WO2021093705A1 - 一种超声波雾化片工作电路、超声波电子烟 - Google Patents

一种超声波雾化片工作电路、超声波电子烟 Download PDF

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WO2021093705A1
WO2021093705A1 PCT/CN2020/127497 CN2020127497W WO2021093705A1 WO 2021093705 A1 WO2021093705 A1 WO 2021093705A1 CN 2020127497 W CN2020127497 W CN 2020127497W WO 2021093705 A1 WO2021093705 A1 WO 2021093705A1
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circuit
electrically connected
resistor
mos tube
inductor
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PCT/CN2020/127497
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English (en)
French (fr)
Inventor
刘建福
钟科军
郭小义
尹新强
易建华
李胜博
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湖南中烟工业有限责任公司
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Publication of WO2021093705A1 publication Critical patent/WO2021093705A1/zh

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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50—Control or monitoring

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  • the invention particularly relates to an ultrasonic atomizing sheet working circuit and an ultrasonic electronic cigarette.
  • the ultrasonic atomization sheet works in a half-wave oscillation mode, that is, one end of the ultrasonic atomization sheet is connected to the ground of the circuit board, and the other end is connected to the oscillation positive electrode for half-sine oscillation.
  • the ultrasonic atomization sheet It can only oscillate repeatedly from zero point to one side (positive half cycle), with small amplitude, low efficiency and small amount of smoke.
  • the purpose of the present invention is to provide an ultrasonic atomizer sheet working circuit and ultrasonic electronic cigarette, in view of the small amplitude, low efficiency, and small amount of smoke in the half-wave oscillation mode of the ultrasonic atomizer sheet in the prior art.
  • the atomization sheet is loaded with negative pressure, so that the ultrasonic atomization sheet continuously oscillates from the negative period to the positive period from the zero point to the positive period, which increases the amplitude of the ultrasonic atomization sheet, improves the oscillation efficiency, and increases the amount of smoke.
  • An ultrasonic atomizing sheet working circuit including a power supply module and a microprocessor, and its structural feature is that it also includes a high-frequency square wave generating circuit and a resonance circuit; the resonance circuit includes an inductor, and the inductance is connected to the ultrasonic atomizing sheet.
  • the first end of the inductor and the negative electrode of the ultrasonic atomizer are electrically connected to the positive output end of the power module, and the positive electrode of the ultrasonic atomizer is electrically connected to the second end of the inductor; the output end of the microprocessor is connected to the high frequency
  • the control end of the square wave generating circuit is electrically connected; the output end of the high frequency square wave generating circuit is electrically connected to the second end of the inductor.
  • VCC VCC
  • the high-frequency square wave generating circuit includes a PWM amplifying circuit and a MOS tube switching circuit; the output terminal of the microprocessor is electrically connected to the inductor through the PWM amplifying circuit and the MOS tube switching circuit in sequence.
  • the PWM wave output by the microprocessor is amplified by the PWM amplifier circuit, it is output to the MOS tube switching circuit and used to control the continuous switching of the MOS tube switching circuit to achieve continuous charging and discharging of the inductor, thereby generating a high-frequency and high-voltage half on the inductor.
  • the sinusoidal oscillating signal is then applied to the positive electrode of the ultrasonic atomizer.
  • the resonant circuit further includes a first capacitor connected in series in the series loop.
  • the capacitance value of the first capacitor is relatively small, and it is mainly used to reduce or eliminate the interference effect of the parasitic capacitance in the ultrasonic atomizing film, so that the resonance effect is better.
  • the PWM amplifier circuit includes a first resistor, a square wave amplifier, and a second capacitor
  • the MOS tube switch circuit includes a second resistor, a third resistor, and a MOS tube;
  • the input end of the wave amplifier is electrically connected, the first resistor is connected between the output end of the microprocessor and the ground, the power end of the square wave amplifier is grounded through the second capacitor, and the output end of the square wave amplifier is connected to the MOS tube through the second resistor.
  • the gate is electrically connected, the third resistor is connected between the gate of the MOS tube and the ground, the source of the MOS tube is grounded, and the drain of the MOS tube is electrically connected to the second end of the inductor.
  • the PWM wave output by the microprocessor is amplified by the PWM amplifier circuit, and then output to the MOS tube switching circuit and used to control the continuous switching of the MOS tube to achieve continuous charging and discharging of the inductor, thereby generating a high frequency on the inductor
  • the high-voltage half-sine oscillating signal is then applied to the positive pole of the ultrasonic atomizer.
  • the resonance circuit has Negative pressure oscillation.
  • it also includes a current collecting circuit for collecting the working current between the source of the MOS tube and the ground, and the output terminal of the current collecting circuit is electrically connected with the input terminal of the microprocessor.
  • the current collecting circuit is used to collect the working current and send it to the microprocessor, so that the microprocessor can adjust the frequency of the output PWM wave according to the working current, and finally realize the power adjustment of the ultrasonic atomizer.
  • the current collection circuit includes a fourth resistor, a fifth resistor, and a third capacitor.
  • the fifth resistor is connected between the source of the MOS transistor and the ground, and the source of the MOS transistor passes through the fourth resistor,
  • the third capacitor is grounded, and the input terminal of the microprocessor is connected between the fourth resistor and the third capacitor.
  • the power module includes a battery and a boost module, and the battery is electrically connected to the first end of the inductor through the boost module.
  • the boost chip in the boost module is used to boost the battery voltage to the voltage required by the resonant circuit.
  • the power module has good versatility.
  • the battery is a rechargeable battery.
  • a spike absorbing circuit which is connected between the gate of the MOS tube and the ground.
  • the microprocessor when working, the microprocessor outputs PWM waves to the high-frequency square wave generating circuit, and the PWM waves control the MOS tube in the high-frequency square wave generating circuit to switch continuously, thereby continuously charging and discharging the inductance in the resonant circuit, so that The ultrasonic atomizer in the resonant circuit oscillates to produce smoke.
  • a spike absorbing circuit is connected to the MOS tube grid, it is used to absorb the high-voltage spikes poured over the MOS tube grid, thereby protecting the square wave amplifier connected to the MOS tube grid and preventing the square wave amplifier from being burned. Bad, improve product reliability and yield.
  • the spike absorption circuit includes a PNP type triode, the emitter of the PNP type triode is electrically connected to the gate of the MOS transistor, the collector of the PNP type triode is grounded, and the base of the PNP type triode is connected to the square wave amplifier. The output terminal is electrically connected.
  • the present invention also provides an ultrasonic electronic cigarette, the structural feature of which is that it includes the ultrasonic atomizing sheet working circuit.
  • the present invention applies negative pressure to the ultrasonic atomizer sheet, so that the ultrasonic atomizer sheet continuously oscillates from the negative period to the positive period from the zero point to the positive period, which increases the amplitude of the ultrasonic atomizer sheet and improves the oscillation efficiency.
  • Increase the amount of smoke at the same time, add a spike absorption circuit on the MOS tube grid to absorb the high voltage spikes that are poured on the MOS tube grid, thereby protecting the square wave amplifier connected to the MOS tube grid and improving product reliability And yield.
  • Fig. 1 is a circuit block diagram of the first embodiment of the present invention.
  • Figure 2 is a schematic circuit diagram of the first embodiment of the present invention.
  • Fig. 3 is a circuit block diagram of the second embodiment of the present invention.
  • Fig. 4 is a schematic circuit diagram of the second embodiment of the present invention.
  • 1 is a power module
  • 101 is a battery
  • 102 is a boost module
  • 2 is a microprocessor
  • 3 is a high-frequency square wave generating circuit
  • 301 is a PWM amplifier circuit
  • 302 is a MOS tube switching circuit
  • 4 is a resonance circuit.
  • 5 is a current acquisition circuit
  • 6 is a spike absorption circuit
  • U1 is a square wave amplifier
  • L1 is an inductor
  • C1 is the first capacitor
  • C2 is the second capacitor
  • C3 is the third capacitor
  • R1 is the first resistor
  • R2 is the second Resistor
  • R3 is the third resistor
  • R4 is the fourth resistor
  • R5 is the fifth resistor
  • Q1 is a MOS tube
  • Q2 is a PNP transistor
  • W is an ultrasonic atomizer.
  • the working circuit of the ultrasonic atomizing sheet in the ultrasonic electronic cigarette includes a power module 1, a microprocessor 2, a high-frequency square wave generating circuit 3, and a resonant circuit 4;
  • the resonant circuit 4 includes an inductor L1 ,
  • the inductor L1 and the ultrasonic atomizing sheet W are connected into a series circuit, the first end of the inductor L1 and the negative electrode of the ultrasonic atomizing sheet W are electrically connected to the positive output end of the power module 1, and the positive electrode of the ultrasonic atomizing sheet W is electrically connected to the
  • the second end of the inductor L1 is electrically connected;
  • the output end of the microprocessor 2 is electrically connected to the control end of the high frequency square wave generating circuit 3;
  • the output end of the high frequency square wave generating circuit 3 is electrically connected to the second end of the inductor L1.
  • the chip model of the microprocessor 2 is ESM8BD10.
  • the high-frequency square wave generating circuit 3 includes a PWM amplifying circuit 301 and a MOS tube switching circuit 302; the output terminal of the microprocessor 2 is electrically connected to the inductor L1 through the PWM amplifying circuit 301 and the MOS tube switching circuit 302 in turn.
  • the PWM amplifier circuit 301 includes a first resistor R1, a square wave amplifier U1, and a second capacitor C2.
  • the MOS transistor switch circuit 302 includes a second resistor R2, a third resistor R3, and a MOS transistor Q1; the output of the microprocessor 2
  • the terminal is electrically connected to the input terminal of the square wave amplifier U1, the first resistor R1 is connected between the output terminal of the microprocessor 2 and the ground, the power terminal of the square wave amplifier U1 is grounded through the second capacitor C2, and the output of the square wave amplifier U1
  • the terminal is electrically connected to the gate of the MOS transistor Q1 through the second resistor R2, the third resistor R3 is connected between the gate of the MOS transistor Q1 and the ground, the source of the MOS transistor Q1 is grounded, and the drain of the MOS transistor Q1 is connected to the inductor through The second end of L1 is electrically connected.
  • the model of the square wave amplifier U1 is SDM48000.
  • the main working principle of the present invention is: After the PWM wave output by the microprocessor 2 is amplified by the PWM amplifier circuit 301, it is output to the MOS tube switching circuit 302 and used to control the continuous switching of the MOS tube Q1 to realize the continuous charging and discharging of the inductor L1. Thus, a high-frequency and high-voltage half-sine oscillating signal is generated on the inductor L1, and then it is loaded on the positive electrode of the ultrasonic atomizing sheet W.
  • the resonance circuit 4 oscillates under negative pressure.
  • the resonant circuit 4 also includes a first capacitor C1 connected in series in the series loop.
  • the capacitance value of the first capacitor C1 is relatively small, and it is mainly used to reduce or eliminate the interference effect of the parasitic capacitance in the ultrasonic atomizing sheet W, so that the resonance effect is better.
  • the working circuit of the ultrasonic atomizing sheet also includes a current collecting circuit 5 for collecting the working current between the source of the MOS tube Q1 and the ground.
  • the output terminal of the current collecting circuit 5 is electrically connected to the input terminal of the microprocessor 2.
  • the current collecting circuit 5 is used to collect the working current and send it to the microprocessor 2 so that the microprocessor 2 adjusts the frequency of the output PWM wave according to the magnitude of the working current, and finally realizes the power adjustment of the ultrasonic atomizer W.
  • the current acquisition circuit 5 includes a fourth resistor R4, a fifth resistor R5, and a third capacitor C3.
  • the fifth resistor R5 is connected between the source of the MOS transistor Q1 and the ground, and the source of the MOS transistor Q1 passes through the fourth resistor in turn R4 and the third capacitor C3 are grounded, and the input terminal of the microprocessor 2 is connected between the fourth resistor R4 and the third capacitor C3.
  • the power module 1 includes a battery 101 and a boosting module 102, and the battery 101 is electrically connected to the first end of the inductor L1 through the boosting module 102.
  • the battery 101 is used for power supply, and the boost chip in the boost module 102 is used to boost the voltage of the battery 101 to the voltage required by the resonance circuit 4, and the power supply module 1 has better versatility.
  • the battery 101 is a rechargeable battery, such as a rechargeable lithium battery.
  • the power module 1 also includes a charging circuit and a discharge protection circuit.
  • the structures of the charging circuit and the discharge protection circuit are not shown in the drawings, but they do not affect the understanding and implementation of the present invention by those skilled in the art.
  • the second embodiment repeats the first embodiment.
  • the second embodiment is also provided with a spike absorbing circuit 6 connected between the gate of the MOS transistor Q1 and the ground.
  • the microprocessor 2 outputs the PWM wave to the high-frequency square wave generating circuit 3.
  • the PWM wave controls the MOS tube Q1 in the high-frequency square wave generating circuit 3 to switch continuously, thereby continuously charging and discharging the inductor L1 in the resonance circuit 4.
  • the ultrasonic atomizing sheet W in the resonance circuit 4 oscillates to produce smoke.
  • a spike absorbing circuit 6 is connected to the gate of the MOS tube Q1, it is used to absorb the high voltage spikes back-pouring from the gate of the MOS tube Q1, thereby protecting the square wave amplifier U1 connected to the gate of the MOS tube Q1, and improving product reliability and quality. rate.
  • the spike absorption circuit 6 includes a PNP transistor Q2, the emitter of the PNP transistor Q2 is electrically connected to the gate of the MOS transistor Q1, the collector of the PNP transistor Q2 is grounded, and the base of the PNP transistor Q2 is connected to The output terminal of the square wave amplifier U1 is electrically connected.
  • the PNP transistor Q2 is a high withstand voltage PNP transistor, used to release the high voltage spike from the drain of the MOS transistor Q1 to the second resistor R2 through the junction capacitance between GD (gate-drain).

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Abstract

一种超声波雾化片(W)工作电路，包括电源模块(1)、微处理器(2)，其特征在于，还包括高频方波产生电路(3)和谐振电路(4)；谐振电路(4)包括电感(L1)，电感(L1)与超声波雾化片(W)连成串联回路，电感(L1)的第一端、超声波雾化片(W)的负极均与电源模块(1)的正输出端(VCC)电连接，超声波雾化片(W)的正极与电感(L1)的第二端电连接；微处理器(2)的输出端与高频方波产生电路(3)的控制端电连接；高频方波产生电路(3)的输出端与电感(L1)的第二端电连接，增大了超声波雾化片(W)的振幅，提高了振荡效率，增加了烟雾量；同时，在MOS管(Q1)栅极上增加一个尖峰吸收电路(6)，用来保护与MOS管(Q1)栅极相连的方波放大器(U1)，提高产品可靠性和良率。

Description

一种超声波雾化片工作电路、超声波电子烟 技术领域
本发明特别涉及一种超声波雾化片工作电路、超声波电子烟。
背景技术
现有的超声波雾化片工作电路中，超声波雾化片采用半波振荡方式工作，即，超声波雾化片的一端接电路板的地，另一端接振荡正极进行半正弦振荡，超声波雾化片只能从零点向一边(正半周期)反复振荡，振幅小，效率低，烟雾量小。
发明内容
本发明的目的在于，针对现有技术中超声波雾化片采用半波振荡方式存在的振幅小、效率低、烟雾量小的不足，提供一种超声波雾化片工作电路、超声波电子烟，对超声波雾化片加载负压，使得超声波雾化片从负周期越过零点到正周期不断振荡，增大了超声波雾化片的振幅，提高了振荡效率，增加了烟雾量。
为解决上述技术问题，本发明所采用的技术方案是：
一种超声波雾化片工作电路，包括电源模块、微处理器，其结构特点是还包括高频方波产生电路和谐振电路；所述谐振电路包括电感，所述电感与超声波雾化片连成串联回路，电感的第一端、超声波雾化片的负极均与电源模块的正输出端电连接，超声波雾化片的正极与电感的第二端电连接；微处理器的输出端与高频方波产生电路的控制端电连接；高频方波产生电路的输出端与电感的第二端电连接。
借由上述结构，微处理器输出PWM波至高频方波产生电路，继而在谐振电路的电感上产生一个高频高压的半正弦振荡信号，并加载到超声波雾化片的正极。由于超声波雾化片的负极接电源模块的正输出端VCC，因而在高频方波产生电路关断的瞬间，超声波雾化片的正极电压为Vw1＝0，超声波雾化片的负极电压为Vw2＝VCC，所以超声波雾化片两端的电压差就是Vw1-VWw2＝0-VCC＝-VCC，从而形成一个从-VCC即负压开始振荡到零点，再到正半周期的最大振幅的半正弦波振荡过程，谐振电路有负压振荡。
作为一种优选方式，所述高频方波产生电路包括PWM放大电路和MOS管开关电路；微处理器的输出端依次通过PWM放大电路、MOS管开关电路与电感电连接。
微处理器输出的PWM波经PWM放大电路放大后，输出至MOS管开关电路并用于控制MOS管开关电路的不断开关，实现对电感的不断充放电，从而在电感上产生一个高频高压的半正弦的振荡信号，然后加载到超声波雾化片的正极。
进一步地，所述谐振电路还包括串接在串联回路中的第一电容。
第一电容的电容值较小，主要用于降低或消除超声波雾化片中寄生电容的 干扰作用，使谐振效果更好。
作为一种优选方式，所述PWM放大电路包括第一电阻、方波放大器、第二电容，所述MOS管开关电路包括第二电阻、第三电阻和MOS管；微处理器的输出端与方波放大器的输入端电连接，第一电阻接在微处理器的输出端与地之间，方波放大器的电源端通过第二电容接地，方波放大器的输出端通过第二电阻与MOS管的栅极电连接，第三电阻接在MOS管的栅极与地之间，MOS管的源极接地，MOS管的漏极通过与电感第二端电连接。
借由上述结构，微处理器输出的PWM波经PWM放大电路放大后，输出至MOS管开关电路并用于控制MOS管的不断开关，实现对电感的不断充放电，从而在电感上产生一个高频高压的半正弦的振荡信号，然后加载到超声波雾化片的正极。由于超声波雾化片的负极接电源模块的正输出端VCC，因而在MOS管关断的瞬间，超声波雾化片的正极电压为Vw1＝0，超声波雾化片的负极电压为Vw2＝VCC，所以超声波雾化片的电压就是Vw1-VWw2＝0-VCC＝-VCC，从而形成一个从-VCC即负压开始振荡到零点，再到正半周期的最大振幅的半正弦波振荡过程，谐振电路有负压振荡。
进一步地，还包括用于采集MOS管的源极与地之间的工作电流的电流采集电路，电流采集电路的输出端与微处理器的输入端电连接。
电流采集电路用于采集工作电流并发送至微处理器，以便微处理器根据工作电流大小调节输出的PWM波的频率，最终实现超声波雾化片的功率调节。
作为一种优选方式，所述电流采集电路包括第四电阻、第五电阻、第三电容，第五电阻接在MOS管的源极与地之间，MOS管的源极依次通过第四电阻、第三电容接地，微处理器的输入端接在第四电阻与第三电容之间。
作为一种优选方式，所述电源模块包括电池和升压模块，电池通过升压模块与电感的第一端电连接。
用电池供电，并用升压模块中的升压芯片将电池电压升到谐振电路所需要的电压，电源模块通用性较好。
作为一种优选方式，所述电池为充电电池。
进一步地，还包括尖峰吸收电路，该尖峰吸收电路接在MOS管的栅极与地之间。
借由上述结构，工作时，微处理器输出PWM波至高频方波产生电路，PWM波控制高频方波产生电路中的MOS管不断开关，从而对谐振电路中的电感不断充放电，使得谐振电路中的超声波雾化片振荡产烟。本发明中，由于在MOS管栅极上连有尖峰吸收电路，用来吸收MOS管栅极上面倒灌过来的高压尖峰，从而保护与MOS管栅极相连的方波放大器，防止方波放大器被烧坏，提高产品可靠性和良率。
作为一种优选方式，所述尖峰吸收电路包括PNP型三极管，该PNP型三极管的发射极与MOS管的栅极电连接，PNP型三极管的集电极接地，PNP型三极管的基极与方波放大器的输出端电连接。
基于同一个发明构思，本发明还提供了一种超声波电子烟，其结构特点是包括所述的超声波雾化片工作电路。
与现有技术相比，本发明通过对超声波雾化片加载负压，使得超声波雾化片从负周期越过零点到正周期不断振荡，增大了超声波雾化片的振幅，提高了振荡效率，增加了烟雾量；同时，在MOS管栅极上增加一个尖峰吸收电路，用来吸收MOS管栅极上面倒灌过来的高压尖峰，从而保护与MOS管栅极相连的方波放大器，提高产品可靠性和良率。
附图说明
图1为本发明实施例一的电路框图。
图2为本发明实施例一的电路简图。
图3为本发明实施例二的电路框图。
图4为本发明实施例二的电路简图。
其中，1为电源模块，101为电池，102为升压模块，2为微处理器，3为高频方波产生电路，301为PWM放大电路，302为MOS管开关电路，4为谐振电路，5为电流采集电路，6为尖峰吸收电路，U1为方波放大器，L1为电感，C1为第一电容，C2为第二电容，C3为第三电容，R1为第一电阻，R2为第二电阻，R3为第三电阻，R4为第四电阻，R5为第五电阻，Q1为MOS管，Q2为PNP型三极管，W为超声波雾化片。
具体实施方式
实施例一
如图1和图2所示，超声波电子烟中的超声波雾化片工作电路包括电源模块1、微处理器2、高频方波产生电路3和谐振电路4；所述谐振电路4包括电感L1，所述电感L1与超声波雾化片W连成串联回路，电感L1的第一端、超声波雾化片W的负极均与电源模块1的正输出端电连接，超声波雾化片W的正极与电感L1的第二端电连接；微处理器2的输出端与高频方波产生电路3的控制端电连接；高频方波产生电路3的输出端与电感L1的第二端电连接。实施例中，微处理器2芯片型号为ESM8BD10。
所述高频方波产生电路3包括PWM放大电路301和MOS管开关电路302；微处理器2的输出端依次通过PWM放大电路301、MOS管开关电路302与电感L1电连接。
所述PWM放大电路301包括第一电阻R1、方波放大器U1、第二电容C2，所述MOS管开关电路302包括第二电阻R2、第三电阻R3和MOS管Q1；微处理器2的输出端与方波放大器U1的输入端电连接，第一电阻R1接在微处理器2的输出端与地之间，方波放大器U1的电源端通过第二电容C2接地，方波放大器U1的输出端通过第二电阻R2与MOS管Q1的栅极电连接，第三电阻R3接在MOS管Q1的栅极与地之间，MOS管Q1的源极接地，MOS管Q1的漏极通过与电感L1第二端电连接。实施例中，方波放大器U1型号为SDM48000。
本发明的主要工作原理为：微处理器2输出的PWM波经PWM放大电路 301放大后，输出至MOS管开关电路302并用于控制MOS管Q1的不断开关，实现对电感L1的不断充放电，从而在电感L1上产生一个高频高压的半正弦的振荡信号，然后加载到超声波雾化片W的正极。由于超声波雾化片W的负极接电源模块1的正输出端VCC，因而在MOS管Q1关断的瞬间，超声波雾化片W的正极电压为Vw1＝0，超声波雾化片W的负极电压为Vw2＝VCC，所以超声波雾化片W的电压就是Vw1-VWw2＝0-VCC＝-VCC，从而形成一个从-VCC即负压开始振荡到零点，再到正半周期的最大振幅的半正弦波振荡过程，谐振电路4有负压振荡。
所述谐振电路4还包括串接在串联回路中的第一电容C1。第一电容C1的电容值较小，主要用于降低或消除超声波雾化片W中寄生电容的干扰作用，使谐振效果更好。
超声波雾化片工作电路还包括用于采集MOS管Q1的源极与地之间的工作电流的电流采集电路5，电流采集电路5的输出端与微处理器2的输入端电连接。电流采集电路5用于采集工作电流并发送至微处理器2，以便微处理器2根据工作电流大小调节输出的PWM波的频率，最终实现超声波雾化片W的功率调节。
所述电流采集电路5包括第四电阻R4、第五电阻R5、第三电容C3，第五电阻R5接在MOS管Q1的源极与地之间，MOS管Q1的源极依次通过第四电阻R4、第三电容C3接地，微处理器2的输入端接在第四电阻R4与第三电容C3之间。
所述电源模块1包括电池101和升压模块102，电池101通过升压模块102与电感L1的第一端电连接。用电池101供电，并用升压模块102中的升压芯片将电池101电压升到谐振电路4所需要的电压，电源模块1通用性较好。
所述电池101为充电电池，如充电锂电池等。相应地，电源模块1还包括充电电路和放电保护电路，充电电路和放电保护电路的结构在附图中未示出，但并不影响本领域的技术人员对本发明的理解和实现。
实施例二
如图3和图4所示，实施例二重复实施例一，区别在于，实施例二中还设有尖峰吸收电路6，该尖峰吸收电路6接在MOS管Q1的栅极与地之间。工作时，微处理器2输出PWM波至高频方波产生电路3，PWM波控制高频方波产生电路3中的MOS管Q1不断开关，从而对谐振电路4中的电感L1不断充放电，使得谐振电路4中的超声波雾化片W振荡产烟。由于在MOS管Q1栅极上连有尖峰吸收电路6，用来吸收MOS管Q1栅极上面倒灌过来的高压尖峰，从而保护与MOS管Q1栅极相连的方波放大器U1，提高产品可靠性和良率。
具体地，所述尖峰吸收电路6包括PNP型三极管Q2，该PNP型三极管Q2的发射极与MOS管Q1的栅极电连接，PNP型三极管Q2的集电极接地，PNP型三极管Q2的基极与方波放大器U1的输出端电连接。PNP型三极管Q2为高耐压PNP型三级管，用来释放从MOS管Q1的漏极通过GD(栅漏极)间的 结电容倒灌到第二电阻R2上面的高压尖峰。
上面结合附图对本发明的实施例进行了描述，但是本发明并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是局限性的，本领域的普通技术人员在本发明的启示下，在不脱离本发明宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些均属于本发明的保护范围之内。

Claims (11)

  1. 一种超声波雾化片工作电路，包括电源模块(1)、微处理器(2)，其特征在于，还包括高频方波产生电路(3)和谐振电路(4)；所述谐振电路(4)包括电感(L1)，所述电感(L1)与超声波雾化片(W)连成串联回路，电感(L1)的第一端、超声波雾化片(W)的负极均与电源模块(1)的正输出端电连接，超声波雾化片(W)的正极与电感(L1)的第二端电连接；微处理器(2)的输出端与高频方波产生电路(3)的控制端电连接；高频方波产生电路(3)的输出端与电感(L1)的第二端电连接。
  2. 如权利要求1所述的超声波雾化片工作电路，其特征在于，所述高频方波产生电路(3)包括PWM放大电路(301)和MOS管开关电路(302)；微处理器(2)的输出端依次通过PWM放大电路(301)、MOS管开关电路(302)与电感(L1)电连接。
  3. 如权利要求1或2所述的超声波雾化片工作电路，其特征在于，所述谐振电路(4)还包括串接在串联回路中的第一电容(C1)。
  4. 如权利要求2所述的超声波雾化片工作电路，其特征在于，所述PWM放大电路(301)包括第一电阻(R1)、方波放大器(U1)、第二电容(C2)，所述MOS管开关电路(302)包括第二电阻(R2)、第三电阻(R3)和MOS管(Q1)；微处理器(2)的输出端与方波放大器(U1)的输入端电连接，第一电阻(R1)接在微处理器(2)的输出端与地之间，方波放大器(U1)的电源端通过第二电容(C2)接地，方波放大器(U1)的输出端通过第二电阻(R2)与MOS管(Q1)的栅极电连接，第三电阻(R3)接在MOS管(Q1)的栅极与地之间，MOS管(Q1)的源极接地，MOS管(Q1)的漏极通过与电感(L1)第二端电连接。
  5. 如权利要求4所述的超声波雾化片工作电路，其特征在于，还包括用于采集MOS管(Q1)的源极与地之间的工作电流的电流采集电路(5)，电流采集电路(5)的输出端与微处理器(2)的输入端电连接。
  6. 如权利要求5所述的超声波雾化片工作电路，其特征在于，所述电流采集电路(5)包括第四电阻(R4)、第五电阻(R5)、第三电容(C3)，第五电阻(R5)接在MOS管(Q1)的源极与地之间，MOS管(Q1)的源极依次通过第四电阻(R4)、第三电容(C3)接地，微处理器(2)的输入端接在第四电阻(R4)与第三电容(C3)之间。
  7. 如权利要求1所述的超声波雾化片工作电路，其特征在于，所述电源模块(1)包括电池(101)和升压模块(102)，电池(101)通过升压模块(102)与电感(L1)的第一端电连接。
  8. 如权利要求7所述的超声波雾化片工作电路，其特征在于，所述电池(101)为充电电池。
  9. 如权利要求4所述的超声波雾化片工作电路，其特征在于，还包括尖峰吸收电路(6)，该尖峰吸收电路(6)接在MOS管(Q1)的栅极与地之间。
  10. 如权利要求9所述的超声波雾化片工作电路，其特征在于，所述尖峰吸收电路(6)包括PNP型三极管(Q2)，该PNP型三极管(Q2)的发射极与MOS管(Q1)的栅极电连接，PNP型三极管(Q2)的集电极接地，PNP型三极管(Q2)的基极与方波放大器(U1)的输出端电连接。
  11. 一种超声波电子烟，其特征在于，包括如权利要求1～10任一项所述的超声波雾化片工作电路。
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