Control circuit for aerosol-generating device and aerosol-generating device

Abstract

The utility model discloses a control circuit for an aerosol generating device and the aerosol generating device. Wherein the aerosol generating device comprises more than two heating elements, and the control circuit comprises a power supply circuit; the microphone controller is electrically connected with the power supply circuit and outputs driving voltage in response to the suction action; the switching circuit can selectively provide a plurality of switching positions, and can select at least one heating element to be connected to the power supply circuit or all heating elements not to be connected to the power supply circuit according to the switching positions; the switching circuits correspond to the heating elements, each switching circuit is electrically connected between the switching circuit and the corresponding heating element, and each switching circuit is electrically connected to the microphone controller to receive the driving voltage and can respond to the driving voltage so as to be switched on or switched off; a current loop between the at least one heating element and the power supply circuit is gated or turned off according to the switching position of the switching circuit. Therefore, according to the embodiment of the invention, more than two heating elements can be switched and controlled.

Description

Technical Field

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

[0002] An aerosol generating device includes a liquid storage cavity, and generates an inhalable aerosol by heating an aerosol forming matrix in the liquid storage cavity. The aerosol forming matrix may be a liquid matrix, for example, including glycerol, propylene glycol, nicotine salts or other functional components. In view of the requirements for the capacity and / or taste of the aerosol forming matrix, there are currently aerosol generating devices having two or more liquid storage cavities for storing different matrix components and corresponding heating elements. Therefore, it is particularly important to realize the switching control of two or more heating elements. Summary of the Utility Model

[0003] The present application aims to provide a control circuit for an aerosol generating device and an aerosol generating device, which can realize the switching control of two or more heating elements.

[0004] In a first aspect, an embodiment of the present application provides a control circuit for an aerosol generating device. The aerosol generating device includes two or more heating elements. The control circuit includes: a power supply circuit for providing power;

[0005] A microphone controller electrically connected to the power supply circuit, and the microphone controller is configured to output a driving voltage in response to a suction action;

[0006] A switching circuit, the switching circuit can selectively provide a plurality of switching positions, and the switching circuit is configured to be able to select at least one of the heating elements to be connected to the power supply circuit or all of the heating elements not to be connected to the power supply circuit according to the switching position;

[0007] A switching circuit corresponding to the heating element. Each switching circuit is electrically connected between the switching circuit and the corresponding heating element, and each switching circuit is electrically connected to the microphone controller to receive the driving voltage. The switching circuit is configured to be able to conduct or turn off in response to the driving voltage, and to select to conduct or turn off the current loop between at least one of the heating elements and the power supply circuit according to the switching position of the switching circuit.

[0008] In some embodiments, the switching circuit has a switching position greater than or equal to the number of heating elements.

[0009] In some embodiments, the switching circuit includes a toggle switch;

[0010] When the switching circuit has a number of switching positions equal to the number of heating elements, the toggle switch includes a common terminal and a number of movable contacts equal to the number of heating elements. The common terminal is grounded, and each heating element is electrically connected between the microphone controller and the corresponding movable contact;

[0011] When the switching circuit has a number of switching positions greater than the number of heating elements, the toggle switch includes a common terminal and a number of movable contacts greater than the number of heating elements. The common terminal is grounded, and each heating element is electrically connected between the microphone controller and the corresponding movable contact, and the remaining movable contacts are floating.

[0012] In some embodiments, the switch circuit includes a PMOS transistor. The gate of the PMOS transistor is electrically connected to the switching circuit and one end of the corresponding heating element respectively. The drain of the PMOS transistor is electrically connected to the power supply circuit, and the source of the PMOS transistor is electrically connected to the microphone controller and the other end of the corresponding heating element respectively.

[0013] In some embodiments, the power supply circuit includes:

[0014] A battery cell, electrically connected to the microphone controller and the switch circuit respectively. The battery cell is configured to provide power for the current loop between at least one heating element selected by the switch circuit and the battery cell and provide power for the microphone controller when the switch circuit operates in a conducting state in response to the driving voltage;

[0015] A charging circuit, electrically connected to the microphone controller, and configured to provide a charging voltage for the battery cell through the microphone controller.

[0016] In some embodiments, the charging circuit includes a Type-C interface. The Type-C interface is electrically connected to the microphone controller and configured to receive charging from an external device to provide a charging voltage for the battery cell through the microphone controller.

[0017] In some embodiments, more than two heating elements include a first heating element and a second heating element, and the switch circuits corresponding to the heating elements include a first switch and a second switch;

[0018] The first heating element is electrically connected between the first switch and the switching circuit, the second heating element is electrically connected between the second switch and the switching circuit, and both the first switch and the second switch are electrically connected to the microphone controller to receive a driving voltage.

[0019] In some embodiments, the heating element further includes a third heating element, and the switch circuit corresponding to the heating element further includes a third switch;

[0020] The third heating element is electrically connected between the third switch and the switching circuit, and the third switch is electrically connected to the microphone controller to receive a driving voltage.

[0021] In some embodiments, the control circuit further includes an indication circuit, which is electrically connected to the microphone controller and is used to indicate the working state of the aerosol generating device.

[0022] In some embodiments, the indication circuit includes an LED lamp. The positive electrode of the LED lamp is electrically connected to the microphone controller, and the negative electrode of the LED lamp is grounded.

[0023] In a second aspect, an embodiment of the present application provides an aerosol generating device, including the control circuit described in any of the above embodiments.

[0024] The above embodiments have at least the following beneficial effects: The control circuit and the aerosol generating device for the aerosol generating device provided by the present application. The aerosol generating device includes two or more heating elements. The control circuit outputs a driving voltage through the microphone controller in response to a suction action. The switching circuit can selectively provide multiple switching positions and can select at least one heating element to be connected to the power supply circuit or all heating elements not to be connected to the power supply circuit according to the switching position. The switching circuit corresponds to the heating element and can be turned on or off in response to the driving voltage, and the current loop between at least one heating element and the power supply circuit is selectively turned on or off according to the switching position of the switching circuit, so as to realize the switching control of two or more heating elements. Description of the Drawings

[0025] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the drawings in the figures do not constitute a scale limitation.

[0026] Figure 1 It is a schematic structural diagram of a control circuit for an aerosol generating device provided by an embodiment of the present application;

[0027] Figure 2 It is a schematic structural diagram of a microphone controller, a heating element and a switching circuit provided by an embodiment of the present application;

[0028] Figure 3 It is a schematic structural diagram of a microphone controller, a heating element and a switching circuit provided by an embodiment of the present application;

[0029] Figure 4 It is a schematic structural diagram of a control circuit for an aerosol generating device provided by an embodiment of the present application;

[0030] Figure 5 Schematic structural diagram of a control circuit for an aerosol generating device, where two or more heating elements provided in an embodiment of the present application include a first heating element and a second heating element;

[0031] Figure 6 Provided in an embodiment of the present application Figure 5 Circuit connection schematic diagram;

[0032] Figure 7 Schematic structural diagram of a control circuit for an aerosol generating device, where two or more heating elements provided in an embodiment of the present application include a first heating element, a second heating element, and a third heating element;

[0033] Figure 8 Provided in an embodiment of the present application Figure 7 Circuit connection schematic diagram. Detailed implementation manners

[0034] 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 clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts shall fall within the protection scope of the present application.

[0035] 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 in the embodiments of the present application is used to perform switching control on two or more heating elements in the aerosol generating device, specifically including selecting or turning off the current loop between at least one heating element and the power supply circuit, so as to select or turn off the heating loop of at least one heating element, and realize the switching of different heating combinations of two or more heating elements.

[0036] As one example, the aerosol generating device is a dual-chamber or multi-chamber electronic cigarette. Each atomization chamber includes a liquid storage cavity and a heating element. The liquid storage cavity is used to store the aerosol-forming matrix. The heating element located in the atomization chamber heats the aerosol-forming matrix in the liquid storage cavity in any existing heating manner to generate an inhalable aerosol. The control circuit provided in the embodiments of the present application performs switching control on the heating elements of different atomization chambers, so as to select or turn off the heating loop of at least one atomization chamber, realize atomization chamber switching. If at least two atomization chambers of the electronic cigarette store aerosol-forming matrices with different matrix components, different flavors can be switched by atomization chamber switching.

[0037] Please refer to Figures 1 - 4, the aerosol generating device includes more than two heating elements 20, and the control circuit includes a power supply circuit 11, a microphone controller 12, a switching circuit 13, and a switching circuit 14.

[0038] The power supply circuit 11 is used to provide power.

[0039] The power supply circuit 11 includes a battery cell 111 and a charging circuit 112.

[0040] The battery cell 111 is electrically connected to the microphone controller 12 and the switching circuit 14 respectively. The battery cell 111 is configured to provide power for the current loop between at least one heating element 20 selected by the switching circuit 14 and the battery cell 111 and provide power for the microphone controller 12 when the switching circuit 14 operates in the conducting state in response to the driving voltage.

[0041] It can be seen that the battery cell 111 is used to provide power for the microphone controller 12 and the heating element 20.

[0042] In one example, the battery cell 111 is used to provide power for the microphone controller 12, and each heating element 20 is provided with an independent power supply.

[0043] In one example, the battery cell 111 is electrically connected to the microphone controller 12, and the battery cell 111 is electrically connected to the heating element 20 through a power management circuit. The power management circuit is used to process the power supply voltage output by the battery cell 111 and then provide power for the corresponding heating element 20. For example, the power management circuit can be a power management chip, a boost circuit, a buck circuit, or a voltage stabilizing circuit.

[0044] The battery cell 111 is a rechargeable battery cell and can replenish its power by charging it when its power is reduced or exhausted. In one example, the battery cell 111 is a disposable battery cell.

[0045] The battery cell 111 can be any suitable power supply, such as a DC source, such as 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.

[0046] In some embodiments, the control circuit further includes a protection circuit. The protection circuit is electrically connected to the battery cell 111 and functions to protect the battery cell 111. As Figure 6 or Figure 8 shown, the protection circuit includes a lithium protection chip U2 and its peripheral circuit. In one example, the peripheral circuit of the lithium protection chip U2 is electrically connected between the positive electrode B+ and the negative electrode B- of the battery cell 111, and specifically includes a resistor R6 and a capacitor C3 connected in series.

[0047] The charging circuit 112 is electrically connected to the microphone head controller 12 and is configured to provide a charging voltage for the battery cell 111 through the microphone head controller 12.

[0048] The charging circuit 112 includes a Type-C interface, which is electrically connected to the microphone head controller 12 and is configured to receive charging from an external device to provide a charging voltage for the battery cell 111 through the microphone head controller 12.

[0049] The battery cell 111 is a rechargeable battery cell. An external device such as an adapter provides a charging voltage for the battery cell 111 through the Type-C interface to charge the battery cell 111. It can be understood that if the battery cell 111 is a disposable battery cell, the charging circuit 112 is adaptively omitted. When the power of the battery cell 111 drops to the minimum protection power or is exhausted, a new battery cell 111 is replaced as the power supply for the aerosol generating device.

[0050] As Figure 6 or Figure 8 shown, the charging circuit 112 includes a Type-C interface J1 and its peripheral circuit. The peripheral circuit of the charging circuit 112 includes a resistor R4 and a resistor R5. Among them, the resistor R4 is electrically connected between the CC1 pin of the Type-C interface J1 and the ground terminal GND, and the resistor R5 is electrically connected between the CC2 pin of the Type-C interface J1 and the ground terminal GND. The CC1 pin and the CC2 pin of the Type-C interface J1 have many functions in terms of implementation, such as detecting the connection and removal of the adapter, and also detecting the insertion direction of the plug / socket, etc.

[0051] The microphone head controller 12 is electrically connected to the power supply circuit 11, and the microphone head controller 12 is configured to output a driving voltage in response to a suction action.

[0052] As Figure 6 or Figure 8 shown, the microphone head controller 12 includes a plug-in microphone U1, and the pins of the plug-in microphone U1 are soldered on the circuit board of the control circuit. The plug-in microphone U1 outputs a driving voltage from the AT pin in response to a suction action, and the driving voltage is a constant high-level signal. In one example, a 3.6V driving voltage is output from the AT pin. In one example, a capacitor C2 is provided between the VDD pin of the plug-in microphone U1 and the ground terminal to filter out interference in the charging voltage.

[0053] The switching circuit 13 can selectively provide a plurality of switching positions 131, and the switching circuit 13 is configured to be able to select at least one heating element 20 to be connected to the power supply circuit 11 or all heating elements 20 not to be connected to the power supply circuit 11 according to the switching position 131.

[0054] The switching circuit 13 has a number of switching positions 131 greater than or equal to the number of heating elements 20.

[0055] In an embodiment of the present application, the switching circuit 13 includes a toggle switch.

[0056] The toggle switch includes at least one common terminal 13a, a plurality of movable contacts 13b, and at least one contact piece. Taking the toggle switch including one common terminal 13a, a plurality of movable contacts 13b, and one contact piece as an example, one end of the contact piece is fixedly connected to the common terminal 13a, and the other end of the contact piece selects one of the movable contacts 13b for electrical connection through the action of the toggle switch, which is equivalent to adjusting to the switching position 131 corresponding to the movable contact 13b.

[0057] When the switching circuit 13 has switching positions 131 equal to the number of heating elements 20, the toggle switch includes a common terminal 13a and movable contacts 13b equal to the number of heating elements 20. The common terminal 13a is grounded, and each heating element 20 is electrically connected between the microphone head controller 12 and the corresponding movable contact 13b.

[0058] When the switching circuit 13 has switching positions 131 greater than the number of heating elements 20, the toggle switch includes a common terminal 13a and movable contacts 13b greater than the number of heating elements 20. The common terminal 13a is grounded, and each heating element 20 is electrically connected between the microphone head controller 12 and the corresponding movable contact 13b, and the remaining movable contacts 13b are floating.

[0059] It can be understood that the floating movable contacts 13b can be set according to the actual product requirements. The switching positions 131 corresponding to the floating movable contacts 13b have no output power. When the toggle switch is adjusted to this switching position 131, all the heating elements 20 are not connected to the power supply circuit 11, that is, the aerosol generating device stops working.

[0060] In the above embodiment, each movable contact 13b of the toggle switch corresponds to a switching position 131, that is, the number of movable contacts 13b is equal to the number of switching positions 131. The switching position 131 is selected by applying a force to the actuator of the toggle switch. Common actuators such as a switch handle, etc. At this time, the other end of the contact piece is electrically connected to the movable contact 13b corresponding to the switching position 131, and the heating element 20 connected to the movable contact 13b is selected to be connected to the power supply circuit 11. If the movable contact 13b is floating, it is selected that all the heating elements 20 are not connected to the power supply circuit 11.

[0061] In some embodiments, the toggle switch includes two common terminals 13a and two contact pieces. Each switching position 131 corresponds to two movable contacts 13b. One end of each of the two contact pieces is fixedly connected to the two common terminals 13a, and the common terminals 13a are grounded. By applying a force to the actuator of the toggle switch to select the switching position 131, at this time, the other ends of the two contact pieces are electrically connected to the two movable contacts 13b corresponding to the switching position 131, and two heating elements 20 connected to the two movable contacts 13b can be selected to be connected to the power supply circuit 11. If the two movable contacts 13b are floating, it is selected that all the heating elements 20 are not connected to the power supply circuit 11. If one movable contact 13b is floating, it is selected that the heating element 20 connected to the other movable contact 13b is connected to the power supply circuit 11.

[0062] Similarly, the toggle switch includes N common terminals 13a and N contact pieces. The switching position 131 corresponds to N movable contacts 13b, where N is an integer greater than 2. One end of each of the N contact pieces is fixedly connected to the N common terminals 13a, and the common terminals 13a are grounded. By applying a force to the actuator of the toggle switch to select the switching position 131, at this time, the other ends of the N contact pieces are electrically connected to the N movable contacts 13b corresponding to the switching position 131, and N heating elements 20 connected to the N movable contacts 13b can be selected to be connected to the power supply circuit 11.

[0063] It can be understood that the switching circuit 13 is not limited to the toggle switch provided in the embodiments of the present application, and it can also be other embodiments that can selectively provide multiple switching positions 131 and can select at least one heating element 20 to be connected to the power supply circuit 11 or all the heating elements 20 are not connected to the power supply circuit 11 according to the switching position 131, such as a relay.

[0064] The switch circuit 14 corresponds to the heating element 20. Each switch circuit 14 is electrically connected between the switching circuit 13 and the corresponding heating element 20, and each switch circuit 14 is electrically connected to the microphone controller 12 to receive a driving voltage. The switch circuit 14 is configured to be able to conduct or turn off in response to the driving voltage, and to selectively conduct or turn off the current loop between at least one heating element 20 and the power supply circuit 11 according to the switching position of the switching circuit 13.

[0065] In the embodiments of the present application, the switch circuits 14 correspond to the heating elements 20 one by one. Each switch circuit 14 selectively conducts or turns off the current loop between the corresponding heating element 20 and the power supply circuit 11 according to the switching position of the switching circuit 13.

[0066] In one example, there is one switch circuit 14 corresponding to at least two heating elements 20. The switch circuit 14 selectively conducts or turns off the current loop between the corresponding at least two heating elements 20 and the power supply circuit 11 according to the switching position of the switching circuit 13.

[0067] In one example, there are at least two switching circuits 14 corresponding to one heating element 20. The at least two switching circuits 14 turn on or off the current loop between the corresponding heating element 20 and the power supply circuit 11 according to the switching position of the switching circuit 13.

[0068] The switching circuit 14 includes PMOS transistors. The gates of the PMOS transistors are electrically connected to the switching circuit 13 and one end of the corresponding heating element 20 respectively. The drains of the PMOS transistors are electrically connected to the power supply circuit 11. The sources of the PMOS transistors are electrically connected to the microphone controller 12 and the other end of the corresponding heating element 20 respectively.

[0069] Since the source of the PMOS transistor is electrically connected to the microphone controller 12 to receive the driving voltage, and the gate of the PMOS transistor is electrically connected to the switching circuit 13, when the switching circuit 13 is adjusted to a certain switching position 131, the gate potential of the PMOS transistor is pulled down, meeting the conduction condition of the PMOS transistor, so that the PMOS transistor operates in the conduction state, and the current loop of the power supply circuit 11, the PMOS transistor operating in the conduction state, and the heating element 20 corresponding to a certain switching position 131 is turned on.

[0070] In one example, please refer to Figure 5 , more than two heating elements 20 include a first heating element 201 and a second heating element 202. The switching circuits 14 corresponding to the heating element 20 include a first switch 141 and a second switch 142. The first heating element 201 is electrically connected between the first switch 141 and the switching circuit 13. The second heating element 202 is electrically connected between the second switch 142 and the switching circuit 13. Both the first switch 141 and the second switch 142 are electrically connected to the microphone controller 12 to receive the driving voltage.

[0071] Such as Figure 6As shown in the figure, the switching circuit 13 includes a three-position toggle switch SW1. The three-position toggle switch SW1 includes a common terminal pin 3, a movable contact pin 1, a movable contact pin 2, and a movable contact pin 4. By toggling the three-position toggle switch SW1, the common terminal pin 3 is electrically connected to the movable contact pin 1, the movable contact pin 2, or the movable contact pin 4, corresponding to the three switching positions 131 of the three-position toggle switch SW1 respectively. The first heating element 201 includes a heating wire R1, the second heating element 202 includes a heating wire R2, the first switch 141 includes a PMOS transistor Q1, and the second switch 142 includes a PMOS transistor Q2. The heating wire R1 is electrically connected between the source of the PMOS transistor Q1 and the movable contact pin 1, and the heating wire R2 is electrically connected between the source of the PMOS transistor Q2 and the movable contact pin 4. The sources of the PMOS transistor Q1 and the PMOS transistor Q2 are both electrically connected to the microphone controller 12 to receive the driving voltage. The drains of the PMOS transistor Q1 and the PMOS transistor Q2 are both electrically connected to the positive electrode B+ of the battery cell 111, and the movable contact pin 2 is left floating.

[0072] When the three-position toggle switch SW1 is toggled so that the common terminal pin 3 is electrically connected to the movable contact pin 1, the gate of the PMOS transistor Q1 is grounded through the movable contact pin 1 and the common terminal pin 3. The plug-in microphone U1 outputs a high-level driving voltage in response to the suction action. The driving voltage reaches the sources of the PMOS transistor Q1 and the PMOS transistor Q2. At this time, the voltage difference between the gate and the source of the PMOS transistor Q1 satisfies the conduction condition of the PMOS transistor Q1, and the PMOS transistor Q1 operates in the conducting state. The voltage difference between the gate and the source of the PMOS transistor Q2 does not satisfy the conduction condition of the PMOS transistor Q2, and the PMOS transistor Q2 operates in the cut-off state. Thus, the current loop between the positive electrode B+ of the battery cell 111, the drain of the PMOS transistor Q1, the source of the PMOS transistor Q1, the heating wire R1, and the negative electrode B- of the battery cell 111 is conducted, and the heating wire R1 is powered on to work, while the current loop between the heating wire R2 and the battery cell 111 is turned off, and the heating wire R2 does not work.

[0073] When the three-position toggle switch SW1 is toggled so that the common terminal pin 3 is electrically connected to the movable contact pin 2, the plug-in microphone U1 outputs a high-level driving voltage in response to the suction action. The driving voltage reaches the sources of the PMOS transistor Q1 and the PMOS transistor Q2. At this time, the voltage difference between the gate and the source of the PMOS transistor Q1 does not satisfy the conduction condition of the PMOS transistor Q1, and the PMOS transistor Q1 operates in the cut-off state. The voltage difference between the gate and the source of the PMOS transistor Q2 does not satisfy the conduction condition of the PMOS transistor Q2, and the PMOS transistor Q2 operates in the cut-off state. Thus, the current loops between the heating wire R1 and the heating wire R2 and the battery cell 111 are turned off, and both the heating wire R1 and the heating wire R2 do not work.

[0074] When the three-stage toggle switch SW1 is toggled so that the common terminal pin 3 is electrically connected to the movable contact pin 4, the gate of the PMOS transistor Q2 is grounded through the movable contact pin 4 and the common terminal pin 3. The plug-in microphone U1 outputs a high-level driving voltage in response to the sucking action. The driving voltage reaches the source of the PMOS transistor Q1 and the source of the PMOS transistor Q2. At this time, the voltage difference between the gate of the PMOS transistor Q1 and the source of the PMOS transistor Q1 does not meet the conduction condition of the PMOS transistor Q1, and the PMOS transistor Q1 operates in the cut-off state. The voltage difference between the gate of the PMOS transistor Q2 and the source of the PMOS transistor Q2 meets the conduction condition of the PMOS transistor Q2, and the PMOS transistor Q2 operates in the conduction state. Thus, the current loop between the positive electrode B+ of the battery cell 111, the drain of the PMOS transistor Q2, the source of the PMOS transistor Q2, the heating wire R2 to the negative electrode B- of the battery cell 111 is conducted, and the heating wire R2 is powered on to work, and the current loop between the heating wire R1 and the battery cell 111 is turned off, and the heating wire R1 does not work.

[0075] Based on the above embodiments, please refer to Figure 7 , the heating element 20 further includes a third heating element 203, and the switch circuit 14 corresponding to the heating element 20 further includes a third switch 143. The third heating element 203 is electrically connected between the third switch 143 and the switching circuit 13, and the third switch 143 is electrically connected to the microphone controller 12 to receive the driving voltage.

[0076] As Figure 8 shown, the third heating element includes a heating wire R3, the third switch 143 includes a PMOS transistor Q3, the heating wire R3 is electrically connected between the source of the PMOS transistor Q3 and the movable contact pin 2 of the three-stage toggle switch SW1, the source of the PMOS transistor Q3 is electrically connected to the microphone controller 12 to receive the driving voltage, and the drain of the PMOS transistor Q3 is electrically connected to the positive electrode B+ of the battery cell 111.

[0077] When the three-stage toggle switch SW1 is toggled so that the common terminal pin 3 is electrically connected to the movable contact pin 2, the gate of the PMOS transistor Q3 is grounded through the movable contact pin 2 and the common terminal pin 3. The plug-in microphone U1 outputs a high-level driving voltage in response to the suction action. The driving voltage reaches the source of the PMOS transistor Q1, the source of the PMOS transistor Q2, and the source of the PMOS transistor Q3. At this time, the voltage difference between the gate and the source of the PMOS transistor Q1 does not meet the conduction condition of the PMOS transistor Q1, and the PMOS transistor Q1 operates in the cut-off state. The voltage difference between the gate and the source of the PMOS transistor Q2 does not meet the conduction condition of the PMOS transistor Q2, and the PMOS transistor Q2 operates in the cut-off state. The voltage difference between the gate and the source of the PMOS transistor Q3 meets the conduction condition of the PMOS transistor Q3, and the PMOS transistor Q3 operates in the conduction state. Thus, the current loop between the heating wires R1 and R2 and the battery cell 111 is turned off, and both the heating wires R1 and R2 do not work. The current loop between the positive electrode B+ of the battery cell 111, the drain of the PMOS transistor Q3, the source of the PMOS transistor Q3, the heating wire R3 to the negative electrode B- of the battery cell 111 is conducted, and the heating wire R3 is powered on and works.

[0078] Please refer to again Figure 4 , the control circuit further includes an indication circuit 15, which is electrically connected to the microphone controller 12 and is used to indicate the working state of the aerosol generating device.

[0079] The indication circuit 15 includes an LED lamp. The positive electrode of the LED lamp is electrically connected to the microphone controller 12, and the negative electrode of the LED lamp is grounded.

[0080] As Figure 6 or Figure 8 shown, the plug-in microphone U1 includes an LED signal pin, and the indication circuit 15 includes an LED lamp LED1. The LED lamp LED1 is electrically connected between the LED signal pin of the plug-in microphone U1 and the ground terminal and is used to indicate the working state of the aerosol generating device. In one example, the correspondence between the display of the LED lamp LED1 and the working state of the aerosol generating device is shown in the following table:

[0081] Display Working status Flash the light once The battery is powered on for the first time Gradually brighten Normal trigger operation Gradually dim Normal end of operation Flash the light twice Long - term operation Constant light for 2 seconds Over - current or short - circuit protection Flash the light ten times Battery under - voltage before operation Constant light Charging Off Fully charged Flash the light three times Disconnect the charging

[0082] The control circuit and aerosol generating device provided by the present application for an aerosol generating device. The aerosol generating device includes more than two heating elements. The control circuit outputs a driving voltage in response to a suction action through a microphone controller. The switching circuit can selectively provide multiple switching positions and can select at least one heating element to be connected to the power supply circuit or all heating elements not to be connected to the power supply circuit according to the switching position. The switching circuit corresponds to the heating element and can be turned on or off in response to the driving voltage, and can selectively turn on or off the current loop between at least one heating element and the power supply circuit according to the switching position of the switching circuit, so as to realize the switching control of more than two heating elements.

[0083] In addition, the control circuit for the aerosol generating device provided by the embodiments of the present application is implemented entirely by hardware without the need for software cooperation, reducing the design difficulty. At the same time, by using a microphone controller to replace the MCU and charging IC in the prior art, the cost is reduced and it is beneficial to the miniaturization of the product.

[0084] The embodiments of the present application provide an aerosol generating device, including the control circuit of any of the above embodiments. The aerosol generating device includes more than two heating elements 20, and the control circuit is used to perform switching control on more than two heating elements 20.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit 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 changes 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 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 for an aerosol generating device, characterized in that, The aerosol generating device includes more than two heating elements, and the control circuit includes: A power supply circuit for providing power; A microphone controller electrically connected to the power supply circuit, and the microphone controller is configured to output a driving voltage in response to a suction action; A switching circuit, the switching circuit can selectively provide a plurality of switching positions, and the switching circuit is configured to be able to select at least one of the heating elements to be connected to the power supply circuit or all of the heating elements not to be connected to the power supply circuit according to the switching position; A switching circuit, corresponding to the heating element, each switching circuit is electrically connected between the switching circuit and the corresponding heating element, and each switching circuit is electrically connected to the microphone controller to receive the driving voltage. The switching circuit is configured to be able to conduct or turn off in response to the driving voltage, and to select to conduct or turn off the current loop between at least one of the heating elements and the power supply circuit according to the switching position of the switching circuit.

2. The control circuit according to claim 1, wherein The switching circuit has a switching position greater than or equal to the number of heating elements.

3. The control circuit according to claim 2, wherein The switching circuit includes a toggle switch; When the switching circuit has a switching position equal to the number of heating elements, the toggle switch includes a common terminal and a number of movable contacts equal to the number of heating elements. The common terminal is grounded, and each heating element is electrically connected between the microphone controller and the corresponding movable contact; When the switching circuit has a switching position greater than the number of heating elements, the toggle switch includes a common terminal and a number of movable contacts greater than the number of heating elements. The common terminal is grounded, and each heating element is electrically connected between the microphone controller and the corresponding movable contact, and the remaining movable contacts are floating.

4. The control circuit according to claim 1, wherein The switching circuit includes a PMOS transistor. The gates of the PMOS transistors are electrically connected to the switching circuit and one end of the corresponding heating element respectively. The drains of the PMOS transistors are electrically connected to the power supply circuit, and the sources of the PMOS transistors are electrically connected to the microphone controller and the other end of the corresponding heating element respectively.

5. The control circuit according to claim 1, wherein The power supply circuit includes: A battery cell, electrically connected to the microphone controller and the switching circuit respectively. The battery cell is configured to provide power for the current loop between at least one of the heating elements selected by the switching circuit and the battery cell and provide power for the microphone controller when the switching circuit operates in the conducting state in response to the driving voltage; A charging circuit, electrically connected to the microphone controller, and configured to provide a charging voltage for the battery cell through the microphone controller.

6. The control circuit according to claim 5, wherein The charging circuit includes a Type-C interface, and the Type-C interface is electrically connected to the microphone controller and is configured to receive charging from an external device to provide a charging voltage for the battery cell through the microphone controller.

7. The control circuit according to any one of claims 1-6, characterized in that, More than two of the heating elements include a first heating element and a second heating element, and the switching circuits corresponding to the heating elements include a first switch and a second switch; The first heating element is electrically connected between the first switch and the switching circuit, the second heating element is electrically connected between the second switch and the switching circuit, and both the first switch and the second switch are electrically connected to the microphone controller to receive a driving voltage.

8. The control circuit according to claim 7, characterized in that, The heating element further includes a third heating element, and the switch circuit corresponding to the heating element further includes a third switch; The third heating element is electrically connected between the third switch and the switching circuit, and the third switch is electrically connected to the microphone controller to receive a driving voltage.

9. The control circuit according to any one of claims 1-6, characterized in that, The control circuit further includes an indication circuit, and the indication circuit is electrically connected to the microphone controller for indicating the working state of the aerosol generating device.

10. The control circuit according to claim 9, wherein The indication circuit includes an LED lamp, the positive electrode of the LED lamp is electrically connected to the microphone controller, and the negative electrode of the LED lamp is grounded.

11. An aerosol generating device, characterized in that, Comprising the control circuit according to any one of claims 1-10.

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