Control circuit of atomization sheet

Abstract

According to the control circuit of the atomization piece, the voltage-controlled oscillator, the phase discriminator and the filter are added, when the impedance angle of the atomization piece changes, the phase difference between the output frequency of the voltage-controlled oscillator and the oscillation frequency of the atomization piece can be changed, and therefore the phase difference is detected by the phase discriminator; therefore, the instantaneous voltage output by the phase discriminator can be changed, the voltage obtained after the instantaneous voltage is filtered by the filter can be changed, the output frequency of the voltage-controlled oscillator can be changed, the oscillation frequency of the atomization piece can be changed, and compared with an existing scheme, the atomization piece can work at the optimal frequency as much as possible; the problem that in an existing scheme, the atomization piece is controlled only through a voltage / current control method, the difference between the working state of the atomization piece and the actual working condition is large, and therefore the humidification efficiency of the atomization piece is poor is solved.

Description

Technical Field

[0001] The present application relates to the technical field of humidifiers, and in particular to a control circuit for an atomizing sheet. Background Art

[0002] At present, the atomizer drive circuits of humidifiers mainly include self-excited oscillation type and self-excited oscillation type. Self-excited oscillation type: The self-excited oscillation circuit generates an oscillation signal through its own feedback loop. In the atomizer drive circuit, the self-excited oscillation type usually uses an LC oscillation circuit composed of an inductor and a capacitor to generate a high-frequency oscillation signal to drive the atomizer to work. This circuit structure is simple and low cost, but there may be problems with stability and narrow frequency adjustment range. Self-excited oscillation type: The self-excited oscillation circuit drives the generation of the oscillation signal through an external excitation signal. In the atomizer drive circuit, the self-excited oscillation type usually uses an external signal source (such as a rectangular wave signal source) to provide an excitation signal, thereby generating a high-frequency oscillation signal to drive the atomizer to work. This circuit structure can achieve a larger frequency adjustment range and stability, but requires an external signal source and is relatively expensive.

[0003] Among them, the excitation oscillation type is widely used due to its high efficiency and low heat generation. However, the excitation oscillation type currently generally adopts the voltage / current control method. Since the voltage / current information cannot correctly reflect the working state of the atomizer, the driving frequency of the atomizer is not set at the optimal working point, the steady-state error is large, and then the power is reduced and the efficiency is reduced. In addition, most of the voltage / current control is digital circuit control, which has a slow dynamic response speed and large frequency fluctuations.

[0004] The existing solution only relies on the voltage / current control method to control the atomizer sheet, which makes the working state of the atomizer sheet differ greatly from the actual working condition, thereby making the humidification efficiency of the atomizer sheet poor, that is, there is a lack of a method to improve the humidification efficiency of the atomizer sheet. Summary of the invention

[0005] The main purpose of the present application is to provide a control circuit for an atomizer sheet, so as to at least solve the problem that the existing solution only relies on the voltage / current control method to control the atomizer sheet, so that the working state of the atomizer sheet is greatly different from the actual working condition, thereby resulting in poor humidification efficiency of the atomizer sheet.

[0006] In order to achieve the above object, according to one aspect of the present application, a control circuit of an atomizer sheet is provided, and the control circuit of the atomizer sheet includes:

[0007] A voltage-controlled oscillator, wherein the output end of the voltage-controlled oscillator is used to be electrically connected to the atomizing sheet;

[0008] A phase detector, wherein a first input end of the phase detector is electrically connected to an output end of the voltage-controlled oscillator, and a second input end of the phase detector is electrically connected to the atomizing sheet;

[0009] A filter, wherein the input end of the filter is electrically connected to the output end of the phase detector, and the output end of the filter is electrically connected to the input end of the voltage-controlled oscillator.

[0010] Optionally, the control circuit of the atomizer sheet further includes:

[0011] a switch device, wherein a first terminal of the switch device is electrically connected to an output terminal of the voltage-controlled oscillator, a second terminal of the switch device is electrically connected to a voltage source, and a third terminal of the switch device is grounded;

[0012] A matching network is used to be electrically connected between the second end of the switch device and the atomizer sheet, and the matching network is used to match impedance.

[0013] Optionally, the control circuit of the atomizer sheet further includes: a first inductance module and a first capacitor module, the first inductance module is electrically connected between the voltage source and the second end of the switching device, and the first capacitor module is electrically connected between the second end of the switching device and the matching network.

[0014] Optionally, the matching network includes: a second capacitor module and a second inductor module, the first end of the second capacitor module is used to be electrically connected to the second end of the switching device, the second end of the second capacitor module is electrically connected to the first end of the second inductor module and the atomizer sheet respectively, and the second end of the second inductor module is grounded.

[0015] Optionally, the matching network includes: a third capacitor module and a third inductor module, the first end of the third capacitor module is electrically connected to the first end of the third inductor module and the second end of the switching device respectively, the second end of the third capacitor module is used to be electrically connected to the atomizer sheet, and the second end of the third inductor module is grounded.

[0016] Optionally, the matching network includes: a fourth capacitor module and a fourth inductor module, the first end of the fourth inductor module is used to be electrically connected to the second end of the switching device, the second end of the fourth inductor module is electrically connected to the first end of the fourth capacitor module and the atomizer sheet respectively, and the second end of the fourth capacitor module is grounded.

[0017] Optionally, the matching network includes: a fifth capacitor module and a fifth inductor module, the first end of the fifth capacitor module is electrically connected to the first end of the fifth inductor module and the second end of the switching device respectively, the second end of the fifth inductor module is used to be electrically connected to the atomizer sheet, and the second end of the fifth capacitor module is grounded.

[0018] Optionally, the matching network includes: a sixth capacitor module and a seventh capacitor module, the first end of the sixth capacitor module is used to be electrically connected to the second end of the switching device, the second end of the sixth capacitor module is respectively electrically connected to the first end of the seventh capacitor module and the atomization sheet, and the second end of the seventh capacitor module is grounded.

[0019] Optionally, the matching network includes: a sixth inductor module and a seventh inductor module, the first end of the sixth inductor module is used to be electrically connected to the second end of the switching device, the second end of the sixth inductor module is respectively electrically connected to the first end of the seventh inductor module and the atomizer sheet, and the second end of the seventh inductor module is grounded.

[0020] Optionally, the control circuit of the atomizer sheet further includes: a controller, which is electrically connected to an enable end of the voltage-controlled oscillator, wherein the controller is used to turn off the voltage-controlled oscillator after a first preset time period and turn on the voltage-controlled oscillator after a second preset time period.

[0021] By applying the technical solution of the present application, since the atomizer sheet is a circuit network mainly composed of reactance elements, the impedance angle of the atomizer sheet will change with the change of the output frequency of the voltage-controlled oscillator, and the impedance angle determines the phase difference between the output frequency of the voltage-controlled oscillator and the oscillation frequency of the atomizer sheet. Therefore, by adding a voltage-controlled oscillator, a phase detector and a filter, when the impedance angle of the atomizer sheet changes, the phase difference between the output frequency of the voltage-controlled oscillator and the oscillation frequency of the atomizer sheet will change, so that the phase difference is detected by the phase detector, thereby changing the instantaneous voltage output by the phase detector, thereby changing the voltage obtained by the filter after filtering the instantaneous voltage, thereby changing the output frequency of the voltage-controlled oscillator, thereby changing the oscillation frequency of the atomizer sheet. Compared with the existing solution, the atomizer sheet can be made to work at the optimal frequency as much as possible, which solves the problem that the existing solution only relies on the voltage / current control method to control the atomizer sheet, so that the working state of the atomizer sheet is greatly different from the actual working condition, thereby making the humidification efficiency of the atomizer sheet poor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 A schematic diagram of a control circuit of an atomizer sheet provided in an embodiment of the present application is shown;

[0024] Figure 2A schematic diagram of a control circuit of another atomizer sheet provided according to an embodiment of the present application is shown;

[0025] Figure 3 A schematic diagram of a first matching network provided in an embodiment of the present application is shown;

[0026] Figure 4 A schematic diagram of a second matching network provided in an embodiment of the present application is shown;

[0027] Figure 5 A schematic diagram of a third matching network provided in an embodiment of the present application is shown;

[0028] Figure 6 A schematic diagram of a fourth matching network provided in an embodiment of the present application is shown;

[0029] Figure 7 A schematic diagram of a fifth matching network provided in an embodiment of the present application is shown;

[0030] Figure 8 A schematic diagram of a sixth matching network provided in an embodiment of the present application is shown;

[0031] Fig. 9 A schematic diagram of a seventh matching network provided in an embodiment of the present application is shown;

[0032] Fig.10 A schematic diagram of an eighth matching network provided in an embodiment of the present application is shown;

[0033] Fig.11 A schematic diagram of a ninth matching network provided in an embodiment of the present application is shown;

[0034] Fig.12 A schematic diagram of a tenth matching network provided in an embodiment of the present application is shown.

[0035] The above drawings include the following reference numerals:

[0036] 100. Matching network. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] 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 drawings in 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. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] As introduced in the background technology, the current atomizer drive circuits of humidifiers mainly include self-excited oscillation type and self-excited oscillation type. Self-excited oscillation type: The self-excited oscillation circuit generates an oscillation signal through its own feedback loop. In the atomizer drive circuit, the self-excited oscillation type usually uses an LC oscillation circuit composed of an inductor and a capacitor to generate a high-frequency oscillation signal, thereby driving the atomizer to work. This circuit structure is simple and low in cost, but there may be problems with stability and narrow frequency adjustment range. Self-excited oscillation type: The self-excited oscillation circuit drives the generation of the oscillation signal through an external excitation signal. In the atomizer drive circuit, the self-excited oscillation type usually uses an external signal source (such as a rectangular wave signal source) to provide an excitation signal, thereby generating a high-frequency oscillation signal to drive the atomizer to work. This circuit structure can achieve a larger frequency adjustment range and stability, but requires an external signal source and is relatively expensive. Among them, the self-excited oscillation type is widely used due to its high efficiency and low heat generation. However, at present, the voltage / current control method is generally used in the oscillation-excited type. Since the voltage / current information cannot correctly reflect the working state of the atomizer plate, the driving frequency of the atomizer plate is not set at the optimal working point, and the steady-state error is large, which leads to power reduction and efficiency reduction. In addition, most of the voltage / current control is digital circuit control, and this method has slow dynamic response speed and large frequency fluctuation. In order to solve the problem that the existing solution only relies on the voltage / current control method to control the atomizer plate, resulting in a large difference between the working state of the atomizer plate and the actual working condition, thereby resulting in poor humidification efficiency of the atomizer plate, an embodiment of the present application provides a control circuit for an atomizer plate.

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0042] In this embodiment, a control circuit of an atomizer is provided, such as Figure 1 As shown, the control circuit of the atomizer sheet includes:

[0043] A voltage-controlled oscillator A1, the output end of which is used to be electrically connected to the atomizer sheet Y1;

[0044] A phase detector A2, wherein a first input end of the phase detector A2 is electrically connected to an output end of the voltage-controlled oscillator A1, and a second input end of the phase detector A2 is electrically connected to the atomizing sheet Y1;

[0045] Filter A3, the input end of the filter A3 is electrically connected to the output end of the phase detector A2, and the output end of the filter A3 is electrically connected to the input end of the voltage-controlled oscillator A1.

[0046] The function of the filter is to filter out irrelevant interference signals in the instantaneous voltage output by the phase detector and improve the stability of the loop.

[0047] In the control circuit of the above-mentioned atomizer sheet, since the atomizer sheet is a circuit network mainly composed of inductive elements, the impedance angle of the atomizer sheet will change with the change of the output frequency of the voltage-controlled oscillator, and the impedance angle determines the phase difference between the output frequency of the voltage-controlled oscillator and the oscillation frequency of the atomizer sheet. Therefore, by adding a voltage-controlled oscillator, a phase detector and a filter, when the impedance angle of the atomizer sheet changes, the phase difference between the output frequency of the voltage-controlled oscillator and the oscillation frequency of the atomizer sheet will change, so that the phase difference is detected by the phase detector, thereby changing the instantaneous voltage output by the phase detector, thereby changing the voltage obtained by the filter after filtering the instantaneous voltage, thereby changing the output frequency of the voltage-controlled oscillator, thereby changing the oscillation frequency of the atomizer sheet. Compared with the existing scheme, the atomizer sheet can be made to work at the optimal frequency as much as possible, which solves the problem that the existing scheme only relies on the voltage / current control method to control the atomizer sheet, so that the working state of the atomizer sheet is greatly different from the actual working condition, thereby making the humidification efficiency of the atomizer sheet poor.

[0048] In addition, compared with existing solutions, the present invention has smaller steady-state error, faster dynamic response speed and higher frequency stability.

[0049] Process: Under ideal working conditions, the output frequency of the voltage-controlled oscillator and the oscillation frequency of the atomizer should be the same, and the phase difference is a constant value. If the atomizer does not work at the optimal frequency, its impedance angle will change, so that the phase difference with the driving frequency will change, which will be detected by the phase detector, thereby changing the instantaneous voltage output by the phase detector, thereby changing the filter voltage (that is, the voltage obtained after the filter filters the instantaneous voltage), thereby changing the output frequency of the voltage-controlled oscillator (to achieve automatic frequency tracking), thereby changing the oscillation frequency of the atomizer.

[0050] If the frequency is still not the optimal frequency, this process will be executed again, thus achieving the matching of the optimal working frequency of the atomizer.

[0051] In one embodiment of the present application, Figure 2 As shown, the control circuit of the above-mentioned atomizer sheet also includes:

[0052] A power amplifier circuit composed of a switch device Q1, a first inductor module L1, and a first capacitor module C1, wherein the first end of the switch device Q1 is electrically connected to the output end of the voltage-controlled oscillator A1; the second end of the switch device Q1 is electrically connected to the first end of the first inductor module L1; the third end of the switch device Q1 is grounded; the second end of the first inductor module L1 is electrically connected to a voltage source VCC; the first end of the first capacitor module C1 is electrically connected to the second end of the switch device Q1; and the second end of the first capacitor module C1 is electrically connected to the first end of the matching network.

[0053] Specifically, the first inductor module L1 is a choke coil, and its function is to isolate the AC component and suppress the oscillation voltage from interfering with the power supply. The first capacitor module C1 is an isolation capacitor module, and its function is to isolate the DC component so that the atomizer obtains an unbiased AC voltage.

[0054] The matching network 100 is used to be electrically connected between the second end of the first capacitor module C1 and the atomizer sheet Y1. The matching network 100 is used to adjust the output impedance of the power amplifier circuit so that the output impedance of the power amplifier circuit matches the load impedance of the atomizer sheet.

[0055] Specifically, when the voltage-controlled oscillator outputs a voltage, the switch device is turned on to drive the atomizer. The switch device may be a power switch device, such as a transistor. The matching network is used to adjust the output impedance of the switch device so that the output impedance of the switch device matches the load impedance of the atomizer, so that the atomizer can obtain the maximum output power at the operating frequency.

[0056] There are ten structures of matching networks:

[0057] The first structure: Figure 3 As shown, the matching network 100 includes: a second capacitor module C2 and a second inductor module L2, the first end of the second capacitor module C2 is used to be electrically connected to the second end of the first capacitor module C1, the second end of the second capacitor module C2 is electrically connected to the first end of the second inductor module L2 and the atomizer sheet Y1 respectively, and the second end of the second inductor module L2 is grounded.

[0058] The second structure: Figure 4 As shown, the matching network 100 includes: a third capacitor module C3 and a third inductor module L3, the first end of the third capacitor module C3 is electrically connected to the first end of the third inductor module L3 and the second end of the first capacitor module C1 respectively, the second end of the third capacitor module C3 is used to be electrically connected to the atomizer sheet Y1, and the second end of the third inductor module L3 is grounded.

[0059] The third structure: Figure 5 As shown, the matching network 100 includes: a fourth capacitor module C4 and a fourth inductor module L4, the first end of the fourth inductor module L4 is used to be electrically connected to the second end of the first capacitor module C1, the second end of the fourth inductor module L4 is electrically connected to the first end of the fourth capacitor module C4 and the atomizer sheet Y1 respectively, and the second end of the fourth capacitor module C4 is grounded.

[0060] The fourth structure: Figure 6 As shown, the matching network 100 includes: a fifth capacitor module C5 and a fifth inductor module L5, the first end of the fifth capacitor module C5 is electrically connected to the first end of the fifth inductor module L5 and the second end of the first capacitor module C1 respectively, the second end of the fifth inductor module L5 is used to be electrically connected to the atomizer sheet Y1, and the second end of the fifth capacitor module C5 is grounded.

[0061] The fifth structure: Figure 7 As shown, the matching network 100 includes: a sixth capacitor module C6 and a seventh capacitor module C7, the first end of the sixth capacitor module C6 is used to be electrically connected to the second end of the first capacitor module C1, the second end of the sixth capacitor module C6 is respectively electrically connected to the first end of the seventh capacitor module C7 and the atomizer sheet Y1, and the second end of the seventh capacitor module C7 is grounded.

[0062] The sixth structure: Figure 8As shown, the matching network 100 includes: a sixth inductor module L6 and a seventh inductor module L7, the first end of the sixth inductor module L6 is used to be electrically connected to the second end of the first capacitor module C1, the second end of the sixth inductor module L6 is electrically connected to the first end of the seventh inductor module L7 and the atomizer sheet Y1 respectively, and the second end of the seventh inductor module L7 is grounded.

[0063] The seventh structure: Fig. 9 As shown, the matching network 100 includes: an eighth capacitor module C8 and a ninth capacitor module C9, the first end of the eighth capacitor module C8 is electrically connected to the second end of the first capacitor module C1 and the first end of the ninth capacitor module C9 respectively, the second end of the eighth capacitor module C8 is grounded, and the second end of the ninth capacitor module C9 is electrically connected to the atomizer Y1.

[0064] The eighth structure: Fig.10 As shown, the matching network 100 includes: an eighth inductor module L8 and a ninth inductor module L9, the first end of the eighth inductor module L8 is electrically connected to the second end of the first capacitor module C1 and the first end of the ninth inductor module L9 respectively, the second end of the eighth inductor module L8 is grounded, and the second end of the ninth inductor module L9 is electrically connected to the atomizer Y1.

[0065] The ninth structure: Fig.11 As shown, the matching network 100 includes: a first impedance module Z1, a second impedance module Z2 and a third impedance module Z3, the first end of the second impedance module Z2 is electrically connected to the second end of the first capacitor module C1, the first end of the first impedance module Z1 is electrically connected to the second end of the second impedance module Z2 and the first end of the third impedance module Z3 respectively, the second end of the first impedance module Z1 is electrically connected to the atomizer Y1, and the second end of the second impedance module Z2 is grounded.

[0066] The tenth structure: Fig.12 As shown, the matching network 100 includes: a fourth impedance module Z4, a fifth impedance module Z5 and a sixth impedance module Z6, the first end of the fourth impedance module Z4 is electrically connected to the first end of the fifth impedance module Z5 and the second end of the first capacitor module C1, the first end of the sixth impedance module Z6 is electrically connected to the second end of the fourth impedance module Z4 and the atomizer Y1, and the second end of the fifth impedance module Z5 and the second end of the sixth impedance module Z6 are grounded respectively.

[0067] Each impedance module may include multiple impedances connected in parallel or in series.

[0068] The first structure, the second structure, the third structure and the fourth structure have better effects than the other structures.

[0069] Each inductor module may be composed of a plurality of inductors connected in parallel or in series, and each capacitor module may be composed of a plurality of capacitors connected in parallel or in series.

[0070] In one embodiment of the present application, Figure 2 As shown, the control circuit of the atomizer sheet further includes: a controller U1, which is electrically connected to the enable end of the voltage-controlled oscillator, wherein the controller is used to turn off the voltage-controlled oscillator after a first preset time period, and turn on the voltage-controlled oscillator after a second preset time period.

[0071] Specifically, the controller can be an MCU, that is, the MCU is used to turn off the above-mentioned voltage-controlled oscillator after a first preset time period (i.e., 10ms), and turn on the above-mentioned voltage-controlled oscillator after a second preset time period (i.e., 20ms), which is equivalent to turning off the voltage-controlled oscillator after 10ms, and turning on the above-mentioned voltage-controlled oscillator after another 10ms. The MCU inputs an enable signal EN to the voltage-controlled oscillator. The enable signal EN uses a PWM wave to control whether the voltage-controlled oscillator is working, and adjusts the gear by controlling the working time.

[0072] It should be noted that the above electrical connection can be a direct electrical connection or an indirect electrical connection. Direct electrical connection means that two devices are directly connected, and indirect electrical connection means that other devices such as capacitors and resistors are also connected between the connected A and B.

[0073] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0074] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0075] The control circuit of the atomizer sheet of the present application, since the atomizer sheet is a circuit network mainly composed of inductive elements, the impedance angle of the atomizer sheet will change with the change of the output frequency of the voltage-controlled oscillator, and the impedance angle determines the phase difference between the output frequency of the voltage-controlled oscillator and the oscillation frequency of the atomizer sheet. Therefore, by adding a voltage-controlled oscillator, a phase detector and a filter, when the impedance angle of the atomizer sheet changes, the phase difference between the output frequency of the voltage-controlled oscillator and the oscillation frequency of the atomizer sheet will change, so that the phase difference is detected by the phase detector, thereby changing the instantaneous voltage output by the phase detector, thereby changing the voltage obtained by the filter after filtering the above instantaneous voltage, thereby changing the output frequency of the voltage-controlled oscillator, thereby changing the oscillation frequency of the atomizer sheet. Compared with the existing scheme, the atomizer sheet can be made to work at the optimal frequency as much as possible, which solves the problem that the existing scheme only relies on the voltage / current control method to control the atomizer sheet, so that the working state of the atomizer sheet is greatly different from the actual working condition, thereby making the humidification efficiency of the atomizer sheet poor.

[0076] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control circuit for an atomizer sheet, characterized in that: include: A voltage-controlled oscillator, wherein the output end of the voltage-controlled oscillator is used to be electrically connected to the atomizing sheet; A phase detector, wherein a first input end of the phase detector is electrically connected to an output end of the voltage-controlled oscillator, and a second input end of the phase detector is electrically connected to the atomizing sheet; A filter, wherein the input end of the filter is electrically connected to the output end of the phase detector, and the output end of the filter is electrically connected to the input end of the voltage-controlled oscillator.

2. The control circuit of the atomizer sheet according to claim 1, characterized in that: The control circuit of the atomizer sheet also includes: a switch device, wherein a first terminal of the switch device is electrically connected to an output terminal of the voltage-controlled oscillator, a second terminal of the switch device is electrically connected to a voltage source, and a third terminal of the switch device is grounded; A matching network is used to be electrically connected between the second end of the switch device and the atomizer sheet, and the matching network is used to match impedance.

3. The control circuit of the atomizer sheet according to claim 2, characterized in that: The control circuit of the atomizer sheet further includes: a first inductor module and a first capacitor module, wherein the first inductor module is electrically connected between the voltage source and the second end of the switch device, and the first capacitor module is electrically connected between the second end of the switch device and the matching network.

4. The control circuit of the atomizer sheet according to claim 2, characterized in that: The matching network includes: a second capacitor module and a second inductor module, the first end of the second capacitor module is used to be electrically connected to the second end of the switch device, the second end of the second capacitor module is electrically connected to the first end of the second inductor module and the atomizer sheet respectively, and the second end of the second inductor module is grounded.

5. The control circuit of the atomizer sheet according to claim 2, characterized in that: The matching network includes: a third capacitor module and a third inductor module, the first end of the third capacitor module is electrically connected to the first end of the third inductor module and the second end of the switch device respectively, the second end of the third capacitor module is used to be electrically connected to the atomizer sheet, and the second end of the third inductor module is grounded.

6. The control circuit of the atomizer sheet according to claim 2, characterized in that: The matching network includes: a fourth capacitor module and a fourth inductor module, the first end of the fourth inductor module is used to be electrically connected to the second end of the switch device, the second end of the fourth inductor module is electrically connected to the first end of the fourth capacitor module and the atomizer sheet respectively, and the second end of the fourth capacitor module is grounded.

7. The control circuit of the atomizer sheet according to claim 2, characterized in that: The matching network includes: a fifth capacitor module and a fifth inductor module, the first end of the fifth capacitor module is electrically connected to the first end of the fifth inductor module and the second end of the switch device respectively, the second end of the fifth inductor module is used to be electrically connected to the atomizer sheet, and the second end of the fifth capacitor module is grounded.

8. The control circuit of the atomizer sheet according to claim 2, characterized in that: The matching network includes: a sixth capacitor module and a seventh capacitor module, the first end of the sixth capacitor module is used to be electrically connected to the second end of the switch device, the second end of the sixth capacitor module is electrically connected to the first end of the seventh capacitor module and the atomizer sheet respectively, and the second end of the seventh capacitor module is grounded.

9. The control circuit of the atomizer sheet according to claim 2, characterized in that: The matching network includes: a sixth inductor module and a seventh inductor module, the first end of the sixth inductor module is used to be electrically connected to the second end of the switch device, the second end of the sixth inductor module is electrically connected to the first end of the seventh inductor module and the atomizer sheet respectively, and the second end of the seventh inductor module is grounded.

10. The control circuit of the atomizer sheet according to claim 1, characterized in that: The control circuit of the atomizer sheet also includes: a controller, which is electrically connected to the enable end of the voltage-controlled oscillator, wherein the controller is used to turn off the voltage-controlled oscillator after a first preset time period and turn on the voltage-controlled oscillator after a second preset time period.

Images