Aerosol generating device and control method

Abstract

An aerosol generating device and a control method, in which the aerosol generating device is used to receive and heat an aerosol-generating product to generate a smoking aerosol. The aerosol generating device includes a heater (30) configured to heat the aerosol-generating product, a battery cell (10) for supplying power, and a controller configured to control the power supplied from the battery cell (10) to the heater (30) so that the actual temperature of the heater (30) meets a preset temperature when the aerosol generating device is in operation, the controller is further configured to obtain a change in the power and / or voltage and / or current supplied from the battery cell (10) to the heater (30), determine an event of removal of the aerosol-generating product from the aerosol generating device, and stop supplying power to the heater (30) in response to the removal event. The aerosol generating device can monitor the removal of the aerosol-generating product from the aerosol generating device during heating, and prevent dry-burning after the product is removed.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application claims priority from a prior application, application number 202111376087.9, filed with the State Intellectual Property Office of China on November 19, 2021, entitled "Aerosol Generating Apparatus and Control Method," the contents of which are incorporated herein by reference.

[0002] The embodiments of the present application relate to the technical field of heated non-combustion smoking devices, and in particular to an aerosol generating device and a control method. [Background technology]

[0003] Tobacco products (e.g., cigarettes, cigars, etc.) burn tobacco to produce tobacco smoke during use. As an alternative to these combustible tobacco products, efforts have been made to produce products that release compounds without combustion.

[0004] One example of such a product is a heating device, which releases compounds by heating, rather than burning, a material. For example, the material can be tobacco or other non-tobacco products, which may or may not contain nicotine. The heating process of a tobacco product using known heating devices is carried out according to a temperature curve with a predetermined time set in a controller. However, during use, a user may remove the tobacco product from the heating device before the predetermined heating time is completed, causing the heating device to empty without the tobacco product. Summary of the Invention

[0005] One embodiment of the present application is an aerosol generating device for receiving and heating an aerosol-generating product to generate a smoking aerosol, comprising: a heater configured to heat the aerosol-generating product; a battery cell for supplying power; and a controller configured to control the power supplied from the battery cell to the heater so as to maintain the actual temperature of the heater at a preset temperature, the controller further configured to monitor the power supplied from the battery cell to the heater and determine the removal of an aerosol-generating product from the aerosol-generating device.

[0006] A further embodiment of the present application is a method of controlling an aerosol generating device for receiving and heating an aerosol-generating product to generate a smoking aerosol, said aerosol generating device comprising: a heater configured to heat the aerosol-generating product; and a battery cell for supplying power, the method comprising: outputting power to the heater so that the actual temperature of the heater meets a preset temperature; obtaining real-time values ​​of electrical characteristic parameters of the heater; determining a removal event of the aerosol-generating product from the aerosol-generating device based on the real-time value of the electrical characteristic parameter; and ceasing power output to the heater in response to the removal event.

[0007] The aerosol generating device monitors the removal of the aerosol-generating product from the aerosol generating device during heating, and can prevent the aerosol generating device from running empty after the product is removed. [Brief explanation of the drawings]

[0008] One or more embodiments are illustratively described in the accompanying drawing figures corresponding thereto; these illustrative descriptions are not intended to be limiting of the embodiments; elements in the drawings having the same reference numerals are like elements; and unless otherwise specified, the figures in the accompanying drawings are not to scale. [Figure 1]1 is a schematic diagram of an aerosol generating device provided in one embodiment. [Figure 2] FIG. 2 is a schematic diagram of a heating curve over a predetermined time period of an aerosol generating device in one embodiment. [Figure 3] 1 is a plot of the available voltage output by a battery cell during heating when an aerosol-generating product is received in an aerosol-generating device and when no aerosol-generating product is received in an embodiment; [Figure 4] 1 is a plot of the available voltage output by a battery cell after the aerosol-generating product is removed from the aerosol-generating device before a predetermined time has elapsed in one embodiment. [Figure 5] FIG. 1 is a schematic diagram of a method for controlling an aerosol generating device provided in one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] To facilitate understanding of the present application, the present application will now be described in more detail in connection with the drawings and specific embodiments.

[0010] One embodiment of the present application provides an aerosol generating device, the structure of which can be seen in FIG. 1 : a cavity in which an aerosol-generating product A is removably received; The device further includes a heater 30 extending at least partially within the cavity, the heater 30 further heating an aerosol-generating product A, such as a cigarette, to volatilize at least one component of the aerosol-generating product A and form a smoking aerosol.

[0011] In some embodiments, the heater 30 is a resistive heater 30 or an electromagnetic induction heater 30 that generates heat when penetrated by a changing magnetic field.

[0012] FIG. 1 shows a schematic diagram of an electromagnetic induction heater 30 aerosol generating device, which further includes a magnetic field generator such as an induction coil 50 , a battery cell 10 , and circuitry 20 . A magnetic field generator such as an induction coil 50 is used to generate a magnetic field that changes with an alternating current, and the heater 30 is configured to be inductively coupled with the induction coil 50 and penetrated by the changing magnetic field to generate heat. The battery cell 10 is a rechargeable DC battery cell that can output a DC current. The circuit 20 is used to convert the direct current output from the rechargeable battery cell 10 into an alternating current having an appropriate frequency and then supply it to the induction coil 50 by being appropriately electrically connected to the battery cell 10.

[0013] Furthermore, in alternative embodiments, aerosol-generating product A preferably employs a tobacco-containing material that releases volatile compounds from the substrate upon heating, or may be a non-tobacco material that may be suitable for electrically heated smoking after heating. Aerosol-generating product A preferably employs a solid substrate that may comprise one or more of the following powders, granules, strips, strips, or flakes: vanilla leaf, tobacco leaf, homogenized tobacco, expanded tobacco, or the solid substrate may contain additional tobacco or non-tobacco volatile flavor compounds to be released upon heating of the substrate.

[0014] Depending on the configuration of use of the product, the induction coil 50 may include a solenoidally wound inductor coil, as shown in FIG. 1. The solenoidally wound induction coil 50 may have a radius r within about 5 mm to about 10 mm, and in particular, the radius r may be about 7 mm. The length of the helically wound cylindrical induction coil 50 may be within a range of about 8 mm to about 14 mm, and the number of turns of the induction coil 50 may be within a range of about 8 turns to about 15 turns. Accordingly, the internal volume is about 0.15 cm. 3 Approximately 1.10 cm 3 The range may be:

[0015] In a more preferred embodiment, the frequency of the alternating current supplied by the circuit 20 to the induction coil 50 is between 80 KHz and 500 KHz, and more specifically, the frequency may be in the range of about 200 KHz to 300 KHz.

[0016] In a preferred embodiment, the DC power supply voltage provided by the battery cell 10 is in the range of about 2.5V to about 9.0V, and the DC current amperage provided by the battery cell 10 is in the range of about 2.5A to about 20A.

[0017] In a preferred embodiment, the heater 30 is generally pin-, needle-, rod-, or blade-shaped, which facilitates insertion into the aerosol-generating product A. The heater 30 may have a length of approximately 12 millimeters, a width of approximately 4 millimeters, and a thickness of approximately 0.5 millimeters, and may be manufactured from grade 430 stainless steel (SS430). Alternatively, the heater 30 may have a length of approximately 12 millimeters, a width of approximately 5 millimeters, and a thickness of approximately 0.5 millimeters, and may be manufactured from grade 430 stainless steel (SS430). In another variant, the heater 30 may be cylindrical or tubular. In use, its interior space forms a cavity for receiving the aerosol-generating product A, and generates a smoking aerosol by heating the outer periphery of the aerosol-generating product A. These heaters 30 may also be manufactured from grade 420 stainless steel (SS420) and iron / nickel-containing alloy materials (e.g., Permalloy).

[0018] 1, the aerosol generating device further includes a holder 40 for arranging the induction coil 50 and the heater 30, and the holder 40 may be made of a non-metallic material that can withstand high temperatures, such as PEEK or ceramic. In practice, the induction coil 50 is wound around and fixed to the outer wall of the holder 40. As shown in FIG. 1, the holder 40 has a hollow tubular shape, and the space in the hollow tubular portion forms the cavity for receiving the aerosol-generating product A.

[0019] In an alternative embodiment, heater 30 is fabricated from the above-mentioned susceptible materials or comprises a susceptible material coating formed by electroplating, deposition, or the like on the exterior surface of a heat-resistant substrate material, such as a non-susceptible ceramic.

[0020] In some embodiments, the induction coil 50 is made of a low resistivity metal or alloy material, such as gold, silver, copper, or alloys thereof. In some preferred embodiments, the wire material of the induction coil 50 is made of Litz wire or Litz cable. In Litz material, the wire or cable is made from individual insulated wires bound together by, for example, winding or braiding, multiple or multiple strands of conductive thread. Litz material is particularly suitable for carrying alternating current. The individual wires are designed to reduce conductor surface and near-field effect losses at high frequencies, and the interior of the wire material of the induction coil 50 can contribute to the conductivity of the induction coil 50.

[0021] In some embodiments, the circuit 20 may include a controller. The controller may include a microprocessor, which may be a programmable microprocessor. The controller may include other electronic components. The controller may be configured to adjust the power supplied to the induction coil 50 to generate a varying magnetic field in the induction coil 50.

[0022] In some embodiments, the varying magnetic field generated by induction coil 50 may be supplied to heater 30 continuously after device activation, or may be supplied intermittently, such as every other time. The varying magnetic field is supplied to heater 30 in the form of pulses.

[0023] In some embodiments, the power supplied to the induction coil 50 may be triggered by a smoking detection system. Alternatively, the power supplied to the induction coil 50 may be triggered by pressing an on / off button to maintain the duration of the user's smoking. The smoking detection system may be provided as a sensor and may be configured as an airflow sensor capable of measuring airflow velocity. Airflow velocity is a parameter that characterizes the amount of air a user inhales each time through the airflow path of the aerosol generating device. When the airflow exceeds a predetermined threshold, the airflow sensor can detect the onset of smoking. The onset of smoking can also be detected when a user activates a button. The sensor may be configured as a pressure sensor that measures the pressure of the air within the aerosol generating device as it is inhaled by the user through the airflow path of the device during smoking.

[0024] In some embodiments, the heater 30 of the aerosol generating device heats the aerosol-generating product A according to a given heating curve. During the heating process, the circuit 20 controls the output power of the battery cell 10 so that the actual temperature of the heater 30 matches a preset temperature on the heating curve or is within a preset temperature variation range. Specifically, the heating curve is within a predetermined time period, and the predetermined time period is set based on the amount of aerosol that the aerosol-generating product A can generate and the user's preferred smoking duration (e.g., 4 minutes).

[0025] For example, Figure 2 shows a schematic diagram of a typical heating curve for heating aerosol-generating product A in a specific embodiment. Based on the heating curve, the heating process includes the following pre-heating stage S1, cooling stage S2, and smoking stage S3. In the preheating step S1, the temperature is rapidly increased from room temperature to a first preset temperature T1 within t1. In the temperature decreasing step S2, the temperature is decreased from the first preset temperature T1 to the second preset temperature T2 within a time period t2. In the smoking stage S3, the heating temperature is maintained substantially at the second preset temperature T2 until the end of the time t3, the aerosol-generating product A is stably heated at the second preset temperature T2, a smoking aerosol is generated, and after smoking is completed, the power supply to the heater 30 is stopped to allow the heater 30 to cool naturally.

[0026] In other alternative embodiments, the heating curve may have more temperature change modes or more temperature rise and fall steps.

[0027] 3 shows the curves of the effective voltage output by the battery cell during heating when an aerosol-generating product is received in the aerosol-generating device and when no aerosol-generating product is received in the aerosol-generating device in one embodiment. As shown in FIG. 3, when the aerosol-generating device controls the heating of heater 30 according to a given heating curve when aerosol-generating product A is received, most of the generated heat is received by aerosol-generating product A, and the heating process needs to compensate for the temperature drop caused by the user smoking. Therefore, when aerosol-generating product A is received, the effective voltage during heating is greater than when aerosol-generating product A is not received.

[0028] It should be clarified that the phrase "aerosol-generating product A is received in the aerosol-generating device" means that the described aerosol-generating product A is contained in the cavity to a predetermined length. Correspondingly, the phrase "aerosol-generating product A is not received in the aerosol-generating device" includes cases where the described aerosol-generating product A is not received in its entirety in the cavity of the aerosol-generating device, or where a portion of the described aerosol-generating product A is received in the cavity but the length within the cavity is shorter than the predetermined length.

[0029] 4 shows a curve of the effective voltage output to the heater 30 when the aerosol-generating product is removed from the aerosol-generating device before the predetermined time in one embodiment. As shown in FIG. 4, if aerosol-generating product A is removed from the aerosol-generating device at time t11 before the predetermined time in one embodiment due to nonstandard or incorrect operation by the user, the effective voltage provided by the battery cell 10 after time t11 drops significantly compared to when aerosol-generating product A was inserted, and there is a difference ΔP between the effective voltage required for heating when aerosol-generating product A was inserted. In this embodiment, the preset temperature during the smoking phase remains almost unchanged, and further, after aerosol-generating product A is removed from the aerosol-generating device at time t11, the effective voltage supplied to the heater 30 remains almost constant because the temperature of the heater 30 does not decrease due to the user's smoking.

[0030] Similarly, in FIG. 4, the effective voltage value V of the AC supplied to the induction coil 50 rms The change in the power supplied to the heater 30 is measured by sampling the change in the voltage or current. Alternatively, in another modified embodiment, in the case of a different heating mode, for example, when direct current is directly supplied to the resistance heater 30 using a control modulation method such as PWM (pulse width modulation) or PFM (pulse frequency modulation), the change in the power supplied to the heater 30 can be measured by monitoring the pulse width or pulse frequency corresponding to the voltage or current in the selected control method. Alternatively, in some other embodiments, the change curve of the power output from the battery cell 10 to the heater 30 during the heating process can be directly monitored to determine the change in power and power when the aerosol-generating product A is removed and when it is not, and the general shape of the power curve is similar to the effective voltage curves in FIGS. 3 and 4.

[0031] Based on the above, in one embodiment of the present application, circuit 20 comprises: The removal of the aerosol-generating product A from the aerosol-generating device is determined based on the power supplied from the battery cell 10 to the heater 30 .

[0032] It should be clarified that the phrase "removing aerosol-generating product A from the aerosol-generating device" includes the aerosol-generating product A being completely removed from the cavity of the aerosol-generating device, or the predetermined length received in the cavity being moved a certain distance outside the cavity, thereby causing the length received in the cavity to become smaller than the predetermined length.

[0033] Furthermore, circuit 20 is configured to stop / prevent power supply to heater 30 when it is determined that aerosol-generating product A has been removed, thereby preventing heater 30 from running dry.

[0034] In one specific embodiment, circuit 20 is configured to determine that aerosol-generating product A has been removed based on the power supplied to heater 30 being equal to or less than a minimum threshold. For example, as shown in Figure 4, the heating power curve after aerosol-generating product A has been removed is set as a minimum threshold, and when the power supplied to heater 30 is equal to or less than the minimum threshold, it is determined that aerosol-generating product A has been removed.

[0035] In some specific embodiments, a commonly used standard single 3.7V battery cell 10 (e.g., a model 08570P 3.7V 280mAh battery cell) outputs a pulse voltage at a frequency of 200-300KHz to a series LC oscillator consisting of a capacitor C and an induction coil 50, causing the LC oscillator to oscillate and generate an AC current. When a pre-set temperature of 320°C is set, a heater 30 made of 1J85 permalloy material is used to heat an aerosol-generating product A having a typical outer diameter of 5.4mm. When the aerosol-generating product A is removed, the effective voltage V applied to the induction coil 50 is rms The voltage drops instantaneously (for example, within 1 second) from about 2000 mV to below 1500 mV, a drop of about 500 mV, a drop of about 25%.

[0036] In the specific embodiment described above, a 25% decrease in the preset power / effective voltage can be set as the preset threshold, and when the 25% decrease is exceeded, the aerosol-generating product A can be deemed to have been removed. Alternatively, in a more accurate implementation, a 20% decrease in the preset power / effective voltage can be set as the preset threshold, which can result in more accurate judgment. Alternatively, more preferably, a 15% decrease in the preset power / effective voltage can be set as the preset threshold.

[0037] Furthermore, in different implementations, the selection of the preset threshold value needs to be adjusted correspondingly.

[0038] For example, if the heating curve of the aerosol-generating device adopts a preset temperature curve, such as 350°C, 380°C, or higher, the preset power to maintain the higher temperature will be increased accordingly. Accordingly, when the aerosol-generating product A is removed, the power or effective voltage value V at the moment of removal (e.g., within 1 s) will be rms The drop in power / effective voltage is low, and a drop of 10% of the preset power / effective voltage can be set as a preset threshold.

[0039] Furthermore, based on the above-mentioned various electromagnetic, resistance, microwave or infrared heating methods and the differences in the specific structure of the circuit 20, it is easy for an engineer to measure the extent of power reduction due to the removal of the aerosol-generating product A in a specific implementation and reasonably set the above-mentioned preset threshold value based on the measurement value.

[0040] Alternatively, in another alternative embodiment, circuit 20 is configured to determine that aerosol-generating product A has been removed based on a difference ΔP between the power supplied to heater 30 and a preset threshold. As shown in Figure 4, the heating power curve when aerosol-generating product A is received is set to a preset threshold, and when the difference ΔP between the supplied power and the preset threshold exceeds a preset width (which is a negative value), it indicates that aerosol-generating product A has been removed.

[0041] Alternatively, in another specific embodiment, circuit 20 is configured to determine that aerosol-generating product A has been removed based on the amount or rate of change in the power supplied to heater 30 over a preset time period. For example, in FIG. 4 , the preset time period from time t10 to time t12 is selected during the heating process, and the amount or rate of change in the power supplied to heater 30 when aerosol-generating product A is not removed is lower than the amount or rate of change in the power when aerosol-generating product A is removed. Similarly, circuit 20 is configured to determine that aerosol-generating product A has been removed based on the amount or rate of change in the power supplied to heater 30 over a preset time period being greater than a maximum threshold.

[0042] It should be clarified that the phrase "the amount or rate of change of the power supplied to the heater 30 over a predetermined period of time is greater than the maximum threshold" includes cases where the amount or rate of change reaches the maximum threshold earlier or faster than the predetermined period of time. In some alternative embodiments, the predetermined period of time may be, for example, 50 to 200 ms, or 80 to 200 ms, etc. Or, in some preferred embodiments, the predetermined period of time is 50 to 150 ms.

[0043] A more accurate threshold can be set by determining whether the aerosol-generating product A has been removed based on the power supplied to the heater 30. The power supplied to the heater 30 is independent of variations in the size and shape of the heater 30 due to manufacturing tolerances.

[0044] Based on the electromagnetic induction heating method described above, in practice, the power supplied to the heater 30 can be determined by monitoring the eddy current loss that occurs during induction heating of the heater 30.

[0045] Furthermore, in some common implementations, the alternating current supplied to the induction coil 50 is formed in the process of oscillation of an LC oscillator (which may be connected in series or parallel) consisting of the capacitor C and the induction coil 50, and the oscillation of the LC oscillator is driven by the voltage pulses provided by the battery cell 10. Therefore, the power supplied to the heater 30 can be determined by monitoring the pulse width and / or frequency of the voltage pulses provided by the battery cell 10, which is easier than determining the power supplied by monitoring the eddy current loss.

[0046] Furthermore, in a more preferred embodiment, the power supplied to the heater 30 is realized by the induction coil 50 generating a magnetic field that changes due to the alternating current supplied to the induction coil 50. Therefore, the effective voltage value V rms By monitoring the eddy current losses, the power supplied to the heater 30 can be determined, which is easier than determining the power supplied by monitoring the eddy current losses. Alternatively, in some alternative embodiments, the circuit 20 determines the power supplied to the heater 30 by the effective AC current supplied to the induction coil 50.

[0047] Or in some other modified embodiments, the circuit 20, the induction coil 50, and the heater 30 together constitute a load of the battery cell 10, and in practice, the losses of the circuit 20 and the induction coil 50 in the load are basically rated or known, and therefore, the power supplied to the heater 30 can be calculated and obtained by further monitoring electrical characteristic parameters such as the voltage and / or current output from the battery cell 10 to the load.

[0048] In some other modified embodiments, the heater 30 used in the aerosol generating device is a resistance heater, and accordingly, in the heating process, the heater 30 generates Joule heat due to the DC current supplied from the battery cell 10 to the heater 30, thereby generating heat. Accordingly, in practice, electrical characteristic parameters such as the power supply voltage U and current I directly output from the battery cell 10 to the heater 30 are monitored, and the power supplied to the heater 30 is calculated by combining them with the resistance value R of the heater 30. For example, the power calculation formula P=U 2 / R, or P=I 2 The power supplied to the heater 30 is determined by R, or P=UI, etc.

[0049] Or in some other embodiments, based on the detected power supplied to the heater 30, a given or pre-set power curve or temperature curve is modified or adjusted, and the power supply to the heater 30 is controlled according to the modified power or temperature curve.

[0050] A further embodiment of the present application provides a method for controlling an aerosol generating device, the steps of which can be seen in FIG. 5 and include the following steps: In S10, power is output to the heater 30 so that the actual temperature of the heater 30 meets the preset temperature. In S20, real-time values ​​of the electrical characteristic parameters of the heater 30 are obtained. At S30, an event of removal of the aerosol-generating product from the aerosol-generating device is determined based on the real-time value of the electrical characteristic parameter. S40, in response to the removal event, power output to the heater 30 is stopped.

[0051] In some further embodiments, the electrical characteristic parameter comprises an output voltage or an output power, and determining an event of removal of the aerosol-generating product from the aerosol-generating device based on a real-time value of the electrical characteristic parameter comprises: or determining, based on the real-time value of the output voltage and the predetermined voltage curve, that the real-time value of the output voltage within the predetermined period has decreased relative to a corresponding value in the predetermined voltage curve, thereby determining an event of removal of the aerosol-generating product from the aerosol-generating device; or The method includes a step of determining, based on the real-time value of the output power and the preset power curve, that the real-time value of the output power within a preset period has decreased relative to the corresponding value in the preset power curve, and determining an event of removal of the aerosol-generating product from the aerosol-generating device.

[0052] For example, in implementation, the electrical characteristic parameter may be, for example, the effective voltage or power in Figure 4 described above. Also, the effective voltage curve or power curve for heating when the aerosol-generating product A in Figure 4 is not removed is set to a preset voltage curve or preset power curve, etc. Furthermore, in implementation, the actual voltage or actual power of the actual heating monitored in real time is compared with the corresponding value in the preset voltage curve or preset power curve, and if there is a drop similar to that in Figure 4 compared with the corresponding value, a removal event is determined.

[0053] In some further embodiments, the electrical characteristic parameter comprises an output voltage or an output power, and determining an event of removal of the aerosol-generating product from the aerosol-generating device based on a real-time value of the electrical characteristic parameter comprises: or determining, based on the real-time value of the output voltage and the predetermined voltage curve, that the real-time value of the output voltage within the predetermined period has decreased relative to the corresponding value in the predetermined voltage curve, and if the decrease width meets the predetermined width value, determining an event of removing the aerosol-generating product from the aerosol-generating device; The method includes a step of determining, based on the real-time value of the output power and the preset power curve, that the real-time value of the output power within a preset period has decreased relative to the corresponding value in the preset power curve, and if the decrease width meets the preset width value, determining an event of removing the aerosol-generating product from the aerosol-generating device.

[0054] Similarly, in this embodiment, the effective voltage curve or power curve for heating when the aerosol-generating product A in Figure 4 is not removed is set to a preset voltage curve or preset power curve, etc. Furthermore, in implementation, the actual voltage or actual power of the actual heating monitored in real time is compared with the corresponding value on the preset voltage curve or preset power curve, and similarly to above, if the preset decrease in power or voltage described above is exceeded, a removal event is determined.

[0055] In some further embodiments, the electrical characteristic parameter comprises an output voltage or an output power, and determining an event of removal of the aerosol-generating product from the aerosol-generating device based on a real-time value of the electrical characteristic parameter comprises: determining, based on the real-time value of the output voltage and the predetermined voltage threshold, that the real-time value of the output voltage within the predetermined period is lower than the predetermined voltage threshold, determining an event of removal of the aerosol-generating product from the aerosol-generating device; or The method includes a step of determining, based on the real-time value of the output power and a preset power threshold, that an event of removing the aerosol-generating product from the aerosol-generating device has occurred if it is determined that the real-time value of the output power within a preset period is lower than the preset power threshold.

[0056] Similarly, in practice, the effective voltage curve or power curve for heating when the aerosol-generating product A in Figure 4 is not removed is set to a preset voltage curve or preset power curve, etc. Furthermore, a preset period, for example, from time t10 to time t12 in Figure 4, is selected, and the real-time value of the voltage or power output from the battery cell 10 within this period is monitored and compared with the corresponding value of the preset voltage curve or the preset power curve. If the real-time value of the output voltage or power within the preset period is lower than the corresponding value of the preset voltage curve or the preset power curve, a removal event is determined.

[0057] In some other embodiments, the predetermined period is longer than the duration of the cooling phase of the aerosol generating device.

[0058] In some other embodiments, the electrical characteristic parameter comprises an output voltage or an output power, and the method further comprises: The method further includes step S50 of adjusting the preset power curve or the preset voltage curve provided to the heater 30 based on the acquired real-time value of the output voltage or the real-time value of the output power. In implementation, by modifying or adjusting the given or preset power curve or temperature curve and controlling the power supply to the heater 30 according to the modified power or temperature curve, the curve can be made to more closely match the actual heating situation of the device, and can be used to more accurately determine whether dry-boil has occurred and prevent dry-boil.

[0059] It should be noted that although the specification and drawings of this application show preferred embodiments of this application, this application is not limited to the embodiments described in this specification, and further, a person skilled in the art may make improvements and modifications based on the above description, and all such improvements and modifications shall fall within the scope of protection of the appended claims of this application.

Claims

1. 1. An aerosol generating device for receiving and heating an aerosol-generating product to generate a smoking aerosol, comprising: a heater configured to heat the aerosol-generating product; a battery cell for supplying power; a controller configured to control the power supplied from the battery cell to the heater so that an actual temperature of the heater satisfies a preset temperature when the aerosol generating device is in operation; The controller is further configured to acquire a change in at least one parameter among the power, voltage, and current supplied from the battery cell to the heater, determine an event of removal of the aerosol-generating product from the aerosol-generating device based on a change in the parameter that is a decrease, and control the battery cell to stop supplying power to the heater based on the removal event.

2. 2. The aerosol generating device of claim 1, wherein the controller is configured to determine an event of removal of the aerosol-generating product from the aerosol generating device based on at least one parameter of power, voltage, and current supplied from the battery cell to the heater dropping below a predetermined threshold.

3. The aerosol generating device of claim 1, wherein the controller is configured to determine an event of removal of the aerosol-generating product from the aerosol generating device based on a difference between at least one parameter of the power, voltage, and current supplied from the battery cell to the heater and a preset threshold value.

4. The aerosol generating device of claim 1, wherein the controller is configured to determine an event of removal of the aerosol generating product from the aerosol generating device based on the amount or rate of change within a predetermined time period of at least one parameter of the power, voltage, and current supplied from the battery cell to the heater.

5. further comprising an induction coil, the controller being configured to direct an alternating current through the induction coil to generate a varying magnetic field in the induction coil; 5. The aerosol generating device according to claim 1, wherein the heater is an electromagnetic induction heater that generates heat when penetrated by a changing magnetic field.

6. The aerosol generating device of claim 5, wherein the controller is configured to obtain at least one parameter of power, voltage, and current supplied to the heater from the battery cell based on eddy current losses generated by the heater in a changing magnetic field.

7. The aerosol generating device of claim 5, wherein the controller is configured to obtain at least one parameter of the power, voltage, and current supplied from the battery cell to the heater based on the effective voltage value of the alternating current flowing through the induction coil.

8. 1. A method of controlling an aerosol generating device for receiving and heating an aerosol-generating product to generate a smoking aerosol, the aerosol generating device including a heater configured to heat the aerosol-generating product and a battery cell for providing power, the method comprising: outputting power to the heater so that the actual temperature of the heater meets a preset temperature; acquiring a value of an electrical characteristic parameter including at least one of a power, a voltage, and a current supplied from the battery cell to the heater; determining a removal event of the aerosol-generating product from the aerosol-generating device based on a decrease in the value of the electrical characteristic parameter; and ceasing power output to the heater in response to the removal event.

9. The electrical characteristic parameter includes an output voltage or an output power, and determining an event of removing the aerosol-generating product from the aerosol-generating device based on a value of the electrical characteristic parameter includes: Based on the value of the output voltage and a predetermined voltage curve, determining that the value of the output voltage within a predetermined period of time has decreased relative to a corresponding value on the predetermined voltage curve, thereby determining an event of removal of the aerosol-generating product from the aerosol-generating device; or 9. The method for controlling an aerosol generating device according to claim 8, further comprising determining, based on the value of the output power and a predetermined power curve, that the value of the output power within a predetermined period of time has decreased relative to a corresponding value on the predetermined power curve, thereby determining an event of removing the aerosol generating product from the aerosol generating device.

10. The electrical characteristic parameter includes an output voltage or an output power, and determining an event of removing the aerosol-generating product from the aerosol-generating device based on a value of the electrical characteristic parameter includes: Based on the value of the output voltage and a predetermined voltage curve, determine that the value of the output voltage within a predetermined period of time decreases relative to the corresponding value on the predetermined voltage curve, and the decrease amount meets a predetermined amount, thereby determining an event of removing the aerosol-generating product from the aerosol-generating device; or 9. The method for controlling an aerosol generating device according to claim 8, further comprising determining, based on the output power value and a predetermined power curve, that the output power value within a predetermined period of time decreases relative to the corresponding value on the predetermined power curve and that the decrease width satisfies a predetermined width value, thereby determining an event of removing the aerosol generating product from the aerosol generating device.

11. The electrical characteristic parameter includes an output voltage or an output power, and determining an event of removing the aerosol-generating product from the aerosol-generating device based on a value of the electrical characteristic parameter includes: determining, based on the value of the output voltage and a predetermined voltage threshold, that the value of the output voltage within a predetermined period of time is lower than the predetermined voltage threshold, a removal event of the aerosol-generating product from the aerosol-generating device; or The method for controlling an aerosol generating device described in claim 8, further comprising determining, based on the value of the output power and a predetermined power threshold, if it is determined that the value of the output power within a predetermined period is lower than the predetermined power threshold, an event of removing the aerosol generating product from the aerosol generating device.

12. 12. The method for controlling an aerosol generating device according to claim 9, wherein the predetermined period is longer than the duration of a temperature decreasing stage of the aerosol generating device.

13. The electrical characteristic parameter comprises an output voltage or an output power, and the method further comprises:

10. The method for controlling an aerosol generating device according to claim 9, further comprising adjusting the preset power curve or the preset voltage curve supplied to the heater based on the acquired value of output voltage or output power.

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