Control circuit and aerosol generating device

Abstract

The utility model discloses a control circuit and an aerosol generating device. The control circuit comprises a power supply circuit; a controller including a plurality of output ports for outputting enable signals; the switching circuit has a plurality of different switching states and is configured to be capable of sending corresponding output signals to the controller according to the switching states; each switching circuit is electrically connected between the power supply circuit and the corresponding heating element, and the switching circuits are connected with the corresponding output ports so as to receive the enable signals; a trigger circuit configured to send a trigger signal to the controller in response to the trigger action; wherein the controller is configured to selectively activate one or more output ports based on the output signals, and output enable signals to the corresponding switching circuits through the activated output ports based on the trigger signals, so as to control the on or off of the switching circuits. Therefore, according to the embodiment of the invention, the control modes of the heating element can be increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic atomization, in particular to a control circuit and an aerosol generating device. BACKGROUND

[0002] An aerosol generating device includes a liquid storage cavity, and an aerosol is generated by heating an aerosol-forming substrate in the liquid storage cavity. The aerosol-forming substrate can be a liquid substrate, for example, including glycerol, propylene glycol, nicotine salt or other functional ingredients.

[0003] In an example of the prior art, an aerosol generating device includes a battery, two or more liquid storage cavities for storing different substrate components, and a heating element arranged in each liquid storage cavity. The two or more liquid storage cavities for storing different substrate components are controlled by gating the current loop of the battery and the heating element in each liquid storage cavity. However, the above-mentioned method can only perform single-shot control, lacks multi-shot control mode, and thus cannot realize mixing of different substrate components in the two or more liquid storage cavities, reduces the flavor function of the aerosol generating device, and reduces the user experience. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to provide a control circuit and an aerosol generating device, which can control only one heating element to start working and can also control at least two heating elements to start working at the same time, thereby increasing the control mode of two or more heating elements and further increasing the flavor function of the aerosol generating device and improving the user experience.

[0005] In a first aspect, an embodiment of the present application provides a control circuit of an aerosol generating device, the aerosol generating device including two or more heating elements, and the control circuit including:

[0006] a power supply circuit configured to provide power supply for the heating elements;

[0007] a controller electrically connected to the power supply circuit and the heating elements, respectively, the controller including a plurality of output ports configured to output an enable signal;

[0008] a switching circuit electrically connected between the power supply circuit and the controller, the switching circuit having a plurality of different switching states, and the switching circuit being configured to send a corresponding output signal to the controller according to the switching state;

[0009] two or more switching circuits, each of the switching circuits being electrically connected between the power supply circuit and a corresponding heating element, and the switching circuit being connected to a corresponding output port to receive an enable signal;

[0010] A trigger circuit electrically connected with the power supply circuit and the controller respectively, the trigger circuit configured to send a trigger signal to the controller in response to a trigger action;

[0011] The controller is configured to selectively activate one or more of the output ports based on the output signal, and configured to output an enable signal to the corresponding switch circuit through the activated output port based on the trigger signal, so as to control the switch circuit to be turned on or turned off.

[0012] In some embodiments, the output signal includes an output voltage, and the controller is further configured to select to activate one or more of the output ports according to the voltage level of the output voltage.

[0013] In some embodiments, the output voltage includes at least a first output voltage and a second output voltage, and the controller is further configured to activate only one of the output ports when the first output voltage is received, so as to enable the corresponding one of the heat generating elements to start working; and activate at least two output ports when the second output voltage is received, so as to enable the corresponding at least two of the heat generating elements to start working simultaneously.

[0014] In some embodiments, the switching circuit includes:

[0015] A toggle switch electrically connected with the controller;

[0016] A voltage dividing circuit electrically connected between the power supply circuit and a ground terminal, and electrically connected with the toggle switch, the voltage dividing circuit having an output node corresponding to the switching state, and the voltage dividing circuit is configured to send an output voltage of the corresponding output node to the controller according to the switching state of the toggle switch.

[0017] In some embodiments, the output signal includes a switch signal, and the switch signal includes at least a first switch signal and a second switch signal, and the controller is further configured to activate only one of the output ports when the first switch signal is received, so as to enable the corresponding one of the heat generating elements to start working; and activate at least two output ports when the second switch signal is received, so as to enable the corresponding at least two of the heat generating elements to start working simultaneously.

[0018] In some embodiments, the switching circuit includes a pull-up resistor and a dip switch, and the number of dip keys of the dip switch is the same as the number of the heat generating elements.

[0019] One end of each of the dial keys is electrically connected to the power supply circuit through a corresponding pull-up resistor and electrically connected to the controller, and the other end of each of the dial keys is grounded. The dial switch is configured to output a switch signal to the controller according to a switch state combination of its dial keys, wherein each of the switch state combinations corresponds to a switching state of the switching circuit.

[0020] In some embodiments, the dial switch includes:

[0021] a common contact electrically connected to the controller;

[0022] a number of active contacts greater than the number of heating elements, the active contacts being respectively electrically connected to corresponding output nodes.

[0023] In some embodiments, the aerosol-generating device includes two heating elements, the dial switch includes a common contact, a first active contact, a second active contact, and a third active contact, and the voltage dividing circuit includes a first resistor and a second resistor connected in series, the voltage dividing circuit having a first output node, a second output node, and a third output node corresponding to a switching state of the dial switch;

[0024] wherein the first output node is located between the power supply circuit and the first resistor and is electrically connected to the first active contact, the second output node is located between the first resistor and the second resistor and is electrically connected to the second active contact, and the third output node is located between the second resistor and a ground terminal and is electrically connected to the third active contact.

[0025] In some embodiments, the aerosol-generating device includes three heating elements, the switching circuit includes a first pull-up resistor, a second pull-up resistor, a third pull-up resistor, and a dial switch, and the dial switch includes a first dial key, a second dial key, and a third dial key;

[0026] wherein one end of the first dial key is electrically connected to the power supply circuit through the first pull-up resistor, one end of the second dial key is electrically connected to the power supply circuit through the second pull-up resistor, one end of the third dial key is electrically connected to the power supply circuit through the third pull-up resistor, and one end of the first dial key, the second dial key, and the third dial key is respectively electrically connected to the controller; the other end of the first dial key, the second dial key, and the third dial key is grounded.

[0027] In some embodiments, the switch circuit comprises a third resistor, a fourth resistor and an NMOS transistor; the third resistor is electrically connected between the controller and the gate of the NMOS transistor, the fourth resistor is electrically connected between the gate of the NMOS transistor and a ground terminal, the source of the NMOS transistor is grounded, and the drain of the NMOS transistor is electrically connected with the corresponding heating element.

[0028] In some embodiments, the trigger circuit comprises an airflow sensor and / or a touch switch.

[0029] In some embodiments, further comprising a display circuit electrically connected between the power supply circuit and the controller, the display circuit being configured to indicate the working state of the aerosol generating device.

[0030] In some embodiments, further comprising a charging circuit electrically connected to the controller, the charging circuit being configured to provide a charging voltage to the power supply circuit through an external power source.

[0031] In a second aspect, the embodiments of the present application provide an aerosol generating device comprising the control circuit according to any one of the above embodiments.

[0032] In a third aspect, the embodiments of the present application provide a control method of an aerosol generating device, the aerosol generating device comprising two or more heating elements and a power supply circuit configured to provide power to the heating elements, the control method comprising:

[0033] receiving an output signal of a switching circuit, the switching circuit having a plurality of different switching states;

[0034] selectively activating one or more output ports configured to output an enable signal according to the output signal corresponding to the different switching states respectively;

[0035] receiving a trigger signal generated by a trigger circuit in response to a trigger action, and outputting the enable signal to a corresponding switch circuit through the activated output port based on the trigger signal, so as to turn on or turn off a current path between the heating element and the power supply circuit by the switch circuit.

[0036] The application has at least the following beneficial effects: by setting the aerosol generating device to include two or more heating elements, a power supply circuit, a switching circuit, a switching circuit, a triggering circuit and a controller, the controller includes a plurality of output ports for outputting an enable signal, each switching circuit is electrically connected between the power supply circuit and the corresponding heating element, and is electrically connected to the corresponding output port, the switching circuit is configured to send a corresponding output signal to the controller according to its different switching states, the triggering circuit is configured to send a trigger signal to the controller in response to a triggering action, the controller is configured to selectively activate one or more output ports based on the output signal, and output the enable signal to the corresponding switching circuit through the activated output port based on the trigger signal, thereby controlling the on or off. Therefore, the application can control only one heating element to start working, and can also control at least two heating elements to start working at the same time, thereby increasing the control mode of two or more heating elements, and further increasing the taste function of the aerosol generating device and improving the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0037] One or more embodiments are illustrated by way of example in the drawings that are not intended to be limiting of the embodiments. Like references numerals in the drawings denote like elements, unless otherwise specified. The drawings in which:

[0038] Figure 1 A structural schematic diagram of a control circuit of an aerosol generating device provided by an embodiment of the application;

[0039] Figure 2 A structural schematic diagram of a switching circuit provided by an embodiment of the application;

[0040] Figure 3 A structural schematic diagram of another switching circuit provided by an embodiment of the application;

[0041] Figure 4 A structural schematic diagram of a controller of an aerosol generating device provided by an embodiment of the application, the aerosol generating device including two heating elements;

[0042] Figure 5 A structural schematic diagram of a controller of an aerosol generating device provided by an embodiment of the application, the aerosol generating device including two heating elements, Figure 2 A circuit connection schematic diagram of a switching circuit of the aerosol generating device;

[0043] Figure 6 A circuit connection schematic diagram of two switching circuits of an aerosol generating device provided by an embodiment of the application, the aerosol generating device including two heating elements;

[0044] Figure 7A structure diagram of a control circuit of an aerosol generating device provided by an embodiment of the present application;

[0045] Figure 8 An aerosol generating device provided by an embodiment of the present application includes three heating elements, Figure 3 A structure diagram of a switching circuit of the aerosol generating device;

[0046] Figure 9 An aerosol generating device provided by an embodiment of the present application includes three heating elements,

[0047] Figure 10 A structure diagram of a control circuit of another aerosol generating device provided by an embodiment of the present application;

[0048] Figure 11 A structure diagram of a display circuit of the aerosol generating device provided by an embodiment of the present application; Figure 10

[0049] Figure 12 A structure diagram of an aerosol generating device provided by an embodiment of the present application;

[0050] Figure 13 A flowchart of a control method of an aerosol generating device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0051] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0052] It should be noted that the present application is applicable to an aerosol generating device including two or more heating elements. The control circuit provided by the embodiments of the present application is used to switch and control two or more heating elements in the aerosol generating device, specifically including controlling only one heating element to start working and controlling at least two heating elements to start working at the same time, so as to meet the needs of users for multiple tastes or mixed tastes of the aerosol generating device.

[0053] ​As one of the examples, the aerosol generating device is a dual or multi-cartridge electronic cigarette, each atomization cartridge including a liquid storage cavity for storing an aerosol forming substrate and a heating element for heating the aerosol forming substrate in the liquid storage cavity in any existing heating manner to generate a smokeable aerosol. The control circuit provided by the embodiments of the present application controls the switching of the heating elements of different atomization cartridges, thereby enabling the selection of the heating circuit of one or more atomization cartridges and realizing the switching of the atomization cartridges. If the heating circuit of one atomization cartridge is selected, and at least two atomization cartridges of the electronic cigarette store aerosol forming substrates of different substrate compositions, the switching of the atomization cartridges can realize the switching of different flavors. If the heating circuit of at least two atomization cartridges is selected, and at least two atomization cartridges of the electronic cigarette store aerosol forming substrates of different substrate compositions, the switching of the atomization cartridges can realize the mixing of different flavors.

[0054] Please refer to Figure 1 , a structural schematic diagram of a control circuit of an aerosol generating device provided by the embodiments of the present application. As Figure 1 indicated, the aerosol generating device includes two or more heating elements 11, and the control circuit 100 includes a power supply circuit 12, a controller 13, a switching circuit 14, two or more switching circuits 15, and a trigger circuit 16.

[0055] The power supply circuit 12 is configured to provide power for the heating elements 11.

[0056] The power supply circuit 12 includes a battery, which provides power for the heating elements 11 and also serves as the power supply for the control circuit 100. As Figure 4 , Figure 5 , Figure 7 , Figure 8 and Figure 11 indicated, the battery is configured to output a power supply voltage B+.

[0057] The battery is a rechargeable battery, which can be charged to supplement its power when its power is reduced or depleted. It can be understood that it can also use a disposable battery. The battery can be any suitable power source, such as a DC source, for example, a battery. In one example, the battery is a lithium-ion battery. Alternatively, the battery can be a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery, such as a lithium cobalt, lithium iron phosphate, lithium titanate, or lithium polymer battery.

[0058] Optionally, the power supply circuit 12 further includes a protection circuit electrically connected to the battery, which protects the battery. For example, the protection circuit is electrically connected between the positive and negative electrodes of the battery, and the protection circuit includes a lithium protection chip and its peripheral circuit.

[0059] The controller 13 is electrically connected with the power supply circuit 12 and the heating element 11 respectively, and the controller 13 comprises a plurality of output ports 131 for outputting an enable signal.

[0060] As shown in Figure 4 , the controller 13 comprises a control chip U1 and its peripheral circuit, and the control chip U1 comprises two output ports 131 for outputting an enable signal. The control chip U1 comprises a VDD pin, a KEY pin, a MIC pin, an SS1 pin, an OUT+ pin, an O1 pin and an O2 pin, wherein the O1 pin and the O2 pin are two output ports 131 of the control chip U1 for outputting an enable signal. The peripheral circuit thereof comprises a resistor R1 and a capacitor C1, the resistor R1 is electrically connected between the VDD pin and the power supply circuit 12, and the capacitor C1 is electrically connected between the VDD pin and the ground terminal.

[0061] As shown in Figure 7 , the controller 13 comprises a control chip U2 and its peripheral circuit, and the control chip U2 comprises three output ports 131 for outputting an enable signal. The control chip U2 comprises a MOTOR pin, a VDD pin, a KEY pin, a MIC pin, an SS1 pin, an SS2 pin, an SS3 pin, an OUT+ pin, an O1 pin, an O2 pin and an O3 pin, wherein the O1 pin, the O2 pin and the O3 pin are three output ports 131 of the control chip U1 for outputting an enable signal. Compared with the peripheral circuit of Figure 4 , the peripheral circuit thereof further comprises a resistor R2, and the resistor R2 is electrically connected between the MOTOR pin and the power supply circuit 12.

[0062] In some embodiments, the controller 13 can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), a single chip microcomputer, an ARM (Acorn RISC Machine), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of these components. In addition, the controller 13 can also be any conventional processor, controller, microcontroller or state machine. The control unit 11 can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in combination with a DSP, and / or any other such configuration.

[0063] The switching circuit 14 is electrically connected between the power supply circuit 12 and the controller 13, and the switching circuit 14 has a plurality of different switching states, and the switching circuit 14 is configured to be able to send a corresponding output signal to the controller 13 according to the switching state.

[0064] In some embodiments, the output signal comprises an output voltage, and the controller 13 is further configured to select to activate one or more output ports 131 according to the voltage size of the output voltage.

[0065] Specifically, the output voltage includes at least a first output voltage and a second output voltage, the controller 13 is further configured to activate only one of the output ports 131 when receiving the first output voltage, so that the corresponding one of the heating elements 11 can start to work; and activate at least two of the output ports 131 when receiving the second output voltage, so that the corresponding at least two of the heating elements 11 can start to work at the same time.

[0066] As shown in Figure 2 , the switching circuit 14 includes a toggle switch 141 and a voltage dividing circuit 142.

[0067] The toggle switch 141 is electrically connected to the controller 13.

[0068] The toggle switch 141 includes a common contact and a plurality of movable contacts. The common contact is electrically connected to the controller 13. The number of the movable contacts is at least one more than the number of the heating elements 11, and the movable contacts are respectively electrically connected to the corresponding output nodes (not shown in Figure 2 ).

[0069] The voltage dividing circuit 142 is electrically connected between the power supply circuit 12 and the ground terminal, and is electrically connected to the toggle switch 141. The voltage dividing circuit 142 has output nodes corresponding to the switching states, and is configured to send the output voltage of the corresponding output node to the controller 13 according to the switching state of the toggle switch 141.

[0070] It can be seen that the number of output voltages is equal to the switching states of the toggle switch 141. As shown in Figure 5 , the toggle switch 141 includes a common contact S1a, a first movable contact S1b, a second movable contact S1c and a third movable contact S1d. The movable contacts correspond to the switching states of the toggle switch 141, and the toggle switch 141 has three switching states. The voltage dividing circuit 142 includes a first resistor R3 and a second resistor R4 connected in series, and has a first output node 142a, a second output node 142b and a third output node 142c corresponding to the switching states of the toggle switch S1. The first output node 142a is located between the power supply circuit 12 and the first resistor R3, and is electrically connected to the first movable contact S1b. The second output node 42b is located between the first resistor R3 and the second resistor R4, and is electrically connected to the second movable contact S1c. The third output node 142c is located between the second resistor R4 and the ground terminal, and is electrically connected to the third movable contact S1d.

[0071] In some embodiments, the output signal includes a switch signal, the switch signal at least includes a first switch signal and a second switch signal, the controller 13 is further configured to activate only one of the output ports 131 when receiving the first switch signal, so as to enable the corresponding one of the heat generating elements 11 to start working; and activate at least two of the output ports 131 when receiving the second switch signal, so as to enable the corresponding at least two of the heat generating elements 11 to start working simultaneously.

[0072] As shown in Figure 3 , the switching circuit 14 includes a pull-up resistor 143 and a DIP switch 144, the number of DIP keys 1441 of the DIP switch 144 is the same as the number of the heat generating elements 11.

[0073] Wherein, one end of each DIP key 1441 is electrically connected to the power supply circuit 12 through a corresponding pull-up resistor 143, and is electrically connected to the controller 13, the other end of each DIP key 1441 is grounded, and the DIP switch 14 is configured to output a switch signal to the controller 13 according to the switch state combination of its DIP keys 1441, wherein each switch state combination corresponds to a switching state of the switching circuit 14.

[0074] As shown in Figure 8 , the switching circuit 14 includes a first pull-up resistor R5, a second pull-up resistor R6, a third pull-up resistor R7 and a DIP switch S2, the DIP switch S2 includes a first DIP key 1441a, a second DIP key 1441b and a third DIP key 1441c. Wherein, one end of the first DIP key 1441a is electrically connected to the power supply circuit 12 through the first pull-up resistor R5, and is electrically connected to the pin SS1 of the control chip U2, the other end of the first DIP key 1441a is grounded. One end of the second DIP key 1441b is electrically connected to the power supply circuit 12 through the second pull-up resistor R6, and is electrically connected to the pin SS2 of the control chip U2, the other end of the second DIP key 1441b is grounded. One end of the third DIP key 1441c is electrically connected to the power supply circuit 12 through the third pull-up resistor R7, and is electrically connected to the pin SS3 of the control chip U2, the other end of the third DIP key 1441c is grounded. Each switch circuit 15 is electrically connected between the power supply circuit 12 and the corresponding heat generating element 11, and the switch circuit 15 is connected to the corresponding output port 131 to receive the enable signal.

[0075] In the embodiments of the present application, each switch circuit 15 adopts the same circuit structure, for example, Figure 6 As shown in Figure 9 , the switch circuit 15a, the switch circuit 15b and the switch circuit 15c adopt the same circuit structure. In other embodiments, the circuit structures between at least two switch circuits 15 can be set differently.

[0076] by Figure 6 Taking the switch circuit 15a shown as an example, the switch circuit 15a includes a third resistor R8, a fourth resistor R9, and an NMOS transistor Q1. The third resistor R8 is electrically connected between the controller 13 (pin O1 of the control chip U1) and the gate of the NMOS transistor Q1. The fourth resistor R9 is electrically connected between the gate of the NMOS transistor Q1 and the ground terminal. The source of the NMOS transistor Q1 is grounded, and the drain of the NMOS transistor Q1 is electrically connected to the corresponding heating element 11a.

[0077] Taking the switching circuit 15a as an example, the switching circuit 15a can also use switching transistors such as PMOS transistors, transistors, IGBT transistors, and power MOSFETs. When the switching circuit 15a uses a PMOS transistor, the heating element 11a is connected in series between the source and ground of the PMOS transistor. The drain of the PMOS transistor is electrically connected to the power supply circuit 12 to receive the power supply voltage B+ provided by the power supply circuit 12, or electrically connected to the controller 13 to receive the power drive signal output by the controller 13.

[0078] It is understood that the switching circuit 15 may also include switches such as NMOS transistors, PMOS transistors, transistors, IGBT transistors, and power MOSFETs integrated inside the control chip U1 or control chip U2, which are configured to generate power drive signals and output from the OUT+ pin of the control chip U1 or control chip U2.

[0079] The trigger circuit 16 is electrically connected to the power supply circuit 12 and the controller 13 respectively, and the trigger circuit 16 is configured to send a trigger signal to the controller 13 in response to a triggering action.

[0080] The trigger circuit 16 includes an airflow sensor and / or a tactile switch.

[0081] The first terminal of the airflow sensor is electrically connected to the VDD pin of control chip U1 or control chip U2, the second terminal of the airflow sensor is grounded, and the third terminal of the airflow sensor is electrically connected to the MIC pin of control chip U1 or control chip U2. In some embodiments, a filter capacitor may be provided between the first and second terminals of the airflow sensor. The airflow sensor is configured to send a trigger signal to the MIC pin of control chip U1 or control chip U2 in response to a suction action.

[0082] The tactile switch is electrically connected between the power supply circuit 12 and the ground terminal. The end of the tactile switch connected to the power supply circuit 12 is also electrically connected to the KEY pin of control chip U1 or control chip U2. In some embodiments, a current-limiting resistor may be provided between the power supply circuit 12 and the tactile switch. The tactile switch is configured to send a trigger signal to the KEY pin of control chip U1 or control chip U2 in response to a button press.

[0083] The controller 13 is configured to selectively activate one or more output ports 131 based on the output signal, and is configured to output the enable signal to the corresponding switch circuit 15 through the activated output port 131 based on the trigger signal, so as to control the switch circuit 15 to be turned on or turned off.

[0084] It should be noted that the time sequence of the controller 13 receiving the trigger signal, the output signal, and controlling the switch circuit 15 to be turned on or turned off can be interchanged, and at least includes the following cases:

[0085] The controller 13 receives the output signal, selectively activates one or more output ports 131 based on the output signal, then receives the trigger signal, and outputs the enable signal to the corresponding switch circuit 15 through the activated output port 131 based on the trigger signal, so as to control the switch circuit 15 to be turned on or turned off.

[0086] The controller 13 receives the output signal, selectively activates one or more output ports 131 based on the output signal, and outputs the enable signal to the corresponding switch circuit 15 through the activated output port 131, so as to control the switch circuit 15 to be turned on or turned off, and then receives the trigger signal.

[0087] The controller 13 receives the trigger signal, then receives the output signal, selectively activates one or more output ports 131 based on the output signal, and outputs the enable signal to the corresponding switch circuit 15 through the activated output port 131, so as to control the switch circuit 15 to be turned on or turned off.

[0088] In an embodiment, the output port 131 is in a dormant state, and the controller 13 is configured to selectively activate one or more output ports 131 based on the output signal. The activated output port 131 can output the enable signal.

[0089] In an embodiment, the output port 131 is configured with an initial level, and the controller 13 is configured to selectively activate one or more output ports 131 based on the output signal. The activated output port 131 changes the initial level. For example, the initial level of the output port 131 is low, and the activated output port 131 changes from low to high. For example, the initial level of the output port 131 is high, and the activated output port 131 changes from high to low.

[0090] As one of the embodiment modes, the heating element 11 is connected in series on the current loop of the controller 13 and the switch circuit 15. By turning on or turning off the switch circuit 15, the current path between one heating element 11 and the controller 13 can be selected, so as to realize the start of only one heating element 11. At least two heating elements 11 and the controller 13 can also be selected, so as to realize the simultaneous start of at least two heating elements 11.

[0091] As one of the embodiments, the heating element 11 is connected in series on the current loop of the power supply circuit 12 and the switch circuit 15, and by turning on or off the switch circuit 15, the current path between one heating element 11 and the power supply circuit 12 can be selected, so that only one heating element starts to work, or the current path between at least two heating elements 11 and the power supply circuit 12 can be selected, so that at least two heating elements start to work at the same time.

[0092] Please refer to Figures 4-6 Taking the aerosol generating device including two heating elements 11 (heating element 11a and heating element 11b) as an example, the controller 13 includes a control chip U1, the pin SS1 of the control chip U1 is electrically connected to Figure 5 the port SS1 of the switch circuit 14 shown in the figure, the pin O1 of the control chip U1 is electrically connected to Figure 6 the port O1 of the switch circuit 15a shown in the figure, and the pin O2 of the control chip U1 is electrically connected to Figure 6 the port O2 of the switch circuit 15b shown in the figure.

[0093] In an embodiment, the resistance values of the first resistor R3 and the second resistor R4 are equal. Figures 4-6 The working principle of the switch circuit 14 is as follows:

[0094] When the switch 141 is turned to connect the common contact S1a and the first movable contact S1b, so that the first output node 142a, the first movable contact S1b and the common contact S1a form a loop, at this time, the first output node 142a outputs the power supply voltage B+, and sends it to the pin SS1 of the control chip U1. Further, when the pin KEY or the pin MIC of the control chip U1 receives a trigger signal, in an example, the pin KEY of the control chip U1 detects a low-level signal, activates the pin O1 of the control chip U1, and outputs a high-level signal from the pin O1 of the control chip U1 to the switch circuit 15a, which meets the conduction condition of the NMOS tube Q1, and the NMOS tube Q1 is turned on. The pin O2 of the control chip U1 outputs a low-level signal to the switch circuit 15b, which does not meet the conduction condition of the NMOS tube Q2, and the NMOS tube Q2 remains in the off state; the power MOS integrated inside the control chip U1 is turned on, the pin OUT+ of the control chip U1 outputs a power driving signal, and the power driving signal is sent to the positive electrode 11a+ of the heating element 11a and the positive electrode 11b+ of the heating element 11b. At this time, the power driving signal passes through the positive electrode 11a+ of the heating element 11a, the negative electrode 11a- of the heating element 11a, the NMOS tube Q1 to the ground, so that the heating element 11a starts to work.

[0095] When the toggle switch 141 connects the common contact S1a and the second active contact S1c, the second output node 142b, the second active contact S1c and the common contact S1a form a loop, at this time, the second output node 142b outputs 1 / 2 power supply voltage B+ and sends to the pin SS1 of the control chip U1. Further, when the pin KEY or the pin MIC of the control chip U1 receives a trigger signal, in an example, the pin KEY of the control chip U1 detects a low-level signal, activates the pin O1 and the pin O2 of the control chip U1, and outputs a high-level signal from the pin O1 of the control chip U1 to the switch circuit 15a, which meets the conduction condition of the NMOS tube Q1, and the NMOS tube Q1 is turned on; a high-level signal is output from the pin O2 of the control chip U1 to the switch circuit 15b, which meets the conduction condition of the NMOS tube Q2, and the NMOS tube Q2 is turned on; the power MOS integrated inside the control chip U1 is turned on, the pin OUT+ of the control chip U1 outputs a power driving signal, and the power driving signal is sent to the positive electrode 11a+ of the heating element 11a and the positive electrode 11b+ of the heating element 11b, at this time, the power driving signal passes through the positive electrode 11a+ of the heating element 11a, the negative electrode 11a- of the heating element 11a, the NMOS tube Q1 to the ground, so that the heating element 11a starts to work, and at the same time, the power driving signal passes through the positive electrode 11b+ of the heating element 11b, the negative electrode 11b- of the heating element 11b, the NMOS tube Q2 to the ground, so that the heating element 11b starts to work, therefore, the heating element 11a and the heating element 11b start to work at the same time.

[0096] When the toggle switch 141 connects the common contact S1a and the third active contact S1d, the third output node 142c, the third active contact S1d and the common contact S1a form a loop, at this time, the third output node 142c outputs 0V voltage and sends to the pin SS1 of the control chip U1. Further, when the pin KEY or the pin MIC of the control chip U1 receives a trigger signal, in an example, the pin KEY of the control chip U1 detects a low-level signal, activates the pin O2 of the control chip U1, and outputs a high-level signal from the pin O2 of the control chip U1 to the switch circuit 15b, which meets the conduction condition of the NMOS tube Q2, and the NMOS tube Q2 is turned on; the pin O1 of the control chip U1 outputs a low-level signal to the switch circuit 15a, which does not meet the conduction condition of the NMOS tube Q1, and the NMOS tube Q1 remains in the off state; the power MOS integrated inside the control chip U1 is turned on, the pin OUT+ of the control chip U1 outputs a power driving signal, and the power driving signal is sent to the positive electrode 11a+ of the heating element 11a and the positive electrode 11b+ of the heating element 11b, at this time, the power driving signal passes through the positive electrode 11b+ of the heating element 11b, the negative electrode 11b- of the heating element 11b, the NMOS tube Q2 to the ground, so that the heating element 11b starts to work.

[0097] Please refer to Figures 7-9 Taking the example that the aerosol generating device includes three heating elements 11 (heating element 11a, heating element 11b and heating element 11c), on the basis of the above-mentioned embodiment, the heating element 11c and the switch circuit 15c corresponding to the heating element 11c are added. The controller 13 includes a control chip U2, a pin SS1 of the control chip U2 is electrically connected to Figure 8 the port SS1 of the switch circuit 14 shown in the figure, a pin SS2 of the control chip U2 is electrically connected to Figure 8 the port SS2 of the switch circuit 14 shown in the figure, a pin SS3 of the control chip U2 is electrically connected to Figure 8 the port SS3 of the switch circuit 14 shown in the figure, a pin O1 of the control chip U2 is electrically connected to Figure 9 the port O1 of the switch circuit 15a shown in the figure, a pin O2 of the control chip U2 is electrically connected to Figure 9 the port O2 of the switch circuit 15a shown in the figure, a pin O3 of the control chip U2 is electrically connected to Figure 9 the port O3 of the switch circuit 15a shown in the figure.

[0098] The first dial button 1441a, the second dial button 1441b and the third dial button 1441c have seven outputs, that is, have seven different switching states. Figures 7-9 The working principle of the above-mentioned embodiment is as follows:

[0099] When the first dial button 1441a is dialed to OFF, the second dial button 1441b is dialed to ON, and the third dial button 1441c is dialed to ON, the ports SS1-SS3 of the dial switch S2 output 100 and send to the pins SS1-SS3 of the control chip U2. Further, when the pin KEY or the pin MIC of the control chip U2 receives a trigger signal, in an example, the pin KEY of the control chip U2 detects a low-level signal, activates the pin O1 of the control chip U2, and outputs a high-level signal from the pin O1 of the control chip U2 to the switch circuit 15a, which meets the conduction condition of the NMOS tube Q1, the NMOS tube Q1 is turned on, the pin O2 of the control chip U2 outputs a low-level signal to the switch circuit 15b, which does not meet the conduction condition of the NMOS tube Q2, the NMOS tube Q2 remains in the off state, the pin O3 of the control chip U2 outputs a low-level signal to the switch circuit 15c, which does not meet the conduction condition of the NMOS tube Q3, the NMOS tube Q3 remains in the off state; the power MOS integrated inside the control chip U2 is turned on, the pin OUT+ of the control chip U2 outputs a power driving signal, and the power driving signal is sent to the positive electrode 11a+ of the heating element 11a, the positive electrode 11b+ of the heating element 11b, and the positive electrode 11c+ of the heating element 11c. At this time, the power driving signal passes through the positive electrode 11a+ of the heating element 11a, the negative electrode 11a- of the heating element 11a, the NMOS tube Q1 to the ground, so that the heating element 11a starts to work.

[0100] When the first dial button 1441a is dialed to ON, the second dial button 1441b is dialed to OFF, and the third dial button 1441c is dialed to ON, the ports SS1-SS3 of the dial switch S2 output 010 and send to the pins SS1-SS3 of the control chip U2. Further, when the pin KEY or the pin MIC of the control chip U2 receives a trigger signal, in an example, the pin KEY of the control chip U2 detects a low-level signal, activates the pin O2 of the control chip U2, and the pin O1 of the control chip U2 outputs a low-level signal to the switch circuit 15a, which does not meet the conduction condition of the NMOS tube Q1, and the NMOS tube Q1 remains off. A high-level signal is output from the pin O2 of the control chip U2 to the switch circuit 15b, which meets the conduction condition of the NMOS tube Q2, and the NMOS tube Q2 is turned on. The pin O3 of the control chip U2 outputs a low-level signal to the switch circuit 15c, which meets the conduction condition of the NMOS tube Q3, and the NMOS tube Q3 remains off; the power MOS integrated inside the control chip U2 is turned on, the pin OUT+ of the control chip U2 outputs a power driving signal, and the power driving signal is sent to the positive electrode 11a+ of the heating element 11a, the positive electrode 11b+ of the heating element 11b, and the positive electrode 11c+ of the heating element 11c. At this time, the power driving signal passes through the positive electrode 11b+ of the heating element 11b, the negative electrode 11b- of the heating element 11b, the NMOS tube Q2 to the ground, so that the heating element 11b starts to work.

[0101] When the first dial button 1441a is dialed to ON, the second dial button 1441b is dialed to ON, and the third dial button 1441c is dialed to OFF, the ports SS1-SS3 of the dial switch S2 output 001 and send to the pins SS1-SS3 of the control chip U2. Further, when the pin KEY or the pin MIC of the control chip U2 receives a trigger signal, in an example, the pin KEY of the control chip U2 detects a low-level signal, activates the pin O3 of the control chip U2, and the pin O1 of the control chip U2 outputs a low-level signal to the switch circuit 15a, which does not meet the conduction condition of the NMOS tube Q1, and the NMOS tube Q1 remains in an off state. The pin O2 of the control chip U2 outputs a low-level signal to the switch circuit 15b, which does not meet the conduction condition of the NMOS tube Q2, and the NMOS tube Q2 remains in an off state. The pin O3 of the control chip U2 outputs a high-level signal to the switch circuit 15c, which meets the conduction condition of the NMOS tube Q3, and the NMOS tube Q3 is turned on; the power MOS integrated inside the control chip U2 is turned on, the pin OUT+ of the control chip U2 outputs a power driving signal, and the power driving signal is sent to the positive electrode 11a+ of the heating element 11a, the positive electrode 11b+ of the heating element 11b, and the positive electrode 11c+ of the heating element 11c. At this time, the power driving signal passes through the positive electrode 11c+ of the heating element 11c, the negative electrode 11c- of the heating element 11c, the NMOS tube Q3 to the ground, so that the heating element 11c starts to work.

[0102] When the first dial button 1441a is dialed to OFF, the second dial button 1441b is dialed to OFF, and the third dial button 1441c is dialed to ON, the ports SS1-SS3 of the dial switch S2 output 110 and send to the pins SS1-SS3 of the control chip U2. Further, when the pin KEY or the pin MIC of the control chip U2 receives a trigger signal, in an example, the pin KEY of the control chip U2 detects a low-level signal, activates the pin O1 and the pin O2 of the control chip U2, and outputs a high-level signal from the pin O1 of the control chip U2 to the switch circuit 15a, meets the conduction condition of the NMOS tube Q1, the NMOS tube Q1 is turned on, outputs a high-level signal from the pin O2 of the control chip U2 to the switch circuit 15b, meets the conduction condition of the NMOS tube Q2, the NMOS tube Q2 is turned on, the pin O3 of the control chip U2 outputs a low-level signal to the switch circuit 15c, does not meet the conduction condition of the NMOS tube Q3, and the NMOS tube Q3 remains in an off state; the power MOS integrated in the control chip U2 is turned on, the pin OUT+ of the control chip U2 outputs a power driving signal, and the power driving signal is sent to the positive electrode 11a+ of the heating element 11a, the positive electrode 11b+ of the heating element 11b, and the positive electrode 11c+ of the heating element 11c. At this time, the power driving signal passes through the positive electrode 11a+ of the heating element 11a, the negative electrode 11a- of the heating element 11a, the NMOS tube Q1 to the ground terminal, so that the heating element 11a starts to work, and the power driving signal passes through the positive electrode 11b+ of the heating element 11b, the negative electrode 11b- of the heating element 11b, the NMOS tube Q2 to the ground terminal, so that the heating element 11b starts to work. Therefore, the heating element 11a and the heating element 11b start to work at the same time.

[0103] When the first dial button 1441a is dialed to OFF, the second dial button 1441b is dialed to ON, and the third dial button 1441c is dialed to OFF, the ports SS1-SS3 of the dial switch S2 output 101 and send to the pins SS1-SS3 of the control chip U2. Further, when the pin KEY or the pin MIC of the control chip U2 receives a trigger signal, in an example, the pin KEY of the control chip U2 detects a low-level signal, activates the pin O1 and the pin O3 of the control chip U2, and outputs a high-level signal from the pin O1 of the control chip U2 to the switch circuit 15a, which meets the conduction condition of the NMOS tube Q1, the NMOS tube Q1 is turned on, the pin O2 of the control chip U2 outputs a low-level signal to the switch circuit 15b, which does not meet the conduction condition of the NMOS tube Q2, the NMOS tube Q2 remains in the off state, and a high-level signal is output from the pin O3 of the control chip U2 to the switch circuit 15c, which meets the conduction condition of the NMOS tube Q3, the NMOS tube Q3 is turned on; the power MOS integrated in the control chip U2 is turned on, the pin OUT+ of the control chip U2 outputs a power driving signal, and the power driving signal is sent to the positive electrode 11a+ of the heating element 11a, the positive electrode 11b+ of the heating element 11b, and the positive electrode 11c+ of the heating element 11c. At this time, the power driving signal passes through the positive electrode 11a+ of the heating element 11a, the negative electrode 11a- of the heating element 11a, the NMOS tube Q1 to the ground terminal, so that the heating element 11a starts to work, and the power driving signal passes through the positive electrode 11c+ of the heating element 11c, the negative electrode 11c- of the heating element 11c, the NMOS tube Q3 to the ground terminal, so that the heating element 11c starts to work. Therefore, the heating element 11a and the heating element 11c start to work at the same time.

[0104] When the first dial button 1441a is dialed to ON, the second dial button 1441b is dialed to OFF, and the third dial button 1441c is dialed to OFF, the ports SS1-SS3 of the dial switch S2 output 011 and send to the pins SS1-SS3 of the control chip U2. Further, when the pin KEY or the pin MIC of the control chip U2 receives a trigger signal, in an example, the pin KEY of the control chip U2 detects a low-level signal, activates the pin O2 and the pin O3 of the control chip U2, and the pin O1 of the control chip U2 outputs a low-level signal to the switch circuit 15a, which does not meet the conduction condition of the NMOS tube Q1, and the NMOS tube Q1 remains in an off state. The pin O2 of the control chip U2 outputs a high-level signal to the switch circuit 15b, which meets the conduction condition of the NMOS tube Q2, and the NMOS tube Q2 is turned on. The pin O3 of the control chip U2 outputs a high-level signal to the switch circuit 15c, which meets the conduction condition of the NMOS tube Q3, and the NMOS tube Q3 is turned on; the power MOS integrated inside the control chip U2 is turned on, the pin OUT+ of the control chip U2 outputs a power driving signal, and the power driving signal is sent to the positive electrode 11a+ of the heating element 11a, the positive electrode 11b+ of the heating element 11b, and the positive electrode 11c+ of the heating element 11c. At this time, the power driving signal passes through the positive electrode 11b+ of the heating element 11b, the negative electrode 11b- of the heating element 11b, the NMOS tube Q2 to the ground terminal, so that the heating element 11b starts to work. The power driving signal passes through the positive electrode 11c+ of the heating element 11c, the negative electrode 11c- of the heating element 11c, the NMOS tube Q3 to the ground terminal, so that the heating element 11c starts to work. Therefore, the heating element 11b and the heating element 11c start to work at the same time.

[0105] When the first DIP switch 1441a is switched to OFF, the second DIP switch 1441b is switched to OFF, and the third DIP switch 1441c is switched to OFF, the ports SS1-SS3 of the DIP switch S2 output 111 and send it to the pins SS1-SS3 of the control chip U2. Furthermore, when pin KEY or pin MIC of control chip U2 receives a trigger signal, in one example, pin KEY of control chip U2 detects a low-level signal, activating pins O1-O3 of control chip U2. A high-level signal is output from pin O1 of control chip U2 to switching circuit 15a, satisfying the conduction condition of NMOS transistor Q1, turning on NMOS transistor Q1. A high-level signal is output from pin O2 of control chip U2 to switching circuit 15b, satisfying the conduction condition of NMOS transistor Q2, turning on NMOS transistor Q2. A high-level signal is output from pin O3 of control chip U2 to switching circuit 15c, satisfying the conduction condition of NMOS transistor Q3, turning on NMOS transistor Q3. The power MOS integrated inside control chip U2 turns on, and pin OUT+ of control chip U2 outputs a power drive signal, power... A power drive signal is sent to the positive terminal 11a+ of heating element 11a, the positive terminal 11b+ of heating element 11b, and the positive terminal 11c+ of heating element 11c. At this time, the power drive signal passes through the positive terminal 11a+ of heating element 11a, the negative terminal 11a- of heating element 11a, and NMOS transistor Q1 to the ground terminal, causing heating element 11a to start working. The power drive signal passes through the positive terminal 11b+ of heating element 11b, the negative terminal 11b- of heating element 11b, and NMOS transistor Q2 to the ground terminal, causing heating element 11b to start working. The power drive signal passes through the positive terminal 11c+ of heating element 11c, the negative terminal 11c- of heating element 11c, and NMOS transistor Q3 to the ground terminal, causing heating element 11c to start working. Therefore, heating elements 11a, 11b, and 11c start working simultaneously.

[0106] like Figure 10 As shown, the control circuit 100 also includes a display circuit 17 electrically connected between the power supply circuit 12 and the controller 13. The display circuit 17 is used to indicate the operating status of the aerosol generating device. For example, the operating status of the aerosol generating device includes battery charging status, aerosol generating device power-on, aerosol generating device power-off, etc.

[0107] like Figure 11 As shown, the display circuit 17 includes an RGB indicator LED1, which has four pins. One pin of the RGB indicator LED1 is electrically connected to the power supply circuit 12 to receive the power supply voltage B+. The remaining three pins of the RGB indicator LED1 are electrically connected to the LED_B pin, LED_R pin, and LED_G pin of the control chip U1 or the control chip U2, respectively.

[0108] In some embodiments, the control circuit 100 further comprises a charging circuit 18 electrically connected to the controller 13, the charging circuit 18 being configured to provide a charging voltage to the power supply circuit 12 by an external power source. The charging circuit 18 comprises a USB interface and peripheral circuit electrically connected between the USB_IN pin and the ground terminal of the control chip U1 or the control chip U2.

[0109] In some embodiments, the control circuit 100 further comprises a communication interface electrically connected to the controller 13, the communication interface being configured to realize bidirectional data communication between an external device and the controller 13. For example, during the debugging process of the aerosol generating device, the communication interface is used to burn a debugging program into the control chip U1 or the control chip U2.

[0110] The control circuit provided by the embodiments of the present application comprises a power supply circuit, a switching circuit, a switch circuit, a trigger circuit, and a controller. The controller comprises a plurality of output ports for outputting an enable signal. Each switch circuit is electrically connected between the power supply circuit and a corresponding heating element, and is electrically connected to a corresponding output port. The switching circuit is configured to send a corresponding output signal to the controller according to different switching states thereof. The trigger circuit is configured to send a trigger signal to the controller in response to a trigger action. The controller is configured to selectively activate one or more output ports based on the output signal, and output the enable signal to the corresponding switch circuit through the activated output port based on the trigger signal, so as to control the switch circuit to turn on or turn off. Therefore, the embodiments of the present application can control only one heating element to start working, and can also control at least two heating elements to start working at the same time, thereby increasing the control mode of two or more heating elements, and further increasing the taste function of the aerosol generating device and improving the user experience.

[0111] Referring to Figure 12 , a structural schematic diagram of an aerosol generating device is provided. As Figure 12 shown, the aerosol generating device 200 comprises the control circuit 100 according to any one of the above embodiments. The aerosol generating device 200 further comprises two or more heating elements. The control circuit 100 is configured to control the two or more heating elements, so as to control only one heating element to start working, and to control at least two heating elements to start working at the same time.

[0112] Referring to Figure 13 , a flowchart of a control method of an aerosol generating device is provided. The aerosol generating device comprises two or more heating elements and a power supply circuit configured to provide power to the heating elements. As Figure 13 shown, the control method of the aerosol generating device comprises the following steps:

[0113] S10, receiving an output signal of a switching circuit, the switching circuit having a plurality of different switching states.

[0114] S20, selectively activating one or more output ports for outputting an enable signal according to the output signal corresponding to each of the different switching states.

[0115] S30, receiving a trigger signal generated by a trigger circuit in response to a trigger action, and outputting the enable signal to a corresponding switching circuit through the activated output port based on the trigger signal, so as to make the switching circuit turn on or off a current path between the heating element and the power supply circuit.

[0116] It can be understood that the detection method provided by the embodiments of the present application can be applied to any control circuit embodiment to produce the same beneficial effects, and the embodiments of the present application will not be described again.

[0117] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; under the idea of the present application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of the different aspects of the present application as described above. In order to be brief, they are not provided in details; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A control circuit of an aerosol generating device, characterized by, The aerosol generating device comprises two or more heating elements, and the control circuit comprises: a power supply circuit for providing power supply for the heating elements; a controller electrically connected with the power supply circuit and the heating elements respectively, the controller comprising a plurality of output ports for outputting enable signals; a switching circuit electrically connected between the power supply circuit and the controller, the switching circuit having a plurality of different switching states, and the switching circuit being configured to send corresponding output signals to the controller according to the switching states; two or more switching circuits, each of the switching circuits being electrically connected between the power supply circuit and a corresponding heating element, and the switching circuit being connected to a corresponding output port to receive an enable signal; a trigger circuit electrically connected with the power supply circuit and the controller respectively, the trigger circuit being configured to send a trigger signal to the controller in response to a trigger action; wherein the controller is configured to selectively activate one or more of the output ports based on the output signals, and is configured to output an enable signal to the corresponding switching circuit through the activated output port based on the trigger signal, so as to control the switching circuit to be turned on or turned off.

2. The control circuit of claim 1, wherein, The output signal comprises an output voltage, and the controller is further configured to select the activated output port according to the voltage of the output voltage.

3. The control circuit of claim 2, wherein, The output voltage comprises at least a first output voltage and a second output voltage, and the controller is further configured to activate only one of the output ports when the first output voltage is received, so as to enable the corresponding heating element to start working; and activate at least two output ports when the second output voltage is received, so as to enable the corresponding at least two heating elements to start working simultaneously.

4. The control circuit according to claim 2 or 3, characterized in that, The switching circuit comprises: a toggle switch electrically connected with the controller; a voltage dividing circuit electrically connected between the power supply circuit and a ground terminal, and electrically connected with the toggle switch, the voltage dividing circuit having output nodes corresponding to the switching states, and the voltage dividing circuit being configured to send output voltages of the corresponding output nodes to the controller according to the switching states of the toggle switch.

5. The control circuit of claim 1, wherein, The output signal comprises a switch signal, the switch signal comprising at least a first switch signal and a second switch signal, and the controller is further configured to activate only one of the output ports when the first switch signal is received, so as to enable the corresponding heating element to start working; and activate at least two output ports when the second switch signal is received, so as to enable the corresponding at least two heating elements to start working simultaneously.

6. The control circuit of claim 5, wherein, The switching circuit comprises a pull-up resistor and a dial switch, and the number of dial keys of the dial switch is the same as the number of the heating elements. One end of each of the dial keys is electrically connected to the power supply circuit through a corresponding pull-up resistor and is electrically connected to the controller, and the other end of each of the dial keys is grounded. The dial switch is configured to output a switch signal to the controller according to a switch state combination of its dial keys, wherein each of the switch state combinations corresponds to a switching state of the switching circuit.

7. The control circuit of claim 4, wherein, The dial switch comprises: a common contact electrically connected to the controller; a number of active contacts, the number of active contacts being at least one more than the number of heating elements, the active contacts being respectively electrically connected to corresponding output nodes.

8. The control circuit of claim 7, wherein, The aerosol-generating device comprises two heating elements, the dial switch comprises a common contact, a first active contact, a second active contact, and a third active contact, and the voltage dividing circuit comprises a first resistor and a second resistor connected in series, the voltage dividing circuit having a first output node, a second output node, and a third output node corresponding to switching states of the dial switch; wherein the first output node is located between the power supply circuit and the first resistor and is electrically connected to the first active contact, the second output node is located between the first resistor and the second resistor and is electrically connected to the second active contact, and the third output node is located between the second resistor and a ground terminal and is electrically connected to the third active contact.

9. The control circuit of claim 6, wherein, The aerosol-generating device comprises three heating elements, the switching circuit comprises a first pull-up resistor, a second pull-up resistor, a third pull-up resistor, and a dial switch, and the dial switch comprises a first dial key, a second dial key, and a third dial key; wherein one end of the first dial key is electrically connected to the power supply circuit through the first pull-up resistor, one end of the second dial key is electrically connected to the power supply circuit through the second pull-up resistor, one end of the third dial key is electrically connected to the power supply circuit through the third pull-up resistor, and one end of the first dial key, the second dial key, and the third dial key is respectively electrically connected to the controller; the other end of the first dial key, the second dial key, and the third dial key is grounded.

10. The control circuit of claim 1, wherein, The switch circuit comprises a third resistor, a fourth resistor, and an NMOS transistor; the third resistor is electrically connected between the controller and the gate of the NMOS transistor, the fourth resistor is electrically connected between the gate of the NMOS transistor and a ground terminal, the source of the NMOS transistor is grounded, and the drain of the NMOS transistor is electrically connected to the corresponding heating element.

11. The control circuit of claim 1, wherein, The trigger circuit comprises an airflow sensor and / or a touch switch.

12. The control circuit of claim 1, wherein, Further comprising a display circuit electrically connected between the power supply circuit and the controller, the display circuit being used to indicate the working state of the aerosol-generating device.

13. The control circuit of claim 1, wherein, Further comprising a charging circuit electrically connected to the controller, the charging circuit being used to provide a charging voltage to the power supply circuit through an external power source.

14. An aerosol-generating device comprising: The control circuit comprises any one of claims 1-13. The control circuit comprises any one of claims 1-13.

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