WO2023241173A1

WO2023241173A1 - Aerosol generating device and control circuit thereof

Info

Publication number: WO2023241173A1
Application number: PCT/CN2023/085519
Authority: WO
Inventors: 夏旭敏; 方伟明
Original assignee: 海南摩尔兄弟科技有限公司
Priority date: 2022-06-16
Filing date: 2023-03-31
Publication date: 2023-12-21
Also published as: CN115119984A

Abstract

An aerosol generating device and a control circuit thereof. The aerosol generating device (1) comprises an atomizer interface and an atomizer (200) removably connected to the atomizer interface. The control circuit comprises: a pull-up module (10) connected to the atomizer interface and configured to provide a detection voltage that varies with a state in which the atomizer interface is connected to the atomizer (200) and a state in which the atomizer interface is not connected to the atomizer (200); a reference module (30) configured to provide a reference voltage; a comparison module (50) configured to output a first interrupt signal when the detection voltage is greater than the reference voltage, and output a second interrupt signal when the detection voltage is less than the reference voltage; and a control module (70) configured to determine that the atomizer (200) is removed from the atomizer interface when the first interrupt signal is received, and determine that the atomizer (200) is connected to the atomizer interface when the second interrupt signal is received.

Description

Aerosol generating device and its control circuit

Cross-references to related applications

This application claims the right of priority to Chinese Patent Application No. 2022106795651 filed with the State Intellectual Property Office of China on June 16, 2022. The entire disclosure of this Chinese patent application is incorporated herein by reference for all purposes.

Technical field

This application relates to the field of atomization technology, and in particular to an aerosol generating device and its control circuit.

Background technique

The aerosol generating device mainly consists of an atomizer and a battery pole. An atomizer generally includes a liquid storage chamber and an atomization component. The liquid storage chamber is used to store the aerosol-generating substrate. The atomization component is used to heat and atomize the aerosol-generating substrate. The battery rod is used to provide energy to the atomizer. . The connection between the atomizer and the battery rod is generally pluggable. During use of the aerosol generating device, it is often necessary to detect the plug-in and unplug status of the atomizer. However, the plug-in and unplug detection method in traditional technology has a high misjudgment rate. high problem.

Contents of the invention

This application provides a control circuit and an aerosol generating device that can improve the accuracy of plugging and unplugging detection.

In a first aspect, the present application provides a control circuit for an aerosol generating device. The aerosol generating device includes an atomizer interface and an atomizer removably connected to the atomizer interface. The control circuit includes: a pull-up a module connected to the atomizer interface and configured to provide a detection voltage that changes with a state in which the atomizer interface is connected to the atomizer and a state in which the atomizer interface is not connected to the atomizer; a reference module configured to provide a reference voltage ; The comparison module is configured to output a first interrupt signal when the detection voltage is greater than the reference voltage, and to output a second interrupt signal when the detection voltage is less than the reference voltage; the control module is configured to determine when receiving the first interrupt signal. The atomizer is removed from the atomizer interface, and when the second interrupt signal is received, it is determined that the atomizer is connected to the atomizer interface.

In one embodiment, the working state of the comparison module includes a first comparison state and a second comparison state that are switchable to each other. The comparison module is configured to: perform the operation of outputting the first interrupt signal when the detection voltage is greater than the reference voltage only when the comparison module is in the first comparison state; perform the operation of outputting the first interrupt signal when the detection voltage is less than the reference voltage only when the comparison module is in the second comparison state. The operation of outputting the second interrupt signal. The control module is configured to: determine that the atomizer is removed from the atomizer interface when receiving the first interrupt signal, and switch the comparison module to the second comparison state; determine that the atomizer is connected when receiving the second interrupt signal to the atomizer interface, and switch the comparison module to the first comparison state.

In one embodiment, the comparison module includes: a first comparator configured to output a first interrupt signal when the detection voltage is greater than the reference voltage; a second comparator configured to output a second interrupt signal when the detection voltage is less than the reference voltage. . The control module is also configured to: by turning on the first comparator and turning off the second comparator, the comparison module is placed in the first comparison state; and by turning off the first comparator and turning on the second comparator, the comparison module is placed in the first comparison state. 2. Comparison status.

In one embodiment, the comparison module includes a switching unit and a third comparator, the switching unit having a first conduction state and a second conduction state. The switch unit is configured to: when the switch unit is in the first conduction state, connect the detection voltage to the first input terminal of the third comparator, and connect the reference voltage to the second input terminal of the third comparator; When the switching unit is in the second conductive state, the reference voltage is connected to the first input terminal of the third comparator, and the detection voltage is connected to the second input terminal of the third comparator. The third comparator is configured to: output a first interrupt signal when the switch unit is in the first conduction state and the voltage of the first input terminal of the third comparator is greater than the voltage of the second input terminal; when the switch unit is in the second When the voltage of the first input terminal of the third comparator is greater than the voltage of the second input terminal, the second interrupt signal is output. The control module is further configured to: place the comparison module in the first comparison state by controlling the switch unit to be placed in the first conduction state; and place the comparison module in the second conduction state by controlling the switch unit to be placed in the second conduction state. Compare status.

In one embodiment, the switching unit includes a first switch and a second switch. The combined terminal of the first switch is connected to the detection voltage, the first branch terminal of the first switch is connected to the first input terminal of the third comparator, and the second branch terminal of the first switch is connected to the second input terminal of the third comparator. When the first switch is in the first conductive state, there is conduction between the combined end of the first switch and the first branch end of the first switch. When the first switch is in the second conductive state, the combined end of the first switch terminal and the second shunt terminal of the first switch. The combined end of the second switch is connected to the reference voltage, the first branch end of the second switch is connected to the first input end of the third comparator, and the second branch end of the second switch is connected to the second input of the third comparator. When the second switch is in the first conductive state, there is conduction between the combined end of the second switch and the second branch end of the second switch. When the second switch is in the second conductive state, the combined end of the second switch There is conduction between the terminal and the first shunt terminal of the second switch.

In one embodiment, the comparison module includes a fourth comparator, the fourth comparator is integrated in the control module, the working mode of the fourth comparator includes a first mode and a second mode, and the first input terminal of the fourth comparator is connected to The detection voltage is input, and the second input terminal of the fourth comparator is connected to the reference voltage. The fourth comparator is configured to: when the fourth comparator is in the first mode and the voltage of the first input terminal of the fourth comparator is greater than the voltage of the second input terminal of the fourth comparator, or when the fourth comparator is in the second mode And when the voltage of the first input terminal of the fourth comparator is less than the voltage of the second input terminal of the fourth comparator, an interrupt signal is output. The control module is configured to: when the fourth comparator is in the first mode, determine that the interrupt signal output by the fourth comparator is the first interrupt signal, and when the fourth comparator is in the second mode, determine that the interrupt signal output by the fourth comparator is the first interrupt signal. The interrupt signal is the second interrupt signal; the comparison module is placed in the first comparison state by placing the fourth comparator in the first mode, and is used to pass The comparison module is placed in the second comparison state by placing the fourth comparator in the second mode.

In one embodiment, the control circuit further includes a first amplification module, the first amplification module is connected in series between the pull-up module and the comparison module, and the first amplification module is configured to amplify the detection voltage.

In one embodiment, the control circuit further includes a second amplification module, the second amplification module is connected in series between the reference module and the comparison module, and the second amplification module is configured to amplify the reference voltage.

In one of the embodiments, the control module is further configured to: enter the sleep state after determining that the atomizer is removed from the atomizer interface and switch the comparison module to the second comparison state; and to determine that the atomizer is removed from the atomizer interface. Connect to the atomizer interface, switch the comparison module to the first comparison state and then enter the sleep state.

In one embodiment, the reference module includes a reference power supply, a first voltage dividing resistor and a second voltage dividing resistor. The reference power supply is grounded through the first voltage dividing resistor and the second voltage dividing resistor. The first voltage dividing resistor and the second voltage dividing resistor are grounded. The common terminal of the piezoresistor is used to output the reference voltage.

In one embodiment, the pull-up module includes a pull-up resistor, and the ratio of the resistance of the pull-up resistor to the preset minimum resistance is equal to the ratio of the resistance of the first voltage-dividing resistor to the resistance of the second voltage-dividing resistor, where , the preset minimum resistance value is the minimum resistance value when there is atomization matrix residue in the atomizer interface.

In one embodiment, the control circuit further includes a first switch module, a third voltage dividing resistor and a second switch module. The first switch module is configured to connect the heating power supply to the atomizer interface through the third voltage dividing resistor when it is turned on. The second switch module is configured to connect the heating power supply to the atomizer interface when it is turned on.

The control module is configured to: obtain the detection voltage by turning on the first switch module and disconnecting the second switch module; when the detection voltage matches the preset voltage, determine that the atomizer is connected to the atomizer interface; after determining After the atomizer is connected to the atomizer interface, if a suction signal is detected, the first switch module is disconnected and the second switch module is connected, so that the atomizer is heated under the power supply of the heating power supply.

In one of the embodiments, the control module is further configured to switch the comparison module to enter the first comparison state after the atomizer heating is completed.

In one embodiment, the reference voltage is less than the minimum residual voltage, which is the minimum detection voltage when the atomizer is removed from the atomizer interface and the atomization matrix remains in the atomizer interface.

In a second aspect, the present application also provides an aerosol generating device, including the control circuit described in the first aspect.

To carry out the foregoing and related purposes, one or more aspects of the present application include the features fully described below and particularly pointed out in the claims. Certain example aspects of the one or more aspects are set forth in detail in the following description and drawings. These aspects are indicative, however, of but a few of the various ways in which the principles described herein may be employed and the described aspects are intended to cover all such aspects and their equivalents.

Description of the drawings

In order to more clearly explain the technical solutions in the embodiments of the present application or the traditional technology, the drawings needed to be used in the description of the embodiments or the traditional technology will be briefly introduced below. Obviously, the drawings in the following description are only for the purpose of explaining the embodiments or the technical solutions of the traditional technology. For some embodiments of the application, those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of an aerosol generating device according to an embodiment of the present application;

Figure 2 is a structural block diagram of a control circuit according to an embodiment of the present application;

Figure 3 is a structural block diagram of a control circuit according to another embodiment of the present application;

Figure 4 is a structural block diagram of a control circuit with a switch unit according to an embodiment of the present application;

Figure 5 is a structural block diagram of a control circuit with a switch unit according to another embodiment of the present application;

Figure 6 is a structural block diagram of a control circuit according to another embodiment of the present application;

Figure 7 is a structural block diagram of a control circuit according to yet another embodiment of the present application;

Figure 8 is a circuit schematic diagram of a reference module according to an embodiment of the present application;

Figure 9 is a structural block diagram of a control circuit according to another embodiment of the present application;

Figure 10 is a circuit schematic diagram of a control circuit according to an embodiment of the present application.

Detailed ways

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the application are given in the accompanying drawings. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

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

It will be understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element.

Spatial relational terms such as "under", "under", "under", "under", "on", "above", etc., in This may be used to describe the relationship of one element or feature to other elements or features shown in the figures. It will be understood that the spatially relative terms encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if a device in the figure is turned over, it would be described as “below” or “beneath” or “beneath” other elements. An element or feature "below" would be oriented "above" another element or feature. Thus, the example terms "below" and "under" may include both upper and lower orientations. Additionally, devices Alternative orientations (eg, rotated 90 degrees or other orientations) may also be included and the spatial descriptors used herein interpreted accordingly.

It should be noted that when an element is said to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intervening element. In addition, "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

As used herein, the singular forms "a," "an," and "the" may include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the terms "comprising" or "having" and the like specify the presence of stated features, integers, steps, operations, components, parts or combinations thereof, but do not exclude the presence or addition of one or more Possibility of other features, integers, steps, operations, components, parts or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.

Figure 1 shows an aerosol generating device 1 according to one embodiment of the present application. The aerosol generating device 1 can be used to generate aerosols that can be smoked. In some embodiments, it can be in the shape of an elliptical column. It can include a battery rod 10 and be removably disposed on the battery rod 10 along the longitudinal direction of the battery rod 10 . The end of the atomizer 20 (the upper end of the battery rod 10 as shown in Figure 1). The atomizer 20 is used to receive a liquid substrate and heat the liquid substrate to atomize it to generate an aerosol. The battery rod 10 is used to power the atomizer 20 . It can be understood that the aerosol generating device 1 is not limited to an elliptical columnar shape, and may also be in a cylindrical shape, a square columnar shape, a flat columnar shape, or other other shapes.

Figure 2 shows a control circuit of the aerosol generating device 1 according to an embodiment of the present application. The aerosol generating device 1 includes an atomizer interface provided on the battery rod 100. The atomizer interface is used to removably connect the atomizer 200. The first end of the atomizer interface is connected to the energy supply module. The atomizer interface The second terminal is grounded. After the atomizer 200 is inserted into the atomizer interface, the energy supply module provides energy to the atomization component of the atomizer 200 through the first end of the atomizer interface (for example, by outputting a PWM signal to supply energy to the atomizer, by adjusting The relevant parameters of the PWM signal can control the power of the atomizer component), the energy supply module, the atomizer interface and the atomizer component installed in the atomizer 200 form a loop, so that the atomizer component can heat the atomizer 20 liquid matrix.

The control circuit includes a pull-up module 10 , a reference module 30 , a comparison module 50 and a control module 70 . The pull-up module 10 is connected to the atomizer interface, for example, between the first end of the atomizer interface and the pull-up power supply, and can provide a state where the atomizer interface is connected to the atomizer and the atomizer interface is not connected. to the detection voltage of the state change of the atomizer. Specifically, the resistance between the first end and the second end of the atomizer interface will be significantly different when the atomizer interface is connected to the atomizer 20 and when it is not connected to the atomizer 20. By pulling up The module 10 sets a voltage for the first end of the atomizer interface, so that the resistance change between the first end and the second end of the atomizer interface can be reflected by the voltage of the first end of the atomizer interface. pull up The module 10 is implemented based on a pull-up resistor, and the resistance of the pull-up resistor is set to a larger value to reduce the current output by the pull-up power supply when the atomizer interface is inserted into the atomizer 20, thereby achieving the purpose of saving power. It is worth mentioning that the pull-up power supply and the power supply in the energy supply module can be the same power supply, or they can be different. The voltage output by the energy supply module must meet the working requirements of the atomization component. Generally, the power supply in the energy supply module is battery power. There are no specific requirements for the output voltage of the pull-up power supply, and it is not limited to battery power. In order to achieve better power saving effect, you can choose to connect a node with a lower voltage in the aerosol generation device 1, such as the microprocessor in the control module 70 internal reference voltage within.

The comparison module 50 is configured to output a first interrupt signal when the detected voltage is greater than the reference voltage, or to output a second interrupt signal when the detected voltage is less than the reference voltage. That is, the first input end of the comparison module 50 can be connected to the first end of the atomizer interface to obtain the detection voltage, and the second input end of the comparison module 50 can be connected to the output end of the reference module 30 to obtain the reference output of the reference module 30 Voltage. Both the first interrupt signal and the second interrupt signal can wake up the control module 70 from the sleep state. The first interrupt signal is used to indicate to the control module 70 that the atomizer 20 has been removed from the atomizer interface, e.g. 20 has been unplugged from the atomizer interface, and the second interrupt signal is used to indicate to the control module 70 that the atomizer 20 has been connected to the atomizer interface, for example, the atomizer 20 has been inserted into the atomizer interface.

Since both the first interrupt signal and the second interrupt signal output by the comparison module 50 can wake up the control module 70, the control module 70 in this embodiment can enter the sleep state when there is no need to work. When changing, the comparison module 50 will wake up, so that the information related to the plug-in status will not be missed while ensuring the power saving effect. In addition, the high misjudgment rate in conventional technology is because the control module 70 generally determines that the plug-in/unplug state of the atomizer 20 changes when the level of the first end of the atomizer interface changes. For example, if the first end of the atomizer interface is at a high level, it is determined that the atomizer 20 is pulled out; if the first end of the atomizer interface is at a low level, it is determined that the atomizer 20 is inserted. However, since the threshold voltage for level judgment is difficult to adjust, in some cases, although the plug-in and unplug state changes, the level at the first end of the atomizer interface does not change. For example, when the atomizer 20 is pulled out normally, the resistance between the first end and the second end of the atomizer interface changes from the resistance value of the atomizer component (generally small, several ohms) to infinity, and the resistance of the atomizer interface changes to infinity. One end changes from low level to high level. However, if the liquid matrix remains in the atomizer interface when the atomizer 20 is pulled out, the liquid matrix is conductive, and the resistance between the first end and the second end of the atomizer interface is determined by the resistance value of the atomizer component (generally (smaller, several ohms) becomes the resistance value of the liquid matrix (the more liquid matrix, the smaller, the minimum can reach hundreds of ohms or thousands of ohms), which will cause that although the atomizer 20 is pulled out, the atomizer interface The resistance between the first end and the second end is still much smaller than the resistance of the pull-up module 10, and the level of the first end of the atomizer interface will not change, so the control module 70 often misjudges.

Considering this problem, although the level change may not occur at the first end of the atomizer interface, the detection voltage will still change, and the detection voltage when the atomizer 20 is inserted will be smaller than the atomizer 20 under various circumstances. Detection voltage when pulling out. Therefore, it can be distinguished whether the atomizer 20 is pulled out or inserted according to the size of the detection voltage, that is, the detection voltage is smaller than the reference voltage. When it indicates that the atomizer 20 is inserted, when the detection voltage is greater than the reference voltage, it indicates that the atomizer 20 is pulled out. By analyzing the voltage when the detection voltage does not rise significantly due to various influencing factors when the atomizer 20 is pulled out, a more accurate reference voltage can be determined. Since the reference voltage can be adjusted as needed, the above misjudgment can be avoided. problems to improve the accuracy of judgment.

The control module 70 is connected to the output end of the comparison module 50 and is configured to determine that the atomizer is pulled out when the first interrupt signal is received, or to determine that the atomizer is inserted when the second interrupt signal is received. It can be understood that the first interrupt signal is used to indicate the removal of the atomizer, and the second interrupt signal is used to indicate the insertion of the atomizer. The control module can accurately determine the current insertion and removal of the atomizer based on the output of the comparison module.

The control circuit in this embodiment is based on the fact that the resistance between the atomizer interfaces will change when the atomizer is plugged in and out. The pull-up module 10 provides a detection voltage that can reflect the change in resistance. The comparison module 50 uses the detection voltage and the reference The magnitude relationship between the voltages outputs a first interrupt signal or a second interrupt signal. The first interrupt signal indicates the removal of the atomizer, and the second interrupt signal indicates the insertion of the atomizer. Since the size of the reference voltage can be set by oneself, the reference voltage can be adjusted to achieve a more accurate distinction between plug-in and pull-out states, which greatly improves the accuracy of judging the plug-in and pull-out status and reduces the possibility of misjudgment.

In one embodiment, the working state of the comparison module 50 includes a first comparison state and a second comparison state. When the comparison module 50 is in the first comparison state, it is configured to output a first interrupt signal when the detection voltage is greater than the reference voltage. When the comparison module 50 is in the second comparison state, it is configured to output a second interrupt signal when the detection voltage is less than the reference voltage. Since the current microprocessor determines the arrival of an interrupt, it is generally based on the level of the level. For example, a certain port is generally in a low level state. When a high level is received at the port, the microprocessor is interrupted. When the first interrupt signal and the second interrupt signal are both high level, when the control module uses the same interrupt interface to receive the first interrupt signal and the second interrupt signal, the control module may have difficulty distinguishing whether the interrupt signal is the first interrupt signal or the second interrupt signal. 2 interrupt signals. At this time, the control module 70 can make a distinction based on the status of the comparison module 50 . A control terminal can be provided on the comparison module 50 , and the state switching of the comparison module 50 can be realized by changing the voltage of the control terminal. The control module 70 can also determine the state of the comparison module 50 according to the voltage of the control terminal of the comparison module 50 .

The control module 70 is also configured to determine that the atomizer 20 is unplugged and place the comparison module 50 in the second comparison state when receiving the first interrupt signal, and to determine that the atomizer 20 is inserted and compare the state when receiving the second interrupt signal. Module 50 is placed in a first comparison state. It can be understood that the comparison module 50 in the first comparison state is used to determine that the atomizer 20 is pulled out, and the control module 70 determines that the atomizer 20 is removed under the instruction of the first interrupt signal output by the comparison module 50 in the first comparison state. Pull out, at this time, the state of the comparison module 50 should be switched, and the comparison module 50 should be set from the first comparison state to the second comparison state, so that the comparison module 50 can be used to determine the insertion of the atomizer 20 . The comparison modules 50 in the two states are respectively used to determine an action of the atomizer 20. Therefore, the control module 70 also needs to switch the state of the comparison module 50 when determining that the atomizer 20 sends a change in the plugging and unplugging state.

In one embodiment, to address the problem of abnormal changes in detection voltage caused by atomized substrate, the reference voltage should be selected as Less than the minimum residual voltage. The minimum residual voltage is the minimum voltage at the first end of the atomizer interface when the atomizer 20 is pulled out and the atomization matrix remains in the atomizer interface. It can be understood that the greater the amount of atomization matrix remaining, the smaller the resistance between the first end and the second end of the atomizer interface, and the smaller the voltage at the first end of the atomizer interface. The space between the first and second ends of the atomizer interface is limited, so the resistance between the first and second ends of the atomizer interface due to the residual atomization matrix has a minimum value, and the minimum residual voltage is The voltage at the first end of the atomizer interface when the resistance is minimum. This minimum resistance value can be obtained by simulating atomized matrix residue and testing it. In addition, the resistance value of the pull-up module 10 should be much greater than the minimum value of the resistance. For example, assume that the minimum value of the resistor is 1kΩ, the resistance value of the pull-up module 10 is selected to be 100kΩ, and the pull-up power supply is 5V. Then the minimum residual voltage is about 50mV, and the reference voltage can be selected between 30 and 42mV.

In one of the embodiments, the control module 70 is further configured to enter the sleep state after determining that the atomizer 20 is unplugged and the comparison module 50 is placed in the second comparison state, and is configured to enter the sleep state after determining that the atomizer 20 is inserted and compare the The module 50 enters the sleep state after being placed in the first comparison state. It can be understood that in order to improve the power saving effect, the control module 70 can enter a sleep state when not working, and the first interrupt signal and the second interrupt signal can wake up the control module 70 to indicate the plug-in and unplug state of the atomizer 20 . The control module 70 can re-enter the sleep state after being awakened and learning the latest plug-in/unplug status of the atomizer 20 until it is awakened again.

In one embodiment, please refer to FIG. 3 , the comparison module 50 includes a first comparator 51 and a second comparator 53 . That is, in this embodiment, two comparators are used to realize the insertion and removal detection of the atomizer 20 respectively. The first comparator 51 is configured to output a first interrupt signal when the detection voltage is greater than the reference voltage. The second comparator 53 is configured to output a second interrupt signal when the detection voltage is smaller than the reference voltage. A comparator generally includes two input terminals. When the voltage of one input terminal is greater than the voltage of the other input terminal, it outputs a signal of one voltage, otherwise it outputs a signal of the other voltage. In some embodiments, both the first interrupt signal and the second interrupt signal are high level. When the voltage of the first input terminal of the first comparator 51 is greater than the voltage of the second input terminal of the first comparator 51, the first comparator 51 outputs a high level, otherwise it outputs a low level. When the voltage of the first input terminal of the second comparator 53 is less than the voltage of the second input terminal of the second comparator 53, the second comparator 53 outputs a high level, otherwise it outputs a low level. The connection method of the first comparator 51 and the second comparator 53 can be: the first input terminal of the first comparator 51 is connected to the first terminal of the atomizer interface (connected to the detection voltage), and the first input terminal of the first comparator 51 The two input terminals are connected to the output terminal of the reference module 30 (connected to the reference voltage), and the output terminal of the first comparator 51 is connected to the control module 70 . The first comparator 51 can output the first interrupt signal when the detection voltage is greater than the reference voltage. The first input end of the second comparator 53 is connected to the first end of the atomizer interface (connected to the detection voltage), and the second input end of the second comparator 53 is connected to the output end of the reference module 30 (connected to the reference voltage). The output end of the second comparator 53 is connected to the control module 70, and the second comparator 53 can output a second interrupt signal when the detected voltage is less than the reference voltage.

Based on the connection mode and function of the first comparator 51 and the second comparator 53, it can be seen that the first comparator 51 is used to detect When the atomizer 20 is pulled out, the second comparator 53 is used to detect the insertion of the atomizer 20. Only turning on one comparator at the same time can enable the comparison module 50 to have corresponding functions. Therefore, the control module 70 controls the state switching of the comparison module 50 by controlling the switches of the first comparator 51 and the second comparator 53 . Specifically, since the first comparator 51 is used to detect that the atomizer 20 is pulled out, and the comparison module 50 in the first comparison state is used to detect that the atomizer 20 is pulled out, the control module 70 controls the first comparator 51 is turned on and the second comparator 53 is turned off, the comparison module 50 can be placed in the first comparison state. Similarly, the comparison module 50 can be placed in the second comparison state by controlling the second comparator 53 to turn on and the first comparator 51 to turn off. Alternatively, the first comparator 51 and the second comparator 53 may be set independently from the control module 70 . However, the control module 70 generally includes a microprocessor, and the microprocessor generally integrates more than two comparators. Therefore, the first comparator 51 and the second comparator 53 can be comparators inside the microprocessor. It is also possible that one of them is integrated and the other is set independently. The integration method can simplify the structure of the control circuit and reduce circuit costs.

In the previous embodiment, two comparators are used, but one comparator can also be reused to achieve similar functions. In one embodiment, please refer to FIG. 4 , the comparison module 50 includes a switching unit 55 and a third comparator 57 . When the switch unit is in the first conduction state, it is used to connect the detection voltage to the first input terminal of the third comparator and connect the reference voltage to the second input terminal of the third comparator. The switch unit is in the second conduction state. When in the on state, it is used to connect the reference voltage to the first input terminal of the third comparator, and connect the detection voltage to the second input terminal of the third comparator. Figure 4 shows the optional connection method of this function, that is, the first end p ₁ of the switch unit 55 is connected to the first end of the atomizer interface, and the second end p ₂ of the switch unit 55 is connected to the output of the reference module 30 terminal, the third terminal p ₃ of the switch unit 55 is connected to the first input terminal of the third comparator 57 , and the fourth terminal p ₄ of the switch unit 55 is connected to the second input terminal of the third comparator 57 . When the switch unit 55 is in the first conductive state, the first terminal p ₁ and the third terminal p ₃ of the switch unit 55 are conductive, and the second terminal p ₂ and the fourth terminal p ₄ are conductive. When the unit 55 is in the second conductive state, the first terminal p ₁ and the fourth terminal p ₄ of the switch unit 55 are conductive, and the second terminal p ₂ and the third terminal p ₃ are conductive.

The third comparator 57 outputs an interrupt signal when the voltage of the first input terminal is greater than the voltage of the second input terminal. The control module 70 can control the conduction state of the switch unit 55 so that the third comparator 57 has different access relationships with the detection voltage and the reference voltage, so that when the control module 70 receives an interrupt signal, based on the switching state of the switch unit 55 The status can be used to determine whether the interrupt signal is the first interrupt signal or the second interrupt signal. When the switching unit 55 is in the first conductive state, the first input terminal of the third comparator 57 is connected to the detection voltage, and the second input terminal is connected to the reference voltage. Therefore, if the third comparator 57 outputs an interrupt signal at this time, This means that the detection voltage is greater than the reference voltage, and this interrupt signal is the first interrupt signal that reflects the removal of the atomizer. When the switch unit 55 is in the second conduction state, the first input terminal of the third comparator 57 is connected to the reference voltage, and the second input terminal is connected to the detection voltage. Therefore, if the third comparator 57 outputs an interrupt signal at this time, It means that the reference voltage is greater than the detection voltage, and the interrupt signal is the second interrupt signal that reflects the insertion of the atomizer. The comparison module is at 50 The first interrupt signal can be output only in the first comparison state, and the second interrupt signal can be output only in the second comparison state. Therefore, the control module 70 puts the comparison module 50 into the first comparison state by putting the switch unit 55 into the first conduction state, and puts the comparison module 50 into the second conduction state by putting the switch unit 55 into the second conduction state. Put into the second comparison state.

Taking the connection relationship in Figure 4 as an example, when the switch unit 55 is in the first conduction state, the first input terminal of the third comparator 57 is connected through the first terminal p ₁ and the third terminal p ₃ of the switch unit 55 The first end of the atomizer interface and the second input end of the third comparator 57 are connected to the output end of the reference module 30 through the second end p ₂ and the fourth end p ₄ of the switch unit 55 . At this time, the third comparator 57 outputs an interrupt signal when the detection voltage is greater than the reference voltage. After the control module 70 is awakened by the interrupt signal, it can be determined according to the state of the switch unit 55 that the third comparator 57 is feedbacking the atomizer at this time. 20 has been pulled out. Therefore, when the switching unit 55 is in the first conductive state, the interrupt signal output by the third comparator 57 is the first interrupt signal. The control module 70 puts the comparison module 50 into the first comparison state by putting the switch unit 55 into the first conduction state. Similarly, when the switch is in the second conductive state, the first input terminal of the third comparator 57 is connected to the output terminal of the reference module 30 through the second terminal p ₂ and the third terminal p ₃ of the switch unit 55 . The second input terminal of the comparator 57 is connected to the first terminal of the atomizer interface through the first terminal p ₁ and the fourth terminal p ₄ of the switch unit 55 . At this time, the third comparator 57 outputs an interrupt signal when the detection voltage is less than the reference voltage. After the control module 70 is awakened by the interrupt signal, it can be determined according to the state of the switch unit 55 that the third comparator 57 is feedbacking the atomizer at this time. 20 has been inserted. Therefore, when the switching unit 55 is in the second conductive state, the interrupt signal output by the third comparator 57 is the second interrupt signal. The control module 70 puts the comparison module 50 into the second comparison state by putting the switch unit 55 into the second conduction state. Optionally, the third comparator 57 can be a comparator integrated inside the microprocessor, or can be set independently.

In one embodiment, the function of the switch unit 55 can be implemented based on two controllable switches. Specifically, referring to FIG. 5 , the switch unit 55 includes a first switch (a switch located on the left side of the switch unit 55 in FIG. 5 ) and a second switch (a switch located on the right side of the switch unit 55 in FIG. 5 ). ). When the first switch and the second switch are in different conduction states, the combined end remains unchanged, and switching can occur between the branch ends. The combined end of the first switch is connected to the first end of the atomizer interface, the first branch end of the first switch is connected to the first input end of the third comparator 57 , and the second branch end of the first switch is connected to the third The second input terminal of comparator 57. When the first switch is in the first conductive state, there is conduction between the combined end and the first shunt end. When the first switch is in the second conductive state, there is conduction between the combiner end and the second shunt end. The combined end of the second switch is connected to the output end of the reference module 30 , the first branch end of the second switch is connected to the first input end of the third comparator 57 , and the second branch end of the second switch is connected to the third comparator. 57 second input. When the second switch is in the first conductive state, there is conduction between the combined end and the second branch end. When the second switch is in the second conductive state, there is conduction between the combined end and the first branch end. Based on this structure, when the switch unit 55 is in the first conductive state, the first input end of the third comparator 57 is connected to the first end of the atomizer interface through the first switch, and the second input end of the third comparator 57 The output of the reference module 30 is connected through the second switch. toggle switch When the unit 55 is in the second conduction state, the first input terminal of the third comparator 57 is connected to the output terminal of the reference module 30 through the second switch, and the second input terminal of the third comparator 57 is connected to the atomizer through the first switch. The first end of the interface.

In one of the embodiments, for a scenario where only one comparator is used, the above embodiment implements function multiplexing by switching the switch unit 55 . When the comparator is a comparator in a microprocessor, the switch unit 55 can be omitted. Specifically, the comparison module 50 includes a fourth comparator. The fourth comparator is integrated in the control module 70 . The working mode of the fourth comparator includes a first mode and a second mode. The first input end of the fourth comparator is connected to the mist. The first end of the comparator interface is connected to the detection voltage, and the second input end of the fourth comparator is connected to the output end of the reference module 30 to access the reference voltage. The comparator inside the microprocessor has two working modes, namely the first mode and the second mode. When the fourth comparator is in the first mode and the second mode, it will have different outputs when facing the same input. For example, when the fourth comparator is in the first mode, it outputs a high level when the voltage of the first input terminal is greater than the voltage of the second input terminal, and outputs a low level when the voltage of the first input terminal is less than the voltage of the second input terminal. When the fourth comparator is in the second mode, it outputs a low level when the voltage of the first input terminal is smaller than the voltage of the second input terminal, and outputs a high level when the voltage of the first input terminal is smaller than the voltage of the second input terminal. Assuming that the interrupt signals are all high level, by switching the mode of the fourth comparator, the fourth comparator can output interrupt signals without changing the access relationship between the fourth comparator and the reference voltage and detection voltage. . The control module 70 can determine whether the interrupt signal is the first interrupt signal or the second interrupt signal according to the working mode of the fourth comparator, and then determine whether the atomizer is pulled out or inserted. Specifically, the control module determines that the interrupt signal output by the fourth comparator is the first interrupt signal when it is in the first mode, and determines that the interrupt signal output by the fourth comparator when it is in the second mode is the second interrupt signal. Based on this, the control module 70 puts the comparison module into the first comparison state by putting the fourth comparator into the first mode, and puts the comparison module into the second comparison state by putting the fourth comparator into the second mode. .

In one embodiment, please refer to Figure 6, the control circuit also includes a first amplification module 41. The first amplification module 41 is connected in series between the pull-up module and the comparison module, that is, the input end of the first amplification module 41 is connected to the atomizer. The first end of the device interface, the output end of the first amplification module 41 is connected to the first input end of the comparison module 50, and the first amplification module 41 is used to amplify the detection voltage. In one embodiment, please refer to FIG. 7 , the control circuit also includes a second amplification module 43 , which is connected in series between the reference module and the comparison module, that is, the input end of the second amplification module 43 is connected to the reference module 30 The output terminal of the second amplification module 43 is connected to the second input terminal of the comparison module 50, and the amplification module is used to amplify the reference voltage. It can be understood that in order to reduce the leakage current in the control circuit and ensure the power saving effect, the resistance values of many resistors are often set to be larger, which may cause the detection voltage and the reference voltage to be too small and difficult to be distinguished by the comparison module 50. Therefore, the detection voltage Both the voltage and the reference voltage may be amplified before being input to the comparison module 50 . Only one of the first amplification module 41 and the second amplification module 43 may be provided, or both the first amplification module 41 and the second amplification module 43 may be provided.

In one embodiment, please refer to FIG. 8 , the reference module 30 may include a reference power supply, a first voltage dividing resistor 31 and The second voltage dividing resistor 33. The reference power supply is grounded through the first voltage dividing resistor 31 and the second voltage dividing resistor 33 , and the common terminal of the first voltage dividing resistor 31 and the second voltage dividing resistor 33 outputs the reference voltage. By adjusting the ratio between the first voltage dividing resistor 31 and the second voltage dividing resistor 33, reference voltages of different sizes can be selected to be output. In order to ensure the power saving effect, the resistance values of the first voltage dividing resistor 31 and the second voltage dividing resistor 33 are generally set as large as possible. However, the first ratio and the second ratio should be equal. The first ratio is the ratio between the resistance of the pull-up module 10 and the minimum resistance when the atomized matrix remains. The second ratio is the ratio between the resistance of the first voltage dividing resistor 31 and the resistance of the second voltage dividing resistor 33 . It can be seen that the selection of the resistance values of the first voltage dividing resistor 31, the second voltage dividing resistor 33 and the pull-up module is related to the minimum resistance value when the atomized matrix remains. Moreover, since the second ratio will affect the reference voltage output by the reference module, the size of the reference voltage should consider the threshold voltage that the comparison module can identify. In order to try to make the current when the circuit is running smaller, for example, assuming that the threshold voltage of the comparator identification judgment is 8 millivolts (it can only be identified if it is higher than this value), you can choose the reference voltage to be 8mV or round it to facilitate calculation, take 10mV. At this time, if the reference power supply is 3V, the second voltage dividing resistor 33 can be defined as 10K ohms, and the first voltage dividing resistor 31 can be defined as 3M ohms (the first ratio is 1/300, the reference voltage is 3V*1/300 =10mV). Assume that the minimum resistance between the atomizer interfaces when the atomization matrix remains is 1K ohms (the more the atomization matrix remains, the smaller the resistance. When there is no smoke oil, the resistance can be considered to be infinite), then the resistance of the pull-up module The value can be set as 1K*300=300K ohms. In this case, when the pull-up power supply is 3V, the current flowing through the pull-up module will be only about 10 microamps, which can achieve the purpose of saving more power.

In one embodiment, as shown in FIG. 9 , the energy supply module includes a heating power supply, a first switch module 90 , a third voltage dividing resistor 110 and a second switch module 130 . The heating power supply is connected to the first end of the atomizer interface through the first switch module 90 and the third voltage dividing resistor 110 . The heating power supply is directly connected to the first end of the atomizer interface through the second switch module 130 . When the aerosol generating device 1 needs to be used, the control module 70 first controls the first switch module 90 to be turned on and the second switch module 130 to be turned off. The resistance of the third voltage dividing resistor 110 is close to the resistance between the atomizer interfaces when the atomizer 20 is inserted. For example, the resistance between the atomizer interfaces is 1Ω, and the third voltage dividing resistor 110 is 4.7Ω. The control module 70 can obtain the voltage at the first end of the atomizer interface. If the voltage is close to the voltage of the heating power supply, the control module 70 will continue to monitor the voltage at the first end of the atomizer interface until the voltage is close to the preset voltage. Determine that the atomizer 20 is inserted. The preset voltage can be V _{heating power supply} * R _{atomization component} / (R _{atomization component} + R _{third voltage dividing resistor} ), where V _{heating power supply} is the voltage of the heating power supply, and R _{atomization component} is the atomizer inserted into the atomizer. When the atomizer interface is used, the resistance between the atomizer interface, R _{and the third voltage dividing resistor} is the resistance of the third voltage dividing resistor. After determining that the atomizer 20 is inserted, if the control module 70 detects the suction signal, it controls the first switch module 90 to be turned off and the second switch module 130 to be turned on. The heating power supply supplies power to the atomization component in the atomizer 20, and the atomization component heats the atomization matrix. The control module 70 can also control the conduction duration of the second switch module 130 through the PWM signal to control the heating power of the atomization component. After the heating is completed, the control module 70 controls the comparison module 50 to enter the first comparison state and the control module 70 itself enters the sleep state. The comparison module 50 can detect whether the atomizer 20 is pulled out. Once the atomizer 20 is pulled out, the comparison module 50 outputs the first interrupt signal to the control module Block 70, wake up the control module 70 to notify that the atomizer 20 has been pulled out. After the control module 70 determines that the atomizer 20 has been pulled out, it controls the comparison module 50 to enter the second comparison state and the control module 70 itself enters the sleep state. The comparison module 50 can then detect whether the atomizer 20 is inserted.

In one embodiment, the first switch module 90 and the second switch module 130 may include switching circuits based on MOS transistors, transistors, field effect transistors, etc. to implement on-off control. Please refer to Figure 10. The triangle in Figure 10 represents the connection control module 70. The first switch module includes a field effect transistor Q1, a resistor R11 and a resistor R12. The control module 70 sends a control signal to the field effect transistor Q1 through R11 to control the on and off of the field effect transistor Q1 to realize the on and off of the first switch module 90 control. The second switch module includes a field effect transistor Q2, a resistor R21 and a resistor R22. The control module 70 sends a control signal to the field effect transistor Q2 through R22 to control the on and off of the field effect transistor Q2 to realize the on and off of the second switch module 130. control. The third voltage dividing resistor 110 is R3 in the figure. The pull-up module 10 is R4 in the figure. The comparison module 50 includes a first comparator 51 and a second comparator 53 . R5 in the figure is the first voltage dividing resistor 31, and R6 in the figure is the second voltage dividing resistor 33. Although the power supplies in the figure are all marked as DC, you can actually choose to connect different nodes that provide voltage. Figure 10 is only illustrative and not limiting. For the circuit in Figure 10, taking the DC in the figure as battery voltage as an example, first the control module 70 turns off the field effect transistor Q1 and turns on the field effect transistor Q2. The control module 70 collects the detection provided by the pull-up module 10 through the analog-to-digital conversion port. The voltage (that is, the voltage at the common terminal of the atomizer and resistor R4) can be used to determine whether the atomizer is inserted. Specifically, if the voltage value collected by the control module 70 is very close to the battery voltage, it means that the atomizer has been pulled out. Assume that the resistance of the atomizer is about 1 ohm, and the resistance of the third voltage dividing resistor 110 is 4.7 ohms. If the voltage value collected by the control module 70 is close to V _{battery voltage} *1/(1+4.7), it means atomization The device is plugged in. When the nebulizer is inserted, the control module 70 may detect a puff signal indicating that the aerosol generating device is puffed by the user. The suction detection can be performed using techniques known in the art, which will not be described again here. When the control module 70 detects the suction signal, the first comparator 51 and the second comparator 53 are turned off. The control module 70 uses the PWM signal to drive the switch of the field effect transistor Q1 to supply energy to the atomizer, and the atomizer heats the atomization matrix inside it.

When the control module 70 determines that the atomizer is inserted and does not require the atomizer for heating (such as no suction signal is detected or heating is completed after detecting the suction signal), the control module 70 controls the first comparator 51 to open and the second comparator 51 to open. Comparator 53 turns off and goes to sleep. When the atomizer is pulled out, the detection voltage will appear to be greater than the reference voltage, so the first comparator 51 will output a first interrupt signal to the control module 70 . The control module 70 receives the first interrupt signal from the first comparator 51 and is awakened, and determines that the atomizer has been pulled out.

When the control module 70 determines that the atomizer is pulled out, the control module 70 controls the first comparator 51 to close, the second comparator 53 to open, and enters a sleep state. When the atomizer is inserted, since the resistance of the atomizer is very small, the detection voltage will be lower than the reference voltage, and therefore the second comparator 53 will output a second interrupt signal to the control module 70 . The control module 70 receives the second interrupt signal from the second comparator 53 and is awakened, and determines that the atomizer has been inserted, and enters sleep. state.

Returning to Figure 1, embodiments of the present application also provide an aerosol generating device 1, including an atomizer interface and a control circuit. The atomizer interface is used to insert the atomizer 20. The first end of the atomizer interface is connected to the energy supply module, and the second end of the atomizer interface is connected to ground. The control circuit includes a pull-up module 10 , a reference module 30 , a comparison module 50 and a control module 70 . The pull-up module 10 is connected between the atomizer interface and the pull-up power supply, and is configured to provide a corresponding detection voltage when the atomizer is inserted into or pulled out of the atomizer interface. Reference module 30 is configured to provide a reference voltage. The comparison module 50 is configured to output a first interrupt signal when the detected voltage is greater than the reference voltage, or to output a second interrupt signal when the detected voltage is less than the reference voltage. The control module 70 is configured to determine that the atomizer is unplugged when the first interrupt signal is received, or to determine that the atomizer is inserted when the second interrupt signal is received.

In one of the embodiments, the aerosol generating device 1 further includes a control circuit as in any of the above embodiments.

In the description of this specification, reference to the terms "some embodiments," "other embodiments," "ideal embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included herein. In at least one embodiment or example of the application. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

The technical features of the above embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, all possible combinations should be used. It is considered to be within the scope of this manual.

The above embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the present application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

A control circuit for an aerosol generating device, the aerosol generating device includes an atomizer interface and an atomizer removably connected to the atomizer interface, characterized in that the control circuit includes :

A pull-up module, connected to the atomizer interface, is configured to provide a state change corresponding to a state in which the atomizer interface is connected to the atomizer and a state in which the atomizer interface is not connected to the atomizer. detection voltage;

a reference module configured to provide a reference voltage;

a comparison module configured to output a first interrupt signal when the detection voltage is greater than the reference voltage, and to output a second interrupt signal when the detection voltage is less than the reference voltage; and

A control module configured to determine that the atomizer is removed from the atomizer interface when receiving the first interrupt signal, and to determine that the atomizer is removed from the atomizer interface when receiving the second interrupt signal. Connect to the nebulizer interface.
The control circuit according to claim 1, characterized in that the working state of the comparison module includes a first comparison state and a second comparison state that are mutually switchable, and the comparison module is configured as:

Only when the comparison module is in the first comparison state, perform the operation of outputting the first interrupt signal when the detection voltage is greater than the reference voltage;

Only when the comparison module is in the second comparison state, perform the operation of outputting the second interrupt signal when the detection voltage is less than the reference voltage; and

The control module is configured as:

When receiving the first interrupt signal, it is determined that the atomizer is removed from the atomizer interface, and the comparison module is switched to the second comparison state; and

When the second interrupt signal is received, it is determined that the atomizer is connected to the atomizer interface, and the comparison module is switched to the first comparison state.
The control circuit according to claim 2, characterized in that the comparison module includes:

A first comparator configured to output the first interrupt signal when the detection voltage is greater than the reference voltage; and

a second comparator configured to output the second interrupt signal when the detection voltage is less than the reference voltage; and

The control module is also configured as:

The comparison module is placed in the first comparison state by turning on the first comparator and turning off the second comparator; and

By turning off the first comparator and turning on the second comparator, the comparison module is placed in the 2. Comparison status.
The control circuit according to claim 2, wherein the comparison module includes a switching unit and a third comparator, and the switching unit has a first conduction state and a second conduction state;

The switch unit is configured as:

When the switch unit is in the first conductive state, the detection voltage is connected to the first input terminal of the third comparator, and the reference voltage is connected to the first input terminal of the third comparator. the second input terminal; and

When the switch unit is in the second conduction state, the reference voltage is connected to the first input terminal of the third comparator, and the detection voltage is connected to the first input terminal of the third comparator. second input terminal;

The third comparator is configured as:

When the switch unit is in the first conduction state and the voltage of the first input terminal of the third comparator is greater than the voltage of the second input terminal, the first interrupt signal is output; and

When the switching unit is in the second conduction state and the voltage of the first input terminal of the third comparator is greater than the voltage of the second input terminal, the second interrupt signal is output; and

The control module is also configured as:

The comparison module is placed in the first comparison state by controlling the switching unit to be placed in the first conduction state; and

The comparison module is placed in the second comparison state by controlling the switch unit to be placed in the second conduction state.
The control circuit according to claim 4, wherein the switch unit includes a first switch and a second switch;

The combined terminal of the first switch is connected to the detection voltage, the first branch terminal of the first switch is connected to the first input terminal of the third comparator, and the second branch terminal of the first switch is connected to the detection voltage. The terminal is connected to the second input terminal of the third comparator. When the first switch is in the first conductive state, the combined terminal of the first switch and the first branch terminal of the first switch are connected to the second input terminal of the third comparator. There is conduction between the combined end of the first switch and the second branch end of the first switch when the first switch is in the second conductive state; and

The combined end of the second switch is connected to the reference voltage, the first shunt end of the second switch is connected to the first input end of the third comparator, and the second shunt end of the second switch is connected to the reference voltage. The terminal is connected to the second input terminal of the third comparator. When the second switch is in the first conductive state, the combined terminal of the second switch and the second branch terminal of the second switch are connected to the second input terminal of the third comparator. When the second switch is in the second conductive state, there is conduction between the combined end of the second switch and the first branch end of the second switch.
The control circuit according to claim 2, wherein the comparison module includes a fourth comparator, and the A fourth comparator is integrated in the control module. The working mode of the fourth comparator includes a first mode and a second mode. The first input terminal of the fourth comparator is connected to the detection voltage. The fourth comparator is connected to the detection voltage. The second input terminal of the four comparators is connected to the reference voltage;

The fourth comparator is configured to: when the fourth comparator is in the first mode and the voltage of the first input terminal of the fourth comparator is greater than the voltage of the second input terminal of the fourth comparator, Or when the fourth comparator is in the second mode and the voltage of the first input terminal of the fourth comparator is less than the voltage of the second input terminal of the fourth comparator, an interrupt signal is output; and

The control module is configured as:

When the fourth comparator is in the first mode, the interrupt signal output by the fourth comparator is determined to be the first interrupt signal, and when the fourth comparator is in the second mode, Determine that the interrupt signal output by the fourth comparator is the second interrupt signal;

by placing the fourth comparator in the first mode to place the comparison module into the first comparison state, and for placing the fourth comparator in the second mode to place the The comparison module is placed in the second comparison state.
The control circuit according to claim 1, characterized in that the control circuit further includes a first amplification module, the first amplification module is connected in series between the pull-up module and the comparison module and is configured to The detection voltage is amplified.
The control circuit according to claim 1, characterized in that the control circuit further includes a second amplification module, the second amplification module is connected in series between the reference module and the comparison module and is configured to reference voltage for amplification.
The control circuit according to claim 2, characterized in that the control module is further configured to:

Enter the sleep state after determining that the atomizer is removed from the atomizer interface and switching the comparison module to the second comparison state; and

After determining that the atomizer is connected to the atomizer interface and switching the comparison module to the first comparison state, the sleep state is entered.
The control circuit according to claim 1, characterized in that the reference module includes a reference power supply, a first voltage dividing resistor and a second voltage dividing resistor, and the reference power supply passes through the first voltage dividing resistor and the third voltage dividing resistor. The two voltage-dividing resistors are grounded, and the common terminal of the first voltage-dividing resistor and the second voltage-dividing resistor is used to output the reference voltage.
The control circuit according to claim 10, wherein the pull-up module includes a pull-up resistor, and the ratio of the resistance of the pull-up resistor to the preset minimum resistance is equal to the resistance of the first voltage dividing resistor. The ratio of the value to the resistance value of the second voltage dividing resistor, wherein the preset minimum resistance value is the minimum resistance value when there is residual atomization matrix in the atomizer interface.
The control circuit according to claim 2, characterized in that the control circuit further includes a first switch module, The third voltage dividing resistor and the second switch module; the first switch module is configured to connect the heating power supply to the atomizer interface through the third voltage dividing resistor when turned on; the second switch module is configured To connect the heating power supply to the atomizer interface during conduction;

The control module is configured as:

The detection voltage is obtained by turning on the first switch module and turning off the second switch module;

When the detection voltage matches the preset voltage, it is determined that the atomizer is connected to the atomizer interface;

After it is determined that the atomizer is connected to the atomizer interface, if a suction signal is detected, the first switch module is disconnected and the second switch module is switched on, so that the atomizer The device is heated under the power supply of the heating power supply.
The control circuit according to claim 12, wherein the control module is further configured to switch the comparison module into the first comparison state after the atomizer is heated.
The control circuit according to any one of claims 1 to 13, characterized in that the reference voltage is less than a minimum residual voltage, and the minimum residual voltage is when the atomizer is removed from the atomizer interface. And the minimum detection voltage when the atomization matrix remains at the atomizer interface.
An aerosol generating device, characterized by comprising the control circuit according to any one of claims 1 to 14.