Aerosol generating device and vaping action detection method therefor

Abstract

The present application discloses an aerosol generating device and a vaping action detection method therefor. The aerosol generating device comprises a heating element for heating an aerosol generating article to generate an aerosol, and the heating element is configured to be inserted into the aerosol generating article for heating. The vaping action detection method comprises: acquiring an energy value supplied to the heating element within each preset time interval; acquiring a first difference between a target temperature and an actual temperature of the heating element at each time interval point; acquiring a calculation result of correspondingly multiplying the first difference by the energy value; and comparing the calculation result with a first preset threshold, and acquiring a comparison result; and if the comparison result is that the calculation result is not less than the first preset threshold, determining that a vaping action has happened. By means of the present application, the accuracy of vaping action detection is effectively improved, and undercounting or miscounting of vaping instances is effectively avoided.

Description

Aerosol-generating device and puffing action detection method thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application No. 202411068777.1 filed on August 5, 2024, and entitled “Aerosol-generating device and puffing action detection method thereof”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of aerosol technology, in particular to an aerosol-generating device and a puffing action detection method thereof. BACKGROUND

[0004] Traditional tobacco products (e.g., cigarettes, cigars, etc.) burn tobacco during use to produce tobacco smoke. The prior art has developed products that release compounds by heating, but not burning, to replace these traditional tobacco products. An example of such products is an aerosol-generating device, which generally comprises a heating element and an aerosol-generating article, which can be a solid tobacco or non-tobacco filler, such as a cigarette, used in conjunction with the aerosol-generating device. When the aerosol-generating article is received in the aerosol-generating device, the heating element heats the aerosol-generating article, causing at least a portion of the active material in the aerosol-generating article to volatilize and produce an aerosol.

[0005] The aerosol-generating device described above generally needs to detect the user's puffing action in order to count the user's puffing number. Currently, the user's puffing action is mainly detected by the duty cycle or energy change of the PID output. However, due to different puffing intensities, the duty cycle or energy change is not obvious when the puffing intensity is light, which can easily lead to missed counting, and further result in inaccurate counting of the puffing number.

[0006] SUMMARY

[0007] The present application provides a puffing action detection method for an aerosol-generating device to solve the technical problem of missed counting of the puffing number when the puffing action is detected by the change of the duty cycle or energy in the prior art.

[0008] At least one embodiment of the present application provides a puffing action detection method for an aerosol-generating device, the aerosol-generating device comprising a heating element for heating an aerosol-generating article to generate an aerosol, the heating element being configured to be inserted into the aerosol-generating article for heating, the puffing action detection method comprising:

[0009] obtaining an energy value provided to the heating element in each preset interval duration;

[0010] obtaining a first difference value between the target temperature and the actual temperature of the heating element at each interval time point;

[0011] obtaining a calculation result of multiplying the first difference value by the energy value;

[0012] comparing the calculation result with a first preset threshold value, and obtaining a comparison result;

[0013] if the comparison result is not less than the first preset threshold value, confirming that the puffing action is generated.

[0014] In one embodiment, the step of obtaining the calculation result of multiplying the first difference value by the energy value specifically comprises:

[0015] amplifying the first difference value and / or the energy value before multiplying them to obtain the calculation result;

[0016] Alternatively, the calculation result of multiplying the first difference value by the energy value is obtained, and then the calculation result is amplified.

[0017] In one embodiment, the step of obtaining the first difference value between the target temperature and the actual temperature of the heating element specifically comprises:

[0018] obtaining a first resistance value change rate of the resistance value of the target temperature of the heating element relative to an initial resistance value;

[0019] obtaining a second resistance value change rate of the resistance value of the actual temperature of the heating element relative to the initial resistance value;

[0020] calculating a difference between the first resistance value change rate and the second resistance value change rate to obtain a second difference value;

[0021] calculating the first difference value based on the second difference value.

[0022] In one embodiment, the step of calculating the difference between the first resistance value change rate and the second resistance value change rate to obtain the second difference value specifically comprises:

[0023] amplifying the first resistance value change rate and the second resistance value change rate by the same multiple, and then taking the difference between the two as the second difference value;

[0024] Alternatively, the difference between the first resistance value change rate and the second resistance value change rate is obtained, and then the difference is amplified, and the amplified difference is taken as the second difference value.

[0025] In one embodiment, the step of calculating the difference between the first resistance value change rate and the second resistance value change rate to obtain the second difference value specifically comprises:

[0026] The second difference is then filtered.

[0027] In one embodiment, the step of filtering the second difference specifically includes:

[0028] First, perform Kalman filtering on the second difference;

[0029] After the Kalman filtering is completed, the second difference is then subjected to smoothing filtering.

[0030] In one embodiment, the method further includes:

[0031] Obtain the voltage and current values ​​of the heating element;

[0032] The resistance of the heating element at the actual temperature is calculated based on the voltage and current values.

[0033] In one embodiment, the method further includes:

[0034] Obtain the cumulative number of starts or the cumulative start-up duration of the aerosol generating device;

[0035] Determine whether the cumulative number of startups or the cumulative startup duration has reached a second preset threshold;

[0036] If the initial resistance value is reached, a feedback signal is generated to remind the user to calibrate the initial resistance value.

[0037] In one embodiment, the aerosol generating apparatus further includes a temperature sensing element for detecting the heating element, and the method further includes:

[0038] Receive the actual temperature of the heating element sent by the temperature sensing element.

[0039] This application also provides an aerosol generating device, including a controller. The controller includes a processor and a memory. The memory stores a computer program. When the processor executes the computer program, it implements the suction action detection method of the aerosol generating device described in the above embodiments.

[0040] The suction action detection method provided in the above embodiments calculates the first difference between the target temperature and the actual temperature, and multiplies the first difference by the corresponding energy value. This reduces the energy fluctuation amplitude when there is no suction, and increases the energy fluctuation amplitude when there is suction, thereby making the suction action more obvious and effectively improving the accuracy of suction action detection. Attached Figure Description

[0041] One or more embodiments are illustrated by way of example in the drawings and are described herein in connection with the embodiments described. These embodiments are described in connection with their respective figures to provide an understanding of the embodiments. The appearances of the reference numerals in the figures indicate the presence of these elements in one or more embodiments. The same reference numerals in different figures indicate the same or similar elements and endless variations and modifications thereto, which are understood by those of ordinary skill in the art.

[0042] FIG. 1 is a schematic diagram of a structure of an aerosol generating device according to an embodiment of the present disclosure;

[0043] FIG. 2 is a schematic diagram of a heating curve of a heating element when there is no puffing;

[0044] FIG. 3 is a schematic diagram of a heating curve of a heating element when there is puffing;

[0045] FIG. 4 is a schematic diagram of a flow of a method of detecting a puffing action of an aerosol generating device according to an embodiment of the present disclosure;

[0046] FIG. 5 is a schematic diagram of a comparison between an energy waveform according to an embodiment of the present disclosure and an energy waveform according to the related art;

[0047] FIG. 6 is a schematic diagram of a flow of a method of detecting a puffing action of an aerosol generating device according to another embodiment of the present disclosure;

[0048] FIG. 7 is a schematic diagram of a hardware structure of a controller of an aerosol generating device according to an embodiment of the present disclosure. Embodiments of the present disclosure

[0049] For the purpose of clarity, the present disclosure will be described in connection with the appended drawings and specific embodiments. It is noted that when an element is referred to as being "on" or "fixed to" another element, it can be directly on or fixed to the other element, or intervening elements can be present therebetween. In addition, when an element is referred to as being "connected" to another element, it can be directly connected to the other element, or intervening elements can be present therebetween. The terms "upper", "lower", "left", "right", "inner", "outer" and similar terms as used herein are for the purpose of illustration only.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0051] Furthermore, the technical features involved in the different embodiments of the present disclosure described below can be combined with each other as long as there is no conflict.

[0052] In the embodiments of the present application, the "mounting" includes welding, screwing, clamping, bonding and the like to fix or limit a certain element or device to a specific position or place, and the element or device can be fixed or limited to the specific position or place to be stationary or movable within a limited range. The element or device fixed or limited to the specific position or place can be disassembled or cannot be disassembled, which is not limited in the embodiments of the present application.

[0053] In addition, the terms "first", "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "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 at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0054] An embodiment of the present application provides an aerosol generating device 100, as shown in FIG. 1, which includes an electric core 10, a main board 20 and a heating element 30. The main board 20 is provided with a controller of the aerosol generating device 100, and the electric core 10 and the heating element 30 are electrically connected to the controller, so that the controller can control the electric core 10 to provide electric energy to the heating element 30. The aerosol generating device 100 is also provided with a longitudinally extending chamber 40, which is used to accommodate an aerosol generating article 200 used with the aerosol generating device 100. The heating element 30 at least partially extends into the chamber 40, and the end of the heating element 30 extending into the chamber 40 is configured in a pin shape or a sheet shape. Further, when the aerosol generating article 200 is accommodated in the chamber 40, the heating element 30 can be inserted into the aerosol generating article 200 for heating. The active substance filled in the aerosol generating article 200 can be volatilized by heat to generate aerosol. The electric core 10 is a power supply of the aerosol generating device 10, which can be a rechargeable electric core or a non-rechargeable electric core.

[0055] The aerosol generating device 100 further includes an airflow passage 50, which communicates the outside air with the chamber 40. When a user sucks the aerosol generating article 200, the external cold air can enter the chamber 40 through the airflow passage, and then enter the aerosol generating article 200 and carry the aerosol in the aerosol generating article 200 to escape for the user to smoke.

[0056] The aerosol-generating article 200 preferably employs a tobacco-containing material that releases volatile compounds from the article upon heating; or can also be a non-tobacco material that is suitable for electrically heated smoking after being heated. The aerosol-generating article 200 preferably employs a solid substrate that can include one or more of a powder, a granule, a shred, a strip, a band, or a sheet of one or more of a tobacco leaf, a reconstituted tobacco, an expanded tobacco; or, the solid substrate can contain additional volatile flavor compounds of tobacco or non-tobacco to be released upon heating of the substrate.

[0057] The heating element 30 can be an electrically resistive heating element, which means that when an electric current is applied to the heating element 30, the electrical resistance in the heating element 30 converts electrical energy into heat energy, which heats the aerosol-generating article 200. The heating element 30 can be in the form of a wire, a mesh, a coil, and / or a plurality of wires. In some embodiments, the heating element 30 can be a thin film heater, such as a resistive thin film heater or an infrared thin film heater.

[0058] The heating element 30 can also be a conductor or a semi-conductor, which can include a metal or a metal alloy. Metals are excellent conductors of electrical and thermal energy. Suitable metals include, but are not limited to, copper, aluminum, platinum, tungsten, gold, silver, and titanium. Suitable metal alloys include, but are not limited to, nickel-chromium alloys and stainless steel.

[0059] As shown in FIG. 2, one heating cycle of the heating element 30 includes a preheating phase and a constant temperature phase. In the preheating phase, that is, the time period of 0-t1 in FIG. 2, the controller controls the power cell 10 to provide a relatively large power to the heating element 30, so that the temperature of the heating element 30 rapidly rises to a target temperature T1 at which the tobacco or non-tobacco solid substrate in the aerosol-generating article 200 is heated to volatilize to produce an aerosol having a better taste.

[0060] When the preheating phase is completed, the aerosol-generating device 100 enters the constant temperature phase, that is, the time period of t1-t2 in FIG. 2. The constant temperature phase is used to maintain the temperature of the heating element 30 at the target temperature T1, that is, to make the temperature of the heating element 30 fluctuate around the target temperature T1. In the constant temperature phase, the user can use the aerosol-generating article 200 for smoking. When the user does not smoke, the controller controls the power cell 10 to provide a relatively small power to the heating element 30 to maintain the temperature of the heating element 30 around the target temperature T1.

[0061] When the user smokes the aerosol generating article 200 in the constant temperature phase, the external cold air enters the aerosol generating article 200 as the user smokes, and thus cools the heating element 30, resulting in a decrease in the temperature of the heating element 30. Accordingly, the controller controls the power supply of the battery 10 to the heating element 30 to be greater, so that the temperature of the heating element 30 rapidly returns to the target temperature T1. As shown in FIG. 3, the temperature of the heating element 30 decreases from the target temperature T1 to T2 due to the smoking at time t3, and then rapidly increases to the target temperature T1.

[0062] In some embodiments, the aerosol generating device 100 further includes a feedback element for providing feedback to the user to indicate that the preheating phase has been completed and the user can start smoking the aerosol generating article 200. The feedback element can be a buzzer or a vibration motor. When the preheating is completed, the controller can control the buzzer to generate a beep or control the vibration motor to generate a vibration, thereby providing feedback information to the user.

[0063] In some embodiments, the controller can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), a single chip microcomputer, an ARM (Acorn RISC Machine), or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, or any combination of these components. In addition, the controller can also be any conventional processor, controller, microcontroller, or state machine. The controller can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP, and / or any other such configuration.

[0064] Based on the above-described aerosol generating device 100, the embodiments of the present application provide a smoking action detection method for the aerosol generating device 100 to accurately detect whether the user smokes the aerosol generating article 200 in the constant temperature phase. As shown in FIG. 4, the smoking action detection method includes:

[0065] S10, obtaining an energy value provided to the heating element in each preset interval;

[0066] S20, obtaining a first difference between the target temperature and the actual temperature of the heating element at each interval time point;

[0067] S30, obtaining a calculation result of the multiplication of the first difference and the energy value;

[0068] S40, comparing the calculation result with a first preset threshold value and obtaining a comparison result; if the comparison result is not less than the first preset threshold value, it is determined that a smoking action is generated.

[0069] In the constant temperature stage, the controller controls the energy provided to the heating element 30 to be calculated once in a preset interval duration. Since the temperature of the heating element 30 will decrease due to the suction, the controller needs to control a larger energy to be provided to the heating element 30 to quickly restore the heating element 30 to the target temperature. Without suction, the controller only needs to control a smaller energy to be provided to the heating element 30 to maintain the temperature of the heating element 30 at the target temperature. Therefore, in the constant temperature stage, the change of the energy can be used to determine whether the suction action is generated.

[0070] The interval duration is too long or too short, which will affect the accuracy of the suction judgment. Therefore, the interval duration needs to be set to an appropriate duration. Preferably, the interval duration can be set to 20 ms. The constant temperature stage is formed by a plurality of interval durations. The controller calculates the energy provided to the heating element 30 in each 20 ms. When the energy calculated in a certain interval duration is greater than a preset threshold, it can be determined that the user uses the aerosol generating article 200 to perform suction in the interval duration.

[0071] The heating element 30 has an actual temperature at each interval time point. When there is no suction, the actual temperature is not much different from the target temperature, and the actual temperature is basically equal to the target temperature. When the user uses the aerosol generating article 200 to perform suction, the external cold air enters the aerosol generating article 200, which causes the temperature of the heating element 30 to decrease. At this time, the actual temperature of the heating element 30 and the target temperature will have a first difference.

[0072] The interval time point is the two time points before and after any interval duration. For example, the interval duration is 20 ms. The first 20 ms, the second 20 ms, the third 20 ms, and the Nth 20 ms are all called interval time points.

[0073] Further, the controller multiplies the energy value calculated in each interval duration with the first difference calculated at each interval time point. Then, the controller compares the multiplication result with a first preset threshold. If the multiplication result is not less than the first preset threshold, the controller confirms that the suction action is generated.

[0074] Corresponding multiplication means that the controller calculates the first difference between the target temperature and the actual temperature of the heating element 30 at the interval time point of the Nth 20 ms, and multiplies the energy provided to the heating element 20 between the N-1th 20 ms and the Nth 20 ms with the first difference.

[0075] By the way provided by the embodiment, when the user does not use the aerosol generating article 200 for suction, the difference between the target temperature and the actual temperature of the heating element 30 is substantially the same, the first difference between the two is small, and after being multiplied by the corresponding energy value, the energy value becomes smaller; when the user uses the aerosol generating article 200 for suction, there is a certain first difference between the target temperature and the actual temperature of the heating element 30, and the first difference multiplied by the corresponding energy value makes the energy value become larger, so that the energy changes more obviously when suction and non-suction, thereby effectively improving the accuracy of suction action detection.

[0076] As shown in FIG. 5, the upper waveform diagram in FIG. 5 is an energy waveform diagram for judging the suction action in the prior art, and the lower waveform diagram in FIG. 5 is an energy waveform diagram for judging the suction action by the method in the embodiment. In the energy waveform diagram in the prior art, when there is no suction, the waveform fluctuates slightly; when there is suction, for example, at t1-t6, the waveform suddenly changes to produce a sharp peak, but the height of the peak is not very high compared with the peak when there is no suction.

[0077] In the energy waveform diagram provided by the embodiment, when there is no suction, the fluctuation amplitude of the waveform is smaller than that in the prior art, and when suction occurs at t1-t6, the fluctuation amplitude of the waveform is obviously larger than that in the prior art, that is, the produced sharp peak is obviously higher than that in the prior art, so that the suction action can be more obviously detected by the energy waveform diagram provided by the embodiment.

[0078] In addition, different suction forces of the user will result in different degrees of temperature reduction of the heating element 30, thereby resulting in different energy provided to the heating element 30. In the prior art, multiple threshold values of different sizes need to be set, and the small threshold value is used to judge light suction, and the large threshold value is used to judge heavy suction. Since the energy value is amplified during suction in the embodiment, the threshold value can be unified, and multiple threshold values need not be set.

[0079] In some embodiments, to further improve the accuracy of suction action detection, the result of the multiplication of the first difference and the energy value is amplified, and a suitable amplification multiple is pre-stored in the controller. The result after amplification is easier to judge whether suction is performed.

[0080] Specifically, the energy value can be amplified after the energy value is calculated, and the first difference remains unchanged; or the first difference can be amplified after the first difference is calculated, and the energy value remains unchanged; or the first difference and the energy value can be amplified at the same time.

[0081] In some embodiments, as shown in FIG. 6, the method for calculating the first difference specifically includes:

[0082] S21, obtaining a first resistance value change rate of the resistance value of the heating element at the target temperature relative to the initial resistance value;

[0083] S22, obtaining a second resistance value change rate of the resistance value of the heating element at the actual temperature relative to the initial resistance value;

[0084] S23, calculating a difference between the first resistance value change rate and the second resistance value change rate to obtain a second difference value;

[0085] S24, calculating the first difference value based on the second difference value.

[0086] The heating element 30 has a TCR characteristic (temperature coefficient of resistance) due to the resistance heating mode, that is, the relative change of the resistance value of the heating element 30 per unit temperature change, that is, as the temperature of the heating element 30 rises or falls, the resistance value also changes accordingly.

[0087] The TCR has the following definition formula:

[0088] TCR = (R2 - R1) / R1 (Ta - Tb) (1)

[0089] Wherein, R1 is the resistance value of the heating element 30 at temperature Ta, R2 is the resistance value of the heating element 30 at temperature Tb, Tb is the ambient temperature value which can be set to 26°C, R1 is the initial resistance value of the heating element 30 at ambient temperature, and TCR is the inherent value of the heating element 30. Different resistance heating materials have different TCR values, so according to the above TCR definition formula, when the resistance value R2 is known, the resistance value of the heating element 30 at temperature Ta can be calculated, and therefore the controller can control the temperature of the heating element 30 based on the TCR characteristic of the heating element 30 to make the heating element 30 heat according to the preset heating curve.

[0090] The initial resistance value R1 of the heating element 30 can be calibrated during the production stage. During the production stage, the control electric core 10 provides power to the heating element 30 to start heating, and the actual temperature of the heating element 30 is measured in real time by an external temperature measuring device (such as an infrared tester), and then the temperature of the heating element 30 is raised to the target temperature T1 described above. The target temperature is usually a temperature preset in the aerosol generating device 100 by software, and the preset temperature can be set according to the specific aerosol generating product 200 and aerosol generating device 100.

[0091] The formula (1) is transformed to obtain R1 = R2 / (TCR * (Ta - Tb) + 1), Tb is the initial temperature set to 26℃, Ta is the known target temperature T1, R2 is the resistance value corresponding to the target temperature T1, R2 can be calculated according to the voltage value and current value provided to the heating element 30 at the target temperature T1, TCR is the inherent value of the heating element 30, and then the initial resistance R1 can be obtained. The initial resistance R1 and the resistance R2 corresponding to the target temperature T1 can be written into the controller through software.

[0092] The formula (1) is transformed to obtain formula (2)

[0093] TCR * (Ta - Tb) = (R2 - R1) / R1 (2)

[0094] According to formula (2), when Ta is the target temperature T1, R2 is the resistance value of the heating element 30 at the target temperature T1. Since the initial resistance R1 and the resistance R2 corresponding to the target temperature T1 are stored in the controller, the controller can directly obtain the initial resistance R1 and the resistance R2 corresponding to the target temperature T1. Therefore, the controller can calculate the value of (R2 - R1) / R1, which is the first resistance change rate of the heating element 30 at the target temperature T1 relative to the initial resistance R1.

[0095] Similarly, when Ta is the actual temperature Tc, for example, the temperature decreases to the actual temperature T2 due to smoking, R2 is the resistance value corresponding to the actual temperature T2 of the heating element 30. The resistance value corresponding to the actual temperature of the heating element 30 is calculated by the current voltage and the current flowing through the heating element 30. The controller calculates R2 and further calculates (R2 - R1) / R1. (R2 - R1) / R1 is the second resistance change rate of the heating element 30 at the actual temperature T2 relative to the initial resistance R1.

[0096] The controller further calculates the difference between the first resistance change rate and the second resistance change rate to obtain a second difference value. According to the above formula, the first resistance change rate is TCR * (T1 - Tb), and the second resistance change rate is TCR * (T2 - Tb). The first resistance change rate minus the second resistance change rate is TCR * (T1 - T2). Since TCR is a fixed value, (T1 - T2) can be calculated according to the second difference value and TCR, that is, the temperature drop value of the heating element 30 from the target temperature T1 to the actual temperature T2 after smoking, that is, the first difference value. It is easy to understand that when the user does not smoke, the difference between the target temperature T1 and the actual temperature Tc when there is no smoking can also be calculated.

[0097] In some embodiments, the above-mentioned puffing action detection method further comprises:

[0098] The first resistance change rate and the second resistance change rate are first amplified by the same multiple, and a difference between the two is taken as the second difference.

[0099] As can be seen from equation (2), when the resistance change rate on the right side of the equation is amplified, to ensure that both sides of the equation are equal, the left side of the equation also needs to be amplified by the same multiple. For example, if the resistance change rate on the right side of the equation is amplified by A times, equation (2) is equivalent to the following equation:

[0100] A*TCR*(Ta-Tb)= A* (R2-R1) / R1 (3)

[0101] When the first resistance change rate and the second resistance change rate are amplified by the same multiple, the second difference between the first resistance change rate and the second resistance change rate becomes A*TCR*(T1-Tc), that is, the first difference between the target temperature T1 of the heating element 30 and the actual temperature Tc is amplified by A times. Since the TCR value is usually small, A can be set to be relatively large, for example, 10000 times, 20000 times or larger. In this way, after multiplication with the corresponding energy value, the energy value can be more obviously distinguished between the puffing and non-puffing, which is beneficial to improving the accuracy of the puffing action detection.

[0102] Alternatively, in some embodiments, the difference between the first resistance change rate and the second resistance change rate can be calculated first, and then the calculated difference is amplified, and the amplified difference is taken as the second difference.

[0103] To eliminate the influence of external factors on the second difference, in some embodiments, the above-mentioned puffing action detection method further comprises:

[0104] The second difference is filtered.

[0105] Specifically, the storage unit of the controller stores a filtering program. When the controller calculates the second difference, the controller filters the calculated second difference through the filtering program to suppress the influence of external factors on the second difference, so as to avoid misjudgment of the detection of the puffing action due to external factors.

[0106] In addition, in some embodiments, to improve the filtering effect, the second difference is first subjected to Kalman filtering, and after the Kalman filtering is completed, the second difference is subjected to smoothing filtering. The smoothing filtering method can be any one or several of arithmetic average filtering method, recursive average filtering method, weighted moving average filtering method, median filtering, Gaussian filtering, bilateral filtering, etc.

[0107] In some embodiments, the aerosol generating device 100 is further provided with a temperature sensing element (not shown in the figure), which is electrically connected to the controller and is used to detect the actual temperature of the heating element 30 and send the actual temperature to the controller. The temperature sensing element can be any one of a thermocouple, a thermistor, a semiconductor-based temperature sensor, etc. The puffing action detection method further includes:

[0108] receiving the actual temperature of the heating element sent by the temperature sensing element.

[0109] The controller directly obtains the actual temperature of the heating element 30 through the temperature sensing element, calculates the first difference value between the target temperature and the actual temperature, and then multiplies the first difference value by the corresponding energy value, without the need to calculate the first difference value by calculating the second difference value.

[0110] In some embodiments, the puffing action detection method further includes:

[0111] obtaining the cumulative start-up number of the aerosol generating device;

[0112] determining whether the cumulative start-up number reaches a second preset threshold value;

[0113] If so, a feedback signal is generated to remind the calibration of the initial resistance value.

[0114] With the increasing use of the heating element 30, the initial resistance value of the heating element 30 will change, and the change of the initial resistance value will further affect the first resistance change rate and the second resistance change rate, thereby affecting the accuracy of the puffing action detection. Therefore, it is necessary to regularly calibrate the initial resistance value.

[0115] Specifically, the controller can accumulate the start-up number of the aerosol generating device 100. The aerosol generating device 100 starts up and the heating element 30 completes a heating cycle, and the controller will accumulate the start-up. If the aerosol generating device 100 is only started up, but the heating element 30 does not heat, the controller does not accumulate the start-up. At the same time, a second preset threshold value is set in the controller. The second preset threshold value is a preset start-up number. When the accumulated start-up number reaches the second preset threshold value, the controller generates a feedback signal to remind the user to calibrate the initial resistance value. The user can send the aerosol generating device 100 to the after-sales service point of the aerosol generating device 100 to calibrate the initial resistance value by the technical personnel.

[0116] The aerosol-generating device 100 can be provided with a display screen, and when the accumulated number of start-ups reaches the second preset threshold, the controller controls the display screen to feed back the confidence in calibrating the initial resistance value to the user in the form of text. Alternatively, the aerosol-generating device 100 can be provided with a display lamp, and the controller controls the display lamp to remind the user to calibrate the initial resistance value by controlling the display color of the display lamp. Alternatively, the aerosol-generating device 100 is provided with a loudspeaker, and the controller controls the loudspeaker to remind the user to calibrate the initial resistance value in the form of voice.

[0117] Further, as shown in FIG. 7, the controller includes at least one processor, and a memory connected in communication with the at least one processor, and FIG. 7 takes one processor as an example. The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the control method of the above embodiments. The processor and the memory can be connected by a bus or other means, and FIG. 7 takes the connection by the bus as an example.

[0118] The processor can be implemented by using at least one of an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a processor, a controller, a microcontroller, a microprocessor, and other electronic units performing these functions.

[0119] The memory includes a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state memory device. In some embodiments, the memory can optionally include a memory disposed remotely with respect to the processor, and these remote memories can be connected to the aerosol-generating appliance through a network. Examples of the above network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0120] The memory is used to store non-volatile software programs, non-volatile computer executable programs and modules, such as the program instructions / units corresponding to the control method / device as described herein. The processor performs various functional applications and data processing of the aerosol-generating appliance by running the non-volatile software programs, instructions and units stored in the memory, i.e. implements the puffing action detection method as described in the above embodiments.

[0121] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; under the idea of the present application, the technical features in the above examples or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for simplicity; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A puff action detection method of an aerosol generating device, the aerosol generating device including a heating element for heating an aerosol generating article to generate an aerosol, the heating element being configured to be inserted into the aerosol generating article for heating, characterized in that, The puffing action detection method comprises: obtaining an energy value provided to the heating element in each preset interval; obtaining a first difference between the target temperature and the actual temperature of the heating element at each interval time point; obtaining a calculation result of the first difference multiplied by the energy value; comparing the calculation result with a first preset threshold, and obtaining a comparison result; if the comparison result is not less than the first preset threshold, it is determined that a puffing action is generated.

2. The puffing action detection method according to claim 1, characterized by, The step of obtaining the calculation result of the first difference multiplied by the energy value comprises: amplifying the first difference and / or the energy value before multiplication to obtain the calculation result; or, obtaining the calculation result of the first difference multiplied by the energy value, and then amplifying the calculation result.

3. The puffing action detection method according to claim 1, characterized by, The step of obtaining the first difference between the target temperature and the actual temperature of the heating element comprises: obtaining a first resistance value change rate of the resistance value of the target temperature of the heating element relative to an initial resistance value; obtaining a second resistance value change rate of the resistance value of the actual temperature of the heating element relative to the initial resistance value; calculating the difference between the first resistance value change rate and the second resistance value change rate to obtain a second difference; calculating the first difference based on the second difference.

4. The puffing action detection method according to claim 3, characterized by, In the step of calculating the difference between the first resistance value change rate and the second resistance value change rate to obtain a second difference, the step comprises: amplifying the first resistance value change rate and the second resistance value change rate by the same multiple, and then taking the difference between the two as the second difference; or, obtaining the difference between the first resistance value change rate and the second resistance value change rate, and then amplifying the difference, and taking the amplified difference as the second difference.

5. The puffing action detection method according to claim 3, characterized by, The step of calculating the difference between the first resistance value change rate and the second resistance value change rate to obtain a second difference comprises: filtering the second difference.

6. The puffing action detection method according to claim 5, characterized by, The step of filtering the second difference comprises: firstly performing Kalman filtering on the second difference; after the Kalman filtering, performing smoothing filtering on the second difference.

7. The puffing action detection method according to claim 3, wherein The method further comprises: obtaining a voltage value and a current value of the heating element; calculating the resistance value of the heating element at the actual temperature based on the voltage value and the current value.

8. The puffing action detection method according to claim 3, characterized by, The method further comprises: obtaining the cumulative start-up times or the cumulative start-up duration of the aerosol generating device; determining whether the cumulative start-up times or the cumulative start-up duration reaches a second preset threshold; if so, controlling a feedback signal to be generated to remind calibration of the initial resistance value.

9. The puffing action detection method according to claim 1, wherein The aerosol generating device further comprises a temperature sensing element for detecting the temperature of the heating element, and the method further comprises: receiving the actual temperature of the heating element sent by the temperature sensing element.

10. An aerosol-generating device comprising a controller, characterised in that, The controller comprises a processor and a memory, the memory stores a computer program, and the processor implements the puffing action detection method of the aerosol generating device according to any one of claims 1-9 when executing the computer program.

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