Aerosol-generating device and aerosol generation control method therefor

Abstract

The present invention relates to an aerosol-generating device and an aerosol generation control method therefor. The method comprises the following steps: acquiring an external ambient temperature from a first temperature measurement element provided on an aerosol-generating device, and acquiring an initial tobacco stick accommodating chamber temperature from a second temperature measurement element; acquiring an initial heating element temperature from a temperature measurement film that is used for measuring heating element temperature; determining whether preset conditions are satisfied with respect to the initial tobacco stick accommodating chamber temperature and the external ambient temperature and with respect to the initial tobacco stick accommodating chamber temperature and the initial heating element temperature; and, if yes, on the basis of the initial heating element temperature and the initial tobacco stick accommodating chamber temperature, calibrating a current heating element temperature measured by the temperature measurement film, so as to obtain a calibrated heating element temperature. The present invention effectively improves the accuracy of temperature measurement of the aerosol-generating device, so as to facilitate accurate temperature control in an aerosol generating process, thus reducing impact on taste and improving user experience.

Description

An aerosol generating device and a method of controlling aerosol generation thereof TECHNICAL FIELD

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

[0002] The traditional temperature control algorithm on the electronic atomizer is equivalent to taking the temperature measuring film itself as a temperature sensor to measure the temperature of the atomization area. If a more accurate temperature measurement is required, the consistency of TCR, electrical properties and individual consistency of the temperature measuring film are required to be high. The temperature measuring film in the electronic atomizer is generally made of conductive materials such as platinum, nickel, iron, ruthenium, duplex stainless steel and 316 stainless steel, and the conductive material is generally printed on the heating body.

[0003] Due to the cost and production process, the temperature measuring films made of different materials have large differences in TCR and electrical properties, even the temperature measuring films made of the same material but from different batches have large differences in TCR and electrical properties, and even the temperature measuring films made of the same material but from the same batch have large individual differences in TCR and electrical properties. These differences make it difficult for the traditional temperature control algorithm based on the temperature measuring film on the electronic atomizer to accurately control the temperature. In actual application, the misjudgment rate is relatively high, the user experience is poor, and even the taste is affected. SUMMARY

[0004] The technical problem to be solved by the present application is to provide an aerosol generating device and a method of controlling aerosol generation thereof.

[0005] The technical solution adopted by the present application to solve the technical problem is: a method for controlling aerosol generation in an aerosol generating device, comprising the following steps:

[0006] obtaining an external environment temperature from a first temperature measuring element arranged on the aerosol generating device, and obtaining an initial cigarette containing cavity temperature from a second temperature measuring element;

[0007] obtaining an initial heating body temperature from a temperature measuring film for detecting the temperature of the heating body;

[0008] determining whether the initial cigarette containing cavity temperature meets a preset condition with the external environment temperature and the initial heating body temperature, respectively;

[0009] If yes, calibrating the current heating body temperature measured by the temperature measuring film according to the initial heating body temperature and the initial cigarette containing cavity temperature to obtain a calibrated heating body temperature.

[0010] In some embodiments, prior to the step of calibrating the current heating element temperature measured by the temperature-sensing membrane based on the initial heating element temperature and the initial cigarette holder cavity temperature, the method further includes:

[0011] During the heating phase, the TCR value of the temperature sensing membrane is calculated using a TCR self-learning algorithm, and the current heating element temperature measured by the temperature sensing membrane is adjusted according to the TCR value.

[0012] In some embodiments, the step of calculating the TCR value of the temperature-sensing membrane according to the TCR self-learning algorithm during the heating stage includes:

[0013] A first power is input to the temperature sensing membrane for a first preset time to obtain the initial resistance value R0 of the temperature sensing membrane;

[0014] A second power is input to the temperature-sensing membrane for a second preset duration, and the resistance value R of the temperature-sensing membrane during this period is recorded. xi Regarding the resistance value R xi Filtering is performed to obtain the stable resistance value R. xs ;

[0015] Based on the initial resistance value R0, the resistance value R xs And the temperature rise data ΔT under the second power thermal equilibrium state in the pre-stored sample database. xs The TCR value is calculated.

[0016] Wherein, the first power is less than the second power; and the first preset duration is less than the second preset duration.

[0017] In some embodiments, the step of inputting a first power to the temperature-sensing membrane for a first preset duration to obtain the initial resistance value R0 of the temperature-sensing membrane includes:

[0018] A first power is input to the temperature sensing membrane for a first preset time, and the voltage and current values ​​during this period are obtained through analog-to-digital sampling. The initial resistance value R0 of the temperature sensing membrane is calculated based on the voltage and current values ​​and Ohm's law.

[0019] In some embodiments, a second power is continuously input to the temperature-sensing membrane for a second preset duration, and the resistance value R of the temperature-sensing membrane during this period is recorded. xi Regarding the resistance value R xi Filtering is performed to obtain the stable resistance value R. xs The steps include:

[0020] A second power is input to the temperature-sensing membrane for a second preset duration, and the resistance value R of the temperature-sensing membrane is recorded every third preset duration. xi, the recorded resistance value R xi is filtered by a preset filtering algorithm to obtain a stable resistance value R xs .

[0021] In some embodiments, the first power is 0.1 W; and / or

[0022] the second power is 2.5 W, 3 W, 3.5 W or 4 W; and / or

[0023] the first preset time length is 10 ms; and / or

[0024] the second preset time length is 60 s.

[0025] In some embodiments, in the step of adjusting the current heating body temperature measured by the temperature measuring film according to the TCR value, further comprising:

[0026] determining the resistance rise value ΔR of the temperature measuring film in the heating state;

[0027] taking the initial heating body temperature as the starting temperature T0, and adjusting the current heating body temperature measured by the temperature measuring film according to the resistance rise value ΔR, the initial resistance value R0, the starting temperature T0 and the TCR value, and the adjusted heating body temperature is the real-time temperature T i of the heating body during heating.

[0028] In some embodiments, in the step of calibrating the current heating body temperature measured by the temperature measuring film according to the initial heating body temperature and the initial cigarette containing cavity temperature to obtain the calibrated heating body temperature, comprising:

[0029] subtracting the starting temperature T0 from the real-time temperature T i to obtain a temperature rise differential temperature, and then adding the temperature rise differential temperature to the initial cigarette containing cavity temperature to obtain the real-time temperature T i of the calibrated heating body.

[0030] In some embodiments, in the step of judging whether the initial cigarette containing cavity temperature respectively satisfies the preset condition with the external environment temperature and the initial heating body temperature, comprising:

[0031] judging whether the following conditions are satisfied simultaneously:

[0032] a first condition: the deviation of the cigarette containing cavity temperature and the external environment temperature is within a first preset deviation range;

[0033] a second condition: the deviation of the heating body temperature and the cigarette containing cavity temperature is within a second preset deviation range.

[0034] In some embodiments, the first preset deviation range is between ±2℃; and / or

[0035] The second preset deviation range is between ±10℃.

[0036] In some embodiments, the method further comprises a TCR value verification step:

[0037] After the TCR value is calculated according to the TCR self-learning algorithm, the external environment temperature is taken as a starting temperature T0’ to verify the reliability of the TCR value.

[0038] In addition, the present application also provides an aerosol generating device, comprising:

[0039] A first temperature measuring element arranged on the aerosol generating device for detecting an external environment temperature;

[0040] A second temperature measuring element for detecting a temperature of a cigarette accommodating cavity;

[0041] A temperature measuring film for detecting a temperature of the heating element;

[0042] A power supply assembly for providing power supply to the heating element;

[0043] A controller, and the controller is configured to execute the steps of the method for controlling aerosol generation in the aerosol generating device as described above by invoking a computer program stored in a memory.

[0044] In some embodiments, the aerosol generating device comprises a heating structure (1) for heating an aerosol forming substrate, the heating structure (1) comprising a heating element (20) having a heating portion (21), a tube body (10) sleeved on the outer periphery of the heating portion (21) and being transparent to infrared light, and a support (30);

[0045] The tube body (10) is arranged spaced apart from at least part of the heating portion (21); the heating portion (21) has a heating element (211);

[0046] The support is at least partially mounted in the tube body to support the heating element, and is arranged sequentially along the axial direction of the tube body and the heating portion; the support has a first end and a second end in the axial direction, the first end is arranged close to the heating portion, and the second end is arranged away from the heating portion;

[0047] The temperature measuring film is arranged at the first end of the support.

[0048] In some embodiments, the temperature measuring film is wrapped around part of the outer wall of the support in the circumferential direction of the support; and / or

[0049] the first end has an end face, and the temperature measuring film extends to at least part of the end face; and / or

[0050] the temperature measuring film is in contact with part of the inner wall of the tube body.

[0051] The aerosol generating device and the method for controlling aerosol generation of the present application have the following beneficial effects: the present application calibrates the temperature of the heating element measured by the temperature measuring film to obtain a more accurate real-time heating element temperature, effectively improves the accuracy of temperature measurement of the aerosol generating device, can be beneficial to precise temperature control of the aerosol generating process, reduces the influence on taste, and improves user experience. BRIEF DESCRIPTION OF DRAWINGS

[0052] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0053] Fig. 1 is a flowchart of a method for controlling aerosol generation in an aerosol generating device according to an embodiment of the present application;

[0054] Fig. 2 is a flowchart of a method for controlling aerosol generation in an aerosol generating device according to some embodiments of the present application;

[0055] Fig. 3 is a flowchart of a method for controlling aerosol generation in an aerosol generating device according to some embodiments of the present application;

[0056] Fig. 4 is a flowchart of a method for controlling aerosol generation in an aerosol generating device according to some embodiments of the present application;

[0057] Fig. 5 is a graph of measured temperature data of a heating element reaching a thermal equilibrium state;

[0058] Fig. 6 is a schematic diagram of a heating structure of an aerosol generating device according to some embodiments of the present application;

[0059] Fig. 7 is a sectional view of the heating structure shown in Fig. 6;

[0060] Fig. 8 is a schematic diagram of a structure exploded view of the heating structure shown in Fig. 7;

[0061] Fig. 9 is a diagram of the support member and the temperature measuring element cooperating shown in Fig. 8;

[0062] Fig. 10 is a schematic diagram of the temperature measuring element structure shown in Fig. 9. DETAILED DESCRIPTION

[0063] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the drawings.

[0064] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, circuits, and

[0065] In order to facilitate the understanding of the present application, a more complete description of the present application will be provided below, and the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0066] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or one or more intervening elements can be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements can be present. When the terms "vertical", "horizontal", "left", "right", "upper", "lower", "inner", "outer", "bottom", etc. are used to indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, they are only for the convenience of description and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0067] It should be understood that although the terms first, second, third, etc. can be used in describing various information in the embodiments of the present application, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. There is no requirement or implication that there is any such actual relationship or order between these entities or operations.

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the specification of the present application herein is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0069] Referring to FIG. 1, in one embodiment disclosed in the present application, the method for controlling aerosol generation in an aerosol generating device according to the present embodiment includes the following steps:

[0070] S1, obtaining an external environment temperature from a first temperature measuring element provided on the aerosol generating device, and obtaining an initial cigarette accommodation cavity temperature from a second temperature measuring element.

[0071] Alternatively, the initial cigarette accommodating cavity temperature and the external environment temperature can be obtained by an NTC (thermistor) arranged close to the heating cavity and by an NTC arranged close to the outer surface of the aerosol generating device, respectively.

[0072] It should be noted that the external environment temperature is relative to the aerosol generating device, i.e. the external environment temperature refers to the temperature in the environment where the aerosol generating device is located. If the aerosol generating device is in an indoor environment, the external environment temperature is equal to the room temperature. If the aerosol generating device is in an outdoor environment, the external environment temperature is equal to the temperature outside the room.

[0073] S2, obtaining an initial heating element temperature from the temperature measuring film for detecting the heating element temperature.

[0074] S3, determining whether the initial cigarette accommodating cavity temperature meets the preset condition with the external environment temperature and the initial heating element temperature, respectively.

[0075] Specifically, in the step of determining whether the initial cigarette accommodating cavity temperature meets the preset condition with the external environment temperature and the initial heating element temperature, respectively, the following is included:

[0076] determining whether the following conditions are met simultaneously:

[0077] The first condition: the deviation of the cigarette accommodating cavity temperature from the external environment temperature is within a first preset deviation range. Preferably, the first preset deviation range is ±2℃. In this embodiment, when the deviation of the cigarette accommodating cavity temperature from the external environment temperature is within ±2℃ (including the endpoints), it is considered that the cigarette accommodating cavity temperature is consistent with the external environment temperature.

[0078] The second condition: the deviation of the heating element temperature from the cigarette accommodating cavity temperature is within a second preset deviation range. Preferably, the second preset deviation range is ±10℃. In this embodiment, when the deviation of the heating element temperature from the cigarette accommodating cavity temperature is within ±10℃ (including the endpoints), it is considered that the initial heating element temperature measured by the temperature measuring film is reasonable, and the initial heating element temperature can be used as the starting temperature T0.

[0079] If both conditions are met, step S4 is performed.

[0080] S4, if so, calibrating the current heating element temperature measured by the temperature measuring film according to the initial heating element temperature and the initial cigarette accommodating cavity temperature to obtain a calibrated heating element temperature.

[0081] This embodiment calibrates the heating element temperature measured by the temperature measuring film to obtain a more accurate real-time heating element temperature, effectively improving the accuracy of temperature measurement of the aerosol generating device, which is conducive to precise temperature control of the aerosol generating process, reduces the influence on the taste, and improves the user experience.

[0082] In some embodiments, referring to FIG. 2, before the step of calibrating the current heater temperature measured by the temperature measuring film according to the initial heater temperature and the initial cigarette accommodating cavity temperature, the method further comprises:

[0083] S5, calculating the TCR value of the temperature measuring film by the TCR self-learning algorithm in the heating stage, and adjusting the current heater temperature measured by the temperature measuring film according to the TCR value.

[0084] In this embodiment, the TCR self-learning algorithm is added to the traditional TCR temperature control algorithm, and the differential temperature control is realized according to the estimated TCR value, thereby effectively improving the accuracy of temperature measurement.

[0085] Specifically, referring to FIG. 3, in the step of calculating the TCR value of the temperature measuring film according to the TCR self-learning algorithm in the heating stage, the step comprises:

[0086] S501, inputting a first power to the temperature measuring film for a first preset time length to obtain an initial resistance value R0 of the temperature measuring film.

[0087] It can be understood that in this step, the first power is input to the temperature measuring film for a first preset time length, and the voltage value and the current value during the period are obtained by analog-digital sampling, and the initial resistance value R0 of the temperature measuring film is calculated according to the voltage value and the current value combined with Ohm's law.

[0088] Alternatively, before step S501, the method can further comprise: when it is determined that the cigarette accommodating cavity temperature is consistent with the external environment temperature, starting the TCR self-learning mode by a preset command input by a user or other ways (such as triggering a start button, etc.). After starting the TCR self-learning mode, steps S501 to S503 are executed. That is, the determination of the TCR value and other characteristics of the temperature measuring film can be performed manually by the user. Of course, the determination of the TCR value and other characteristics of the temperature measuring film can also be completed by TCR self-learning before factory testing.

[0089] S502, inputting a second power to the temperature measuring film for a second preset time length, and recording the resistance value R xi of the temperature measuring film during the period. xi xs .

[0090] It can be understood that in this step, the second power is input to the temperature measuring film for a second preset time length, and the resistance value R xi of the temperature measuring film is recorded once every third preset time length, and the recorded resistance value R xi is filtered by a preset filtering algorithm, thereby obtaining the stable resistance value R xs . Preferably, the third preset time length is 100 ms.​

[0091] That is, the obtained resistance value of the temperature measuring film can be preprocessed by using a sliding average filter, a Kalman filter or other algorithms to obtain relatively stable data of the resistance value of the temperature measuring film, and thus the stable resistance value R of the temperature measuring film at the stable time is calculated xs .

[0092] S503, according to the initial resistance value R0, the resistance value R xs , and the pre-stored temperature rise data AT in the sample database at the second power thermal equilibrium state, the TCR value is calculated and saved. xs

[0093] Then, the current temperature of the heat generating body measured by the temperature measuring film is adjusted according to the TCR value.

[0094] Wherein, the first power is less than the second power. The first preset time is less than the second preset time. As an option, the first power is 0.1W. The second power is 2.5W, 3W, 3.5W or 4W or other power. The first preset time is 10ms. The second preset time is 60s.

[0095] Optionally, in some embodiments, the method further comprises a TCR value verification step: after calculating the TCR value according to the TCR self-learning algorithm, taking the external environment temperature as the starting temperature T0', to verify the reliability of the TCR value.

[0096] That is, after estimating the TCR value according to the TCR self-learning algorithm, taking the external environment temperature as the starting temperature T0', and comparing the theoretical temperature calculated based on the TCR value and the starting temperature T0' with the measured temperature, to verify the availability of the TCR value. For example, if the comparison result is within the preset allowable range, it is considered that the TCR value has availability, and vice versa.

[0097] It should be noted that during the heating process of the heat generating body, the electrical energy input from the power supply (power supply component) : part of the internal energy of the heat generating body , for increasing the temperature of the heat generating body, and the other part is lost due to radiation and convection. Therefore, the instantaneous electric power of the heat generating body when heated at a certain temperature rise rate is:

[0098] = + (1)

[0099] When the heat generating body reaches a thermal equilibrium state under continuous heating, within time, the instantaneous thermal equilibrium equation is:

[0100] ​ = + (2)

[0101] Taking Laplace transform of equation (2) can obtain:

[0102] = (3)

[0103] wherein, is the working power of the voltage, is the thermal conductivity (equal to the heat dissipated from the heat generating body per unit area per unit time when the temperature is 1℃), is the surface area of the heat generating body, is the temperature rise of the heat generating body, is the specific heat capacity of the heat generating body, is the mass of the heat generating body.

[0104] Exemplarily, as shown in FIG. 5, it is the measured temperature data of the heat generating body reaching the thermal equilibrium state within 150S when the second power is 3w (suction power). Wherein, the X axis is the sampling point number, sampling once every 100ms, a total of 1500 sampling points; the Y axis is the temperature data of the heat generating body measured by the temperature measuring film in the aerosol generating device. It can be seen from the figure that the temperature of the temperature measuring film in the aerosol generating device will gradually stabilize or change very slowly with the heating, that is, it reaches the thermal equilibrium state.

[0105] It can be understood that the calculation formula of TCR value is as follows:

[0106] TCR= (R2-R1) / (R1*(T2-T1)) = ΔR / (R1*ΔT) (4)

[0107] According to equation (4), it can be obtained that:

[0108] ΔT= ΔR / (TCR*R1) (5)

[0109] ΔR=(TCR*R1)*ΔT (6)

[0110] Generally, for a known metal temperature sensing film, its corresponding TCR and R1 are fixed values, that is, the temperature rise ΔT and the resistance rise ΔR are linearly related. The temperature change can be indirectly obtained by detecting the change in resistance. When a small power is output to the heating element, after a period of time, the energy input from the battery and the energy taken away by the loss are in a relatively stable state. At this time, the temperature no longer continues to rise and becomes stable in the region. This is equivalent to ΔT approaching 0 during a certain heating period. According to formula (6), when ΔT approaches 0, ΔR approaches 0; conversely, according to formula (5), when ΔR approaches 0, ΔT approaches 0.

[0111] Moreover, the specific values ​​of ΔR and R1 can be obtained by measuring through the sampling circuit (the specific sampling circuit can be referred to the existing technology, which will not be described in detail here). Then, the TCR value can be calculated by using formula (4).

[0112] In some embodiments, referring to FIG4, the step of adjusting the current heating element temperature measured by the temperature sensing film according to the TCR value further includes:

[0113] S504. Determine the resistance rise ΔR of the temperature measuring film under heating conditions.

[0114] S505. Using the initial heating element temperature as the starting temperature T0, and adjusting the current heating element temperature measured by the temperature sensing film based on the resistance rise ΔR, the initial resistance value R0, the starting temperature T0, and the TCR value, the adjusted heating element temperature is the real-time temperature T of the heating element during heating. i .

[0115] The specific formula is as follows:

[0116] T i =ΔR / (TCR*R0)+T 0 (7)

[0117] Furthermore, after obtaining the real-time temperature T i Then, using a differential algorithm, the real-time temperature T is... i Subtract the initial temperature T0 to obtain the temperature rise difference temperature. Then add the temperature rise difference temperature to the initial temperature of the cigarette holder cavity to obtain the real-time temperature T of the calibrated heating element. i '.

[0118] The specific formula is as follows:

[0119] T i '=(T i -T0) + initial cigarette holder temperature (8)

[0120] The embodiment obtains the TCR value of the temperature measuring film through the TCR self-learning algorithm, and then calibrates the temperature of the heating body measured by the temperature measuring film through the differential algorithm to obtain a more accurate real-time heating body temperature, thereby effectively improving the accuracy of temperature measurement of the aerosol generating device, facilitating accurate temperature control of the aerosol generating process, reducing the influence on taste, and improving user experience.

[0121] In another embodiment disclosed in the present application, the aerosol generating device of the embodiment comprises:

[0122] A first temperature measuring element (not shown) is arranged on the aerosol generating device to detect the temperature of the external environment. Optionally, the first temperature measuring element can be an NTC arranged near the outer surface of the aerosol generating device.

[0123] A second temperature measuring element (not shown) is arranged to detect the temperature of the cigarette accommodating cavity. Optionally, the second temperature measuring element can be an NTC (thermistor) arranged near the heating cavity (not shown).

[0124] A temperature measuring film is arranged to detect the temperature of the heating body.

[0125] A power supply assembly is arranged to provide power supply to the heating body.

[0126] A controller is arranged to execute the steps of the method for controlling aerosol generation in the aerosol generating device by calling the computer program stored in the memory.

[0127] Alternatively, the aerosol generating device of the embodiment can be center heating or perimeter heating. That is, the method for controlling aerosol generation in the aerosol generating device is applicable to both center heating and perimeter heating. Moreover, when it is perimeter heating, the temperature of the heating body in the perimeter heating cavity measured by the temperature measuring film is generally higher than the temperature of the cigarette accommodating cavity in the heating state.

[0128] In a specific embodiment, taking center heating as an example, the aerosol generating device further comprises a heating structure 1 for heating the aerosol forming substrate, as shown in FIGS. 6 to 8. The heating structure 1 comprises a heating element 20 having a heating portion 21, a tube 10 sleeved on the outer periphery of the heating portion 21 and transparent to infrared light, and the tube 10 is arranged in a spaced manner with at least part of the heating portion 21. The heating portion 21 has a heating body 211.

[0129] It should be noted that the aerosol generating device can heat the aerosol generating substrate in a heating-not-burning manner. In some embodiments, the aerosol generating substrate can be in the form of a columnar solid material made of leaves and / or stems of plants (for example, tobacco) and / or strips, pieces, granules, or one-piece materials, and can further contain aroma components. The aerosol generating device can include a heating structure 1 and a power supply assembly (not shown). The heating structure 1 can be at least partially inserted into the aerosol generating substrate to heat the aerosol generating substrate by radiating infrared light, so that the aerosol generating substrate generates aerosol for a user to inhale. The power supply assembly (not shown) is connected to the heating structure 1 to supply power to the heating structure 1.

[0130] In some embodiments, the heating structure 1 further includes a support 30 at least partially installed in the tube 10 to support the heating element 20, and arranged along the axial direction of the tube 10 and sequentially arranged with the heating portion 21. The support 30 has a first end 30a and a second end 30b in the axial direction, the first end 30a is arranged close to the heating portion 21, and the second end 30b is arranged away from the heating portion 21.

[0131] In the power-on working state, the heating element 20 can quickly heat up to about 1000°C, and the surface temperature of the tube 10 can be controlled at about 350°C, and the atomization temperature of the aerosol generating substrate can be controlled at 300-350°C, so that the aerosol generating substrate is precisely atomized mainly in the infrared light 2-4.75um wave band and 8-11um wave band. The tube 10 is arranged on at least part of the heating element 20, and the infrared light can pass through the tube 10 to the aerosol generating substrate. The support 30 can be at least partially installed in the tube 10 and assembled with the heating element 20, and can support the heating element 20. The temperature measuring element 40 is at least partially installed in the tube 10 and arranged on the support 30, and can monitor the temperature in the tube 10.

[0132] In some embodiments, the tube 10 can be a quartz glass tube. Of course, it can be understood that in other embodiments, the tube 10 is not limited to an infrared transparent quartz tube, and can be other window materials that can transmit light waves, such as transparent ceramics, diamond, etc.

[0133] In some embodiments, the tube body 10 can be arranged to cover a part of the outer periphery of the heating element 20 to form a heating structure, so as to avoid direct contact between the heating element 20 and the aerosol generating substrate. The tube body 10 is arranged to be spaced apart from the part of the heating element 20, and the tube body 10 includes a main body portion 11 and a pointed top portion 12. The main body portion 11 can be in a cylindrical shape and hollow. It can be understood that in other embodiments, the main body portion 11 is not limited to a cylindrical shape, but can be in a cuboid shape or other shapes. The pointed top portion 12 is arranged at one end of the main body portion 11, and the pointed top portion 12 can facilitate insertion and removal of at least part of the heating structure 1 in the aerosol generating substrate. The pointed top portion 12 can be a cone. In some embodiments, an accommodation cavity 13 is formed inside the tube body 10. The accommodation cavity 13 is a cylindrical accommodation cavity and can be arranged to be non-sealed. When the heating element 20 is installed therein, the accommodation cavity 13 can not need to be evacuated or filled with inert gas. In the present embodiment, the tube body 10 has a tube opening 14 arranged at an end of the main body portion 11 away from the pointed top portion 12 and in communication with the accommodation cavity 13, for loading the heating element 20 into the accommodation cavity 13.

[0134] In some embodiments, the heating element 20 can include a heating portion 21. The heating portion 21 is arranged in the tube body 10 and is arranged to be spaced apart from the tube wall of the tube body 10 at least in part. Specifically, the heating portion 21 can be arranged to be spaced apart from the tube wall of the main body portion 11 as a whole, and can radiate infrared light in a powered state. The infrared light can pass through the tube body 10 and reach the aerosol generating substrate. In some embodiments, the heating portion 21 is substantially in a cylindrical or tubular shape, which can be substantially in a spiral cylindrical shape and can be formed by winding at least one heating body 211 capable of radiating infrared light. The heating portion 21 is provided with a central rod 212 arranged coaxially with the heating portion 21. The central rod 212 can pass out of both ends of the heating portion 21 and be connected to one end of the heating portion 21 facing the pointed top portion 12. In some embodiments, the central rod 212 can be a conductive body or a resistance heating body.

[0135] The heating element 20 can include a first electrical connection portion 22 and a second electrical connection portion 23. The first electrical connection portion 22 and the second electrical connection portion 23 are arranged at one end of the heating portion 21 away from the pointed top portion 12 and can pass out of the tube opening 14. The first electrical connection portion 22 can be connected to the central rod 212, and the second electrical connection portion 23 can be connected to one end of the heating portion 21 away from the pointed top portion 12. The first electrical connection portion 22 and the second electrical connection portion 23 can be conductive wires or conductive columns, etc. The first electrical connection portion 22 can be connected to the central rod 212 by welding, and the second electrical connection portion 23 can be connected to one end of the heating body 211 by welding.

[0136] In some embodiments, the support 30 can be a column, which can be at least partially installed into the tube body 10 from the tube mouth 14, and can support the heating element 20. In some embodiments, the support 30 can be disposed close to the tube mouth 14, and sequentially disposed with the heating portion 21 along the axial direction of the tube body 10. In some embodiments, the support 30 can be an insulating member as a whole, and can be used to insulate the first electrical connection portion 22 and the second electrical connection portion 23. The support 30 can be ceramic, quartz, or high-temperature-resistant plastic. The support 30 can have a cross section in a substantially circular shape, and the outer diameter of the support 30 can be comparable to the inner diameter of the tube body 10. In some embodiments, the support 30 can have a first end 30a and a second end 30b. The first end 30a and the second end 30b are oppositely disposed and located along the axial direction of the support 30. The first end 30a can be disposed close to the heating portion 21, and the second end 30b can be disposed away from the heating portion 21 and can be located outside the tube body 10.

[0137] In some embodiments, the support 30 can be provided with a first passage 31, which can be penetrated through the first end 30a to the second end 30b of the support 30 along the axial direction of the support 30. The first passage 31 can be defined by a central through hole formed on the support 30. The first passage 31 can be used for the first electrical connection portion 22 to pass through. In some embodiments, the first passage 31 can be omitted. The first passage 31 can be used to fix the first electrical connection portion 22 to the support 30 by means of glue (adhesive), so as to prevent the heating element 20 from being displaced during assembly.

[0138] In some embodiments, the support 30 can be provided with a second passage 32, which can be penetrated through the first end 30a to the second end 30b of the support 30 along the axial direction of the support 30, and can be disposed in a radial direction to be spaced apart from the first passage 31. The second passage 32 can be used for the second electrical connection portion 23 to pass through. The second passage 32 can be defined by a through slot formed on the side wall of the support 30. The second passage 32 can be used to fix the second electrical connection portion 23 to the support 30 by means of glue (adhesive), so as to prevent the heating element 20 from being displaced during assembly.

[0139] As shown in FIG. 9 and FIG. 10, in some embodiments, the temperature measuring element 40 can comprise a temperature measuring film 41. The temperature measuring film 41 can be a TCR temperature measuring film. It is to be noted that TCR refers to temperature coefficient resistance, and the TCR temperature measuring film can be a material with a large temperature coefficient resistance. The temperature measuring film 41 is arranged on the first end 30a of the support 30, and can be used to monitor the temperature in the pipe body 10, and improve the sensitivity and accuracy of temperature measurement. Specifically, the temperature measuring film 41 can be wrapped around the outer wall of part of the support 30 along the circumferential direction of the support 30, and specifically, in some embodiments, the temperature measuring film 41 can be formed on the support 30 by a PVD or printing process. In some embodiments, the first end 30a of the support 30 has an end face, and the temperature measuring film 41 can extend to at least part of the end face of the first end 30a, i.e., the end face of the first end 30a can be covered by the temperature measuring film 41. The temperature measuring film 41 can be in contact with part of the inner wall of the pipe body 10, i.e., the outer periphery of the temperature measuring film 41 can be in contact with the inner wall of the pipe body 10 arranged opposite thereto. In other embodiments, a gap can be provided between the temperature measuring film 41 and at least part of the inner wall of the pipe body 10, and the width of the gap can be greater than 0 and less than or equal to 0.3 mm.

[0140] The temperature measuring element 40 can comprise two conductive units 42 arranged at intervals in the circumferential direction of the temperature measuring film 41 and connected to the temperature measuring film 41. Each conductive unit 42 can be at least partially arranged on the support 30 and extend along the axial direction of the support 30. The two conductive units 42 can be arranged in insulation by the support 30. In some embodiments, each conductive unit can comprise a first conductive part 421 and a second conductive part 422, and the first conductive part 421 and the second conductive part 422 can be two conductive pieces of different materials. The first conductive part 421 can be arranged on the surface of the support 30, and one end thereof is connected to the temperature measuring film 41, and the other end thereof can extend to the second end 30b of the support 30. In some embodiments, the first conductive part 421 can be a conductive sheet or a conductive film wrapped around the support 30, such as a copper sheet, a copper foil, etc., or a conductive coating coated on the outer wall of the support 30, such as a conductive metal coating. The second conductive part 422 can be connected to the first conductive part 421 and can be in the form of a column extending from the pipe opening 14 to the outside of the pipe body 10. The second conductive part 422 can be a conductive wire or a conductive column. In other embodiments, the first conductive part 421 or the second conductive part 422 of the conductive unit 42 can also be omitted, i.e., the conductive unit 42 can be a single conductive piece.

[0141] In some embodiments, the heat generating structure 1 further comprises a fixing flange 50, which is sleeved on one end of the pipe body 10 having the pipe opening 14 and on a section of the support member 30 penetrating through the pipe body 10, and can support the pipe body 10 and the support member 30. A limiting step 51 is arranged inside the fixing flange 50, and the one end of the pipe body 10 having the pipe opening 14 can abut against the limiting step 51, and the pipe body 10 between the fixing flange 50 can be fixed by the first adhesive 60. The first adhesive 60 can be a paste-like adhesive, which can play a role of fixing and sealing. The gap between the support member 30 and the inner wall of the fixing flange 50 is less than or equal to 0.2 mm. In some embodiments, the support member 30 and the fixing flange 50 can be fixed by the second adhesive 70. The second adhesive 70 can be a paste-like adhesive, which can play a role of fixing and sealing.

[0142] Those skilled in the art will further appreciate that the individual steps of the examples described in connection with the embodiments disclosed herein can be realized by electronic hardware, computer software, or any combination thereof. To clearly illustrate this interchangeability of hardware and software, various examples have been described herein in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

[0143] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in random access memory (RAM), flash memory, read-only memory (ROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0144] It can be understood that the above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent of the present application. It should be noted that for those skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and some modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. A method for controlling aerosol generation in an aerosol generating device, characterized in that, Includes the following steps: The external ambient temperature is obtained from the first temperature measuring element disposed on the aerosol generating device, and the initial temperature of the cigarette holder cavity is obtained from the second temperature measuring element. The initial temperature of the heating element is obtained from the thermometric membrane used to detect the temperature of the heating element; Determine whether the initial temperature of the cigarette holder cavity meets preset conditions with respect to the external ambient temperature and the initial temperature of the heating element, respectively. If so, the current heating element temperature measured by the temperature measuring membrane is calibrated based on the initial heating element temperature and the initial cigarette holder cavity temperature to obtain the calibrated heating element temperature.

2. The method for controlling aerosol generation in an aerosol generating device according to claim 1, characterized in that, Before the step of calibrating the current heating element temperature measured by the temperature measuring membrane based on the initial heating element temperature and the initial cigarette holder cavity temperature, the method further includes: During the heating phase, the TCR value of the temperature sensing membrane is calculated using a TCR self-learning algorithm, and the current heating element temperature measured by the temperature sensing membrane is adjusted according to the TCR value.

3. The method for controlling aerosol generation in an aerosol generating device according to claim 2, characterized in that, The step of calculating the TCR value of the temperature-sensing membrane according to the TCR self-learning algorithm during the heating stage includes: A first power is input to the temperature sensing membrane for a first preset time to obtain the initial resistance value R0 of the temperature sensing membrane; A second power is input to the temperature-sensing membrane for a second preset duration, and the resistance value R of the temperature-sensing membrane during this period is recorded. xi Regarding the resistance value R xi Filtering is performed to obtain the stable resistance value R. xs ; Based on the initial resistance value R0, the resistance value R xs And the temperature rise data ΔT under the second power thermal equilibrium state in the pre-stored sample database. xs The TCR value is calculated. Wherein, the first power is less than the second power; and the first preset duration is less than the second preset duration.

4. The method for controlling aerosol generation in an aerosol generating device according to claim 3, characterized in that, The step of inputting a first power to the temperature-sensing membrane for a first preset time to obtain the initial resistance value R0 of the temperature-sensing membrane includes: A first power is input to the temperature sensing membrane for a first preset time, and the voltage and current values ​​during this period are obtained through analog-to-digital sampling. The initial resistance value R0 of the temperature sensing membrane is calculated based on the voltage and current values ​​and Ohm's law.

5. The method for controlling aerosol generation in an aerosol generating device according to claim 3, characterized in that, The second power is continuously input to the temperature sensing membrane for a second preset duration, and the resistance value R of the temperature sensing membrane during this period is recorded. xi Regarding the resistance value R xi Filtering is performed to obtain the stable resistance value R. xs The steps include: A second power is input to the temperature-sensing membrane for a second preset duration, and the resistance value R of the temperature-sensing membrane is recorded every third preset duration. xi The recorded resistance value R is processed using a preset filtering algorithm. xi Filtering is performed to obtain the stable resistance value R. xs .

6. The method for controlling aerosol generation in an aerosol generating device according to claim 3, characterized in that, The first power is 0.1W; and / or The second power is 2.5W, 3W, 3.5W, or 4W; and / or The first preset duration is 10ms; and / or The second preset duration is 60 seconds.

7. The method for controlling aerosol generation in an aerosol generating apparatus according to any one of claims 3 to 6, characterized in that, The step of adjusting the current heating element temperature measured by the temperature sensing film according to the TCR value further includes: Determine the resistance rise ΔR of the temperature sensing membrane when it is in a heated state; Using the initial heating element temperature as the starting temperature T0, and adjusting the current heating element temperature measured by the temperature sensing film according to the resistance rise value ΔR, the initial resistance value R0, the starting temperature T0, and the TCR value, the adjusted heating element temperature is the real-time temperature T of the heating element during heating. i .

8. The method for controlling aerosol generation in an aerosol generating apparatus according to claim 7, characterized in that, The step of calibrating the current heating element temperature measured by the temperature measuring membrane based on the initial heating element temperature and the initial cigarette holder cavity temperature to obtain the calibrated heating element temperature includes: The real-time temperature T i Subtracting the initial temperature T0 yields the temperature rise difference temperature. Then, adding this temperature rise difference temperature to the initial temperature of the cigarette holder cavity gives the real-time temperature T of the calibrated heating element. i '.

9. The method for controlling aerosol generation in an aerosol generating device according to claim 1, characterized in that, The step of determining whether the initial temperature of the cigarette holder cavity meets preset conditions with respect to the external ambient temperature and the initial temperature of the heating element includes: Determine whether the following conditions are met simultaneously: First condition: The temperature deviation between the cigarette holder cavity and the external ambient temperature is within a first preset deviation range; The second condition is that the temperature of the heating element deviates from the temperature of the cigarette holder cavity within a second preset deviation range.

10. The method for controlling aerosol generation in an aerosol generating apparatus according to claim 9, characterized in that, The first preset deviation range is between ±2℃; and / or The second preset deviation range is between ±10℃.

11. The method for controlling aerosol generation in an aerosol generating apparatus according to claim 1, characterized in that, The method also includes a TCR value verification step: After calculating the TCR value according to the TCR self-learning algorithm, the external ambient temperature is used as the starting temperature T0' to verify the reliability of the TCR value.

12. An aerosol generating device, characterized in that, include: A first temperature sensing element is installed on the aerosol generating device for detecting the external ambient temperature; A second temperature sensing element used to detect the temperature of the cigarette holder cavity; A temperature-sensing membrane used to detect the temperature of the heating element; A power supply component for providing power to the heating element; A controller, wherein the controller is configured to perform the steps of the method for controlling aerosol generation in an aerosol generating apparatus as described in any one of claims 1 to 11 by invoking a computer program stored in a memory.

13. The aerosol generating apparatus according to claim 12, characterized in that, The aerosol generating device includes a heating structure (1) for heating the aerosol forming matrix. The heating structure (1) includes a heating element (20) with a heating part (21), a tube (10) sleeved on the outer periphery of the heating part (21) and transmitting infrared light, and a support member (30). The tube body (10) is spaced apart from at least a portion of the heating element (21); the heating element (21) has a heating element (211). The support member (30) is at least partially installed in the tube body (10) to support the heating element (20), and is arranged sequentially with the heating part (21) along the axial direction of the tube body (10). The support member (30) has a first end (30a) and a second end (30b) in the axial direction. The first end (30a) is arranged close to the heating part (21), and the second end (30b) is arranged away from the heating part (21). The temperature measuring membrane (41) is disposed at the first end (30a) of the support member (30).

14. The aerosol generating apparatus according to claim 13, characterized in that, The temperature measuring membrane (41) covers a portion of the outer wall of the support member (30) circumferentially; and / or The first end (30a) has an end face, and the temperature-sensing membrane (41) extends to at least a portion of the end face; and / or The temperature measuring membrane (41) is in contact with part of the inner wall of the tube (10).

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