Aerosol generating device and heating control method thereof

Abstract

The invention discloses an aerosol generating device and a heating control method thereof.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 steps that when a heating starting signal for an aerosol generating substrate contained in the aerosol generating device is detected, the heating starting signal is sent to the aerosol generating substrate; and 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 kept before the suction action occurs. When it is detected that the suction action occurs, 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 kept before the next suction action occurs. Wherein the target temperature corresponds to the current suction opening number, and the target temperature of the first opening is larger than the preheating temperature and smaller than the target temperature of other opening numbers. The problem that the mouth is scalded when the first mouth of aerosol is smoked can be avoided, and the smoking experience is improved.

Description

Technical Field

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

[0002] In order to quickly generate aerosol, the existing aerosol generation devices need to heat the aerosol generation matrix to a relatively high temperature, such as above 250°C, during the preheating stage (0 - T1). Then, in order to prevent the taste from being burnt, the temperature is lowered, as Figure 1 shown. There are also some aerosol generation devices that, in order to prevent the aerosol amount in the latter stage from decreasing, raise the heating temperature again after the cooling stage. However, it has been found in actual applications that when the user takes the first puff, the aerosol is often too hot, giving the user a burning feeling in the mouth. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an aerosol generation device and a heating control method thereof, aiming at at least one defect existing in the related technologies mentioned in the above background art: when the aerosol generation device heats the aerosol generation matrix to a relatively high temperature during the preheating stage, when the user takes the first puff, the aerosol is often too hot, giving the user a burning feeling in the mouth.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a heating control method for an aerosol generation device, the aerosol generation 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:

[0005] Preheating step: When a heating start signal for the aerosol generation matrix accommodated in the aerosol generation device is detected, control the heating body to heat the aerosol generation matrix so that the temperature of the aerosol generation matrix rises from the current temperature to the preheating temperature and remains until a suction action occurs;

[0006] Suction heating step: When a suction action is detected, control the heating body to heat the aerosol generation matrix so that the temperature of the aerosol generation matrix reaches the corresponding target temperature and remains until the next suction action occurs;

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

[0008] 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, and N is the threshold of the number of suction puffs.

[0009] 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.

[0010] Preferably, the temperature range of the preheating temperature is 100°C to 188°C.

[0011] Preferably, the suction heating step includes:

[0012] A temperature rising sub-step: when detecting a suction action, controlling the heating element to heat the aerosol-forming substrate at a first preset power within a first preset time period;

[0013] A temperature control sub-step: after the end of the first preset time period, if it is determined that the temperature of the aerosol-forming substrate is less than the target temperature, controlling the heating element to heat the aerosol-forming substrate at a second preset power within a second preset time period; if it is determined that the temperature of the aerosol-forming substrate is greater than or equal to the target temperature, controlling the heating element to stop heating the aerosol-forming substrate within a third preset time period; wherein, the second preset power is less than the first preset power.

[0014] The present invention also constructs an aerosol generating device, including:

[0015] A heating element, the heating element being a microwave heating element or a laser heating element;

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

[0017] When detecting a heating start signal for the aerosol-forming substrate accommodated in the aerosol generating device, controlling the heating element to heat the aerosol-forming substrate so that the temperature of the aerosol-forming substrate rises from the current temperature to the preheating temperature and remains until a suction action occurs;

[0018] When detecting a suction action, controlling the heating element to heat the aerosol-forming substrate so that the temperature of the aerosol-forming substrate reaches the corresponding target temperature and remains until the next suction action occurs;

[0019] Wherein, 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 temperatures of other puff numbers.

[0020] Preferably, the control component is configured to: 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 being the suction puff number threshold.

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

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

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

[0024] By implementing the present invention, the following beneficial effects are achieved:

[0025] When the present invention detects a heating start signal for the aerosol-forming substrate accommodated in the aerosol generating device, it controls the microwave heating element or the laser heating element to heat the aerosol-forming substrate, so that the temperature of the aerosol-forming substrate rises from the current temperature to the preheating temperature and is maintained until before the suction action occurs. Subsequently, when it detects that a suction action has occurred, it controls the microwave heating element or the laser heating element to heat the aerosol-forming substrate, so that the temperature of the aerosol-forming substrate reaches the corresponding target temperature and is maintained until before the next suction action occurs. Among them, the target temperature corresponds to the current number of suction puffs. Since the target temperature of the first puff is greater than the preheating temperature and less than the target temperatures of other puff numbers, the content and temperature of water vapor in the aerosol of the first puff can be effectively reduced, avoiding the problem of scalding caused by the overheated aerosol when the user takes the first puff, and improving the suction experience. Description of the Drawings

[0026] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0027] Figure 1 is a schematic curve diagram of the suction duration and the temperature of the aerosol-forming substrate in the related art;

[0028] Figure 2 is a flowchart of an embodiment in the heating control method of the aerosol generating device of the present invention;

[0029] Figure 3 is a schematic diagram of the temperature control curve in an embodiment of the present invention;

[0030] Figure 4 is a schematic diagram of the temperature control curve and the temperature detection curve in an embodiment of the present invention;

[0031] Figure 5 is a logical structure diagram of an embodiment in the aerosol generating device of the present invention;

[0032] Figure 6 is a schematic structural diagram of the microwave heating element in an embodiment of the present invention;

[0033] Figure 7 isFigure 6 Exploded view of the microwave heating body shown;

[0034] Figure 8 is Figure 6 Cross-sectional view of the radiation element of the microwave heating body located inside the receiving cavity shown;

[0035] Figure 9 Cross-sectional view of the cooperation between the microwave heating body and the aerosol-generating article in an embodiment of the present invention;

[0036] Figure 10 Schematic structural diagram of the cooperation between the aerosol-generating device and the aerosol-generating article in an embodiment of the present invention;

[0037] Figure 11 is Figure 10 Cross-sectional view of the heating element in the aerosol-generating device shown. Detailed implementation manners

[0038] In order to have a clearer understanding of the technical features, objectives, and effects of the present invention, the detailed implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0039] It should be noted that the flowcharts shown in the accompanying drawings are only illustrative and do not necessarily include all the contents and operations / steps, nor do they necessarily need to be executed in the described order. For example, some operations / steps can be decomposed, while some operations / steps can be combined or partially combined. Therefore, the actual execution order may change according to the actual situation.

[0040] The block diagrams shown in the accompanying drawings are only functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software form or implemented 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 for the relevant aerosol-generating device to be able to quickly generate sufficient aerosol, it is necessary to heat the aerosol-generating matrix to above 250°C in the preheating stage. The water in the aerosol-generating matrix will quickly evaporate, and the excessively hot water vapor mixed in the aerosol will cause the first puff of aerosol to be scalding, and at the same time, 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 during other puff numbers throughout the process from the start of pre - heating to the end of the first puff, it is beneficial to improve the problem of the first puff of aerosol being too hot. Therefore, an embodiment of the present invention discloses a heating control method for an aerosol - generating device. The aerosol - generating device includes a heating body for heating the aerosol - generating substrate, and the heating body is a microwave heating body or a laser heating body, with good atomization stability and atomization taste.

[0043] In some embodiments, the aerosol - generating substrate is removably accommodated in the aerosol - generating device. The aerosol - generating substrate can be a column - shaped aerosol - generating article. Specifically, the aerosol - generating substrate can be a solid material made from the leaves and / or stems of plants, and fragrance 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 article, which is not limited herein.

[0044] As Figure 2 shown, the heating control method of the aerosol - generating device includes a pre - heating step and a puff - heating step, specifically as follows:

[0045] Pre - heating step: When a heating start signal for the aerosol - generating substrate accommodated in the aerosol - generating device is detected, control 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 pre - heating temperature and remains until before the puffing action occurs. Among them, the current temperature can be the room temperature according to the current usage state of the aerosol - generating device, or the outdoor ambient temperature. Under some conditions, if the aerosol - generating device is in a continuous use state, the current temperature may also be slightly higher than the room temperature or the ambient temperature.

[0046] Specifically, the aerosol - generating device further 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 the user pressing a button or clicking on a touch screen will be detected, and then pre - heating starts. Control the heating body to heat the aerosol - generating substrate, and obtain in real - time the temperature of the heating body detected by the temperature - measuring element as the temperature of the aerosol - generating substrate, and determine whether the temperature reaches the pre - heating temperature. If so, the pre - heating is completed, and control the heating body to maintain at the pre - heating temperature until before the puffing action occurs; if not, continue to control the heating body to heat the aerosol - generating substrate.

[0047] In some embodiments, as Figure 3As shown, 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 any other time period, the preheating temperature is 120°C or any other temperature within the temperature range of 100°C to 188°C, which is not limited here.

[0048] Compared with heating by resistive or electromagnetic appliances, its preheating time is longer, for example, about 20S, the preheating temperature is higher, for example, 300°C to 450°C, and the heating-up speed and cooling-down speed are also relatively slow. Therefore, when the aerosol generating device heats the aerosol generating substrate twice continuously, that is, when the user inserts the second aerosol generating substrate after sucking the first one, the continuous high temperature of the heating element in the aerosol generating device will cause the first puff of aerosol sucked by the user to feel scalding when heating the second aerosol generating substrate.

[0049] However, the heating element in this embodiment is a microwave heating element or a laser heating element, which has a very fast heating-up speed and can quickly raise the temperature to the preheating temperature within 0 to 4s. At the same time, it also has a very fast cooling-down speed. Even if the user inserts the second aerosol generating substrate after sucking the first one, the heating element in the aerosol generating device will quickly cool down, and when heating the second aerosol generating substrate, it will enter the preheating stage with a lower temperature, and will not make the first puff of aerosol sucked by the user feel scalding.

[0050] Suction heating step: When a suction action is detected, control the heating element to heat the aerosol generating substrate so that the temperature of the aerosol generating substrate reaches the corresponding target temperature and remains until the next suction action occurs. Among them, the target temperature corresponds to the current number of suction puffs. The target temperature of the first puff is greater than the preheating temperature and less than or equal to the target temperature of other puff numbers. 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, and N is the suction puff number threshold.

[0051] Specifically, during the user's suction process, the airflow sensor in the aerosol generating device will detect the change in airflow pressure, thereby detecting the occurrence and end of the suction action. When a suction action is detected, control the heating element to heat the aerosol generating substrate, and continuously obtain the temperature of the heating element detected by the temperature measuring element as the temperature of the aerosol generating substrate, and judge whether the temperature reaches the target temperature. If so, the heating is completed, and control the heating element to maintain at the target temperature until the next suction action occurs; if not, continue to control the heating element to heat the aerosol generating substrate.

[0052] In a specific embodiment, as shown in Table 1, Figure 3 and Figure 4 Table 1 below shows the correspondence between the current number of puff draws and the target temperature of the aerosol - generating substrate. Figure 4 In the figure, curve L1 is the curve of the number of puff draws, L2 is the temperature curve of the heating element (probe), and L3 is the target - temperature curve. The target temperature of the first puff is greater than the pre - heating temperature and less than the target temperatures of other puff numbers. Additionally, the target temperature of the i - th puff is greater than or equal to the target temperature of the (i - 1) - th puff, where i = 3, 4, …, N, and N is the threshold of the number of puff draws. Specifically, from the start of pre - heating until the end of the first puff draw, the temperature of the aerosol - generating substrate is lower than that of the aerosol - generating substrate during other puff numbers throughout the process. Then, starting from the second puff, the temperature is maintained or increased gradually. In the later stage, due to the reduction of moisture in the aerosol - generating substrate, even if the aerosol - generating substrate is heated to a relatively high temperature, there is less water vapor, and there will be no feeling of scalding in the later stage. Preferably, the difference between the target temperature of the first puff and the pre - heating 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 puff and the pre - heating temperature ranges from 100°C to 180°C, preferably 130°C, and the difference between the target temperature of the second puff and the target temperature of the first puff ranges from 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 puff and the pre - heating temperature is 150°C or any other temperature within the range of 100°C to 180°C, and the difference between the target temperature of the second puff and the target temperature of the first puff is 3°C or any other temperature within the range of 0°C to 20°C, which is not limited herein.

[0053] Table 1

[0054]

[0055]

[0056] As Figure 3 shown, Time1 to TimeN are the times when a puffing action is detected. In some embodiments, N is 14. It can be understood that in some other embodiments, N is 20 or any other number, which is not limited herein. 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 a puffing action is detected, since the heating element is a microwave heating element or a laser heating element, which has a very fast heating rate, it can quickly raise the temperature to the target temperature within about 0.5 s. For example, it can quickly rise from Temp0 to Temp1. In the later stage, the target temperature is maintained or increased gradually for each puff, which helps to release the active ingredients of the aerosol - generating substrate and improve the taste consistency. If the temperature remains the same for each subsequent puff, the taste of the aerosol in the later stage will become lighter.

[0057] In some embodiments, such as Figure 3 shown, the suction heating step includes:

[0058] Temperature rising sub-step: When a suction action is detected, control the heating element to heat the aerosol generating matrix at a first preset power within a first preset time period;

[0059] Temperature control sub-step: After the first preset time period ends, if it is determined that the temperature of the aerosol generating matrix is less than the target temperature, control the heating element to heat the aerosol generating matrix at a second preset power within a second preset time period; if it is determined that the temperature of the aerosol generating matrix is greater than or equal to the target temperature, control the heating element to stop heating the aerosol generating matrix within a 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, although they can also be different. Additionally, it should be noted that since the remaining time after subtracting the time of constant power heating (the first preset time period, for example 350 ms) from the duration of a single suction action (for example 1 - 2 s) is much longer than the temperature detection period (for example 20 - 30 ms), therefore, in the temperature control sub-step, temperature judgment and power adjustment can be performed cyclically multiple times. For example, if the duration of a single suction action of a certain user is 1 s, 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 times of temperature judgment and power adjustment are performed in the temperature control sub-step.

[0060] In this embodiment, when the control component controls the heating element, since it first performs heating at a constant power (the first preset power) for a period of time (the first preset time period), and then periodically performs temperature judgment and power adjustment, therefore, compared with the traditional PID control scheme, in the PID control scheme, the differentiator is sensitive to the high-frequency signals generated by the microwave heating element or the laser heating element and is prone to amplifying noise signals. Therefore, the control scheme of this embodiment can reduce the noise of the aerosol generating device.

[0061] In a specific embodiment, the first preset time period is, for example, 350 ms, the second preset time period and the third preset time period are, for example, 30 ms respectively, the first preset power can be the maximum output power, for example, 20 W, and the second preset power is, for example, 10 W. In this way, when it is detected that a suction action occurs, first control the heating element to heat at a constant power of 20 W for 350 ms to increase the temperature of the aerosol-forming substrate. Then start to detect the temperature every 30 ms. If it is determined that the temperature of the aerosol-forming substrate is less than the target temperature, control the heating element to heat at a constant power of 10 W for 30 ms; if it is determined that the temperature of the aerosol-forming substrate is greater than or equal to the target temperature, stop heating for 30 ms. Repeat this cycle for temperature detection and power adjustment until the suction action is detected to end. It should be noted here that although heating stops when it is determined that the temperature of the aerosol-forming substrate is greater than or equal to the target temperature, this process is a cycle process at the ms level. Once it is determined that the temperature of the aerosol-forming substrate is less than the target temperature, heating is carried out again. Therefore, it can be approximately regarded that the temperature of the aerosol-forming substrate reaches the corresponding target temperature and remains constant.

[0062] In a specific embodiment, the first preset time period is, for example, 450 ms, the second preset time period is, for example, 30 ms, the third preset time period is, for example, 20 ms, the first preset power can be the maximum output power, for example, 20 W, and the second preset power is, for example, 10 W. In this way, when it is detected that a suction action occurs, first control the heating element to heat at a constant power of 20 W for 450 ms to increase the temperature of the aerosol-forming substrate. Then start to detect the temperature. If it is determined that the temperature of the aerosol-forming substrate is less than the target temperature, control the heating element to heat at a constant power of 10 W for 30 ms; if it is determined that the temperature of the aerosol-forming substrate is greater than or equal to the target temperature, stop heating for 20 ms. Repeat this cycle for temperature detection and power adjustment until the suction action is detected to end.

[0063] In some embodiments, a calculation step is further included before the suction heating step, which is specifically as follows:

[0064] Calculation step: When it is detected that a suction action occurs, count the current number of suction puffs, such as the first puff, the second puff, or the third puff, etc., and obtain the target temperature corresponding to the current number of suction puffs.

[0065] In some embodiments, the heating control method of the aerosol generating device further includes a heating stop step, which is specifically as follows:

[0066] Heating stop step: Determine whether the current number of puffs has reached the puff number threshold. The puff number threshold is, for example, 10 to 16 times. If so, control the heating element to stop heating the aerosol-forming substrate; if not, continue to control the heating element to heat the aerosol-forming substrate so that the aerosol-forming substrate maintains the target temperature corresponding to the current number of puffs until before the next puffing action occurs.

[0067] In some embodiments, the heating control method of the aerosol generating device further includes a timing step and a heating stop step, specifically as follows:

[0068] Timing step: Start timing when a heating start signal is detected, and count the cumulative heating duration when a puffing action end is detected.

[0069] Heating stop step: Determine whether the cumulative heating duration has reached the heating duration threshold. For example, the heating duration threshold is 4 min to 60 min. If so, control the heating element to stop heating the aerosol-forming substrate; if not, continue to control the heating element to heat the aerosol-forming substrate so that the aerosol-forming substrate maintains the target temperature corresponding to the current number of puffs until before the next puffing action occurs.

[0070] In some embodiments, when a puffing action end is detected, if it is determined that the time interval after the puffing action end is greater than a preset threshold or when a heating stop signal is detected, then control the heating element to stop heating the aerosol-forming substrate. When the user wants to puff again later, the preheating step and the puffing heating step are executed again.

[0071] As Figure 5 shown, an embodiment of the present invention discloses an aerosol generating device, including 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-forming substrate. The control component is configured to:

[0072] When a heating start signal for the aerosol-forming substrate accommodated in the aerosol generating device is detected, control the heating element to heat the aerosol-forming substrate so that the temperature of the aerosol-forming substrate rises from the current temperature to the preheating temperature and remains until before a puffing action occurs;

[0073] When a puffing action is detected, control the heating element to heat the aerosol-forming substrate so that the temperature of the aerosol-forming substrate reaches the corresponding target temperature and remains until before the next puffing action occurs;

[0074] wherein, 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 temperatures of other puff numbers.

[0075] Specifically, the aerosol generating device further includes a temperature measuring element, a heating start detection component, and a puff detection component. The temperature measuring element is used to detect the temperature of the heating element. The heating start detection component is used to detect the heating start signal and the heating stop signal for the aerosol generating substrate accommodated in the aerosol generating device. The puff detection component is used to detect the occurrence and end of a puffing action, such as 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 on a touch screen, and thus start preheating. The control component is configured to: control the heating element to heat the aerosol generating substrate, and obtain in real time the temperature of the heating element detected by the temperature measuring element as the temperature of the aerosol generating substrate, determine whether the temperature reaches the preheating temperature, if so, the preheating is completed, and control the heating element to maintain at the preheating temperature until a puffing action occurs; if not, continue to control the heating element to heat the aerosol generating substrate.

[0076] 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, and thus detect the occurrence and end of the puffing action. When the puff detection component detects the occurrence of a puffing action, the control component is configured to: control the heating element to heat the aerosol generating substrate, and obtain in real time the temperature of the heating element detected by the temperature measuring element as the temperature of the aerosol generating substrate, determine whether the temperature reaches the target temperature, if so, the heating is completed, and control the heating element to maintain at the target temperature until the occurrence of the next puffing action; if not, continue to control the heating element to heat the aerosol generating substrate.

[0077] In some embodiments, the control component is configured to: the target temperature of the i-th puff is greater than or equal to the target temperature of the (i - 1)-th puff, where i = 2, 3, 4, …, N, and N is the threshold number of puffing ports. Preferably, the target temperature of the first puff is less than the target temperatures of other port numbers, and the target temperature of the i-th puff is greater than or equal to the target temperature of the (i - 1)-th puff, where i = 3, 4, …, N. Specifically, from the start of preheating to before the end of the first puff, the temperature of the aerosol generating substrate is lower than the temperatures of the aerosol generating substrates of other port numbers throughout the process, and then starting from the second puff, the temperature is maintained or increased port by port. In the later stage, due to the reduction of moisture in the aerosol generating substrate, even if the aerosol generating substrate is heated to a relatively high temperature, there is less water vapor, and there will be no feeling of scalding in the later stage.

[0078] In some embodiments, the control component is configured to: 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.

[0079] In some embodiments, the control component is configured to: the temperature range of the preheating temperature is 100°C to 188°C, preferably 115°C to 125°C.

[0080] In some embodiments, when a suction action is detected, the heating element is controlled to heat the aerosol-forming substrate so that the temperature of the aerosol-forming substrate reaches a corresponding target temperature and is maintained until the next suction action occurs, including:

[0081] When a suction action is detected, control the heating element to heat the aerosol-forming substrate at a first preset power within a first preset time period;

[0082] After the end of the first preset time period, if it is determined that the temperature of the aerosol-forming substrate is lower than the target temperature, control the heating element to heat the aerosol-forming substrate at a second preset power within a second preset time period; if it is determined that the temperature of the aerosol-forming substrate is greater than or equal to the target temperature, control the heating element to stop heating the aerosol-forming substrate within a 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, although they can also be different. Additionally, it should be noted that since the remaining time after subtracting the time of constant-power heating (the first preset time period, for example 350 ms) from the duration of a single suction action (for example 1 - 2 s) is much greater than the temperature detection period (for example 20 - 30 ms), therefore, temperature judgment and power adjustment can be cycled multiple times at this stage. For example, if the duration of a single suction action of a certain user is 1 s, 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 times of temperature judgment and power adjustment are performed at this stage.

[0083] In this embodiment, when the control component controls the heating element, since it first performs constant-power (first preset power) heating for a period of time (the first preset time period), and then periodically performs temperature judgment and power adjustment, therefore, compared with the traditional PID control scheme, in the PID control scheme, the differentiator is sensitive to high-frequency signals generated by the microwave heating element or the laser heating element and is prone to amplifying noise signals. Therefore, the control scheme of this embodiment can reduce the noise of the aerosol generating device.

[0084] In a specific embodiment, the first preset time period is, for example, 350 ms, the second preset time period and the third preset time period are, for example, 30 ms respectively, the first preset power may be the maximum output power, for example, 20 W, and the second preset power is, for example, 10 W. In this way, when it is detected that a suction action occurs, first control the heating element to heat at a constant power of 20 W for 350 ms to increase the temperature of the aerosol-forming substrate. Then start to detect the temperature every 30 ms. If it is determined that the temperature of the aerosol-forming substrate is less than the target temperature, control the heating element to heat at a constant power of 10 W for 30 ms; if it is determined that the temperature of the aerosol-forming substrate is greater than or equal to the target temperature, stop heating for 30 ms. Repeat this cycle for temperature detection and power adjustment until the suction action is detected to end. It should be noted here that although heating stops when it is determined that the temperature of the aerosol-forming substrate is greater than or equal to the target temperature, this process is a cycle process at the ms level. Once it is determined that the temperature of the aerosol-forming substrate is less than the target temperature, heating is carried out again. Therefore, it can be approximately regarded that the temperature of the aerosol-forming substrate reaches the corresponding target temperature and remains constant.

[0085] In a specific embodiment, the first preset time period is, for example, 450 ms, the second preset time period is, for example, 30 ms, the third preset time period is, for example, 20 ms, the first preset power may be the maximum output power, for example, 20 W, and the second preset power is, for example, 10 W. In this way, when it is detected that a suction action occurs, first control the heating element to heat at a constant power of 20 W for 450 ms to increase the temperature of the aerosol-forming substrate. Then start to detect the temperature. If it is determined that the temperature of the aerosol-forming substrate is less than the target temperature, control the heating element to heat at a constant power of 10 W for 30 ms; if it is determined that the temperature of the aerosol-forming substrate is greater than or equal to the target temperature, stop heating for 20 ms. Repeat this cycle for temperature detection and power adjustment until the suction action is detected to end.

[0086] In some embodiments, the control component is configured to: when it is detected that a suction action occurs, count the current number of suction puffs, for example, the first puff, the second puff or the third puff, etc., and obtain the target temperature corresponding to the current number of suction puffs.

[0087] In some embodiments, the control component is configured to: determine whether the current number of suction puffs reaches the suction puff threshold, and the suction puff threshold is, for example, 10 to 16 times. If so, control the heating element to stop heating the aerosol-forming substrate; if not, continue to control the heating element to heat the aerosol-forming substrate to keep the aerosol-forming substrate at the target temperature corresponding to the current number of suction puffs until the next suction action occurs.

[0088] In some embodiments, the control component is configured to: start timing when a heating start signal is detected, count the cumulative heating duration when a suction action ends, and determine whether the cumulative heating duration reaches a heating duration threshold, for example, the heating duration threshold is 4 min to 60 min. If so, control the heating element to stop heating the aerosol-forming substrate; if not, continue to control the heating element to heat the aerosol-forming substrate to keep the aerosol-forming substrate at the target temperature corresponding to the current number of puffs until before the next suction action occurs.

[0089] In some embodiments, the microwave heating element is on the outer peripheral circle of the aerosol-forming substrate. Specifically, as Figure 6 shown, the aerosol generating device includes a microwave heating element 1 and a microwave generating body (not shown). The microwave heating element 1 includes an inner conductor unit 11, an outer conductor unit 12, a receiving seat 13, and a microwave feeding unit (not shown). As Figure 7 and Figure 8 shown, the outer conductor unit 12 has a cavity 121. The inner conductor unit 11 is disposed in the cavity 121 of the outer conductor unit 12 and can have a good ohmic contact with the outer conductor unit 12. The receiving seat 13 is used to receive the aerosol generating article. The microwave feeding unit is used to feed the microwave generated by the microwave generating body into the outer conductor unit 12 and the inner conductor unit 11. The microwave heating element 1 can form a microwave field after the microwave is fed in, surrounding the outer peripheral circle of the aerosol generating article, and this microwave field can act on the aerosol generating article to achieve microwave heating.

[0090] As Figure 7 and Figure 8 shown, 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-closed cavity 121 can be defined between the open end 123 and the closed end 122, and the receiving seat 13 extends into the cavity 121.

[0091] 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 has an ohmic contact with the closed end 122 of the outer conductor unit 12. The other end extends towards 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 article. The receiving cavity 131 is disposed in the cavity 121 of the outer conductor unit 12.

[0092] The inner conductor unit 11 includes a conductor structure 111 and a radiation structure 112. The conductor structure 111 is disposed within the cavity 121, and the outer diameter of the conductor structure 111 is smaller than the inner diameter of the outer conductor unit 12. It includes a fixed end and a free end that are 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 functions to conduct microwaves. In some embodiments, it may be cylindrical. One end of the conductor structure 111 away from the open end 123 of the outer conductor unit 12 is the fixed end, which can be fixedly connected to the bottom 124 of the outer conductor unit 12. One end of the conductor structure 111 close to the open end 123 extends towards the open end 123 of the outer conductor unit 12.

[0093] The radiation structure 112 can be coupled to the free end of the conductor structure 111. The radiation structure 112 is located outside the aerosol-generating article and can be disposed along the peripheral edge of the end face 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. The at least one radiation element 1121 is disposed in the circumferential direction of the base 1122. The at least one radiation element is distributed inside the receiving cavity 131 and is in contact 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 article is received in the receiving cavity 131, the at least one radiation element 1121 is located on the outer peripheral circle of the aerosol-generating article, and a microwave field is formed on the outer peripheral circle of the aerosol-generating article. It can be understood that in some other embodiments, there may be at least two, three or any number of radiation elements 1121, and the radiation element 1121 is a probe, which is not limited herein.

[0094] In some embodiments, the microwave heating body is inside the aerosol-generating matrix. Specifically, as Figure 9 shown, the aerosol-generating device includes a microwave heating body 1a and a microwave generating body (not shown). 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.

[0095] The outer conductor unit 12a is in a cylindrical shape and has a closed end 122a and an open end 123a opposite to the closed end 122a. A semi-closed cavity 121a can be defined between the open end 123a and the closed end 122a. The receiving seat 13a extends into the cavity 121a.

[0096] 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 to form the short - circuit end of the microwave heater 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 heater 1a. The microwave feeding unit 14a is detachably mounted on the outer conductor unit 12a for feeding the microwave 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, which defines a receiving cavity 131a for receiving the aerosol - generating article 2a. The end of the radiation structure 112a away from the conductor structure 111a extends and inserts into the receiving cavity 131a.

[0097] The aerosol - generating article 2a can be partially / fully inserted into the receiving cavity 131a. At this time, a part of the radiation structure 112a is inserted inside the aerosol - generating article 2a. When the microwave generating assembly feeds microwaves to the microwave heater 1a through the microwave feeding unit 14a, a microwave energy field can be formed around the radiation structure 112a to heat the inside of the aerosol - generating article 2a.

[0098] In some embodiments, the laser heater is an infrared heater, which radiates infrared light on the outer circumference or inside of the aerosol - generating matrix, and the infrared light is used to heat the aerosol - generating matrix. Specifically, as Figure 10 and Figure 11 shown, the aerosol - generating device includes an infrared heater 3 and a power - supply assembly 4 for supplying power to the infrared heater 3. The infrared heater 3 can be partially inserted into the inside of the aerosol - generating article 2, or at least one infrared heater 3 is located on the outer circumference of the aerosol - generating article 2. It can be understood that in some other embodiments, there can be at least two, three or any number of infrared heaters 3, which is not limited here. The infrared heater 3 generates infrared light in the energized state to heat the medium section of the aerosol - generating article 2, causing it to atomize and generate aerosol.

[0099] The infrared heater 3 includes a tube body 31, a heating body 32 and a base 33. The tube body 31 houses 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 article 2. The base 33 is disposed at the opening 311 of the tube body 31 for fixing the tube body 31. Among them, the heating body 32 includes a heating matrix and an infrared radiation layer disposed on the outer surface of the heating matrix. The heating matrix can excite the infrared radiation layer to generate and radiate infrared light in the energized heating state.

[0100] By implementing the present invention, the following beneficial effects are achieved:

[0101] When the present invention detects a heating start signal for the aerosol-forming substrate accommodated in the aerosol-generating device, it controls the microwave heating body or the laser heating body to heat the aerosol-forming substrate, so that the temperature of the aerosol-forming substrate rises from the current temperature to the preheating temperature and remains until before the suction action occurs. Subsequently, when it detects that a suction action occurs, it controls the microwave heating body or the laser heating body to heat the aerosol-forming substrate, so that the temperature of the aerosol-forming substrate reaches the corresponding target temperature and remains until before the next suction action occurs. Among them, the target temperature corresponds to the current number of suction puffs. Since the target temperature of the first puff is greater than the preheating temperature and less than the target temperatures of other puff numbers, the content and temperature of water vapor in the aerosol of the first puff can be effectively reduced, avoiding the problem of scalding caused by the overheated aerosol when the user takes the first puff and enhancing the suction experience.

[0102] It can be understood that the above embodiments only represent some implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention patent; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above embodiments or technical features can be freely combined, and several deformations and improvements can also be made, all of which belong to the protection scope of the present invention, that is, the embodiments described in "in some embodiments" can be freely combined with any of the above or below embodiments; therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention should fall within the scope covered by the claims of the present invention.

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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