Method for controlling aerosol-generating device
By adjusting the switching frequency of the plasma power supply according to the heating time in the aerosol generator, the reliability and efficiency problems caused by heat concentration in the miniaturized design were solved, achieving performance optimization and reduced losses, and extending service life.
Patent Information
- Application Number
- CN202410986242.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2026-01-23
AI Technical Summary
In aerosol generation devices, how can we effectively manage the impact of switching frequency on power device losses, temperature, and overall efficiency while achieving high power and miniaturization, especially the reliability and efficiency issues caused by heat concentration in miniaturized designs?
By acquiring the heating time of the plasma heating component, the switching frequency of the plasma power supply is adjusted using preset curves and mapping tables to optimize performance and reduce losses, including dynamically adjusting the switching frequency using a microcontroller and pulse width modulation controller.
The performance of the plasma power supply has been optimized, losses have been reduced, stability and service life have been improved, and it can adapt to the needs of different application scenarios.
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Figure CN121369787A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of electronic atomization, and in particular to a control method of an aerosol generating device. BACKGROUND
[0002] An aerosol is a colloidal dispersion system formed by dispersing and suspending small particles of solid or liquid in a gaseous medium. Since the aerosol can be absorbed by the human body through the respiratory system, it provides a new type of alternative absorption method for users.
[0003] An aerosol generating device includes a plasma heating assembly and a plasma power supply, which uses a resistive or electromagnetic induction method to heat an aerosol generating substrate to deliver an inhalable aerosol to a user. In order to optimize the user's experience, the plasma power supply used by the aerosol generating device tends to be miniaturized.
[0004] In current plasma power supply design, how to effectively manage the impact of switching frequency on power device loss, temperature and overall efficiency while achieving high power and small size design is a technical problem.
[0005] With the increase of switching frequency, the size of key components such as transformers, inductors and capacitors can be significantly reduced. This is because the size of these components is often inversely proportional to their operating frequency, i.e. the higher the frequency, the smaller the volume of the required components. This feature allows more components to be integrated in a limited space, thereby increasing the power density of the plasma power supply, i.e. the output power per unit volume or weight, which is of great significance to the realization of high power and small size design of the plasma power supply.
[0006] However, each switching action will cause certain losses, including energy loss of the switch itself and heat generated thereby. With the increase of switching times, these losses will accumulate, causing the device temperature to rise, which in turn affects its reliability and overall efficiency. In small size design, due to limited space, heat is more easily concentrated, further exacerbating the problem. SUMMARY
[0007] Therefore, the present application aims to at least partially solve one of the problems in the related art. To this end, the purpose of the present application is to provide a control method of an aerosol generating device.
[0008] The application provides a control method of an aerosol generating device. The aerosol generating device comprises a plasma heating assembly for heating an aerosol generating substrate to generate an aerosol, and a plasma power supply for providing electric energy to the plasma heating assembly. The plasma power supply comprises a switch. The control method comprises: obtaining a current heating time of the plasma heating assembly; querying a current set output power of the plasma power supply corresponding to the current heating time of the plasma heating assembly according to a preset curve diagram, the preset curve diagram being a curve diagram of the correspondence between the heating time and the set output power; querying a set frequency of the switch corresponding to the current set output power according to a mapping relationship table, the mapping relationship table being a mapping relationship table of the set output power and the frequency of the switch; and controlling the switch to work according to the set frequency of the switch.
[0009] In some embodiments, the relationship between the set output power and the frequency of the switch in the mapping relationship table is a linear relationship.
[0010] In some embodiments, the linear relationship comprises that the value of the frequency of the switch decreases with the decrease of the value of the set output power.
[0011] In some embodiments, the linear relationship comprises that the frequency of the switch corresponds to a value less than or equal to a preset frequency value when the set output power is less than or equal to a preset power value.
[0012] In some embodiments, the linear relationship comprises that the frequency of the switch corresponds to a value greater than or equal to a preset frequency value when the set output power is greater than or equal to a preset power value.
[0013] In some embodiments, the plasma power supply comprises a microcontroller, the preset curve diagram is pre-stored in the microcontroller of the plasma power supply, and the mapping relationship table is pre-stored in the microcontroller of the plasma power supply.
[0014] In some embodiments, the plasma power supply further comprises a pulse width modulation controller and a power circuit, the microcontroller is configured with a pulse modulation attribute port for outputting a pulse modulation signal; and the controlling the switch to work according to the set frequency of the switch comprises: when a change in the set output power corresponding to the heating time is detected, controlling the pulse modulation attribute port to output a pulse modulation signal to the pulse width modulation controller; controlling the pulse width modulation controller to synchronously send a switch frequency signal corresponding to the pulse modulation signal to the power circuit; and controlling the frequency of the switch in the power circuit according to the switch frequency signal.
[0015] In some embodiments, the plasma heating assembly comprises a plasma generator and a heating controller, the plasma generator comprises: a heating piece, the heating piece is internally formed with a heating cavity; and at least one set of electrode assemblies, each set of electrode assemblies comprises a first electrode and a second electrode, the first electrode and the second electrode both extend into the heating cavity, and an arc can be controlled to be formed between the first electrode and the second electrode in the heating cavity to generate plasma; wherein the heating piece is capable of forming a receiving site for receiving an aerosol generating substrate; and the heating controller is configured to drive the plasma generator to generate plasma and heat, and heat the aerosol generating article.
[0016] In some embodiments, the plasma generator further comprises: an inner tube, the first electrode is at least partially arranged in the inner tube, at least a portion of the second electrode is arranged at one end of the inner tube and is arranged opposite and spaced apart from the first electrode, and the first electrode and the second electrode are powered to generate plasma between the second electrode and the first electrode; an outer tube, the outer tube is sleeved outside the inner tube; and a conductive piece, the conductive piece is connected to the second electrode and is configured to be electrically connected to an external power source, the conductive piece extends from one end of the inner tube to the other end of the inner tube along the axial direction of the inner tube, and the inner tube and the conductive piece correspondingly have a tube segment that partially faces the outer tube.
[0017] In some embodiments, the heating controller comprises a power supply module, a control driving module, a boost regulating module, an inverter conversion module and a boost transformer; the control driving module is electrically connected to the power supply module, and the control driving module is capable of generating a plurality of driving signals according to a heating time-power mapping relationship; the boost regulating module is electrically connected to the power supply module and the control driving module, respectively, and is configured to generate a direct current output voltage according to the power supply voltage of the power supply module and the driving signals, the direct current output voltage comprises a plurality of types, and different direct current output voltages have different magnitudes, each type of direct current output voltage corresponds to one type of driving signal; the inverter conversion module is electrically connected to the boost regulating module, and is configured to generate an alternating current output voltage according to the direct current output voltage; and the boost transformer is electrically connected to the inverter conversion module and the plasma generator, and is configured to generate a heating voltage according to the alternating current output voltage and provide the heating voltage to the plasma generator, so as to drive the plasma generator to generate plasma and heat, and heat the aerosol generating article.
[0018] In this way, the present application can determine the current set output power of the plasma power supply according to the heating time of the plasma heating assembly, flexibly adjust the frequency of the switch according to the real-time determined set output power, and thus achieve the purposes of optimizing performance and reducing loss.
[0019] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS
[0020] The above-mentioned and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings of exemplary embodiments and wherein:
[0021] Figure 1 is a flowchart of a control method of a plasma power supply according to some embodiments of the present application;
[0022] Figure 2 is a structural diagram of a control device of a plasma power supply according to some embodiments of the present application;
[0023] Figure 3 is a schematic diagram of an overall control flow of a control method of a plasma power supply according to some embodiments of the present application;
[0024] Figure 4 is a flowchart of a control method of a plasma power supply according to some embodiments of the present application;
[0025] Figure 5 is a structural diagram of a plasma generator according to some embodiments of the present application;
[0026] Figure 6 is a structural diagram of a plasma generator according to some embodiments of the present application;
[0027] Figure 7 is a structural diagram of a heating controller according to some embodiments of the present application;
[0028] Figure 8 is a structural diagram of a heating controller according to some embodiments of the present application.
[0029] The control device 100, the acquisition module 110, the first query module 120, the second query module 130, the control module 140; the plasma generator 200, the heating member 210, the heating cavity 211, the accommodating position 212, the electrode assembly 220, the first electrode 221, the second electrode 222, the inner tube 230, the outer tube 240, the conductive member 250; the heating controller 300; the power supply module 310, the electric core 311, the auxiliary power supply unit 312, the protection and charging unit 313, the control driving module 320, the boost regulating module 330, the inverter conversion module 340, the boost transformer 350. DETAILED DESCRIPTION
[0030] Embodiments of the present application are described in detail below with reference to the attached drawings, which show by way of example, embodiments in which like reference numerals refer to like elements or elements having similar functions. The embodiments described below are exemplary only, and are not to be construed as limiting the present application.
[0031] In the description of the present application, the terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance, or implying the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.
[0032] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting" should be understood in a broad sense, which can mean fixed connection, or detachable connection, or integral connection; can be mechanical connection, or electrical connection or can communicate with each other; can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0033] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can refer to the same reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or arrangements discussed.
[0034] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary, only for explaining the present application, and cannot be understood as limiting the present application.
[0035] Please refer to Figure 1 The embodiment of the present application discloses a control method of an aerosol generating device. The aerosol generating device includes a plasma heating assembly and a plasma power supply, the plasma heating assembly is used for heating an aerosol generating substrate to generate an aerosol, the plasma power supply provides electric energy for the plasma heating assembly, the plasma power supply includes a switch, and the control method includes:
[0036] 01: acquiring the current heating time of the plasma heating assembly;
[0037] 02: querying the current set output power of the plasma power supply corresponding to the current heating time of the plasma heating assembly according to a preset curve, the preset curve being a curve of the corresponding relationship between heating time and set output power;
[0038] 03: query the set frequency of the switch corresponding to the current set output power according to the mapping relationship table, and the mapping relationship table is a mapping relationship table of the set output power and the frequency of the switch;
[0039] 04: control the switch to work according to the set frequency of the switch.
[0040] Please refer to Figure 2 The application also provides a control device 100 of a plasma power supply, which can be included in the plasma power supply or not, and is externally connected to the plasma power supply. The control method of the plasma power supply of the application is realized by controlling the frequency of the switch through the control device 100. The control device includes an acquisition module 110, a first query module 120, a second query module 130 and a control module 140.
[0041] That is, step 01 can be realized by the acquisition module 110, step 02 can be realized by the first query module 120, step 03 can be realized by the second query module 130, and step 04 can be realized by the control module 140. That is, the acquisition module 110 is used to acquire the current heating time of the plasma heating assembly; the first query module 120 is used to query the current set output power corresponding to the current heating time of the plasma heating assembly according to a preset curve diagram, and the preset curve diagram is a corresponding relationship curve diagram of heating time and set output power; the second query module 130 is used to query the set frequency of the switch corresponding to the set output power according to a mapping relationship table, and the mapping relationship table is a mapping relationship table of the set output power and the frequency of the switch; and the control module 140 is used to control the switch to work according to the set frequency of the switch.
[0042] The preset curve diagram is a relationship curve diagram formed by a table of the corresponding relationship between the heating time of the plasma heating assembly and the set output power of the plasma power supply. For example, the application determines the power level that the plasma power supply should output in different time periods through experiments, and makes a table as shown in Table 1, and then forms a curve diagram of heating time and set output power according to Table 1.
[0043] Table 1
[0044]
[0045]
[0046] As shown in Table 1, the starting plasma heating assembly heats the aerosol generating substrate, and when the heating time is from 0 ms to 10 ms, the plasma power supply controls the plasma heating assembly to heat the aerosol generating substrate at a set output power of 170 W. Subsequently, when the heating time is from 10 ms to 810 ms, the plasma power supply controls the plasma heating assembly to heat the aerosol generating substrate at a power of 70 W. Then, when the heating time is from 810 ms to 1110 ms, the power is reduced to 30 W for continuous heating. After 400 ms, the next heating is continued, and the process is repeated until the heating work is completed.
[0047] The preset curve of the heating time of the plasma heating assembly and the set output power of the plasma power supply can be used to describe the change of the output power of the plasma power supply at different working time points. Based on the curve of the heating time of the plasma heating assembly and the set output power of the plasma power supply, the power value of the set output power of the plasma power supply corresponding to the current heating time of the plasma heating assembly can be queried.
[0048] After determining the current set output power of the plasma power supply according to the current heating time of the plasma heating assembly, the set frequency of the switch is determined according to the mapping relationship table of the set output power and the frequency of the switch, and then the switch is controlled to work according to the set frequency of the switch.
[0049] The mapping relationship table may, for example, be shown in Table 2.
[0050] Table 2
[0051] Power (10 mW) Frequency (kHz) 0 200 3000 150 3500 160 4000 170 4500 180 5000 190 5500 200 6000 210 6500 220 7000 230
[0052] In this way, the current set output power of the plasma power supply can be determined according to the current heating time of the plasma heating assembly, so that the frequency of the switch can be flexibly adjusted according to the real-time determined set output power, thereby achieving the purposes of optimizing performance and reducing loss.
[0053] In some embodiments, the relationship between the set output power and the frequency of the switch in the mapping relationship table is a linear relationship.
[0054] Specifically, in the high-power mode, the frequency corresponding to the plasma power supply power of 7000 (10 mW) is 230 kHz. Although setting a high switch frequency in the high-power mode increases the switch loss, this can be handled by optimizing the heat dissipation design and other technical means. It is necessary to use a high switch frequency to enhance the efficiency and performance of the plasma power supply. In the low-power mode, the frequency corresponding to the plasma power supply power of 3000 (10 mW) is 150 kHz. By reducing the switch frequency, the loss and temperature rise can be significantly reduced, the overall stability can be improved, and the service life of the plasma power supply can be prolonged.
[0055] Generally, when the output power of the plasma power supply is set to be large (abnormal state), high efficiency and high performance are prioritized, and a higher switching frequency is used. When the output power is set to be small (normal state), low loss and temperature rise are prioritized, and a lower switching frequency is used. The relationship between the set output power and the frequency of the switch is linear.
[0056] In some embodiments, the linear relationship includes that the value of the frequency of the switch decreases as the value of the set output power decreases. Reducing the switching frequency when the power demand decreases can reduce the generation of heat, thereby reducing the operating temperature of the device and reducing the impact of thermal stress on the performance of the device.
[0057] In some embodiments, the linear relationship includes that when the set output power is less than or equal to a preset power value, the frequency of the switch corresponds to less than or equal to a preset frequency value. If the currently set output power of the plasma power supply is less than or equal to the preset power value, according to the linear relationship described above, the current switching frequency of the plasma power supply will also be less than or equal to the corresponding preset frequency value.
[0058] In some embodiments, the linear relationship includes that when the set output power is greater than or equal to a preset power value, the frequency of the switch corresponds to greater than or equal to a preset frequency value. If the currently set output power of the plasma power supply is greater than or equal to the preset power value, according to the linear relationship described above, the current switching frequency of the plasma power supply will also be greater than or equal to the corresponding preset frequency value.
[0059] Referring to Figure 3 , the plasma power supply includes a microcontroller unit (MCU), the preset curve graph is pre-stored in the microcontroller of the plasma power supply, and the mapping relationship table is pre-stored in the microcontroller of the plasma power supply.
[0060] Specifically, the present application can determine the relationship curve graph of the plasma heating time of the plasma power supply and the set output power according to the experimental research on the corresponding relationship between the heating time of the plasma heating assembly and the output power of the plasma power supply. The relationship curve graph can be pre-stored in the microcontroller as a preset curve graph for calling.
[0061] The MCU pre-stores a mapping table of set output power and corresponding appropriate switching frequency. In this way, when the plasma power supply needs higher output power, the MCU will select a higher switching frequency to control the switch to meet the power demand; conversely, when the power demand is smaller, a lower switching frequency is selected to control the switch to reduce loss and temperature rise. Through the mapping table, the MCU can realize accurate control of the output characteristics of the power supply, and adjust the switching frequency according to the actual demand to improve the energy efficiency of the power supply, reduce loss and prolong the service life. This design not only improves the performance of the plasma power supply, but also makes it more suitable for different application scenarios.
[0062] Referring to Figure 3 and Figure 4 In some embodiments, the plasma power supply further includes a pulse width modulation controller and a power circuit. The microcontroller is configured with a pulse modulation attribute port for outputting a pulse modulation signal. The frequency of the switch is controlled according to the switching frequency, and step 04 includes:
[0063] 041: When a change in the set output power corresponding to the heating time is detected, the microcontroller controls the pulse modulation attribute port to output a pulse modulation signal to the pulse width modulation controller master chip;
[0064] 042: The pulse width modulation controller master chip sends a switching frequency signal corresponding to the pulse modulation signal to the power circuit after processing;
[0065] 043: The frequency of the switch in the power circuit is controlled according to the switching frequency signal.
[0066] Steps 041, 042 and 043 can be implemented by the control module 140. That is, the control module 140 is used to control the MCU to output a pulse modulation signal to the pulse width modulation controller master chip when a change in the set output power corresponding to the heating time is detected; control the pulse width modulation controller master chip to send a switching frequency signal corresponding to the pulse modulation signal to the power circuit after processing; and control the frequency of the switch in the power circuit according to the switching frequency signal.
[0067] Specifically, Figure 3 The control unit in the above can include a pulse width modulation controller, and the driving unit can include a power circuit.
[0068] The pulse modulation attribute port is used to connect the microcontroller and the pulse width modulation controller.
[0069] Pulse-Width Modulation (PWM) is a technique that can use the digital signal output of a microprocessor to control an analog circuit. PWM technology can achieve precise control of output voltage or current by adjusting the duty cycle of the PWM signal, and can dynamically adjust the output power according to actual needs, thereby achieving the purpose of high efficiency and energy saving, and reducing circuit loss.
[0070] The pulse modulation signal can be referred to as a PWM signal. The generation of the PWM signal depends on the microprocessor and the pulse width modulation controller. These devices contain high-resolution counters and comparators inside. By configuring parameters such as the counting speed, counting method, timer loading value, and comparator value of the counter, a PWM signal with a specific frequency and duty cycle can be generated.
[0071] The switching frequency signal can be an electrical signal, and the frequency of the switch in the power circuit can be controlled by the switching frequency signal.
[0072] In this way, the application can realize the control of the frequency of the switch in the power circuit through the microcontroller and the pulse width modulation controller, so as to realize the adjustment of the switching frequency corresponding to the set output power of different plasma power supplies.
[0073] In some embodiments, the plasma heating assembly includes a plasma generator 200 and a heating controller 300. The heating controller 300 is used to drive the plasma generator 200 to generate plasma and heat, and heat the aerosol generating article. Please refer to Figure 5 The plasma generator 200 includes a heating element 210 and at least one set of electrode assemblies 220. The heating element 210 has a heating cavity 211 formed inside. Each set of electrode assemblies 220 includes a first electrode 221 and a second electrode 222. Both the first electrode 221 and the second electrode 222 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. In other words, the first electrode 221 and the second electrode 222 both extend into the heating cavity 211 of the heating element 210. An arc is generated between the first electrode 221 and the second electrode 222 under alternating current or direct current, and then the gas in the heating cavity 211 is ionized to form plasma. The plasma heats the heating cavity 211. In addition, the heating element 210 has a receiving position 212 adjacent to the heating cavity 211, which is used to carry the aerosol generating substrate. After the heating cavity 211 is heated by the plasma, heat can be transferred to the adjacent receiving position 212, and then the aerosol generating substrate arranged on the receiving position 212 is heated.
[0074] Thus, the heat generated by the plasma in the heating cavity 211 is used to quickly heat the aerosol generating substrate, the high energy density characteristics of plasma heating shorten the preheating waiting time, facilitate user use, and prevent the aerosol generating substrate from being burnt due to a long preheating time, thereby improving the atomization taste. Meanwhile, the metal parts such as the electrode do not need to be in direct contact with the aerosol generating substrate during the heating process, which can prevent the aerosol generating substrate from being doped with metal substances after atomization, thereby further improving the atomization taste.
[0075] In some embodiments, the plasma generator 200 further comprises an inner tube 230, an outer tube 240, and a conductive member 250. The first electrode 221 is at least partially arranged in the inner tube 230, and the second electrode 222 is at least partially arranged at one end of the inner tube 230 and is arranged opposite and spaced apart from the first electrode 221. When the first electrode 221 and the second electrode 222 are energized, plasma is generated between the second electrode 222 and the first electrode 221. The outer tube 240 is sleeved on the outer tube 230. The conductive member 250 is connected to the second electrode 222 and is used to electrically connect to the external power source. The conductive member 250 extends from one end of the inner tube 230 to the other end of the inner tube 230 along the axial direction of the inner tube 230. The tube segment of the inner tube 230 corresponding to the conductive member 250 partially faces the outer tube 240.
[0076] Specifically, referring to Figure 6 The conductive member 250 is connected to the second electrode 222 and is used to electrically connect to the power source. The conductive member 250 extends from one end of the inner tube 230 to the other end of the inner tube 230 along the axial direction of the inner tube 230. Along the axial direction of the inner tube 230, the tube segment of the inner tube 230 corresponding to the conductive member 250 partially faces the outer tube 240.
[0077] It should be noted that the tube segment of the inner tube 230 corresponding to the conductive member 250 can be the portion of the inner tube 230 between the two ends in the axial direction of the conductive member 250. The axial length of the tube segment of the inner tube 230 corresponding to the conductive member 250 and the conductive member 250 can be substantially equal, and the two ends are substantially aligned. In addition, it can also be understood that in order to electrically connect the second electrode 222 to the power source 200, the conductive member 250 is needed for connection. However, the second electrode 222 and the conductive member 250 are not necessarily two separate components. They can be made of the same material or integrally formed as a whole. The part opposite to the first electrode 221 is used as an electrode, and the remaining part is used for electrical connection. In this application, the second electrode 222 and the conductive member 250 are described as two components, which cannot be used as a limitation on the whole and the parts. Instead, it is for better description and explanation.
[0078] In the plasma generator 200 of the embodiment, the inner tube 230 and the pipe segment corresponding to the conductive member 250 of the outer tube 240 partially face each other, which reduces the volume of the conductive member 250, thereby reducing the heat capacity of the conductive member 250, so that the conductive member 250 stores less heat, and so that more heat generated by the plasma generator 200 can be directly radiated to the aerosol-forming substrate through the inner tube 230 and the outer tube 240, thereby improving the heat utilization rate, and further improving the heating rate and the heating efficiency of the aerosol-forming substrate.
[0079] Referring to Figure 7 In some embodiments, the heating controller 300 includes a power supply module 310, a control driving module 320, a boost regulating module 330, an inverter conversion module 340, and a boost transformer 350. The control driving module 320 is electrically connected to the power supply module 310, and the control driving module 320 is capable of generating a plurality of driving signals according to a heating time-power mapping relationship. The boost regulating module 330 is electrically connected to the power supply module 310 and the control driving module 320, respectively, and is configured to generate a direct current output voltage according to the power supply voltage of the power supply module 310 and the driving signals. The direct current output voltage includes a plurality of types, and different direct current output voltages have different magnitudes. Each type of direct current output voltage corresponds to one type of driving signal. The inverter conversion module 340 is electrically connected to the boost regulating module 330, and is configured to generate an alternating current output voltage according to the direct current output voltage. The boost transformer 350 is electrically connected to the inverter conversion module 340 and the plasma generator 200, and is configured to generate a heating voltage according to the alternating current output voltage and provide the heating voltage to the plasma generator 200, so that the plasma generator 200 generates plasma and heats to heat the aerosol generating article.
[0080] Specifically, referring to Figure 7 The heating controller 300 includes a power supply module 310, a control driving module 320, a boost regulating module 330, an inverter conversion module 340, and a boost transformer 350. The control driving module 320 is electrically connected to the power supply module 310, and the control driving module 320 is capable of generating a plurality of driving signals. The boost regulating module 330 is electrically connected to the power supply module 310 and the control driving module 320, respectively, and is configured to generate a direct current output voltage according to the power supply voltage of the power supply module 310 and the driving signals. The direct current output voltage includes a plurality of types, and each type of direct current output voltage corresponds to one type of driving signal. The inverter conversion module 340 is electrically connected to the boost regulating module 330, and the inverter conversion module 340 is configured to generate an alternating current output voltage according to the direct current output voltage. The boost transformer 350 is electrically connected to the inverter conversion module 340 and the plasma, and the boost transformer 350 is configured to generate a heating voltage according to the alternating current output voltage and provide the heating voltage to the plasma, so that the plasma realizes an arc striking or discharging function.
[0081] Specifically, referring to Figure 8The power module 310 can include an electric core 311, an auxiliary power supply unit 312, and a protection and charging unit 313. The electric core 311 can be a rechargeable direct current core 311, such as a lithium ion battery, a nickel-cadmium battery, a nickel-iron battery, or a nickel-hydrogen battery, and can be charged through a charging interface connected to an external power source. In this embodiment, the electric core 311 can be taken as a lithium ion battery for illustration. The auxiliary power supply unit 312 is connected to the electric core 311 and is used to supply power to various chips or active devices in the internal system of the aerosol generating device. For example, the auxiliary power supply unit 312 is electrically connected to the control and driving module 320 and is used to supply power to the control and driving module 320. The protection and charging unit 313 is electrically connected to the electric core 311 and is used to protect the electric core 311 from overcharge, overdischarge, overcurrent, short circuit, and other abnormal conditions, and to realize the battery charging function. It can be understood that the aerosol generating device has a small size, and the heating controller 300 uses the electric core 311 to provide power for the entire device, thereby facilitating user carrying.
[0082] The control and driving module 320 is the control center of the heating controller 300 and can realize overall logic control, protection mechanism, operation logic control, timing logic control, power control, and driving control of the heating controller 300. The control and driving module 320 is electrically connected to the boost regulation module 330 and can provide a driving signal to the boost regulation module 330 to control the size of the direct current output voltage of the boost regulation module 330. The driving signal can include multiple types, and each type of driving signal has a different duty cycle to achieve different effects. For example, the driving signal can include a first driving signal and a second driving signal, wherein the first driving signal is used to realize the arc striking of the plasma generator 200, and the second driving signal is used to realize the discharge of the plasma generator 200. In some examples, the driving signal provided by the control and driving module 320 to the boost regulation module 330 can be a pulse width modulation signal, and different driving signals have different duty cycles.
[0083] The boost regulation module 330 is used to realize energy demand conversion. The boost regulation module 330 can adjust the output voltage to match the actual power demand or the temperature demand of the plasma generator 200. Specifically, the boost regulation module 330 can be electrically connected to the electric core 311 of the power module 310, the control and driving module 320, and the inverter conversion module 340. The boost regulation module 330 can output a direct current output voltage according to the driving signal and the power supply voltage output by the electric core 311. The direct current output voltage can be greater than the power supply voltage, that is, the boost regulation module 330 can convert the power supply voltage according to the driving signal and output a direct current output voltage greater than the power supply voltage. The direct current output voltage can include multiple types, each type of direct current output voltage corresponds to a driving signal, and different direct current output voltages have different sizes.
[0084] The boost regulating module 330 can adopt a boost chopper circuit (Boost circuit) or a buck-boost circuit (Buck_Boost circuit) or the like DC-DC conversion circuit, so as to convert the DC output voltage output by the battery cell 311 from the power supply voltage to another higher voltage level. As can be understood by those skilled in the art, the Boost circuit is a kind of boost circuit, which can increase the input voltage to a higher output voltage than the input voltage. In the Boost circuit, the on and off state of the switch tube (such as MOSFET or IGBT) controls the charging and discharging process of the inductor, so as to realize the voltage boost. The Buck_Boost circuit is a kind of circuit with boost and buck functions, which can realize the output voltage higher or lower than the input voltage under certain conditions. The Buck_Boost circuit controls the charging and discharging process of the inductor by changing the on and off time of the switch tube (i.e. duty ratio), so as to realize the boost and buck of the voltage.
[0085] When the boost regulating module 330 adopts the Boost circuit, the corresponding relationship between the DC output voltage and the power supply voltage can be expressed as follows:
[0086] Vout_Boost = Vin / (1-D)
[0087] Wherein, Vin is the power supply voltage, D is the duty ratio of the driving signal, and Vout_Boost is the DC output voltage.
[0088] When the boost regulating module 330 adopts the Buck_Boost circuit, the corresponding relationship between the DC output voltage and the power supply voltage can be expressed as follows:
[0089] Vout_Buck_Boost = Vin*D / (1-D)
[0090] Wherein, Vin is the power supply voltage, D is the duty ratio of the driving signal, and Vout_Buck_Boost is the DC output voltage.
[0091] The inverter conversion module 340 is the power conversion unit of the heating controller 300, which is used to realize the conversion of energy demand, and the inverter conversion module 340 can convert the DC into AC. Specifically, the inverter conversion module 340 can be electrically connected with the control driving module 320, the boost regulating module 330 and the boost transformer 350 respectively, and the inverter conversion module 340 can convert the DC output voltage output by the boost regulating module 330 into AC output voltage under the driving of the control driving module 320, and input into the boost transformer 350. In this way, the boost transformer 350 boosts the AC output voltage to a heating voltage that can realize the arc striking or discharging of the plasma generator 200.
[0092] The inverter conversion module 340 can adopt an inverter circuit such as a half-bridge circuit or a full-bridge circuit. As can be understood by those skilled in the art, the half-bridge circuit is a circuit structure composed of two transistors (or MOSFETs), which can realize direct current to alternating current conversion or voltage / current smoothing, and has the characteristics of simple structure and high efficiency. The full-bridge circuit is composed of four switching tubes (usually transistors or MOSFETs) and a load, which can realize efficient direct current to alternating current conversion.
[0093] The step-up transformer 350 is used to realize step-up transformation of the variable ratio, and includes a primary side and a secondary side coupled with the primary side, wherein the primary side is electrically connected with the inverter conversion module 340, and the secondary side is connected with the plasma generator 200. The step-up transformer 350 can convert the step-up of the alternating output voltage output by the inverter conversion module 340 to obtain a heating voltage, and output to the plasma generator 200, so as to realize the arc striking and discharge of the plasma generator 200.
[0094] The step-up transformer 350 can adopt a multi-slot transformer winding design to improve the withstand voltage capability. In the embodiment, the number of turns of the primary winding can be 2T, and the number of turns of the secondary winding can be 910T. The heating voltage is a high-frequency alternating voltage, and the voltage value of the heating voltage ranges from 2 kilovolts to 10 kilovolts. For example, the heating voltage can be 2 kilovolts, 3 kilovolts, 4 kilovolts, 5 kilovolts, 7 kilovolts, 8 kilovolts or 10 kilovolts, and the specific voltage value of the heating voltage is not limited. The heating voltage can include an arc striking voltage and a discharge voltage, wherein the arc striking voltage can be used to realize the arc striking of the plasma generator 200, and the discharge voltage can be used to realize the arc discharge of the plasma generator 200. For example, the arc striking voltage is greater than the voltage value of the heating voltage, for example, the arc striking voltage can be 7 kilovolts or 8 kilovolts, and the heating voltage can be 2 kilovolts or 3 kilovolts.
[0095] When the inverter conversion module 340 adopts a half-bridge circuit, the corresponding relationship between the heating voltage and the direct current output voltage can be expressed as follows:
[0096] Vac=(Vout_Boost / 2)*NS / NP or Vac=(Vout_Buck_Boost / 2)*NS / NP;
[0097] Wherein, Vac is the heating voltage, NS is the number of turns of the secondary winding, NP is the number of turns of the primary winding, Vout_Boost is the direct current output voltage output by the boost circuit when the boost regulation module 330 adopts the boost circuit, and Vout_Buck_Boost is the direct current output voltage output by the Buck_Boost circuit when the boost regulation module 330 adopts the Buck_Boost circuit.
[0098] When the full-bridge circuit is adopted in the inverter conversion module 340, the corresponding relationship between the heating voltage and the DC output voltage can be expressed as follows:
[0099] Vac=(Vout_Boost)*NS / NP or Vac=(Vout_Buck_Boost)*NS / NP;
[0100] wherein Vac is the heating voltage, NS is the number of turns of the secondary winding, NP is the number of turns of the primary winding, Vout_Boost is the DC output voltage output by the boost regulation module 330 when the boost circuit is adopted, and Vout_Buck_Boost is the DC output voltage output by the boost regulation module 330 when the Buck_Boost circuit is adopted.
[0101] That is to say, in the embodiment, the combination of the boost regulation module 330 and the inverter conversion module 340 can be a boost chopper circuit plus a half-bridge circuit, a boost chopper circuit plus a full-bridge circuit, a boost-buck circuit plus a half-bridge circuit, or a boost-buck circuit plus a half-bridge circuit.
[0102] In this way, by adjusting the driving signal output by the control driving module 320 to the boost regulation module 330 to change the DC output voltage output by the boost regulation module 330, the heating voltage output by the boost transformer 350 to the plasma generator 200 is changed, so that the switching of the arc ignition and discharge of the plasma generator 200 and the power regulation during the discharge can be realized. That is, the heating controller 300 in the embodiment can change the heating voltage by adjusting the driving signal, so that the switching of the arc ignition and discharge of the plasma generator 200 and the power regulation during the discharge can be realized, so that stable heating or cooling of the aerosol generating article can be realized, and the miniaturization design of the aerosol generating device is facilitated.
[0103] The above embodiments only express several embodiments of the present application, which are described in detail and specifically, but should not be understood as limiting the scope of the patent of the present application. It should be noted that, for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.
Claims
1. A control method of an aerosol generating device, the control method comprising: The aerosol-generating device comprises a plasma heating assembly for heating an aerosol-generating substrate to generate an aerosol, and a plasma power supply for providing electrical energy to the plasma heating assembly, the plasma power supply comprising a switch, and the control method comprises: obtaining a current heating time of the plasma heating assembly; obtaining a current set output power of the plasma power supply corresponding to the current heating time of the plasma heating assembly according to a preset curve diagram, the preset curve diagram being a curve diagram of the correspondence between the heating time and the set output power; obtaining a set frequency of the switch corresponding to the current set output power according to a mapping relationship table, the mapping relationship table being a mapping relationship table of the set output power and the frequency of the switch; and controlling the switch to work according to the set frequency of the switch.
2. The control method according to claim 1, characterized by, The relationship between the set output power and the frequency of the switch in the mapping relationship table is a linear relationship.
3. The control method according to claim 2, characterized by, The linear relationship includes that the numerical value of the frequency of the switch decreases as the numerical value of the set output power decreases.
4. The control method according to claim 3, characterized by, The linear relationship includes that the frequency of the switch corresponds to a value less than or equal to a preset frequency value when the set output power is less than or equal to a preset power value.
5. The control method according to claim 2, characterized by, The linear relationship includes that the frequency of the switch corresponds to a value greater than or equal to a preset frequency value when the set output power is greater than or equal to a preset power value.
6. The control method according to claim 2, characterized by The plasma power supply comprises a microcontroller, the preset curve diagram is pre-stored in the microcontroller of the plasma power supply, and the mapping relationship table is pre-stored in the microcontroller of the plasma power supply.
7. The control method according to claim 6, characterized by The plasma power supply further comprises a pulse width modulation controller and a power circuit, the microcontroller is configured with a pulse modulation attribute port for outputting a pulse modulation signal; and the controlling the switch to work according to the set frequency of the switch comprises: when a change in the set output power corresponding to the heating time is detected, controlling the pulse modulation attribute port to output a pulse modulation signal to the pulse width modulation controller; controlling the pulse width modulation controller to synchronously send a switch frequency signal corresponding to the pulse modulation signal to the power circuit; and controlling the frequency of the switch in the power circuit according to the switch frequency signal.
8. The control method according to claim 1, characterized by, The plasma heating assembly comprises a plasma generator and a heating controller, the plasma generator comprising: a heating element, the heating element having a heating cavity formed inside; and at least one set of electrode assemblies, each set of 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; and the heating element being capable of forming a holding position for holding an aerosol-generating substrate; 9. The control method according to claim 8, characterized by, the heating controller being configured to drive the plasma generator to generate plasma and heat an aerosol-generating article. The plasma generator further comprises: An inner tube, the first electrode is at least partially arranged in the inner tube, at least part of the second electrode is arranged at one end of the inner tube and is arranged opposite and spaced apart from the first electrode, the first electrode and the second electrode are powered to generate plasma between the second electrode and the first electrode; An outer tube, the outer tube is sleeved outside the inner tube; and An electrically conductive part, the electrically conductive part is connected to the second electrode and is used for electrically connecting with an external power supply, the electrically conductive part extends from one end of the inner tube to the other end of the inner tube along the axial direction of the inner tube, wherein the inner tube and the corresponding pipe segment of the electrically conductive part partially face the outer tube.
10. The control method according to claim 8, characterized by, The heating controller comprises a power supply module, a control driving module, a boost regulating module, an inverter conversion module and a boost transformer; The control driving module is electrically connected with the power supply module, and the control driving module can generate a plurality of driving signals according to a heating time-power mapping relationship; The boost regulating module is electrically connected with the power supply module and the control driving module respectively, and is used for generating a direct current output voltage according to the power supply voltage of the power supply module and the driving signal, the direct current output voltage comprises a plurality of kinds, and different direct current output voltages are different in size, each direct current output voltage corresponds to one driving signal; The inverter conversion module is electrically connected with the boost regulating module, and is used for generating an alternating current output voltage according to the direct current output voltage; The boost transformer is electrically connected with the inverter conversion module and the plasma generator, and is used for generating a heating voltage according to the alternating current output voltage and providing the heating voltage to the plasma generator, driving the plasma generator to generate plasma and heat, and heating the aerosol generating article.