Control circuit of aerosol-generating device

Abstract

The application relates to a control circuit of an aerosol generating device. The control circuit of the aerosol generating device comprises a switching circuit, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a resonant circuit, a first inductor and a second inductor. The control circuit of the aerosol generating device provides a driving logic circuit with simple control logic. The driving logic circuit charges the resonant circuit based on the first switch tube, the second switch tube, the third switch tube and the fourth switch tube alternately driving the first inductor and the second inductor. Compared with the traditional resistance heating mode, the electromagnetic eddy current induction heating mode of the control circuit of the aerosol generating device has faster heating efficiency. Under the same conditions, the control circuit of the aerosol generating device can heat the aerosol in a shorter time, so that the aerosol reaches the effect of being able to be smoked.

Description

Technical Field

[0001] This application relates to the field of aerosol heating technology, and in particular to a control circuit for an aerosol generating device. Background Technology

[0002] In existing technologies, resistance heating elements are commonly used to heat non-combustible materials. Specifically, the resistance heating element transfers a temperature of around 300°C to the non-combustible material through electrical heating, using low-temperature heating to bake the material and achieve an absorbable effect. However, this resistance heating method suffers from low heating efficiency. Utility Model Content

[0003] Therefore, it is necessary to provide a control circuit for a high-efficiency aerosol generating device, including:

[0004] The switching circuit has a first terminal for receiving an enable signal and a second terminal for receiving a first power supply.

[0005] The collector of the first switching transistor is connected to the third terminal of the switching circuit and the base of the first switching transistor, respectively.

[0006] The second switch has its gate connected to the emitter of the first switch, and its source grounded.

[0007] The collector of the third switching transistor is connected to the third terminal of the switching circuit and the base of the third switching transistor, respectively.

[0008] The fourth switch has its gate connected to the emitter of the third switch, and its source is grounded.

[0009] A resonant circuit is connected in series between the drains of the second and fourth switching transistors; a heating element is placed within the alternating magnetic field generated by the resonant circuit, and the heating element is used to heat the aerosol.

[0010] The first inductor has its first end connected to the second power supply, and its second end connected to the gate of the second switching transistor and the drain of the fourth switching transistor.

[0011] The second inductor has its first end connected to the second power supply, and its second end connected to the gate of the fourth switching transistor and the drain of the second switching transistor.

[0012] Specifically, when the enable signal is high, the first switch is turned on to charge the resonant circuit using the first inductor; when the enable signal is low, the first switch is turned off.

[0013] or,

[0014] When the enable signal is high, the second switch is turned on to charge the resonant circuit using the second inductor; when the enable signal is low, the second switch is turned off.

[0015] In one embodiment, the control circuit of the above-mentioned aerosol generating device further includes:

[0016] The first diode has its anode connected to the emitter of the first switching transistor, and its cathode connected to the second terminal of the first inductor and the base of the first switching transistor, respectively.

[0017] The anode of the second diode is connected to the emitter of the third switch, and the cathode of the second diode is connected to the second terminal of the second inductor and the base of the third switch.

[0018] In one embodiment, the control circuit of the above-mentioned aerosol generating device further includes:

[0019] The anode of the third diode is connected to the emitter of the first switching transistor, and the cathode of the third diode is connected to the second terminal of the first inductor.

[0020] The anode of the fourth diode is connected to the emitter of the third switching transistor, and the cathode of the fourth diode is connected to the second terminal of the second inductor.

[0021] In one embodiment, the control circuit of the above-mentioned aerosol generating device further includes:

[0022] The first pull-down resistor has its first end connected to the gate of the second switching transistor, and its second end grounded.

[0023] The second pull-down resistor has its first end connected to the gate of the fourth switching transistor, and its second end grounded.

[0024] In one embodiment, the switching circuit includes:

[0025] The base of the fifth switch is used to receive the enable signal, and the emitter of the fifth switch is grounded.

[0026] The sixth switch has its base connected to the collector of the fifth switch, its emitter connected to the first power supply, and its collector connected to the collectors of the first and third switches.

[0027] Specifically, when the enable signal is high, both the fifth and sixth switching transistors are turned on; when the enable signal is low, both the fifth and sixth switching transistors are turned off.

[0028] In one embodiment, the control circuit of the above-mentioned aerosol generating device further includes:

[0029] The first pull-up resistor is connected between the emitter of the first switching transistor and the collector of the sixth switching transistor.

[0030] The second pull-up resistor is connected between the emitter of the third switch and the collector of the sixth switch.

[0031] In one embodiment, the switching circuit further includes:

[0032] The third pull-up resistor is connected between the base and emitter of the sixth switching transistor.

[0033] In one embodiment, the switching circuit further includes:

[0034] The third pull-down resistor is connected between the base and emitter of the fifth switching transistor.

[0035] In one embodiment, the switching circuit further includes:

[0036] The first current limiting circuit is connected in series between the collector of the fifth switching transistor and the base of the sixth switching transistor.

[0037] In one embodiment, the switching circuit further includes:

[0038] The second current limiting circuit has a first terminal for receiving an enable signal and a second terminal connected to the base of the fifth switching transistor.

[0039] The control circuit of the aforementioned aerosol generating device includes a switching circuit, a first switching transistor, a second switching transistor, a third switching transistor, a fourth switching transistor, a resonant circuit, a first inductor, and a second inductor. This control circuit provides a simple drive logic circuit, which uses the first, second, third, and fourth switching transistors to alternately drive the first and second inductors to charge the resonant circuit. Compared to traditional resistance heating, the electromagnetic eddy current induction heating method of this aerosol generating device's control circuit is more efficient. Under the same conditions, the control circuit can heat the aerosol in a shorter time, making the aerosol inhalable. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 One of the structural block diagrams of the control circuit of an aerosol generating device according to an embodiment;

[0042] Figure 2 This is a schematic diagram illustrating the Faraday principle of electromagnetic induction in one embodiment.

[0043] Figure 3 This is a second structural block diagram of the control circuit of an aerosol generating device according to an embodiment. Detailed Implementation

[0044] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0046] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various components, but these components are not limited by these terms. These terms are only used to distinguish one component from another. For example, without departing from the scope of this application, a first switching transistor may be referred to as a second switching transistor, and similarly, a second switching transistor may be referred to as a first switching transistor. Both the first and second switching transistors are switching transistors, but they are not the same switching transistor.

[0047] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0048] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0049] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0050] In a specific embodiment, such as Figure 1 As shown, a control circuit 10 for an aerosol generating device is provided, including: a switching circuit 102, a first switching transistor Q1, a second switching transistor Q2, a third switching transistor Q3, a fourth switching transistor Q4, a resonant circuit 104, a first inductor L1, and a second inductor L2.

[0051] The first terminal of the switching circuit 102 is used to connect to the enable signal V_en, and the second terminal of the switching circuit 102 is used to connect to the first power supply V1.

[0052] The collector of the first switching transistor Q1 is connected to the third terminal of the switching circuit 102 and the base of the first switching transistor Q1, respectively. For example, the first switching transistor Q1 can be an NPN type switching transistor, such as an NPN transistor.

[0053] The gate of the second switch Q2 is connected to the emitter of the first switch Q1, and the source of the second switch Q2 is grounded. For example, the second switch Q2 can be an N-type switch, such as a MOSFET (N-type Metal-Oxide-Semiconductor Field-Effect Transistor).

[0054] The collector of the third switch Q3 is connected to the third terminal of the switching circuit 102 and the base of the third switch Q3, respectively. For example, the third switch Q3 can be an NPN type switch, such as an NPN transistor.

[0055] The gate of the fourth switch Q4 is connected to the emitter of the third switch Q3, and the source of the fourth switch Q4 is grounded. For example, the fourth switch Q4 can be an N-type switch, such as a MOSFET (N-type Metal-Oxide-Semiconductor Field-Effect Transistor).

[0056] The resonant circuit 104 is connected in series between the drain of the second switch Q2 and the drain of the fourth switch Q4; wherein, a heating element R is placed in the alternating magnetic field generated by the resonant circuit 104, and the heating element R is used to heat the aerosol.

[0057] The first end of the first inductor L1 is used to connect to the second power supply V2, and the second end of the first inductor L1 is connected to the gate of the second switch Q2 and the drain of the fourth switch Q4.

[0058] The first end of the second inductor L2 is used to connect to the second power supply V2, and the second end of the second inductor L2 is connected to the gate of the fourth switch Q4 and the drain of the second switch Q2.

[0059] Specifically, when the enable signal V_en is high, the first switch Q1 is turned on to charge the first inductor L1 for the resonant circuit 104; when the enable signal V_en is low, the first switch Q1 is turned off.

[0060] Alternatively, when the enable signal V_en is high, the second switch Q2 is turned on to charge the second inductor L2 for the resonant circuit 104; when the enable signal V_en is low, the second switch Q2 is turned off.

[0061] With the first power supply V1 and the second power supply V2 connected, the control circuit 10 of the aerosol generating device is connected to the main power supply. The first power supply V1 and the second power supply V2 can be of the same voltage or different voltages. The first power supply V1 ensures the normal operation of the switching circuit 102, and the second power supply V2 provides the main power to the control circuit 10 of the aerosol generating device.

[0062] When the enable signal V_en is high, the switching circuit 102 is turned on, and the voltage at V3 is the same as the voltage at the first power supply V1. The first switch Q1 and the third switch Q3 have voltage following characteristics and will follow the voltage at V3. The electrical signal at V3 flows through the first switch Q1 to the gate of the second switch Q2, and through the third switch Q3 to the gate of the fourth switch Q4. The first switch Q1 and the third switch Q3 also have current amplification capabilities, strong load-carrying capacity, and can control the on / off state of the second switch Q2 and the fourth switch Q4.

[0063] Specifically, after power-on, i.e., after the first power supply V1 and the second power supply V2 are connected, the switching circuit 102 is in the off state when a low-level enable signal V_en is connected or when no enable signal V_en is connected. At this time, the voltage at V3 is 0, and both the first switch Q1 and the third switch Q3 are in the off state. Therefore, the current from the second power supply V2 cannot flow to the resonant circuit 104, and the resonant circuit 104 does not work. When the switching circuit 102 is in the on state when a high-level enable signal V_en is connected, the voltage at V3 is equal to the voltage of the first power supply V1, and the current at V3 flows through the first switch Q1 and the third switch Q3 to the second switch Q2 and the fourth switch Q4, respectively. Because there is a slight difference in the junction capacitance C between the second switch Q2 and the fourth switch Q4, the current flowing into the second switch Q2 and the fourth switch Q4 are not the same. Therefore, at a certain moment, one of the second switch Q2 and the fourth switch Q4 turns on first, and the gate of the other switch is pulled low, so that the switch is in the off state, thereby completing the start-up of the control circuit 10 of the aerosol generation device.

[0064] Taking the second switch Q2 being turned on first as an example, when the second switch Q2 is in the on state, the gate of the fourth switch Q4 is pulled low, making the fourth switch Q4 in the off state. At this time, the current at V3 flows to the first inductor L1, so that the first inductor L1 charges the resonant circuit 104. When the voltage of the resonant circuit 104 is equal to the voltage at V3, the resonant circuit 104 is in a magnetic saturation state, and its ability to suppress the incoming current is reduced. Since one end of the resonant circuit 104 is grounded through the second switch Q2, the resonant circuit 104 can actively pull down the gate voltage of the second switch Q2, causing the second switch Q2 to enter the amplification region from the saturation region, and its internal resistance gradually increases, and the drain voltage of the second switch Q2 begins to rise. The gate of the fourth switch Q4 is connected to the drain of the second switch Q2. Therefore, the gate voltage of the fourth switch Q4 will rise as the drain voltage of the second switch Q2 rises. At this time, the fourth switch Q4 gradually enters the amplification region and gradually turns on. In this scenario, the second switch Q2 is accelerated to turn off, while the fourth switch Q4 is accelerated to turn on. As the fourth switch Q4 moves from the amplification region to the saturation region, its drain and source are connected and grounded. The gate voltage of the second switch Q2 is pulled down to zero volts. At this point, the second switch Q2 is in the off state, and the fourth switch Q4 is in the on state. The resonant circuit 104 has now completely discharged, and the voltage across it is zero. The current in the second inductor L2 reaches its maximum, and the magnetic energy of the second inductor L2 begins to be converted into electrical energy to charge the resonant circuit 104 in reverse. That is, when the fourth switch Q4 is on, the current at V3 flows to the second inductor L2, allowing the second inductor L2 to charge the resonant circuit 104. Alternatively, in the control circuit 10 of the aerosol generation device, the fourth switch Q4 can be turned on first. The circuit operation logic when the fourth switch Q4 is turned on first is similar to that when the second switch Q2 is turned on first, and will not be elaborated further here.

[0065] Therefore, during the oscillation process of the control circuit 10 of the aerosol generating device, the current at V3 sequentially replenishes the energy lost by the resonant circuit 104 through the first inductor L1 and the second inductor L2 until the enable signal V_en connected to the switch circuit 102 becomes low or the switch circuit 102 is not connected to the enable signal V_en, at which point the oscillation stops.

[0066] like Figure 2As shown, according to Faraday's principle of electromagnetic induction, an alternating electric field can generate an alternating magnetic field. The high-frequency alternating current generated by the alternating conduction of the second switch Q2 and the fourth switch Q4 is supplied to the inductor coil of the resonant circuit 104. The resonant circuit 104 generates an alternating magnetic field, within which a heating element R is placed. The heating element R, under the cutting of magnetic field lines, will generate induced currents, i.e., eddy currents, at different depths. Due to its impedance characteristics and the flow of eddy currents on the heating element R, the heated aerosol will generate heat per unit time, causing the aerosol's temperature to rise, thus achieving the purpose of heating the aerosol.

[0067] The control circuit 10 of the aforementioned aerosol generating device includes a switching circuit 102, a first switch Q1, a second switch Q2, a third switch Q3, a fourth switch Q4, a resonant circuit 104, a first inductor L1, and a second inductor L2. This control circuit 10 provides a simple drive logic circuit, which uses the first switch Q1, second switch Q2, third switch Q3, and fourth switch Q4 to alternately drive the first inductor L1 and the second inductor L2 to charge the resonant circuit 104. Compared to traditional resistance heating, the electromagnetic eddy current induction heating method of the control circuit 10 of this aerosol generating device has a faster heating efficiency. Under the same conditions, the control circuit 10 can heat the aerosol in a shorter time, making the aerosol inhalable.

[0068] Furthermore, when the alternating magnetic field generated by the resonant circuit 104 can completely encompass the heating element R, the heating element R can be heated uniformly and directly. Compared with the indirect heating logic based on thermal radiation and thermal conduction used in the traditional resistance electric heating method, the direct heating logic in the control circuit 10 of this aerosol generating device can reduce heat loss and thus improve heat utilization.

[0069] Furthermore, the control circuit 10 of this aerosol generating device employs electromagnetic eddy current induction heating, enabling aerosol heating even when the heating element R and the aerosol are placed separately. Compared to the traditional resistance heating method where the heating element R and the aerosol are in direct contact, the control circuit 10 of this aerosol generating device does not come into contact with the dirt generated during aerosol combustion, making the control circuit 10 of this aerosol generating device easier to clean.

[0070] In a specific embodiment, such as Figure 3 As shown, the control circuit 10 of the above-mentioned aerosol generating device further includes: a first diode D1 and a second diode D2.

[0071] The anode of the first diode D1 is connected to the emitter of the first switching transistor Q1, and the cathode of the first diode D1 is connected to the second terminal of the first inductor L1 and the base of the first switching transistor Q1.

[0072] Diodes have good unidirectional conductivity. Therefore, the first diode D1 can prevent high reverse voltage from being applied to the emitter of the first switching transistor Q1, so as to prevent the emitter of the first switching transistor Q1 from being broken down by high voltage and play a clamping role.

[0073] The anode of the second diode D2 is connected to the emitter of the third switch Q3, and the cathode of the second diode D2 is connected to the second terminal of the second inductor L2 and the base of the third switch Q3.

[0074] Similar to the first diode D1, the second diode D2 can prevent reverse high voltage from being applied to the emitter of the third switch Q3, so as to prevent the emitter of the third switch Q3 from being broken down by high voltage and play a clamping role.

[0075] In a specific embodiment, such as Figure 3 As shown, the control circuit 10 of the above-mentioned aerosol generating device further includes: a third diode D3 and a fourth diode D4.

[0076] The anode of the third diode D3 is connected to the emitter of the first switching transistor Q1, and the cathode of the third diode D3 is connected to the second terminal of the first inductor L1.

[0077] Diodes have good unidirectional conductivity. Therefore, the third diode D3 can prevent a forward high voltage from being applied to the emitter of the first switching transistor Q1, thus preventing the emitter of the first switching transistor Q1 from being broken down by high voltage and playing a clamping role.

[0078] The anode of the fourth diode D4 is connected to the emitter of the third switch Q3, and the cathode of the fourth diode D4 is connected to the second terminal of the second inductor L2.

[0079] Similar to the third diode D3, the fourth diode D4 can prevent a forward high voltage from being applied to the emitter of the third switching transistor Q3, thus preventing the emitter of the third switching transistor Q3 from being broken down by high voltage and playing a clamping role.

[0080] In one embodiment, such as Figure 3 As shown, the resonant circuit 104 includes a capacitor C and a third inductor L3.

[0081] The capacitor C is connected between the drain of the second switch Q2 and the drain of the fourth switch Q4.

[0082] The third inductor L3 is connected between the drain of the second switch Q2 and the drain of the fourth switch Q4, and the capacitor C and the third inductor L3 are connected in parallel.

[0083] Capacitor C and third inductor L3 can resonate at a specific frequency, causing the second switch Q2 and the fourth switch Q4 to alternately turn on and off near the resonant point, thereby achieving circuit oscillation.

[0084] Taking the example of the second switch Q2 being turned on first, the fourth switch Q4 is in the off state through the second diode D2 and the fourth diode D4. At this time, the current at V3 can flow through the first inductor L1 to the resonant circuit 104 to charge the capacitor C in the resonant circuit 104. When the voltage of capacitor C is equal to the voltage at V3, the polarity of the first inductor L1 will change to maintain the current and continue to charge capacitor C. When the voltage of capacitor C reaches its maximum value, capacitor C charges the third inductor L3. As the charging current increases, the third inductor L3 approaches magnetic saturation, thus reducing its ability to suppress current. Since one end of the resonant circuit 104 is grounded after the second switch Q2, the third inductor L3 begins to pass through the first diode D1 and the third diode D3 to control the gate voltage of the second switch Q2, causing the second switch Q2 to enter the amplification region from the saturation region, and its internal resistance gradually increases, and the drain voltage of the second switch Q2 begins to rise. The gate of the fourth switch Q4 is connected to the drain of the second switch Q2 through the second diode D2 and the fourth diode D4. Therefore, the gate voltage of the fourth switch Q4 increases as the drain voltage of the second switch Q2 increases. At this time, the fourth switch Q4 gradually enters the amplification region and gradually turns on. In this situation, the second switch Q2 is accelerated to turn off, and the fourth switch Q4 is accelerated to turn on. As the fourth switch Q4 enters the saturation region from the amplification region, the drain and source of the fourth switch Q4 are connected and grounded, and the gate voltage of the second switch Q2 is pulled down to zero volts. At this time, the second switch Q2 is in the off state, and the fourth switch Q4 is in the on state. At this time, the capacitor C is completely discharged, the voltage across the capacitor C is zero, and the current in the second inductor L2 reaches its maximum. At this time, the magnetic energy of the second inductor L2 begins to be converted into electrical energy to charge the capacitor C in reverse.

[0085] In a specific embodiment, such as Figure 3 As shown, the control circuit 10 of the above-mentioned aerosol generating device further includes: a first pull-down resistor R1 and a second pull-down resistor R2.

[0086] The first end of the first pull-down resistor R1 is connected to the gate of the second switch Q2, and the second end of the first pull-down resistor R1 is grounded.

[0087] The gate voltage of the second switch Q2 can be pulled down to ground through the first pull-down resistor R1. When the first switch Q1 is not turned on, the first pull-down resistor R1 can reliably keep the second switch Q2 in the off state.

[0088] The first end of the second pull-down resistor R2 is connected to the gate of the fourth switch Q4, and the second end of the second pull-down resistor R2 is grounded.

[0089] The gate voltage of the fourth switch Q4 can be pulled down to ground through the second pull-down resistor R2. When the third switch Q3 is not turned on, the second pull-down resistor can reliably keep the fourth switch Q4 in the off state.

[0090] In a specific embodiment, such as Figure 3 As shown, the switching circuit 102 includes a fifth switching transistor Q5 and a sixth switching transistor Q6.

[0091] The base of the fifth switch Q5 is used to connect to the enable signal V_en, and the emitter of the fifth switch Q5 is grounded. For example, the fifth switch Q5 can be an NPN type switch, such as an NPN transistor.

[0092] The base of the sixth switch Q6 is connected to the collector of the fifth switch Q5, the emitter of the sixth switch Q6 is connected to the first power supply V1, and the collector of the sixth switch Q6 is connected to the collectors of the first switch Q1 and the third switch Q3. For example, the sixth switch Q6 can be a PNP type switch, such as a PNP transistor.

[0093] Specifically, when the enable signal V_en is high, both the fifth switch Q5 and the sixth switch Q6 are turned on; when the enable signal V_en is low, both the fifth switch Q5 and the sixth switch Q6 are turned off.

[0094] When the enable signal V_en is high, the fifth switch Q5 is turned on, causing an electrical signal to flow to the sixth switch Q6. With both the first power supply V1 and the electrical signal from the fifth switch Q5 connected to the sixth switch Q6, the sixth switch Q6 is turned on, making the voltage at V3 equal to the voltage of the first power supply V1. When the enable signal V_en is low, the fifth switch Q5 is in the off state. At this time, no electrical signal flows from the fifth switch Q5 to the sixth switch Q6, therefore, the sixth switch Q6 is also in the off state.

[0095] In a specific embodiment, such as Figure 3 As shown, the control circuit 10 of the above-mentioned aerosol generating device further includes: a first pull-up resistor R3 and a second pull-up resistor R4.

[0096] The first pull-up resistor R3 is connected between the emitter of the first switch Q1 and the collector of the sixth switch Q6.

[0097] When the switching circuit 102 is in the on state, the current at V3 can flow to the second switching transistor Q2 through the first pull-up resistor R3, thereby enabling the second switching transistor Q2 to be turned on quickly.

[0098] The second pull-up resistor R4 is connected between the emitter of the third switch Q3 and the collector of the sixth switch Q6.

[0099] Corresponding to the first pull-up resistor R3, when the switching circuit 102 is in the on state, the current at V3 can flow to the fourth switch Q4 through the second pull-up resistor R4, thereby enabling the fourth switch Q4 to be turned on quickly.

[0100] In a specific embodiment, such as Figure 3 As shown, the above-mentioned switching circuit 102 also includes a third pull-up resistor R5.

[0101] The third pull-up resistor R5 is connected between the base and emitter of the sixth switch Q6.

[0102] The sixth switch Q6 is pulled up to the first power supply V1 through the third pull-up resistor R5, so that when the fifth switch Q5 is not connected to the enable signal V_en or is connected to the low-level enable signal V_en, the sixth switch Q6 is in a reliable cut-off state, thereby improving the stability and reliability of the control circuit 10 of the aerosol generation device.

[0103] In a specific embodiment, such as Figure 3 As shown, the above-mentioned switching circuit 102 also includes a third pull-down resistor R6.

[0104] The third pull-down resistor R6 is connected between the base and emitter of the fifth switching transistor Q5.

[0105] The fifth switch Q5 is pulled down to ground through the third pull-down resistor R6, so that the fifth switch Q5 is in a reliable cut-off state when the fifth switch Q5 is not connected to the enable signal V_en or is connected to the low-level enable signal V_en, thereby improving the stability and reliability of the control circuit 10 of the aerosol generation device.

[0106] In one specific embodiment, the switching circuit 102 further includes a first current limiting circuit.

[0107] The first current-limiting circuit is connected in series between the collector of the fifth switch Q5 and the base of the sixth switch Q6.

[0108] The first current limiting circuit can limit the current flowing out of the collector of the fifth switch Q5, thereby playing a current limiting protection role and improving the reliability of the control circuit 10 of the aerosol generating device.

[0109] For example, such as Figure 3 As shown, the first current limiting circuit may include a first current limiting resistor R7.

[0110] In one specific embodiment, the switching circuit 102 further includes a second current limiting circuit.

[0111] The first terminal of the second current limiting circuit is used to connect the enable signal V_en, and the second terminal of the second current limiting circuit is connected to the base of the fifth switching transistor Q5.

[0112] The second current limiting circuit can limit the current flowing into the base of the fifth switching transistor Q5, thereby playing a current limiting protection role and improving the reliability of the control circuit 10 of the aerosol generation device.

[0113] In one embodiment, such as Figure 3 As shown, the control circuit 10 of the above-mentioned aerosol generating device further includes: a fourth pull-up resistor R9 and a fifth pull-up resistor R10.

[0114] The fourth pull-up resistor R9 is connected between the collector and base of the first switching transistor Q1.

[0115] The base of the first switching transistor Q1 is pulled up to the voltage at V3 through the fourth pull-up resistor R9, so that the first switching transistor Q1 is turned on when the switching circuit 102 is in the on state.

[0116] The fifth pull-up resistor R10 is connected between the collector and base of the second switch Q2.

[0117] Similar to the fourth pull-up resistor R9, the base of the third switch Q3 is pulled up to the voltage at V3 through the fifth pull-up resistor R10, so that the third switch Q3 is turned on when the switching circuit 102 is in the on state.

[0118] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0119] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0120] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A control circuit for an aerosol generating device, characterized in that, include: A switching circuit, wherein a first terminal of the switching circuit is used to receive an enable signal, and a second terminal of the switching circuit is used to receive a first power supply; The first switching transistor has its collector connected to the third terminal of the switching circuit and the base of the first switching transistor, respectively. The second switch has its gate connected to the emitter of the first switch, and its source grounded. The collector of the third switching transistor is connected to the third terminal of the switching circuit and the base of the third switching transistor, respectively. The fourth switch is connected to the emitter of the third switch, and its source is grounded. A resonant circuit is connected in series between the drain of the second switch and the drain of the fourth switch; wherein a heating element is placed within the alternating magnetic field generated by the resonant circuit, and the heating element is used to heat the aerosol. A first inductor, the first end of which is used to connect to a second power supply, and the second end of which is connected to the gate of the second switching transistor and the drain of the fourth switching transistor respectively; The second inductor has a first end connected to the second power supply, and a second end connected to the gate of the fourth switch and the drain of the second switch.

2. The control circuit of the aerosol generating device according to claim 1, characterized in that, Also includes: The first diode has its anode connected to the emitter of the first switching transistor, and its cathode connected to the second terminal of the first inductor and the base of the first switching transistor, respectively. The second diode has its anode connected to the emitter of the third switching transistor, and its cathode connected to the second terminal of the second inductor and the base of the third switching transistor.

3. The control circuit of the aerosol generating device according to claim 1, characterized in that, Also includes: The third diode has its anode connected to the emitter of the first switching transistor and its cathode connected to the second terminal of the first inductor. The fourth diode has its anode connected to the emitter of the third switching transistor and its cathode connected to the second terminal of the second inductor.

4. The control circuit of the aerosol generating device according to claim 1, characterized in that, Also includes: A first pull-down resistor, the first end of which is connected to the gate of the second switching transistor, and the second end of which is grounded; The second pull-down resistor has its first end connected to the gate of the fourth switch and its second end grounded.

5. The control circuit of the aerosol generating device according to claim 1, characterized in that, The switching circuit includes: The fifth switching transistor has its base connected to the enable signal and its emitter grounded. The sixth switch has its base connected to the collector of the fifth switch, its emitter connected to the first power supply, and its collector connected to both the collector of the first switch and the collector of the third switch.

6. The control circuit of the aerosol generating device according to claim 5, characterized in that, Also includes: The first pull-up resistor is connected between the emitter of the first switch and the collector of the sixth switch. The second pull-up resistor is connected between the emitter of the third switch and the collector of the sixth switch.

7. The control circuit of the aerosol generating device according to claim 5, characterized in that, The switching circuit also includes: The third pull-up resistor is connected between the base and emitter of the sixth switch.

8. The control circuit of the aerosol generating device according to claim 5, characterized in that, The switching circuit also includes: The third pull-down resistor is connected between the base and emitter of the fifth switching transistor.

9. The control circuit of the aerosol generating device according to claim 5, characterized in that, The switching circuit also includes: A first current-limiting circuit is connected in series between the collector of the fifth switching transistor and the base of the sixth switching transistor.

10. The control circuit of the aerosol generating device according to claim 5, characterized in that, The switching circuit also includes: The second current limiting circuit has a first terminal for receiving the enable signal and a second terminal connected to the base of the fifth switching transistor.

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