Atomization circuit based on wireless electric energy transmission and wireless atomization device

Abstract

The utility model relates to an atomization circuit and a wireless atomization device based on wireless electric energy transmission, which comprise a driving unit, the output end of the driving unit is connected with the input end of a primary energy supply unit, and the output end of the primary energy supply unit is connected with the input end of a secondary atomization unit through an electromagnetic field; the output end of the secondary atomization unit is connected with the input end of the atomization device, the input end of the detection unit is connected with the output end of the primary energy supply unit, and the feedback end of the detection unit is connected with the input end of the driving unit. The secondary atomization unit is simple in structure, after electromagnetic energy transmitted from the primary driving unit is induced into current, an atomization device in the secondary atomization unit can be directly driven to conduct atomization, complex transformation such as rectification and inversion is not needed, the secondary atomization unit is directly connected with the solution containing cavity of the atomizer, and the atomization effect is good. No physical electrical connection exists when the atomizer body driving circuit is used, and a user can add a solution conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, and relates to an atomization circuit based on wireless power transmission, and in particular to an atomization circuit and a wireless atomization device based on wireless power transmission. Background Art

[0002] A nebulizer is a device that converts a liquid into a gas or mist-like particles. In recent years, their use has become increasingly common. In the medical field, nebulizers convert liquid medications into a gas that is delivered to the patient through breathing, treating respiratory ailments such as coughs, pharyngitis, respiratory infections, bronchitis, and pneumonia. In daily life, nebulizers can convert water into gas to increase air humidity, or convert aromatherapy solutions into tiny particles that blend into the air, creating a fresh and pleasant environment. In clothing maintenance, nebulizers convert water or maintenance solutions into mist-like particles that are sprayed onto clothing to remove wrinkles, maintain its appearance, and cleanse it.

[0003] At present, according to the working principle of atomization, atomizers are mainly divided into three types: ultrasonic atomizers, compression atomizers, and mesh atomizers.

[0004] Ultrasonic atomizer: This device uses ultrasonic vibrations to create atomization of liquid. This type of atomizer can produce tiny particles that are evenly dispersed into the air.

[0005] Compression atomizer: Based on the Venturi jet principle, compressed air forms a high-speed airflow, generating negative pressure to spray the liquid onto the obstruction. The liquid disperses into mist particles under high-speed impact. This type of atomizer can produce smaller mist particles.

[0006] Mesh atomizers: These use a vibrator that vibrates up and down, squeezing liquid through the holes in a nozzle-shaped mesh spray head, turning it into mist particles. These atomizers are small, portable, and very quiet.

[0007] The working principles of the atomizers described above determine that they have different advantages and limitations in actual application. In existing atomizers, whether they are ultrasonic atomizers, compression atomizers, or mesh atomizers, the storage chamber for supplying the solution to be atomized is fixedly connected to the atomizer body (including the drive circuit and structure), or there is a physical electrical connection. This causes the user to move the entire atomizer when adding solution, causing great inconvenience and inconvenient cleaning and maintenance of the atomizer; for some special environments (such as narrow, tortuous structures), it may even be difficult to add solution, making it impossible to use the atomizer.

[0008] Although there are atomizers with self-detachable solution chambers on the market, when in use, a water pump is used to pump the solution to the atomization area through a pipe. In essence, there is still a physical connection, and the device has the disadvantages of being large in size and generating noise. Utility Model Content

[0009] In order to solve the above technical problems, the purpose of the present utility model is to provide an atomization circuit and a wireless atomization device based on wireless power transmission.

[0010] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0011] An atomization circuit based on wireless power transmission includes a driving unit for providing a PWM driving wave, and the frequency and duty cycle of the PWM wave can be adjusted. The output end of the driving unit is connected to the input end of the main power supply unit;

[0012] The primary energy supply unit is used to convert the electrical energy of the PWM wave into electromagnetic energy. The output end of the primary energy supply unit and the input end of the secondary atomization unit transmit electrical energy through the electromagnetic field and are wirelessly connected in this way;

[0013] A secondary atomization unit is used to convert electromagnetic energy into electrical energy and drive the atomization device to perform atomization, wherein the output end of the secondary atomization unit is connected to the input end of the atomization device;

[0014] The detection unit is used to detect the driving current, the input end of the detection unit is connected to the output end of the main-stage energy supply unit, and the feedback end of the detection unit is connected to the input end of the driving unit.

[0015] Preferably, in the atomization circuit based on wireless power transmission, the driving unit includes an MCU and a first driving circuit module and a second driving circuit module. One PWM output pin of the MCU is connected to the input end of the first driving circuit module, and the output end of the first driving circuit module is connected to the input end PWM_OUT1 of the main energy supply unit. Another PWM output pin of the MCU is connected to the input end of the second driving circuit module, and the output end of the second driving circuit module is connected to the input end PWM_OUT2 of the main energy supply unit. The input PWM waveforms of the first driving circuit module and the second driving circuit module are complementary.

[0016] Preferably, in the atomization circuit based on wireless power transmission, the MCU model is STM32F030, or GD32E230, or any other MCU with PWM wave output function.

[0017] Preferably, in the atomization circuit based on wireless power transmission, the first driving circuit module includes a gate driver chip IC1, the third pin of the gate driver chip IC1 is connected to the eighteenth pin of the MCU through a resistor R1, the seventh pin of the gate driver chip IC1 is connected to the gate of the MOS transistor Q1 through a resistor R3, the gate of the MOS transistor Q1 is connected to the source of the MOS transistor Q1 through a resistor R4, the drain of the MOS transistor Q1 is connected to the VDS terminal, and the source of the MOS transistor Q1 is connected to the drain of the MOS transistor Q2. At the same time, the source of the MOS transistor Q1 is connected to the sixth pin of the gate driver chip IC1 and the source of the MOS transistor Q1 is connected to the PWM_OUT1 of the main power supply unit. The fifth pin of the gate driver chip IC1 is connected to the gate of the MOS transistor Q2 through a resistor R5, the gate of the MOS transistor Q2 is connected to the source of the MOS transistor Q2 through a resistor R6 and is connected to the ADC_GND terminal. VDS is provided by VDD through a diode, and the DC voltage range of the VDD terminal is 5 to 56V. The gate driver chip converts the low-voltage PWM waveform output by the MCU into two PWM gate control signals, which control the alternating conduction of the upper and lower MOSFETs, thereby generating a high-voltage PWM signal. Gate driver IC1 can be any of the IR2104, IR2101, LM5107, or EG2121, or any other gate driver chip that implements the same gate drive function. Optionally, a diode can be connected in parallel with resistors R3 and R5 to reduce level conversion time.

[0018] Preferably, in the atomization circuit based on wireless power transmission, the second drive circuit module includes a gate driver chip IC2, the third pin of the gate driver chip IC2 is connected to the fourteenth pin of the MCU through a resistor R2, the seventh pin of the gate driver chip IC2 is connected to the gate of the MOS transistor Q3 through a resistor R7, the gate of the MOS transistor Q3 is connected to the source of the MOS transistor Q3 through a resistor R8, the drain of the MOS transistor Q3 is connected to the VDS terminal, and the source of the MOS transistor Q3 is connected to the drain of the MOS transistor Q4. At the same time, the source of the MOS transistor Q3 is connected to the sixth pin of the gate driver chip IC2, and the source of the MOS transistor Q3 is connected to PWM_OUT2 of the main power supply unit. The fifth pin of the gate driver chip IC2 is connected to the gate of the MOS transistor Q4 through a resistor R9, and the gate of the MOS transistor Q4 is connected to the source of the MOS transistor Q4 through a resistor R10 and is connected to the ADC_GND terminal. VDS is provided by VDD through a diode, and the DC voltage range of the VDD terminal is 5 to 56V. The gate driver chip IC2 is any one of IR2104, IR2101, LM5107, or EG2121. A diode is connected in parallel to resistors R7 and R9. Optionally, a diode can be connected in parallel to resistors R7 and R9. Gate driver chips IC1 and IC2 are the same chip model.

[0019] Preferably, the specific type of the MOS can also be NMOS, PMOS, PNP transistor, NPN transistor, and the corresponding gate driver chip IC1 and gate driver chip IC2, as well as the appropriate connection method, need to be selected according to actual use.

[0020] Preferably, in the atomization circuit based on wireless power transmission, the frequency of the PWM wave is between 50kHz and 200kHz. Optionally, the frequency or duty cycle of the PWM wave is automatically adjusted according to actual needs.

[0021] Preferably, in the aforementioned wireless power transmission-based atomization circuit, the primary power supply unit is an induction coil. Preferably, the induction coil contains a ferromagnetic material such as ferrite or silicon steel sheet, such as an I-shaped inductor, T-shaped inductor, or other shaped inductors, or a combination of a coil and a magnetic core. The atomizer with the secondary atomization unit is mounted on the primary power supply unit in a plug-in or close-fitting manner. The two ends of the induction coil are connected to the PWM_OUT1 output of the first drive unit and the PWM_OUT2 output of the second drive unit, respectively.

[0022] Preferably, in the atomization circuit based on wireless power transmission, the secondary atomization unit includes an induction coil and an atomization sheet, the induction coil and the atomization sheet are connected, and the induction coil is connected to the primary energy supply unit through electromagnetic field induction. Specifically, the electromagnetic field generated on the induction coil of the primary energy supply unit will induce a secondary drive current on the induction coil of the secondary atomization unit through the action of electromagnetic induction. The secondary drive current directly drives the atomization sheet without the need for complex transformations such as rectification and inversion. The secondary atomization unit is directly connected to the solution storage chamber of the atomizer and has no physical electrical connection with the atomizer main drive circuit when in use, making it convenient for users to add solution. Optionally, a capacitor, inductor or resistor can be connected in series between the induction coil and the atomization sheet.

[0023] Preferably, in the atomization circuit based on wireless power transmission, the detection unit includes a sampling resistor R12, a filter capacitor C1 and a filter resistor R11, one end of the sampling resistor R12 is connected to the ADC_GND terminal, the other end of the sampling resistor R12 is connected to the GND terminal, the ADC_GND terminal is connected to one end of the filter resistor R11, the other end of the filter resistor R11 is connected to one end of the filter capacitor C1 and is also connected to the feedback terminal of the MCU (ADC detection pin of the MCU), and the other end of the filter capacitor C1 is connected to the GND terminal.

[0024] A wireless atomization device comprises the aforementioned atomization circuit based on wireless power transmission.

[0025] By means of the above solution, the present invention has at least the following advantages:

[0026] 1. In the present invention, there is no physical electrical connection between the solution storage chamber of the atomizer and the atomizer main body driving circuit during use, which makes it convenient for users to add solution.

[0027] 2. The utility model is detachable, and users can disassemble the solution chamber by themselves, which is convenient for cleaning and maintenance.

[0028] 3. The utility model is easy to use. The user puts the solution container into the atomizer main body driving circuit to start atomization.

[0029] 4. The atomization effect of the utility model is good. The atomization circuit can atomize most solutions, and the atomized particles are small.

[0030] 5. The noise in this utility model is relatively small, and the atomization circuit will not introduce too many noise sources.

[0031] 6. The present invention is safer because the solution chamber and the atomizer main body driving circuit are independent of each other, so the possibility of the solution contacting the electronic circuit and causing the atomizer to malfunction is lower.

[0032] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 This is a principle block diagram of the utility model;

[0035] Figure 2 It is the actual circuit diagram of the utility model;

[0036] Figure 3 This is the actual circuit diagram of the drive unit of the utility model;

[0037] Figure 4 It is the actual circuit diagram of the primary energy supply unit of the present utility model;

[0038] Figure 5 This is the actual circuit diagram of the secondary atomization unit of the present utility model;

[0039] Figure 6 It is an actual circuit diagram of the detection unit of the present utility model. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0042] Example

[0043] like Figures 1 to 6As shown, an atomization circuit based on wireless power transmission includes a driving unit 1 for providing a PWM driving wave, and the frequency and duty cycle of the PWM wave can be adjusted. The output end of the driving unit 1 is connected to the input end of the main energy supply unit 2;

[0044] The primary energy supply unit 2 is used to convert the electrical energy of the PWM wave into electromagnetic energy. The output end of the primary energy supply unit 2 and the input end of the secondary atomization unit 3 transmit electrical energy through the electromagnetic field and are wirelessly connected in this way;

[0045] The secondary atomization unit 3 is used to convert electromagnetic energy into electrical energy and drive the atomization device to perform atomization. The output end of the secondary atomization unit 3 is connected to the input end of the atomization device.

[0046] The detection unit 4 is used to detect the driving current. The input end of the detection unit 4 is connected to the output end of the main-stage energy supply unit 2, and the feedback end of the detection unit 4 is connected to the input end of the driving unit 1.

[0047] Preferably, in the atomization circuit based on wireless power transmission, the driving unit includes an MCU and a first driving circuit module and a second driving circuit module. One PWM output pin of the MCU is connected to the input end of the first driving circuit module, and the output end of the first driving circuit module is connected to the input end PWM_OUT1 of the main energy supply unit. Another PWM output pin of the MCU is connected to the input end of the second driving circuit module, and the output end of the second driving circuit module is connected to the input end PWM_OUT2 of the main energy supply unit. The input PWM waveforms of the first driving circuit module and the second driving circuit module are complementary.

[0048] Preferably, in the atomization circuit based on wireless power transmission, the MCU model is STM32F030, or GD32E230, or any other MCU with PWM wave output function.

[0049] The first drive circuit module of the present invention includes a gate drive chip IC1 (referred to as gate IC1), the third pin of the gate drive chip IC1 is connected to the eighteenth pin of the MCU through a resistor R1, the seventh pin of the gate drive chip IC1 is connected to the gate of the MOS transistor Q1 through a resistor R3, the gate of the MOS transistor Q1 is connected to the source of the MOS transistor Q1 through a resistor R4, the drain of the MOS transistor Q1 is connected to the VDS terminal, the source of the MOS transistor Q1 is connected to the drain of the MOS transistor Q2, and at the same time, the source of the MOS transistor Q1 is connected to the sixth pin of the gate drive chip IC1 The source of MOS transistor Q1 is connected to the primary power supply unit 2. The fifth pin of the gate driver chip IC1 is connected to the gate of MOS transistor Q2 via resistor R5. The gate of MOS transistor Q2 is connected to the source of MOS transistor Q2 via resistor R6 and to the ADC_GND terminal. VDS is provided by VDD via a diode. The DC voltage range of VDD is 5 to 56V. The gate driver chip generates two PWM gate control signals from the low-voltage PWM wave output by the MCU, which control the alternating conduction of the upper and lower MOS transistors, thereby generating a high-voltage PWM signal. The gate driver chip IC1 can be any of the IR2104, IR2101, LM5107, or EG2121, or other gate driver chips that implement the same gate drive function. A diode can be connected in parallel with resistors R3 and R5 to reduce level conversion time.

[0050] The second drive circuit module of the utility model includes a gate drive chip IC2, the third pin of the gate drive chip IC2 is connected to the fourteenth pin of the MCU through a resistor R2, the seventh pin of the gate drive chip IC2 is connected to the gate of the MOS tube Q3 through a resistor R7, the gate of the MOS tube Q3 is connected to the source of the MOS tube Q3 through a resistor R8, the drain of the MOS tube Q3 is connected to the VDS terminal, the source of the MOS tube Q3 is connected to the drain of the MOS tube Q4, and at the same time, the source of the MOS tube Q3 is connected to the sixth pin of the gate drive chip IC2. The pins are connected and the source of the MOS tube Q3 is connected to the main-stage energy supply unit (2), the fifth pin of the gate driver chip IC2 is connected to the gate of the MOS tube Q4 through the resistor R9, the gate of the MOS tube Q4 is connected to the source of the MOS tube Q4 through the resistor R10 and is connected to the ADC_GND terminal, wherein VDS is provided by VDD through a diode, the DC voltage range of the VDD terminal is 5 to 56V, and the model of the gate driver chip IC2 is any one of IR2104, IR2101, LM5107 and EG2121.

[0051] The gate driver chip IC1 and the gate driver chip IC2 mentioned above both use any one of the chip models IR2104, IR2101, LM5107 or EG2121, which can be selected according to the actual needs of the actual operator. The gate driver chip can output two logically opposite levels (with built-in dead zone) through the HO pin and the LO pin according to the different input high and low levels of the HIN pin and the LIN pin to realize the on and off control of the two MOSs, and the two MOSs cannot be turned on at the same time.

[0052] The DC voltage range of the VDD terminals in the first driving circuit module and the second driving circuit module is 5-56V, and the present invention adopts DC12V.

[0053] The specific work of the drive unit,

[0054] The two PWM output pins of the MCU output PWM waves with a specific frequency and duty cycle (frequency: 50khz~200khz, duty cycle: 20%~80%), and the waveforms of the two PWMs are complementary. The two PWM paths are input to the gate IC1 and the gate IC2 through the resistor R1 and the resistor R2 respectively. After the gate IC1 receives the PWM waveform, the HO pin and the LO pin output corresponding voltages through the resistors R3 and R5 to control the conduction states of the MOS tubes Q1 and Q2. When the MOS tube Q1 is turned on, the MOS tube Q2 is turned off and on, and when the MOS tube Q2 is turned on, the MOS tube Q1 is turned off and on. Similarly, after the gate IC2 receives the PWM waveform, the HO pin and the LO pin output corresponding voltages through the resistors R7 and R9 to control the conduction states of the MOS tubes Q3 and Q4. When the MOS tube Q3 is turned on, the MOS tube Q4 is turned off and on, and when the MOS tube Q4 is turned on, the MOS tube Q3 is turned off and on. Furthermore, because the PWM waveforms input to the gate IC1 and the gate IC2 are complementary, when the MOS tube Q1 at the gate IC1 end is turned on and the MOS tube Q2 is turned off and on, the gate IC2 At C2, Q4 is turned on and MOS transistor Q3 is turned off. At this time, PWM_OUT1 is connected to VDS (the loss of the MOS transistor is negligible), PWM_OUT2 is connected to ADC_GND (the loss of the MOS transistor is negligible), and the voltage difference between PWM_OUT1 and PWM_OUT2 is approximately +VDS. When MOS transistor Q2 is turned on and MOS transistor Q1 is turned off at gate IC1, Q3 is turned on and MOS transistor Q2 is turned off at gate IC2. At this time, PWM_OUT2 is connected to VDS and PWM_OUT1 is connected to ADC_GND (the loss of the MOS transistor is negligible), and the voltage difference between PWM_OUT1 and PWM_OUT2 is approximately -VDS. When the drive unit is operating normally, PWM_OUT1 and PWM_OUT2 can generate a PWM wave with a VPP of 2 times VDS and a frequency equal to the MCU output PWM frequency.

[0055] In the present invention, one or more diodes can be connected in parallel to resistors R3, R5, R7, and R9 to reduce the gate IC's low-level recovery time. The dead time of the MOS transistor can be controlled by the gate IC or the MCU output.

[0056] Optionally, the specific type of the above-mentioned MOS can also be NMOS, PMOS, PNP transistor, NPN transistor, and the corresponding gate driver chip IC1 and gate driver chip IC2, as well as other suitable connection methods, need to be selected according to actual use. The present utility model adopts NMOS.

[0057] The primary energy supply unit 2 in the present invention is an induction coil. Preferably, the induction coil contains ferromagnetic materials such as ferrite or silicon steel sheets. The atomizer equipped with the secondary atomization unit 3 can be plugged in or tightly installed on the primary energy supply unit 2.

[0058] The induction coil of the primary power supply unit 2 can be an I-shaped inductor, a T-shaped inductor, an air-core coil, or any other inductor shape, or a combination of a coil and a magnetic core. The two ends of the induction coil L1 are directly connected to the PWM_OUT1 and PWM_OUT2 of the drive unit. The PWM generated by PWM_OUT1 and PWM_OUT2 directly acts on the induction coil L1, generating a changing electromagnetic field through the induction coil L1, thereby converting electrical energy into electromagnetic energy.

[0059] The secondary atomization unit 3 in the present invention includes an induction coil 31 and an atomization sheet 32 . The induction coil 31 is inductively connected to the primary energy supply unit 2 , and the primary energy supply unit 2 generates an induced voltage in the induction coil 31 . The output end of the induction coil 31 is connected to the atomization sheet 32 .

[0060] The working principle of the secondary atomization unit is that when the induction coil L2 is close to the changing electromagnetic field generated by the induction coil L1, a changing induced voltage or induced current will be generated at both ends of the induction coil L2, without the need for complex transformations such as rectification and inversion. The induced voltage VPP is determined by the inductance value (or turns ratio) of the induction coil L2 and the induction coil L1; the changing induced voltage acts on the atomizer plate, and due to the inverse piezoelectric effect, the atomizer plate will produce repeated vibrations, atomizing the solution.

[0061] In the secondary atomization unit, a capacitor, an inductor, a resistor or a circuit of any combination of the three can be connected in series to perform simple filtering, isolation and current limiting on the input PWM of the atomization plate.

[0062] The detection unit 4 in the present invention includes a sampling resistor R12, a filter capacitor C1 and a filter resistor R11. One end of the sampling resistor R12 is connected to the ADC_GND end, the other end of the sampling resistor R12 is connected to the GND end, the ADC_GND end is connected to one end of the filter resistor R11, the other end of the filter resistor R11 is connected to one end of the filter capacitor C1 and is also connected to the feedback end of the MCU (ADC detection pin of the MCU), and the other end of the filter capacitor C1 is connected to the GND end.

[0063] The detection principle is that the current of the drive unit generates a sampling voltage through the sampling resistor R12. The sampling voltage is filtered by the filter resistor R11 and the filter capacitor C1 before being sampled by the MCU. Based on the magnitude of the sampling current, the MCU can determine whether the PWM frequency output by the MCU is the optimal frequency and perform the corresponding search and modification of the optimal frequency. At the same time, based on the magnitude of the sampling current, it can also determine whether the secondary atomization module is close to the primary power supply module and generate an induced voltage.

[0064] A wireless atomization device adopts the atomization circuit based on wireless power transmission.

[0065] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0066] In the description of this application, it should be noted that the terms "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0067] In addition, the terms "horizontal" and "vertical" do not mean that the components must be absolutely horizontal or vertical, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0068] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An atomization circuit based on wireless power transmission, characterized in that: It comprises a driving unit (1) for providing a PWM driving wave and capable of adjusting the frequency and duty cycle of the PWM wave, wherein the output end of the driving unit (1) is connected to the input end of the main-stage energy supply unit (2); A primary energy supply unit (2) is used to convert the electrical energy of the PWM drive wave into electromagnetic energy, and the output end of the primary energy supply unit (2) and the input end of the secondary atomization unit (3) transmit electrical energy through the electromagnetic field; A secondary atomization unit (3) is used to convert electromagnetic energy into electrical energy and drive the atomization device to perform atomization, wherein the output end of the secondary atomization unit (3) is connected to the input end of the atomization device; The detection unit (4) is used to detect the driving current, wherein the input end of the detection unit (4) is connected to the output end of the primary energy supply unit (2), and the feedback end of the detection unit (4) is connected to the input end of the driving unit (1).

2. The atomization circuit based on wireless power transmission according to claim 1, characterized in that: The driving unit (1) comprises an MCU and a first driving circuit module and a second driving circuit module with complementary input PWM waveforms; one PWM output pin of the MCU is connected to the input end of the first driving circuit module; the output end of the first driving circuit module is connected to the input end PWM_OUT1 of the main-stage energy supply unit (2); another PWM output pin of the MCU is connected to the input end of the second driving circuit module; the output end of the second driving circuit module is connected to the input end PWM_OUT2 of the main-stage energy supply unit (2); wherein the model of the MCU is STM32F030 or GD32E230.

3. The atomization circuit based on wireless power transmission according to claim 2, characterized in that: The first driving circuit module includes a gate driving chip IC1, the second pin and the third pin of the gate driving chip IC1 are connected to the eighteenth pin of the MCU through a resistor R1, the seventh pin of the gate driving chip IC1 is connected to the gate of the MOS transistor Q1 through a resistor R3, the gate of the MOS transistor Q1 is connected to the source of the MOS transistor Q1 through a resistor R4, the drain of the MOS transistor Q1 is connected to the VDS terminal, the source of the MOS transistor Q1 is connected to the drain of the MOS transistor Q2, and at the same time, the source of the MOS transistor Q1 is connected to the sixth pin of the gate driving chip IC1 and the source of the MOS transistor Q1 is connected to the main The first power supply unit (2) is connected to the PWM_OUT1 of the first power supply unit (2), the fifth pin of the gate driver chip IC1 is connected to the gate of the MOS tube Q2 through the resistor R5, the gate of the MOS tube Q2 is connected to the source of the MOS tube Q2 through the resistor R6 and is connected to the ADC_GND terminal, wherein VDS is provided by VDD through a diode, the DC voltage range of the VDD terminal is 5 to 56V, the model of the gate driver chip IC1 is any one of IR2104, IR2101, LM5107 or EG2121, wherein a diode can be connected in parallel to the resistor R3 and the resistor R5 respectively.

4. The atomization circuit based on wireless power transmission according to claim 2, characterized in that: The second driving circuit module includes a gate driving chip IC2, the second pin and the third pin of the gate driving chip IC2 are connected to the fourteenth pin of the MCU through a resistor R2, the seventh pin of the gate driving chip IC2 is connected to the gate of the MOS transistor Q3 through a resistor R7, the gate of the MOS transistor Q3 is connected to the source of the MOS transistor Q3 through a resistor R8, the drain of the MOS transistor Q3 is connected to the VDS terminal, the source of the MOS transistor Q3 is connected to the drain of the MOS transistor Q4, and at the same time, the source of the MOS transistor Q3 is connected to the sixth pin of the gate driving chip IC2 and the source of the MOS transistor Q3 is connected to the VDS terminal. The PWM_OUT2 of the main power supply unit (2) is connected, the fifth pin of the gate driver chip IC2 is connected to the gate of the MOS tube Q4 through the resistor R9, the gate of the MOS tube Q4 is connected to the source of the MOS tube Q4 through the resistor R10 and is connected to the ADC_GND terminal, wherein VDS is provided by VDD through a diode, the DC voltage range of the VDD terminal is 5 to 56V, the model of the gate driver chip IC2 is any one of IR2104, IR2101, LM5107 or EG2121, and a diode can be connected in parallel to the resistor R7 and the resistor R9 respectively.

5. The atomization circuit based on wireless power transmission according to claim 1, characterized in that: The primary energy supply unit (2) is an induction coil, and the atomizer equipped with the secondary atomization unit (3) is installed on the primary energy supply unit (2) in a plug-in or close-fitting manner, and the two ends of the induction coil are respectively connected to the PWM_OUT1 output by the first drive unit and the PWM_OUT2 output by the second drive unit, wherein the induction coil includes an I-shaped inductor and a T-shaped inductor.

6. The atomization circuit based on wireless power transmission according to claim 1, characterized in that: The secondary atomization unit (3) includes an induction coil (31) and an atomization sheet (32), wherein the induction coil (31) and the atomization sheet (32) are connected to each other, and the induction coil (31) is connected to the primary energy supply unit (2) through electromagnetic field induction, wherein a capacitor, inductor or resistor can be connected in series between the induction coil (31) and the atomization sheet (32).

7. The atomization circuit based on wireless power transmission according to claim 1, characterized in that: The detection unit (4) comprises a sampling resistor R12, a filter capacitor C1 and a filter resistor R11, one end of the sampling resistor R12 is connected to the ADC_GND end, the other end of the sampling resistor R12 is connected to the GND end, the ADC_GND end is connected to one end of the filter resistor R11, the other end of the filter resistor R11 is connected to one end of the filter capacitor C1 and is also connected to the ADC pin of the MCU, and the other end of the filter capacitor C1 is connected to the GND end.

8. The atomization circuit based on wireless power transmission according to claim 1, characterized in that: The frequency of the PWM wave is between 50kHz and 200kHz.

9. The atomization circuit based on wireless power transmission according to claim 3 or 4, characterized in that: The MOS tube is an NMOS or an NPN transistor.

10. A wireless atomization device, characterized by: The device comprises an atomization circuit based on wireless power transmission according to any one of claims 1 to 9.

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