Aerosol generating device and control method

Abstract

The embodiment of the invention relates to an aerosol generating device. The aerosol-generating device includes: a heating element; the switching circuit and the heating element jointly form a power output loop; the controller is configured to output a control signal so as to control the heating element to heat; the reset module is further configured to reset according to a fault signal of the power output loop; and the logic gate circuit is configured to adjust the control signal output by the controller to the switching circuit according to the fault signal of the power output loop, so that the switching circuit is kept in an off state, and the heating element is controlled to stop heating. The aerosol generating device receives the fault signal of the power output loop where the heating element is located through the logic gate circuit so as to control the heating element to stop heating, and the controller resets according to the fault signal of the power output loop, so that an object in contact with the aerosol generating device is prevented from being damaged by high temperature; and the working safety of the controller is ensured.

Description

Technical Field

[0001] This application relates to the technical field of electronic atomization, and in particular, to an aerosol generating device and a control method therefor. Background Art

[0002] In an aerosol generating device, generally, a heating element is used to heat an aerosol forming substrate to generate an inhalable aerosol. The aerosol forming substrate can be a liquid substrate, such as e-liquid; or a solid substrate, such as an aerosol generating article, i.e., a cigarette stick.

[0003] However, when the heating element malfunctions, it will cause the heating element to continuously heat or generate an undesired high temperature. Such uncontrolled heat release will lead to a series of problems such as scalding the user, damaging the handbag, and causing a fire. Summary of the Invention

[0004] The aerosol generating device and the control method provided by the embodiments of this application can solve at least a part of the defects of the prior art.

[0005] In a first aspect, an embodiment of this application provides an aerosol generating device. The aerosol generating device includes: a heating element for heating an aerosol forming substrate to generate an aerosol; a switch circuit that forms a power output loop together with the heating element; a controller configured to output a control signal to control the switch circuit to alternately conduct and disconnect, thereby controlling the heating element to heat; and further configured to perform a reset according to a fault signal of the power output loop; a logic gate circuit configured to adjust the control signal output by the controller to the switch circuit according to the fault signal of the power output loop, so that the switch circuit remains in an off state, thereby controlling the heating element to stop heating.

[0006] In one example, it further includes: a sampling module, a reference voltage generation module, and a comparison module; the sampling module is configured to: collect an electrical signal of the power output loop and convert it into a corresponding sampled electrical signal; the reference voltage generation module is configured to: output a reference electrical signal; the comparison module is configured to: output the fault signal when the magnitude relationship between the sampled electrical signal and the corresponding reference electrical signal changes.

[0007] In one example, the sampling module includes: a current sampling module configured to: collect the output current of the power output loop and convert it into a first sampled electrical signal.

[0008] In one example, the current sampling module specifically includes: a voltage acquisition unit configured to acquire a voltage signal across a sampling resistor connected in series in the power output loop; and an amplification unit configured to proportionally amplify the voltage signal formed by the voltage acquisition unit to generate a first sampled electrical signal.

[0009] In one example, the sampling module further includes: a temperature detection module configured to obtain temperature information of the heating element and convert the temperature information into a second sampled electrical signal.

[0010] In one example, the reference electrical signal includes: a first reference electrical signal and a second reference electrical signal; the sampled electrical signal includes a first sampled electrical signal and a second sampled electrical signal; the comparison module includes: a first comparator having a first sampled input terminal, a first reference input terminal, and a first output terminal; the first sampled input terminal receives the first sampled electrical signal; the first reference input terminal receives the first reference electrical signal; a second comparator having a second sampled input terminal, a second reference input terminal, and a second output terminal; the second sampled input terminal receives the second sampled electrical signal; the second reference input terminal receives the second reference electrical signal; wherein, the first comparator is configured to: when the first sampled electrical signal is greater than the first reference electrical signal, form a first level signal at the first output terminal; and when the first sampled electrical signal is less than the first reference electrical signal, form a second level signal at the first output terminal; the second comparator is configured to: when the second sampled electrical signal is less than the second reference electrical signal, form a first level signal at the second output terminal; and when the second sampled electrical signal is greater than the second reference electrical signal, form a second level signal at the second output terminal; the first level signal is used to indicate the fault signal.

[0011] In one example, the reference voltage generation module includes: a first resistor, a second resistor, a third resistor, and a fourth resistor; wherein, one end of the first resistor is connected to a DC voltage source, the other end of the first resistor is grounded through the second resistor, and a first connection node is formed between the first resistor and the second resistor; the first reference input terminal is connected to the first connection node; one end of the third resistor is connected to the DC voltage source, the other end of the third resistor is grounded through the fourth resistor, and a second connection node is formed between the third resistor and the fourth resistor; the second reference input terminal is connected to the second connection node.

[0012] In one example, the logic gate circuit includes: a logic gate, and the logic gate is an AND gate.

[0013] In one example, the voltage level of the first level signal is less than that of the second level signal.

[0014] In one example, the controller includes: a reset pin; both the first output terminal and the second output terminal are connected to the reset pin; the reset pin is configured to: when a first level signal is formed at the first output terminal and / or a first level signal is formed at the second output terminal, receive the first level signal so that the controller is reset according to the first level signal.

[0015] In a second aspect, an embodiment of the present application provides a control method for an aerosol generating device. The control method includes: obtaining a sampling signal; determining whether the sampling signal meets a preset fault detection condition; generating a fault signal when the sampling signal meets the fault detection condition; providing the fault signal to a controller of the aerosol generating device to reset the controller; and when the fault signal is generated, controlling a switch circuit of the aerosol generating device to disconnect a power output loop; the power output loop is jointly formed by the switch circuit and a heating element.

[0016] In one example, the sampling signal includes: a first sampling electrical signal and a second sampling electrical signal; wherein, the first sampling electrical signal is obtained by converting an output current of a power output loop of the aerosol generating device; the second sampling electrical signal is obtained by converting temperature information of the heating element; the determining whether the sampling signal meets the preset fault detection condition specifically includes: determining whether the first sampling electrical signal is greater than a preset first reference electrical signal; determining whether the second sampling electrical signal is less than a preset second reference electrical signal; wherein, when the first sampling electrical signal is greater than the first reference electrical signal, or the second sampling electrical signal is less than the second reference electrical signal, the fault signal is generated.

[0017] In one example, the controlling the switch circuit of the aerosol generating device to disconnect the power output loop when the fault signal is generated; the power output loop is jointly formed by the switch circuit and the heating element, specifically includes: when the fault signal is not received, controlling the switch circuit to conduct and disconnect alternately through a control signal; the control signal is a periodic square wave signal; when the fault signal is received, keeping the switch circuit in an off state.

[0018] At least one advantageous aspect of the aerosol generating device provided by the embodiment of the present application is that: a fault signal of a power output loop where a heating element is located is received through a logic gate circuit to control the heating element to stop heating, and the controller is reset according to the fault signal of the power output loop, thereby avoiding damage to an object contacted by the aerosol generating device due to high temperature and ensuring the working safety of the controller. Description of the Drawings

[0019] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the figures do not constitute a scale limitation.

[0020] Figure 1 The structural schematic diagram of an aerosol generating device provided by an embodiment of the present application;

[0021] Figure 2 The structural schematic diagram of another aerosol generating device provided by an embodiment of the present application;

[0022] Figure 3 The functional block diagram of the aerosol generating device provided by an embodiment of the present application;

[0023] Figure 4 The functional block diagram of the aerosol generating device provided by another embodiment of the present application;

[0024] Figure 5 The circuit schematic diagram of the aerosol generating device provided by an embodiment of the present application;

[0025] Figure 6 The method flowchart of the control method of the aerosol generating device provided by an embodiment of the present application. Detailed implementation manners

[0026] To facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "upper", "lower", "inner", "outer", "bottom", etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for facilitating the description of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in this specification in the description of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0028] In addition, the technical features involved in different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0029] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of an aerosol generating device provided for an embodiment of this application. As Figure 1 shown, the aerosol generating device 100 includes a heating element 10, a battery 20, and a charging interface 30.

[0030] Among them, the heating element 10 is used to heat the aerosol-forming substrate to generate aerosol. Among them, the aerosol-forming substrate is a liquid substrate that can release volatile compounds that can form aerosol. Such volatile compounds can be released by heating the aerosol-forming substrate.

[0031] The battery 20 is used to supply power to the heating element 10. Among them, the battery 20 can be a lithium-ion battery, a lithium-metal battery, a lead-acid battery, a nickel-cadmium battery, a nickel-metal hydride battery, a lithium-sulfur battery, a lithium-air battery, or a sodium-ion battery, etc., which is not limited herein. In terms of scale, the battery 20 in the embodiment of this application can be a single battery cell, or can also be a battery module composed of multiple battery cells connected in series and / or in parallel, etc., which is not limited herein. By way of example and not limitation, the battery 20 can also include more or fewer components, or have a different component configuration, which is not limited in the embodiment of this application.

[0032] The charging interface 30 is used to be electrically connected to the charger 200 so that the charger 200 can charge the battery 20 through the charging interface 30. In some embodiments, the charging interface 30 refers to a socket or port used to connect a power adapter or charger to charge an electronic device. Different brands, models, and types of aerosol generating devices 100 may use different types of interfaces, such as USB interfaces such as Micro USB and TYPE-C. The charger 200 is a device that can charge the battery 20, such as a power adapter or a charger, etc. By way of example and not limitation, the battery 20 can also be charged by wireless charging, and in this case, the charger 200 is a wireless charger. By way of example and not limitation, the battery 20 can also be a disposable battery, that is, no charging is required.

[0033] It should be noted that asFigure 1 The hardware structure of the aerosol generating device 100 shown is only an example. Moreover, the aerosol generating device 100 may have more or fewer components than those shown in the figure, two or more components may be combined, or it may have a different component configuration. The various components shown in the figure may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and / or application specific integrated circuits.

[0034] In one example, the heating element 10 and the aerosol forming substrate may be provided in a first component, while the battery 20 and the charging interface 30 may be provided in a second component. The first component and the second component are detachably connected. The first component is generally referred to as a cartridge or an atomizer, and the second component is a cigarette rod or a power supply device.

[0035] Figure 2 This is a schematic structural diagram of another aerosol generating device provided by an embodiment of the present application. As Figure 2 shown, the aerosol generating device 100 includes:

[0036] Chamber A, an aerosol generating article B is removably received in chamber A; the aerosol generating article B includes a solid aerosol forming substrate.

[0037] Heating element 10, when the aerosol generating article B is received in chamber A, the heating element 10 can be inserted into the aerosol generating article B for heating to generate an aerosol.

[0038] Battery 20, for power supply; the battery 20 may be a rechargeable battery cell or a disposable battery cell.

[0039] Circuit 40, for controlling the aerosol generating device; for example, controlling the battery 20 to supply power to the heating element 10.

[0040] In one example, the circuit 40 includes a controller. The controller is a hardware component configured to control the overall operation of the aerosol generating device. The controller may include at least one processor. The processor may be implemented as an array of multiple logic gates, or may be implemented as a combination of a general - purpose microprocessor and a memory, and a program executable in the microprocessor is stored in the memory. Those of ordinary skill in the art will understand that the processor may be implemented in other forms of hardware.

[0041] Similar to the Figure 1 example, the aerosol generating device 100 further includes a charging interface for electrically connecting to a charger so that the charger can charge the battery 20 through the charging interface.

[0042] It should be noted that the heating methods of the heating element 10 include, but are not limited to, resistance heating, electromagnetic heating, infrared heating, and air heating. The shape of the heating element 10 includes, but is not limited to, a pin shape or a flake shape.

[0043] It should also be noted that, different from Figure 1 the example, in other examples, the heating element 10 is configured to heat around at least part of the aerosol generating article B, that is, the so-called circumferential heating or peripheral heating, etc., which is also feasible.

[0044] In some embodiments, the aerosol generating device may execute a suitable control method to implement the functions of fault detection and reset, so as to avoid problems such as scalding caused by continuous heating of the aerosol generating device.

[0045] As Figure 6 shown, Figure 6 is the flowchart of the control method of the aerosol generating device provided by the embodiment of the present application.

[0046] S610. Obtain a sampling signal.

[0047] Among them, the sampling signal refers to one or more parameters obtained by detecting through a sensor or other suitable sampling functional circuit, which can reflect the operating state of the aerosol generating device.

[0048] S620. Determine whether the sampling signal meets the preset fault detection conditions. If so, execute step S630. If not, continue to monitor until the sampling signal is updated and enters the next detection cycle.

[0049] S630. Generate a fault signal.

[0050] Among them, the fault signal can be any suitable type of electrical signal selected according to the actual situation. It only needs to be able to distinguish whether there is a fault. For example, the fault signal can be a low-level signal. Correspondingly, when no fault signal is generated, it remains at a high level.

[0051] S640. Provide the fault signal to the controller of the aerosol generating device to reset the controller.

[0052] Among them, the controller reset is an operation to instruct the controller to return to the initial state. It can be achieved by providing a specific high-level or low-level signal to the reset pin of the controller.

[0053] S650. When generating a fault signal, control the switch circuit of the aerosol generating device to disconnect the power output loop.

[0054] Among them, the power output loop is formed by a loop jointly formed by a switching circuit and a heating element. In other words, whether the heating element works and the heating power during operation can be controlled by the switching circuit.

[0055] Specifically, the above sampling signals may include: a first sampling electrical signal and a second sampling electrical signal. Among them, the first sampling electrical signal can be obtained by converting the output current of the power output loop of the aerosol generating device, and the second sampling electrical signal is obtained by converting the temperature information of the heating element.

[0056] Please continue to refer to Figure 6 , correspondingly, step S620 specifically includes:

[0057] S621. Determine whether the first sampling electrical signal is greater than a preset first reference electrical signal. If so, execute step S630. If not, it is confirmed that the preset fault detection condition is not met and no fault has occurred.

[0058] Among them, the first reference electrical signal is a preset voltage signal. It is a standard for judging whether the current exceeds the permitted value and can be set by technicians according to actual needs.

[0059] S622. Determine whether the second sampling electrical signal is less than a preset second reference electrical signal. If so, execute step S630. If not, it is confirmed that the preset fault detection condition is not met and no fault has occurred.

[0060] Among them, the second reference electrical signal is similar to the first reference electrical signal and is also a preset voltage signal, which is applicable to judging whether the temperature exceeds the normal situation standard.

[0061] At least one advantageous aspect of the control method provided by the embodiments of the present application is that: in the case where a running fault is determined, the controller can be controlled to be reset according to the fault signal, and the heating element can be controlled to stop heating, which can avoid damage to the object contacted by the heating element due to high temperature, and can avoid long-term over-discharge current of the battery cell due to the loss of control ability of the controller.

[0062] To fully describe the inventive concept of the present application, the following provides an aerosol generating device capable of executing and implementing the above control method.

[0063] Figure 3 It is a functional block diagram of the aerosol generating device provided by the embodiments of the present application, and its specific implementation form can be determined according to different actual application scenarios. For example, a non-combustible aerosol generating device. As Figure 3 shown, the aerosol generating device includes: a heating element 310, a switching circuit 320, a controller 330, and a logic gate circuit 340.

[0064] The heating element 310 is used to heat the aerosol - forming substrate to generate an aerosol.

[0065] The switching circuit 320 is connected to the heating element 310. The switching circuit 320 and the heating element 310 together form a power output loop. The power output loop is a component for orderly controlling the electric energy supplied to the heating element 310. It can cut off or restore the power supply to the heating element 310 based on the control signal provided by the controller 330. The switching circuit 320 is also connected to the logic gate circuit 340 and is used to receive the control signal adjusted by the logic gate circuit 340. It can be understood that the switching circuit 320 can be any suitable type of controllable switch or a combination thereof (such as a power MOS transistor). It serves as a switch on the power output loop.

[0066] The controller 330 is respectively connected to the power output loop and the logic gate circuit 340. The controller 330 is the main control core of the entire aerosol - generating device. By outputting a control signal, the control signal passes through the logic gate circuit 340 and is output to the switching circuit 320 to control the switching circuit 320 to alternately conduct and disconnect, thereby controlling the heating element 310 to heat. The output power corresponding to the heating element 310 can be adjusted and controlled through the control signal. Exemplarily, the controller 330 can adjust the output power by means of Pulse Width Modulation (PWM), that is, by adjusting the pulse width of the PWM signal (control signal), to control the electric energy provided to the heating element 310 per unit time by the power output loop. The controller 330 is also configured to: reset according to the fault signal of the power output loop.

[0067] The logic gate circuit 340 is respectively connected to the power output loop and the controller 330. The logic gate circuit 340 is used to receive the fault signal of the power output loop and the control signal output by the controller 330. Therefore, the logic gate circuit 340 is configured to adjust the control signal output from the controller 330 to the switching circuit 320 according to the fault signal of the power output loop, so that the switching circuit 320 remains in the off state, thereby controlling the heating element 310 to stop heating.

[0068] Figure 4 It is a functional block diagram of an aerosol - generating device provided in another embodiment of the present application.

[0069] In some embodiments, as Figure 4 shown, the aerosol - generating device further includes: a sampling module 350, a reference voltage generating module 360, and a comparison module 370.

[0070] The sampling module 350 is connected to the comparison module 370. The sampling module 350 is configured to collect the electrical signal of the power output loop and convert it into a corresponding sampled electrical signal, and then output the sampled electrical signal to the comparison module 370. Among them, by way of example and not limitation, the electrical signal of the power output loop includes but is not limited to the output current of the power output loop and the temperature information of the heating element 310.

[0071] The reference voltage generation module 360 is connected to the comparison module 370. The reference voltage generation module 360 is configured to output a reference electrical signal and transmit the reference electrical signal to the comparison module 370.

[0072] The comparison module 370 is configured to receive the sampled electrical signal output by the sampling module 350 and the reference electrical signal output by the reference voltage generation module 360, and then compare the sampled electrical signal with the corresponding reference electrical signal, and further output a corresponding level signal. The comparison module 370 is configured to: output a fault signal when the magnitude relationship between the sampled electrical signal and the corresponding reference electrical signal changes. By way of example, when the sampled electrical signal is less than the corresponding reference electrical signal, the comparison module 370 outputs a level 1 signal, and the level 1 signal is used to indicate that the power output loop is operating normally. When the sampled electrical signal is greater than the corresponding reference electrical signal, the comparison module 370 outputs a level 2 signal, and the level 2 signal is used to indicate a fault signal.

[0073] The comparison module 370 is also connected to the controller 330 and the logic gate circuit 340 respectively. The comparison module 370 transmits the output level signal to the controller 330 and the logic gate circuit 340. When the level signal output by the comparison module 370 is used to indicate a fault signal, the controller 330 is reset according to the fault signal, and the logic gate circuit 340 adjusts the control signal output by the controller 330 to the switch circuit 320 according to the fault signal, so that the switch circuit 320 remains in the off state, thereby controlling the heating element 310 to stop heating. When the level signal output by the comparison module 370 is used to indicate that the power output loop is operating normally, the controller 330 operates normally according to the level signal, and the logic gate circuit 340 does not adjust the control signal output by the controller 330 to the switch circuit 320 according to the level signal. Thus, the switch circuit 320 performs alternating conduction and disconnection according to the control signal output by the controller 330, and further controls the heating element 310 to heat.

[0074] It should be noted that the control signal output by the controller 330 is a signal with a periodically changing level (for example, the above-mentioned PWM signal). Thus, by providing control signals with different level widths, the on-time of the switch circuit 320 in each period can be correspondingly controlled, so as to adjust the electrical energy output in each period.

[0075] At least one advantageous aspect of the aerosol generating device provided by the embodiments of the present application is that a fault signal of the power output circuit where the heating element is located is received through a logic gate circuit to control the heating element to stop heating, and the controller is reset according to the fault signal of the power output circuit, thereby avoiding damage to the object contacted by the aerosol generating device due to high temperature and ensuring the safe operation of the controller.

[0076] Figure 5 It is the circuit schematic diagram of the aerosol generating device provided by the embodiments of the present application.

[0077] In some embodiments, as Figure 5 shown, the sampling module 350 includes: a current sampling module 351, configured to: collect the output current of the power output circuit and convert it into a first sampled electrical signal.

[0078] In some embodiments, as Figure 5 shown, the current sampling module 351 specifically includes: a voltage acquisition unit 3511 and an amplification unit 3512.

[0079] Among them, the voltage acquisition unit 3511 is connected to the amplification unit 3512. The voltage acquisition unit 3511 is configured to: collect the voltage signal across the sampling resistor connected in series in the power output circuit. It can be understood that: the voltage acquisition unit 3511 is used to collect the output current of the power output circuit and calculate the voltage signal across the sampling resistor according to the resistance value of the sampling resistor.

[0080] The amplification unit 3512 is configured to: proportionally amplify the voltage signal formed by the voltage acquisition unit 3511 to generate a first sampled electrical signal. It can be understood that: the amplification unit 3512 is used to proportionally amplify the voltage signal formed by the voltage acquisition unit 3511 to generate a first sampled electrical signal.

[0081] It should be noted that the components included in the voltage acquisition unit 3511 and the amplification unit 3512 can be set according to the actual application scenario, as long as they can convert the output current of the power output circuit into a corresponding voltage signal and amplify it to generate a first sampled electrical signal, which is not limited here.

[0082] In some embodiments, as Figure 5 shown, the sampling module 350 further includes: a temperature detection module 352, configured to: obtain the temperature information of the heating element 310 and convert the temperature information into a second sampled electrical signal.

[0083] It should be noted that the components included in the temperature detection module 352 can be set according to the actual application scenario, as long as they can convert the temperature data of the heating element 310 into a second sampled electrical signal, which is not limited here.

[0084] In some embodiments, the reference electrical signal includes: a first reference electrical signal and a second reference electrical signal.

[0085] In some embodiments, the sampled electrical signal includes a first sampled electrical signal and a second sampled electrical signal.

[0086] In some embodiments, as Figure 5 shown, the comparison module 370 includes: a first comparator A and a second comparator B.

[0087] Among them, the first comparator A has: a first sampling input terminal INA-, a first reference input terminal INA+, and a first output terminal OUT_A. The first sampling input terminal INA- is connected to the current sampling module 351. The first sampling input terminal INA- receives the first sampled electrical signal. Specifically, the first sampling input terminal INA- is connected to the amplification unit 3512 in the current sampling module 351. The first reference input terminal INA+ is connected to the reference voltage generation module 360. The first reference input terminal INA+ receives the first reference electrical signal.

[0088] The first comparator A is configured to: when the first sampled electrical signal is greater than the first reference electrical signal, form a first level signal at the first output terminal OUT_A; and when the first sampled electrical signal is less than the first reference electrical signal, form a second level signal at the first output terminal OUT_A.

[0089] The second comparator B has: a second sampling input terminal INB+, a second reference input terminal INB-, and a second output terminal OUT_B. The second sampling input terminal INB+ is connected to the temperature detection module 352. The second sampling input terminal INB+ receives the second sampled electrical signal; the second reference input terminal INB- is connected to the reference voltage generation module 360. The second reference input terminal INB- receives the second reference electrical signal.

[0090] The second comparator B is configured to: when the second sampled electrical signal is less than the second reference electrical signal, form a first level signal at the second output terminal OUT_B; and when the second sampled electrical signal is greater than the second reference electrical signal, form a second level signal at the second output terminal OUT_B.

[0091] It should be noted that the first level signal is used to indicate a fault signal.

[0092] It should be noted that the voltage level of the first reference electrical signal is 1.5 times the target voltage level, where the target voltage level is: the voltage level corresponding to the first sampled electrical signal formed by the current sampling module 351 when the power output loop has the maximum output current value.

[0093] It should be noted that the voltage level of the first level signal is less than that of the second level signal. Exemplarily, the first level signal is a low level and the second level signal is a high level.

[0094] In some embodiments, as Figure 5 shown, the reference voltage generation module 360 includes: a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4.

[0095] Among them, one end of the first resistor R1 is connected to the DC voltage source V+, and the other end of the first resistor R1 is grounded through the second resistor R2, and a first connection node J1 is formed between the first resistor R1 and the second resistor R2; the first reference input terminal INA+ is connected to the first connection node J1.

[0096] One end of the third resistor R3 is connected to the DC voltage source V+, and the other end of the third resistor R3 is grounded through the fourth resistor R4, and a second connection node J2 is formed between the third resistor R3 and the fourth resistor R4; the second reference input terminal INB- is connected to the second connection node J2.

[0097] In some embodiments, as Figure 5 shown, the reference voltage generation module 360 further includes: a first capacitor C1 and a second capacitor C2.

[0098] Among them, the first capacitor C1 is connected in parallel across the two ends of the second resistor R2, and the second capacitor C2 is connected in parallel across the two ends of the fourth resistor R4.

[0099] It can be understood that both the first capacitor C1 and the second capacitor C2 can absorb the overvoltage in the spike state, thereby preventing the voltage mutation from damaging the reference voltage generation module 360.

[0100] In some embodiments, as Figure 5 shown, the logic gate circuit 340 includes: a logic gate 341, and the logic gate 341 is an AND gate.

[0101] The logic gate 341 has: a first signal input terminal 3411, a second signal input terminal 3412, and a signal output terminal 3413.

[0102] Among them, the first signal input terminal 3411 is connected to the comparison module 370. Specifically, the first signal input terminal 3411 is respectively connected to the first output terminal OUT_A and the second output terminal OUT_B to receive the output signal of the comparison module 370.

[0103] The second signal input terminal 3412 is connected to the controller 330 to receive the control signal output by the controller 330.

[0104] The signal output terminal 3413 is connected to the switching circuit 320 to output the voltage signal obtained by performing an AND operation on the output signal of the comparison module 370 and the control signal output by the controller 330 to the switching circuit 320.

[0105] In some embodiments, as Figure 5 shown, the comparison module 370 may further include: a third capacitor C3 and a fifth resistor R5.

[0106] Among them, the first end of the third capacitor C3 is connected to the DC voltage source V+, and the second end of the third capacitor C3 is connected to the ground GND. The first end of the fifth resistor R5 is connected to the DC voltage source V+, and the second end of the fifth resistor R5 is respectively connected to the first output terminal OUT_A and the second output terminal OUT_B. It should be noted that the third capacitor C3 can absorb the overvoltage in the spike state, thereby preventing the voltage mutation from damaging the comparison module 370. The fifth resistor R5 serves as the pull-up resistor of the comparison module 370.

[0107] In some embodiments, as Figure 5 shown, the first comparator A may further include: a first power input terminal Vin_1 and a first ground terminal GND_1. The second comparator B may further include: a second power input terminal Vin_2 and a second ground terminal GND_2.

[0108] Among them, both the first power input terminal Vin_1 and the second power input terminal Vin_2 are connected to the DC voltage source V+, and both the first ground terminal GND_1 and the second ground terminal GND_2 are connected to the ground GND.

[0109] In some embodiments, as Figure 5 shown, the logic gate 341 further has: a third power input terminal Vin_3 and a third ground terminal GND_3.

[0110] In some embodiments, as Figure 5 shown, the logic gate circuit 340 further includes: a fourth capacitor C4.

[0111] Among them, the first end of the fourth capacitor C4 is connected to the DC voltage source V+ and forms a third connection node J3, and the second end of the fourth capacitor C4 is connected to the ground GND. It should be noted that the fourth capacitor C4 can absorb the overvoltage in the spike state, thereby preventing the voltage mutation from damaging the logic gate.

[0112] The third power input terminal Vin_3 is connected to the third connection node J3, and the third ground terminal GND_3 is connected to the ground GND.

[0113] In some embodiments, as Figure 5 shown, the controller 330 has: a reset pin XRES.

[0114] Wherein, both the first output terminal OUT_A and the second output terminal OUT_B are connected to the reset pin XRES, and the reset pin XRES is configured to: receive the first level signal when a first level signal is formed at the first output terminal OUT_A and / or a first level signal is formed at the second output terminal OUT_B, so that the controller 330 is reset according to the first level signal.

[0115] By resetting the controller, the controller can be restored to a normal working state, and the long-term over-discharge current of the battery cell caused by the loss of control ability of the controller can be avoided.

[0116] In some embodiments, as Figure 5 shown, the aerosol generating device may further include: a fifth capacitor C5 and a sixth resistor R6.

[0117] Wherein, the first end of the sixth resistor R6 is connected to the DC voltage source V+, the second end of the sixth resistor R6 is connected to the first end of the fifth capacitor C5 and a fourth connection node J4 is formed, and the second end of the fifth capacitor C5 is connected to the ground GND.

[0118] In some embodiments, as Figure 5 shown, the controller 330 further has: an output pin P1 for a control signal.

[0119] Wherein, the reset pin XRES is connected to the fourth connection node J4, and the fourth connection node J4 is respectively connected to the first output terminal OUT_A and the second output terminal OUT_B. It should be noted that the fifth capacitor C5 can absorb the overvoltage in the spike state, thereby preventing the voltage mutation from damaging the controller 330. The sixth resistor R6 serves as a pull-up resistor for the reset pin XRES. The output pin P1 is connected to the second signal input terminal 3412, and the control signal is output to the logic gate 341 in the logic gate circuit 340 through the output pin P1.

[0120] At least one advantageous aspect of the aerosol generating device provided by the embodiments of the present application is that: the fault signal of the power output loop where the heating element is located is received through the logic gate circuit to control the heating element to stop heating, and the controller is reset according to the fault signal of the power output loop, thereby avoiding damage to the object contacted by the aerosol generating device due to high temperature, and by resetting the controller, the controller can be restored to a normal working state, and the long-term over-discharge current of the battery cell caused by the loss of control ability of the controller can be avoided.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; under the idea of the present application, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present application as described above. For the sake of brevity, they are not provided in detail; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An aerosol generating device, characterized in that, Comprising: A heating element for heating an aerosol-forming substrate to generate an aerosol; A switching circuit that forms a power output loop together with the heating element; A controller configured to output a control signal to control the switching circuit to alternately conduct and disconnect, thereby controlling the heating element to heat; and further configured to reset according to a fault signal of the power output loop; A logic gate circuit configured to adjust the control signal output from the controller to the switching circuit according to the fault signal of the power output loop, so that the switching circuit remains in the off state, thereby controlling the heating element to stop heating.

2. The aerosol generating device according to claim 1, characterized in that, Further comprising: A sampling module, a reference voltage generation module, and a comparison module; The sampling module is configured to: collect an electrical signal of the power output loop and convert it into a corresponding sampled electrical signal; The reference voltage generation module is configured to: output a reference electrical signal; The comparison module is configured to: output the fault signal when the magnitude relationship between the sampled electrical signal and the corresponding reference electrical signal changes.

3. The aerosol generating device according to claim 2, characterized in that, The sampling module includes: a current sampling module configured to: collect the output current of the power output loop and convert it into a first sampled electrical signal.

4. The aerosol generating device according to claim 3, characterized in that, The current sampling module specifically includes: A voltage acquisition unit configured to: collect a voltage signal across a sampling resistor connected in series in the power output loop; An amplification unit configured to: proportionally amplify the voltage signal formed by the voltage acquisition unit to generate a first sampled electrical signal.

5. The aerosol generating device according to claim 2, characterized in that, The sampling module further includes: a temperature detection module configured to: obtain the temperature information of the heating element and convert the temperature information into a second sampled electrical signal.

6. The aerosol generating device according to claim 2, wherein, The reference electrical signal includes: a first reference electrical signal and a second reference electrical signal; the sampled electrical signal includes a first sampled electrical signal and a second sampled electrical signal; The comparison module includes: A first comparator having a first sampled input terminal, a first reference input terminal, and a first output terminal; the first sampled input terminal receives the first sampled electrical signal; the first reference input terminal receives the first reference electrical signal; A second comparator having a second sampled input terminal, a second reference input terminal, and a second output terminal; the second sampled input terminal receives the second sampled electrical signal; the second reference input terminal receives the second reference electrical signal; Wherein, the first comparator is configured to: form a first level signal at the first output terminal when the first sampled electrical signal is greater than the first reference electrical signal; and form a second level signal at the first output terminal when the first sampled electrical signal is less than the first reference electrical signal; The second comparator is configured to: form a first level signal at the second output terminal when the second sampled electrical signal is less than the second reference electrical signal; and form a second level signal at the second output terminal when the second sampled electrical signal is greater than the second reference electrical signal; The first level signal is used to indicate the fault signal.

7. The aerosol generating device according to claim 6, wherein The reference voltage generation module includes: a first resistor, a second resistor, a third resistor, and a fourth resistor; One end of the first resistor is connected to a DC voltage source, and the other end of the first resistor is grounded through the second resistor. A first connection node is formed between the first resistor and the second resistor; the first reference input terminal is connected to the first connection node; One end of the third resistor is connected to the DC voltage source, and the other end of the third resistor is grounded through the fourth resistor. A second connection node is formed between the third resistor and the fourth resistor; the second reference input terminal is connected to the second connection node.

8. The aerosol generating device according to claim 3, characterized in that, The logic gate circuit includes: a logic gate, and the logic gate is an AND gate.

9. The aerosol generating device according to any one of claims 6-8, characterized in that, The voltage level of the first level signal is less than that of the second level signal.

10. The aerosol generating device according to claim 6, characterized in that, The controller includes: a reset pin; Both the first output terminal and the second output terminal are connected to the reset pin; The reset pin is configured to: when a first level signal is formed at the first output terminal and / or a first level signal is formed at the second output terminal, receive the first level signal so that the controller is reset according to the first level signal.

11. A control method for an aerosol generating device, characterized in that, Comprising: Obtain a sampling signal; Determine whether the sampling signal meets a preset fault detection condition; When the sampling signal meets the fault detection condition, generate a fault signal; Provide the fault signal to the controller of the aerosol generating device to reset the controller; and When generating the fault signal, control the switch circuit of the aerosol generating device to disconnect the power output loop; the power output loop is jointly formed by the switch circuit and the heating element of the aerosol generating device.

12. The control method according to claim 11, wherein The sampling signal includes: a first sampling electrical signal and a second sampling electrical signal; Wherein, the first sampling electrical signal is obtained by converting the output current of the power output loop of the aerosol generating device; the second sampling electrical signal is obtained by converting the temperature information of the heating element; The determination of whether the sampling signal meets the preset fault detection condition specifically includes: Determine whether the first sampling electrical signal is greater than a preset first reference electrical signal; Determine whether the second sampling electrical signal is less than a preset second reference electrical signal; Wherein, when the first sampling electrical signal is greater than the first reference electrical signal, or the second sampling electrical signal is less than the second reference electrical signal, the fault signal is generated.

13. The control method according to claim 11, wherein The control of disconnecting the power output loop of the aerosol generating device by the switch circuit when generating the fault signal; the power output loop is jointly formed by the switch circuit and the heating element, specifically includes: When the fault signal is not received, control the switch circuit to conduct and disconnect alternately through a control signal; the control signal is a periodic square wave signal; When the fault signal is received, keep the switch circuit in the off state.

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