Aerosol generating device and control method therefor

Abstract

An aerosol generating device and a control method therefor. The aerosol generating device comprises: a heater (10) used for heating an aerosol-forming substrate to generate an aerosol; a battery cell (20); and a switch circuit (30) electrically connected between the battery cell (20) and the heater (10), the switch circuit (30) comprising at least one switching transistor. The control method comprises: during one or multiple heating cycles, controlling the on-off of the switching transistor, so as to regulate the power provided by the battery cell (20) to the heater (10), so that the temperature of the heater (10) remains at a predetermined target temperature; and, during the heating cycle, step-wise adjusting the duty cycle of a pulse width modulation signal that is output to the switching transistor, so that a heating temperature gradually approaches the target temperature. The aerosol generating device and the control method enable duty cycles of pulse width modulation signals that are output to switching transistors to smoothly change, and reduce current variations and mechanical vibration amplitudes, so as to control the decibel value of noise generated by the aerosol generating device, thus improving user experience.

Description

Aerosol generating device and its control method

[0001] Cross-reference of related applications

[0002] This application claims priority to Chinese Patent Application No. 202410548310.0, filed on May 6, 2024, entitled "Aerosol Generating Device and Control Method Thereof", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of aerosol generation technology, and in particular to an aerosol generation device and its control method. Background Technology

[0004] Articles such as cigarettes and cigars produce tobacco smoke by burning tobacco during use. Efforts have been made to provide alternatives to these tobacco-burning articles by releasing compounds without combustion. Examples of such products are so-called heated non-combustible products, also known as tobacco heating products, tobacco heating devices, or aerosol generating devices, which release compounds by heating a material without burning it. The material may be, for example, tobacco or other non-tobacco products or combinations thereof, such as blends that may or may not contain nicotine.

[0005] Existing aerosol generating devices are prone to mechanical vibration during heating, which in turn generates noise and results in a poor user experience. For example, when the current flowing through a conductor (or other conductive body) changes, the magnetic field also changes accordingly. Generally, the magnitude of the magnetic force is proportional to the current. Since the conductor experiences displacement due to the force in the magnetic field, it causes mechanical vibration and generates noise.

[0006] Application content

[0007] This application provides an aerosol generating device and its control method, aiming to solve the noise problem of existing aerosol generating devices.

[0008] This application provides a control method for an aerosol generating device, the aerosol generating device comprising:

[0009] A heater used to heat an aerosol-forming matrix to generate aerosols;

[0010] Battery cells, used to provide power to the heater;

[0011] A switching circuit is electrically connected between the battery cell and the heater, and the switching circuit includes at least one switching transistor.

[0012] The control method includes:

[0013] In one or more heating cycles, the switching on and off of the switching transistor is controlled to adjust the power supplied by the battery cell to the heater, so that the temperature of the heater is maintained at a preset target temperature;

[0014] In the heating cycle, the duty cycle of the pulse width modulation signal output to the switching transistor is adjusted stepwise so that the heating temperature gradually approaches the target temperature.

[0015] Another aspect of this application provides an aerosol generating apparatus, comprising:

[0016] A heater used to heat an aerosol-forming matrix to generate aerosols;

[0017] Battery cells, used to provide power to the heater;

[0018] A switching circuit is electrically connected between the battery cell and the heater, and the switching circuit includes at least one switching transistor.

[0019] The control unit is configured to control the switching on and off of the switching transistor in one or more heating cycles to adjust the power supplied by the battery cell to the heater so that the temperature of the heater is maintained at a preset target temperature; and to adjust the duty cycle of the pulse width modulation signal output to the switching transistor in a stepwise manner in the heating cycle so that the heating temperature gradually approaches the target temperature.

[0020] The aerosol generating device and its control method provided in this application adjust the duty cycle of the pulse width modulation signal output to the switching transistor in a stepwise manner while the heater temperature is maintained at the target temperature. This makes the duty cycle of the pulse width modulation signal output to the switching transistor change smoothly, reduces the amount of current change, and reduces the amplitude of mechanical vibration, thereby controlling the noise level generated by the aerosol generating device and improving the user experience. Attached Figure Description

[0021] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0022] Figure 1 is a schematic diagram of the aerosol generating apparatus provided in the embodiments of this application;

[0023] Figure 2 is a specific circuit diagram provided in an embodiment of this application;

[0024] Figure 3 is a schematic diagram of the temperature curve of the heater provided in the embodiment of this application;

[0025] Figure 4 is a schematic diagram of the stepped adjustment of duty cycle provided in the embodiments of this application;

[0026] Figure 5 is a schematic diagram of the control method of the aerosol generating device provided in the embodiments of this application;

[0027] Figure 6 is a schematic diagram of measured data of the aerosol generating device provided in the embodiments of this application. Detailed Implementation

[0028] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. 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 between them. 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 between them. The terms "upper," "lower," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0030] Figure 1 is a schematic diagram of an aerosol generating device provided in an embodiment of this application.

[0031] As shown in Figure 1, the aerosol generating device includes:

[0032] Chamber A contains a removable aerosol-generated article B.

[0033] Heater 10: When the aerosol generating article B is received in the chamber A, heater 10 can be inserted into the aerosol generating article B for heating to generate aerosol;

[0034] Cell 20 is used for power supply;

[0035] Circuit 30 is disposed between battery cell 20 and heater 10. Circuit 30 is used to control the aerosol generating device; for example, to control the battery cell 20 to supply power to heater 10.

[0036] The aerosol-generating article B preferably uses a tobacco-containing material that releases volatile compounds from the matrix upon heating; or it may be a non-tobacco material suitable for electric heating and smoke generation after heating. The aerosol-generating article B preferably uses a solid matrix, which may include one or more of the following: vanilla leaves, tobacco leaves, homogenized tobacco, expanded tobacco, powder, granules, fragments, strips, or sheets; or the solid matrix may contain additional tobacco or non-tobacco volatile flavor compounds to be released when the matrix is ​​heated.

[0037] It should be noted that the heating method of heater 10 includes, but is not limited to, resistance heating, electromagnetic heating, and infrared heating. The shape of heater 10 includes, but is not limited to, needle-shaped, pin-shaped, or sheet-shaped.

[0038] It should also be noted that, unlike the example in Figure 1, in other examples, it is also possible for the heater 10 to be configured to heat at least part of the aerosol-generating article B, i.e., circumferential heating or peripheral heating, etc.

[0039] Figure 2 shows a schematic diagram of the basic components of one embodiment of circuit 30.

[0040] As shown in Figure 2, circuit 30 includes:

[0041] The first switch Q1 is positioned between the battery cell 20 (shown as Vbat in the figure) and the heater 10 (shown as R1 in Figure 2); when the first switch Q1 is turned on, the battery cell 20 provides power to the heater 10.

[0042] The sampling resistor R2 is positioned between the second switch Q2 and the heater 10. Specifically, the first terminal of the sampling resistor R2 (shown as a1 in the figure) is connected to the second switch Q2, and the second terminal (shown as b1 in the figure) is connected to the heater 10. This sampling resistor R2 is a standard resistor with a basically constant resistance value, ranging from 0.1mΩ to 1000KΩ. It is used to form a series connection with the heater 10 when the second switch Q2 is turned on, thereby forming a detection circuit that can detect the voltage between the sampling resistor R2 and the heater 10 through voltage division. Of course, when detection is not required, the second switch Q2 is turned off to disconnect the detection circuit.

[0043] In the specific implementation shown in Figure 2, the first terminal of the heater 10 includes two paths; the first path is connected to the first switching transistor Q1, and the second path is used to form a series connection with the sampling resistor R2. The second terminal of the heater 10 is grounded, that is, the potential of the second terminal of the heater 10 is 0.

[0044] Further, in the specific implementation shown in Figure 2, the first switch Q1 and the second switch Q2 are controlled by the control unit to turn on and off, and the first switch Q1 and the second switch Q2 are not turned on simultaneously. The control unit includes, but is not limited to, a microcontroller (MCU). When power is needed to supply power to the heater 10, the control unit controls the first switch Q1 to turn on and the second switch Q2 to turn off, so that the battery cell 20 supplies power to the heater 10. When it is necessary to detect the heating temperature of the heater 10, the control unit controls the first switch Q1 to turn off and the second switch Q2 to turn on. The heating temperature can be determined by the detection circuit, the sampling resistor R2, and the relevant electrical characteristics of the heater 10, such as voltage.

[0045] Let V1 be the voltage across the sampling resistor R2 and V2 be the voltage across the heater 10. During the detection process, the control unit can sample the voltage at the first end of the sampling resistor R2, i.e., sampling point a1 in Figure 2, and record it as Va1. This voltage is the voltage across the detection circuit. The voltage at the first end of the heater 10, i.e., sampling point b1 in Figure 3, is also sampled as Vb1. Since the second end of the heater 10 is grounded in Figure 3, the voltage at sampling point b1 is Vb1 = V2, and the voltage across the sampling resistor R2 is V1 = Va1 - Vb1. Thus, the current resistance of the heater 10 can be determined as follows:

[0046] The current temperature of heater 10 can then be determined based on the TCR calculation formula.

[0047] Understandably, in other examples, the real-time temperature of heater 10 can be detected by a temperature sensor, such as a thermocouple.

[0048] Figure 3 is a schematic diagram of the temperature curve of the heater provided in the embodiment of this application.

[0049] As shown in Figure 3, the horizontal axis t of the temperature curve represents time, and the vertical axis T represents temperature.

[0050] At time t0, the initial temperature of heater 10 is T0.

[0051] In the example in Figure 3, the initial temperature is higher than the ambient temperature; in other examples, the initial temperature can be the ambient temperature.

[0052] During the time period t0 to t1, the control unit controls the power of the heater 10 to heat at a preset power, for example, a maximum power of 36W; at time t1, the heater 10 heats up to the preset temperature T1. The time period t0 to t1 is the heating phase of the heater.

[0053] The preset temperature can be the optimal temperature at which the aerosol-forming matrix in aerosol-generating article B produces aerosols. That is, at this temperature, the aerosol-forming matrix can provide the most suitable vapor volume and temperature for the user's inhalation, resulting in a better taste. The preset temperatures used in the embodiments of this application are between 150℃ and 350℃; or between 180℃ and 350℃; or between 220℃ and 350℃; or between 220℃ and 300℃; or between 220℃ and 280℃; or between 220℃ and 260℃.

[0054] During the time period t1 to t2, the control unit controls the power supplied by the battery cell 20 to the heater 10 and controls the heater 10 to maintain at a preset temperature T1 (220℃) for a period of time (i.e., the time period t1 to t2). It should be noted that in other examples, it is also feasible not to set the time period t1 to t2. The time period t1 to t2 is the heat preservation stage in the heating phase of the heater.

[0055] At time t2, the control unit can output a prompt signal indicating that aerosol can be aspirated, prompting the user to aspirate. Specifically, a prompting device connected to the control unit can perform the prompting operation based on the prompt signal indicating that aerosol can be aspirated. For example, the prompting device is a vibration motor, which vibrates to prompt the user that aerosol can be aspirated based on the prompt signal (including a start signal for controlling the vibration motor's operation) output by the control unit. Another example is an LED light, which stays on or flashes to prompt the user to aspirate aerosol based on the prompt signal output by the control unit.

[0056] During the time period t2 to t3, after outputting the prompt signal indicating that aerosols can be aspirated, the control unit controls the power supplied by the battery cell 20 to the heater 10 and controls the temperature of the heater 10 to drop from T1 to the target temperature T2. Subsequently, the control unit controls the power supplied by the battery cell 20 to the heater 10 to maintain the heater 10 at the target temperature T2.

[0057] The time period t2 to t3 can be 120 to 360 seconds or the duration of 6 to 20 suction draws. The time period t2 to t3 represents the suction phase within the heating phase of the heater.

[0058] Based on the above aerosol generating device, in one example, the control unit is configured to control the on / off state of the switching transistor in one or more heating cycles to adjust the power supplied by the battery cell to the heater so that the temperature of the heater is maintained at a preset target temperature; and to adjust the duty cycle of the pulse width modulation signal output to the switching transistor in a stepwise manner in the heating cycle so that the heating temperature gradually approaches the target temperature.

[0059] For example, during the heat preservation stage, the power supplied by the battery cell to the heater is controlled to maintain the heater temperature at a preset target temperature T1. During the suction stage, the power supplied by the battery cell to the heater is controlled to maintain the heater temperature at a preset target temperature T2. The power supplied by the battery cell to the heater during the heat preservation stage and the power supplied by the battery cell to the heater during the suction stage can be the same or different. In a preferred embodiment, the power supplied by the battery cell to the heater during the heat preservation stage is greater than the power supplied by the battery cell to the heater during the suction stage.

[0060] In the aforementioned heating cycle, the switching on and off of the switching transistor is controlled based on the temperature difference of the heater, thereby adjusting the power supplied by the battery cell to the heater so that the temperature of the heater is maintained at a preset target temperature. It can be understood that the heating cycle refers to one period of power adjustment based on the temperature difference.

[0061] By adjusting the duty cycle of the pulse width modulation signal output to the switching transistor in a stepwise manner during the heating cycle, the heating temperature can gradually approach the target temperature. This also allows for smoother changes in the duty cycle of the pulse width modulation signal, reducing current fluctuations and mechanical vibration amplitude, thereby controlling the noise level of the aerosol generator and improving the user experience. For example, each adjustment of the duty cycle of the pulse width modulation signal output to the switching transistor results in a current change between 0 and 1A, or between 0 and 0.8A, or between 0 and 0.6A, or between 0 and 0.4A, or between 0 and 0.2A, or between 0 and 0.1A, or between 0 and 0.05A. Throughout the entire adjustment period, the current change can be between 0 and 5A, or between 0 and 4A, or between 0 and 3A, or between 0 and 2A. This reduces the amplitude of mechanical vibration and controls the noise level of the aerosol generator within a user-acceptable range, for example, limiting it to below a reference decibel value of 45 dB. As a preferred embodiment, the noise level of the aerosol generator is further limited to user-acceptable ranges such as 0 dB-32 dB, 0 dB-30 dB, 0 dB-26 dB, 0 dB-20 dB, or 5 dB-20 dB, etc.

[0062] In one example, the duty cycle of the pulse width modulation signal output to the switching transistor is adjusted in a stepwise manner. The adjustment range of the duty cycle for each step can be fixed or variable. The adjustment range of the duty cycle for each step is between 1% and 30%, or between 1% and 25%, or between 5% and 25%, or between 10% and 25%, or between 15% and 25%.

[0063] Taking Figure 4 as an example, Figure 4 is a schematic diagram of gradually increasing the duty cycle of the pulse width modulation signal output to the switching transistor. The horizontal axis in the figure represents time, and the vertical axis represents the duty cycle. During the entire adjustment process, the duty cycle of the pulse width modulation signal is adjusted eight times, as shown by t21 to t28 in the figure, with D1 to D8 representing the corresponding duty cycles. ΔD in the figure represents the adjustment range between the first and second adjustments; ΔD can be fixed or variable. In a preferred embodiment, ΔD is between 1% and 30%.

[0064] In one example, the control unit is configured to determine the real-time temperature of the heater and adjust the duty cycle in a stepwise manner based on a comparison between the real-time temperature of the heater and the target temperature.

[0065] Specifically, if the real-time temperature of the heater is lower than the target temperature, the duty cycle is increased in a stepwise manner; if the real-time temperature of the heater is higher than the target temperature, the duty cycle is decreased in a stepwise manner.

[0066] In one example, the control unit is configured to determine the current duty cycle of the pulse width modulation signal; and to calculate the adjusted duty cycle of the pulse width modulation signal based on the current duty cycle of the pulse width modulation signal and a preset adjustment function.

[0067] The preset adjustment function includes at least one of linear functions, convex functions, and concave functions.

[0068] Taking the example where the real-time temperature of the heater is lower than the target temperature, the duty cycle needs to be increased in a stepwise manner because the real-time temperature of the heater is lower than the target temperature. Assume the current duty cycle is D. cur U p (N) is the preset adjustment function, and the adjusted duty cycle is D. set Then D set =D cur +U p (N), where (N is the number of adjustments, N = 0, 1, 2, 3...).

[0069] In further implementation, adjustments can be made based on the adjustment coefficient D. step The adjusted duty cycle is determined to be D. set Adjustment factor D step The adjustment coefficient D is determined by the aerosol generating device itself; different aerosol generating devices have different adjustment coefficients. step This coefficient can be obtained experimentally. The adjusted duty cycle is D. set =D cur +U p (N)*D step .

[0070] Similarly, when the real-time temperature of the heater is greater than the target temperature, the adjusted duty cycle can be calculated using the following formula, D. set =D cur +Fall(N) or D set =D cur +Fall(N)*D step Where Fall(N) is a preset adjustment function. It can be understood that when Fall(N) is a linear function, the duty cycle of the pulse width modulation signal output to the switching transistor is adjusted in a stepwise manner, with a fixed adjustment range for each step. When Fall(N) is a convex or concave function, for example, Fall(N) = sin(N*π / 6), the duty cycle of the pulse width modulation signal output to the switching transistor is adjusted in a stepwise manner, with a varying adjustment range for each step. Preset adjustment function U p (N) is similar.

[0071] In one example, the control unit is configured to, during the step-wise adjustment of the duty cycle, if the adjusted duty cycle is greater than or equal to a preset maximum duty cycle, then the duty cycle of the pulse width modulation signal output to the switching transistor is the maximum duty cycle; if the adjusted duty cycle is less than or equal to a preset minimum duty cycle, then the duty cycle of the pulse width modulation signal output to the switching transistor is the minimum duty cycle.

[0072] Assume the maximum duty cycle is 100% and the minimum duty cycle is 0. If the adjusted duty cycle is D... set If the duty cycle is greater than or equal to 100%, then the duty cycle of the pulse width modulation signal output to the switching transistor is 100%. If the adjusted duty cycle is D... set If the duty cycle is less than or equal to 0, the duty cycle of the pulse width modulation signal output to the switching transistor is 0. It is understood that the maximum or minimum duty cycle value is not limited to the above conditions.

[0073] Figure 5 is a schematic diagram of the control method of the aerosol generating device provided in the embodiments of this application.

[0074] The aerosol generating device can be referred to the foregoing section, and the control method includes:

[0075] Step S11: In one or more heating cycles, control the switching on and off of the switching tube to adjust the power supplied by the battery cell to the heater so that the temperature of the heater is maintained at a preset target temperature;

[0076] Step S12: In the heating cycle, the duty cycle of the pulse width modulation signal output to the switching transistor is adjusted stepwise so that the heating temperature gradually approaches the target temperature.

[0077] In one example, the duty cycle is adjusted between 1% and 30%.

[0078] In one example, the adjustment range of the duty cycle is either fixed or variable.

[0079] In one example, the control method includes:

[0080] Determine the real-time temperature of the heater;

[0081] The duty cycle is adjusted in a stepwise manner based on the comparison between the real-time temperature of the heater and the target temperature.

[0082] In one example, the control method includes:

[0083] If the real-time temperature of the heater is lower than the target temperature, the duty cycle is increased stepwise; if the real-time temperature of the heater is higher than the target temperature, the duty cycle is decreased stepwise.

[0084] In one example, the control method includes:

[0085] Determine the current duty cycle of the pulse width modulation signal;

[0086] The adjusted duty cycle of the pulse width modulation signal is calculated based on the current duty cycle of the pulse width modulation signal and the preset adjustment function.

[0087] In one example, the preset adjustment function includes at least one of a linear function, a convex function, and a concave function.

[0088] In one example, the control method includes:

[0089] During the stepwise adjustment of the duty cycle, if the adjusted duty cycle is greater than or equal to the preset maximum duty cycle, the duty cycle of the pulse width modulation signal output to the switching transistor is the maximum duty cycle; if the adjusted duty cycle is less than or equal to the preset minimum duty cycle, the duty cycle of the pulse width modulation signal output to the switching transistor is the minimum duty cycle.

[0090] In one example, the heating process of the heater includes a heat preservation stage and a suction stage;

[0091] The control method includes:

[0092] During the heat preservation phase and the suction phase, the power supplied to the heater by the battery cell is controlled to be different, so that the temperature of the heater is maintained at different target temperatures.

[0093] [Corrected according to Rule 91, May 29, 2025] Figure 6 is a schematic diagram of measured data of the aerosol generating device provided in the embodiments of this application. Line 1 represents the duty cycle of the pulse width modulation signal (horizontal axis: time, vertical axis: percentage), line 2 represents the target temperature (horizontal axis: time, vertical axis: temperature), and line 3 represents the real-time temperature of the heater (horizontal axis: time, vertical axis: temperature). Lines 1 and 3 are curves, while line 2 is a straight line. As can be seen from the figure, the duty cycle of the pulse width modulation signal changes in a stepwise manner, and the real-time temperature of the heater fluctuates around the target temperature, with a fluctuation range of approximately 2°C to 10°C.

[0094] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this application's specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A control method for an aerosol generating device, characterized in that, The aerosol generating device includes: A heater used to heat an aerosol-forming matrix to generate aerosols; Battery cells, used to provide power to the heater; A switching circuit is electrically connected between the battery cell and the heater, and the switching circuit includes at least one switching transistor. The control method includes: In one or more heating cycles, the switching on and off of the switching transistor is controlled to adjust the power supplied by the battery cell to the heater, so that the temperature of the heater is maintained at a preset target temperature; In the heating cycle, the duty cycle of the pulse width modulation signal output to the switching transistor is adjusted stepwise so that the heating temperature gradually approaches the target temperature.

2. The control method according to claim 1, characterized in that, The duty cycle adjustment range is between 1% and 30%.

3. The control method according to claim 1 or 2, characterized in that, The adjustment range of the duty cycle is either fixed or variable.

4. The control method according to claim 1, characterized in that, The control method includes: Determine the real-time temperature of the heater; The duty cycle is adjusted in a stepwise manner based on the comparison between the real-time temperature of the heater and the target temperature.

5. The control method according to claim 4, characterized in that, The control method includes: If the real-time temperature of the heater is lower than the target temperature, the duty cycle is increased stepwise; if the real-time temperature of the heater is higher than the target temperature, the duty cycle is decreased stepwise.

6. The control method according to claim 1, characterized in that, The control method includes: Determine the current duty cycle of the pulse width modulation signal; The adjusted duty cycle of the pulse width modulation signal is calculated based on the current duty cycle of the pulse width modulation signal and the preset adjustment function.

7. The control method according to claim 6, characterized in that, The preset adjustment function includes at least one of linear functions, convex functions, and concave functions.

8. The control method according to claim 1, characterized in that, The control method includes: During the stepwise adjustment of the duty cycle, if the adjusted duty cycle is greater than or equal to the preset maximum duty cycle, the duty cycle of the pulse width modulation signal output to the switching transistor is the maximum duty cycle; if the adjusted duty cycle is less than or equal to the preset minimum duty cycle, the duty cycle of the pulse width modulation signal output to the switching transistor is the minimum duty cycle.

9. The control method according to claim 1, characterized in that, The heating process of the heater includes a heat preservation stage and a suction stage; The control method includes: During the heat preservation phase and the suction phase, the power supplied to the heater by the battery cell is controlled to be different, so that the temperature of the heater is maintained at different target temperatures.

10. An aerosol generating device, characterized in that, include: A heater used to heat an aerosol-forming matrix to generate aerosols; Battery cells, used to provide power to the heater; A switching circuit is electrically connected between the battery cell and the heater, and the switching circuit includes at least one switching transistor. The control unit is configured to control the switching on and off of the switching transistor in one or more heating cycles to adjust the power supplied by the battery cell to the heater so that the temperature of the heater is maintained at a preset target temperature. In the heating cycle, the duty cycle of the pulse width modulation signal output to the switching transistor is adjusted stepwise so that the heating temperature gradually approaches the target temperature.

11. The aerosol generating apparatus according to claim 10, characterized in that, It also includes a temperature sensor for detecting the real-time temperature of the heater.

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