CN113521455A

CN113521455A - Atomizer drive arrangement and atomizer equipment

Info

Publication number: CN113521455A
Application number: CN202110841983.1A
Authority: CN
Inventors: 曾森; 张瑞; 张标; 蓝剑锋; 刘书奇
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2021-10-22

Abstract

The present application relates to an atomizer control device and an atomizer apparatus. Comprises an amplitude adjusting circuit, a filter circuit, a comparator, a voltage detection circuit, a switching tube and an inductor, wherein the amplitude adjusting circuit is used for accessing a reference signal matched with the resonance frequency of the atomizer, after the amplitude adjusting circuit adjusts the amplitude of the accessed reference signal, the filter circuit changes the reference signal into a stable signal and transmits the stable signal to a first input end of the comparator, the voltage detection circuit detects that the voltage of the atomizer is transmitted to a second input end of the comparator, the comparator continuously compares the signals of the two input ends to output square wave signals, controls the on-off of the switch tube to enable the atomizer to resonate, the power is constant within a certain range, so that different resonant frequencies are provided for different atomizing plates, the atomizing effect is improved, the method is based on hardware implementation, simplicity and reliability are realized, and the use reliability of the atomizer is improved.

Description

Atomizer drive arrangement and atomizer equipment

Technical Field

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

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. For example, with the popularization of the handheld atomizer, most patients in the market can select the medical atomizer as a treatment tool for treating respiratory diseases, and the treatment effect is very remarkable. When the atomizer works, the water in the water cup is connected to the atomizing sheet through the water absorption cotton strip, the power supply provides high-frequency alternating voltage to enable the metal sheet to vibrate, the central area of the metal sheet is provided with tiny holes, and the tiny holes are flapped on the cotton strip to enable water to be sprayed out of the holes to form atomized particles.

However, the atomizer can have some matching problems in the production and use process, and it is common that the atomization effect is different for the same atomizer fuselage to match different atomization heads, and the fundamental reason is that there is a small capacitance difference between the atomization heads, so the resonant frequency of the circuit of the atomizer and the atomization piece will have a difference, when the given frequency of the circuit of the atomizer is fixed, it is unable to adapt to different atomization pieces, the atomization effect is affected, and the use is unreliable.

Disclosure of Invention

The invention provides an atomizer control device and atomizer equipment aiming at the problem that the traditional atomizer is unreliable in use, and the atomizer control device and the atomizer equipment can achieve the technical effect of improving the use reliability of the atomizer.

An atomizer driving device comprises an amplitude adjusting circuit, a filter circuit, a comparator, a voltage detection circuit, a switching tube and an inductor, wherein the amplitude adjusting circuit is used for accessing a reference signal, and the reference signal is matched with the resonant frequency of an atomizer;

the amplitude adjustment circuit is connected with the filter circuit, the filter circuit is connected with the first input end of the comparator, one end of the inductor is connected with the power supply, the other end of the inductor is used for connecting a first lead of the atomizer, the voltage detection circuit is used for connecting a second lead of the atomizer, the voltage detection circuit is connected with the second input end of the comparator, the output end of the comparator is connected with the control end of the switch tube, the first end of the switch tube is connected with the end, far away from the power supply, of the inductor, and the second end of the switch tube is connected with the voltage detection circuit.

An atomizer apparatus comprising an atomizer and an atomizer driving device as described above.

The atomizer driving device and the atomizer equipment comprise an amplitude adjusting circuit, a filter circuit, a comparator, a voltage detecting circuit, a switch tube and an inductor, wherein the amplitude adjusting circuit is used for accessing a reference signal, the reference signal is matched with the resonant frequency of the atomizer, after the amplitude adjusting circuit adjusts the amplitude of the accessed reference signal, the reference signal is changed into a stable signal through the filter circuit and is transmitted to a first input end of the comparator, the voltage detecting circuit detects the voltage of the atomizer and transmits the voltage to a second input end of the comparator, because the reference signal is matched with the resonant frequency of the atomizer, the inductor and the atomizer form the resonant circuit, the comparator can continuously compare the signals of the two input ends, after comparison, the comparator can output a square wave signal to control the on-off of the switch tube to enable the atomizer to resonate, and the two ends of the comparator can continuously compare the size, the power is constant within a certain range, so that different resonant frequencies are provided for different atomizing plates, the atomizing effect is improved, the method is based on hardware implementation, simplicity and reliability are realized, and the use reliability of the atomizer is improved.

In one embodiment, the amplitude adjustment circuit includes a first resistor and a second resistor, one end of the first resistor is used for accessing a reference signal, the other end of the first resistor is connected to the second resistor, a common end of the first resistor and the second resistor is connected to the filter circuit, and an end of the second resistor, which is far away from the first resistor, is grounded.

In one embodiment, the filter circuit comprises a first capacitor, a common terminal of the first resistor and the second resistor is connected to a first terminal of the first capacitor, and a second terminal of the first capacitor is grounded.

In one embodiment, the voltage detection circuit comprises a current conversion unit and a filtering unit, the filtering unit is connected with the second input end of the comparator and is also connected with the current conversion unit, and a common end of the current conversion unit and the filtering unit is connected with the second end of the switch tube and is also used for being connected with a second lead of the atomizer.

In one embodiment, the current converting unit includes a third resistor, a common end of the second ends of the switch tube and the filtering unit is connected to a first end of the third resistor, the first end of the third resistor is further used for connecting a second lead of the atomizer, and a second end of the third resistor is grounded.

In one embodiment, the filter unit includes a fourth resistor, a second capacitor, and a third capacitor, a first end of the fourth resistor is connected to a first end of the third resistor, a common end of the second capacitor and the third capacitor is connected to a second end of the third resistor, an end of the second capacitor far away from the third capacitor is grounded, and an end of the third capacitor far away from the second capacitor is grounded.

In one embodiment, the nebulizer drive apparatus further comprises a pull-up resistor connected to the comparator.

In one embodiment, the atomizer driving device further comprises an anti-interference resistor, wherein one end of the anti-interference resistor is connected with the control end of the switch tube, and the other end of the anti-interference resistor is connected with the second end of the switch tube.

In one embodiment, the switching tube is a MOS tube.

Drawings

FIG. 1 is a block diagram showing the construction of an atomizer driving device according to an embodiment;

fig. 2 is a schematic structural view of an atomizer driving device according to an 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, referring to fig. 1, a driving apparatus for a nebulizer is provided, which includes an amplitude adjusting circuit 110, a filter circuit 120, a comparator U8-a, the voltage detection circuit 140, the switching tube 130 and the inductor L2, the amplitude adjustment circuit 110 is used for accessing a reference signal, the reference signal is matched with the resonant frequency of the atomizer, the amplitude adjustment circuit 110 is connected with the filter circuit 120, the filter circuit 120 is connected with a first input end of a comparator U8-A, one end of the inductor L2 is connected with a power supply, the other end of the inductor L2 is connected with a first lead wire of the atomizer, the voltage detection circuit 140 is used for connecting a second lead wire of the atomizer, the voltage detection circuit 140 is connected with a second input end of the comparator U8-A, an output end of the comparator U8-A is connected with a control end of the switching tube 130, a first end of the switching tube 130 is connected with one end, away from the power supply, of the inductor L2, and a second end of the switching tube 130 is connected with the voltage detection circuit 140. The amplitude adjusting circuit 110 is connected to adjust the amplitude of the reference signal, the reference signal is changed into a stable signal through the filter circuit 120, the stable signal is transmitted to a first input end of the comparator U8-A, the voltage of the atomizer is detected by the voltage detection circuit 140 and is transmitted to a second input end of the comparator U8-A, because the reference signal is matched with the resonant frequency of the atomizer, the inductor L2 and the atomizer form a resonant circuit, the signals of the two input ends are continuously compared by the comparator U8-A, the comparator U8-A can output a square wave signal after comparison, the on-off of the switching tube 130 is controlled, the atomizer resonates, the two ends of the comparator U8-A can continuously compare the amplitude, the power is constant in a certain range, thereby realizing that different resonant frequencies are provided for different atomization pieces, and improving the atomization effect, and the method is realized based on hardware, is simple and reliable, and improves the use reliability of the atomizer.

Specifically, the atomizer driving device is used for driving the atomizer, and the atomizer can be a handheld atomizer, and can also be an atomizer with other atomizing plates, such as a desktop atomizer with alternating current inserted therein. The atomizer drive arrangement is specifically connected with the atomizing piece in the atomizer, and the atomizing piece can be equivalent to electric capacity, and different atomizing pieces can be equivalent to the equivalent capacitance H1 of different appearance values. The first lead and the second lead of the atomizer can be regarded as two ends of the atomization sheet equivalent capacitor H1 respectively, that is, the inductor L2 is connected to the first end of the atomization sheet equivalent capacitor H1, and the voltage detection circuit 140 is connected to the second end of the atomization sheet equivalent capacitor H1. The reference signal matches the resonant frequency of the nebulizer, i.e. the frequency of the reference signal is closer to or equal to the resonant frequency of the atomization plate, and the frequency of the reference signal can control the power of the atomization plate. The type of the reference signal is not unique, in this embodiment, the reference signal is a PWM (Pulse width modulation) square wave signal, and the source of the reference signal is also not unique, for example, the nebulizer driving device may further include an MCU (micro controller Unit) chip, the amplitude adjusting circuit 110 may be connected to the MCU chip, and the MCU chip transmits the reference signal to the amplitude adjusting circuit 110. It is understood that in other embodiments, the type, frequency, source, etc. of the reference signal may be selected according to actual requirements, as long as the implementation is considered by those skilled in the art.

The amplitude adjusting circuit 110 is used for receiving a reference signal, the amplitude adjusting circuit 110 is connected with the filter circuit 120, and the filter circuit 120 is connected with a first input end of the comparator U8-A. Taking the reference signal as a PWM square wave signal with amplitude a as an example, after the reference signal passes through the amplitude adjusting circuit 110, the amplitude becomes a1, the specific value of a1 depends on the specific structure of the amplitude adjusting circuit 110, and a1 also affects the power of the atomizer. The amplitude adjustment circuit 110 is not unique in structure, and may include a resistor, for example, to change the amplitude of the reference signal by the voltage division of the resistor, so as to facilitate subsequent processing. It is understood that the amplitude adjustment circuit 110 may include other structures, and may be adjusted according to actual situations.

The amplitude-adjusted reference signal is transmitted to the filter circuit 120, and the filter circuit 120 filters the amplitude-adjusted reference signal. Taking the reference signal as the PWM square wave signal as an example, the reference signal will become an approximately horizontal linear voltage signal with amplitude a1 after passing through the filter circuit 120, the approximately horizontal linear voltage signal is transmitted to the first input terminal of the comparator U8-a, the first input terminal of the comparator U8-a is the reference input terminal, the signal received by the reference input terminal is used as the reference point, the comparator U8-a will compare the signal received by the second input terminal with the signal received by the reference input terminal, and output a high level or a low level according to the magnitude relationship between the two signals.

One end of the inductor L2 is connected to a power supply, the other end of the inductor L2 is used for being connected with a first lead of the atomizer, the voltage detection circuit 140 is used for being connected with a second lead of the atomizer, and the voltage detection circuit 140 is connected with a second input end of the comparator U8-A. It can be understood that the power supply connected to the inductor L2 is a reference power supply, and the voltage value of the reference power supply is generally fixed. Inductor L2 one end is connected the power, and the first lead wire of atomizer is connected to the other end, and inductor L2 and atomizer can constitute LC resonance circuit. The voltage detection circuit 140 is connected to the second lead of the atomizer on one side and the second input terminal of the comparator U8-A on the other side, and can detect the voltage of the atomizer and feed the detected voltage value back to the second input terminal of the comparator U8-A. It can be known from the function of the comparator U8-a that the voltage at the first input terminal and the voltage at the second input terminal of the comparator U8-a are always in a dynamic comparison process, which is a dynamic balancing process, so that the output terminal of the comparator U8-a outputs a square wave with a certain frequency to control the switch tube 130. So that the voltage at the first input of the comparator U8-a is continuously maintained at approximately the voltage at the second input. The comparator U8-A outputs a high level when the voltage at the first input terminal of the comparator U8-A is higher than the voltage at the second input terminal of the comparator U8-A, and outputs a low level when the voltage at the first input terminal of the comparator U8-A is lower than the voltage at the second input terminal of the comparator U8-A, wherein the output high and low levels are a square wave for controlling the switch tube 130, and the square wave can adjust the resonant power.

The output end of the comparator U8-A is connected to the control end of the switching tube 130, the first end of the switching tube 130 is connected to the end of the inductor L2 away from the power supply, and the second end of the switching tube 130 is connected to the voltage detection circuit 140. Through the comparison and analysis, the comparator U8-A can continuously output a frequency square wave similar to the frequency of the reference signal to control the on/off of the MOS tube Q4 and the on/off of the switching tube 130, thereby controlling the resonance of the atomizer. The two ends of the comparator U8-A can be continuously compared in a certain range to enable the power to be constant, and the method is realized in a hardware mode and is simple and reliable.

In an embodiment, referring to fig. 2, the amplitude adjusting circuit 110 includes a first resistor R5 and a second resistor R6, one end of the first resistor R5 is used for receiving a reference signal, the other end of the first resistor R3526 is connected to the second resistor R6, a common end of the first resistor R5 and the second resistor R6 is connected to the filter circuit 120, and an end of the second resistor R6 away from the first resistor R5 is grounded.

Specifically, taking the PWM square wave signal with the reference signal as the amplitude a as an example, after the voltage division by the first resistor R5 and the second resistor R6, the reference signal becomes the square wave signal with the amplitude AR5/(R5+ R6). The ratio of the resistances of the first resistor R5 and the second resistor R6 determines the power level of the nebulizer. The degree of adjusting the amplitude of the reference signal can be controlled by setting different resistance values of the first resistor R5 and the second resistor R6, and the use is convenient. And the amplitude adjusting circuit 110 using two resistors has a simple structure and is easy to implement.

In one embodiment, referring to fig. 2, the filter circuit 120 includes a first capacitor C6, a common terminal of a first resistor R5 and a second resistor R6 is connected to a first terminal of the first capacitor C6, and a second terminal of the first capacitor C6 is grounded. The first capacitor C6 is used as the filter circuit 120, so that the hardware cost can be saved, and the use is convenient. Taking the PWM square-wave signal with the reference signal as the amplitude a as an example, after the voltage division by the first resistor R5 and the second resistor R6, the reference signal becomes a square-wave signal with the amplitude AR5/(R5+ R6). After the square wave signal with the amplitude AR5/(R5+ R6) enters the first capacitor C6, the square wave signal becomes an approximately horizontal linear voltage signal with the amplitude AR5/(R5+ R6), and the approximately horizontal linear voltage signal is transmitted to the first input end of the comparator U8-A and serves as a reference point signal of the comparator U8-A. It is understood that in other embodiments, the filter circuit 120 may have other structures, as long as the implementation is considered by those skilled in the art.

In one embodiment, referring to fig. 2, the voltage detection circuit 140 includes a current conversion unit 141 and a filter unit 142, the filter unit 142 is connected to the second input terminal of the comparator U8-a and is further connected to the current conversion unit 141, and a common terminal of the current conversion unit 141 and the filter unit 142 is connected to the second terminal of the switch tube 130 and is further used for connecting to the second lead of the nebulizer.

Specifically, the common terminal of the current converting unit 141 and the filtering unit 142 is connected to the second lead of the atomizer, the resonant current on the atomizer is converted into a voltage signal through the current converting unit 141, the voltage signal is converted into an almost horizontal linear voltage signal through the filtering unit 142, and the product of the voltage value and the value of the reference power source connected to the inductor L2 is the power of the resonant atomizer. Since the value of the reference power source is generally fixed, the voltage value detected through the current converting unit 141 and the filtering unit 142 may directly reflect the power of the atomizer. The structure of the current converting unit 141 is not exclusive as long as it can convert the current signal into the voltage signal, and for example, resistors, the number of resistors, the connection relationship, and the like can be selected according to actual requirements. The structure of the filtering unit 142 is not unique, and may include, for example, capacitors, and the number and connection relationship of the capacitors may be selected according to actual requirements, as long as the implementation is considered by those skilled in the art.

In one embodiment, referring to fig. 2, the current converting unit 141 includes a third resistor R14, a common terminal of the filtering unit 142 and the second terminal of the switching tube 130 is connected to a first terminal of the third resistor R14, the first terminal of the third resistor R14 is further used for connecting the second lead of the atomizer, and the second terminal of the third resistor R14 is grounded. After the resonant current of the atomizer flows through the third resistor R14, a voltage drop is generated on the third resistor R14, so that the received current signal can be converted into a voltage signal, and the voltage signal is transmitted to the filtering unit 142 and further processed by the filtering unit 142. The third resistor R14 used as the current conversion unit 141 has a simple structure and is convenient to use.

In an embodiment, referring to fig. 2, the filtering unit 142 includes a fourth resistor R16, a second capacitor C13, and a third capacitor C7, a first end of the fourth resistor R16 is connected to a first end of the third resistor R14, a common end of the second capacitor C13 and the third capacitor C7 is connected to a second end of the third resistor R14, an end of the second capacitor C13 away from the third capacitor C7 is grounded, and an end of the third capacitor C7 away from the second capacitor C13 is grounded.

After the resonant current of the atomizer is converted into a voltage signal through the third resistor R14, the voltage signal is converted into a voltage signal which is approximately a horizontal straight line through the filtering action of the fourth resistor R16, the second capacitor C13 and the third capacitor C7, and the voltage value at the third capacitor C7 can directly reflect the power of the atomizing plate. The resistance of the fourth resistor R16, the capacitance of the second capacitor C13 and the capacitance of the third capacitor C7 can be set according to actual requirements. It is understood that in other embodiments, the filtering unit 142 may have other structures as long as the implementation is considered by those skilled in the art.

In one embodiment, referring to fig. 2, the nebulizer driving device further includes a pull-up resistor R10, and the pull-up resistor R10 is connected to the comparator U8-a. Specifically, when the output terminal of the comparator U8-A is suspended, a pull-up resistor R10 can be connected as required during use. The pull-up resistor R10 can be used as a peripheral circuit of the comparator U8-A, and the pull-up resistor R10 is also connected with a power supply. The high level voltage output by the comparator U8-A is the VCC value accessed by the pull-up resistor R10, and the low level voltage is equal to ground (0V). The appropriate pull-up voltage VCC may be selected based on the high voltage range output by comparator U8-a, pulling the output up to 5V if 5V is required, and the low voltage level is determined by the ground of comparator U8-a.

In one embodiment, referring to fig. 2, the nebulizer driving device further includes an anti-interference resistor R12, wherein one end of the anti-interference resistor R12 is connected to the control end of the switching tube 130, and the other end is connected to the second end of the switching tube 130. The interference resistance R12 is disposed between the control terminal and the second terminal of the switching tube 130, and can play a role of interference prevention. The resistance of the interference rejection resistor R12 may be selected according to actual requirements, and is not limited herein.

In one embodiment, referring to fig. 2, the switch transistor 130 is a MOS transistor Q4. Further, the switch tube 130 may be an N-channel MOS tube, a gate of the N-channel MOS tube is connected to the output end of the comparator U8-a, a source of the N-channel MOS tube is connected to the voltage detection circuit 140, and a drain of the N-channel MOS tube is connected to the inductor L2. When the switching tube 130 is the MOS transistor Q4, the MOS transistor Q4 is turned on or off based on the gate voltage adjustment, and the MOS transistor Q4 is fast in switching speed and good in working performance as the switching tube 130.

For a better understanding of the above embodiments, the following detailed description is given in conjunction with a specific embodiment. In one embodiment, referring to fig. 1-2, the nebulizer driving apparatus includes an amplitude adjusting circuit 110, a filter circuit 120, a comparator U8-a, a voltage detecting circuit 140, a switch tube 130, an inductor L2, a pull-up resistor R10, an interference-free resistor R12, and an MCU chip, where the amplitude adjusting circuit 110 includes a first resistor R5 and a second resistor R6, the filter circuit 120 includes a first capacitor C6, the voltage detecting circuit 140 includes a current converting unit 141 and a filter unit 142, the current converting unit 141 includes a third resistor R14, and the filter unit 142 includes a fourth resistor R16, a second capacitor C13, and a third capacitor C7.

Specifically, the reference signal is a PWM signal from the MCU chip. The PWM is a square wave with a certain frequency, the resonance frequency of the square wave is closer to that of the atomization plate, the main purpose is to control the power of the atomization plate, and the larger the duty ratio is, the larger the power is. The power is determined by the ratio of the resistance values of R5 and R6, the power is continuously compared with the sampling voltage of a C7 capacitor, after comparison, a square wave is output to control the MOS tube Q4 to enable the atomization plate to resonate, and the power is constant due to the fact that the two ends of the comparator U8-A are continuously compared within a certain range.

The PWM is a square wave with a certain frequency and amplitude assumed as a, and the divided voltage through R5 and R6 becomes a square wave with an amplitude of AR5/(R5+ R6), and after passing through the capacitor C6, becomes an approximately horizontal linear voltage signal with an amplitude of AR5/(R5+ R6). The resonant current is converted into a voltage signal which becomes an almost horizontal straight line after passing through a resistor R16 and capacitors C13 and C7 through a resistor R14, and the product of the voltage value and VDD is the power of the resonant atomization plate. VDD is fixed, so the voltage value of C7 can directly reflect the power of the atomizing plate, the function of the comparator U8-A can know that the voltage of C6 and the voltage of C7 are always in a dynamic comparison process, the process is a dynamic balance process, the output end of the comparator U8-A outputs square waves with certain frequency to control the MOS tube Q4, and the voltage of C7 is kept approximate to the voltage of C6 continuously. When the voltage of the C6 is higher than that of the C7, the comparator U8-A outputs a high level, and when the voltage of the C6 is lower than that of the C7, the comparator U8-A outputs a low level, and the output high level and the output low level are square waves for controlling the MOS transistor Q4, and the square waves can adjust the resonant power.

The square wave frequency of the PWM is consistent with the resonance frequency of the atomization plate, and through the comparison and analysis, the comparator U8-A can continuously output a frequency square wave similar to the PWM frequency to control the on-off of the MOS tube Q4, so as to control the resonance of the atomization plate. Inductor L2L2 constitutes LC resonant circuit with the atomizing piece, and R10 belongs to pull-up resistance R10 and belongs to comparator U8-A peripheral circuit, and R12 belongs to the resistance between MOS pipe Q4GS, jam-proof effect. The constant power is controlled in a hardware mode, the constant power is controlled in a mode of using the comparator U8-A and a mode of feeding back the comparator U8-A of a hardware circuit, so that the memory resource of a chip can be saved, and the implementation is simple and reliable.

The atomizer driving device comprises an amplitude adjusting circuit 110, a filter circuit 120, a comparator U8-A, a voltage detecting circuit 140, a switching tube 130 and an inductor L2, wherein the amplitude adjusting circuit 110 is used for accessing a reference signal, the reference signal is matched with the resonant frequency of the atomizer, after the amplitude adjusting circuit 110 accesses and adjusts the amplitude of the reference signal, the reference signal is changed into a stable signal through the filter circuit 120 and is transmitted to a first input end of the comparator U8-A, the voltage detecting circuit 140 detects the voltage of the atomizer and transmits the voltage to a second input end of the comparator U8-A, as the reference signal is matched with the resonant frequency of the atomizer, the inductor L2 and the atomizer form a resonant circuit, the comparator U8-A compares the signals of the two input ends, the comparator U8-A can output a square wave signal after comparison, the on-off of the switch tube 130 is controlled, the atomizer resonates, the two ends of the comparator U8-A can be continuously compared in size, power is constant within a certain range, different resonant frequencies are provided for different atomizing sheets, the atomizing effect is improved, the method is based on hardware implementation, simplicity and reliability are achieved, and the use reliability of the atomizer is improved.

In one embodiment, there is provided a nebulizer apparatus comprising a nebulizer and a nebulizer drive as described above.

The atomizer equipment comprises an amplitude adjusting circuit 110, a filter circuit 120, a comparator U8-A, a voltage detection circuit 140, a switching tube 130 and an inductor L2, wherein the amplitude adjusting circuit 110 is used for accessing a reference signal, the reference signal is matched with the resonant frequency of the atomizer, after the amplitude adjusting circuit 110 accesses and adjusts the amplitude of the reference signal, the reference signal is changed into a stable signal through the filter circuit 120 and is transmitted to a first input end of the comparator U8-A, the voltage detection circuit 140 detects the voltage of the atomizer and transmits the voltage to a second input end of the comparator U8-A, as the reference signal is matched with the resonant frequency of the atomizer, the inductor L2 and the atomizer form a resonant circuit, the comparator U8-A can continuously compare the signals of the two input ends, the comparator U8-A can output a square wave signal after comparison, the on-off of the switch tube 130 is controlled, the atomizer resonates, the two ends of the comparator U8-A can be continuously compared in size, power is constant within a certain range, different resonant frequencies are provided for different atomizing sheets, the atomizing effect is improved, the method is based on hardware implementation, simplicity and reliability are achieved, and the use reliability of the atomizer 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.

Claims

1. An atomizer driving device is characterized by comprising an amplitude adjusting circuit, a filter circuit, a comparator, a voltage detection circuit, a switching tube and an inductor, wherein the amplitude adjusting circuit is used for accessing a reference signal, and the reference signal is matched with the resonant frequency of an atomizer;

2. The driving device of the atomizer according to claim 1, wherein the amplitude adjustment circuit comprises a first resistor and a second resistor, the first resistor is connected to a reference signal at one end and to the second resistor at the other end, a common end of the first resistor and the second resistor is connected to the filter circuit, and an end of the second resistor away from the first resistor is grounded.

3. The nebulizer drive apparatus of claim 2, wherein the filter circuit comprises a first capacitor, a common terminal of the first resistor and the second resistor is connected to a first terminal of the first capacitor, and a second terminal of the first capacitor is connected to ground.

4. The driving device of the atomizer according to claim 1, wherein the voltage detection circuit comprises a current converting unit and a filter unit, the filter unit is connected to the second input terminal of the comparator and further connected to the current converting unit, and a common terminal of the current converting unit and the filter unit is connected to the second terminal of the switch tube and further connected to a second lead of the atomizer.

5. The driving device for the atomizer according to claim 4, wherein the current converting unit comprises a third resistor, a common end of the second ends of the switch tube and the filter unit is connected to a first end of the third resistor, the first end of the third resistor is further used for connecting to a second lead of the atomizer, and a second end of the third resistor is grounded.

6. The nebulizer driving device according to claim 5, wherein the filter unit comprises a fourth resistor, a second capacitor and a third capacitor, a first end of the fourth resistor is connected to a first end of the third resistor, a common end of the second capacitor and the third capacitor is connected to a second end of the third resistor, an end of the second capacitor far away from the third capacitor is grounded, and an end of the third capacitor far away from the second capacitor is grounded.

7. The nebulizer drive apparatus of claim 1, further comprising a pull-up resistor, the pull-up resistor being connected to the comparator.

8. The nebulizer drive apparatus of claim 1, further comprising an anti-jamming resistor, wherein one end of the anti-jamming resistor is connected to the control end of the switching tube, and the other end of the anti-jamming resistor is connected to the second end of the switching tube.

9. The nebulizer drive apparatus of claim 1, wherein the switching tube is a MOS tube.

10. A nebulizer apparatus comprising a nebulizer and a nebulizer drive apparatus according to any one of claims 1 to 9.