Aerosol-generating device and control method thereof
By controlling the aerosol generation device and control method that regulates the fluctuation of the heating element within a preset temperature range, the problems of high energy consumption and electromagnetic noise in existing heating non-combustion devices are solved, thereby improving user experience and heat transfer efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN FIRST UNION TECH CO LTD
- Filing Date
- 2024-12-04
- Publication Date
- 2026-06-05
AI Technical Summary
Existing heated non-combustible devices use a single temperature threshold to control the temperature of the heating element, resulting in a high frequency of heating power adjustment, high overall energy consumption, and electromagnetic noise, which reduces the user experience.
By employing an aerosol generation device control method, the heating element is controlled to fluctuate between a first preset temperature threshold and a second preset temperature threshold, thereby reducing the frequency of heating power adjustment during preheating and suction, reducing overall energy consumption, and avoiding electromagnetic noise.
The frequency of heating power adjustment during preheating and suction is reduced, thus reducing overall energy consumption, improving user experience, and enhancing heat transfer efficiency and baking effect between heating elements and aerosol forming matrix.
Smart Images
Figure CN122140034A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of aerosol generation technology, and in particular to an aerosol generation device and its control method. Background Technology
[0002] Tobacco products (e.g., cigarettes, cigars, etc.) produce tobacco smoke by burning tobacco during use. Efforts are being made to replace these tobacco-burning products by creating products that release compounds without combustion. Examples of such products are heated non-combustible devices that release compounds by heating rather than burning a material; for example, the material may be tobacco or other non-tobacco products, which may or may not contain nicotine.
[0003] Most existing heated non-combustible devices use a single temperature threshold to control the temperature of the heating element. This means that when the real-time temperature of the heating element is higher than the preset threshold, the heating power is reduced; conversely, when the real-time temperature is lower than the preset threshold, the heating power is increased. The problems with this method are that the heating power is adjusted frequently, resulting in high overall energy consumption, poor battery life, and electromagnetic noise, which degrades the user experience. Summary of the Invention
[0004] This application provides an aerosol generating device and its control method to solve the problems existing in controlling the temperature of heating elements using a single temperature threshold.
[0005] This application provides an aerosol generating apparatus, comprising:
[0006] A power source is used to provide electricity;
[0007] Heating element for heating the aerosol forming matrix to generate aerosol;
[0008] The control unit is configured to control the heating element to fluctuate between a first preset temperature threshold and a second preset temperature threshold during the preheating period when the heating element rises from an initial temperature to a preset target temperature; wherein the first preset temperature threshold is greater than the second preset temperature threshold.
[0009] Another embodiment of this application provides a control method for an aerosol generating device, the control method comprising:
[0010] During the preheating period when the heating element rises from its initial temperature to a preset target temperature, the heating element is controlled to fluctuate between a first preset temperature threshold and a second preset temperature threshold; wherein the first preset temperature threshold is greater than the second preset temperature threshold.
[0011] The above aerosol generating device and its control method control the heating element to fluctuate between a first preset temperature threshold and a second preset temperature threshold during the preheating period when the heating element rises from the initial temperature to the preset target temperature; this reduces the frequency of adjusting the heating power during the preheating period, reduces the overall energy consumption, avoids electromagnetic noise, and improves the user experience. Attached Figure Description
[0012] 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.
[0013] Figure 1 This is a schematic diagram of the aerosol generating device provided in the embodiments of this application;
[0014] Figure 2 This is a schematic diagram of the heating curve provided in an embodiment of this application;
[0015] Figure 3 This is a circuit diagram provided in an embodiment of this application;
[0016] Figure 4 This is a schematic diagram of the heating curve during the actual working process provided in the embodiments of this application;
[0017] Figure 5 This is a schematic diagram of the control method for the aerosol generation device provided in the embodiments of this application. Detailed Implementation
[0018] To facilitate understanding of this application, a more detailed description of this application will be provided below in conjunction with the accompanying drawings and specific embodiments.
[0019] Figure 1 This is a schematic diagram of the aerosol generating apparatus provided in the embodiments of this application.
[0020] like Figure 1 As shown, the aerosol generating device includes:
[0021] Chamber A contains a removable aerosol-generated article B.
[0022] When the aerosol generating article B is received in the chamber A, the heating element 10 can be inserted into the aerosol generating article B to heat the aerosol forming matrix to generate aerosol.
[0023] Power source 20 is used to provide power; in one example, power source 20 includes a battery cell, which may be a rechargeable battery cell or a disposable battery cell, such as a lithium iron phosphate (LiFePO4) battery cell, a lithium cobalt oxide (LiCoO2) battery cell, a lithium titanate battery cell, etc.
[0024] Circuit 30 is disposed between power supply 20 and heating element 10. Circuit 30 includes a control unit. The control unit is configured as a hardware component to control the overall operation of the aerosol generating apparatus, for example, controlling the power supply 20 to provide power to heating element 10. The control unit may be implemented as an array of logic gates, or it may be implemented as a combination of a microcontroller and a memory storing a program executable in the microcontroller. Those skilled in the art will understand that it may be implemented in other forms of hardware.
[0025] 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.
[0026] It should be noted that the heating method of the heating element 10 includes, but is not limited to, resistance heating, electromagnetic heating, and infrared heating. The shape of the heating element 10 includes, but is not limited to, needle-shaped, pin-shaped, or sheet-shaped.
[0027] It should also be noted that, with Figure 1 Unlike the example, in other examples, it is also possible for the heating element 10 to be configured to heat at least a portion of the aerosol-generating article B, i.e., circumferential heating or peripheral heating, etc.
[0028] based on Figure 1 The aerosol generating device shown needs to monitor the temperature of the heating element 10 heating the aerosol forming matrix in order to control the power supply 20 to provide power to the heating element 10, thereby providing a better user experience.
[0029] In an optional implementation, the real-time temperature of the heating element 10 is sensed by a temperature sensor, such as a thermistor, positioned close to the heating element 10. The resistance value of the thermistor changes with the heating temperature; generally, they are classified into positive temperature coefficient thermistors and negative temperature coefficient thermistors according to their temperature coefficients.
[0030] In another alternative implementation, the heating element 10 can be used both to heat the aerosol forming matrix and as a thermistor for sensing real-time temperature. For example, the resistive material of the heating element 10 can be selected from metals or alloys with a suitable temperature coefficient of resistance, such as a positive or negative temperature coefficient, so that the heating element 10 can be used both to generate heat and as a temperature sensor for sensing the real-time temperature of the heating element 10.
[0031] It is understandable that temperature sensors are not limited to the above-mentioned thermistor elements; for example, thermocouples can also be used.
[0032] Figure 2 This is a schematic diagram of the heating curve provided in the embodiments of this application.
[0033] like Figure 2 As shown, the entire heating period of the heating element 10 includes the preheating period t0~t1, the heat preservation period t1~t2, and the suction period t2~t3. The horizontal axis in the figure represents time, and the vertical axis represents temperature.
[0034] During the preheating period t0 to t1, the temperature of the heating element 10 rises from the initial temperature T0 (or ambient temperature) to the preset target temperature T1. Generally, the preset target temperature T1 can be 200℃-400℃.
[0035] During the heat preservation period t1~t2, the temperature of the heating element 10 is maintained at the preset target temperature T1 for a period of time so that the aerosol forming matrix is fully preheated, thereby improving the user's smoking experience.
[0036] The t0 to t2 mentioned above are the preheating times of the heating element 10. Generally, the preheating time of the heating element 10 is between 5 seconds and 30 seconds.
[0037] During the suction period t2 to t3, the temperature of the heating element 10 decreases from the preset target temperature T1 to the preset target temperature T2, where T2 is the optimal temperature for the aerosol-forming matrix to generate aerosols. During this stage, the temperature of the heating element 10 generally fluctuates around the preset target temperature T2, and t2 to t3 represents the duration. It is understood that the preset target temperature T2 can have multiple different values throughout the suction period.
[0038] It should be noted that the heating curve of the heating element 10 is not limited to... Figure 2 In other examples, it is also feasible for the heating element 10 to have a heating curve that only includes the preheating period and the suction period.
[0039] Figure 3 This is a circuit diagram provided in an embodiment of this application.
[0040] like Figure 3As shown, circuit 30 includes:
[0041] The first switching transistor Q1 is positioned between the power supply 20 and the heating element 10. Figure 3 The first switch Q1 is used to supply power to the heating element 10 when the first switch Q1 is turned on; when the first switch Q1 is turned off, it is used to stop the power supply 20 from supplying power to the heating element 10. When the first switch Q1 is turned on and off intermittently with a certain duty cycle, it is used to supply power to the heating element 10 with a preset power or voltage.
[0042] A sampling resistor R1 is positioned between the second switch Q2 and the heating element 10. Specifically, the first end of the sampling resistor R1 is connected to the second switch Q2, and the second end is connected to the heating element 10. This sampling resistor R1 is a standard resistor with a basically constant resistance, ranging from 0.1mΩ to 1000KΩ. It is used to form a series connection with the heating element 10 when the second switch Q2 is turned on, thereby forming a detection circuit that can detect the voltage between the sampling resistor R1 and the heating element 10 through voltage division. Of course, when detection is not required, the second switch Q2 can be turned off, i.e., the detection circuit is disconnected.
[0043] exist Figure 3 In the specific implementation shown, the first terminal of the heating element 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 R1. The second terminal of the heating element 10 is grounded, that is, the potential of the second terminal of the heating element 10 is 0.
[0044] Further in Figure 3 In the specific implementation shown, the first switch Q1 and the second switch Q2 are controlled to be switched on and off by the control unit 301, and the first switch Q1 and the second switch Q2 are not turned on simultaneously. The control unit 301 includes, but is not limited to, a microcontroller (MCU). When power is needed to supply power to the heating element 10, the control unit 301 controls the first switch Q1 to be turned on and the second switch Q2 to be turned off, or controls the first switch Q1 to be turned on and off intermittently with a certain duty cycle, so that the power supply 210 supplies power to the heating element 10. When it is necessary to detect the heating temperature of the heating element 10, the control unit 301 controls the first switch Q1 to be turned off and the second switch Q2 to be turned on. The heating temperature can be determined by the detection circuit, the sampling resistor R1, and the relevant electrical characteristics of the heating element 10, such as voltage.
[0045] Based on the above aerosol generating device, in order to reduce the frequency of adjusting the heating power during preheating, reduce the overall energy consumption, and avoid generating electromagnetic noise.
[0046] In one example, the control unit is configured to control the heating element 10 to fluctuate between a first preset temperature threshold and a second preset temperature threshold during the preheating period when the heating element 10 rises from an initial temperature to a preset target temperature; wherein the first preset temperature threshold is greater than the second preset temperature threshold.
[0047] The initial temperature can be referred to the previous description; it can be the ambient temperature or a temperature higher than the ambient temperature, such as the residual heat of heating element 10 above the ambient temperature. The preset target temperature can be referred to... Figure 2 Set the preset target temperature T1.
[0048] Specifically, when the real-time temperature of the heating element 10 exceeds the first preset temperature threshold, the control unit controls the power supply 20 to stop supplying power to the heating element 10; for example... Figure 3 The circuit shown controls the first switch Q1 to remain off.
[0049] When the real-time temperature of the heating element 10 is lower than the second preset temperature threshold, the control unit controls the power supply 20 to provide power to the heating element 10 at a preset power. For example... Figure 3 The circuit shown can control the first switch Q1 to remain on, at which time the power supply 20 provides power to the heating element 10 at full power; or it can control the first switch Q1 to be turned on and off intermittently with a certain duty cycle, so that the power supply 20 provides power to the heating element 10 at a certain power.
[0050] In one example, the preheating period includes multiple first time periods, each first time period having a corresponding first preset temperature threshold and a corresponding second preset temperature threshold;
[0051] The control unit is configured to control the heating element 10 to fluctuate between a corresponding first preset temperature threshold and a corresponding second preset temperature threshold in each first time period.
[0052] by Figure 4 For example, the preheating period t01 has n first time periods, where n is between 3 and 8, or between 3 and 6, or between 4 and 6. In the nth first time period t01n, the corresponding first preset temperature threshold is T. n1 The corresponding first preset temperature threshold is T. n2 T n1 >T n2 At this time, the control unit controls the heating element 10 to T n1 With T n2 It fluctuates between [temperatures]. For example, when the real-time temperature of heating element 10 is higher than T... n1When the temperature of the heating element 10 is below T, the control unit controls the power supply 20 to stop supplying power to the heating element 10; when the real-time temperature of the heating element 10 is below T... n2 At this time, the control unit controls the power supply 20 to provide power to the heating element 10 at a preset power.
[0053] By using multiple first time periods, on the one hand, the heating element 10 can be precisely controlled to rapidly rise from the initial temperature to the preset target temperature, reducing the waiting time for the user to take the first puff; on the other hand, the temperature difference between the heating element 10 and the aerosol forming matrix can be increased, improving the heat transfer efficiency between the heating element 10 and the aerosol forming matrix, and improving the baking effect of the aerosol forming matrix.
[0054] In one example, the first preset temperature threshold corresponding to the later first time period is not lower than the first preset temperature threshold corresponding to the previous first time period, and the second preset temperature threshold corresponding to the later first time period is not lower than the second preset temperature threshold corresponding to the previous first time period.
[0055] Still with Figure 4 For example, in the (n-1)th first time interval t01(n-1), the corresponding first preset temperature threshold is T. (n-1)1 The corresponding first preset temperature threshold is T. (n-1)2 T (n-1)1 >T (n-1)2 In the nth first time interval t01n, the corresponding first preset temperature threshold is T. n1 The corresponding first preset temperature threshold is T. n2 T n1 >T n2 Generally, T n1 ≥T (n-1)1 T n2 ≥T (n-1)2 This allows the heating element 10 to quickly rise from its initial temperature to the preset target temperature, reducing the waiting time for the user to take their first puff.
[0056] In one example, the difference between the first preset temperature threshold and the second preset temperature threshold in the later first time period is not less than the difference between the first preset temperature threshold and the second preset temperature threshold in the previous first time period.
[0057] Still with Figure 4 For example, in the (n-1)th first time interval t01(n-1), the corresponding first preset temperature threshold is T. (n-1)1 The corresponding first preset temperature threshold is T. (n-1)2 T (n-1)1 >T (n-1)2 In the nth first time interval t01n, the corresponding first preset temperature threshold is T.n1 The corresponding first preset temperature threshold is T. n2 T n1 >T n2 Generally, T n1 -T n2 ≥T (n-1)1 -T (n-1)2 .
[0058] In a preferred embodiment, the difference between the corresponding first preset temperature threshold and the corresponding second preset temperature threshold remains unchanged throughout all first time periods.
[0059] In one example, during any first time period, the difference between the corresponding first preset temperature threshold and the corresponding second preset temperature threshold is between 5℃ and 15℃, or between 8℃ and 15℃, or between 8℃ and 12℃. The first preset temperature threshold is lower than the preset target temperature.
[0060] Assuming the preheating period t01 has 5 first time periods (t011~t015), the settings for these 5 first time periods can be referenced in the following table:
[0061]
[0062] In one example, the control unit is configured to control the heating element 10 to fluctuate between a third preset temperature threshold and a fourth preset temperature threshold during the heat preservation period of maintaining the preset target temperature; wherein the third preset temperature threshold is greater than the fourth preset temperature threshold.
[0063] Still with Figure 4 For example, during the heat preservation period t12, the corresponding third preset temperature threshold is T3, and the corresponding fourth preset temperature threshold is T4, where T3 > T4. At this time, the control unit controls the heating element 10 to fluctuate between T3 and T4 so that the aerosol forming matrix is fully preheated.
[0064] In one example, the control unit is configured to control the heating element 10 to fluctuate between a fifth preset temperature threshold and a sixth preset temperature threshold during the suction period following the preheating period; wherein the fifth preset temperature threshold is greater than the sixth preset temperature threshold.
[0065] Similar to the preheating period, the above can reduce the frequency of adjusting the heating power during suction, reduce the overall energy consumption of the machine, and avoid generating electromagnetic noise.
[0066] Similar to the preheating period, the preheating period includes multiple second time periods, each of which has a corresponding fifth preset temperature threshold and a corresponding sixth preset temperature threshold;
[0067] The control unit is configured to control the heating element 10 to fluctuate between a corresponding fifth preset temperature threshold and a corresponding sixth preset temperature threshold in each second time period.
[0068] Still with Figure 4 For example, during the suction period t23, there are 6 second time periods, as shown in the figure: t231 to t236. Taking the second time period t231 as an example, the corresponding fifth preset temperature threshold is T. 5-31 The corresponding sixth preset temperature threshold is T. 6-31 T 5-31 >T 6-31 At this time, the control unit controls the heating element 10 to T 5-31 With T 6-31 The temperature fluctuates between these values. Taking the second time period t232 as an example, the corresponding fifth preset temperature threshold is T. 5-32 The corresponding sixth preset temperature threshold is T. 6-32 T 5-32 >T 6-32 At this time, the control unit controls the heating element 10 to T 5-32 With T 6-32 Fluctuations between... Taking the second time period t236 as an example, the corresponding fifth preset temperature threshold is T. 5-36 The corresponding sixth preset temperature threshold is T. 6-36 T 5-36 >T 6-36 At this time, the control unit controls the heating element 10 to T 5-36 With T 6-36 It fluctuates up and down.
[0069] By using multiple second time periods, the temperature of the heating element 10 during the suction stage can be precisely controlled, effectively baking the aerosol forming matrix and improving the user's suction experience.
[0070] In one example, the fifth preset temperature threshold corresponding to the last second time period is greater than the fifth preset temperature threshold corresponding to other second time periods, and the sixth preset temperature threshold corresponding to the next second time period is not higher than the sixth preset temperature threshold corresponding to the previous second time period.
[0071] Still with Figure 4 For example, the fifth preset temperature threshold corresponding to the second time period t236 is T. 5-36 T 5-36 Greater than T 5-31 ~T 5-35 Any one of them, T 6-31 ≥T 6-32 ≥T 6-33 ≥T 6-34 ≥T 6-35 ≥T6-36 .
[0072] Thus, in the initial stage of aspiration, appropriate fifth and sixth preset temperature thresholds can generate a suitable amount of aerosol to satisfy the user's aspiration experience; while in the final stage of aspiration, due to the consumption of the aerosol-forming matrix in aerosol-generating product B, the temperature needs to be appropriately increased to avoid insufficient aerosol generation leading to a decline in the user's aspiration experience.
[0073] In one example, the difference between the fifth preset temperature threshold and the sixth preset temperature threshold in the later second time period is not less than the difference between the fifth preset temperature threshold and the sixth preset temperature threshold in the previous second time period.
[0074] Still with Figure 4 For example, during the six second time periods t23 of the aspiration period, T 5-36 -T 6-36 ≥…≥T 5-32 -T 6-32 ≥T 5-31 -T 6-31 .
[0075] In one example, during any second time period, the difference between the corresponding fifth preset temperature threshold and the corresponding sixth preset temperature threshold is between 15℃ and 55℃, or between 15℃ and 50℃, or between 10℃ and 50℃.
[0076] Still with Figure 4 For example, during the six second time periods (t231~t236) of the aspiration period t23, the following table data can be used as a reference for setting:
[0077]
[0078] In one example, the difference between the fifth preset temperature threshold and the sixth preset temperature threshold in any second time period is not less than the difference between the first preset temperature threshold and the second preset temperature threshold in any first time period.
[0079] Another embodiment of this application provides a control method for an aerosol generating apparatus, which can be referred to in the foregoing description.
[0080] The method S100 includes:
[0081] Step S101: During the preheating period when the heating element rises from the initial temperature to the preset target temperature, the heating element is controlled to fluctuate between a first preset temperature threshold and a second preset temperature threshold; wherein the first preset temperature threshold is greater than the second preset temperature threshold.
[0082] In one example, a temperature sensor is also included for sensing the real-time temperature of the heating element;
[0083] The temperature sensor is positioned close to the heating element, or the heating element can be used as the temperature sensor.
[0084] In one example, the control unit is configured to control the power supply to stop supplying power to the heating element when the real-time temperature of the heating element is higher than the first preset temperature threshold; and to control the power supply to supply power to the heating element at a preset power when the real-time temperature of the heating element is lower than the second preset temperature threshold.
[0085] In one example, the preheating period includes multiple first time periods, each first time period having a corresponding first preset temperature threshold and a corresponding second preset temperature threshold;
[0086] The control unit is configured to control the heating element to fluctuate between a corresponding first preset temperature threshold and a corresponding second preset temperature threshold in each first time period.
[0087] In one example, the first preset temperature threshold corresponding to the later first time period is not lower than the first preset temperature threshold corresponding to the previous first time period, and the second preset temperature threshold corresponding to the later first time period is not lower than the second preset temperature threshold corresponding to the previous first time period.
[0088] In one example, the difference between the first preset temperature threshold and the second preset temperature threshold in the later first time period is not less than the difference between the first preset temperature threshold and the second preset temperature threshold in the previous first time period.
[0089] In one example, the difference between the corresponding first preset temperature threshold and the corresponding second preset temperature threshold remains constant throughout all first time periods.
[0090] In one example, during any first time period, the difference between the corresponding first preset temperature threshold and the corresponding second preset temperature threshold is between 5℃ and 15℃.
[0091] In one example, the control unit is configured to control the heating element to fluctuate between a third preset temperature threshold and a fourth preset temperature threshold during the heat preservation period of maintaining the preset target temperature; wherein the third preset temperature threshold is greater than the fourth preset temperature threshold.
[0092] In one example, the control unit is configured to control the heating element to fluctuate between a fifth preset temperature threshold and a sixth preset temperature threshold during the suction period following the preheating period; wherein the fifth preset temperature threshold is greater than the sixth preset temperature threshold.
[0093] In one example, the preheating period includes multiple second time periods, each second time period having a corresponding fifth preset temperature threshold and a corresponding sixth preset temperature threshold;
[0094] The control unit is configured to control the heating element to fluctuate between a corresponding fifth preset temperature threshold and a corresponding sixth preset temperature threshold in each second time period.
[0095] In one example, the fifth preset temperature threshold corresponding to the last second time period is greater than the fifth preset temperature threshold corresponding to the other second time periods.
[0096] In one example, the sixth preset temperature threshold corresponding to the later second time period is not higher than the sixth preset temperature threshold corresponding to the previous second time period.
[0097] In one example, the difference between the fifth preset temperature threshold and the sixth preset temperature threshold in the later second time period is not less than the difference between the fifth preset temperature threshold and the sixth preset temperature threshold in the previous second time period.
[0098] In one example, during any second time period, the difference between the corresponding fifth preset temperature threshold and the corresponding sixth preset temperature threshold is between 15℃ and 55℃.
[0099] It should be noted that the preferred embodiments of this application are given in the specification and accompanying drawings, but are not limited to the embodiments described in this specification. Furthermore, 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. An aerosol generating device, characterized in that, include: A power source is used to provide electricity; Heating element for heating the aerosol forming matrix to generate aerosols; The control unit is configured to control the heating element to fluctuate between a first preset temperature threshold and a second preset temperature threshold during the preheating period when the heating element rises from an initial temperature to a preset target temperature; wherein the first preset temperature threshold is greater than the second preset temperature threshold.
2. The aerosol generating apparatus as described in claim 1, characterized in that, It also includes a temperature sensor for sensing the real-time temperature of the heating element; The temperature sensor is positioned close to the heating element, or the heating element can be used as the temperature sensor.
3. The aerosol generating apparatus as described in claim 2, characterized in that, The control unit is configured to control the power supply to stop supplying power to the heating element when the real-time temperature of the heating element is higher than the first preset temperature threshold; and to control the power supply to supply power to the heating element at a preset power when the real-time temperature of the heating element is lower than the second preset temperature threshold.
4. The aerosol generating apparatus as described in claim 1, characterized in that, The preheating period includes multiple first time periods, each of which has a corresponding first preset temperature threshold and a corresponding second preset temperature threshold. The control unit is configured to control the heating element to fluctuate between a corresponding first preset temperature threshold and a corresponding second preset temperature threshold in each first time period.
5. The aerosol generating apparatus as described in claim 4, characterized in that, The first preset temperature threshold corresponding to the next first time period is not lower than the first preset temperature threshold corresponding to the previous first time period, and the second preset temperature threshold corresponding to the next first time period is not lower than the second preset temperature threshold corresponding to the previous first time period.
6. The aerosol generating apparatus as described in claim 4, characterized in that, The difference between the first preset temperature threshold and the second preset temperature threshold in the next first time period shall not be less than the difference between the first preset temperature threshold and the second preset temperature threshold in the previous first time period.
7. The aerosol generating apparatus as described in claim 6, characterized in that, Throughout all the first time periods, the difference between the corresponding first preset temperature threshold and the corresponding second preset temperature threshold remains constant.
8. The aerosol generating apparatus as described in claim 4, characterized in that, In any given first time period, the difference between the corresponding first preset temperature threshold and the corresponding second preset temperature threshold is between 5℃ and 15℃.
9. The aerosol generating apparatus as described in claim 1, characterized in that, The control unit is configured to control the heating element to fluctuate between a third preset temperature threshold and a fourth preset temperature threshold during the heat preservation period of maintaining the preset target temperature; wherein the third preset temperature threshold is greater than the fourth preset temperature threshold.
10. The aerosol generating apparatus as described in claim 1, characterized in that, The control unit is configured to control the heating element to fluctuate between a fifth preset temperature threshold and a sixth preset temperature threshold during the suction period following the preheating period; wherein the fifth preset temperature threshold is greater than the sixth preset temperature threshold.
11. The aerosol generating apparatus as described in claim 10, characterized in that, The preheating period includes multiple second time periods, each of which has a corresponding fifth preset temperature threshold and a corresponding sixth preset temperature threshold. The control unit is configured to control the heating element to fluctuate between a corresponding fifth preset temperature threshold and a corresponding sixth preset temperature threshold in each second time period.
12. The aerosol generating apparatus as described in claim 11, characterized in that, The fifth preset temperature threshold corresponding to the last second time period must be greater than the fifth preset temperature threshold corresponding to the other second time periods.
13. The aerosol generating apparatus as described in claim 11, characterized in that, The sixth preset temperature threshold corresponding to the next second time period is not higher than the sixth preset temperature threshold corresponding to the previous second time period.
14. The aerosol generating apparatus as described in claim 11, characterized in that, The difference between the fifth preset temperature threshold and the sixth preset temperature threshold in the next second time period shall not be less than the difference between the fifth preset temperature threshold and the sixth preset temperature threshold in the previous second time period.
15. The aerosol generating apparatus as described in claim 11, characterized in that, In any second time period, the difference between the corresponding fifth preset temperature threshold and the corresponding sixth preset temperature threshold is between 15℃ and 55℃.
16. A control method for an aerosol generating device, characterized in that, The control method includes: During the preheating period when the heating element rises from its initial temperature to a preset target temperature, the heating element is controlled to fluctuate between a first preset temperature threshold and a second preset temperature threshold; wherein the first preset temperature threshold is greater than the second preset temperature threshold.