阅读说明：本技术 雾化片控制电路及雾化器装置 (Atomization piece control circuit and atomizer device ) 是由 杨鹏 张瑞 曾森 张标 汤亮 张志华 于 2021-07-26 设计创作，主要内容包括：本申请涉及一种雾化片控制电路,包括控制器、第一开关管、第二开关管、第一偏置电阻、第二偏置电阻和变压器,变压器包括原边绕组和副边绕组,变压器接入电源后,由于第一偏置电阻和第二偏置电阻的阻值不同,在原边绕组的第一抽头和第二抽头之间形成电势差,通过副边绕组上电压反馈到第一开关管和第二开关管,使得两个开关管一个导通一个截止来回往复,雾化片的等效电容切换充电和放电状态,能量在原边绕组与雾化片等效电容之间反复传输,使得在一定的频率范围内使电路工作趋于稳定,进入谐振状态。该电路可以使雾化片在一定的范围内工作,形成均匀稳定的雾化颗粒,提高雾化效果,从而提高了雾化片的使用可靠性。(The utility model relates to an atomizing piece control circuit, including the controller, first switch tube, the second switch tube, first biasing resistance, second biasing resistance and transformer, the transformer includes primary winding and secondary winding, after the transformer inserts the power, because the resistance of first biasing resistance and second biasing resistance is different, form the potential difference between the first tap and the second tap of primary winding, through the last voltage feedback of secondary winding to first switch tube and second switch tube, make two switch tubes one switch on one and cut off reciprocating back and forth, the equivalent capacitance switching of atomizing piece is charged and discharge state, energy is transmitted repeatedly between primary winding and atomizing piece equivalent capacitance, make circuit work tend to stability in certain frequency range, get into the resonance state. The circuit can enable the atomization sheet to work within a certain range, uniform and stable atomization particles are formed, the atomization effect is improved, and therefore the use reliability of the atomization sheet is improved.)

1. An atomization plate control circuit is characterized by comprising a controller, a first switching tube, a second switching tube, a first bias resistor, a second bias resistor and a transformer, wherein the transformer comprises a primary winding and a secondary winding;

the first end of the first switch tube and the first end of the second switch tube are both connected with the controller, the control end of the first switch tube is connected with the control end of the second switch tube sequentially through the first bias resistor and the second bias resistor, and the resistance values of the first bias resistor and the second bias resistor are different;

the second end of the first switching tube is connected with the first tap of the primary winding and is also used for connecting a first lead of an atomization sheet, the second end of the second switching tube is connected with the second tap of the primary winding and is also used for connecting a second lead of the atomization sheet, the third tap of the primary winding is used for being connected with a power supply, and the third tap of the primary winding is positioned between the first tap of the primary winding and the second tap of the primary winding;

the common end of the first bias resistor and the control end of the first switching tube is connected with a first tap of the secondary winding, and the common end of the second bias resistor and the control end of the second switching tube is connected with a second tap of the secondary winding.

2. The atomization plate control circuit of claim 1, further comprising a third switch tube, wherein a control end of the third switch tube is connected to the controller, a first end of the first switch tube and a first end of the second switch tube are both connected to a second end of the third switch tube, and a first end of the third switch tube is grounded.

3. The atomization fin control circuit of claim 2, further comprising a current limiting resistor, wherein the controller is connected to the control end of the third switching tube through the current limiting resistor.

4. The atomization plate control circuit of claim 1, further comprising a diode, wherein an anode of the diode is used for connecting to a power supply, and a cathode of the diode is connected to the third tap of the primary winding.

5. The atomization plate control circuit of claim 1, further comprising an inductor, wherein one end of the inductor is connected to a power supply, and the other end of the inductor is connected to a third tap of the primary winding.

6. The atomization plate control circuit of claim 1, wherein the third tap of the primary winding is located intermediate the first tap of the primary winding and the second tap of the primary winding.

7. The atomization chip control circuit of claim 1, wherein the first switch tube and the second switch tube are both triodes.

8. The atomization plate control circuit of claim 1, wherein the parameters of the first switch tube and the second switch tube are matched.

9. The atomization plate control circuit of claim 1, wherein the transformer is a high frequency transformer.

10. A nebulizer device comprising a nebulizer blade and a control circuit according to any one of claims 1 to 9.

Technical Field

The application relates to the technical field of atomizers, in particular to an atomizing sheet control circuit and an atomizer device.

Background

The atomizer is an instrument for atomizing a test solution. The atomizers are of various types, and can be roughly divided into air humidifiers, medical atomizing sheets and other types of atomizers according to different purposes, so that the application range is wide. The atomizer comprises an atomizing sheet, a water absorption cotton strip and a power supply, when the atomizer works, the water absorption cotton strip connects water in the water cup to the atomizing sheet by utilizing a capillary phenomenon, the power supply provides high-frequency alternating voltage to enable the metal sheet to vibrate, a small hole is formed in the central area of the metal sheet, and the metal sheet is flapped on the cotton strip to enable the water to be sprayed out from the hole to form atomized particles.

The conventional atomizing plate generates vibration by a high-frequency ac voltage supplied from a power supply, thereby atomizing water. However, when the ac voltage supplied by the power supply is not appropriate or unstable, the metal sheet may vibrate and disturb, which may cause unstable spraying, non-uniform atomized particles and poor atomization effect.

Disclosure of Invention

The invention provides an atomizing sheet control circuit and an atomizer device aiming at the problem of poor atomizing effect of a traditional atomizing sheet, and the atomizing sheet control circuit and the atomizer device can achieve the technical effect of improving the use reliability of an atomizer.

An atomization sheet control circuit comprises a controller, a first switch tube, a second switch tube, a first bias resistor, a second bias resistor and a transformer, wherein the transformer comprises a primary winding and a secondary winding;

the first end of the first switch tube and the first end of the second switch tube are both connected with the controller, the control end of the first switch tube is connected with the control end of the second switch tube sequentially through the first bias resistor and the second bias resistor, and the resistance values of the first bias resistor and the second bias resistor are different;

the second end of the first switching tube is connected with the first tap of the primary winding and is also used for connecting a first lead of an atomization sheet, the second end of the second switching tube is connected with the second tap of the primary winding and is also used for connecting a second lead of the atomization sheet, the third tap of the primary winding is used for being connected with a power supply, and the third tap of the primary winding is positioned between the first tap of the primary winding and the second tap of the primary winding;

the common end of the first bias resistor and the control end of the first switching tube is connected with a first tap of the secondary winding, and the common end of the second bias resistor and the control end of the second switching tube is connected with a second tap of the secondary winding.

An atomizer device, includes the atomizing piece and as above-mentioned atomizing piece control circuit.

The atomization sheet control circuit and the atomizer device comprise a controller, a first switch tube, a second switch tube, a first bias resistor, a second bias resistor and a transformer, wherein the transformer comprises a primary winding and a secondary winding, and based on the connection relation of the devices, after the transformer is connected with a power supply, because the resistance values of the first bias resistor and the second bias resistor are different, the currents at the second end of the first switch tube and the second end of the second switch tube are different, so that a potential difference is formed between a first tap and a second tap of the primary winding of the transformer, an induced electromotive force is formed on the secondary winding of the transformer, the voltage on the secondary winding of the transformer is fed back to the first switch tube and the second switch tube, one of the two switch tubes is switched on and off to reciprocate, the equivalent capacitance of the atomization sheet switches the charging and discharging states, and the equivalent capacitance of the primary winding of the transformer and the equivalent capacitance of the atomization sheet form a current loop, energy is repeatedly transmitted between the primary winding and the equivalent capacitor of the atomization sheet, so that the circuit works stably in a certain frequency range and enters a resonance state. The circuit can enable the atomization sheet to work within a certain range, uniform and stable atomization particles are formed, the atomization effect is improved, and therefore the use reliability of the atomization sheet is improved.

In one embodiment, the atomization plate control circuit further comprises a third switch tube, the control end of the third switch tube is connected with the controller, the first end of the first switch tube and the first end of the second switch tube are both connected with the second end of the third switch tube, and the first end of the third switch tube is grounded.

In one embodiment, the atomization plate control circuit further comprises a current-limiting resistor, and the controller is connected with the control end of the third switching tube through the current-limiting resistor.

In one embodiment, the atomization plate control circuit further comprises a diode, wherein the anode of the diode is used for connecting a power supply, and the cathode of the diode is connected with the third tap of the primary winding.

In one embodiment, the atomization plate control circuit further comprises an inductor, one end of the inductor is used for being connected with a power supply, and the other end of the inductor is connected with a third tap of the primary winding.

In one embodiment, the third tap of the primary winding is located intermediate the first tap of the primary winding and the second tap of the primary winding.

In one embodiment, the first switch tube and the second switch tube are both triodes.

In one embodiment, the parameters of the first switch tube and the second switch tube are matched.

In one embodiment, the transformer is a high frequency transformer.

Drawings

FIG. 1 is a schematic diagram of an embodiment of a control circuit for an atomizing plate;

FIG. 2 is an equivalent circuit diagram of the primary winding of one embodiment;

FIG. 3 is a block diagram of an embodiment of a control circuit for the atomization plate;

FIG. 4 is an equivalent circuit diagram before transformer decoupling in one embodiment;

FIG. 5 is an equivalent circuit diagram after decoupling of the transformer in one embodiment;

FIG. 6 is a first process resonance equivalent of the atomization plate control circuit in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described more fully below by way of examples in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In one embodiment, a control circuit for an atomizing plate is provided, referring to fig. 1, including a controller 100, a first switch tube 210, a second switch tube 220, a first bias resistor R1, a second bias resistor R2, and a transformer T1, where the transformer T1 includes a primary winding and a secondary winding, a first end of the first switch tube 210 and a first end of the second switch tube 220 are both connected to the controller 100, a control end of the first switch tube 210 is connected to a control end of the second switch tube 220 sequentially through the first bias resistor R1 and the second bias resistor R2, resistance values of the first bias resistor R1 and the second bias resistor R2 are different, a second end of the first switch tube 210 is connected to a first tap of the primary winding and is further used for connecting to a first lead of the atomizing plate, a second end of the second switch tube 220 is connected to a second tap of the winding and is further used for connecting to a second lead of the atomizing plate, a third tap of the primary winding is used for connecting to a power supply, the third tap of the primary winding is located between the first tap of the primary winding and the second tap of the primary winding, the common end of the first bias resistor R1 and the control end of the first switching tube 210 is connected with the first tap of the secondary winding, and the common end of the second bias resistor R2 and the control end of the second switching tube 220 is connected with the second tap of the secondary winding. Based on the connection relationship of these devices, after the transformer T1 is connected to a power supply, due to the difference in resistance between the first bias resistor R1 and the second bias resistor R2, the currents at the second end of the first switch tube 210 and the second end of the second switch tube 220 are different, so that a potential difference is formed between the first tap and the second tap of the primary winding of the transformer T1, an induced electromotive force is formed on the secondary winding of the transformer T1, a voltage on the secondary winding of the transformer T1 is fed back to the first switch tube 210 and the second switch tube 220, so that the two switch tubes are turned on and off to reciprocate back and forth, the equivalent capacitance of the atomizing sheet switches between charging and discharging states, the primary winding of the transformer T1 and the equivalent capacitance of the atomizing sheet form a current loop, energy is repeatedly transmitted between the primary winding and the equivalent capacitance of the atomizing sheet, so that the circuit works stably within a certain frequency range, a resonant state is entered. The circuit can enable the atomization sheet to work within a certain range, uniform and stable atomization particles are formed, the atomization effect is improved, and therefore the use reliability of the atomization sheet is improved.

Specifically, the atomization plate control circuit can be applied to an atomizer, is connected with an atomization plate in the atomizer and is used for controlling the work of the atomization plate. The controller 100 in the atomization plate control circuit can adopt the controller 100 originally existing in the atomizer, the related structure of the atomization plate control circuit is connected to the controller 100, and the related function of the atomization plate control circuit can be added to the original function of the controller 100, so that the hardware cost is saved. Or, the controller 100 in the control circuit of the atomizing plate can also be a newly added controller 100, which does not affect the function of the original controller 100 in the atomizer and improves the accuracy of control. The controller 100 is connected to the first end of the first switch and the first end of the second switch tube 220, and the controller 100 can send high and low levels to the first end of the first switch tube 210 and the first end of the second switch tube 220, so as to control whether the atomization sheet control circuit works. The type of the controller 100 is not exclusive, and in this embodiment, the controller 100 may be a single chip microcomputer, and the single chip microcomputer may be powered by a 5V power supply to ensure the working performance.

The control end of the first switch tube 210 is connected to the control end of the second switch tube 220 sequentially through the first bias resistor R1 and the second bias resistor R2, that is, the control end of the first switch tube 210 is connected to the first bias resistor R1, the control end of the second switch tube 220 is connected to the second bias resistor R2, and the first bias resistor R1 and the second bias resistor R2 enable the voltage of the first end of the first switch tube 210 and the first end of the second switch tube 220 to be pulled low when no driving signal exists, so that the circuit is more reliable. The first bias resistor R1 and the second bias resistor R2 have different resistances, and due to the asymmetry between the first bias resistor R1 and the second bias resistor R2, the maximum current at the second end of the first switch tube 210 and the maximum current at the second end of the second switch tube 220 have different magnitudes, and the differential of the currents is different in the same time. In addition, the second end of the first switching tube 210 is connected to the first tap of the primary winding, and the second end of the second switching tube 220 is connected to the second tap of the primary winding, so that a voltage difference is formed between the first tap and the second tap of the primary winding. It is understood that the first tap of the primary winding may be a start tap of the primary winding, and the second tap of the primary winding may be an end tap of the primary winding, i.e. the entire primary winding is included between the first tap and the second tap of the primary winding. Alternatively, in other embodiments, the first tap and the second tap of the primary winding may also be taps in the middle of the primary winding, and the winding between the first tap and the second tap of the primary winding is the winding that is put into use.

The third tap of the primary winding is used for being connected with a power supply, the power supply is also a power supply of the atomizing sheet control circuit, the size of the power supply is not unique, and in the embodiment, the power supply can be a power supply for providing 12V voltage. The third tap of the primary winding is located between the first tap of the primary winding and the second tap of the primary winding, and the primary winding is divided into two parts. Since both the primary winding and the secondary winding of the transformer T1 can be equivalent to inductors, the third tap of the primary winding divides the primary winding into two inductors. The equivalent inductance between the first tap and the third tap is referred to as the equivalent inductance of the first primary winding, the equivalent inductance between the second tap and the third tap is referred to as the equivalent inductance of the second primary winding, and an equivalent circuit diagram of the primary winding can be seen in fig. 2. The first tap of the primary winding is also used for being connected with a first lead of the atomization sheet, the second tap of the primary winding is also used for being connected with a second lead of the atomization sheet, the atomization sheet can be equivalent to a capacitor, and different atomization sheets can be equivalent to equivalent capacitors with different capacitance values. The first lead and the second lead of the atomization plate can be respectively regarded as two ends of an equivalent capacitor C1 of the atomization plate, namely, one end of the equivalent inductor of the first primary winding, which is not connected with the power supply, is connected with the first end of the equivalent capacitor C1 of the atomization plate, and one end of the equivalent inductor of the second primary winding, which is not connected with the power supply, is connected with the second end of the equivalent capacitor C1 of the atomization plate.

After a voltage difference is formed between the first tap and the second tap of the primary winding, an induced electromotive force is formed on the secondary winding of the transformer T1, the control end of the first switching tube 210 is connected to the first tap of the secondary winding, and the common end of the control end of the second switching tube 220 is connected to the second tap of the secondary winding. The induced electromotive force on the secondary winding makes the voltages at the control end of the first switching tube 210 and the control end of the second switching tube 220 rise and fall one by one, so that one of the first switching tube 210 and the second switching tube 220 is switched on and off, the first primary winding equivalent inductance, the second primary winding equivalent inductance and the atomization sheet equivalent capacitor C1 resonate, and the atomization sheet equivalent capacitor C1 is in a charging or discharging state. When the resonant voltage of the atomization plate equivalent capacitor C1 is 0, the atomization plate equivalent capacitor C1 switches the working state, the first switch tube 210 and the second switch tube 220 are in a state opposite to the previous process, and are turned on and turned off, and the atomization plate equivalent capacitor C1 is in a state opposite to the previous process, i.e., in a charging or discharging state. When the resonance voltage of the atomization plate equivalent capacitor C1 is 0 again, the current process is finished, the circuit returns to the previous state to work, and the operation is repeated. The first primary winding equivalent inductor, the second primary winding equivalent inductor and the atomization sheet equivalent capacitor C1 form a current loop, the atomization sheet equivalent capacitor C1 switches the charging and discharging working states according to the conduction states of the first switch tube 210 and the second switch tube 220, and energy is repeatedly transmitted in the inductors and the capacitors to form resonance. When the atomization sheet control circuit is required to stop working, the controller 100 can control the voltage states of the first end of the first switch tube 210 and the first end of the second switch tube 220 to control other devices in the atomization sheet control circuit, and the atomization sheet control circuit is simple in structure and high in efficiency.

In one embodiment, referring to fig. 3, the atomization plate control circuit further includes a third switch tube, a control end of the third switch tube is connected to the controller 100, a first end of the first switch tube 210 and a first end of the second switch tube 220 are both connected to a second end of the third switch tube, and the first end of the third switch tube is grounded. The controller 100 is connected with a control end of a third switch tube, the controller 100 can send a high level or a low level to the control end of the third switch tube, the third switch tube may be in a conducting or stopping state when the control end receives the high level or the low level, when the third switch tube is conducted, the first switch tube 210 and the second switch tube 220 start to work, when the third switch tube is stopped, the atomizing sheet control circuit stops working, the controller 100 controls whether the atomizing sheet control circuit works or not by controlling the level at the control end of the third switch tube, the on-off of large current can be controlled by small current, and the use is convenient.

Specifically, the type of the third switch tube is not exclusive, and in the present embodiment, the third switch tube is an NPN transistor, which is referred to as a third transistor Q3. The base of the third transistor Q3 is connected to the controller 100, the collector of the third transistor Q3 is connected to the first end of the first switch tube 210 and the first end of the second switch tube 220, and the emitter of the third transistor Q3 is grounded. When the controller 100 supplies a high level to the base of the third transistor Q3, the third transistor Q3 turns on and the rest of the atomizing plate control circuit begins to operate. When the controller 100 transmits a low level to the base electrode of the third triode Q3, the third triode Q3 is cut off, the atomizing sheet control circuit stops working, the on-off of a large current can be controlled by a small current, and the use is reliable. It is understood that in other embodiments, the third switch tube may be of other types as long as the implementation is considered by those skilled in the art.

In one embodiment, referring to fig. 3, the atomization plate control circuit further includes a current limiting resistor R3, and the controller 100 is connected to the control terminal of the third switching tube through the current limiting resistor R3. The current limiting resistor R3 can limit the current flowing to the control end of the third switching tube, so that the third switching tube is prevented from being burnt due to the fact that the current at the control end of the third switching tube is too large, and the working performance of the third switching tube is improved. The resistance of the current limiting resistor R3 is not exclusive and can be selected according to actual needs, as long as one skilled in the art can realize the current limiting resistor R3.

In one embodiment, referring to fig. 3, the atomization plate control circuit further includes a diode D1, an anode of the diode D1 is used for connecting to a power supply, and a cathode of the diode D1 is connected to the third tap of the primary winding. The diode D1 is located between the power supply and the transformer T1, and plays a role of unidirectional conduction, limiting current from flowing from the power supply to the primary winding of the transformer T1 only, and isolating, because current cannot flow through the diode D1 in the reverse direction. In addition, the diode D1 can withstand a relatively high reverse voltage, thereby functioning as a reverse blocking.

In one embodiment, referring to fig. 3, the atomization plate control circuit further includes an inductor L0, one end of the inductor is used for connecting to a power supply, and the other end of the inductor is connected to the third tap of the primary winding. The inductor is positioned between the power supply and the transformer T1 and can be used as a damping inductor to reduce current ripples and improve current quality, so that the working performance of the transformer T1 is improved. The inductance of the inductor is not unique and can be selected according to the equivalent inductance of the primary winding of the transformer T1, for example, in this embodiment, the inductance of the inductor is greater than five times the equivalent inductance of the primary winding of the transformer T1, and the filtering effect is good. In an expanded way, when the atomization plate control circuit further comprises a diode D1, the anode of the diode D1 is connected to the power supply, the cathode of the diode D1 is connected to one end of the inductor, and the other end of the inductor is connected to the third tap of the primary winding. Therefore, the diode D1 and the inductor are connected in series on the same branch circuit to complete rectification and filtering of the output current of the power supply, and the quality of the current received by the transformer T1 is improved, so that the working stability of the transformer T1 is improved.

In one embodiment, the third tap of the primary winding is located intermediate the first tap of the primary winding and the second tap of the primary winding. When the third tap of the primary winding is located between the first tap of the primary winding and the second tap of the primary winding, the equivalent inductance between the first tap and the third tap is called the first primary winding equivalent inductance, the equivalent inductance between the second tap and the third tap is called the second primary winding equivalent inductance, and then the inductance values of the first primary winding equivalent inductance and the second primary winding equivalent inductance are equal. The first primary winding equivalent inductance, the second primary winding equivalent inductance and the atomization sheet equivalent capacitance C1 form a current loop and generate resonance. When the inductance values of the first primary winding equivalent inductance and the second primary winding equivalent inductance are equal, the atomization sheet equivalent capacitance C1 can obtain a relatively intact sine wave, the working stability of the circuit is improved, and the atomization effect is improved.

In one embodiment, the first switch tube 210 and the second switch tube 220 are both triodes. When the first switch tube 210 and the second switch tube 220 are both triodes, the first switch tube 210 and the second switch tube 220 have a current amplification effect, can control the variation of a large current of a collector electrode by a small current of a base electrode, can also control the on-off of a circuit according to the on-off state of the circuit, and has high switching efficiency.

Specifically, when the first switch tube 210 and the second switch tube 220 are both transistors, the first switch tube 210 is a first transistor Q1, and the second switch tube 220 is a second transistor Q2. Further, the first transistor Q1 and the second transistor Q2 may be both NPN transistors. Taking the atomization plate control circuit including the third switching tube as an example, the base of the first triode Q1 is connected with the first bias resistor R1, the emitter of the first triode Q1 is connected with the second end of the third switching tube, the collector of the first triode Q1 is connected with the first tap of the primary winding, and is also connected with the first lead of the atomization plate equivalent capacitor C1. The base electrode of the second triode Q2 is connected with the second bias resistor R2, the emitter electrode of the second triode Q2 is connected with the second end of the third switching tube, the collector electrode of the second triode Q2 is connected with the second tap of the primary winding, and the second lead wire of the atomization slice equivalent capacitor C1 is further connected.

When the atomization slice control circuit includes a third switching tube, which is the third transistor Q3, for example, when the controller 100 gives a high level to the base ctrl of the third transistor Q3, the third transistor Q3 is in saturation conduction. Due to the asymmetry of the first bias resistor R1 and the second bias resistor R2 (e.g., R1 < R2), the collector of the first transistor Q1 has the maximum current I_cq1maxIs larger than the maximum collector current I of the second triode Q2_cq2maxAt the same time, there is dI_cq1/dt>dI_cq2/dt of which I_cq1Is the collector current of the first triode_cq2Is the collector current of the second triode. The first tap of the primary winding of the transformer T1 is position 1, the third tap of the primary winding is position 2, the second tap of the primary winding is position 3, the first tap and the second tap of the primary winding are taps at two ends of the primary winding respectively, the third tap of the primary winding is a tap between the first tap and the second tap of the primary winding, and the first tap and the third tap are tapsThe inductance between the second tap and the third tap is L1, L2, L1-L2-L. Two ends of a primary winding of the transformer T1U 13 ═ 2L (dI2/dt-dI1/dt)<0, where I1 is the current of the branch where the collector of the first triode is located, and I2 is the current of the branch where the collector of the second triode is located.

The first tap of the secondary winding of transformer T1 is at position 5 and the first tap of the secondary winding of transformer T1 is at position 4. Since the coupling coefficient of the transformer T1 can be approximately regarded as 1, the mutual inductance ratio M between the primary taps is L1L 2L. Therefore, according to the dotted terminal U45<0 of the transformer T1, the induced electromotive force raises the base potential of the first triode Q1 to form positive feedback to the first triode Q1, the negative feedback is formed to the second triode Q2, finally the first triode Q1 is turned on, and the second triode Q2 is turned off. The voltage of the atomization plate equivalent capacitor C1 is up-down negative and positive.

After the first triode Q1 is turned on and the second triode Q2 is turned off, L1, L2 and the capacitor atomization sheet equivalent capacitor C1 resonate, and the resonant voltage: uc ═ sin ω t, whereWhen the voltage resonance of the equivalent capacitor C1 of the atomizing plate is zero, the first process is finished. When the atomization plate equivalent capacitor C1 is fully charged and then discharges to zero, the conduction current of the second triode Q2 begins to increase from 0, so dI exists in the same time_c1/dt<dI_c2Dt, transformer T1 primary winding two ends U13 ═ 2L (dI2/dt-dI1/dt)>0，U45>And 0, the second triode Q2 is conducted, the first triode Q1 is cut off, and the voltage of the atomization sheet equivalent capacitor C1 is positive and negative. When the voltage resonance of the equivalent capacitor C1 of the atomizing plate is positive, negative and positive, the secondary winding induces electromotive force U45>And 0, the induced electromotive force enables the base electrode potential of the first triode Q1 to fall, the base electrode potential of the second triode Q2 to rise, the second triode Q2 forms positive feedback, finally, the first triode Q1 is cut off, the second triode Q2 is conducted, and when the voltage resonance of the atomization sheet equivalent capacitor C1 is zero, the second process is finished. The resonance diagram of the second process is the same as that of the first process, only the positions of L1 and L2 are exchanged, so that the voltage direction of the equivalent capacitor C1 of the capacitive atomization plate is changed, and the equivalent electricity of the atomization plate is changedThe waveform across the capacitor C1 is a sine wave. And after the second process is finished, returning to the first process, and performing reciprocating operation. When ctrl is high, the circuit starts to work according to the above-mentioned process, and when ctrl is low, this resonance state is closed, and the circuit does not work.

Due to the characteristic of parallel resonance, the current flowing through the main circuit at resonance is very small, i.e., the current flowing through the collector of the third transistor Q3 is very small, because the currents of the branches of the capacitance and inductance cancel each other out, and the theoretical main circuit current is 0. However, actually, due to the influence of parasitic parameters of the circuit and the like, the main circuit current exists, but the current ratio of each branch circuit is very small and can be ignored, L1, L2 and C1 can be regarded as a current loop as shown in fig. 4, energy is repeatedly transmitted between an inductor and a capacitor to form resonance, after the transformer T1 is decoupled as shown in fig. 5, the resonance frequency is changed

In one embodiment, the parameters of the first switch tube 210 and the second switch tube 220 are matched. Specifically, the parameter matching between the first switch tube 210 and the second switch tube 220 may be the same as the parameter matching between the first switch tube 210 and the second switch tube 220, so that the equivalent capacitor C1 of the atomizing plate can obtain a perfect sine wave, thereby improving the stability of the circuit operation and the atomizing effect.

In one embodiment, transformer T1 is a high frequency transformer. The high-frequency transformer is a power transformer T1 with the working frequency exceeding the intermediate frequency (10kHz), and can be divided into several grades according to the working frequency: 10kHz-50kHz, 50kHz-100kHz, 100 kHz-500 kHz, 500 kHz-1 MHz and more than 10 MHz. The working frequency of the control circuit of the atomizing plate is generally within the range of 100 KHz-10 MHz, so that the working performance of the control circuit of the atomizing plate can be guaranteed by applying a high-frequency transformer.

For a better understanding of the above embodiments, the following detailed description is given in conjunction with a specific embodiment. In an embodiment, referring to fig. 1 and 3, the atomization sheet control circuit includes a controller 100, a first switching tube 210, a second switching tube 220, a first bias resistor R1, a second bias resistor R2, a transformer T1, a third switching tube, a current limiting resistor R3, a diode D1, and an inductor, where the first switching tube 210, the second switching tube 220, and the third switching tube are NPN triodes, the first bias resistor R1 and the second bias resistor R2 respectively provide base current bias for the first switching tube 210 and the second switching tube 220, the inductor is a damping inductor, the transformer T1 is a high-frequency transformer, the atomization sheet control circuit supplies power to 12V, the controller 100 is a single chip microcomputer, the controller 100 controls whether the atomization sheet control circuit operates through a CTRL port, and the power supply of the single chip microcomputer is 5V. The first switch tube 210 and the second switch tube 220 control the circuit to work or stop, stop when the circuit is cut off, and output two square waves with a half period difference when the circuit is conducted. The inductance is used to reduce current ripple, L0> 10L. When the third switching tube is switched on, the circuit starts to work, and when the third switching tube is switched off, the circuit stops working.

Specifically, when ctrl is high, Q3 is turned on in saturation due to the asymmetry of the base resistances of transistors Q1 and Q2 (R1)<R2), the maximum collector current has I_cq1max>I_cq2maxAt the same time, there is dI_cq1/dt>dI_cq2Dt, transformer T1 primary winding two ends U13 ═ 2L (dI2/dt-dI1/dt)<0。

The primary winding inductance of the transformer T1 is L1 and L2, and L1 is L2 is L because of the center tap. Since the coupling coefficient of the transformer T1 can be approximately regarded as 1, the mutual inductance ratio M between the primary taps is L1L 2L. Therefore, according to the homonymous terminal U45<0 of the transformer T1, the induced electromotive force causes the base potential of the Q1 to rise, positive feedback is formed on the Q1, negative feedback is formed on the Q2, finally the Q1 is turned on, the Q2 is turned off, and the voltage of the C1 is up-negative and down-positive.

When the Q1 is turned on and the Q2 is turned off, the L1, the L2 and the capacitor C1 resonate, and the resonant voltage: uc ═ sin ω t, whereWhen the C1 voltage resonance is zero, the first process ends, and the resonance equivalent diagram of the first process is shown in fig. 6. After C1 is full, discharge is carried out to zero, and at the moment, Q2 starts to increase the conduction current from 0, so dI exists in the same time_c1/dt<dI_c2Dt, transformer T1 primary winding two ends U13 ═ 2L (dI2/dt-dI1/dt)>0，U45>0, Q2 is conducted, Q1 is cut off, and the voltage of C1 is positive, negative and up. When the resonance of the voltage of C1 is positive, negative, the secondary winding induces electromotive force U45>0, the induced electromotive force causes the base potential of the Q1 to fall, the base potential of the Q2 to rise, the Q2 forms positive feedback, and finally the Q1 is cut off, the Q2 is conducted, and when the C1 voltage resonance is zero, the second process is ended. The resonance diagram of the second process is the same as that of the first process, only the positions of L1 and L2 are exchanged, so that the voltage direction of the capacitor C1 is changed, and the waveform at two ends of the C1 is a sine wave. And after the second process is finished, returning to the first process, and performing reciprocating operation. When ctrl is high, the circuit starts to work according to the above-mentioned process, and when ctrl is low, this resonance state is closed, and the circuit does not work.

Due to the characteristics of parallel resonance, the current flowing through the main circuit is small (i.e. the current flowing through the collector of Q3) during resonance, because the currents of the branches of the capacitive inductor cancel each other out, the theoretical main circuit current is 0, but actually due to the influence of parasitic parameters of the circuit and the like, the main circuit current exists, but the current of each branch is small and can be ignored, L1, L2 and C1 can be regarded as a current loop (as shown in fig. 4), and energy is repeatedly transmitted between the inductor and the capacitor to form resonance. After transformer T1 is decoupled as in fig. 5, transformer T1 decoupling refers to the equivalent transformation between the windings of transformer T1, i.e., from fig. 4 to fig. 5.

The atomization plate control circuit comprises a controller 100, a first switch tube 210, a second switch tube 220, a first bias resistor R1, a second bias resistor R2 and a transformer T1, wherein the transformer T1 comprises a primary winding and a secondary winding, and based on the connection relationship of the devices, after the transformer T1 is connected with a power supply, because the resistance values of the first bias resistor R1 and the second bias resistor R2 are different, the currents at the second end of the first switch tube 210 and the second end of the second switch tube 220 are different, so that a potential difference is formed between the first tap and the second tap of the primary winding of the transformer T1, an induced electromotive force is formed on the secondary winding of the transformer T1, the voltage on the secondary winding of the transformer T1 is fed back to the first switch tube 210 and the second switch tube 220, one of the two switch tubes is conducted and one is cut off to reciprocate, and the equivalent capacitance of the atomization plate switches the charging and discharging states, the primary winding of the transformer T1 and the equivalent capacitor of the atomization sheet form a current loop, and energy is repeatedly transmitted between the primary winding and the equivalent capacitor of the atomization sheet, so that the circuit works stably in a certain frequency range and enters a resonance state. The circuit can enable the atomization sheet to work within a certain range, uniform and stable atomization particles are formed, the atomization effect is improved, and therefore the use reliability of the atomization sheet is improved.

In one embodiment, a nebulizer device is provided that includes a nebulizing patch and a nebulizing patch control circuit as described above.

The atomizer device comprises a controller 100, a first switch tube 210, a second switch tube 220, a first bias resistor R1, a second bias resistor R2 and a transformer T1, wherein the transformer T1 comprises a primary winding and a secondary winding, and based on the connection relationship of the devices, after the transformer T1 is connected with a power supply, the currents at the second end of the first switch tube 210 and the second end of the second switch tube 220 are different due to the difference of the resistance values of a first bias resistor R1 and a second bias resistor R2, so that a potential difference is formed between the first tap and the second tap of the primary winding of the transformer T1, an induced electromotive force is formed on the secondary winding of the transformer T1, the voltage on the secondary winding of the transformer T1 is fed back to the first switch tube 210 and the second switch tube 220, the two switch tubes are switched on and off to reciprocate, and the equivalent capacitance of the atomization piece is switched between a charging state and a discharging state, the primary winding of the transformer T1 and the equivalent capacitor of the atomization sheet form a current loop, and energy is repeatedly transmitted between the primary winding and the equivalent capacitor of the atomization sheet, so that the circuit works stably in a certain frequency range and enters a resonance state. The circuit can enable the atomization sheet to work within a certain range, uniform and stable atomization particles are formed, the atomization effect is improved, and therefore the use reliability of the atomization sheet is improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.