Aerosol generating system, device, wireless charging circuit and charging method

Abstract

The embodiments of the present application belong to the field of wireless charging technology and relate to an aerosol generating system, device, wireless charging circuit, and charging method. The wireless charging circuit for the aerosol generating system includes: an aerosol generating module, including a first induction coil, a first capacitor, a resonance control switch, and an adjustment capacitor. The first induction coil receives power through electromagnetic induction, and the output end of the aerosol generating module is connected to a battery for charging; a charging module includes a transformer, a second capacitor, and a second induction coil. The transformer converts the mains voltage into an operating voltage, and the output end of the transformer is connected in series with the second induction coil; the output of the control module is connected to the control end of the resonance control switch. The present application changes the resonance parameters of the first induction coil by controlling the intermittent conduction and shutdown of the resonance control switch, affecting the frequency of electromagnetic induction and the charging current of the second induction coil, thereby reducing power consumption and saving electricity.

Description

Technical Field

[0001] The present application relates to the field of wireless charging technology, and more specifically, to an aerosol generating system, device, wireless charging circuit and charging method. Background Art

[0002] In the prior art, an aerosol generating device is inserted into a charging station, and a magnetic field is applied to the induction coil through electromagnetic induction, thereby causing the sensor to charge or discharge, so that the aerosol generating device can realize the functions of wireless charging and wireless discharging. However, the working states of the aerosol generating device and the charging station are relatively independent, and therefore it is impossible to predict the working state of the other party to regulate the energy of electromagnetic induction.

[0003] At the same time, existing aerosol generating devices capable of wireless charging require a separate induction coil for wireless charging, which cannot be used for other functions. When an aerosol generating device uses eddy current heating, two induction coils are required simultaneously—one for wireless charging and another for heating. This results in a complex structure, high cost, and large size. Summary of the Invention

[0004] The technical problem to be solved by the embodiments of the present application is to solve the problem of the aerosol generating device and the charging station working independently. In order to solve the above technical problem, the embodiments of the present application provide a wireless charging circuit for an aerosol generating system, which adopts the following technical solution:

[0005] The wireless charging circuit for the aerosol generating system includes:

[0006] An aerosol generating module includes a first induction coil, which receives power through electromagnetic induction. The output of the aerosol generating module is used to charge the battery. The aerosol generating module also includes a first capacitor, a resonance control switch, and an adjustment capacitor. The first capacitor and the first induction coil form a resonant circuit. The resonance control switch and the adjustment capacitor form a resonance parameter adjustment unit. The resonance parameter adjustment unit is connected to the resonant circuit.

[0007] The charging module includes a transformer, a second capacitor, and a second induction coil. The transformer converts the mains voltage into an operating voltage. The second capacitor and the second induction coil form a resonant circuit and are connected to the transformer. The first induction coil and the second induction coil are electromagnetically inductively coupled.

[0008] A control module, wherein the output of the control module is connected to the control end of the resonant control switch, and the control module controls the opening and closing of the resonant control switch to adjust the resonant parameters of the resonant circuit composed of the first induction coil.

[0009] Furthermore, the first capacitor and the first induction coil are connected in series, and the aerosol generating module also includes a first field effect transistor and a second field effect transistor; wherein, the source of the first field effect transistor is connected to the drain of the second field effect transistor, and is connected to the first capacitor; the gate of the first field effect transistor and the gate of the second field effect transistor are respectively connected to the control module of the aerosol generating module; the source of the second field effect transistor is grounded and connected to the first induction coil; the drain of the first field effect transistor is connected to a battery; the gate of the first field effect transistor and the gate of the second field effect transistor are respectively connected to the control module of the aerosol generating module.

[0010] Furthermore, the charging module also includes a resonant circuit and a rectifier circuit, wherein the rectifier circuit is connected in series between the resonant circuit and the transformer to rectify the AC voltage into a DC current; the resonant circuit is connected to the second induction coil to receive the DC current of the rectifier circuit and output the resonant current to the second induction coil.

[0011] Furthermore, the resonant circuit includes a second resistor, a third field-effect transistor and a fourth field-effect transistor, wherein the second capacitor, the second induction coil, the second resistor and the third field-effect transistor are connected in series in sequence, the source of the fourth field-effect transistor is connected to the drain of the third field-effect transistor, the drain of the fourth field-effect transistor is connected to the output end of the rectifier circuit, the fourth field-effect transistor is connected in series with the third field-effect transistor, the gate of the third field-effect transistor and the gate of the fourth field-effect transistor are respectively connected to the control module, the source of the third field-effect transistor is grounded, and the second capacitor is connected to the source of the fourth field-effect transistor, wherein the voltages at both ends of the second resistor are respectively connected to the control module.

[0012] Furthermore, the rectifier circuit is a bridge rectifier circuit.

[0013] Furthermore, the first induction coil is used for wireless charging and magnetic induction heating.

[0014] An embodiment of the present application further discloses an aerosol generating system, including the aforementioned wireless charging circuit, and the aerosol generating system further includes:

[0015] An aerosol generating device, comprising a battery, wherein the aerosol generating module is disposed within the aerosol generating device and is used to charge the battery; a first induction coil is disposed at one end of the aerosol generating device, and the aerosol generating device includes a control module for the aerosol generating module, wherein the control module for the aerosol generating module is connected to a control end of a resonant control switch in the aerosol generating module, and the control module for the aerosol generating module controls the opening and closing of the resonant control switch, thereby adjusting the resonant parameters of the resonant circuit formed by the first induction coil;

[0016] The charging base is provided with the charging module, and the charging base includes an insertion portion, a second induction coil is provided on the inner side of the insertion portion, and when the aerosol generating module is inserted into the insertion portion, the second induction coil generates electromagnetic induction with the first induction coil and transmits current to charge the battery.

[0017] The present application also provides an aerosol generating device, which includes a battery and an aerosol generating module. The aerosol generating module is used to charge the battery and heat the aerosol matrix. The aerosol generating module includes:

[0018] a first induction coil, receiving power through electromagnetic induction by the first induction coil;

[0019] a first capacitor, wherein the first capacitor and the first induction coil form a resonant circuit;

[0020] Resonant control switch;

[0021] an adjusting capacitor, wherein the resonance control switch and the adjusting capacitor form a resonance parameter adjusting unit, and the resonance parameter adjusting unit is connected to the resonant circuit;

[0022] The control module of the aerosol generating module is connected to the control end of the resonance control switch, and the control module of the aerosol generating module controls the opening and closing of the resonance control switch to adjust the resonance parameters of the resonant circuit composed of the first induction coil.

[0023] Furthermore, the first capacitor and the first induction coil are connected in series, and the aerosol generating module also includes a first field effect transistor and a second field effect transistor; wherein, the source of the first field effect transistor is connected to the drain of the second field effect transistor, and is connected to the first capacitor; the gate of the first field effect transistor and the gate of the second field effect transistor are respectively connected to the control module of the aerosol generating module; the source of the second field effect transistor is grounded and connected to the first induction coil; the drain of the first field effect transistor is connected to a battery; the gate of the first field effect transistor and the gate of the second field effect transistor are respectively connected to the control module of the aerosol generating module.

[0024] The present application also provides a charging method using the above-mentioned aerosol generating system, wherein the aerosol generating system includes an aerosol generating device and a charging base, wherein the aerosol generating device is provided with a battery, and a second resistor is provided in a resonant circuit of the charging base. The charging method includes the following steps:

[0025] The charging cradle is in a low-power standby mode, and the voltage across the second resistor in the charging cradle is monitored;

[0026] When the charging station detects that the voltage across the second resistor is greater than a first preset threshold, it is determined that an aerosol generating device is inserted into the charging station;

[0027] The charging station increases the resonant current;

[0028] The aerosol generating device generates an induced current to charge the battery;

[0029] When the aerosol generating device detects that the battery is fully charged, the resonance control switch of the aerosol generating device is controlled to be turned on according to a preset frequency;

[0030] When the charging station detects that the voltage across the second resistor is less than a second preset threshold, the charging station reduces the magnitude of the resonant current and switches to a low-power standby mode.

[0031] The aerosol generating device controls the resonance control switch to be cut off.

[0032] Compared with the prior art, the embodiments of the present application have the following main beneficial effects: by controlling the intermittent on and off of the resonant control switch, the resonant parameters of the first induction coil are changed, and feedback to the charging module is achieved when the battery is fully charged, thereby reducing the resonant current of the second induction coil, thereby reducing power consumption and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the solution of the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 This is a circuit diagram of the aerosol generating module;

[0035] Figure 2 This is a circuit diagram of the charging module;

[0036] Figure 3 A timing diagram of a wireless charging circuit for an aerosol generating system;

[0037] Figure 4 This is the overall structural diagram of the aerosol generating device;

[0038] Figure 5 is a vertical cross-sectional view of an aerosol generating device;

[0039] Figure 6 Flowchart of a charging method using an aerosol generating system.

[0040] Reference numerals:

[0041] 1 Aerosol generating device R1 First resistor 2 Charging station R2 Second resistor 11 First induction coil Q1 First field effect transistor 21 Second induction coil Q2 The second field effect transistor L1 First induction coil Q3 The third field effect transistor L2 Second induction coil Q4 The fourth field effect transistor C1 First capacitor Q5 Resonant control switch C2 Second capacitor D1 First diode C3 Adjustment capacitor D2 Second diode T1 transformer D3 The third diode A1 Rectifier circuit D4 Fourth diode A2 Resonant circuit DETAILED DESCRIPTION

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0043] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0044] An embodiment of the present application provides a wireless charging circuit for an aerosol generating system.

[0045] The wireless charging circuit includes:

[0046] An aerosol generating module includes a first induction coil, which receives power through electromagnetic induction. The output end of the aerosol generating module is used to charge the battery. The aerosol generating module also includes a first capacitor, a resonance control switch, and an adjustment capacitor. The first capacitor and the first induction coil form a resonant circuit. The resonance control switch and the adjustment capacitor form a resonance parameter adjustment unit. The resonance parameter adjustment unit is connected to the resonant circuit formed by the first induction coil;

[0047] A charging module includes a transformer, a second capacitor, and a second induction coil, wherein the transformer converts the mains voltage into an operating voltage, the second capacitor and the second induction coil form a resonant circuit, and the transformer is connected to the resonant circuit formed by the second induction coil, wherein the first induction coil and the second induction coil are electromagnetically inductively coupled.

[0048] A control module, wherein the output of the control module is connected to the control end of the resonant control switch, and the control module controls the opening and closing of the resonant control switch to adjust the resonant parameters of the resonant circuit formed by the first induction coil.

[0049] The aerosol generating module can also be used to receive power from a battery to heat the aerosol matrix to generate aerosol.

[0050] The following description uses as an example a first capacitor connected in series with a first induction coil, and a second capacitor connected in series with a second induction coil, each forming a series resonant circuit. It is understood that in a resonant circuit, a capacitor and an induction coil may also be connected in parallel to form a parallel resonant circuit.

[0051] The charging module steps down the input mains voltage, and the first induction coil in the aerosol generating module is combined with the second induction coil in the charging module for electromagnetic induction charging, so that the stepped-down working voltage is electromagnetically inductively transmitted from the second induction coil in the charging module to the first induction coil in the aerosol generating module, so that the first induction coil generates an induced current, and the control module controls the resonance control switch to be turned off, so that the current can flow through the battery for charging; when the battery is fully charged, the control module obtains a signal that the battery is fully charged, controls the resonance control switch to be turned on, and can connect the adjustment capacitor in parallel to the resonant circuit formed by the first induction coil, thereby reducing the resonant frequency of the resonant circuit formed by the first induction coil, and the circuit presents capacitive impedance, causing the charging current in the circuit to decrease, so that the resonant current of the resonant circuit in the charging module is reduced at the same time, thereby controlling the intermittent on and off of the resonance control switch to change the resonant parameters of the first induction coil, and realizing feedback to the charging module when the battery is fully charged, thereby reducing the resonant current of the second induction coil, thereby reducing power consumption and saving energy.

[0052] Of course, the adjustment capacitor can also be connected in series with the first induction coil. In this case, the resonance control switch is connected in parallel with the adjustment capacitor. When the resonance control switch is off, the adjustment capacitor is connected to the resonant circuit formed by the first induction coil. When the resonance control switch is on, the adjustment capacitor is not connected to the resonant circuit formed by the first induction coil. Therefore, before and after the resonance control switch is turned on, the capacitance of the resonant circuit formed by the first induction coil can be changed, thereby adjusting the resonant parameters of the resonant circuit to which it belongs.

[0053] It is understood that the connection method between the resonance control switch and the adjustment capacitor, as well as the on / off control method of the resonance control switch, can be specifically adapted according to the different forms of the resonant circuit formed by the first induction coil and the first capacitor. This is sufficient as long as the capacitance of the resonant circuit formed by the first induction coil can be changed in both the on and off states of the resonance control switch.

[0054] Based on the above-mentioned wireless charging circuit for an aerosol generating system, an embodiment of the present application further provides an aerosol generating system.

[0055] The aerosol generating system comprises:

[0056] An aerosol generating device, wherein the aerosol generating module is disposed within the aerosol generating device, a first induction coil is disposed at a charging end of the aerosol generating device, the aerosol generating device comprising a battery and a control module for the aerosol generating module, the aerosol generating module being configured to charge the battery, the control module for the aerosol generating module controlling the opening and closing of the resonance control switch according to whether the battery is fully charged, thereby adjusting the resonance parameters of the resonant circuit formed by the first induction coil;

[0057] A charging base, wherein the charging module is disposed on the charging base, and the charging base includes an insertion portion, wherein the insertion portion is provided with a second induction coil. When the aerosol generating device is inserted into the insertion portion, the second induction coil generates electromagnetic induction with the first induction coil and transmits current, i.e., charging the battery;

[0058] Wherein, the first induction coil and the second induction coil are charged by electromagnetic induction.

[0059] By structurally realizing electromagnetic induction between the aerosol generating device and the charging stand, and the control module adjusting the resonance parameters of the resonant circuit composed of the first induction coil, the intermittent on and off of the resonant control switch is controlled to change the resonance parameters of the first induction coil, and feedback to the charging module is realized when the battery is fully charged, thereby reducing the resonant current of the second induction coil, thereby reducing power consumption and saving energy.

[0060] The embodiment of the present application further provides an aerosol generating device, wherein the aerosol generating device has a charging circuit of an aerosol generating module and a battery built therein; wherein the charging circuit of the aerosol generating module is used to charge the battery, including:

[0061] a first induction coil, receiving power through electromagnetic induction by the first induction coil;

[0062] a first capacitor, wherein the first capacitor and the first induction coil form a resonant circuit;

[0063] Resonant control switch;

[0064] an adjusting capacitor, wherein the resonance control switch and the adjusting capacitor form a resonance parameter adjusting unit, and the resonance parameter adjusting unit is connected to the resonant circuit;

[0065] The control module of the aerosol generating module is connected to the control end of the resonance control switch. The control module of the aerosol generating module controls the opening and closing of the resonance control switch according to whether the battery is fully charged, thereby adjusting the resonance parameters of the resonant circuit composed of the first induction coil.

[0066] Based on the above-mentioned wireless charging circuit for an aerosol generating system, the aerosol generating system includes an aerosol generating device and a charging base. The aerosol generating device is provided with a battery, and a second resistor is provided in the resonant circuit of the charging base. The embodiment of the present application also provides a charging method for the wireless charging circuit for the aerosol generating system. The charging method for the wireless charging circuit for the aerosol generating system includes the following steps:

[0067] The charging cradle is in a low-power standby mode, and the voltage across the second resistor in the charging cradle is monitored;

[0068] When the charging station detects that the voltage across the second resistor is greater than a first preset threshold, it is determined that an aerosol generating device is inserted into the charging station;

[0069] The charging station increases the resonant current;

[0070] The aerosol generating device generates an induced current to charge the battery;

[0071] When the aerosol generating device detects that the battery is fully charged, the resonance control switch of the aerosol generating device is controlled to be turned on according to a preset frequency;

[0072] When the charging station detects that the voltage across the second resistor is less than a second preset threshold, the charging station reduces the magnitude of the resonant current and switches to a low-power standby mode.

[0073] The aerosol generating device controls the resonance control switch to be cut off.

[0074] This embodiment triggers an increase in the circuit voltage difference in the charging module when the aerosol generating device is inserted. Based on this increase, the charging module's frequency and charging current are increased. When the aerosol generating device is fully charged, the resonance parameters are changed and a fully charged signal is emitted. Based on the fully charged signal, the resonance control switch is turned on and off until the charging module enters a low-frequency standby state. This intermittent on-off control of the resonance control switch changes the resonance parameters of the first induction coil, providing feedback to the charging module when the battery is fully charged. This reduces the resonant current of the second induction coil, thereby reducing power consumption and conserving energy.

[0075] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0076] Example 1 of the wireless charging circuit for an aerosol generating system of the present application

[0077] Please refer to Figures 1 to 3 As shown, the wireless charging circuit for the aerosol generating system of the present application includes:

[0078] An aerosol generating module includes a first induction coil L1, which receives power through electromagnetic induction. The output end of the aerosol generating module is connected to a battery for charging. The aerosol generating module also includes a first capacitor C1, a resonance control switch Q5, and an adjustment capacitor C3. The first capacitor C1 and the first induction coil L1 are connected in series to form a resonant circuit. The resonance control switch Q5 and the adjustment capacitor C3 are connected in series to form a resonance parameter adjustment unit. The resonance parameter adjustment unit is connected in parallel with the first induction coil.

[0079] A charging module includes a transformer T1, a second capacitor C2, and a second induction coil L2. The transformer T1 converts the mains voltage into an operating voltage. The transformer T1 is connected in series with the second capacitor C2 and the second induction coil L2. The first induction coil L1 and the second induction coil L2 are electromagnetically inductively coupled.

[0080] A control module, wherein the output of the control module is connected to the control end of the resonant control switch Q5 , and the control module controls the opening and closing of the resonant control switch Q5 to adjust the resonant parameters of the resonant circuit formed by the first induction coil L1 .

[0081] By using the charging module to step down the input mains voltage, the first induction coil L1 in the aerosol generating module is combined with the second induction coil L2 in the charging module for electromagnetic induction charging, so that the stepped-down working voltage is electromagnetically inductively transmitted from the second induction coil L2 in the charging module to the first induction coil L1 in the aerosol generating module, so that the current in the aerosol generating module increases, and the control module controls the resonant control switch Q5 to turn off, so that the current can flow through the battery for charging. Conversely, when the battery is fully charged, the control module obtains a signal that the battery is fully charged, and controls the resonant control switch Q5 to turn on, thereby adjusting the capacitor C3 in parallel with the first induction coil L1, thereby reducing the resonant frequency of the resonant circuit formed by the first induction coil L1, and the circuit presents capacitive impedance, causing the charging current in the circuit to decrease, thereby reducing the resonant current flowing through the second induction coil in the charging module at the same time.

[0082] In this embodiment, the control module may specifically include a control module of the aerosol generating module and a control module of the charging module. The control module of the aerosol generating module controls the components in the aerosol generating module, and the control module of the charging module controls the components in the charging module.

[0083] The first induction coil L1 of the aerosol generating module can be in the shape of a vertical spiral, wherein the first induction coil L1 can spirally rise around the aerosol generating module. The first induction coil L1 can also be in the shape of a plane spiral. By utilizing the mutual inductance between the first induction coil L1 and the second induction coil L2, the electrical energy in the charging module is converted into magnetic energy and transmitted to the first induction coil L1 of the aerosol generating module. The first induction coil L1 of the aerosol generating module then converts the magnetic energy into electrical energy, stores it in the battery, and completes the charging. A magnetic isolation sheet can be added to the periphery of the second induction coil L2 to gather magnetic energy, thereby improving the energy conversion efficiency from the second induction coil L2 to the first induction coil L1 of the aerosol generating module. In this embodiment, the number of turns of the first induction coil L1 of the aerosol generating module is 9-10, the wire diameter is 1.2mm, and it contains a single strand of insulated copper wire, a total of about 200 strands, the inductance is about 10 microhenries to 10 henries, and the winding diameter is about 15mm. The number of turns of the second induction coil L2 of the charging module is greater than that of the first induction coil L1. Among them, the number of turns of the second induction coil L2 of the charging module is mainly 13-14, the wire diameter is 1.2mm, and it contains a single strand of insulated copper wire, with a total of about 200 strands. The inductance is about 10 microhenries to 10 henries, and the winding diameter is about 25mm.

[0084] In this embodiment, the aerosol generating module may further include a first field effect transistor Q1 and a second field effect transistor Q2, wherein the source of the first field effect transistor Q1 is connected to the drain of the second field effect transistor Q2 and to the first capacitor C1; the source of the second field effect transistor Q2 is grounded and connected to the first induction coil L1; the drain of the first field effect transistor Q1 is connected to a battery, and the gate of the first field effect transistor Q1 and the gate of the second field effect transistor Q2 are respectively connected to the control module of the aerosol generating module; the control module of the aerosol generating module is respectively connected to the gate of the first field effect transistor Q1 and the gate of the second field effect transistor Q2 and the base of the resonant control switch Q5, and then the control module of the aerosol generating module controls the first field effect transistor Q1, the second field effect transistor Q2 and the resonant control switch Q5 to be turned off, wherein the resonant parameters of the resonant circuit formed by the first induction coil are adjusted by controlling the opening and closing of the resonant control switch Q5.

[0085] The aerosol generating module can have a heating mode and a wireless charging mode, respectively used for heating the aerosol matrix and wireless charging. The first field-effect transistor Q1, the second field-effect transistor Q2, the first induction coil L1, and the first capacitor C1 form a half-bridge resonant electromagnetic heating circuit. In the wireless charging mode, the battery is powered, and the aerosol matrix can be heated by controlling the first field-effect transistor Q1 and the second field-effect transistor Q2 to be turned on and off by the control module of the aerosol generating module. On the basis of the half-bridge resonant electromagnetic heating circuit, by adding an adjustment capacitor C3 and a resonant control switch Q5, and cooperating with the control module of the aerosol generating module to control the first field-effect transistor Q1 and the second field-effect transistor Q2 to be turned on and off, the battery can be wirelessly charged. By reusing the first induction coil L1 and the half-bridge resonant electromagnetic heating circuit to construct a wireless charging circuit, the number of components used can be reduced, reducing costs and size. It can also reduce the setting of the charging interface, facilitating the waterproof and dustproof design of the aerosol generating device.

[0086] For example, the resonant frequency of the resonant circuit composed of the first induction coil L1 and the first capacitor C1 can be 200Khz. When the aerosol generating module is in the heating working mode, the control module of the aerosol generating module can provide a complementary PWM pulse control signal with a frequency of 200Khz to the gate of the first field effect transistor Q1 and the second field effect transistor Q2, so that the first field effect transistor Q1 and the second field effect transistor Q2 are complementary turned on at a frequency of 200Khz, generating a high-frequency current that changes rapidly and flows through the first induction coil L1 to generate a high-frequency alternating magnetic field. The heating element is placed in the alternating magnetic field, which can induce eddy currents and generate heat, thereby heating the aerosol matrix and generating aerosol. It can be understood that the resonant frequency of the resonant circuit composed of the first induction coil L1 and the first capacitor C1 can also be other values.

[0087] The heating element can be made of any material that can generate an induced current in an alternating magnetic field, with metal, such as iron, being the most common. It is understood that the heating element can be a component of the aerosol generating device and can be positioned at the center of the first induction coil L1. The heating element can also be independent of the aerosol generating device and built into the aerosol matrix; when the aerosol matrix is ​​inserted into the aerosol generating device, the heating element is positioned at the center of the first induction coil L1.

[0088] When the aerosol generating device is plugged into the charging station and in wireless charging mode, the AC voltage of the second induction coil L2 is induced to the first induction coil L1. The induced current is rectified by the first field-effect transistor Q1 and the second field-effect transistor Q2 and then output to the battery VBAT, completing wireless charging. The resonant current of the second induction coil L2 can be configured to be relatively low (for example, the resonant current in wireless charging mode can be 500mA, while the current flowing through the first induction coil when the heating element is operating normally is generally 1A-4A), so that the induced eddy current energy is insufficient to cause the heating element to generate too much heat.

[0089] In this embodiment, in order to reduce the temperature of the heating element caused by magnetic induction during wireless charging and reduce the problem of energy waste caused by this, a magnetic isolation ring can be set at the center of the charging base. When the aerosol generating device is inserted into the charging base, the heating element is inserted into the magnetic isolation ring, so that the heating element will not be affected by the magnetic field of wireless charging.

[0090] In other embodiments, in order to reduce the power loss caused by the induced heating of the heating element during wireless charging, the operating frequency of the first induction coil L1 of the aerosol generating device in the heating working mode can be different from the operating frequency of the first induction coil L1 during wireless charging, and the difference between the two can even be quite large.

[0091] Of course, in another embodiment, the first induction coil L1 , the second field effect transistor Q2 and the first capacitor C1 are connected in parallel and connected to the source of the first field effect transistor Q1 , wherein the first induction coil L1 and the first capacitor C1 form a parallel resonant circuit.

[0092] Charging process: The induced current (i.e., charging current) on the first induction coil L1 can have a positive half-cycle and a negative half-cycle. When the induced current is in the positive half-cycle (taking the current direction on the first induction coil L1 as an example), the control module of the aerosol generating module controls the first field effect transistor Q1 to turn on and cuts off the second field effect transistor Q2. The induced current passes through the first capacitor C1 and the first field effect transistor Q1 to charge the battery. When the induced current is in the negative half-cycle (taking the current direction on the first induction coil L1 as an example), the first field effect transistor Q1 is controlled to be cut off and the second field effect transistor Q2 is turned on. The induced current passes through the second field effect transistor Q2 and forms a loop with the first capacitor C1.

[0093] In this embodiment, the aerosol generating module further includes a first resistor R1, which is connected to the control terminal of the resonant control switch Q5. The first resistor R1 primarily limits the magnitude of the current between the source of the resonant control switch Q5 and the control module. One end of the regulating capacitor C3 is connected to the collector of the resonant control switch Q5, the emitter of the resonant control switch Q5 is grounded, one end of the first induction coil L1 is connected to the other end of the regulating capacitor C3, and the other end of the first induction coil L1 is connected to the emitter of the resonant control switch Q5.

[0094] Specifically, compared with the original electromagnetic heating circuit, the circuit of the present application has an additional resonance parameter adjustment unit composed of a first resistor R1, an adjustment capacitor C3, and a resonance control switch Q5. During heating, or during wireless charging, and when the battery is not fully charged, the resonance control switch Q5 is cut off. When the control module in the aerosol generating device detects that the battery is full, the resonance control switch Q5 is intermittently turned on and off according to a self-defined protocol to change the resonance parameters of the resonant circuit composed of the first induction coil L1: when the resonance control switch Q5 is turned on, the adjustment capacitor C3 is connected in parallel to both ends of the first induction coil L1; from the formula It can be seen that when the capacitor C increases, the resonant frequency F decreases and deviates from the original operating frequency, and the circuit presents capacitive impedance, which causes the charging current in the circuit to decrease, thereby reducing the resonant current of the resonant circuit in the charging module. The resonant circuit of the charging module may include a second resistor R2. The charging module detects that the voltage across the second resistor R2 increases or decreases with the protocol to form a pulse signal (such as Figure 3 As shown, the device receives a fully charged signal from the aerosol generating device, and then reduces the frequency of the resonant current flowing through the second induction coil to 1 / 10 of the resonant frequency of the second induction coil L2 and the second capacitor C2, thereby reducing the magnitude of the resonant current and achieving the effect of reducing power consumption, i.e., low-power mode. The second resistor R2 is used to monitor the magnitude of the resonant current flowing through the second induction coil L2 to determine whether the aerosol generating device is inserted into the charging dock and whether the aerosol generating device is fully charged. The voltage across the second resistor R2 is respectively connected to the control module of the charging module.

[0095] In this embodiment, the charging module includes a resonant circuit A2 and a rectifier circuit A1, wherein the rectifier circuit A1 is connected in series between the resonant circuit A2 and the transformer T1, the input end of the rectifier circuit A1 is connected to the output end of the transformer T1, and the output end of the rectifier circuit A1 is connected to the input end of the resonant circuit A2. The transformer T1 is used to rectify the AC voltage into a DC voltage. The resonant circuit A2 is connected to the second induction coil L2 to receive the DC voltage of the rectifier circuit A1 and output a resonant current to the second induction coil L2. The resonant circuit A2 includes a second capacitor C2, a third field-effect transistor Q3, and a fourth field-effect transistor Q4, wherein the second capacitor C2, the second induction coil L2, the second resistor R2, and the third field-effect transistor Q3 are connected in series in sequence, the source of the fourth field-effect transistor Q4 is connected to the drain of the third field-effect transistor Q3, the drain of the fourth field-effect transistor Q4 is connected to the output end of the rectifier circuit A1, the fourth field-effect transistor Q4 is connected in series with the third field-effect transistor Q3, the source of the third field-effect transistor Q3 is grounded, the second capacitor C2 is connected to the source of the fourth field-effect transistor Q4, the gate of the third field-effect transistor Q3 and the gate of the fourth field-effect transistor Q4 are respectively connected to the control module of the charging module, and the control module of the charging module controls the conduction and cutoff of the third field-effect transistor Q3 and the fourth field-effect transistor Q4.

[0096] The rectifier circuit A1 can be a half-wave rectifier circuit, a full-wave rectifier circuit, or a bridge rectifier circuit. For example, the rectifier circuit A1 can be specifically a bridge rectifier circuit, including a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4, wherein the first diode D1 is connected in series with the second diode D2, the third diode D3 is connected in series with the fourth diode D4, the first output end of the transformer T1 is connected to the anode of the first diode D1, the second output end of the transformer T1 is connected to the anode of the fourth diode D4, the anode of the second diode D2 and the anode of the third diode D3 are both grounded, and the cathode of the first diode D1 and the cathode of the fourth diode D4 are both connected to the drain of the fourth field-effect transistor Q4.

[0097] It should be noted that transformer T1 converts the 220V AC mains voltage into a 5V AC operating voltage, which is then rectified by a rectifier bridge consisting of a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4 to output a DC current. A second capacitor C2, a second resistor R2, a third field-effect transistor Q3, and a fourth field-effect transistor Q4 form a resonant circuit A2, which converts the DC current into a resonant output current and outputs it to the second induction coil L2. The electromagnetically heated aerosol generating module then charges after induction.

[0098] Among them, the gate of the third field effect transistor Q3 and the gate of the fourth field effect transistor Q4 are respectively connected to the control module of the charging module, and the control module of the charging module outputs a charging current control signal for the charging module, which is specifically a complementary PWM pulse signal in this embodiment. The third field effect transistor Q3 and the fourth field effect transistor Q4 are driven by the complementary PWM pulse signal output by the control module of the charging base. The PWM pulse signal has a fixed 50% duty cycle. In the standby state, the frequency of the WM pulse signal is 1 / 10 of the resonant frequency of the second induction coil L2 and the second capacitor C2, which is intended to reduce power consumption; when the aerosol generating module is inserted into the charging module , the current flowing through the second induction coil L2 and the second resistor R2 increases, and the voltage value across the second resistor R2 increases. By collecting the voltage across the second resistor R2 (MCU_AD1, MCU_AD2) and outputting it to the control module of the charging module, it can be recognized that the aerosol generating module is plugged in for charging. At this time, the control module of the charging module gradually increases the frequency of the charging current control signal, so that the frequency of the resonant current flowing through the second induction coil L2 is increased until it approaches the resonant frequency of the second induction coil L2 and the second capacitor C2, and the magnitude of the resonant current also reaches the set charging current. The magnitude of the resonant current can still be determined by collecting the voltage across the second resistor R2.

[0099] In this embodiment, the mains voltage is stepped down by the charging module, and the first induction coil L1 in the aerosol generating module is combined with the second induction coil L2 in the charging module to perform electromagnetic induction charging, so that the stepped-down working voltage is electromagnetically inductively transmitted from the second induction coil L2 in the charging module to the first induction coil L1 in the aerosol generating module, so that the current in the aerosol generating module increases, and the control module of the aerosol generating module controls the resonant control switch Q5 to be turned off, so that the current can flow to the battery for charging. On the contrary, when the battery is fully charged, the aerosol generating module The control module receives a signal indicating that the battery is fully charged, and controls the resonant control switch Q5 to turn on. The resonant control switch Q5 is connected in parallel with the first induction coil L1, thereby reducing the frequency and presenting a capacitive impedance in the loop, which reduces the charging current in the loop. As a result, the resonant current of the resonant circuit in the charging module is also reduced. The intermittent on and off control of the resonant control switch Q5 changes the resonant parameters of the first induction coil L1, and feedback is provided to the charging module when the battery is fully charged, thereby reducing the resonant current of the second induction coil L2, thereby reducing power consumption and saving energy.

[0100] Example 2 of the aerosol generating system of the present application

[0101] Please refer to Figures 4 and 5 As shown, the aerosol generating system includes an aerosol generating device 1 and a charging base 2:

[0102] The aerosol generating device 1 is provided with a battery and an aerosol generating module, wherein the aerosol generating module is used to charge the battery and heat the aerosol matrix; the aerosol generating module includes:

[0103] a first induction coil L1, receiving power through electromagnetic induction of the first induction coil L1;

[0104] A first capacitor C1 is connected to the first induction coil L1 to form a resonant circuit;

[0105] A resonance control switch Q5 and an adjustment capacitor C3, wherein the resonance control switch Q5 and the adjustment capacitor C3 are connected in series to form a resonance parameter adjustment unit, and the resonance parameter adjustment unit is connected to the resonant circuit formed by the first induction coil L1;

[0106] a control module of the aerosol generating module, connected to the control end of the resonance control switch Q5, and the control module controls the opening and closing of the resonance control switch Q5, thereby controlling the connection or disconnection of the adjustment capacitor to the first induction coil L1, thereby adjusting the resonance parameters of the resonant circuit formed by the first induction coil L1;

[0107] A charging module is provided in the charging base 2, and the charging base 2 is provided with an insertion part. The insertion part is provided with a second induction coil 21. When the aerosol generating module 2 is inserted into the insertion part, the second induction coil 21 and the first induction coil 11 generate electromagnetic induction and transmit current to charge the battery.

[0108] The specific structure and working mode of the aerosol generating module in the aerosol generating device and the charging module in the charging base can be found in the previous embodiments and will not be repeated here.

[0109] In some embodiments, the aerosol generating device 1 may also be provided with a heating element for inducing the magnetic field generated by the first induction coil L1 to generate heat. A heating cavity may be provided at one end of the aerosol generating device 1, the first induction coil L1 may be provided around the heating cavity, and the heating element may be provided in the heating cavity and located at the center of the first induction coil L1. The aerosol matrix may be inserted into the heating cavity, and the heating element may extend into the aerosol matrix; when the heating element generates heat, the aerosol matrix may be heated to generate an aerosol. When wireless charging is required, one end of the first induction coil L1 may be provided, which may be inserted into the insertion portion of the charging stand 2, and the battery of the aerosol generating device may be charged through the induction of the first induction coil L1 and the second induction coil L2.

[0110] In this embodiment, the charging module steps down the input mains voltage, and the first induction coil 11 in the aerosol generating device 1 is combined with the second induction coil 21 in the charging module for electromagnetic induction charging, so that the stepped-down working voltage is electromagnetically induction-transmitted from the second induction coil 21 in the charging module to the first induction coil 11, so that the first induction coil 11 generates an induced current. The control module of the aerosol generating module controls the resonance control switch to be turned off, and the current can flow through the battery for charging. On the contrary, when the battery is fully charged and the control module of the aerosol generating module obtains a signal indicating that the battery is fully charged, it controls the resonance control switch to be turned on, and adjusts the capacitor to be connected in parallel with the first induction coil and in series with the first capacitor to form a resonant circuit, so that the resonant frequency of the resonant circuit becomes smaller, and the circuit presents a capacitive impedance, causing the charging current in the circuit to become smaller, thereby reducing the resonant current in the charging module at the same time, and realizing the intermittent on and off control of the resonance control switch to change the resonant parameters of the first induction coil 11, realizing feedback to the charging module when the battery is fully charged, thereby reducing the resonant current of the second induction coil 21, thereby reducing power consumption and saving energy.

[0111] Example 3 of the Charging Method of the Wireless Charging Circuit for the Aerosol Generating System of the Present Application

[0112] Referring to FIG6 , the charging method of the wireless charging circuit for the aerosol generating system includes the following steps:

[0113] Step S101: The charging base is in a low-power standby mode, and the voltage across the second resistor in the charging base is monitored;

[0114] Step S102: When the charging station detects that the voltage across the second resistor is greater than a first preset threshold, it is determined that an aerosol generating device is inserted into the charging station;

[0115] Step S103, the charging station increases the resonant current;

[0116] Step S104: the aerosol generating device generates an induced current to charge the battery;

[0117] Step S105, when the aerosol generating device detects that the battery is fully charged, the resonance control switch of the aerosol generating device is controlled to be turned on according to a preset frequency;

[0118] Step S106: When the charging station detects that the voltage across the second resistor is less than a second preset threshold, the charging station reduces the magnitude of the resonant current and enters a low-power standby mode.

[0119] Step S107: the aerosol generating device controls the resonance control switch to be turned off.

[0120] In step S107 , the resonance control switch may be turned off after the resonance control switch is turned on for a preset time; or the resonance control switch may be turned off after it is detected that the resonance current of the charging station becomes smaller.

[0121] The charging module steps down the input mains voltage, and the first induction coil in the aerosol generating module is combined with the second induction coil in the charging module to perform electromagnetic induction charging, so that the stepped-down working voltage is electromagnetically inductively transmitted from the second induction coil in the charging module to the first induction coil in the aerosol generating module, causing the first induction coil to generate an induced current. The control module controls the resonance control switch to turn off, and the current can flow through the battery for charging. When the battery is fully charged, the control module obtains a signal that the battery is fully charged, controls the resonance control switch to turn on, changes the resonant frequency of the resonant circuit where the first induction coil is located, and the circuit presents a capacitive impedance, causing the charging current in the circuit to decrease, thereby reducing the resonant current of the resonant circuit in the charging module at the same time, and realizing the intermittent on and off of the control resonance control switch to change the resonant parameters of the first induction coil, realizing feedback to the charging module when the battery is fully charged, thereby reducing the resonant current of the second induction coil, thereby reducing power consumption and saving electricity.

[0122] Of course, the regulating capacitor may also be connected in series with the first induction coil. In this case, the resonance control switch is connected in parallel with the regulating capacitor.

[0123] The specific working methods of the aerosol generating device and the charging stand can be found in the description of the previous embodiments and will not be repeated here.

[0124] This embodiment triggers an increase in the circuit voltage difference in the charging module when the aerosol generating device is inserted. Based on this increase, the charging module's frequency and charging current are increased. When the aerosol generating device is fully charged, the resonance parameters are changed and a fully charged signal is emitted. Based on the fully charged signal, the resonance control switch is turned on and off until the charging module enters a low-frequency standby state. This intermittent on-off control of the resonance control switch changes the resonance parameters of the first induction coil, providing feedback to the charging module when the battery is fully charged. This reduces the resonant current of the second induction coil, thereby reducing power consumption and conserving energy.

[0125] Obviously, the embodiments described above are only some of the embodiments of the present application, rather than all of the embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present application specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present application.

Claims

1. A wireless charging circuit for an aerosol generating system, characterized in that: The wireless charging circuit for the aerosol generating system includes: An aerosol generating module includes a first induction coil, which receives power through electromagnetic induction. The output of the aerosol generating module is used to charge the battery. The aerosol generating module also includes a first capacitor, a resonance control switch, and an adjustment capacitor. The first capacitor and the first induction coil form a resonant circuit. The resonance control switch and the adjustment capacitor form a resonance parameter adjustment unit. The resonance parameter adjustment unit is connected to the resonant circuit. The charging module includes a transformer, a second capacitor, and a second induction coil. The transformer converts the mains voltage into an operating voltage. The second capacitor and the second induction coil form a resonant circuit and are connected to the transformer. The first induction coil and the second induction coil are electromagnetically inductively coupled. a control module, wherein the output of the control module is connected to the control end of the resonant control switch, and the control module controls the opening and closing of the resonant control switch to adjust the resonant parameters of the resonant circuit formed by the first induction coil; The first capacitor and the first induction coil are connected in series, and the aerosol generating module further includes a first field effect transistor and a second field effect transistor; wherein the source of the first field effect transistor is connected to the drain of the second field effect transistor and is also connected to the first capacitor; the gate of the first field effect transistor and the gate of the second field effect transistor are respectively connected to the control module of the aerosol generating module; the source of the second field effect transistor is grounded and connected to the first induction coil; the drain of the first field effect transistor is connected to a battery; the gate of the first field effect transistor and the gate of the second field effect transistor are respectively connected to the control module of the aerosol generating module; The control module is respectively connected to the gate of the first field-effect transistor, the gate of the second field-effect transistor, and the base of the resonant control switch, and then the control module controls the first field-effect transistor, the second field-effect transistor, and the resonant control switch to be turned off. The resonant parameters of the resonant circuit formed by the first induction coil are adjusted by controlling the on and off of the resonant control switch.

2. The wireless charging circuit for an aerosol generating system according to claim 1, characterized in that: The charging module also includes a resonant circuit and a rectifier circuit, wherein the rectifier circuit is connected in series between the resonant circuit and the transformer to rectify the AC voltage into a DC current; the resonant circuit is connected to the second induction coil to receive the DC current from the rectifier circuit and output the resonant current to the second induction coil.

3. The wireless charging circuit for an aerosol generating system according to claim 2, wherein: The resonant circuit includes a second resistor, a third field-effect transistor, and a fourth field-effect transistor, wherein the second capacitor, the second induction coil, the second resistor, and the third field-effect transistor are connected in series in sequence, the source of the fourth field-effect transistor is connected to the drain of the third field-effect transistor, the drain of the fourth field-effect transistor is connected to the output end of the rectifier circuit, the fourth field-effect transistor is connected in series with the third field-effect transistor, the gate of the third field-effect transistor and the gate of the fourth field-effect transistor are respectively connected to the control module, the source of the third field-effect transistor is grounded, and the second capacitor is connected to the source of the fourth field-effect transistor, wherein both ends of the second resistor are respectively connected to the control module.

4. The wireless charging circuit for an aerosol generating system according to claim 3, wherein: The rectifier circuit is a bridge rectifier circuit.

5. The wireless charging circuit for an aerosol generating system according to claim 1, wherein: The first induction coil is used for wireless charging and magnetic induction heating.

6. An aerosol generating system, characterized in that: The aerosol generating system comprises the wireless charging circuit according to any one of claims 1 to 5, and further comprises: An aerosol generating device, comprising a battery, wherein the aerosol generating module is disposed within the aerosol generating device and is used to charge the battery; a first induction coil is disposed at one end of the aerosol generating device, and the aerosol generating device includes a control module for the aerosol generating module, wherein the control module for the aerosol generating module is connected to a control end of a resonant control switch in the aerosol generating module, and the control module for the aerosol generating module controls the opening and closing of the resonant control switch, thereby adjusting the resonant parameters of the resonant circuit formed by the first induction coil; The charging base is provided with a charging module, and the charging base includes an insertion portion, and the insertion portion is provided with a second induction coil. When the aerosol generating module is inserted into the insertion portion, the second induction coil generates electromagnetic induction with the first induction coil and transmits current to charge the battery.

7. An aerosol generating device, characterized in that: The aerosol generating device is equipped with a battery and an aerosol generating module, and the aerosol generating module is used to charge the battery and heat the aerosol matrix, wherein the aerosol generating module includes: a first induction coil, receiving power through electromagnetic induction by the first induction coil; a first capacitor, wherein the first capacitor and the first induction coil form a resonant circuit; Resonant control switch; an adjusting capacitor, wherein the resonance control switch and the adjusting capacitor form a resonance parameter adjusting unit, and the resonance parameter adjusting unit is connected to the resonant circuit; a control module of the aerosol generating module, the control module of the aerosol generating module being connected to the control end of the resonance control switch, and the control module of the aerosol generating module controlling the opening and closing of the resonance control switch to thereby adjust the resonance parameters of the resonant circuit formed by the first induction coil; The first capacitor and the first induction coil are connected in series, and the aerosol generating module further includes a first field effect transistor and a second field effect transistor; wherein the source of the first field effect transistor is connected to the drain of the second field effect transistor and is also connected to the first capacitor; the gate of the first field effect transistor and the gate of the second field effect transistor are respectively connected to the control module of the aerosol generating module; the source of the second field effect transistor is grounded and connected to the first induction coil; the drain of the first field effect transistor is connected to a battery; the gate of the first field effect transistor and the gate of the second field effect transistor are respectively connected to the control module of the aerosol generating module; The control module is respectively connected to the gate of the first field-effect transistor, the gate of the second field-effect transistor, and the base of the resonant control switch, and then the control module controls the first field-effect transistor, the second field-effect transistor, and the resonant control switch to be turned off. The resonant parameters of the resonant circuit formed by the first induction coil are adjusted by controlling the on and off of the resonant control switch.

8. A charging method using the aerosol generating system according to claim 6, wherein the aerosol generating system comprises an aerosol generating device and a charging stand, wherein the aerosol generating device is provided with a battery, characterized in that: A second resistor is provided in the resonant circuit of the charging base, and the charging method comprises the following steps: The charging cradle is in a low-power standby mode, and the voltage across the second resistor in the charging cradle is monitored; When the charging station detects that the voltage across the second resistor is greater than a first preset threshold, it is determined that an aerosol generating device is inserted into the charging station; The charging station increases the resonant current; The aerosol generating device generates an induced current to charge the battery; When the aerosol generating device detects that the battery is fully charged, the resonance control switch of the aerosol generating device is controlled to be turned on according to a preset frequency; When the charging station detects that the voltage across the second resistor is less than a second preset threshold, the charging station reduces the magnitude of the resonant current and switches to a low-power standby mode. The aerosol generating device controls the resonance control switch to be cut off.

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