An aerosol generating device and a control method thereof

Abstract

The application provides an aerosol generating device and a control method thereof. The aerosol generating device includes a heating cavity, a heating device, and a control element. The heating cavity is configured to removably accommodate an aerosol generating article. The heating device is configured to heat the aerosol generating article to generate an aerosol for smoking. The control unit is configured to control the heating temperature of the heating device to meet a preset temperature and to cause the heating device to generate an oscillation working condition parameter by using a proportional-integral-derivative control algorithm. The control unit is further configured to determine an action state according to a change trend of the working condition parameter, to achieve action recognition of the aerosol generating article, and to have high recognition accuracy by using the change trend of the working condition parameter of the heating device, to avoid dry burning of the device, and to prolong the service life of the device.

Description

Technical Field

[0001] This invention relates to the field of aerosol generation technology, and in particular to an aerosol generation device and its control method. Background Technology

[0002] Traditional aerosol-generating products are burned during use to produce aerosols for inhalation. Today, efforts are being made to replace these combustion-generating aerosol products by creating products that release compounds without combustion.

[0003] Examples of such products include aerosol generating devices that release compounds by heating rather than burning materials. For example, the material could be tobacco or other non-tobacco products, which may or may not contain nicotine. During the heating process, for example before a preset heating process is complete, the material may be removed from the device due to user operation. If this movement is not accurately detected, the device will be left in a dry-burning state, affecting its lifespan. Summary of the Invention

[0004] This invention provides an aerosol generating device and its control method to accurately determine the operating status of the aerosol-generated product, avoid dry burning of the device, and extend the device's lifespan.

[0005] According to one aspect of the present invention, an aerosol generating apparatus is provided, the aerosol generating apparatus comprising a heating chamber, a heating device, and a control unit;

[0006] A heating chamber for removably containing aerosol-generated articles;

[0007] Heating devices are used to heat aerosol-generating products to generate aerosols for pumping.

[0008] The control unit is configured to use a proportional-integral-derivative control algorithm to control the heating temperature of the heating device to meet the preset temperature and cause the heating device to oscillate, and to determine the operating state of the aerosol-generated product based on the changing trend of the operating parameters.

[0009] Optionally, the control unit is configured to use the proportional-integral-derivative control algorithm with an increased proportional coefficient to control the operating parameters of the heating device to generate oscillations, so that the heating temperature of the heating device meets the preset temperature.

[0010] Optionally, the control unit is configured to use the proportional-integral-derivative control algorithm with reduced derivative coefficients to control the operating parameters of the heating device to generate oscillations, so that the heating temperature of the heating device meets the preset temperature.

[0011] Optionally, the proportional-integral-derivative (PID) control algorithm is configured as a fuzzy incremental PID control algorithm.

[0012] Optionally, the operating parameters are configured as at least one of operating voltage, operating current, or heating power.

[0013] Optionally, the action state includes a removal state;

[0014] The control unit is configured to determine that the aerosol-generating article is in the removal state when the peak increment of the heating power exceeds the increment threshold.

[0015] Optionally, the action state includes a suction state;

[0016] The control unit is configured to determine that the aerosol-generating product is in the suction state when the peak increment of the heating power is a positive increment and does not exceed the increment threshold.

[0017] Optionally, the control unit is configured to execute a first-stage control process after the device is started; in the first stage, the control unit uses the proportional-integral-derivative control algorithm to control the heating temperature of the heating device to increase to the target temperature;

[0018] After the heating temperature increases to the target temperature, the control unit executes the second stage of the control process. In the second stage, the control unit uses the proportional-integral-derivative control algorithm to control the heating temperature of the heating device to meet the preset temperature and to make the heating device oscillate. It also determines the operating state of the aerosol-generated product based on the changing trend of the operating parameters.

[0019] According to another aspect of the present invention, a method for controlling an aerosol generating apparatus is provided, the method comprising:

[0020] The proportional-integral-derivative control algorithm is used to control the heating temperature of the heating device to meet the preset temperature and to make the heating device oscillate.

[0021] The operational status of the aerosol-generated product is determined based on the changing trends of the operating parameters.

[0022] Optionally, the operating parameters for controlling the heating temperature of the heating device to meet a preset temperature and causing the heating device to oscillate, using a proportional-integral-derivative control algorithm, include:

[0023] The proportional-integral-derivative (PID) control algorithm with an increased proportional coefficient and / or a decreased derivative proportional coefficient is used to control the heating temperature of the heating device to meet the preset temperature and to cause the heating device to oscillate.

[0024] Optionally, determining the operational status of the aerosol-generated product based on the changing trends of the operating parameters includes:

[0025] If the peak increment of heating power exceeds the increment threshold, the aerosol-generated product is determined to be in a removal state.

[0026] Optionally, determining the operational status of the aerosol-generated product based on the changing trends of the operating parameters includes:

[0027] If the peak increment of the heating power is a positive increment and does not exceed the increment threshold, the aerosol-generating product is determined to be in a suction state.

[0028] This invention discloses an aerosol generation apparatus and its control method. The apparatus includes a heating chamber, a heating element, and a control element. The heating chamber is used to removably contain the aerosol generation product. The heating element is used to heat the aerosol generation product to generate an aerosol for suction. The control unit is configured to use a proportional-integral-derivative (PID) control algorithm to control the heating temperature generated by the heating element to meet a preset temperature and to cause the heating element to oscillate. The control unit determines the operating state based on the changing trends of the operating parameters, achieving action recognition of the aerosol generation product. The accuracy of recognizing the changing trends using the state parameters of the heating element is high, preventing the apparatus from drying out and extending its lifespan.

[0029] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic diagram illustrating the composition of an aerosol generating device and its corresponding aerosol generating product provided in an embodiment of the present invention;

[0032] Figure 2A schematic diagram of the heating power variation curve of a heating device for an aerosol-generated product under static state, provided as an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of the heating power variation curve of a heating device in the suction and removal states of an aerosol-generating product provided in an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the state of an aerosol-generated article under a removal state, provided by an embodiment of the present invention.

[0035] Figure 5 This is a schematic diagram of the state of an aerosol-generated product under suction conditions provided in an embodiment of the present invention;

[0036] Figure 6 This is a measured curve of the heating power variation of a heating device provided in an embodiment of the present invention;

[0037] Figure 7 A flowchart illustrating a control method for an aerosol generation device provided in an embodiment of the present invention;

[0038] Figure 8 A flowchart illustrating a control method for another aerosol generation device provided in an embodiment of the present invention. Detailed Implementation

[0039] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0040] It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist therebetween. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist therebetween. The terms "first" and "second," "an" and "another," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data used can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatuses.

[0041] To address the problems mentioned in the background art, this application proposes an aerosol generation device. Figure 1 This is a schematic diagram illustrating the composition of an aerosol generating device and its corresponding aerosol generating product according to an embodiment of the present invention. The diagram is for simplification and clarity. Figure 1 The control unit connection relationship has been omitted. Figure 2 This is a schematic diagram of the heating power variation curve of a heating device for an aerosol-generating product under static conditions, provided by an embodiment of the present invention. Figure 3 The heating power variation curve of the heating device for an aerosol-generating product under suction and removal states is provided in an embodiment of the present invention, with reference to... Figure 1 The aerosol generating apparatus 100 includes a heating chamber 101, a heating element 103, and a control unit 105. The heating chamber 101 is used to removably accommodate the aerosol generating article 104. The heating element 103 is used to heat the aerosol generating article 104 to generate an aerosol for aspiration. The control unit 105 is configured to use a proportional-integral-derivative (PID) control algorithm to control the heating temperature of the heating element 103 to meet a preset temperature and to cause the heating element 103 to oscillate, thereby ensuring that the heating temperature of the heating element 103 meets the preset temperature; and to determine the operating state of the aerosol generating article 104 based on the changing trend of the operating parameters.

[0042] Specifically, aerosol-generating article 104 refers to a material article that can release inhalable compounds upon heating. Depending on the application, aerosol-generating article 104 can be a material containing pharmaceutical compounds or a material containing tobacco and / or other fragrance substances. Aerosol-generating article 104 may include liquid and / or solid matrices. Preferably, aerosol-generating article 104 uses a solid matrix, wherein the solid matrix may include one or more of the following: vanilla leaves, tobacco leaves, homogenized tobacco, expanded tobacco, powders, granules, fragments, strips, or flakes; the solid matrix may also contain additional tobacco or non-tobacco volatile odor compounds, which can be released when the matrix is ​​heated.

[0043] The heating chamber 101 refers to a receiving structure that provides a relatively enclosed and stable heating space for the aerosol generating article 104. It can removably accommodate the aerosol generating article 104 and, either on its own or through auxiliary mechanisms, can stabilize the position of the aerosol generating article 104, making the heated area of ​​the aerosol generating article 104 more stable. It should be noted that the heating chamber 101 can accommodate either a portion of the aerosol generating article 104 or the entire aerosol generating article 104 within the heating chamber 101. The shape of the heating chamber 101 can be adapted to the shape of the aerosol generating article 104. For example, if the aerosol generating article 104 is cylindrical, the cavity of the heating chamber 101 can also be cylindrical, allowing the aerosol generating article 104 to be adaptably placed within the heating chamber 101.

[0044] The heating device 103 includes a heating component and related circuitry for heating the aerosol-generating article 104. The heating device 103 can employ at least one of several heating principles, such as infrared heating, resistance heating, or electromagnetic induction heating, to heat the aerosol-generating article 104. For example, when the heating device 103 is an infrared heating device, the infrared filament of the heating device 103 can be wound at a predetermined depth within the heating cavity 101 and closely adhered to the inner wall of the heating cavity 101. The winding radius can be approximately 5 mm to 10 mm, and the number of turns can be 5 to 20, forming a hollow structure through which the aerosol-generating article 104 can pass, thereby efficiently and uniformly heating the aerosol-generating article 104.

[0045] Control unit 105 is the control center of the aerosol generating device. Exemplarily, control unit 105 may include a microcontroller chip or a dedicated control chip. Control unit 105 can monitor the heating temperature of heating element 103. Exemplarily, the heating temperature of heating element 103 can be acquired using a temperature sensor 102 disposed on or near heating element 103. Based on the monitoring of the heating temperature, control unit 105 can employ a proportional-integral-derivative (PID) control algorithm to control the heating temperature of heating element 103, for example, to ensure the heating temperature meets a preset temperature and to generate periodic oscillating operating parameters for heating element 103. The output control quantity of the PID control algorithm can be a pulse width modulation signal to control the duty cycle of the power supply line of the heating device 103, thereby causing the heating device 103 to generate periodic oscillating operating parameters. The operating parameters refer to the state parameters related to the heating condition of the heating device 103. For example, the operating parameters may include at least one of the operating voltage, operating current, and heating power. The preset temperature is the target temperature of the heating device 103, which can be determined in advance based on multiple sets of experimental data. The preset temperature can be a single value, a preset range, or a variation according to a preset curve. For example, the preset temperature can be equal to 220°C, or it can be a preset temperature range between 200°C and 300°C, or a preset temperature variation curve.

[0046] The control unit 105 is connected to a temperature sensor and acquires heating temperature sampling data of the heating device 103 from the temperature sensor. Based on the sampling data and the preset temperature, it determines the setpoint of the PID control algorithm. The setpoint and the actual output control quantity of the PID control algorithm constitute the control deviation. The proportional, integral, and derivative of the deviation are linearly combined to determine the output control quantity. The output control quantity is used to control the operating state of the heating device 103.

[0047] For example, the PID control algorithm can adjust at least one of the proportional gain and derivative gain to cause the operating parameters of the heating device 103 to oscillate periodically. Taking power as an example, under stable operation of the aerosol generating device, if the aerosol generating product 104 is normally placed in the heating chamber 101 and not sucked in, the power change curve of the heating device 103 over time is as follows: Figure 2 As shown. Combined with Figure 1 and Figure 2 It should be noted that, under normal operating conditions (the aerosol-generating product 104 is normally placed inside the heating chamber 101 and not drawn in), due to heat accumulation within the heating chamber 101, the peak power of the heating device 103, controlled by the PID control algorithm, will decrease in order to maintain the heating temperature around the preset temperature. Combined with... Figure 1 and Figure 3 Once the aerosol-generated product 104 is removed from the heating chamber 101 or is sucked in, the original heat balance in the heating chamber 101 is broken. The heating device 103 needs to output more energy to stabilize the heating temperature at or above the preset temperature. Then, the next power peak of the heating device 103 controlled by the PID control algorithm will be increased relative to the previous peak.

[0048] Continue to combine Figure 1 and Figure 3 Through extensive experiments and empirical observations, the inventors discovered that different operating states of the aerosol generating product 104 cause different changes in the operating parameters of the heating device 103, such as operating voltage, operating current, and heating power. For example, regarding the power operating parameter, the peak value change and rate of change of the heating power generated by the aerosol generating product 104 under the two different states of suction and removal are quite different. For instance, the peak value increment 1 of the heating power generated by the heating device 103 when the aerosol generating product 104 is suctioned is much smaller than the peak value increment 2 of the heating power generated by the heating device 103 when the aerosol generating product 104 is removed from the heating chamber 101; the rate of change of the peak value of the heating power generated by the heating device 103 when the aerosol generating product 104 is suctioned is much smaller than the rate of change of the peak value of the heating power generated by the heating device 103 when the aerosol generating product 104 is removed from the heating chamber 101. Based on this, the control unit 105 can also determine the operating status of the aerosol generating product 104 according to the changing trend of the operating parameters of the heating device 103, thereby realizing the control assistance of the heating device 103. For example, if it is determined that the aerosol generating product 104 is in a normal working state, the heating device 103 can be controlled to continue heating; if it is determined that the aerosol generating product 104 is in a removed state, the heating device 103 can be controlled to stop heating to prevent the heating device 103 from dry burning, thereby improving energy utilization efficiency and preventing damage to the device from dry burning.

[0049] The aerosol generating apparatus provided in this embodiment includes a heating chamber, a heating element, and a control element. The heating chamber is used to removably contain the aerosol generating product. The heating element is used to heat the aerosol generating product to generate an aerosol for suction. The control unit is configured to use a proportional-integral-derivative (PID) control algorithm to control the heating temperature of the heating element to meet a preset temperature and to cause the heating element to oscillate. It also determines the action state based on the changing trends of the operating parameters, achieving action recognition of the aerosol generating product. The accuracy of recognizing changes using the state parameters of the heating element is high, preventing the device from drying out and extending its lifespan.

[0050] Optionally, based on the foregoing embodiments, refer to... Figure 1The control unit 105 is configured to use at least one of the following: a PID control algorithm with increased proportional coefficient, a PID control algorithm with adjusted integral coefficient, and a PID control algorithm with decreased derivative coefficient, to control the operating parameters of the heating device 103 to generate oscillations, so that the heating temperature of the heating device 103 meets the preset temperature.

[0051] Specifically, the basic PID control algorithm consists of three parts: a proportional operation part, an integral operation part, and a derivative operation part. The proportional operation part adjusts the algorithm output control quantity based on the current error; the integral operation part adjusts the output control quantity based on the accumulated error value to eliminate the steady-state error of the output control quantity; and the derivative operation part adjusts the output control quantity based on the rate of change of the error to suppress output oscillation. To introduce oscillation into the PID control algorithm, thereby causing oscillations in the operating parameters of the heating device 103, this application can adjust at least one of the three PID parameters of the PID control algorithm. For example, based on the PID control algorithm stabilizing the heating temperature of the heating device 103 at a preset temperature and ensuring stable operating parameters, this can be achieved by increasing the edge value of the constraint range of the proportional coefficient in the PID control algorithm and / or decreasing the edge value of the constraint range of the derivative coefficient in the PID control algorithm. The increased proportional coefficient can be greater than the proportional coefficient of the PID control algorithm when the heating temperature of the heating device 103 is stabilized at the preset temperature and the operating parameters are stable, and the decreased derivative coefficient can be less than the derivative coefficient of the PID control algorithm when the heating temperature of the heating device 103 is stabilized at the preset temperature and the operating parameters are stable.

[0052] In the aerosol generating device provided in this embodiment, the control unit is configured to use at least one of the following: a PID control algorithm with increased proportional coefficient, a PID control algorithm with decreased derivative coefficient, and a PID control algorithm with added periodic disturbance. This controls the operating parameters of the heating device to generate oscillations, so that the heating temperature of the heating device meets the preset temperature. This realizes the software adjustment of the operating parameters of the heating device. The disturbance control of the operating parameters is completed by the PID control algorithm with limited computational complexity, avoiding the use of oscillation circuits, greatly improving the simplicity of the circuit and reducing the hardware cost.

[0053] Optionally, based on the foregoing embodiments, refer to... Figure 1 The proportional-integral-derivative (PID) control algorithm is configured as a fuzzy incremental PID control algorithm.

[0054] Specifically, the fuzzy incremental PID control algorithm combines the incremental PID algorithm and fuzzy control logic, dynamically adjusting the proportional coefficient K of the incremental PID through the fuzzy control logic. p Integral coefficient K i and differential coefficient K dThree coefficients are used to adapt to the nonlinear characteristics of the system, control the operating parameters of the heating device 103 so that the heating temperature meets the preset temperature and realizes the operating parameter curve of the oscillation waveform.

[0055] The formula for the incremental PID control algorithm is Δu(k) = K p *[e(k)-e(k-1)]+K i *e(k)

[0056] +K d *[e(k)-2e(k-1)+e(k-2)], where Δu(k) is the increment of the output control quantity; e(k) is the error at the current time, e(k)=T set -T(k), T set Let T(k) be the preset temperature, T(k) be the sensor sample value of the current heating temperature, e(k-1) be the error of the previous moment, and e(k-2) be the error of the moment before the previous moment (the moment before that). The final output control quantity of the incremental PID control algorithm is u(k) = u(k-1) + Δu(k), where u(k-1) is the output control quantity of the previous moment.

[0057] Fuzzy control logic is used to dynamically adjust the proportional coefficient K of the incremental PID control algorithm. p Integral coefficient K i and differential coefficient K d The specific steps for these three coefficients are as follows: First, fuzzification. Convert the error e(k) and the error change rate Δe(k) = e(k) - e(k-1) into fuzzy quantities. Second, design fuzzy rules and adjust the proportional coefficient K according to the error e(k) and the error change rate Δe(k). p Integral coefficient K i and differential coefficient K d These three coefficients, for example, can be increased by increasing the proportionality coefficient K if the error is large and the rate of change of the error is large. p If the error is small and the rate of change of the error is small, then the differential coefficient K can be reduced. d Finally, the fuzzy inference results are converted into a specific proportionality coefficient K. p Integral coefficient K i and differential coefficient K d .

[0058] For example, the control method for the aerosol generation device of the heating device 103 using a fuzzy incremental PID control algorithm may include the following steps:

[0059] Step 1, Initialization. Set the preset temperature T. set Initialize the proportional coefficient K of the PID control algorithm. p Integral coefficient K i and differential coefficient Kd Three coefficients. Initialize the fuzzy rule base. Initialize variables, setting the error of the previous time step e(k-1) = 0, the error of the time step before the previous time step (the time step before that) e(k-2) = 0, and the output control quantity of the previous time step u(k-1) = 0.

[0060] The second step is to control the loop. a) Obtain the sensor sample value T(k) of the current heating temperature; b) Calculate the error e(k) = T set -T(k); c. Calculate the error change rate Δe(k) = e(k) - e(k-1); d. Based on the error e(k) and the error change rate Δe(k), adjust the proportional coefficient K of the incremental PID control algorithm through the fuzzy rule base. p Integral coefficient K i and differential coefficient K d These three coefficients; e. Calculate the increment of the output control quantity Δu(k) = K of the incremental PID control algorithm. p *[e(k)-e(k-1)]+K i *e(k)+K d *[e(k)-2e(k-1)+e(k-2)]; f, calculate the basic output control quantity u(k)=u(k-1)+△u(k) of the incremental PID control algorithm; g, convert the output control quantity into a pulse width modulation signal to control the heating device 103 to heat the aerosol generating product 104; h, update the variables e(k-2)=e(k-1), e(k-1)=e(k) and u(k-1)=u(k); then wait for the next control cycle to arrive and repeat the entire second step.

[0061] The aerosol generation device provided in this embodiment uses a fuzzy incremental integral-derivative control algorithm to precisely control the temperature of the heating device. By adding periodic disturbances or designing a fuzzy rule library, it generates an oscillating waveform heating power curve, realizing a software-based oscillating waveform generation method. Compared with existing switching control and traditional PID control, it has significant advantages in terms of dynamic adaptability, control accuracy, anti-interference ability, and energy saving effect.

[0062] To enable those skilled in the art to better understand the technical solution of this application, the different working stages of the heating device are further explained here from the perspective of practical application.

[0063] In practical applications, the control unit's control phases include a first phase and a second phase, and the preset temperature includes the target temperature and the preset temperature. Specifically: The first phase can be a preheating phase. As used herein, the preheating phase refers to a phase in which the temperature of the aerosol-forming substrate is increased to a temperature that produces a satisfactory amount of aerosol. During the preheating phase, the battery cell of the aerosol generating device provides high power to the heater, thereby rapidly heating the aerosol-forming product to the preset temperature, increasing the temperature of the aerosol-forming substrate to a temperature that produces a satisfactory amount of aerosol. Although the aerosol is generated during the preheating phase, it is generally not inhaled by the user. At the end of the first (preheating) phase, the tobacco stems and the solid tobacco contained therein may have reached the temperature required to release the volatile components contained in the tobacco.

[0064] The first stage can have any suitable duration. The first stage can have a predetermined duration. The duration of the first stage can be equal to or less than one minute. The duration of the first stage can be equal to or less than 45 seconds. The duration of the first stage can be approximately 30 seconds. If the duration of the first stage is approximately 30 seconds, a good balance can be achieved between preheating rate and reduced energy loss. During the first stage, the power supplied to the heater can be gradually increased. The power supplied to the heater can be increased by changing the duty cycle of the power supplied to the heater. During the first stage, the heater can be supplied with maximum power; during the first stage, the heater can be supplied with a fixed power. In the first stage, the power supplied to the heater can depend on the preset temperature set by the controller and the set time.

[0065] When the first stage ends, the second stage (inhalation stage) begins, and the power supplied to the heater is controlled to reduce the heater temperature to a preset temperature below the target temperature. In the second stage, the proportional-integral-derivative (PID) control algorithm is used to control the heating device to maintain the temperature of the aerosol-generating article with a heating power lower than that of the first stage, allowing the aerosol to be generated by the device at a satisfactory rate and inhaled by the user. The preset temperature is within the permissible temperature range. It is generally desirable to reduce the heater temperature in the second stage because after heating the aerosol generating device and raising the temperature of the aerosol-forming substrate for a period of time, at a given heater temperature, aerosol condensation in the device typically decreases and aerosol delivery typically increases. Furthermore, reducing the heater temperature reduces the amount of energy consumed by the aerosol generating device. Moreover, varying the heater temperature during device operation allows for the introduction of a time-modulated gradient preset temperature or a fixed preset temperature into the aerosol-forming substrate.

[0066] In all embodiments of the present invention, the determination of the operational state of the aerosol-generated product is set in the second stage, namely the suction stage. Therefore, optionally, Figure 4 This is a schematic diagram illustrating the state of an aerosol-generated article under a removal state, as provided in an embodiment of the present invention. Figure 5 This is a schematic diagram illustrating the state of an aerosol-generated product under suction conditions, provided in an embodiment of the present invention. Figure 6 This invention provides a measured curve of heating power variation of a heating device, based on the aforementioned embodiments and combined with... Figure 4 The operation states include removal and suction states. The control unit 105 is configured to determine that the aerosol-generating article 104 is in the removal state when the peak increment of the heating power exceeds an increment threshold. Combined with... Figure 5 The control unit 105 is configured to determine that the aerosol generating article 104 is in a suction state when the peak increment of the heating power is greater than 0 and does not exceed the increment threshold.

[0067] Specifically, in combination Figure 4 The removal state, also known as the pull-out state, refers to the state in which the aerosol generating article 104 is removed from the heating chamber 101. Under normal operating conditions of the aerosol generating device, if the aerosol generating article 104 is removed from the heating chamber 101, the heated area on the aerosol generating article 104 is no longer directly aligned with the heating device 103 in the heating chamber 101, resulting in a significant reduction in the heating temperature sampling data of the heating device 103. Multiple sets of experimental data from the inventors show that the removal state reduces the heating temperature sampling data by 2°C to 10°C. Through PID control algorithm regulation, this temperature reduction is reflected in the heating power of the heating device 103 in a corresponding and stable manner. Multiple sets of experimental data from the inventors show that the removal state causes a peak increase in heating power of 50W to 100W; for example, the removal state may cause peak increases in heating power of 55W, 60W, 65W, 67W, 70W, 75W, 80W, 85W, 90W, or 95W.

[0068] Combination Figure 5Similarly, the suction state refers to the state in which the aerosol generating product 104 is drawn away from the heating chamber 101 by the user or suction equipment. In addition to extracting a large amount of aerosol, the suction process also removes a significant amount of heat from the heated area of ​​the aerosol generating product 104, resulting in a substantial decrease in the heating temperature sampling data of the heating device 103. Multiple sets of experimental data from the inventors show that the suction state reduces the heating temperature sampling data by 0.1°C to 1°C. Through PID control algorithm regulation, this temperature reduction is also reflected in the heating power of the heating device 103 in a corresponding and stable manner. Multiple sets of experimental data from the inventors show that the suction state causes a peak increase in heating power of 5W to 30W; for example, the suction state may cause a peak increase in heating power of 10W, 15W, 20W, 22W, or 25W.

[0069] Combination Figure 4 , Figure 5 and Figure 6 The peak increment of heating power refers to the difference between the peak heating power of heating device 103 in the current control interval and the peak heating power in the previous control interval. For example, when the aerosol generating article 104 is in the suction state, the previous peak heating power of heating device 103 was 289W. Since the peak heating power of heating device 103 increases to 311W after the suction operation, the peak increment corresponding to this state is 311-289=22W. When the aerosol generating article 104 is in the removal state, the previous peak heating power of heating device 103 was 292W. Since the heating power of heating device 103 increases to 359W after removal, the peak increment corresponding to this state is 359-292=67W. The increment threshold is a power increment judgment threshold set to identify the operating state of aerosol generating article 104. For example, the increment threshold can be 40W. The operating state of aerosol generating article 104 can be determined based on the relative relationship between the peak increment of heating power and the increment threshold. For example, the control unit 105 can determine that the aerosol generating article 104 is in a removal state when the peak increment of the heating power exceeds 40W. The control unit is configured to determine that the aerosol generating article 104 is in a suction state when the peak increment of the heating power is greater than 0 and does not exceed 40W.

[0070] In the aerosol generating apparatus provided in this embodiment, the control unit is configured to determine that the aerosol-generated product is in a removal state when the peak increment of the heating power exceeds an increment threshold. The control unit is also configured to determine that the aerosol-generated product is in a suction state when the peak increment of the heating power is greater than 0 and does not exceed the increment threshold. This achieves the determination of the aerosol-generated product's operational status. The determination is based on the heating power of the heating device, which varies significantly under different operational states and is easier to distinguish than temperature, greatly improving the accuracy of determining the aerosol-generated product's operational status.

[0071] This invention also provides a control method for an aerosol generating device. Figure 7 This is a flowchart of a control method for an aerosol generating device provided in an embodiment of the present invention. Based on the foregoing embodiments, refer to... Figure 7 A method for controlling an aerosol generating device, including:

[0072] S601: The proportional-integral-derivative control algorithm is used to control the heating temperature of the heating device to meet the preset temperature and to make the heating device oscillate.

[0073] S602. Determine the operational status of aerosol-generated products based on the changing trends of operating parameters.

[0074] The control method for the aerosol generation device provided in this embodiment employs a proportional-integral-derivative (PID) control algorithm to control the oscillating operating parameters of the heating device, ensuring that the heating temperature of the heating device meets the preset temperature. Based on the changing trends of the operating parameters, the operational state of the aerosol-generated product is determined, achieving action recognition of the aerosol-generated product. Using a software-based approach like PID control to achieve parameter oscillation eliminates the need for a dedicated oscillation circuit, simplifying the device's circuit design. Furthermore, the accuracy of identifying changing trends using state parameters is high, preventing the device from drying out and extending its lifespan.

[0075] Figure 8 This is a flowchart of a control method for another aerosol generating device provided in an embodiment of the present invention. Based on the foregoing embodiments, refer to... Figure 8 A method for controlling an aerosol generating device, including:

[0076] S701. Using a proportional-integral-derivative (PID) control algorithm with an increased proportional coefficient and / or a PID control algorithm with a decreased derivative coefficient, the heating temperature of the heating device is controlled to meet the preset temperature and the heating device is made to oscillate.

[0077] S702. If the peak increment of heating power exceeds the increment threshold, it is determined that the aerosol-generated product is in the removal state.

[0078] S703. When the peak increment of heating power is a positive increment and does not exceed the increment threshold, it is determined that the aerosol-generating product is in a suction state.

[0079] S704. When the peak increment of heating power is negative, it is determined that the aerosol-generated product is in a static state.

[0080] Specifically, the static state refers to the aerosol-generated product being placed inside the heating chamber without being drawn in.

[0081] It should be noted that this embodiment determines the state of the aerosol-generated product during the suction stage based on the peak increment of the heating power, and this is not intended to limit the scope of protection. In other embodiments, the state of the aerosol-generated product during the suction stage can also be determined based on data analysis results such as comparisons of the magnitudes of the peak values ​​of at least one of the operating voltage, operating current, and heating power, or comparisons of the peak change rate relative to a threshold.

[0082] The control method for the aerosol generating device provided in this embodiment employs a proportional-integral-derivative (PID) control algorithm that adjusts parameters by increasing the proportional coefficient and / or decreasing the derivative coefficient. This controls the operating parameters of the heating device to generate oscillations, ensuring that the heating temperature of the heating device meets a preset temperature. When the peak increment of the heating power exceeds an increment threshold, the aerosol-generated product is determined to be in a removal state. When the peak increment of the heating power is positive and does not exceed the increment threshold, the aerosol-generated product is determined to be in a suction state. This method achieves the determination of the aerosol-generated product's operating state. The determination is based on the heating power of the heating device, which varies significantly under different operating states and is easier to distinguish than temperature, greatly improving the accuracy of determining the aerosol-generated product's operating state.

[0083] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0084] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An aerosol generating device, characterized in that, include: A heating chamber for removably containing aerosol-generated articles; Heating devices are used to heat aerosol-generating products to generate aerosols for pumping. The control unit is configured to use a proportional-integral-derivative control algorithm to control the heating temperature of the heating device to meet the preset temperature and cause the heating device to oscillate, and to determine the operating state of the aerosol-generated product based on the changing trend of the operating parameters.

2. The aerosol generating apparatus according to claim 1, characterized in that, The control unit is configured to use the proportional-integral-derivative control algorithm with an increased proportional coefficient to control the operating parameters of the heating device to generate oscillations, so that the heating temperature of the heating device meets the preset temperature.

3. The aerosol generating apparatus according to claim 1, characterized in that, The control unit is configured to use the proportional-integral-derivative control algorithm with reduced derivative coefficients to control the operating parameters of the heating device to generate oscillations, so that the heating temperature of the heating device meets the preset temperature.

4. The aerosol generating apparatus according to any one of claims 1-3, characterized in that, The proportional-integral-derivative (PID) control algorithm is configured as a fuzzy incremental PID control algorithm.

5. The aerosol generating apparatus according to any one of claims 1-3, characterized in that, The operating parameters are configured as at least one of operating voltage, operating current, or heating power.

6. The aerosol generating apparatus according to claim 5, characterized in that, The action state includes the removal state; The control unit is configured to determine that the aerosol-generating article is in the removal state when the peak increment of the heating power exceeds the increment threshold.

7. The aerosol generating apparatus according to claim 5, characterized in that, The action states include the suction state; The control unit is configured to determine that the aerosol-generating product is in the suction state when the peak increment of the heating power is a positive increment and does not exceed the increment threshold.

8. The aerosol generating apparatus according to any one of claims 1-3, characterized in that, The control unit is configured to execute a first-stage control process after the device is started; in the first stage, the control unit uses the proportional-integral-derivative control algorithm to control the heating temperature of the heating device to increase to the target temperature. After the heating temperature increases to the target temperature, the control unit executes the second stage of the control process. In the second stage, the control unit uses the proportional-integral-derivative control algorithm to control the heating temperature of the heating device to meet the preset temperature and make the heating device oscillate. It also determines the operating state of the aerosol-generated product based on the changing trend of the operating parameters.

9. A control method for an aerosol generating device, characterized in that, include: The proportional-integral-derivative control algorithm is used to control the heating temperature of the heating device to meet the preset temperature and to make the heating device oscillate. The operational status of the aerosol-generated product is determined based on the changing trends of the operating parameters.

10. The control method for the aerosol generating device according to claim 9, characterized in that, The operating parameters for controlling the heating device to meet the preset temperature and cause oscillation by employing a proportional-integral-derivative control algorithm include: The proportional-integral-derivative (PID) control algorithm with an increased proportional coefficient and / or a decreased derivative proportional coefficient is used to control the heating temperature of the heating device to meet the preset temperature and to cause the heating device to oscillate.

11. The control method for the aerosol generating apparatus according to claim 9 or 10, characterized in that, The step of determining the operational status of the aerosol-generated product based on the changing trends of the operating parameters includes: If the peak increment of heating power exceeds the increment threshold, the aerosol-generated product is determined to be in a removal state.

12. The control method for the aerosol generating apparatus according to claim 9 or 10, characterized in that, The step of determining the operational status of the aerosol-generated product based on the changing trends of the operating parameters includes: If the peak increment of the heating power is a positive increment and does not exceed the increment threshold, the aerosol-generating product is determined to be in a suction state.

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