WO2025103074A1 - Aerosol generating device and heating control method therefor - Google Patents

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

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

In order to quickly generate aerosols, the existing aerosol generating devices need to heat the aerosol generating matrix to a relatively high temperature, such as above 250°C, during the preheating stage (0-T1), and then cool it down to prevent the mouthfeel from being burnt, as shown in Figure 1. Some aerosol generating devices also increase the heating temperature again after the cooling stage in order to prevent the amount of aerosol in the later stage from decaying. However, in actual applications, it is found that when users take the first puff, the aerosol is often too hot, which makes the user feel hot in the mouth.

Summary of the invention

The technical problem to be solved by the present application is that, in view of at least one defect of the related technology mentioned in the above background technology: the aerosol generating device heats the aerosol generating matrix to a relatively high temperature during the preheating stage, and 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.

The technical solution adopted by the present application to solve the technical problem is: a heating control method of an aerosol generating device, the aerosol generating device includes a heating body, the heating body is a microwave heating body or a laser heating body, and the heating control method includes 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.

Preferably, 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 the puff number threshold.

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.

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

Preferably, 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.

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

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.

Preferably, 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 the puff number threshold.

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

Preferably, the microwave heating body is located at the outer periphery or inside of the aerosol generating substrate.

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.

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

When the 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 numbers of 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

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

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

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

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

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

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

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

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

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

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

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;

FIG. 11 is a cross-sectional view of a heating element in the aerosol generating device shown in FIG. 10 .

DETAILED DESCRIPTION

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

It should be noted that the flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations/steps, nor do they have to be executed in the order described. For example, some operations/steps can be decomposed, while some operations/steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

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

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 water 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 to be hot, and the aerosol generating device will also become hot.

Therefore, if the temperature of the aerosol generating substrate is lower than or equal to the temperature of the aerosol generating substrate of other puffs during the whole process from the start of preheating to the end of the first puff, it is helpful to improve the problem of overheating of the first puff. Therefore, an embodiment of the present application discloses a heating control method for an aerosol generating device. The aerosol generating device includes a heating body for heating the aerosol generating substrate. The heating body is a microwave heating body or a laser heating body, and has good atomization stability and atomization taste.

In some embodiments, the aerosol generating substrate can be pluggably accommodated in the aerosol generating device, and the aerosol generating substrate can be a columnar aerosol generating product. Specifically, the aerosol generating substrate can be a solid material made of plant leaves and/or stems, and aroma components can be further added to the solid material. It can be understood that in some other embodiments, the aerosol generating substrate can be a sheet-shaped or cylindrical aerosol generating product, which is not limited here.

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

Preheating step: 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 rises from the current temperature to the preheating temperature and is maintained until the puffing action occurs. The current temperature may be room temperature or outdoor ambient temperature according to the current use state of the aerosol generating device. Under some conditions, if the aerosol generating device is in continuous use, the current temperature may also be slightly higher than the room temperature or ambient temperature.

Specifically, the aerosol generating device also includes a temperature measuring element for detecting the temperature of the heating body. After the aerosol generating substrate is inserted into the aerosol generating device, a heating start signal generated by a user pressing a button or clicking a touch screen is detected, thereby starting preheating, controlling the heating body to heat the aerosol generating substrate, and obtaining the temperature of the heating body detected by the temperature measuring element in real time as the temperature of the aerosol generating substrate, and judging whether the temperature reaches the preheating temperature. If so, the preheating is completed, and the heating body is controlled to remain at the preheating temperature until before the puffing action occurs; if not, the heating body continues to be controlled to heat the aerosol generating substrate.

In some embodiments, as shown in FIG3 , 0 to Time0 is the preheating stage, Time0 is the time when the preheating ends, and the preheating stage is 0 to 4S. Temp0 is the preheating temperature, and the temperature range of the preheating temperature is 100°C to 188°C, preferably 115°C to 125°C. It can be understood that in some other embodiments, the preheating stage is 0 to 6S or other arbitrary time periods, and the preheating temperature is 120°C or any other temperature within the preheating temperature range of 100°C to 188°C, which is not limited here.

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 make the first aerosol inhaled by the user often feel hot when the aerosol generating matrix is heated for the second time.

The heating body of the present 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 0-4 seconds. It also has a very fast cooling speed. Even if the user inhales 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 hot in the first aerosol inhaled.

Puffing and heating step: When a puffing action is detected, the heating body is controlled to heat the aerosol generating substrate so that the temperature of the aerosol generating substrate reaches the corresponding target temperature and is maintained until the next puffing action occurs. The target temperature corresponds to the current number of puffs, the target temperature of the first puff is greater than the preheating temperature, and less than or equal to the target temperature of the other puffs. In addition, 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, N is the puff number threshold.

Specifically, during the user's inhalation, the airflow sensor in the aerosol generating device will detect the change in air pressure of the airflow, thereby detecting the occurrence and end of the inhalation action. When the inhalation action is detected, the heating body is controlled to heat the aerosol generating matrix, and the temperature of the heating body detected by the temperature measuring element is obtained in real time as the temperature of the aerosol generating matrix to determine whether the temperature reaches the target temperature. If so, the heating is completed, and the heating body is controlled to remain at the target temperature until the next inhalation action occurs; if not, the heating body continues to be controlled to heat the aerosol generating matrix.

In a specific embodiment, as shown in Table 1, FIG. 3 and FIG. 4, Table 1 below shows the corresponding relationship between the current number of puffs and the target temperature of the aerosol generating substrate. In FIG. 4, curve L1 is the puff number curve, L2 is the temperature curve of the heating body (probe), and L3 is the target temperature curve, wherein the target temperature of the first puff is greater than the preheating temperature and less than the target temperature of the other puffs, and the target temperature of the i-th puff is greater than or equal to the target temperature of the (i-1)th puff, i=3, 4, ..., N, and N is the puff number threshold. 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 of the other puffs throughout the process, and then the temperature is maintained or increased puff by puff starting from the second puff. In the latter stage, due to the reduction of water content in the aerosol generating substrate, even if the aerosol generating substrate is heated to a higher temperature, the water vapor is less, and there will be no feeling of burning in the latter stage. Preferably, the difference between the target temperature of the first puff and the preheating temperature is greater than the difference between the target temperature of the second puff and the target temperature of 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 can be understood that in some 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 difference 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 difference range of 0°C to 20°C, which is not limited here.

As shown in Figure 3, Time1~TimeN is the time when the puffing action is detected, and N is 14 in some embodiments. It can be understood 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. The temperature can be quickly raised to the target temperature within about 0.5S, for example, from Temp0 to Temp1. The target temperature of the latter section is maintained or increased from mouth to mouth, which is conducive to the release of the effective ingredients of the aerosol-generated matrix and improves 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.

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

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 judged that the temperature of the aerosol generating substrate is less than the target temperature, the heating body is controlled to heat the aerosol generating substrate with the second preset power within the second preset time period; if it is judged 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 the third preset time period; wherein, the second preset power is less than the first preset power, and the second preset time period and the third preset time period are preferably the same, but of course they can also be different. It should also be noted that since the remaining time after the duration of a puffing action (e.g., 1-2s) minus the time of constant power heating (the first preset time period, e.g., 350ms) is much longer than the cycle of temperature detection (e.g., 20-30ms), in the temperature control sub-step, the temperature judgment and power adjustment can be performed repeatedly. For example, if the duration of a puffing action of a user is 1s, the first preset time period is 350ms, the corresponding remaining time is 650ms, and the cycle of temperature detection is 30ms, then the temperature judgment and power adjustment are performed about 22 times in the temperature control sub-step.

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 easy to amplify the noise signal.

In a specific embodiment, the first preset time period is, for example, 350ms, the second preset time period and the third preset time period are, for example, 30ms respectively, the first preset power can be the maximum output power, for example, 20W, and the second preset power is, for example, 10W. In this way, when the puffing action is detected, the heating body is first controlled to heat for 350ms at a constant power of 20W, so that the temperature of the aerosol generating substrate rises. Then the temperature is detected every 30ms. If it is judged that the temperature of the aerosol generating substrate is less than the target temperature, the heating body is controlled to heat for 30ms at a constant power of 10W; if it is judged that the temperature of the aerosol generating substrate is greater than or equal to the target temperature, the heating is stopped for 30ms. In this way, the temperature detection and power adjustment are repeated until the end of the puffing action is detected. It should be noted here that although the heating is stopped when it is judged that the temperature of the aerosol generating substrate is greater than or equal to the target temperature, the process is a ms-level cyclic process. Once it is judged that the temperature of the aerosol generating substrate is less than the target temperature, the heating is performed again. Therefore, it can be approximately regarded as the temperature of the aerosol generating substrate reaching the corresponding target temperature and maintaining it.

In a 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. In this way, when the puffing action is detected, the heating body is first controlled to heat at a constant power of 20W for 450ms, so that the temperature of the aerosol generating substrate rises. Then the temperature is detected. If it is judged that the temperature of the aerosol generating substrate is less than the target temperature, the heating body is controlled to heat at a constant power of 10W for 30ms; if it is judged that the temperature of the aerosol generating substrate is greater than or equal to the target temperature, the heating is stopped for 20ms. The temperature detection and power adjustment are repeated in this way until the end of the puffing action is detected.

In some embodiments, the suction and heating step further includes a calculation step, which is as follows:

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.

In some embodiments, the heating control method of the aerosol generating device further includes a step of stopping heating, which is as follows:

Stop heating step: determine whether the current number of puffs reaches the puff number threshold, the puff number threshold is, 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 the target temperature corresponding to the current number of puffs until the next puff action occurs.

In some embodiments, the heating control method of the aerosol generating device further includes a timing step and a heating stop step, which are specifically as follows:

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.

Stop heating step: determine whether the cumulative heating time reaches the heating time threshold, for example, the heating time threshold is 4min~60min. 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 puff action occurs.

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.

As shown in FIG5 , an embodiment of the present application discloses an aerosol generating device, including a heating body and a control component. The heating body is a microwave heating body or a laser heating body, which is used to heat the aerosol generating substrate. The control component is configured as follows:

When a heating start signal for an 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, the heating body 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 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 the other puffs.

Specifically, the aerosol generating device further includes a temperature measuring element, a heating start detection component and a suction detection component. The temperature measuring element is used to detect the temperature of the heating body. The heating start detection component is used to detect the heating start signal and the heating stop signal of the aerosol generating substrate contained in the aerosol generating device. The suction detection component is used to detect the occurrence and end of the suction action, for example, an airflow sensor. After the aerosol generating substrate is inserted into the aerosol generating device, the heating start detection component will detect the heating start signal generated by the user pressing a button or clicking the touch screen, thereby starting preheating, and the control component is configured to: control the heating body to heat the aerosol generating substrate, obtain the temperature of the heating body detected by the temperature measuring element in real time as the temperature of the aerosol generating substrate, and judge whether the temperature reaches the preheating temperature. If so, the preheating is completed, and the heating body is controlled to remain at the preheating temperature until the suction action occurs; if not, the heating body continues to be controlled to heat the aerosol generating substrate.

During the user's puffing process, the puff detection component in the aerosol generating device will detect the change in air pressure of the airflow, thereby detecting the occurrence and end of the puffing action. When the puff detection component detects the occurrence of the puffing action, the control component is configured to: control the heating body to heat the aerosol generating matrix, obtain the temperature of the heating body detected by the temperature measuring element in real time as the temperature of the aerosol generating matrix, and determine whether the temperature reaches the target temperature. If so, the heating is completed, and the heating body is controlled to remain at the target temperature until the next puffing action occurs; if not, the heating body continues to be controlled to heat the aerosol generating matrix.

In some embodiments, 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 the puff number threshold. Preferably, the target temperature of the first puff is less than the target temperature of the other puffs, the target temperature of the i-th puff is greater than or equal to the target temperature of the (i-1)-th puff, 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 of the other puffs throughout the process, and then the temperature is maintained or increased puff by puff starting from the second puff. In the latter stage, due to the reduction of water content in the aerosol generating substrate, even if the aerosol generating substrate is heated to a higher temperature, there is less water vapor, and there is no feeling of burning in the mouth in the latter stage.

In some embodiments, the control component is configured such that 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.

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.

In some embodiments, 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, comprises:

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;

After the first preset time period ends, if it is judged that the temperature of the aerosol generating substrate is less than the target temperature, the heating body is controlled to heat the aerosol generating substrate with the second preset power within the second preset time period; if it is judged 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 the third preset time period; wherein, the second preset power is less than the first preset power, and the second preset time period and the third preset time period are preferably the same, but of course they can also be different. It should also be noted that, since the remaining time after the duration of a puffing action (e.g., 1-2s) minus the time of constant power heating (the first preset time period, e.g., 350ms) is much longer than the cycle of temperature detection (e.g., 20-30ms), the temperature judgment and power adjustment can be repeated multiple times in this stage. For example, if the duration of a user's puffing action is 1s, the first preset time period is 350ms, the corresponding remaining time is 650ms, and the cycle of temperature detection is 30ms, then about 22 temperature judgments and power adjustments are performed in this stage.

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 easy to amplify the noise signal.

In a specific embodiment, the first preset time period is, for example, 350ms, the second preset time period and the third preset time period are, for example, 30ms respectively, the first preset power can be the maximum output power, for example, 20W, and the second preset power is, for example, 10W. In this way, when the puffing action is detected, the heating body is first controlled to heat for 350ms at a constant power of 20W, so that the temperature of the aerosol generating substrate rises. Then the temperature is detected every 30ms. If it is judged that the temperature of the aerosol generating substrate is less than the target temperature, the heating body is controlled to heat for 30ms at a constant power of 10W; if it is judged that the temperature of the aerosol generating substrate is greater than or equal to the target temperature, the heating is stopped for 30ms. In this way, the temperature detection and power adjustment are repeated until the end of the puffing action is detected. It should be noted here that although the heating is stopped when it is judged that the temperature of the aerosol generating substrate is greater than or equal to the target temperature, the process is a ms-level cyclic process. Once it is judged that the temperature of the aerosol generating substrate is less than the target temperature, the heating is performed again. Therefore, it can be approximately regarded as the temperature of the aerosol generating substrate reaching the corresponding target temperature and maintaining it.

In a 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. In this way, when the puffing action is detected, the heating body is first controlled to heat at a constant power of 20W for 450ms, so that the temperature of the aerosol generating substrate rises. Then the temperature is detected. If it is judged that the temperature of the aerosol generating substrate is less than the target temperature, the heating body is controlled to heat at a constant power of 10W for 30ms; if it is judged that the temperature of the aerosol generating substrate is greater than or equal to the target temperature, the heating is stopped for 20ms. The temperature detection and power adjustment are repeated in this way until the end of the puffing action is detected.

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.

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 is, for example, 10 to 16 times, and 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.

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.

In some embodiments, the microwave heating body is on the outer periphery of the aerosol generating substrate. Specifically, as shown in FIG6 , the aerosol generating device includes a microwave heating body 1 and a microwave generator (not shown), and the microwave heating body 1 includes an inner conductor unit 11, an outer conductor unit 12, a receiving seat 13 and a microwave feeding unit (not shown). As shown in FIG7 and FIG8 , the outer conductor unit 12 has a cavity 121, the inner conductor unit 11 is arranged in the cavity 121 of the outer conductor unit 12, and can have good ohmic contact with the outer conductor unit 12, and the receiving seat 13 is used to receive the aerosol generating product. The microwave feeding unit is used to feed the microwaves generated by the microwave generator into the outer conductor unit 12 and the inner conductor unit 11. The microwave heating body 1 can form a microwave field after microwave feeding, surrounding the outer periphery of the aerosol generating product, and the microwave field can act on the aerosol generating product to achieve microwave heating thereof.

As shown in FIGS. 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 .

One end of the inner conductor unit 11 is connected to the closed end 122 of the outer conductor unit 12, and the inner conductor unit 11 is in ohmic contact with the closed end 122 of the outer conductor unit 12, and the other end extends toward the open end 123 of the outer conductor unit 12. The receiving seat 13 is connected to the open end 123 and includes a receiving cavity 131 for receiving the aerosol generating product, and the receiving cavity 131 is disposed in the cavity 121 of the outer conductor unit 12.

The inner conductor unit 11 includes a conductor structure 111 and a radiation structure 112. The conductor structure 111 is disposed in the cavity 121, and the outer diameter of the conductor structure 111 is smaller than the inner diameter of the outer conductor unit 12. The conductor structure 111 includes a fixed end and a free end opposite to each other. The fixed end is fixed to the outer conductor unit 12 and is in ohmic contact with the outer conductor unit 12. The conductor structure 111 mainly plays a role in microwave conduction. In some embodiments, the conductor structure 111 may be cylindrical. The end thereof away from the open end 123 of the outer conductor unit 12 is a fixed end, which may be fixedly connected to the bottom 124 of the outer conductor unit 12. The end thereof close to the open end 123 is a free end, which extends toward the open end 123 of the outer conductor unit 12.

The radiation structure 112 may be combined with the free end of the conductor structure 111. The radiation structure 112 is located outside the aerosol generating product and may be arranged along the periphery of the end surface of the conductor structure 111 opposite to the receiving seat 13. In some embodiments, the radiation structure 112 includes at least one radiation element 1121 and a base 1122 connected to the at least one radiation element 1121. The radiation structure 112 is in ohmic contact with the free end of the conductor structure 111 via the base 1122. At least one radiation element 1121 is arranged on the circumference of the base 1122. At least one radiation element 1121 is distributed inside the receiving cavity 131 and fits with the inner wall surface or the outer wall surface of the receiving cavity 131, so that the microwave field is more evenly distributed around the receiving cavity 131. When the aerosol generating product is received in the receiving cavity 131, at least one radiation element 1121 is located on the outer periphery of the aerosol generating product, and a microwave field is formed on the outer periphery of the aerosol generating product. It can be understood 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.

In some embodiments, the microwave heating body is inside the aerosol generating substrate. Specifically, as shown in FIG9 , the aerosol generating device includes a microwave heating body 1a and a microwave generating body (not shown), and the microwave heating body 1a includes an inner conductor unit 11a, an outer conductor unit 12a, a receiving seat 13a and a microwave feeding unit 14a.

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-closed cavity 121a is defined between the open end 123a and the closed end 122a. The receiving seat 13a extends into the cavity 121a.

The inner conductor unit 11a includes a conductor structure 111a and a radiation structure 112a coupled to the conductor structure 111a. In some embodiments, the radiation 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 is in 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 radiation structure 112a is coupled to the top of the conductor structure 111a, and the other end of the radiation structure 112a is located in the cavity 121a, but is not in direct contact with 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 microwave generated by the microwave generating assembly into the cavity 121a. The receiving seat 13a is fixedly or detachably installed at the open end 123a of the outer conductor unit 12a, and defines a receiving cavity 131a for receiving the aerosol generating product 2a. One end of the radiation structure 112a away from the conductor structure 111a extends and is inserted into the receiving cavity 131a.

The aerosol generating product 2a can be partially/wholly inserted into the accommodating 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 component 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.

In some embodiments, the laser heater is an infrared heater, which radiates infrared light at the outer periphery or inside of the aerosol generating substrate, and 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 component 4 for supplying power to the infrared heater 3. The infrared heater 3 can be partially inserted into the interior of the aerosol generating product 2, or at least one infrared heater 3 is located at the outer periphery of the aerosol generating product 2. It can be 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 medium section of the aerosol generating product 2, causing it to atomize and generate an aerosol.

The infrared heating body 3 includes a tube 31, a heating body 32 and a base 33. The tube 31 accommodates at least part of the heating body 32, and allows the infrared light radiated by the heating body 32 to pass through, thereby heating the aerosol generating product 2. The base 33 is arranged at the opening 311 of the tube 31, and is used to fix the tube 31. Among them, the heating body 32 includes a heating substrate and an infrared radiation layer arranged on the outer surface of the heating substrate. The heating substrate can excite the infrared radiation layer to generate infrared light and radiate it when it is powered on and heated.

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

When the 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 numbers of 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.

It can be understood that the above embodiments only express some implementation methods of the present application, and the description thereof is relatively specific and detailed, but it 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 deformations and improvements can be made, which all belong to the protection scope 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 the claims of the present application.

Claims (10)

A heating control method for an aerosol generating device, characterized in that the aerosol generating device comprises a heating body, the heating body 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. The heating control method of an aerosol generating device according to claim 1 is characterized in 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, and N is a puff number threshold. The heating control method of the aerosol generating device according to claim 1 is characterized in that 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. The heating control method for an aerosol generating device according to claim 1 is characterized in that the preheating temperature ranges from 100°C to 188°C. The heating control method of the aerosol generating device according to claim 1, characterized in that the inhalation 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. An aerosol generating device, characterized in that it comprises: 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. The aerosol generating device according to claim 6, characterized in that the control component is configured so 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, and N is a puff number threshold. The aerosol generating device according to claim 6 is characterized in that the control component is configured so that the temperature range of the preheating temperature is 100°C~188°C. The aerosol generating device according to claim 6 is characterized in that the microwave heating body is located on the outer periphery or inside of the aerosol generating substrate. The aerosol generating device according to claim 6 is 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 matrix.