Microwave control system of aerosol generating device and electronic atomization equipment

Abstract

The invention provides a microwave control system of an aerosol generating device and electronic atomization equipment, and relates to the technical field of electronic atomization equipment. According to the method and the device, whether the user grabs the aerosol generating device and lifts the hand or not is judged according to the palm contact data between the palm of the user and the outer surface of the shell of the aerosol generating device and the elbow movement data in the movement process of the elbow; when the user smokes the aerosol generating device, it is considered that the user smokes the aerosol generating device in a subsequent short time, before the user smokes the aerosol generating device, namely in the process that the user holds the aerosol generating device and lifts the hand, the microwave generating circuit is controlled to generate an initial microwave signal, and the power amplifying circuit is controlled to amplify the power of the initial microwave signal; and the obtained target microwave signal is used for preheating the aerosol generating body before smoking, so that the phenomenon of instantaneous heating of the aerosol generating body when a user smokes in a traditional scheme is avoided, and the service life of the electronic atomization equipment is prolonged.

Description

Technical field

[0001] The present application relates to the technical field of electronic atomization equipment, and in particular to a microwave control system of an aerosol generating device and an electronic atomization equipment. [Background Technology]

[0002] The core components of an electronic atomization device include an MCU (Micro Control Unit), a power supply, an aerosol generator, and a heating element mounted on the aerosol generator. The MCU uses the power supply to transmit electrical energy to the heating element, causing it to heat up. The heat emitted by the heating element heats the aerosol generator and generates aerosol, which is then inhaled by the user. In related technologies, in addition to using the heat emitted by the heating element to heat the aerosol generator, microwaves (a type of electromagnetic wave) can also be used to heat the aerosol generator, which has the advantages of high heating efficiency and speed. However, when using microwaves to heat an aerosol generator, it is necessary to provide high-power, high-frequency microwaves within the pulse time. Although high-power, high-frequency microwaves can instantly increase the temperature of the aerosol generator to a level that can atomize aerosols, or in other words, can instantly increase the electrical power of the heated aerosol generator to a level that can atomize aerosols, this instantaneous increase will reduce the service life of the electronic atomization device. At the same time, high-power, high-frequency microwaves will also bring about defects such as electromagnetic exposure, electromagnetic compatibility, and local overheating of the impedance mutation part of the microwave source or microwave radiator. Furthermore, if you want to improve the above defects, you need to extend the heating time of the aerosol generator, that is, extend the time it takes for the electrical power of the heated aerosol generator to reach a level that can atomize aerosols. Although this time extension method improves the above defects, it cannot guarantee the original pump-and-stop function of the electronic atomization device. Therefore, it is necessary to improve the existing microwave heating scheme for aerosol generators. [Summary of the invention]

[0003] The present application provides a microwave control system for an aerosol generating device and an electronic atomization device, aiming to solve the problem of insufficient service life of the electronic atomization device caused by the instantaneous increase in electric power / temperature when using microwaves to heat the aerosol generator in the related art.

[0004] In order to solve the above-mentioned technical problems existing in the relevant technology, the first aspect of an embodiment of the present application provides a microwave control system for an aerosol generating device, wherein the aerosol generating device includes a shell and a microwave radiator and an aerosol generator arranged in the shell, and the aerosol generator is placed in the microwave radiator; the microwave control system is arranged in the shell, and the microwave control system includes a microwave generating circuit, a power amplifying circuit, a microwave output circuit and a single-chip microcomputer, the microwave generating circuit, the power amplifying circuit and the microwave output circuit are connected in sequence, the microwave generating circuit and the power amplifying circuit are respectively connected to the single-chip microcomputer, and the single-chip microcomputer includes a first feedback unit, a second feedback unit and a control unit. Specifically, the first feedback unit is used to obtain palm contact data between the palm and the outer surface of the shell; the second feedback unit is used to obtain elbow movement data during the elbow movement process; the control unit is used to determine whether a grabbing event of the aerosol generating device occurs before inhalation based on the palm contact data, and determine whether a hand-raising event of holding the aerosol generating device before inhalation occurs based on the elbow movement data, and output a microwave generation instruction and a power amplification instruction when a grabbing event and a hand-raising event occur; the microwave generating circuit is used to respond to the microwave generation instruction to output an initial microwave signal; the power amplification circuit is used to respond to the power amplification instruction to enter a conduction state allowing signal transmission, and power-amplify the initial microwave signal to obtain a target microwave signal; the microwave output circuit is used to output the target microwave signal to the microwave radiator, so that the microwave radiator radiates the target microwave signal onto the aerosol generator to preheat the aerosol generator before inhalation.

[0005] The second aspect of the embodiment of the present application provides an electronic atomization device, which includes an aerosol generating device and the microwave control system mentioned in the first aspect of the embodiment of the present application. The aerosol generating device includes a shell and a microwave radiator and an aerosol generator arranged in the shell. The aerosol generator is placed in the microwave radiator, and the microwave control system is arranged in the shell.

[0006] It can be understood that through the implementation of the above technical solutions of the present application, the first feedback unit can obtain the palm contact data between the user's palm and the outer surface of the shell of the aerosol generating device, and the second feedback unit can obtain the elbow movement data of the user's elbow during the movement. The control unit can determine whether the user has grasped the aerosol generating device before inhalation based on the palm contact data, and determine whether the user has raised his hand while holding the aerosol generating device before inhalation based on the elbow movement data, and output a microwave generation instruction and a power amplification instruction when a grasping event and a hand-raising event occur. The microwave generating circuit can respond to the microwave generation instruction to output an initial microwave signal, and the power amplification circuit can respond to the power amplification instruction to enter a conductive state allowing signal transmission, and power-amplify the initial microwave signal to obtain a target microwave signal. Finally, the microwave output circuit outputs the target microwave signal to the microwave radiator, so that the microwave radiator radiates the target microwave signal onto the aerosol generator to preheat the aerosol generator before inhalation. It can be seen from this that the microwave generating circuit will not generate an initial microwave signal when it has not received the microwave generating instruction sent by the control unit, and the power amplifying circuit will not allow signal transmission when it has not received the power amplifying instruction sent by the control unit, that is, it will not allow any signal (such as the initial microwave signal) to be transmitted through itself to the microwave output circuit, and of course it will not power amplify any signal. Before inhaling, the user will inevitably hold the aerosol generating device and move it to his lips. During the movement, the user's elbow will inevitably move. Based on this, when the application determines that the user has grabbed the aerosol generating device and raised his hand based on the palm contact data and the elbow movement data, it can be considered that the user will inhale in a short period of time afterwards. Then before the user inhales (that is, before the user In the process of raising the hand holding the aerosol generating device), the present application will control the microwave generating circuit to generate the initial microwave signal, and control the power amplifier circuit to enter the conduction state allowing signal transmission, so as to use the power amplifier circuit to amplify the power of the transmitted initial microwave signal and obtain the target microwave signal accordingly. The obtained target microwave signal will be output by the power amplifier circuit to the microwave radiator, thereby realizing preheating of the aerosol generator before the user inhales, thereby avoiding the instantaneous heating phenomenon of the aerosol generator when the user inhales in the traditional scheme (that is, the temperature of the aerosol generator instantly rises to the point where it can atomize out the aerosol, or in other words, the electric power for heating the aerosol generator instantly rises to the point where it can atomize out the aerosol), thereby improving the service life of the electronic atomization device.

Brief Description of the Drawings

[0007] In order to more clearly illustrate the relevant technologies or the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the relevant technologies or the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, not all embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0008] Figure 1 A first structural block diagram of a microwave control system provided in an embodiment of the present application;

[0009] Figure 2 A second structural block diagram of the microwave control system provided in an embodiment of the present application;

[0010] Figure 3 This is a third structural block diagram of the microwave control system provided in an embodiment of the present application;

[0011] Figure 4 A power diagram of the target microwave signal in different control stages provided by an embodiment of the present application;

[0012] Figure 5 This is a fourth structural block diagram of the microwave control system provided in an embodiment of the present application;

[0013] Figure 6 This is a diagram estimating the power of the leaked electromagnetic signal radiated to the outside provided in an embodiment of the present application. [Specific implementation method]

[0014] In order to make the purpose, technical solutions and advantages of the present application more obvious and easy to understand, the present application will be clearly and completely described below in conjunction with the embodiments of the present application and the corresponding drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. It should be understood that the various embodiments of the present application described below are only used to explain the present application and are not used to limit the present application, that is, based on the various embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0015] In the related art, when using microwaves to heat the aerosol generator, it is necessary to provide high-power, high-frequency microwaves within the pulse time. Although high-power, high-frequency microwaves can instantly increase the temperature of the aerosol generator to a level that can atomize out the aerosol, or in other words, can instantly increase the electric power of heating the aerosol generator to a level that can atomize out the aerosol, this instantaneous increase phenomenon will reduce the service life of the electronic atomization device. At the same time, high-power, high-frequency microwaves will also bring about defects such as electromagnetic exposure, electromagnetic compatibility, and local overheating of the impedance mutation part of the microwave source or microwave radiator. Furthermore, if you want to improve the above defects, you need to extend the heating time of the aerosol generator, that is, extend the time for the electric power of heating the aerosol generator to reach a level that can atomize out the aerosol. Although this time extension method improves the above defects, it cannot guarantee the original pump-and-stop function of the electronic atomization device. To this end, the present application proposes a microwave control system for an aerosol generating device in the following embodiments to control the entire process of microwave heating of the aerosol generator. It adds a step of preheating the aerosol generator before the user inhales, which can avoid the instantaneous increase in electric power / temperature in traditional solutions, thereby improving the service life of the electronic atomization device; at the same time, the microwave control system can also monitor in real time whether there is a hidden danger of electromagnetic exposure during the user's inhalation process. Once the hidden danger of electromagnetic exposure is detected, the microwave control system can take corresponding safety actions in time (such as cutting off the power supply), thereby ensuring the user's life safety.

[0016] It should be noted that the microwave control system can be applied to electronic atomization equipment. When the microwave control system is configured in the electronic atomization equipment, the microwave control system can control the aerosol generating device in the electronic atomization equipment to generate aerosol. At the same time, the electronic atomization equipment also has all the advantages of the microwave control system. Specifically, the aerosol generating device in the electronic atomization device includes a shell, a microwave radiator and an aerosol generator. The microwave radiator and the aerosol generator are both arranged in the shell. The microwave radiator serves as a container for the aerosol generator. The microwave radiator can receive microwave signals and radiate the received microwave signals to the aerosol generator to heat the aerosol generator. When the temperature of the aerosol generator rises to a certain value after being heated, it will atomize an aerosol, and the aerosol can be inhaled by the user. Preferably, the aerosol generator is arranged in the microwave radiator. Of course, this is only one assembly form of the two. In fact, the aerosol generator can also be arranged on or outside the microwave radiator, as long as the microwave radiator can radiate the microwave signal it receives to the aerosol generator and heat the aerosol generator to generate aerosol. In addition, it should be noted that the aerosol generating device and the microwave control system are both core components of the electronic atomization device. Usually, the shell of the aerosol generating device also serves as the outer shell of the electronic atomization device.

[0017] Figure 1 This is a first structural block diagram of a microwave control system. In some embodiments, the microwave control system is arranged in a shell and includes a microwave generating circuit 110, a power amplifier circuit 120, a microwave output circuit 130 and a single-chip microcomputer 140 for data processing and control. The microwave generating circuit 110, the power amplifier circuit 120 and the microwave output circuit 130 are connected in sequence, and the microwave generating circuit 110 and the power amplifier circuit 120 are respectively connected to the single-chip microcomputer 140. The single-chip microcomputer 140 includes a first feedback unit 141, a second feedback unit 142 and a control unit 143. During the actual heating control process, the first feedback unit 141 can obtain the palm contact data between the user's palm and the outer surface of the shell of the aerosol generating device, and the second feedback unit 142 can obtain the elbow movement data of the user's elbow during the movement process. The control unit 143 can determine whether the user has grasped the aerosol generating device before inhalation based on the palm contact data, and determine whether the user has raised his hand to hold the aerosol generating device before inhalation based on the elbow movement data, and output a microwave generation instruction and a power amplification instruction when the grasping event and the hand raising event occur. The microwave generating circuit 110 can respond to the microwave generation instruction to output the initial microwave signal, and the power amplification circuit 120 can respond to the power amplification instruction to enter the conduction state allowing signal transmission, and power amplify the initial microwave signal to obtain the target microwave signal. Finally, the microwave output circuit 130 outputs the target microwave signal to the microwave radiator, so that the microwave radiator radiates the target microwave signal to the aerosol generator to pre-heat the aerosol generator before inhalation. Preferably, the microwave generating circuit 110 of the present application has the ability to self-regulate the output frequency, that is, the microwave generating circuit 110 can adjust its own output frequency between 0.5 and 20 GHz according to the resonant frequency of the load after the aerosol generator is inserted into the microwave radiator.

[0018] It is understandable that the microwave generating circuit 110 will not generate an initial microwave signal when it has not received the microwave generating instruction sent by the control unit 143, and the power amplifying circuit 120 will not allow signal transmission when it has not received the power amplifying instruction sent by the control unit 143, that is, it will not allow any signal (such as the initial microwave signal) to be transmitted through itself to the microwave output circuit 130, and of course it will not power amplify any signal. Before inhaling, the user will inevitably hold the aerosol generating device and move the aerosol generating device to his lips. During the movement, the user's elbow will inevitably move. Based on this, when the application determines that the user has grabbed the aerosol generating device and raised his hand based on the palm contact data and the elbow movement data, it can be considered that the user will inhale in a short period of time afterwards. Then, before the user inhales (that is, when the user holds the aerosol generating device), In the process of raising the hand), the present application will control the microwave generating circuit 110 to generate an initial microwave signal, and control the power amplifier circuit 120 to enter a conductive state allowing signal transmission, so as to use the power amplifier circuit 120 to amplify the power of the transmitted initial microwave signal and obtain the target microwave signal accordingly. The obtained target microwave signal will be output to the microwave radiator by the power amplifier circuit 120, and the microwave radiator will radiate the target microwave signal it receives to the aerosol generator, thereby realizing preheating of the aerosol generator before the user inhales, thereby avoiding the instantaneous heating phenomenon of the aerosol generator when the user inhales in the traditional scheme (that is, the temperature of the aerosol generator instantly rises to a level that can atomize out aerosol, or in other words, the electric power for heating the aerosol generator instantly rises to a level that can atomize out aerosol), thereby improving the service life of the electronic atomization device.

[0019] As one example, see Figure 1A first sensor cluster 150 is provided on the outer surface of the shell. The first sensor cluster 150 is composed of a plurality of first sensors distributed at different positions. Each first sensor in the first sensor cluster 150 is embedded inward from the outer surface of the shell. The purpose is to ensure the smoothness of the outer surface of the shell and avoid a scratchy feeling when the user holds the aerosol generating device. The first sensor cluster 150 can collect palm contact data in real time by relying on its own plurality of first sensors, and transmit the collected palm contact data to the first feedback unit 141 in the single-chip microcomputer 140. In some implementations of this embodiment, some of the first sensors in the first sensor cluster 150 use pressure sensors and other part of the first sensors use temperature sensors. Based on this, when the user holds the aerosol generating device, the pressure of the part covered by the user's palm on the outer surface of the shell can be obtained through each pressure sensor, and the temperature of the part covered by the user's palm on the outer surface of the shell can be obtained through each temperature sensor. At the same time, the area of ​​the part covered by the user's palm on the outer surface of the shell can be calculated by detecting the pressure at which pressure sensors on the shell are located. That is to say, the palm contact data of the present application at least includes the area data, pressure data and temperature data of the part covered by the user's palm on the outer surface of the shell.

[0020] Furthermore, the user will inevitably grasp the aerosol generating device before taking a puff. For this pre-puff grasping, the contact area, pressure, temperature between the user's palm and the outer surface of the housing, and the duration of the user's grasping of the aerosol generating device all conform to certain rules. For example, the grasping duration should not be too short, the contact area and pressure between the palm and the outer surface of the housing should not be too small, and the temperature between the palm and the outer surface of the housing should be close to the palm's body surface temperature. In view of this, the specific process for the control unit 143 to determine whether a grasping event has occurred based on the palm contact data is as follows: determining whether at least two of the area data, pressure data, and temperature data are greater than their respective preset thresholds, and whether the duration of the above-preset thresholds is within a preset time range; if so, determining that a grasping event has occurred. For example, if the area data is greater than a preset area threshold, and the pressure data is greater than a preset pressure threshold within a preset confidence interval, then a grasping event is determined to have occurred; or, if the pressure data is greater than a preset pressure threshold within a preset confidence interval, the temperature data is greater than a preset temperature threshold, and the time during which the temperature data is greater than the preset temperature threshold is within a preset time range, then a grasping event is determined to have occurred; or, if the area data is greater than a preset area threshold, the pressure data is greater than a preset pressure threshold within a preset confidence interval, the temperature data is greater than a preset temperature threshold, and the time during which the temperature data is greater than the preset temperature threshold is within a preset time range, then a grasping event is determined to have occurred; in this regard, the conditions for the occurrence of a grasping event can be designed according to actual needs, and this application will not list them one by one here. Preferably, the preset area threshold is set to 70% of the outer surface area of ​​the shell, the preset confidence interval is set to 95%, the preset pressure threshold is set to 0.02 Pa, the preset temperature threshold is set to the surface temperature of the palm, and the preset time range is set to 0 to 1s.

[0021] As one example, see Figure 1A second sensor cluster 160 is provided on the outer surface of the shell. The second sensor cluster 160 is composed of a plurality of second sensors distributed at different positions. Each second sensor in the second sensor cluster 160 is embedded inward from the outer surface of the shell. The purpose is to ensure the smoothness of the outer surface of the shell and avoid a scratchy feeling when the user holds the aerosol generating device. The second sensor cluster 160 can use its own plurality of second sensors to collect elbow motion data in real time and transmit the collected elbow motion data to the second feedback unit 142 within the single-chip microcomputer 140. In some implementations of this embodiment, the second sensor cluster 160 includes at least two second sensors, one of which is an acceleration sensor and the other is a gyroscope. Based on this, when the user holds the aerosol generating device and raises his hand, not only the acceleration of the user's elbow can be obtained by the acceleration sensor, but also the pitch angle of the user's elbow can be obtained by the gyroscope. In other words, the elbow motion data of the present application includes at least acceleration data and pitch angle data of the user's elbow. In addition, it should be noted that the second sensor in the second sensor cluster 160 is not limited to conventional sensors such as accelerometers and gyroscopes. Doppler microwave sensors can also be used. In this way, the accuracy of motion capture and posture recognition can be improved through the inherent characteristics of Doppler microwave sensors.

[0022] Furthermore, before taking a puff, the user will inevitably grasp the aerosol generating device and raise their hand. During this process, their elbow will inevitably move. The user's purpose for this pre-puff hand-raising movement is to move the aerosol generating device to their lips for inhalation, and moving the device to the lips takes a certain amount of time. In other words, when the user holds the aerosol generating device and raises their hand, their elbow must conform to certain motion patterns. For example, the elbow's acceleration and pitch angle cannot be too small, and the time it takes to move the aerosol generating device cannot be too short. In view of this, the specific process for the control unit 143 to determine whether a hand-raising event has occurred based on the elbow motion data is as follows: determining whether at least one of the acceleration data and pitch angle data is greater than a corresponding preset threshold value within a preset time period; if so, determining that a hand-raising event has occurred. For example, if the acceleration data enters the preset acceleration range within the preset time, then it is determined that a hand-raising event has occurred; or, if the pitch angle data exceeds the preset pitch angle threshold within the preset time, then it is determined that a hand-raising event has occurred; or, if the acceleration data enters the preset acceleration range within the preset time and the pitch angle data exceeds the preset pitch angle threshold within the preset time, then it is determined that a hand-raising event has occurred; in this regard, the conditions for the hand-raising event to occur can be designed according to actual needs, and this application will not list them one by one here. Preferably, the preset time is set to 0 to 5s, and the preset acceleration range is set to 0.9 to 2m / s 2 , set the preset pitch angle threshold to a 90° offset.

[0023] Through the above two embodiments, it can be seen that the control unit 143 of the present application obtains multimodal sensing information, namely palm contact data (area data, pressure data, and temperature data of the portion of the outer surface of the shell covered by the user's palm) and elbow motion data (acceleration data and pitch angle data of the user's elbow), and by fusing the multimodal sensing information, it is determined whether the user has grasped the aerosol generating device before inhalation, and whether the user has raised their hand to hold the aerosol generating device, and finally outputs the corresponding microwave generation instruction to the microwave generation circuit 110, and outputs the corresponding power amplification instruction to the power amplification circuit 120. In other words, the control unit 143 of the present application is based on multimodal fusion technology when working, so the control unit 143 can realize its own functions through certain multimodal fusion models, such as multi-Bayesian estimation models, artificial neural network models, etc.

[0024] As one embodiment, when the control unit 143 determines that a grabbing event and a hand-raising event occur before suction, it outputs a first power amplification instruction to the power amplifier circuit 120, and the power amplifier circuit 120 can respond to the first power amplification instruction and enter a conduction state allowing signal transmission, and at the same time adjust its own power amplification level to level one, so as to power amplify the transmitted initial microwave signal at the level one power amplification level to obtain a first target microwave signal. In this application, the power of the target microwave signal is positively correlated with the power amplification level of the power amplifier circuit 120, that is, the higher the power amplification level of the power amplifier circuit 120, the greater the power of the target microwave signal. It is understood that the power amplification instruction output by the control unit 143 is not only used to turn on the power amplifier circuit 120, but also to instruct the power amplifier circuit 120 to adjust its own power amplification level, that is, to adjust the power of the target microwave signal output by the power amplifier circuit 120. The greater the power of the target microwave signal, the shorter the time it takes to atomize the aerosol when heating the aerosol generator. Since the heating of the aerosol generator by the control unit 143 when determining a grab event and a hand-lift event is pre-heating before the user takes a puff, the power of the target microwave signal output by the power amplifier circuit 120 at this time should not be too high (for example, it should be lower than the maximum input power of the microwave radiator). This is why the present application only adjusts the power amplification level of the power amplifier circuit 120 to the lowest level when the control unit 143 determines a grab event or a hand-lift event before taking a puff. Preferably, in the present application, the maximum input power of the microwave radiator is set to 15 to 40W.

[0025] Furthermore, when preheating the aerosol generator before inhalation, the power amplification level of the power amplifier circuit 120 is only the lowest level, that is, the power of the first target microwave signal output by the power amplifier circuit 120 is relatively low. If the aerosol generator is heated with such a relatively low power target microwave signal, the time for the aerosol generator to be heated and atomized into aerosol is relatively long. Moreover, when the aerosol generator is heated with such a relatively low power target microwave signal, the user has already held the aerosol generating device and raised his hand before inhaling, which means that the user will perform an inhalation action in a relatively short period of time. In view of this, in order to shorten the time for the aerosol generator to be heated and atomized into aerosol when the user inhales, the present application will subsequently increase the power amplification level of the power amplifier circuit 120 when the user inhales, that is, increase the power of the target microwave signal output by the power amplifier circuit 120, so that the aerosol generator can be quickly atomized into aerosol for the user to inhale when the user inhales, thereby ensuring the user's usage experience.

[0026] Typically, an electronic atomization device has a nozzle connected to the interior of the housing. The user can hold the nozzle with his lips and inhale the aerosol generated by the heated aerosol generator. Based on this, the lip contact data generated when the user's lips come into contact with the outer surface of the nozzle can be used to determine whether the user is currently or about to perform a puffing action, thereby finding the right time to increase the power amplification level of the power amplifier circuit 120. In view of this, Figure 2This is a second structural block diagram of a microwave control system. In this application, a third feedback unit 144 is provided in the single-chip microcomputer 140. During the actual heating control process, the third feedback unit 144 can obtain lip contact data between the user's lips and the outer surface of the mouthpiece. The control unit 143 can determine whether the user has taken a puff on the aerosol generating device based on the lip contact data. When a puff event is determined to have occurred, it outputs a second power amplification instruction. The power amplifier circuit 120 can respond to the second power amplification instruction and adjust its power amplification level from level 1 to level 2, thereby amplifying the initial microwave signal at the level 2 power amplification level to produce a second target microwave signal. It can be understood that because the second target microwave signal is obtained at the level 2 power amplification level, while the first target microwave signal is only obtained at the level 1 power amplification level, the power of the second target microwave signal is greater than that of the first target microwave signal. Therefore, adjusting the power amplification level of the power amplifier circuit 120 from level 1 to level 2 ensures that the aerosol generator can quickly generate aerosol for the user to inhale when the user takes a puff, thereby ensuring a better user experience. Preferably, the power of the first target microwave signal is ½ of the maximum input power of the microwave radiator, while the power of the second target microwave signal is the maximum input power of the microwave radiator. Furthermore, it should be noted that the power amplification levels of the power amplifier circuit 120 are not limited to one or two levels, but may include more or higher levels, such as three or four levels. The specific design of the power amplification levels of the power amplifier circuit 120 can be determined based on actual needs.

[0027] In some implementations of this embodiment, see Figure 2A third sensor cluster 170 is provided on the outer surface of the nozzle. The third sensor cluster 170 is composed of at least one third sensor. When the third sensor cluster 170 includes multiple third sensors, the multiple third sensors are distributed at different positions on the nozzle. Each third sensor in the third sensor cluster 170 is embedded inward from the outer surface of the nozzle. The purpose is to ensure the smoothness of the outer surface of the nozzle and avoid a scratchy feeling when the user holds the nozzle with his lips. The third sensor cluster 170 can collect lip contact data in real time by relying on its own multiple third sensors, and transmit the collected lip contact data to the third feedback unit 144 in the single-chip microcomputer 140. As one of the implementation methods, the third sensor adopts a pressure sensor. When the user holds the mouthpiece with his lips, the pressure sensor will inevitably detect pressure, and the detected pressure should be greater than a certain value. That is to say, the lip contact data at least includes the pressure data between the user's lips and the outer surface of the mouthpiece, and the third feedback unit 144 in the single-chip microcomputer 140 can transmit this pressure data to the control unit 143. The control unit 143 can compare this pressure data with a preset pressure value. When this pressure data is greater than the preset pressure value, it can be considered that the user has held the mouthpiece with his lips and is about to inhale. At this time, the control unit 143 will output a second power amplification instruction to the power amplifier circuit 120 to instruct the power amplifier circuit 120 to adjust its own power amplification level from level one to level two, thereby shortening the time for the aerosol generator to atomize out aerosol due to heat when the user inhales.

[0028] In some implementations of this embodiment, Figure 3 A third structural block diagram of a microwave control system is shown. The power amplifier circuit 120 includes a plurality of power amplifiers, and the connection form between the plurality of power amplifiers is adjustable. The present application can change the power amplification level of the power amplifier circuit 120 by adjusting the connection form between the plurality of power amplifiers, that is, change the power of the target microwave signal output by the power amplifier circuit 120. For example, the number of power amplifiers connected together in the power amplifier circuit 120 is adjusted to change the power amplification level of the power amplifier circuit 120. That is to say, when the number of power amplifiers in the power amplifier circuit 120 used to connect the microwave generating circuit 110 and the microwave output circuit 130 is different, the power amplification level of the power amplifier circuit 120 is also different.

[0029] As one of the implementation methods, see Figure 3The power amplifier circuit 120 includes a first power amplifier AM1, a second power amplifier AM2, a third power amplifier AM3 and a fourth power amplifier AM4. The input end of the first power amplifier AM1 is connected to the microwave generating circuit 110, and the output end is connected to the input end of the second power amplifier AM2. The input ends of the third power amplifier AM3 and the fourth power amplifier AM4 are connected in parallel and then connected to the output end of the second power amplifier AM2. The output ends of the third power amplifier AM3 and the fourth power amplifier AM4 are connected in parallel and then connected to the microwave output circuit 130. In the first power amplification level, the first power amplifier AM1, the second power amplifier AM2 and the third power amplifier AM3 are connected, that is, the power amplifier circuit 120 is used to connect the microwave generating circuit 110. The number of power amplifiers in the power amplifier circuit 10 and the microwave output circuit 130 is three, namely the first power amplifier AM1, the second power amplifier AM2, and the third power amplifier AM3. The power amplifier circuit 120 outputs a first target microwave signal with a relatively low power. In the second power amplification level, the first power amplifier AM1, the second power amplifier AM2, the third power amplifier AM3, and the fourth power amplifier AM4 are connected. That is, the number of power amplifiers in the power amplifier circuit 120 used to connect the microwave generating circuit 110 and the microwave output circuit 130 is four, namely the first power amplifier AM1, the second power amplifier AM2, the third power amplifier AM3, and the fourth power amplifier AM4. The power amplifier circuit 120 outputs a second target microwave signal with a relatively high power. Furthermore, Figure 4 is a power diagram of the target microwave signal in different control stages, wherein the second stage corresponds to the power of the first target microwave signal, the third stage corresponds to the power of the second target microwave signal, and the first stage corresponds to the situation where the user holds the aerosol generating device and raises his hand before inhalation occurs. At this time, the microwave generating circuit 110 does not generate an initial microwave signal, and the power amplifying circuit 120 does not output the target microwave signal. Therefore, the power of the target microwave signal in this stage is zero.

[0030] As one example, when the aerosol generator is heated, high-frequency electromagnetic leakage is easily generated on the microwave radiator and / or the aerosol generator. If the human body is exposed to the electromagnetic environment for a long time, it will cause serious damage to the human body. In other words, it is very necessary to monitor the electromagnetic leakage on the microwave radiator and / or the aerosol generator. In view of this, Figure 5This is the fourth structural block diagram of a microwave control system. In addition to the structures listed above, the microwave control system also includes at least one electromagnetic monitoring antenna 190 and a power supply 180 for powering the microwave control system. The electromagnetic monitoring antenna 190 is disposed within the housing and is located near the microwave radiator and / or aerosol generator. The power supply 180 provides the electrical energy required for the various components of the microwave control system (such as the microwave generating circuit 110, the power amplifier circuit 120, the microwave output circuit 130, and the single-chip microcomputer 140). An electromagnetic monitoring unit 145 is also provided within the single-chip microcomputer 140. During the actual heating control process, the electromagnetic monitoring antenna 190 absorbs electromagnetic signals leaked from the microwave radiator and / or aerosol generator and outputs the absorbed power generated by the absorbed electromagnetic signals. Based on the absorbed power, the electromagnetic monitoring unit 145 determines whether there is an electromagnetic exposure risk and, if so, sends a power-off command to the power supply 180, instructing it to shut down. It is understandable that during the process of heating the aerosol generator, there is electromagnetic leakage on the microwave radiator and / or the aerosol generator, and the leaked electromagnetic signal can be absorbed by the electromagnetic monitoring antenna 190 and generate absorption power accordingly. The present application can determine whether there is an electromagnetic exposure risk based on the absorption power, and control the power supply 180 to shut down when it is determined that there is an electromagnetic exposure risk, thereby avoiding long-term exposure of the user to the electromagnetic environment and causing damage to the user's body.

[0031] In some implementations of this embodiment, the specific process of the electromagnetic monitoring unit 145 determining whether there is an electromagnetic exposure risk based on the absorbed power is as follows: predicting the power loss after the electromagnetic signal is radiated to the outside; predicting the average electric field strength after the electromagnetic signal is radiated to the outside based on the absorbed power and the power loss; predicting the specific absorption rate of the electromagnetic signal relative to the human body after it is radiated to the outside based on the average electric field strength; determining whether the specific absorption rate meets the corresponding safety standards; if the specific absorption rate does not meet the safety standards, it is determined that there is an electromagnetic exposure risk. As one implementation, the prediction formula for the specific absorption rate is SAR=(σ|E 2|) / ρ, σ is the human body conductivity (generally, the range of human body conductivity is 0.5~2S / m), ρ is the human tissue density, E is the average electric field strength, and SAR is the specific absorption rate. As one implementation method, the power loss prediction formula is L=32.44+20lg(d)+20lg(f), where L is the power loss, d is the distance the electromagnetic signal is radiated to the outside, and f is the frequency of the electromagnetic signal. In addition, it should be noted that there are two safety standards for specific absorption rate in the related art, one of which is the US standard (i.e., 1g of biological tissue does not exceed 1.6W / kg) and the other is the European standard (i.e., 10g of biological tissue does not exceed 2W / kg). However, this application does not adopt either of these two standards, but sets the safety standard for specific absorption rate to less than or equal to 1.2~1.4W / kg. That is, when the electromagnetic monitoring unit 145 determines that the predicted specific absorption rate exceeds 1.2~1.4W / kg, the power supply 180 can be controlled to be turned off. It should also be noted that the electromagnetic monitoring unit 145 can be connected to external smart terminals such as mobile phones, smart wearable devices, tablets and laptops through wired or wireless means, and send various data detected or predicted during the electromagnetic monitoring process (such as absorption power, power loss, average electric field strength, specific absorption rate, etc.) to the smart terminal, and the smart terminal can visually display the data it receives to the user, so that the user can more intuitively understand the electromagnetic leakage of the aerosol generating device.

[0032] It is understandable that in the process of the electromagnetic monitoring unit 145 judging whether there is an electromagnetic exposure risk based on the absorbed power, the data involved, such as power loss, average electric field strength, specific absorption rate, etc., are all predicted and estimated, rather than calculated accurate data. In other words, the electromagnetic monitoring unit 145 can estimate the electromagnetic leakage of the aerosol generating device through certain prediction and estimation models, such as the Kalman filter model and its variations, machine learning models, etc., to predict these data. Furthermore, Figure 6It is a power estimation diagram of the leaked electromagnetic signal radiated to the outside. Assuming that there are four electromagnetic monitoring antennas 190, during a heating process of the aerosol generator, the true trajectory represents the actual power of the electromagnetic signal leaked from the microwave radiator and / or the aerosol generator at each electromagnetic monitoring antenna 190, and the observed sample represents the absorbed power output by the port of each electromagnetic monitoring antenna 190 due to the absorption of the corresponding electromagnetic signal. The estimated trajectory represents the power of the leaked electromagnetic signal radiated to the outside, which is predicted and estimated after the observation sample (i.e., the absorbed power) is processed by Kalman filtering. In addition, it should be noted that the electromagnetic monitoring unit 145 of the present application can not only predict and estimate the electromagnetic leakage of the aerosol generating device, but also predict and estimate the electromagnetic compatibility of the aerosol generating device, that is, the electromagnetic monitoring unit 145 can also predict and estimate the degree of interference of the leaked electromagnetic signal on each structure in the aerosol generating device based on the absorbed power, and use this to evaluate the working condition of the aerosol generating device. Even when any structure in the aerosol generating device cannot work stably due to interference from the leaked electromagnetic signal, the power supply 180 can be directly controlled to shut down, thereby avoiding damage to the various structures in the aerosol generating device due to electromagnetic interference.

[0033] As one embodiment, the microwave generating circuit 110 generates a low-power microwave signal (with a power of 5 to 10 dBm) while generating the initial microwave signal. At this time, the human body (i.e., the user) is used as an antenna, and the low-power microwave signal will be absorbed by the human body, which can be equivalent to a near-field parallel load. That is, the human body will perform frequency deviation processing on the absorbed low-power microwave signal to obtain a frequency-deviant microwave signal. The obtained frequency-deviant microwave signal is sequentially transmitted through the user's palm, the first sensor cluster 150 (the first sensor of which needs to be a microwave sensor) and the first feedback unit 141 to the control unit 143. The control unit 143 can mix the palm contact data, elbow movement data and frequency-deviant microwave signal received by itself to obtain a mixed signal, and transmit the mixed signal to an external smart terminal via wired or wireless means. The external smart terminal can analyze and process the mixed signal received by itself, thereby achieving the effect of classifying and judging the user's use of the aerosol generating device. Furthermore, the loop of the low-power microwave signal is equivalent to the LC1 oscillation circuit, and the human body (i.e., the user) is used as the equivalent capacitor C2 in parallel to obtain different resonant frequencies. Then, the amplitude (-10 to -30 dB) and phase information (-180° to 180°) at different resonant frequencies are input as characteristic parameters into the control unit 143, so as to serve as the basis for the control unit 143 to output the mixing information. The frequency change of the low-power microwave signal when it is transmitted in the loop satisfies the formula f r represents the frequency of the low-power microwave signal, and L represents the inductance of the loop.

[0034] The above embodiments are only preferred implementations of the present application and are not the only limitations on the relevant contents of the microwave control system. In this regard, those skilled in the art can flexibly set them according to the actual application scenarios based on the above embodiments. It can be understood that through the implementation of the above embodiments of the present application, the single-chip microcomputer 140 can obtain the palm contact data between the user's palm and the outer surface of the shell of the aerosol generating device, and the elbow movement data of the user's elbow during the movement process, and judge whether the user has grasped the aerosol generating device before inhalation based on the palm contact data, and judge whether the user has raised his hand to hold the aerosol generating device before inhalation based on the elbow movement data. Once the grasping event and the hand-raising event before inhalation are determined to have occurred, the single-chip microcomputer 140 will send a microwave generation instruction to the microwave generating circuit 110 to instruct the microwave generating circuit 110 to generate an initial microwave signal, and send a power amplification instruction to the power amplifier circuit 120 to instruct the power amplifier circuit 120 to enter a conduction state allowing signal transmission and amplify the power of the initial microwave signal to obtain a target microwave signal. Finally, the microwave output circuit 130 outputs the target microwave signal to the microwave radiator, so that the microwave radiator radiates the target microwave signal to the aerosol generator to pre-heat the aerosol generator before inhalation. That is to say, when the present application determines based on the palm contact data and elbow movement data that the user has grasped the aerosol generating device and raised his hand, it can be assumed that the user will take a puff in a short period of time thereafter. Then, before the user takes a puff (that is, in the process of the user holding the aerosol generating device and raising his hand), the present application will control the microwave generating circuit 110 to generate an initial microwave signal, and control the power amplifier circuit 120 to enter a conductive state allowing signal transmission, so as to use the power amplifier circuit 120 to amplify the power of the transmitted initial microwave signal and obtain the target microwave signal accordingly. The obtained target microwave signal will be output to the microwave radiator by the power amplifier circuit 120, thereby realizing preheating of the aerosol generator before the user takes a puff. In this way, the instantaneous heating phenomenon of the aerosol generator when the user takes a puff is avoided in the traditional scheme (that is, the temperature of the aerosol generator is instantaneously increased to be able to atomize the aerosol, or the electric power used to heat the aerosol generator is instantaneously increased to be able to atomize the aerosol), thereby improving the service life of the electronic atomization device.

[0035] It should be noted that the present application is described in a progressive manner in the several embodiments shown above, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. It should also be noted that in the text description of the present application, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is such an actual relationship or order between these entities or operations. Further, the terms "include", "comprise" or any other corresponding variants are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only these elements, but also other elements not explicitly listed, or elements inherent to such a process, method, article or device; and, in the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0036] Furthermore, by implementing the several embodiments described above, those skilled in the art can implement or use the present application. Various modifications to the several embodiments described above will be readily apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments not shown without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the several embodiments described above, but rather is intended to conform to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A microwave control system for an aerosol generating device, the aerosol generating device comprising a housing, a microwave radiator and an aerosol generator disposed within the housing, the aerosol generator being disposed within the microwave radiator, wherein: The microwave control system is disposed in the housing and includes: a first feedback unit, configured to obtain palm contact data between the palm and the outer surface of the housing; a second feedback unit, for obtaining elbow motion data during the elbow movement process; a control unit configured to: determine, based on the palm contact data, whether a grabbing event of the aerosol generating device occurs before puffing; and determine, based on the elbow movement data, whether a hand-raising event of holding the aerosol generating device before puffing occurs; and output a microwave generation instruction and a power amplification instruction if the grabbing event and the hand-raising event occur; a microwave generating circuit, configured to respond to the microwave generating instruction to output an initial microwave signal; a power amplification circuit, configured to respond to the power amplification instruction to enter a conduction state allowing signal transmission, and amplify the power of the initial microwave signal to obtain a target microwave signal; The microwave output circuit is used to output the target microwave signal to the microwave radiator, so that the microwave radiator radiates the target microwave signal to the aerosol generator to preheat the aerosol generator before inhalation.

2. The microwave control system according to claim 1, characterized in that: The palm contact data includes area data, pressure data and temperature data of the part of the outer surface of the shell covered by the palm. When judging whether the grabbing event occurs, the control unit is specifically used to determine that the grabbing event has occurred when at least two of the area data, the pressure data and the temperature data are greater than their respective preset thresholds and the time greater than the preset thresholds is within a preset time range.

3. The microwave control system according to claim 1, characterized in that: The elbow motion data includes acceleration data and pitch angle data of the elbow during the movement. When judging whether the hand-raising event occurs, the control unit is specifically used to determine that the hand-raising event has occurred when at least one of the acceleration data and the pitch angle data is greater than the corresponding preset threshold within a preset time length.

4. The microwave control system according to claim 1, characterized in that: The control unit outputs a first power amplification instruction when determining that the grabbing event and the hand-raising event occur. The power amplification circuit is specifically used to power amplify the initial microwave signal in response to the first power amplification instruction to obtain a first target microwave signal.

5. The microwave control system according to claim 4, characterized in that: The shell is provided with a nozzle connected to the interior of the shell, and the microwave control system further includes: a third feedback unit for acquiring lip contact data between the lips and the outer surface of the nozzle; The control unit is further configured to: determine whether a puffing event has occurred on the aerosol generating device based on the lip contact data; and output a second power amplification instruction if the puffing event has occurred; The power amplification circuit is further used to: in response to the second power amplification instruction, perform power amplification on the initial microwave signal to obtain a second target microwave signal; wherein the power of the second target microwave signal is greater than the power of the first target microwave signal.

6. The microwave control system according to claim 5, characterized in that: The power amplification circuit includes a plurality of power amplifiers. When the number of the power amplifiers used to connect the microwave generating circuit and the microwave output circuit is different, the target microwave signal obtained by the power amplification circuit for the initial microwave signal is different.

7. The microwave control system according to claim 6, characterized in that: The power amplifier circuit includes a first power amplifier, a second power amplifier, a third power amplifier and a fourth power amplifier. The input end of the first power amplifier is connected to the microwave generating circuit, and the output end is connected to the input end of the second power amplifier. The third power amplifier is connected in parallel with the input end of the fourth power amplifier and then connected to the output end of the second power amplifier. The third power amplifier is connected in parallel with the output end of the fourth power amplifier and then connected to the microwave output circuit. When the first power amplifier, the second power amplifier and the third power amplifier are connected, the power amplifier circuit amplifies the power of the initial microwave signal to obtain the first target microwave signal. When the first power amplifier, the second power amplifier, the third power amplifier and the fourth power amplifier are connected, the power amplifier circuit amplifies the power of the initial microwave signal to obtain the second target microwave signal.

8. The microwave control system according to claim 1, characterized in that: Also includes: A power supply, used to supply power to the microwave control system; at least one electromagnetic monitoring antenna, disposed near the microwave radiator and / or the aerosol generator, for absorbing electromagnetic signals leaked from the microwave radiator and / or the aerosol generator and outputting absorbed power generated by absorbing the electromagnetic signals; The electromagnetic monitoring unit is used to: determine whether there is an electromagnetic exposure risk based on the absorbed power; if the electromagnetic exposure risk exists, send a power-off instruction to the power supply; wherein the power-off instruction is used to instruct the power supply to shut down.

9. The microwave control system according to claim 8, characterized in that: When determining whether there is the electromagnetic exposure risk, the electromagnetic monitoring unit is specifically used to: predict the power loss after the electromagnetic signal is radiated to the outside; predict the average electric field strength after the electromagnetic signal is radiated to the outside based on the absorbed power and the power loss; Predict the specific absorption rate of the electromagnetic signal relative to the human body after being radiated to the outside based on the average electric field strength; determine whether the specific absorption rate meets the corresponding safety standards; if the specific absorption rate does not meet the safety standards, determine that the electromagnetic exposure risk exists.

10. The microwave control system according to claim 9, characterized in that: The prediction formula for the power loss is L=32.44+20lg(d)+20lg(f), where L represents the power loss, d represents the distance the electromagnetic signal is radiated to the outside, and f represents the frequency of the electromagnetic signal.

11. The microwave control system according to claim 9, characterized in that: The prediction formula of the specific absorption rate is SAR=(σ|E 2 |) / ρ, where σ represents human body conductivity, ρ represents human tissue density, E represents the average electric field strength, and SAR represents the specific absorption rate.

12. An electronic atomization device, comprising an aerosol generating device, the aerosol generating device comprising a housing, a microwave radiator and an aerosol generator disposed within the housing, the aerosol generator being disposed within the microwave radiator, characterized in that: The electronic atomization device further comprises a microwave control system as described in any one of claims 1 to 11, wherein the microwave control system is disposed in the shell.

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