Aerosol generating device and heating control method therefor

Abstract

The present application discloses an aerosol generating device and a heating control method therefor. The aerosol generating device comprises a heating body, and the heating body is a microwave heating body or a laser heating body. The heating control method comprises: when a heating starting signal for an aerosol generating substrate accommodated in the aerosol generating device is detected, controlling the heating body to heat the aerosol generating substrate, such that the temperature of the aerosol generating substrate rises from the current temperature to a preheating temperature and is maintained until a vaping action occurs; and when the vaping action is detected, controlling the heating body to heat the aerosol generating substrate, such that the temperature of the aerosol generating substrate reaches a corresponding target temperature and is maintained until the next vaping action occurs, wherein the target temperature corresponds to the current number of puffs, the target temperature for the first puff is higher than the preheating temperature and lower than the target temperatures for subsequent puffs. The present application can prevent oral burns during the first puff of aerosol vaping and enhance vaping experience.

Description

Aerosol generating device and heating control method thereof Technical Field

[0001] The present application relates to the technical field of aerosol generation, and in particular to an aerosol generating device and a heating control method thereof. Background Art

[0002] To quickly generate aerosol, existing aerosol generating devices use a heating method that requires heating the aerosol-generating substrate to a relatively high temperature, such as above 250°C, during the preheating phase (0-T1). To prevent a burnt taste, the substrate is then cooled, as shown in Figure 1. Some aerosol generating devices also increase the heating temperature again after the cooling phase to prevent the amount of aerosol from decreasing in the later stages. However, in actual use, the aerosol often becomes overly hot during the first puff, causing a burning sensation in the mouth. Summary of the Invention

[0003] The technical problem to be solved by the present application is to address at least one defect in the related art mentioned in the above background technology: the aerosol generating device heats the aerosol generating substrate to a relatively high temperature during the preheating stage. When the user takes the first puff, the aerosol is often too hot, making the user feel hot in the mouth. An aerosol generating device and a heating control method thereof are provided.

[0004] The technical solution adopted by the present application to solve the technical problem is: a heating control method for an aerosol generating device, wherein the aerosol generating device includes a heating body, and the heating body is a microwave heating body or a laser heating body. The heating control method includes the following steps:

[0005] a preheating step of: upon detecting a heating start signal for the aerosol generating substrate contained in the aerosol generating device, controlling the heating element to heat the aerosol generating substrate so that the temperature of the aerosol generating substrate is raised from a current temperature to a preheating temperature and maintained until a puffing action occurs;

[0006] a puffing and heating step: upon detecting a puffing action, controlling the heating element to heat the aerosol generating substrate so that the temperature of the aerosol generating substrate reaches a corresponding target temperature and is maintained until the next puffing action occurs;

[0007] The target temperature corresponds to the current number of puffs, and the target temperature for the first puff is greater than the preheating temperature and less than or equal to the target temperatures for the other puffs.

[0008] Preferably, the target temperature of the i-th port is greater than or equal to the target temperature of the (i-1)-th port, i=2, 3, 4, ..., N, where N is the puff number threshold.

[0009] Preferably, the difference between the target temperature of the first port and the preheating temperature is greater than the difference between the target temperature of the second port and the target temperature of the first port.

[0010] Preferably, the preheating temperature ranges from 100°C to 188°C.

[0011] Preferably, the suction heating step comprises:

[0012] Heating sub-step: when a puffing action is detected, controlling the heating element to heat the aerosol generating substrate at a first preset power within a first preset time period;

[0013] Temperature control sub-step: after the first preset time period ends, if it is determined that the temperature of the aerosol generating substrate is lower than the target temperature, the heating body is controlled to heat the aerosol generating substrate at a second preset power within a second preset time period; if it is determined that the temperature of the aerosol generating substrate is greater than or equal to the target temperature, the heating body is controlled to stop heating the aerosol generating substrate within a third preset time period; wherein, the second preset power is lower than the first preset power.

[0014] The present application also constructs an aerosol generating device, comprising:

[0015] A heating body, wherein the heating body is a microwave heating body or a laser heating body;

[0016] A control component, the control component being configured to:

[0017] upon detecting a heating start signal for the aerosol-generating substrate contained in the aerosol-generating device, controlling the heating element to heat the aerosol-generating substrate so that the temperature of the aerosol-generating substrate is raised from a current temperature to a preheating temperature and maintained thereat until a puffing action occurs;

[0018] When a puff action is detected, controlling the heating body to heat the aerosol generating substrate so that the temperature of the aerosol generating substrate reaches a corresponding target temperature and is maintained until the next puff action occurs;

[0019] The target temperature corresponds to the current number of puffs, and the target temperature for the first puff is greater than the preheating temperature and less than or equal to the target temperatures for the other puffs.

[0020] Preferably, the control component is configured such that the target temperature of the i-th port is greater than or equal to the target temperature of the (i-1)-th port, i=2, 3, 4, ..., N, where N is the puff number threshold.

[0021] Preferably, the control component is configured such that the preheating temperature ranges from 100°C to 188°C.

[0022] Preferably, the microwave heating body is located on the outer periphery or inside of the aerosol-generating substrate.

[0023] Preferably, the laser heating body is an infrared heating body, and the infrared heating body is located on the outer periphery or inside of the aerosol generating substrate.

[0024] By implementing this application, the following beneficial effects are achieved:

[0025] When the present application detects a heating start signal for the aerosol generating matrix contained in the aerosol generating device, the microwave heating body or the laser heating body is controlled to heat the aerosol generating matrix, so that the temperature of the aerosol generating matrix rises from the current temperature to the preheating temperature and is maintained until the puffing action occurs. Subsequently, when the puffing action is detected, the microwave heating body or the laser heating body is controlled to heat the aerosol generating matrix, so that the temperature of the aerosol generating matrix reaches the corresponding target temperature and is maintained until the next puffing action occurs. Among them, the target temperature corresponds to the current number of puffs. Since the target temperature of the first puff is greater than the preheating temperature and less than the target temperature of the other puffs, the content and temperature of water vapor in the first aerosol can be effectively reduced, avoiding the problem of scalding the mouth caused by the aerosol being too hot when the user takes the first puff, thereby improving the puffing experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0027] FIG1 is a graph showing the relationship between puffing time and the temperature of an aerosol-generating substrate in the related art;

[0028] FIG2 is a flow chart of an embodiment of a heating control method for an aerosol generating device of the present application;

[0029] FIG3 is a schematic diagram of a temperature control curve in an embodiment of the present application;

[0030] FIG4 is a schematic diagram of a temperature control curve and a temperature detection curve in an embodiment of the present application;

[0031] FIG5 is a logical structure diagram of an embodiment of an aerosol generating device of the present application;

[0032] FIG6 is a schematic structural diagram of a microwave heating body in one embodiment of the present application;

[0033] FIG7 is an exploded view of the microwave heating body shown in FIG6;

[0034] FIG8 is a cross-sectional view of the microwave heating body shown in FIG6 with the radiation element located inside the receiving cavity;

[0035] FIG9 is a cross-sectional view of a microwave heating element and an aerosol generating article in cooperation with each other in one embodiment of the present application;

[0036] FIG10 is a schematic structural diagram of an aerosol generating device and an aerosol generating product in cooperation with each other in one embodiment of the present application;

[0037] FIG11 is a cross-sectional view of a heating element in the aerosol generating device shown in FIG10 . DETAILED DESCRIPTION

[0038] In order to have a clearer understanding of the technical features, purposes and effects of this application, the specific implementation methods of this application are now described in detail with reference to the accompanying drawings.

[0039] It should be noted that the flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all content and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0040] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities can be implemented in software or in different networks and / or processor devices and / or microcontroller devices.

[0041] The boiling point of water in the aerosol generating matrix is ​​100°C, the boiling point of PG propylene glycol is 188.2°C, the boiling point of VG glycerol is 290°C, and the boiling point of nicotine is 247°C. In order to quickly generate sufficient aerosol, the relevant aerosol generating device needs to heat the aerosol generating matrix to above 250°C during the preheating stage. The moisture in the aerosol generating matrix will evaporate quickly, and the water vapor with too high a temperature will mix in the aerosol, causing the first breath of aerosol to be hot, and the aerosol generating device will also become hot.

[0042] Therefore, if the temperature of the aerosol generating substrate is lower than or equal to the temperature of the aerosol generating substrate for the rest of the puffs from the start of preheating to the end of the first puff, it is helpful to improve the problem of the first puff being too hot. Therefore, one embodiment of the present application discloses a heating control method for an aerosol generating device, wherein the aerosol generating device includes a heating body for heating the aerosol generating substrate, wherein the heating body is a microwave heating body or a laser heating body, and has good atomization stability and atomized taste.

[0043] In some embodiments, the aerosol-generating substrate is removably accommodated in the aerosol-generating device. The aerosol-generating substrate may be a cylindrical aerosol-generating article. Specifically, the aerosol-generating substrate may be a solid material made from plant leaves and / or stems, and an aroma component may be further added to the solid material. It is understood that in other embodiments, the aerosol-generating substrate may be a sheet-shaped or cylindrical aerosol-generating article, which is not limited here.

[0044] As shown in FIG2 , the heating control method of the aerosol generating device includes a preheating step and a puff heating step, which are specifically as follows:

[0045] Preheating step: Upon detecting a heating activation signal for the aerosol-generating substrate contained in the aerosol-generating device, the heater is controlled to heat the aerosol-generating substrate, raising the temperature of the aerosol-generating substrate from its current temperature to a preheating temperature and maintaining the temperature there until puffing occurs. The current temperature may be room temperature or outdoor ambient temperature, depending on the current state of use of the aerosol-generating device. Under certain conditions, if the aerosol-generating device is in continuous use, the current temperature may be slightly higher than room temperature or ambient temperature.

[0046] Specifically, the aerosol generating device also includes a temperature measuring element for detecting the temperature of the heating element. After the aerosol generating substrate is inserted into the aerosol generating device, it detects a heating start signal generated by a user pressing a button or clicking a touchscreen, thereby initiating preheating and controlling the heating element to heat the aerosol generating substrate. The temperature of the heating element detected by the temperature measuring element is obtained in real time and used as the temperature of the aerosol generating substrate. A determination is made as to whether the temperature has reached the preheating temperature. If so, preheating is complete, and the heating element is controlled to remain at the preheating temperature until puffing occurs. If not, the heating element continues to heat the aerosol generating substrate.

[0047] In some embodiments, as shown in FIG3 , 0 to Time0 is the preheating stage, Time0 is the time when preheating ends, and the preheating stage lasts from 0 to 4 seconds. Temp0 is the preheating temperature, and the preheating temperature ranges from 100°C to 188°C, preferably from 115°C to 125°C. It is understood that in other embodiments, the preheating stage lasts from 0 to 6 seconds or any other time period, and the preheating temperature is 120°C or any other temperature within the preheating temperature range of 100°C to 188°C, without limitation herein.

[0048] Compared with heating by resistance or electromagnetic devices, its preheating time is longer, for example, about 20 seconds, the preheating temperature is higher, for example, 300℃~450℃, and the heating rate and cooling rate are also relatively slow. Therefore, when the relevant aerosol generating device heats the aerosol generating matrix twice in a row, that is, when the user inhales the first aerosol generating matrix and then inserts the second aerosol generating matrix, the continuous high temperature of the heating body in the aerosol generating device will cause the user to feel hot in the first aerosol inhaled when heating the aerosol generating matrix for the second time.

[0049] The heating body of this embodiment is a microwave heating body or a laser heating body, which has a very fast heating speed and can quickly raise the temperature to the preheating temperature within 0 to 4 seconds. It also has a very fast cooling speed. Even if the user finishes inhaling the first aerosol generating matrix and then inserts the second aerosol generating matrix, the heating body in the aerosol generating device will quickly cool down. When heating the aerosol generating matrix for the second time, it will enter a preheating stage with a lower temperature, and the user will not feel a hot sensation when inhaling the first aerosol.

[0050] Puff Heating Step: When a puff is detected, the heater is controlled to heat the aerosol-generating substrate until the temperature reaches the target temperature and is maintained until the next puff. The target temperature corresponds to the current puff count. The target temperature for the first puff is greater than the preheating temperature and less than or equal to the target temperatures for the remaining puffs. Furthermore, the target temperature for the i-th puff is greater than or equal to the target temperature for the (i-1)th puff, where i = 2, 3, 4, ..., N, where N is the puff count threshold.

[0051] Specifically, during a user's puff, the airflow sensor in the aerosol generating device detects changes in airflow pressure, thereby detecting the onset and end of a puff. When a puff is detected, the heating element is controlled to heat the aerosol-generating substrate. The temperature of the heating element, as detected by the temperature measuring element, is obtained in real time as the temperature of the aerosol-generating substrate. A determination is then made as to whether the temperature has reached the target temperature. If so, heating is complete, and the heating element is controlled to maintain the target temperature until the next puff is taken. If not, the heating element continues to heat the aerosol-generating substrate.

[0052] In one specific embodiment, as shown in Table 1, Figures 3 and 4, Table 1 below shows the correspondence between the current number of puffs and the target temperature of the aerosol-generating substrate. In Figure 4, curve L1 represents the puff number curve, L2 represents the temperature curve of the heater (probe), and L3 represents the target temperature curve. The target temperature for the first puff is greater than the preheating temperature and less than the target temperatures for the remaining puffs. Furthermore, the target temperature for the i-th puff is greater than or equal to the target temperature for the (i-1)th puff, where i = 3, 4, ..., N, where N represents the puff number threshold. Specifically, from the start of preheating to the end of the first puff, the aerosol-generating substrate temperature is lower than the aerosol-generating substrate temperature for the remaining puffs. Then, starting from the second puff, the temperature is maintained or increased puff by puff. In the latter stages, due to the decrease in water content in the aerosol-generating substrate, even if the aerosol-generating substrate is heated to a higher temperature, the water vapor is relatively low, and the latter stages do not cause a burning sensation. Preferably, the difference between the target temperature for the first puff and the preheating temperature is greater than the difference between the target temperature for the second puff and the target temperature for the first puff. In some embodiments, the difference between the target temperature of the first port and the preheating temperature is in the range of 100°C to 180°C, preferably 130°C, and the difference between the target temperature of the second port and the target temperature of the first port is in the range of 0°C to 20°C, preferably 2°C. It is understood that in other embodiments, the difference between the target temperature of the first port and the preheating temperature is 150°C or any other temperature in the range of 100°C to 180°C, and the difference between the target temperature of the second port and the target temperature of the first port is 3°C or any other temperature in the range of 0°C to 20°C, without limitation herein.

[0053]

[0054] As shown in Figure 3, Time1~TimeN are the times when the puffing action is detected, and in some embodiments, N is 14. It is understandable that in some other embodiments, N is 20 or any other number, which is not limited here. Temp1 is the target temperature of the first puff, and Temp2 is the target temperature of the second puff, where (Temp1-Temp0)>(Temp2-Temp1). When the puffing action is detected, since the heating body is a microwave heating body or a laser heating body, it has a very fast heating rate and can quickly raise the temperature to the target temperature within about 0.5S, for example, quickly raising it from Temp0 to Temp1. The target temperature of the latter section is maintained or increased puff by puff, which helps to release the effective ingredients of the aerosol-generating matrix and improve the consistency of taste. If the temperature of each subsequent puff remains consistent, the taste of the aerosol in the latter section will become lighter.

[0055] In some embodiments, as shown in FIG3 , the suction heating step includes:

[0056] Heating sub-step: when a puffing action is detected, controlling the heating element to heat the aerosol generating substrate at a first preset power within a first preset time period;

[0057] Temperature Control Sub-Step: After the first preset time period, if the temperature of the aerosol-generating substrate is determined to be less than the target temperature, the heating element is controlled to heat the aerosol-generating substrate at a second preset power for a second preset time period. If the temperature of the aerosol-generating substrate is determined to be greater than or equal to the target temperature, the heating element is controlled to cease heating the aerosol-generating substrate for a third preset time period. The second preset power is less than the first preset power, and the second and third preset time periods are preferably the same, but may be different. It should also be noted that because the duration of a single puff (e.g., 1-2 seconds) minus the constant-power heating time (the first preset time period, e.g., 350 ms) is significantly longer than the temperature detection period (e.g., 20-30 ms), the temperature determination and power adjustment can be repeated multiple times in the temperature control sub-step. For example, if a user's puff lasts 1 second, the first preset time period is 350 ms, the corresponding remaining time is 650 ms, and the temperature detection period is 30 ms, then approximately 22 temperature determinations and power adjustments will be performed in the temperature control sub-step.

[0058] In this embodiment, when the control component controls the heating body, it first performs constant power (first preset power) heating for a period of time (first preset time period) and then periodically performs temperature judgment and power adjustment. Therefore, compared with the traditional PID control scheme, the control scheme of this embodiment can reduce the noise of the aerosol generating device because the differentiator in the PID control scheme is sensitive to the high-frequency signal generated by the microwave heating body or the laser heating body and is prone to amplifying noise signals.

[0059] In one specific embodiment, the first preset time period is, for example, 350 ms, the second preset time period is, for example, 30 ms each, and the third preset time period is, for example, 30 ms each. The first preset power can be the maximum output power, for example, 20 W, and the second preset power is, for example, 10 W. Thus, upon detecting a puff, the heater is first controlled to heat at a constant power of 20 W for 350 ms, causing the temperature of the aerosol-generating substrate to rise. The temperature is then monitored every 30 ms. If the temperature of the aerosol-generating substrate is determined to be less than the target temperature, the heater is controlled to heat at a constant power of 10 W for 30 ms. If the temperature of the aerosol-generating substrate is determined to be greater than or equal to the target temperature, heating is stopped for 30 ms. This cycle of temperature monitoring and power adjustment is repeated until the end of the puff is detected. It should be noted that although heating is stopped when the temperature of the aerosol-generating substrate is determined to be greater than or equal to the target temperature, this process is a millisecond-scale cyclic process. If the temperature of the aerosol-generating substrate is determined to be less than the target temperature, heating is resumed. Therefore, it can be roughly considered that the temperature of the aerosol-generating substrate reaches and is maintained at the corresponding target temperature.

[0060] In one specific embodiment, the first preset time period is, for example, 450ms, the second preset time period is, for example, 30ms, and the third preset time period is, for example, 20ms. The first preset power may be the maximum output power, for example, 20W, and the second preset power is, for example, 10W. Thus, upon detecting a puff, the heater is first controlled to heat at a constant power of 20W for 450ms, thereby increasing the temperature of the aerosol-generating substrate. Temperature detection is then initiated. If the temperature of the aerosol-generating substrate is determined to be less than a target temperature, the heater is controlled to heat at a constant power of 10W for 30ms. If the temperature of the aerosol-generating substrate is determined to be greater than or equal to the target temperature, heating is stopped for 20ms. This cycle of temperature detection and power adjustment is repeated until the end of the puff is detected.

[0061] In some embodiments, the pumping and heating step further includes a calculation step, specifically as follows:

[0062] Calculation steps: When a puff action is detected, the current number of puffs is counted, such as the first puff, the second puff, or the third puff, and the target temperature corresponding to the current number of puffs is obtained.

[0063] In some embodiments, the heating control method of the aerosol generating device further includes a step of stopping heating, specifically as follows:

[0064] Stop heating step: determine whether the current number of puffs reaches a puff threshold, for example, 10 to 16 puffs. If so, control the heater to stop heating the aerosol generating substrate; if not, continue to control the heater to heat the aerosol generating substrate so that the aerosol generating substrate maintains a target temperature corresponding to the current number of puffs until the next puff occurs.

[0065] In some embodiments, the heating control method of the aerosol generating device further includes a timing step and a heating stopping step, as follows:

[0066] Timing steps: start timing when the heating start signal is detected, and count the accumulated heating time when the end of the puffing action is detected.

[0067] Stop heating step: determine whether the cumulative heating time reaches the heating time threshold, for example, the heating time threshold is 4 minutes to 60 minutes. If so, control the heating body to stop heating the aerosol generating substrate; if not, continue to control the heating body to heat the aerosol generating substrate so that the aerosol generating substrate maintains the target temperature corresponding to the current number of puffs until the next puff action occurs.

[0068] In some embodiments, when the end of the puffing action is detected, when it is determined that the time interval after the end of the puffing action is greater than a preset threshold or when a heating stop signal is detected, the heating body is controlled to stop heating the aerosol generating matrix, and when the user wants to puff again subsequently, the preheating step and the puff heating step are re-executed.

[0069] As shown in FIG5 , one embodiment of the present application discloses an aerosol generating device, comprising a heating element and a control component. The heating element is a microwave heating element or a laser heating element, and is used to heat the aerosol generating substrate. The control component is configured to:

[0070] upon detecting a heating start signal for an aerosol generating substrate contained in the aerosol generating device, controlling the heating element to heat the aerosol generating substrate so that the temperature of the aerosol generating substrate is raised from a current temperature to a preheating temperature and maintained thereat until a puffing action occurs;

[0071] When a puff action is detected, the heating element is controlled to heat the aerosol generating substrate so that the temperature of the aerosol generating substrate reaches a corresponding target temperature and is maintained until the next puff action occurs;

[0072] The target temperature corresponds to the current number of puffs, and the target temperature for the first puff is greater than the preheating temperature and less than or equal to the target temperatures for the other puffs.

[0073] Specifically, the aerosol generating device further includes a temperature measuring element, a heating start detection assembly, and a puff detection assembly. The temperature measuring element is used to detect the temperature of the heating element. The heating start detection assembly is used to detect heating start signals and heating stop signals for the aerosol generating substrate contained in the aerosol generating device. The puff detection assembly is used to detect the onset and end of a puff action, and is, for example, an airflow sensor. After the aerosol generating substrate is inserted into the aerosol generating device, the heating start detection assembly detects a heating start signal generated by a user pressing a button or clicking a touch screen, thereby initiating preheating. The control assembly is configured to: control the heating element to heat the aerosol generating substrate, obtain the temperature of the heating element detected by the temperature measuring element in real time as the temperature of the aerosol generating substrate, and determine whether the temperature has reached the preheating temperature. If so, preheating is completed, and the heating element is controlled to remain at the preheating temperature until a puff action occurs; if not, the heating element continues to heat the aerosol generating substrate.

[0074] During a user's puff, the puff detection component in the aerosol generating device detects changes in airflow pressure, thereby detecting the occurrence and end of a puff. When the puff detection component detects a puff, the control component is configured to: control the heater to heat the aerosol-generating substrate; obtain the temperature of the heater detected by the temperature measuring element in real time, using it as the temperature of the aerosol-generating substrate; and determine whether the temperature has reached the target temperature. If so, heating is complete, and the heater is controlled to maintain the target temperature until the next puff occurs; if not, the heater continues to heat the aerosol-generating substrate.

[0075] In some embodiments, the control component is configured such that the target temperature for the i-th puff is greater than or equal to the target temperature for the (i-1)-th puff, where i = 2, 3, 4, ..., N, where N is a puff count threshold. Preferably, the target temperature for the first puff is lower than the target temperatures for the remaining puffs, and the target temperature for the i-th puff is greater than or equal to the target temperature for the (i-1)-th puff, where i = 3, 4, ..., N. Specifically, from the start of preheating to the end of the first puff, the temperature of the aerosol-generating substrate is lower than the temperature of the aerosol-generating substrate for the remaining puffs. Then, starting from the second puff, the temperature is maintained or increased with each puff. In the latter stages of the aerosol-generating substrate, due to the decrease in water content, even if the aerosol-generating substrate is heated to a higher temperature, the water vapor is relatively low, and the sensation of burning in the mouth is avoided in the latter stages.

[0076] In some embodiments, the control component is configured such that a difference between the target temperature of the first port and the preheating temperature is greater than a difference between the target temperature of the second port and the target temperature of the first port.

[0077] In some embodiments, the control component is configured such that the preheating temperature ranges from 100°C to 188°C, preferably from 115°C to 125°C.

[0078] In some embodiments, upon detecting a puff action, controlling the heating element to heat the aerosol-generating substrate so that the temperature of the aerosol-generating substrate reaches a corresponding target temperature and is maintained until the next puff action occurs includes:

[0079] When a puffing action is detected, controlling the heating element to heat the aerosol generating substrate at a first preset power within a first preset time period;

[0080] After the first preset time period, if the temperature of the aerosol-generating substrate is determined to be less than the target temperature, the heating element is controlled to heat the aerosol-generating substrate at a second preset power for a second preset time period. If the temperature of the aerosol-generating substrate is determined to be greater than or equal to the target temperature, the heating element is controlled to cease heating the aerosol-generating substrate for a third preset time period. The second preset power is less than the first preset power, and the second and third preset time periods are preferably the same, but may also be different. It should also be noted that because the duration of a single puff (e.g., 1-2 seconds) minus the constant-power heating time (the first preset time period, e.g., 350 ms) is significantly longer than the temperature detection period (e.g., 20-30 ms), multiple cycles of temperature determination and power adjustment may be performed during this phase. For example, if a user's puff lasts 1 second, the first preset time period is 350 ms, the corresponding remaining time is 650 ms, and the temperature detection period is 30 ms, approximately 22 temperature determinations and power adjustments will be performed during this phase.

[0081] In this embodiment, when the control component controls the heating body, it first performs constant power (first preset power) heating for a period of time (first preset time period) and then periodically performs temperature judgment and power adjustment. Therefore, compared with the traditional PID control scheme, the control scheme of this embodiment can reduce the noise of the aerosol generating device because the differentiator in the PID control scheme is sensitive to the high-frequency signal generated by the microwave heating body or the laser heating body and is prone to amplifying noise signals.

[0082] In one specific embodiment, the first preset time period is, for example, 350 ms, the second preset time period is, for example, 30 ms each, and the third preset time period is, for example, 30 ms each. The first preset power can be the maximum output power, for example, 20 W, and the second preset power is, for example, 10 W. Thus, upon detecting a puff, the heater is first controlled to heat at a constant power of 20 W for 350 ms, causing the temperature of the aerosol-generating substrate to rise. The temperature is then monitored every 30 ms. If the temperature of the aerosol-generating substrate is determined to be less than the target temperature, the heater is controlled to heat at a constant power of 10 W for 30 ms. If the temperature of the aerosol-generating substrate is determined to be greater than or equal to the target temperature, heating is stopped for 30 ms. This cycle of temperature monitoring and power adjustment is repeated until the end of the puff is detected. It should be noted that although heating is stopped when the temperature of the aerosol-generating substrate is determined to be greater than or equal to the target temperature, this process is a millisecond-scale cyclic process. If the temperature of the aerosol-generating substrate is determined to be less than the target temperature, heating is resumed. Therefore, it can be roughly considered that the temperature of the aerosol-generating substrate reaches and is maintained at the corresponding target temperature.

[0083] In one specific embodiment, the first preset time period is, for example, 450ms, the second preset time period is, for example, 30ms, and the third preset time period is, for example, 20ms. The first preset power may be the maximum output power, for example, 20W, and the second preset power is, for example, 10W. Thus, upon detecting a puff, the heater is first controlled to heat at a constant power of 20W for 450ms, thereby increasing the temperature of the aerosol-generating substrate. Temperature detection is then initiated. If the temperature of the aerosol-generating substrate is determined to be less than a target temperature, the heater is controlled to heat at a constant power of 10W for 30ms. If the temperature of the aerosol-generating substrate is determined to be greater than or equal to the target temperature, heating is stopped for 20ms. This cycle of temperature detection and power adjustment is repeated until the end of the puff is detected.

[0084] In some embodiments, the control component is configured to: when a puff action is detected, count the current number of puffs, such as the first puff, the second puff, or the third puff, and obtain the target temperature corresponding to the current number of puffs.

[0085] In some embodiments, the control component is configured to: determine whether the current number of puffs reaches a puff number threshold, the puff number threshold being, for example, 10 to 16 times; if so, control the heating body to stop heating the aerosol generating substrate; if not, continue to control the heating body to heat the aerosol generating substrate so that the aerosol generating substrate maintains a target temperature corresponding to the current number of puffs until the next puff action occurs.

[0086] In some embodiments, the control component is configured to: start timing when a heating start signal is detected, count the cumulative heating time when the end of the puffing action is detected, and determine whether the cumulative heating time reaches a heating time threshold, for example, the heating time threshold is 4 minutes to 60 minutes. If so, control the heating body to stop heating the aerosol generating matrix; if not, continue to control the heating body to heat the aerosol generating matrix so that the aerosol generating matrix maintains the target temperature corresponding to the current number of puffs until the next puffing action occurs.

[0087] In some embodiments, the microwave heating element is located around the outer periphery of the aerosol-generating substrate. Specifically, as shown in Figure 6, the aerosol-generating device includes a microwave heating element 1 and a microwave generator (not shown). The microwave heating element 1 includes an inner conductor unit 11, an outer conductor unit 12, a receiving receptacle 13, and a microwave feed unit (not shown). As shown in Figures 7 and 8, the outer conductor unit 12 has a cavity 121. The inner conductor unit 11 is disposed within the cavity 121 of the outer conductor unit 12 and ensures good ohmic contact with the outer conductor unit 12. The receiving receptacle 13 is used to accommodate the aerosol-generating article. The microwave feed unit is used to feed the microwaves generated by the microwave generator into the outer conductor unit 12 and the inner conductor unit 11. After microwaves are fed into the microwave heating element 1, a microwave field is formed around the outer periphery of the aerosol-generating article. This microwave field can act on the aerosol-generating article, achieving microwave heating.

[0088] As shown in Figures 7 and 8, the outer conductor unit 12 is cylindrical, having a closed end 122 and an open end 123 opposite to the closed end 122. A semi-enclosed cavity 121 is defined between the open end 123 and the closed end 122, and the receiving seat 13 extends into the cavity 121.

[0089] One end of the inner conductor unit 11 is connected to the closed end 122 of the outer conductor unit 12, forming ohmic contact therewith. The other end of the inner conductor unit 11 extends toward the open end 123 of the outer conductor unit 12. The receiving receptacle 13 is connected to the open end 123 and includes a receiving cavity 131 for receiving the aerosol-generating article. The receiving cavity 131 is disposed within the cavity 121 of the outer conductor unit 12.

[0090] The inner conductor unit 11 includes a conductor structure 111 and a radiating structure 112. The conductor structure 111 is disposed within a cavity 121, and its outer diameter is smaller than the inner diameter of the outer conductor unit 12. The conductor structure 111 includes a fixed end and a free end, with the fixed end being fixed to the outer conductor unit 12 and in ohmic contact with the outer conductor unit 12. The conductor structure 111 primarily serves as a microwave conductor and, in some embodiments, may be cylindrical. The end distal to the open end 123 of the outer conductor unit 12 is a fixed end that can be fixedly connected to the bottom 124 of the outer conductor unit 12. The end proximal to the open end 123 is a free end that extends toward the open end 123 of the outer conductor unit 12.

[0091] The radiating structure 112 can be coupled to the free end of the conductor structure 111. The radiating structure 112 is located outside the aerosol-generating article and can be disposed along the periphery of the end surface of the conductor structure 111 opposite the receptacle 13. In some embodiments, the radiating structure 112 includes at least one radiating element 1121 and a base 1122 connected to the at least one radiating element 1121. The radiating structure 112 makes ohmic contact with the free end of the conductor structure 111 via the base 1122. The at least one radiating element 1121 is disposed circumferentially around the base 1122 and distributed within the interior of the receiving cavity 131, conforming to either the inner or outer wall of the receiving cavity 131 to more evenly distribute the microwave field around the receiving cavity 131. When the aerosol-generating article is contained within the receiving cavity 131, the at least one radiating element 1121 is located around the outer periphery of the aerosol-generating article, forming a microwave field around the outer periphery of the aerosol-generating article. It is understandable that some other embodiments may include at least two, three or any number of radiation elements 1121, and the radiation element 1121 is a probe, which is not limited here.

[0092] In some embodiments, the microwave heating element is located within the aerosol-generating substrate. Specifically, as shown in FIG9 , the aerosol-generating device includes a microwave heating element 1a and a microwave generator (not shown). The microwave heating element 1a includes an inner conductor unit 11a, an outer conductor unit 12a, a receiving seat 13a, and a microwave feeding unit 14a.

[0093] The outer conductor unit 12a is cylindrical and has a closed end 122a and an open end 123a opposite to the closed end 122a. A semi-enclosed cavity 121a is defined between the open end 123a and the closed end 122a. The receiving seat 13a extends into the cavity 121a.

[0094] The inner conductor unit 11a includes a conductor structure 111a and a radiating structure 112a coupled to the conductor structure 111a. In some embodiments, the radiating structure 112 is a probe. The bottom of the conductor structure 111a is connected to the closed end 122a of the outer conductor unit 12a and makes ohmic contact with the end wall of the closed end 122a, forming the short-circuit end of the microwave heating body 1a. One end of the radiating structure 112a is coupled to the top of the conductor structure 111a, and the other end of the radiating structure 112a is located in the cavity 121a but does not directly contact the outer conductor unit 12a, forming the open-circuit end of the microwave heating body 1a. The microwave feeding unit 14a is detachably mounted on the outer conductor unit 12a and is used to feed the microwaves generated by the microwave generating assembly into the cavity 121a. The receiving seat 13a is fixedly or detachably mounted at the open end 123a of the outer conductor unit 12a, defining a receiving cavity 131a for receiving the aerosol generating product 2a. An end of the radiating structure 112a away from the conductor structure 111a extends and is inserted into the receiving cavity 131a.

[0095] The aerosol generating product 2a can be partially / completely inserted into the receiving cavity 131a. At this time, part of the structure of the radiation structure 112a is inserted into the interior of the aerosol generating product 2a. When the microwave generating assembly feeds microwaves to the microwave heating body 1a through the microwave feeding unit 14a, a microwave energy field can be formed around the radiation structure 112a to heat the interior of the aerosol generating product 2a.

[0096] In some embodiments, the laser heater is an infrared heater that radiates infrared light around the periphery or inside the aerosol-generating substrate. The infrared light is used to heat the aerosol-generating substrate. Specifically, as shown in Figures 10 and 11, the aerosol-generating device includes an infrared heater 3 and a power supply assembly 4 for powering the infrared heater 3. The infrared heater 3 can be partially inserted into the interior of the aerosol-generating article 2, or at least one infrared heater 3 can be located on the periphery of the aerosol-generating article 2. It is understood that in other embodiments, there can be at least two, three, or any number of infrared heaters 3, which are not limited here. When powered on, the infrared heater 3 generates infrared light to heat the dielectric section of the aerosol-generating article 2, causing it to atomize and produce an aerosol.

[0097] The infrared heater 3 comprises a tube 31, a heating element 32, and a base 33. The tube 31 houses at least a portion of the heating element 32, allowing infrared light emitted by the heating element 32 to pass through, thereby heating the aerosol-generating article 2. The base 33 is disposed at the opening 311 of the tube 31 and is used to secure the tube 31. The heating element 32 comprises a heating base and an infrared radiation layer disposed on the outer surface of the base. When powered and heated, the heating base excites the infrared radiation layer to generate and radiate infrared light.

[0098] By implementing this application, the following beneficial effects are achieved:

[0099] When the present application detects a heating start signal for the aerosol generating matrix contained in the aerosol generating device, the microwave heating body or the laser heating body is controlled to heat the aerosol generating matrix, so that the temperature of the aerosol generating matrix rises from the current temperature to the preheating temperature and is maintained until the puffing action occurs. Subsequently, when the puffing action is detected, the microwave heating body or the laser heating body is controlled to heat the aerosol generating matrix, so that the temperature of the aerosol generating matrix reaches the corresponding target temperature and is maintained until the next puffing action occurs. Among them, the target temperature corresponds to the current number of puffs. Since the target temperature of the first puff is greater than the preheating temperature and less than the target temperature of the other puffs, the content and temperature of water vapor in the first aerosol can be effectively reduced, avoiding the problem of scalding the mouth caused by the aerosol being too hot when the user takes the first puff, thereby improving the puffing experience.

[0100] It can be understood that the above embodiments only express some implementation methods of the present application, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present application. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made, which all fall within the scope of protection of the present application, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments; therefore, all equivalent changes and modifications made to the scope of the claims of the present application should fall within the scope of coverage of the claims of the present application.

Claims

1. A heating control method for an aerosol generating device, characterized in that: The aerosol generating device comprises a heating body, which is a microwave heating body or a laser heating body, and the heating control method comprises the following steps: Preheating step: when a heating start signal for the aerosol generating substrate contained in the aerosol generating device is detected, controlling the heating body to heat the aerosol generating substrate so that the temperature of the aerosol generating substrate rises from the current temperature to the preheating temperature and is maintained until the inhalation action occurs; Puffing and heating step: when a puffing action is detected, controlling the heating body to heat the aerosol generating substrate so that the temperature of the aerosol generating substrate reaches a corresponding target temperature and is maintained until the next puffing action occurs; The target temperature corresponds to the current number of puffs, and the target temperature of the first puff is greater than the preheating temperature and less than or equal to the target temperatures of other puffs.

2. The heating control method of an aerosol generating device according to claim 1, characterized in that: The target temperature of the i-th port is greater than or equal to the target temperature of the (i-1)-th port, i=2, 3, 4, ..., N, where N is the puff number threshold.

3. The heating control method of an aerosol generating device according to claim 1, characterized in that: A difference between the target temperature of the first port and the preheating temperature is greater than a difference between the target temperature of the second port and the target temperature of the first port.

4. The heating control method of an aerosol generating device according to claim 1, characterized in that: The preheating temperature ranges from 100°C to 188°C.

5. The heating control method of an aerosol generating device according to claim 1, characterized in that: The suction heating step comprises: Heating sub-step: when a puffing action is detected, controlling the heating body to heat the aerosol generating substrate at a first preset power within a first preset time period; Temperature control sub-step: after the first preset time period ends, if it is determined that the temperature of the aerosol generating substrate is lower than the target temperature, the heating body is controlled to heat the aerosol generating substrate at a second preset power within a second preset time period; if it is determined that the temperature of the aerosol generating substrate is greater than or equal to the target temperature, the heating body is controlled to stop heating the aerosol generating substrate within a third preset time period; wherein the second preset power is lower than the first preset power.

6. An aerosol generating device, characterized in that: include: A heating body, wherein the heating body is a microwave heating body or a laser heating body; A control component, wherein the control component is configured to: When a heating start signal for the aerosol generating substrate contained in the aerosol generating device is detected, the heating body is controlled to heat the aerosol generating substrate so that the temperature of the aerosol generating substrate is increased from the current temperature to the preheating temperature and maintained until the puffing action occurs; When a puffing action is detected, controlling the heating body to heat the aerosol generating substrate so that the temperature of the aerosol generating substrate reaches a corresponding target temperature and is maintained until the next puffing action occurs; The target temperature corresponds to the current number of puffs, and the target temperature of the first puff is greater than the preheating temperature and less than or equal to the target temperatures of other puffs.

7. The aerosol generating device according to claim 6, characterized in that: The control component is configured such that: the target temperature of the i-th puff is greater than or equal to the target temperature of the (i-1)-th puff, i=2, 3, 4, ..., N, where N is a puff number threshold.

8. The aerosol generating device according to claim 6, characterized in that: The control component is configured such that the preheating temperature ranges from 100°C to 188°C.

9. The aerosol generating device according to claim 6, characterized in that: The microwave heating body is located at the outer periphery or inside of the aerosol generating substrate.

10. The aerosol generating device according to claim 6, characterized in that: The laser heating body is an infrared heating body, and the infrared heating body is located on the outer periphery or inside of the aerosol generating substrate.

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