control device of an aerosol generating device according to certain embodiments of the present disclosure;

[0058] Figure 17 is a module diagram of an aerosol generating device according to certain embodiments of the present disclosure;

[0059] Figure 18 is a connection state diagram of a computer readable storage medium and a processor according to certain embodiments of the present disclosure.

[0060] BRIEF DESCRIPTION OF DRAWINGS

[0061] ​The plasma heating body 100, the control module 10, the first power unit 11, the second power unit 12, the transformer 13, the PWM control unit 14, the master control unit 15, the heating body 20, the heating piece 21, the heating cavity 211, the electrode assembly 22, the first electrode 221, the second electrode 222, the accommodating site 23, the inner tube 24, the second end surface 241, the outer tube 25, the tapered end 251, the open end 252, the first electrode 26, the second electrode 27, the conductive piece 28, the first end 281, the second end 282, the discharge area 29, the power supply 101, the substrate 102, the central axis 103, the control device 200 of the aerosol generating device, the acquisition module 210, the judgment module 220, the first control module 230, the second control module 240, the update module 250, the aerosol generating device 300, the processor 310, the memory 320, the computer readable storage medium 400, the computer program 410, and the processor 420. DETAILED DESCRIPTION

[0062] The embodiments of the present application are further described below with reference to the drawings. The same or similar reference signs are used throughout the drawings to represent the same or similar elements or elements having the same or similar functions. In addition, the embodiments of the present application described below with reference to the drawings are exemplary and are only used to explain the embodiments of the present application and cannot be understood as a limitation of the present application.

[0063] Please refer to Figure 1 , Figure 8 and Figure 17 , the embodiments of the present application provide a control method of an aerosol generating device 300. The aerosol generating device 300 includes a plasma heating body 100. The control method of the aerosol generating device 300 includes:

[0064] 010: acquiring a corresponding relationship between a heating power and an output voltage of the plasma heating body 100;

[0065] 020: judging a heating stage in which the plasma heating body 100 is located;

[0066] 030: when the plasma heating body 100 is in a first heating stage, determining a first target output voltage of the plasma heating body 100 according to a first target heating power of the first heating stage and the corresponding relationship;

[0067] 040: when the plasma heating body 100 is in a second heating stage, adopting PID regulation to control a second target output voltage of the plasma heating body 100 based on a second target heating power of the second heating stage;

[0068] wherein the first target heating power is greater than or equal to the second target heating power.

[0069] In the control method of the aerosol generating device 300 of the embodiments, in the first heating stage, the first target output voltage of the plasma heating element 100 is determined according to the first target heating power through the correspondence between the heating power and the output voltage of the plasma heating element 100, and in the second heating stage, the second target output voltage of the plasma heating element 100 is controlled through PID adjustment according to the second target heating power. In this way, in the arc starting stage, the output voltage can quickly reach the breakdown voltage, and after the arc is started, continuous discharge can be achieved, reducing the risk of breakdown of the insulating material and improving the reliability of the plasma heating element 100.

[0070] Specifically, the correspondence between the heating power and the output voltage of the plasma heating element 100 can be predicted according to the internal structure of the plasma heating element 100. The correspondence can be in the form of a data table (as shown in Table 1 below), or in the form of a linear function curve, or in any other form, which is not limited herein.

[0071] Table 1: Correspondence table between heating power and output voltage of plasma heating element 100

[0072] Heating power (10 mW) Output voltage (mV) 1 0 0 2 3000 10000 3 3500 11000 4 4000 12000 5 4500 13000 6 5000 14000 7 5500 15000 8 6000 16000 9 6500 17000 10 7000 18000

[0073] After obtaining the correspondence between the heating power and the output voltage of the plasma heating element 100, the heating stage of the plasma heating element 100 is determined. Specifically, the heating period and the heating time of each heating stage in a heating period can be set in advance. For example, a heating period of 3s is set, in which 0-1s is the heating stage and 1s-3s is the stop heating stage. The heating stage includes the first heating stage and the second heating stage, 0-210ms is the first heating stage, and 210ms-1s is the second heating stage. The heating stage of the current plasma heating element 100 can be determined according to the time period in the heating period at the current time.

[0074] In one heating period of the plasma heating element 100, the arc starting stage, the constant power stable stage and the arc stopping stage are included.

[0075] In one example, the heating stage corresponds to the arc starting stage and the constant power stable stage of the plasma heating element 100, and the stop heating stage corresponds to the arc stopping stage of the plasma heating element. Further, the first heating stage can include the arc starting stage and the first predetermined period of the constant power stable stage, and the second heating stage can include the second predetermined period of the constant power stable stage.

[0076] Based on the internal structure of the plasma heating element 100, the target heating power of the plasma heating element 100 in each heating stage can be preset. The target heating power in the first heating stage is the first target heating power; the target heating power in the second heating stage is the second target heating power. It should be noted that the output voltage in the arc initiation stage needs to reach the breakdown voltage. Therefore, the target heating power in the arc initiation stage is greater than the target heating power in the constant power stabilization stage, thus the first target heating power is greater than or equal to the second target heating power.

[0077] When the plasma heating element 100 is in the first heating stage, the correspondence between the heating power and output voltage of the plasma heating element 100 is found, and the first target output voltage of the plasma heating element 100 is determined according to the first target heating power and the correspondence. For example, when the first target power of the first heating stage is 70W, according to Table 1 above, the output voltage corresponding to 70W is 18V, and the first target output voltage is 18V.

[0078] When the plasma heating element 100 is in the second heating stage, there is no need to look up the correspondence between the heating power and output voltage of the plasma heating element 100. Instead, based on the second target heating power, the second target output voltage of the plasma heating element 100 is controlled by proportional-integral-differential (PID) regulation. PID regulation refers to combining the proportional, integral, and derivative signals of the power error between the second target heating power and the actual output power into a control quantity to control the second target output voltage.

[0079] It is understandable that during the arc initiation phase of the plasma heating element 100, if the output voltage can quickly rise to the breakdown voltage and stabilize at the discharge voltage, a discharge channel can be quickly established within the electrode gap of the plasma heating element 100. Once the discharge channel is established, the output voltage will drop significantly due to the increased load current, thereby significantly reducing the electric field strength that the insulating material inside the plasma heating element 100 needs to withstand. If the output voltage rises slowly and cannot quickly reach the breakdown voltage, the insulating material inside the plasma heating element 100 will be subjected to a strong electric field for a long time, greatly increasing the risk of the insulating material breaking down.

[0080] In related technologies, such as Figure 2 In the previous curve, the output voltage of the plasma heating element was controlled by PID regulation during the heating stage. After arc ignition, the power approached 0 for a period of time, and the discharge was discontinuous. It took about 200ms to reach the target heating power of the constant power stable stage. During these 200ms, the insulating material was easily broken down.

[0081] In this embodiment, during the first heating stage, the first target output voltage of the plasma heating element 100 is determined by looking up a corresponding relationship based on the first target heating power. During the second heating stage, the second target output voltage of the plasma heating element 100 is controlled by PID regulation based on the second target heating power. Figure 2 The improved curve allows the plasma heating element 100 to reach the target heating power during the arc initiation phase in just 10ms, meaning the output voltage reaches the breakdown voltage. Furthermore, after arc initiation, the actual heating power quickly stabilizes at the target heating power in the constant power stability phase, ensuring continuous discharge without approaching zero. Thus, during the arc initiation phase, the output voltage can quickly reach the breakdown voltage, and after arc initiation, continuous discharge is possible, reducing the risk of insulation material breakdown and improving the reliability of the plasma heating element 100.

[0082] Please see Figure 3 In some embodiments, the first heating stage includes a first sub-heating stage, which is the arc-starting stage in the heating cycle of the plasma heating element 100. When the plasma heating element 100 is in the first heating stage, the first target output voltage (i.e., 030) of the plasma heating element 100 is determined according to the first target heating power and corresponding relationship of the first heating stage, including:

[0083] 031: When the plasma heating element 100 is in the first sub-heating stage, the first sub-target output voltage of the plasma heating element 100 is determined according to the first sub-target heating power and corresponding relationship of the first sub-heating stage;

[0084] The heating power of the first sub-target is greater than that of the second target.

[0085] Specifically, the first heating stage includes a first sub-heating stage, which corresponds to the arc-starting stage in the heating cycle of the plasma heating element 100. Based on the internal structure of the plasma heating element 100, the target heating power of the plasma heating element 100 in the first sub-heating stage can be preset as the first sub-target heating power. When the plasma heating element 100 is in the first sub-heating stage, the correspondence between the heating power and output voltage of the plasma heating element 100 is found, and the first sub-target output voltage of the plasma heating element 100 is determined based on the first sub-target heating power and the correspondence.

[0086] For example, in the first heating stage of 0-210ms, 0-10ms can be set as the first heating sub-stage. When the plasma heating element 100 is in the first sub-heating stage, if the first sub-target power of the first sub-heating stage is 70W, according to Table 1 above, the output voltage corresponding to 70W is 18V, and the first sub-target data voltage is 18V.

[0087] It can be understood that the output voltage of the plasma heating body 100 needs to be rapidly raised to the breakdown voltage in the starting arc stage, the first sub-target output voltage of the starting arc stage should be greater than the output voltage of the constant power stable stage, and the target heating power of the starting arc stage is greater than the target heating power of the constant power stable stage, that is, the first sub-target heating power is greater than the second target heating power.

[0088] Please refer to Figure 4 In some embodiments, the first heating stage includes a second sub-heating stage, and the second sub-heating stage is a predetermined time period before the constant power maintaining stage in the heating cycle of the plasma heating body 100. When the plasma heating body 100 is in the first heating stage, the first target output voltage of the plasma heating body 100 is determined according to the first target heating power of the first heating stage and the corresponding relationship (i.e., 030), including:

[0089] 032: When the plasma heating body 100 is in the second sub-heating stage, the second sub-target output voltage of the plasma heating body 100 is determined according to the second sub-target heating power of the second sub-heating stage and the corresponding relationship.

[0090] Wherein, the second sub-target heating power is equal to the second target heating power.

[0091] Specifically, the first heating stage includes a second sub-heating stage, and the second sub-heating stage corresponds to a predetermined time period before the constant power maintaining stage in the heating cycle of the plasma heating body 100. According to the internal structure of the plasma heating body 100, the target heating power of the plasma heating body 100 in the second sub-heating stage can be preset as the second sub-target heating power. When it is determined that the plasma heating body 100 is in the second sub-heating stage, the corresponding relationship between the heating power and the output voltage of the plasma heating body 100 is searched, and the second sub-target output voltage of the plasma heating body 100 is determined according to the second sub-target heating power and the corresponding relationship.

[0092] For example, in the first heating stage of 0-210ms, 10ms-210ms can be set as the second heating sub-stage. When the plasma heating body 100 is in the second sub-heating stage, if the second sub-target power of the second sub-heating stage is 30W, according to the above table 1, the output voltage corresponding to 30W is 10V, and the second sub-target data voltage is 10V.

[0093] It can be understood that the second sub-heating stage and the second heating stage are both constant power stable stages of the plasma heating body 100, and the second sub-target heating power is equal to the second target heating power.

[0094] Please refer to Figure 5In some embodiments, the second heating stage is a predetermined time period after the constant power maintaining stage in the heating cycle of the plasma heating body 100. When the plasma heating body 100 is in the second heating stage, the second target output voltage of the plasma heating body 100 is controlled based on the second target heating power of the second heating stage by PID regulation, including:

[0095] 041: obtaining the actual output power of the second sub-heating stage;

[0096] 042: calculating the power error between the actual output power and the second target heating power;

[0097] 043: controlling the second target output voltage according to the power error by PID regulation.

[0098] Specifically, the second heating stage corresponds to a predetermined time period after the constant power maintaining stage in the heating cycle of the plasma heating body 100. When the plasma heating body 100 is in the second heating stage, the actual output power of the second sub-heating stage is obtained, which can be calculated by collecting the actual output voltage and current. The power error between the actual output power and the second target heating power is calculated, and the proportional, integral and differential signals of the power error are integrated into a control quantity to control the second target output voltage, so that the actual output power of the second heating stage is stabilized at the second target heating power.

[0099] For example, if the second target power of the second heating stage is 30W, the actual output power of the second sub-heating stage is obtained as 25W, and the power error between the actual output power and the second target heating power is calculated as 5W, the second target output voltage is controlled according to the power error 5W by PID regulation, so that the actual output power of the second heating stage is stabilized at the second target heating power.

[0100] Please refer to Figure 6 In some embodiments, the control method further comprises:

[0101] 050: updating the corresponding relationship according to the second target heating power and the second target output voltage, and returning to the step of judging the heating stage in which the plasma heating body 100 is located.

[0102] As described above, the correspondence between the heating power and the output voltage of the plasma heating body 100 is predicted according to the internal structure of the plasma heating body 100. In the actual heating process of the plasma heating body 100, or in the long-term use of the plasma heating body 100, the above-mentioned correspondence may deviate from the correspondence between the actual output power and the actual output voltage of the plasma heating body 100 due to aging and the like. In addition, when the plasma heating body 100 is mass-produced, differences may exist between the internal structures of the plurality of plasma heating bodies 100 due to production errors, and the correspondence may also deviate. Therefore, the correspondence can be updated during the heating process of the plasma heating body 100.

[0103] Specifically, after the second target output voltage of the plasma heating body 100 is adjusted and controlled by PID based on the second target heating power of the second heating stage (i.e. 040), the correspondence between the heating power and the output voltage of the plasma heating body 100 can also be updated according to the second target heating power and the second target output voltage, and return to the step of judging the heating stage in which the plasma heating body 100 is located. The updated correspondence can be in the form of a data table (as shown in Table 2 below), or in the form of a linear function curve, or in any other form, which is not limited here.

[0104] For example, if the second target power of the second heating stage is 30W (30000mW), according to the above Table 1, the second target output voltage is 1000mV. The actual output power of the second sub-heating stage is obtained as 25W, and the power error between the actual output power and the second target heating power is calculated as 5W. The second target output voltage is adjusted and controlled by PID according to the power error 5W, and the actual output power is stabilized at 9012mV after adjustment. Therefore, the output voltage corresponding to 30W in Table 1 is updated from 10000mV to 9012mV, and Table 2 can be obtained after the different powers in Table 1 are called and updated.

[0105] Table 2: Correspondence between heating power and output voltage of plasma heating body 100

[0106] Heating power (10 mW) Output voltage (mV) 1 0 0 2 3000 9012 3 3500 10197 4 4000 11271 5 4500 12419 6 5000 13367 7 5500 14519 8 6000 15483 9 6500 16452 10 7000 17445

[0107] After obtaining the updated correspondence, in the next heating cycle, the first target output voltage of the plasma heating body 100 is determined according to the first target power of the first heating stage and the updated correspondence. In this way, the correspondence between the heating power and the output voltage of the plasma heating body 100 can be corrected based on PID adjustment and self-learning, and the reliability of the plasma heating body 100 can be maintained in the long-term use of the plasma heating body 100.

[0108] like Figure 7 As shown in the figure, the horizontal axis represents time, and the vertical axis represents power. It includes waveforms A and B, with the two waves representing two consecutive heating cycles. For waveform A, there is a discrepancy in the correspondence; after the arc initiation phase, it takes a relatively long time to reach the target heating power. Self-learning correction is performed during the PID control of waveform A, so that in the next heating cycle, i.e., waveform B, the target heating power can be reached quickly after the arc initiation phase and maintained at a constant power.

[0109] In related technologies, during mass production, corrections are made by manually calculating deviations in the corresponding relationships. This correction process is cumbersome and incurres high labor and time costs. However, in this application's embodiment, correction is performed through PID control self-learning. This allows for quick and efficient correction, reducing labor and time costs during mass production.

[0110] Please see Figure 8 In some embodiments, the plasma heating element 100 includes a control module 10 and a heating element 20. The control module 10 is used to adjust the actual output voltage to the target output voltage according to the target heating power, so as to drive the heating element 20 to perform heating.

[0111] Specifically, the heating element 20 may include a first electrode and a second electrode arranged opposite to each other. When the first electrode and the second electrode are energized, plasma is generated between the two electrodes. Plasma is a state of matter containing a large number of charged particles and neutral atoms and molecules, and maintaining overall electrical neutrality. Plasma can be generated by the ionization of gas under the action of an electric field. The control module 10 is connected to the heating element 20 to adjust the actual output voltage to the target output voltage according to the target heating power, thereby driving the heating element 20 to generate plasma for heating.

[0112] Please see Figure 8 In some embodiments, the control module 10 includes a first power unit 11, a second power unit 12, a transformer 13, a PWM control unit 14, and a main control unit 15. The actual output voltage and the target output voltage are the actual output voltage and the target output voltage on the input side of the transformer 13, respectively. The first power unit 11 outputs a power voltage to the second power unit 12. The second power unit 12 converts the DC power voltage into an AC actual output voltage. The transformer 13 boosts the actual output voltage to a drive voltage, which drives the heating element 20 for heating. The main control unit 15 controls the PWM control unit 14 according to the target heating power, adjusting the power voltage using a duty cycle to adjust the actual output voltage to the target output voltage.

[0113] Specifically, the first power unit 11 can adopt a boost (BOOST) circuit or a buck-boost (BUCKBOOST) circuit. The first power unit 11 is connected with the second power unit 12 to output a power voltage to the second power unit 12, and the output power voltage is a direct current voltage. The second power unit 12 can adopt an open-loop half-bridge or full-bridge circuit, and the second power unit 12 converts the direct current power voltage into an alternating current actual output voltage through high-frequency inversion conversion.

[0114] The transformer 13 is connected with the second power unit 12 at the input side and connected with the heat-generating body 20 at the output side. The transformer 13 can boost the actual output voltage of the second power unit 12 to a driving voltage to drive the heat-generating body 20 to heat. In an example, the actual output voltage is 8V-20V, the driving voltage is about 8000V in the arc starting stage, and the driving voltage is about 2000-3000V in the constant power stable stage. The driving voltage required by the heat-generating body 20 is related to the electrode gap of the heat-generating body 20, the larger the electrode gap, the higher the required breakdown voltage, and the higher the required driving voltage. The driving voltage output by the transformer 13 is related to the actual output voltage and the turns ratio of the transformer 13.

[0115] The main control unit 15 is connected with the PWM control unit 14, and the PWM control unit 14 is connected with the first power unit 11. The main control unit 15 can control the PWM control unit 14 according to the target heating power, and adjust the power voltage by duty cycle. When the first power unit 11 adopts the BOOST circuit, the duty cycle adjustment formula is as follows:

[0116]

[0117] Wherein, V out1 is the power voltage output by the BOOST circuit, V in1 is the input voltage of the BOOST circuit. D is the duty cycle.

[0118] When the first power unit 11 adopts the BUCKBOOST circuit, the duty cycle adjustment formula is as follows:

[0119]

[0120] Wherein, V out2 is the power voltage output by the BUCKBOOST circuit, V in2 is the input voltage of the BUCKBOOST circuit. D is the duty cycle.

[0121] The main control unit 15 stores a corresponding relationship between the heating power of the plasma heating body 100 and the output voltage. In the first heating stage, the main control unit 15 determines the first target output voltage of the plasma heating body 100 according to the first target heating power of the first heating stage and the corresponding relationship, and adjusts the duty cycle by controlling the PWM control unit 14 to adjust the power voltage output by the first power unit 11, so that the actual output voltage at the input side of the transformer 13 is adjusted to the first target output voltage.

[0122] In the second heating stage, the main control unit 15 calculates the power error between the actual output power and the second target heating power based on the second target heating power of the second heating stage, synthesizes the proportional, integral and differential signals of the power error into a control quantity to control the PWM control unit 14 to adjust the duty cycle, so as to adjust the power voltage output by the first power unit 11, and then the actual output voltage at the input side of the transformer 13 is adjusted to the second target output voltage.

[0123] Please refer to Figure 9 In some embodiments, the heating body 20 includes a heating element 21 and at least one set of electrode assemblies 22, and the heating element 21 forms a heating cavity 211 inside. Each set of electrode assemblies 22 includes a first electrode 221 and a second electrode 222, both of which extend into the heating cavity 211, and an arc can be controlled to form between the first electrode 221 and the second electrode 222 in the heating cavity 211 to generate plasma. The heating element 21 can form a holding position 23 for holding an aerosol generating substrate.

[0124] The heating body 20 heats the aerosol generating substrate by plasma heating. The high energy density of plasma heating can achieve instant and rapid heating and atomization, effectively shorten the preheating time, prevent the preheating time from being too long to cause burning, and improve the taste of atomization.

[0125] The heating body 20 comprises a heating piece 21 and at least one set of electrode assemblies, the heating piece 21 is internally formed with a heating cavity 211, each set of electrode assemblies comprises a first electrode 221 and a second electrode 222, the first electrode 221 and the second electrode 222 both extend into the heating cavity 211, and an arc can be controlled to be formed between the first electrode 221 and the second electrode 222 in the heating cavity 211 to generate plasma. That is, the first electrode 221 and the second electrode 222 both extend into the heating cavity 211 of the heating piece 21, an arc is generated by breakdown between the first electrode 221 and the second electrode 222 under alternating current or direct current, and then plasma is formed by ionization of gas in the heating cavity 211, and the plasma makes the heating cavity 211 heat. In addition, the heating piece 21 can form a containing position 23 for carrying an aerosol generating substrate, and the containing position 23 can conduct heat with the heating cavity 211. After the heating cavity 211 internally heats under the action of the plasma, heat can be transferred to the containing position 23, and then the aerosol generating substrate arranged on the containing position 23 is heated.

[0126] In this way, the aerosol generating substrate is rapidly heated by the heat generated by the plasma in the heating cavity 211, the high energy density characteristics of the plasma heating are utilized, the preheating waiting time is shortened, the user is facilitated, and the aerosol generating substrate is prevented from being burnt by the long preheating time, and the atomization taste is improved. At the same time, the metal parts such as electrodes do not need to be directly in contact with the aerosol generating substrate during the heating process, and the aerosol generating substrate after atomization can be prevented from being doped with metal substances, and the atomization taste is further improved.

[0127] In some embodiments, the first electrode 221 and the second electrode 222 in each set of electrode assemblies are both made of any one of bismuth alloy, carbon fiber and copper alloy, the diameter of the first electrode 221 and the second electrode 222 ranges from 0.4 mm to 1.0 mm, and the spacing between the first electrode 221 and the second electrode 222 is 5-10 mm.

[0128] Please refer to Figure 9 Optionally, the number of electrode assemblies is one set; please refer to Figure 10 Further optionally, the number of electrode assemblies is multiple sets, the multiple sets of electrode assemblies can discharge in parallel at the same time, or the multiple sets of electrode assemblies discharge in sequence according to an order. In addition, on the heating piece 21, all the first electrodes 221 and all the second electrodes 222 are symmetrically distributed with respect to a pair of symmetry reference lines to form a uniform temperature field in the heating cavity 211.

[0129] Please refer to Figures 11 to 14In some embodiments, the heating element 20 comprises an inner tube 24, an outer tube 25, a first electrode 26, a second electrode 27 and an electrically conductive member 28. The outer tube 25 is sleeved on the inner tube 24. The first electrode 26 is at least partially arranged in the inner tube 24. At least a portion of the second electrode 27 is arranged at one end of the inner tube 24 and is opposite and spaced apart from the first electrode 26. When the first electrode 26 and the second electrode 27 are electrified, plasma is generated between the second electrode 27 and the first electrode 26. The electrically conductive member 28 is connected to the second electrode 27 and is used to electrically connect to the external power source 101. The electrically conductive member 28 extends from one end of the inner tube 24 to the other end of the inner tube 24 along the axial direction of the inner tube 24. The portion of the inner tube 24 corresponding to the electrically conductive member 28 partially faces the outer tube 25.

[0130] It should be noted that the portion of the inner tube 24 corresponding to the electrically conductive member 28 can be the portion of the inner tube 24 between the two ends in the axial direction of the electrically conductive member 28. The axial length of the portion of the inner tube 24 corresponding to the electrically conductive member 28 and the electrically conductive member 28 can be substantially equal, and the two ends can be substantially aligned. In addition, it can also be understood that the electrically conductive member 28 is needed to electrically connect the second electrode 27 to the power source 101. However, the second electrode 27 and the electrically conductive member 28 are not necessarily two separate components. They can be made of the same material and can be integrally formed as a whole. The portion opposite to the first electrode 26 is used as an electrode, and the remaining portion is used for electrical connection. In this application, the second electrode 27 and the electrically conductive member 28 are described as two components, which cannot be regarded as a limitation on the whole and the parts. They are described in order to better illustrate and explain.

[0131] In the heating element 20 of the embodiments of the present application, the portion of the inner tube 24 corresponding to the electrically conductive member 28 partially faces the outer tube 25, which reduces the volume of the electrically conductive member 28, thereby reducing the heat capacity of the electrically conductive member 28, so that the electrically conductive member 28 stores less heat, and the heat generated by the heating element 20 can be more directly radiated to the aerosol-forming substrate 102 through the inner tube 24 and the outer tube 25, thereby improving the heat utilization rate and further improving the heating rate and heating efficiency of the aerosol-forming substrate 102.

[0132] It can be understood that the portion of the inner tube 24 corresponding to the electrically conductive member 28 partially faces the outer tube 25, that is, the portion of the inner tube 24 corresponding to the electrically conductive member 28 has a part of the outer wall surface facing the outer tube 25, and the part of the outer wall surface is not blocked by the electrically conductive member 28. In addition, the inner tube 24 has another part of the outer wall surface facing the outer tube 25 on the same portion, but the part of the outer wall surface is blocked by the electrically conductive member 28 and cannot directly face the outer tube.

[0133] Specifically, please refer to Figure 13The inner tube 24 can be a hollow tube with openings at both ends. The inner tube 24 can be cylindrical in shape and has a central axis 103. The axial length of the inner tube 24 is much greater than its radial length. The sides of the inner tube 24 surround the central axis 103 to form the wall of the inner tube 24 and the hollow space of the inner tube 24.

[0134] Please see Figure 12 At least a portion of the first electrode 26 is inserted from one end of the inner tube 24 into the hollow space at the center of the inner tube 24 along the axial direction of the inner tube 24. For example... Figure 12 As shown, the position where the first electrode 26 protrudes from the inner tube 24 is denoted as P. The second electrode 27 is disposed at the other end of the inner tube 24, and is opposite to the portion of the first electrode 26 inserted into the inner tube 24 through the hollow space of the inner tube 24.

[0135] The first electrode 26 is inserted into the inner tube 24 at a certain distance from the second electrode 27. For ease of explanation, in this application, the interval between the first electrode 26 and the second electrode 27 is referred to as the discharge region 29. The discharge region 29 can be enclosed by the inner tube 24 and is located in the hollow space of the inner tube 24.

[0136] Please continue reading. Figure 12 , combined Figure 14 As shown, the first electrode 26 can be connected to the power supply 101, conducting one pole of the high-voltage electricity; the second electrode 27 can be connected to the power supply 101 through the conductive element 28, conducting the other pole of the high-voltage electricity. With the first electrode 26 and the second electrode 27 conducting the high-voltage electricity, a plasma arc is generated in the discharge region 29 through high-voltage discharge. At the center of the discharge region 29, the highest temperature during plasma arc generation can reach over 2000℃, and the stable plasma temperature range is 1000℃~1600℃. The discharge region 29 can be sealed and filled with an electrically neutral gas, such as nitrogen or argon. Alternatively, the discharge region 29 can be connected to atmospheric pressure; in this case, the gas inside the discharge region 29 is air.

[0137] It should be noted that the first electrode 26 and the second electrode 27 can be connected to either direct current (DC) or alternating current (AC). When DC is applied to the first electrode 26 and the second electrode 27, plasma is formed using DC; when AC is applied to the first electrode 26 and the second electrode 27, plasma is formed using AC.

[0138] Please see Figure 11 and Figure 12The outer tube 25 is sleeved on the inner tube 24 to wrap at least a portion of the inner tube 24. The outer tube 25 can cover at least the discharge region 29 in the inner tube 24. The aerosol-forming substrate 102 is filled in the outer side of the outer tube 25. The outer surface of the outer tube 25 can be in direct contact with the aerosol-forming substrate 102. The heat generated by the plasma arc in the discharge region 29 can be transmitted to the outside of the outer tube 25 through the inner tube 24, the conductive member 28 and the outer tube 25 in the form of infrared radiation and heat conduction, so that the aerosol-forming substrate 102 absorbs the heat to form an aerosol.

[0139] The outer tube 25 can be a hollow tube with one end closed and the other end open. The closed end of the outer tube 25 can form a tapered end 251, and the open end is an open end 252. The open end 252 forms a circular ring-shaped cross section, and the cross-sectional area of the open end 252 can be greater than that of the tapered end 251.

[0140] The inner tube 24 wraps at least a portion of the first electrode 26, and the inner tube 24 includes one end of the second end surface 241 inserted into the outer tube 25 from the open end 252, so that the second electrode 27 arranged on the second end surface 241 abuts against the inner wall surface of the tapered end 251. The second end 282 is connected with the second electrode 27 and extends into the outer tube 25 with the inner tube 24, close to the tapered end 251. The first end 281 can extend out of the outer tube 25 from the open end 252.

[0141] In some embodiments, the outer tube 25 is made of at least one of quartz and ceramic, so that the outer tube 25 can provide insulation protection and can transmit the infrared radiation emitted by the discharge of the first electrode 26 and the second electrode 27 to the outside of the outer tube 25 to heat the aerosol-forming substrate 102.

[0142] In some embodiments, the wall thickness of the outer tube 25 ranges from 0.3mm to 0.5mm (including the end point value). The outer diameter of the outer tube 25 is D, preferably 2.0mm≤D≤3.0mm. For example, the wall thickness of the outer tube 25 can be 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, etc., and the outer diameter of the outer tube 25 can be 2.0mm, 2.1mm, 2.3mm, 2.6mm, 2.8mm, 3mm, etc. The outer tube 25 can be a quartz tube with an outer diameter of 2.0mm and a wall thickness of 0.3mm. For example, the outer tube 25 can be a quartz tube with an outer diameter of 3.0mm and a wall thickness of 0.4mm.

[0143] The conductive member 28 can be arranged on the inner tube 24 and extend along the axial direction of the inner tube 24 from one end of the inner tube 24 to the other end of the inner tube 24. The path of the conductive member 28 extending between the two ends of the inner tube 24 can be a straight line or a curve. The outer wall of the portion of the inner tube 24 wrapped by the outer tube 25 faces the inner wall of the outer tube 25.

[0144] The electrically conductive member 28 can be attached to the outer wall of the inner tube 24 between the outer wall of the inner tube 24 and the inner wall of the outer tube 25, covering part of the outer circumference of the inner tube 24. The part of the inner tube 24 covered by the electrically conductive member 28 cannot face or directly face the outer tube 25. In the area of the inner tube 24 blocked by the electrically conductive member 28, the heat of the plasma arc can be transmitted to the aerosol-forming substrate 102 through the inner tube 24, the electrically conductive member 28 and the outer tube 25. The infrared radiation energy of this part is much less than that of the part not covered by the electrically conductive member 28.

[0145] It can be understood that the electrically conductive member 28 can be a metal member arranged on the outer wall of the inner tube 24. In other embodiments, the electrically conductive member 28 can also be an electrically conductive film or an electrically conductive circuit coated on the outer wall of the inner tube 24, which can be understood in the same way as the above-mentioned scheme in terms of shape, thickness and arrangement position on the inner tube 24, etc.

[0146] The tube section of the inner tube 24 corresponding to the electrically conductive member 28 has at least part of the outer wall directly facing the inner wall of the outer tube 25, or in other words, the tube section of the inner tube 24 corresponding to the electrically conductive member 28 has part of the outer wall between which there is no other obstruction between the inner wall of the outer tube 25.

[0147] Referring to Figure 15 The control device 200 of the aerosol generating device 300 includes an obtaining module 210, a determining module 220, a first control module 230 and a second control module 240. The obtaining module 210 is configured to obtain a corresponding relationship between a heating power and an output voltage of the plasma heating element 100. The determining module 220 is configured to determine a heating stage in which the plasma heating element 100 is located. The first control module 230 is configured to determine a first target output voltage of the plasma heating element 100 according to a first target heating power of the first heating stage and the corresponding relationship when the plasma heating element 100 is in the first heating stage. The second control module 240 is configured to adjust and control a second target output voltage of the plasma heating element 100 based on a second target heating power of the second heating stage by PID control when the plasma heating element 100 is in the second heating stage. The first target heating power is greater than or equal to the second target heating power.

[0148] Referring to Figure 16 In some embodiments, the control device 200 further includes an updating module 250. The updating module 250 is configured to update the corresponding relationship according to the second target heating power and the second target output voltage, and return to the step of determining the heating stage in which the plasma heating element 100 is located.

[0149] In some embodiments, the first heating stage includes a first sub-heating stage, and the first sub-heating stage is an arc starting stage in the heating cycle of the plasma heating body 100. The first control module 230 is specifically configured to determine the first sub-target output voltage of the plasma heating body 100 according to the first sub-target heating power of the first sub-heating stage and the corresponding relationship when the plasma heating body 100 is in the first sub-heating stage. The first sub-target heating power is greater than the second target heating power.

[0150] In some embodiments, the first heating stage includes a second sub-heating stage, and the second sub-heating stage is a predetermined time period before the constant power maintaining stage in the heating cycle of the plasma heating body 100. The first control module 230 is specifically configured to determine the second sub-target output voltage of the plasma heating body 100 according to the second sub-target heating power of the second sub-heating stage and the corresponding relationship when the plasma heating body 100 is in the second sub-heating stage. The second sub-target heating power is equal to the second target heating power.

[0151] In some embodiments, the second heating stage is a predetermined time period after the constant power maintaining stage in the heating cycle of the plasma heating body 100. The second control module 240 is specifically configured to obtain the actual output power of the second sub-heating stage; calculate the power error between the actual output power and the second target heating power; and adjust the second target output voltage according to the power error by PID control.

[0152] In some embodiments, the plasma heating body 100 includes a control module 10 and a heating body 20. The control module 10 is configured to adjust the actual output voltage to the target output voltage according to the target heating power, so as to drive the heating body 20 to heat.

[0153] In some embodiments, the control module 10 includes a first power unit 11, a second power unit 12, a transformer 13, a PWM control unit 14, and a master control unit 15. The actual output voltage and the target output voltage are the actual output voltage and the target output voltage on the input side of the transformer 13. The first power unit 11 is configured to output a power voltage to the second power unit 12. The second power unit 12 is configured to convert the direct-current power voltage into the alternating-current actual output voltage. The transformer 13 is configured to step up the actual output voltage to a driving voltage, and the driving voltage is used to drive the heating body 20 to heat. The master control unit 15 is configured to control the PWM control unit 14 according to the target heating power, adjust the power voltage by duty cycle, and adjust the actual output voltage to the target output voltage.

[0154] It should be noted that the explanation and description of the control method of the aerosol generating device 300 in the foregoing embodiments are also applicable to the control device 200 of the aerosol generating device 300 in the embodiments of the present application, and will not be described here.

[0155] Referring to Figure 17 The embodiment of the present application also provides an aerosol generating device 300. The aerosol generating device 300 comprises one or more processors 310 and a memory 320, and the memory 320 stores a computer program. When the computer program is executed by the processor 310, the control method of the aerosol generating device 300 of any of the above-mentioned embodiments is realized.

[0156] For example, when the computer program is executed by the processor 310, the control method of the aerosol generating device 300 is realized as follows:

[0157] 010: obtaining a corresponding relationship between the heating power and the output voltage of the plasma heating element 100;

[0158] 020: judging the heating stage in which the plasma heating element 100 is located;

[0159] 030: when the plasma heating element 100 is in the first heating stage, determining the first target output voltage of the plasma heating element 100 according to the first target heating power of the first heating stage and the corresponding relationship;

[0160] 040: when the plasma heating element 100 is in the second heating stage, adopting PID adjustment control on the second target output voltage of the plasma heating element 100 based on the second target heating power of the second heating stage;

[0161] Wherein, the first target heating power is greater than or equal to the second target heating power.

[0162] For another example, when the computer program is executed by the processor 310, the control method of the aerosol generating device 300 is realized as follows:

[0163] 031: when the plasma heating element 100 is in the first sub-heating stage, determining the first sub-target output voltage of the plasma heating element 100 according to the first sub-target heating power of the first sub-heating stage and the corresponding relationship;

[0164] Wherein, the first sub-target heating power is greater than the second target heating power.

[0165] It should be pointed out that the above-mentioned embodiments of the control method of the aerosol generating device 300 and the control device 200 are also applicable to the aerosol generating device 300 of the present application, and will not be described here.

[0166] Referring to Figure 18 The computer readable storage medium 400 of the embodiment of the present application stores the computer program 410, and when the program is executed by the processor 420, the control method of the aerosol generating device 300 of any of the above-mentioned embodiments is realized.

[0167] For example, when the program is executed by the processor 420, the following control method of the aerosol generating device 300 is implemented:

[0168] 010: Obtain a corresponding relationship between a heating power of the plasma heating element 100 and an output voltage;

[0169] 020: Determine a heating stage in which the plasma heating element 100 is located;

[0170] 030: When the plasma heating element 100 is in a first heating stage, determine a first target output voltage of the plasma heating element 100 according to a first target heating power of the first heating stage and the corresponding relationship;

[0171] 040: When the plasma heating element 100 is in a second heating stage, adjust the second target output voltage of the plasma heating element 100 by PID control based on a second target heating power of the second heating stage;

[0172] Wherein, the first target heating power is greater than or equal to the second target heating power.

[0173] For example, when the program is executed by the processor 420, the following control method of the aerosol generating device 300 is implemented:

[0174] 031: When the plasma heating element 100 is in a first sub-heating stage, determine a first sub-target output voltage of the plasma heating element 100 according to a first sub-target heating power of the first sub-heating stage and the corresponding relationship;

[0175] Wherein, the first sub-target heating power is greater than the second target heating power.

[0176] It should be noted that the above-mentioned control method of the aerosol generating device 300 and the control device 200 are also applicable to the computer readable storage medium 400 of the present application, and will not be described here.

[0177] In summary, in the control method of the aerosol generating device 300, the control device 200, the aerosol generating device 300 and the computer readable storage medium 400 of the present application, in the first heating stage, the first target output voltage of the plasma heating element 100 is determined by looking up the corresponding relationship according to the first target heating power, and in the second heating stage, the second target output voltage of the plasma heating element 100 is adjusted by PID control according to the second target heating power. In this way, in the arc starting stage, the output voltage can quickly reach the breakdown voltage, and after the arc is started, continuous discharge can be achieved, reducing the risk of breakdown of the insulating material and improving the reliability of the plasma heating element 100.

[0178] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0179] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0180] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable storage medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, a computer-readable storage medium can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable storage medium could be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0181] It should be understood that parts of the present application can be realized in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be realized as software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if realized in hardware, and as in another embodiment, any one or a combination of the following technologies known in the art can be used: discrete logic circuitry having logic gates for implementing logic functions on data signals, application specific integrated circuits having appropriate combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), etc.

[0182] Those skilled in the art can understand that all or part of the steps carried out by the above-mentioned embodiment methods can be completed by programs instructing relevant hardware, and the programs can be stored in a computer readable storage medium. When the program is executed, it includes one of the steps of the method embodiment or a combination thereof. In addition, each functional unit in each embodiment of the present application can be integrated in one processing module, or each unit can be physically present separately, or two or more units can be integrated in one module. The above-mentioned integrated module can be realized in the form of hardware or in the form of a software function module. The integrated module, if realized in the form of a software function module and sold or used as an independent product, can also be stored in a computer readable storage medium. The above-mentioned storage medium can be a read-only memory, a magnetic disk or an optical disk, etc.

[0183] Although the embodiments of the present application have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A control method of an aerosol generating device, the control method comprising: The aerosol generating device includes a plasma heating body, and the control method includes: obtaining a correspondence between a heating power of the plasma heating body and an output voltage; determining a heating stage in which the plasma heating body is located; when the plasma heating body is in a first heating stage, determining a first target output voltage of the plasma heating body according to a first target heating power of the first heating stage and the correspondence; when the plasma heating body is in a second heating stage, controlling a second target output voltage of the plasma heating body by PID adjustment based on a second target heating power of the second heating stage; wherein the first target heating power is greater than or equal to the second target heating power.

2. The control method according to claim 1, characterized by, The control method further includes: updating the correspondence according to the second target heating power and the second target output voltage, and returning to the step of determining the heating stage in which the plasma heating body is located.

3. The control method according to claim 1, characterized by, The first heating stage includes a first sub-heating stage, which is an arc starting stage in a heating cycle of the plasma heating body, and the step of determining the first target output voltage of the plasma heating body according to the first target heating power of the first heating stage and the correspondence when the plasma heating body is in the first heating stage includes: determining a first sub-target output voltage of the plasma heating body according to a first sub-target heating power of the first sub-heating stage and the correspondence when the plasma heating body is in the first sub-heating stage; wherein the first sub-target heating power is greater than the second target heating power.

4. The control method according to claim 1, characterized by, The first heating stage includes a second sub-heating stage, which is a predetermined time period before a constant power maintaining stage in the heating cycle of the plasma heating body, and the step of determining the first target output voltage of the plasma heating body according to the first target heating power of the first heating stage and the correspondence when the plasma heating body is in the first heating stage includes: determining a second sub-target output voltage of the plasma heating body according to a second sub-target heating power of the second sub-heating stage and the correspondence when the plasma heating body is in the second sub-heating stage; wherein the second sub-target heating power is equal to the second target heating power.

5. The control method according to claim 4, characterized by The second heating stage is a predetermined time period after the constant power maintaining stage in the heating cycle of the plasma heating body, and the step of controlling the second target output voltage of the plasma heating body by PID adjustment based on the second target heating power of the second heating stage when the plasma heating body is in the second heating stage includes: obtaining an actual output power of the second sub-heating stage; calculating a power error between the actual output power and the second target heating power; controlling the second target output voltage by PID adjustment according to the power error.

6. The control method according to claim 1, characterized by The plasma heating body includes a control module and a heating body, and the control module is configured to adjust an actual output voltage to a target output voltage according to a target heating power to drive the heating body to heat.

7. The control method according to claim 6, characterized by The control module comprises a first power unit, a second power unit, a transformer, a PWM control unit and a master control unit, the actual output voltage and the target output voltage are actual output voltage and target output voltage of an input side of the transformer; The first power unit is configured to output a power voltage to the second power unit; The second power unit is configured to convert the direct-current power voltage into the actual output voltage of alternating current; The transformer is configured to step up the actual output voltage to a driving voltage, the driving voltage being configured to drive the heat generator to heat; The master control unit is configured to control the PWM control unit according to the target heating power, and adjust the power voltage by duty cycle to adjust the actual output voltage to the target output voltage.

8. The control method according to claim 6, characterized by, The heat generator comprises: a heating member, the heating member being internally formed with a heating cavity; and at least one group of electrode assemblies, each group of the electrode assemblies comprising a first electrode and a second electrode, the first electrode and the second electrode both extending into the heating cavity, and an electric arc being controllably formed between the first electrode and the second electrode in the heating cavity to generate plasma; wherein the heating member is configured to form a receiving site for receiving an aerosol generating substrate.

9. The control method according to claim 6, characterized by, The heat generator comprises: an inner tube; an outer tube, the outer tube being sleeved outside the inner tube; a first electrode, the first electrode being at least partially arranged in the inner tube; a second electrode, at least part of the second electrode being arranged at one end of the inner tube and being oppositely and spacedly arranged with the first electrode, the first electrode and the second electrode generating plasma between the second electrode and the first electrode when being electrified; and a conductive member, the conductive member being connected with the second electrode and being configured to be electrically connected with an external power supply, the conductive member extending from one end of the inner tube to the other end of the inner tube along an axial direction of the inner tube, wherein a tube segment of the inner tube corresponding to the conductive member partially faces the outer tube.

10. An aerosol-generating device comprising: The aerosol generating device comprises one or more processors and a memory, the memory storing a computer program, the computer program being executed by the processor to implement the control method of the aerosol generating device according to any one of claims 1-9.

Images