CN113991984A - Power regulation drive circuit and atomizer - Google Patents
Power regulation drive circuit and atomizer Download PDFInfo
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- CN113991984A CN113991984A CN202111119899.5A CN202111119899A CN113991984A CN 113991984 A CN113991984 A CN 113991984A CN 202111119899 A CN202111119899 A CN 202111119899A CN 113991984 A CN113991984 A CN 113991984A
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- 230000033228 biological regulation Effects 0.000 title claims abstract description 34
- 239000003990 capacitor Substances 0.000 claims abstract description 70
- 238000000889 atomisation Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims description 46
- 230000001105 regulatory effect Effects 0.000 claims description 44
- 230000003750 conditioning effect Effects 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 3
- 239000006199 nebulizer Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000764238 Isis Species 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
本发明提供一种功率调节驱动电路和雾化器，功率调节驱动电路包括电压调节电路和谐振驱动电路；电压调节电路的输入端连接电源，电压调节电路的调节端连接第一脉冲信号端；谐振驱动电路包括第二电容、第二电感以及第二脉冲信号开关模块，电压调节电路的输出端与第二电容的第一端以及第二电感的第一端连接，第二电容的第二端接地，第二电感的第二端与第二脉冲信号开关模块的第一端连接，第二脉冲信号开关模块的第二端接地，第二脉冲信号开关模块的控制端连接第二脉冲信号端，第二电感的第二端还通过负载接地；电压调节电路的调节端控制电压调节电路的输出端的接地导通。调节第一脉冲信号的占空比，实现对负载的功率的调节，能够使得雾化器的雾化功率得到调节，使得雾化治疗效果佳。
The invention provides a power adjustment drive circuit and an atomizer. The power adjustment drive circuit includes a voltage adjustment circuit and a resonance drive circuit; an input end of the voltage adjustment circuit is connected to a power supply, and an adjustment end of the voltage adjustment circuit is connected to a first pulse signal end; The drive circuit includes a second capacitor, a second inductor and a second pulse signal switch module, the output end of the voltage regulation circuit is connected to the first end of the second capacitor and the first end of the second inductor, and the second end of the second capacitor is grounded , the second end of the second inductor is connected to the first end of the second pulse signal switch module, the second end of the second pulse signal switch module is grounded, the control end of the second pulse signal switch module is connected to the second pulse signal end, the first The second end of the two inductors is also grounded through the load; the adjusting end of the voltage adjusting circuit controls the grounding conduction of the output end of the voltage adjusting circuit. The duty ratio of the first pulse signal is adjusted to realize the adjustment of the power of the load, so that the atomization power of the atomizer can be adjusted, so that the atomization treatment effect is good.
Description
Technical Field
The invention relates to the technical field of atomization control, in particular to a power regulation driving circuit and an atomizer.
Background
Along with the popularization of hand-held atomizer, at present most of patients in the market can select medical atomizer as the treatment tool for treating respiratory diseases, and the treatment effect is very obvious, because the atomizing piece generates ultrasonic waves to change liquid medicine into fine atomizing particles in the atomizing treatment, the atomizing effect is related to the power of the atomizing piece, strong young people may receive stronger atomizing treatment, because the one-time atomizing medicine is more, the inhaled medicine is natural and more, and the treatment effect is better, but some old people and infants may not receive more atomizing particles, can choke respiratory tract, and influence atomizing treatment on the contrary.
The atomization power of the existing atomizer is constant, and the atomization amount cannot be changed, so that the atomization therapeutic effect of the atomizers on the old and the infants is poor.
Disclosure of Invention
In view of the above, it is necessary to provide a power adjustment driving circuit and an atomizer.
A power regulating driver circuit comprising: a voltage regulation circuit and a resonant drive circuit;
the input end of the voltage regulating circuit is used for connecting a power supply, and the regulating end of the voltage regulating circuit is used for connecting a first pulse signal end;
the resonance driving circuit comprises a second capacitor, a second inductor and a second pulse signal switch module, wherein the output end of the voltage regulating circuit is respectively connected with the first end of the second capacitor and the first end of the second inductor, the second end of the second capacitor is used for grounding, the second end of the second inductor is connected with the first end of the second pulse signal switch module, the second end of the second pulse signal switch module is used for grounding, the control end of the second pulse signal switch module is used for connecting a second pulse signal end, and the second end of the second inductor is also used for grounding through a load; the output end of the voltage regulating circuit is also used for grounding, and the regulating end of the voltage regulating circuit is used for controlling the grounding conduction of the output end of the voltage regulating circuit.
In one embodiment, the voltage regulation circuit includes a power switch module and a first pulse signal switch module, a first end of the power switch module is used as an input end of the voltage regulation circuit to connect to the power supply, a second end of the power switch module is used as an output end of the voltage regulation circuit to connect to a first end of the second capacitor and a first end of the second inductor, respectively, the second end of the power switch module is further connected to the first end of the first pulse signal switch module, and a control end of the power switch module is used to connect to a switch signal end;
the second end of the first pulse signal switch module is used for grounding, and the control end of the first pulse signal switch module is used as the adjusting end of the voltage adjusting circuit to be connected with the first pulse signal end.
In one embodiment, the voltage regulation circuit further includes a first inductor, the second terminal of the power switch module is connected to the first terminal of the first inductor, the second terminal of the first inductor is connected to the first terminal of the first pulse signal switch module, and the second terminal of the first inductor is further configured to be connected to the first terminal of the second capacitor and the first terminal of the second inductor as the output terminal of the voltage regulation circuit.
In one embodiment, the control module further comprises a control module having the first pulse signal output terminal, the second pulse signal output terminal and the switch signal terminal.
In one embodiment, the resonant driving circuit further includes a first diode, an output terminal of the voltage regulating circuit is connected to an anode of the first diode, and a cathode of the first diode is connected to the first terminal of the second capacitor and the first terminal of the second inductor, respectively.
In one embodiment, the capacitor further comprises a voltage detection circuit, wherein the voltage detection circuit is connected with the second capacitor and is used for detecting the voltage of the second capacitor.
In one embodiment, the voltage detection circuit includes a first voltage-dividing resistor and a second voltage-dividing resistor, a first terminal of the first voltage-dividing resistor is connected to the output terminal of the voltage adjustment circuit, a second terminal of the first voltage-dividing resistor is connected to a first terminal of the second voltage-dividing resistor, a second terminal of the second voltage-dividing resistor is used for grounding, and a second terminal of the first voltage-dividing resistor is further used for connecting to a voltage detection terminal.
In one embodiment, the voltage detection circuit further includes a detection module having the voltage detection terminal, and the voltage detection terminal of the detection module is connected to the second terminal of the first voltage-dividing resistor.
In one embodiment, the load is an atomization sheet, the second end of the second inductor is connected with the first end of the atomization sheet, and the second end of the atomization sheet is used for grounding.
An atomizer comprising the power regulation driving circuit described in any of the above embodiments.
According to the power regulation driving circuit and the atomizer, when the first pulse signal input by the first pulse signal end runs at the preset duty ratio, the voltage of the second capacitor gradually rises, and when the voltage of the second capacitor is detected to reach the preset voltage, the frequency of the second pulse signal input by the second pulse signal end is gradually reduced from high to low, so that when the voltage of the second capacitor reaches the minimum value, the frequency of the second pulse signal at the moment is determined to be the resonant frequency of the load, at the moment, the load works at the maximum power, and the regulation of the power of the load can be realized by regulating the duty ratio of the first pulse signal. Through the process, the adjustment of the working frequency of the load is realized, the power of the load is adjusted, and when the power adjustment driving circuit is applied to the atomizer, the atomization power of the atomizer can be adjusted, so that the atomization power of the atomizer is applicable to the old and infants, and the atomization treatment effect is good.
Drawings
FIG. 1 is a schematic block circuit diagram of a power conditioning driver circuit in one embodiment;
fig. 2 is a circuit schematic diagram of a power conditioning drive circuit in another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. 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.
Example one
In this embodiment, as shown in fig. 1, there is provided a power conditioning driving circuit, including: a voltage regulation circuit and a resonant drive circuit; the input end of the voltage regulating circuit is used for connecting a power supply VCC, and the regulating end of the voltage regulating circuit is used for connecting a first pulse signal end PWM 1; the resonant driving circuit comprises a second capacitor C2, a second inductor L2 and a second pulse signal switching module, wherein an output end of the voltage regulating circuit is connected with a first end of the second capacitor C2 and a first end of the second inductor L2 respectively, a second end of the second capacitor C2 is used for grounding, a second end of the second inductor L2 is connected with a first end of the second pulse signal switching module, a second end of the second pulse signal switching module is used for grounding, a control end of the second pulse signal switching module is used for connecting a second pulse signal end PWM2, and a second end of the second inductor L2 is also used for grounding through a load; the output end of the voltage regulating circuit is also used for grounding, and the regulating end of the voltage regulating circuit is used for controlling the grounding conduction of the output end of the voltage regulating circuit.
It should be understood that the power adjusting driving circuit can be applied to various electric devices or electronic devices requiring adjustment of operating power, the load can be set to different types of loads according to the devices or electronic devices of the electronic devices, the load is equivalent to a capacitor in the circuit, and when the power adjusting driving circuit is applied to the atomizer, the load is the atomizing plate H1. In one embodiment, the power regulation driving circuit further includes the load, the load is a atomization sheet H1, the second end of the second inductor L2 is connected to the first end of the atomization sheet H1, and the second end of the atomization sheet H1 is used for grounding.
Specifically, the voltage regulating circuit is configured to regulate a voltage output from the power source VCC to the resonant driving circuit, the first pulse signal terminal PWM1 is configured to input a pulse signal to the regulating terminal, and control the connection or disconnection of the ground of the output terminal of the voltage regulating circuit, when the ground of the output terminal of the voltage regulating circuit is connected, the resonant driving circuit is short-circuited, and when the ground of the output terminal of the voltage regulating circuit is disconnected, the current of the output terminal of the voltage regulating circuit is output to the resonant driving circuit.
When the current of the output end of the voltage regulating circuit is output to the resonance driving circuit, the first pulse signal PWM1 input by the first pulse signal end PWM1 operates at a preset duty ratio, the voltage of the second capacitor C2 gradually increases, the voltage of the second capacitor C2 is regulated, namely the voltage of two ends of the atomizing plate H1 can be regulated, and when the voltage of the second capacitor C2 is detected to reach the preset voltage, the frequency of the second pulse signal PWM2 input by the second pulse signal end PWM2 is gradually reduced from high to low, so that when the voltage of the second capacitor C2 reaches the minimum value, the frequency of the second pulse signal PWM2 is determined to be the resonance frequency of the atomizing plate H1 at the moment. At this time, the atomization plate H1 works at the maximum power, and the power of the atomization plate H1 can be adjusted by adjusting the duty ratio of the first pulse signal PWM 1. Therefore, the adjustment of the working frequency of the atomization sheet H1 is realized, the power of the atomization sheet H1 is adjusted, and when the power adjustment driving circuit is applied to the atomizer, the atomization power of the atomizer can be adjusted, so that the atomization device is suitable for the old and infants, and the atomization treatment effect is good.
In one embodiment, the second pulse signal switch module comprises an electronic switch tube, and in one embodiment, the second pulse signal switch module comprises a transistor. In one embodiment, referring to fig. 1 and fig. 2, the second pulse signal switch module includes an NMOS (N-Metal-Oxide-Semiconductor) transistor Q3. The control terminal of the second pulse signal switch module is the gate of the NMOS transistor Q3.
In this embodiment, in order to reduce the atomization amount or the atomization power, it is necessary to reduce the voltage drop across the second capacitor C2, so that the first pulse signal PWM1 operates at a preset duty ratio, when the first pulse signal PWM1 is at a high level, the power VCC is grounded through the output terminal of the voltage regulating circuit, at this time, the output terminal of the voltage regulating circuit is not connected to the second capacitor C2, and at this time, the second capacitor C2 is not charged; when the first pulse signal PWM1 is at a low level, the ground of the output terminal of the voltage regulator circuit is not conducted, the second capacitor C2 is charged, the voltage of the second capacitor C2 gradually rises, and at this time, the voltage V across the second capacitor C2 is increasedC2VCC/(1-D), where D is the duty cycle of the first pulse signal PWM1, therefore, the voltage across the second capacitor C2 is subject to a large duty cycle control factor, and generally, VC2Greater than VCC, so the voltage V across the atomization sheet H1H1Accordingly, the power of atomizing plate H1 increases with the increase of the duty ratio of first pulse signal PWM1 due to the effect of the duty ratio of first pulse signal PWM1, and the duty ratio of first pulse signal PWM1 is controlled, so that the power of atomizing plate H1 can be adjusted, and the atomizing effect is better.
In order to adjust the voltage of the second capacitor C2 and adjust the voltage of the atomizing plate H1, in one embodiment, the voltage adjusting circuit includes a power switch module and a first pulse signal switch module, a first end of the power switch module is used as an input end of the voltage adjusting circuit to connect to the power VCC, a second end of the power switch module is used as an output end of the voltage adjusting circuit to connect to a first end of the second capacitor C2 and a first end of the second inductor L2, respectively, a second end of the power switch module is further connected to a first end of the first pulse signal switch module, and a control end of the power switch module is used to connect to a switch signal end IO-1; the second end of the first pulse signal switch module is used for grounding, and the control end of the first pulse signal switch module is used as the regulating end of the voltage regulating circuit to be connected with the first pulse signal end PWM 1.
In this embodiment, the power switch module is configured to control on/off of the power VCC, specifically, the switch signal terminal IO-1 inputs a turn-on signal or a turn-off signal to the control terminal of the power switch module, when the switch signal terminal IO-1 inputs a turn-on signal to the control terminal of the power switch module, the first terminal and the second terminal of the power switch module are turned on, and the power VCC is input to the second terminal of the power switch module; when the switch signal end IO-1 inputs a cut-off signal to the control end of the power switch module, the first end and the second end of the power switch module are cut off.
In one embodiment, the first pulse signal switch module comprises an electronic switch tube, and in one embodiment, the first pulse signal switch module comprises a transistor. In one embodiment, referring to fig. 1 and fig. 2, the first pulse signal switching module includes an NMOS transistor Q4. The control terminal of the first pulse signal switching module is the gate of the NMOS transistor Q4.
The first pulse signal terminal PWM1 inputs the first pulse signal PWM1 to the control terminal of the first pulse signal switch module, and inputs the on signal or the off signal to the control terminal of the first pulse signal switch module, for example, when the first pulse signal PWM1 is at a high level, the first terminal and the second terminal of the first pulse signal switch module are turned on, at this time, the second terminal of the power switch module is grounded through the first pulse signal switch module, when the first pulse signal PWM1 is at a low level, the first terminal and the second terminal of the first pulse signal switch module are turned off, at this time, the second terminal of the power switch module charges the second capacitor C2.
In one embodiment, as shown in fig. 2, the voltage regulating circuit further includes a first inductor L1, the second terminal of the power switch module is connected to the first terminal of the first inductor L1, the second terminal of the first inductor L1 is connected to the first terminal of the first pulse signal switch module, and the second terminal of the first inductor L1 is further configured to be connected as an output terminal of the voltage regulating circuit to the first terminal of the second capacitor C2 and the first terminal of the second inductor L2, respectively.
In this embodiment, the first inductor L1 is provided to increase the oscillation of the voltage output by the voltage regulator circuit, thereby increasing the voltage input to the resonant driving circuit.
In one embodiment, as shown in fig. 2, the resonant driving circuit further includes a first diode D1, an output terminal of the voltage regulating circuit is connected to an anode of the first diode D1, and a cathode of the first diode D1 is connected to the first terminal of the second capacitor C2 and the first terminal of the second inductor L2, respectively.
In this embodiment, the first diode D1 is disposed between the output terminal of the voltage regulator circuit and the second capacitor C2 and the second inductor L2, so that the current at the output terminal of the voltage regulator circuit is conducted in a single direction, and the output terminal of the voltage regulator circuit can continuously charge the second capacitor C2 and the second inductor L2.
In order to detect the voltage of the second capacitor C2, in an embodiment, as shown in fig. 2, the power regulation driving circuit further includes a voltage detection circuit connected to the second capacitor C2, and the voltage detection circuit is configured to detect the voltage of the second capacitor C2.
In this embodiment, the voltage detection circuit can detect the voltage of the second capacitor C2, so that when the voltage of the second capacitor C2 reaches a preset voltage, the second pulse signal PWM2 inputted from the second pulse signal terminal PWM2 to the control terminal of the second pulse signal switching module is controlled, and the frequency of the second pulse signal PWM2 is controlled to gradually decrease from high to low.
In order to detect the voltage of the second capacitor C2, in an embodiment, please refer to fig. 2 again, the voltage detection circuit includes a first voltage-dividing resistor R3 and a second voltage-dividing resistor R4, a first end of the first voltage-dividing resistor R3 is connected to the output terminal of the voltage regulation circuit, a second end of the first voltage-dividing resistor R3 is connected to a first end of the second voltage-dividing resistor R4, a second end of the second voltage-dividing resistor R4 is connected to ground, and a second end of the first voltage-dividing resistor R3 is further connected to a voltage detection terminal voltagetect.
In this embodiment, the first voltage-dividing resistor R3 and the second voltage-dividing resistor R4 are connected in parallel with the second capacitor C2, the sum of the voltage across the first voltage-dividing resistor R3 and the voltage across the second voltage-dividing resistor R4 is equal to the voltage across the second capacitor C2, and the voltage across the second voltage-dividing resistor R4 is detected by the voltage detection terminal voltagetect, because the resistance of the first voltage-dividing resistor R3 and the resistance of the second voltage-dividing resistor R4 are known, the voltage across the second capacitor C2 can be calculated by detecting the voltage across the second voltage-dividing resistor R4, and the voltage across the second capacitor C2 can be detected.
In order to realize the detection of the voltage of the second capacitor C2, in one embodiment, the voltage detection circuit further includes a detection module having the voltage detection terminal voltagedecet, and the voltage detection terminal voltagedecet of the detection module is connected to the second terminal of the first voltage-dividing resistor R3.
In this embodiment, the detection module may be implemented by a chip, the chip is a single chip, and the voltage detection terminal voltagedecet of the detection module is configured to detect the voltage of the second voltage-dividing resistor R4, so as to calculate the voltage of the second capacitor C2 according to the known resistance value of the first voltage-dividing resistor R3 and the known resistance value of the second voltage-dividing resistor R4.
In order to realize the control of the pulse signal according to the detection result of the voltage of the second capacitor C2, in one embodiment, the power regulation driving circuit further includes a control module having the first pulse signal PWM1 output terminal, the second pulse signal PWM2 output terminal, and the switching signal terminal IO-1.
In this embodiment, the chip that the control module can adopt is realized, this chip is the singlechip, this control module and detection module can be integrated in same chip, in this embodiment, this chip is the control detection chip, this control detection chip has voltage detection end voltagedecet, first pulse signal PWM1 output, second pulse signal PWM2 output and switching signal end IO-1, like this, this control detection chip can be according to the voltage of the second divider resistance R4 that voltage detection end voltagedecet detected, calculate the voltage that obtains second electric capacity C2, thereby control the pulse signal of first pulse signal PWM1 output, second pulse signal PWM2 output, in addition, can also pass through switching signal end IO-1 control switch module's switching on or cutting off.
In one embodiment, the power switch module includes a first electronic switch Q1 and a second electronic switch Q2, the switch signal terminal IO-1 is connected to the control terminal of the second electronic switch Q2 through a second resistor, the first terminal of the second electronic switch Q2 is used for grounding, the second terminal of the second electronic switch Q2 is connected to the control terminal of the first electronic switch Q1, the control terminal of the first electronic switch Q1 is further connected to the power source VCC through a first resistor, the first terminal of the first electronic switch Q1 is connected to the power source VCC, and the second terminal of the first electronic switch Q1 is connected to the first terminal of the first inductor L1.
In this embodiment, the first electronic switching tube Q1 is a PNP triode, the second electronic switching tube Q2 is an NPN triode, the switching signal terminal IO-1 is connected to the base of the second electronic switching tube Q2 through the second resistor R2, the emitter of the second electronic switching tube Q2 is used for grounding, the collector of the second electronic switching tube Q2 is connected to the base of the first electronic switching tube Q1, the base of the first electronic switching tube Q1 is further connected to the power source VCC through the first resistor R1, the emitter of the first electronic switching tube Q1 is connected to the power source VCC, and the collector of the first electronic switching tube Q1 is connected to the first end of the first inductor L1. When the switching signal terminal IO-1 inputs a high level, the first electronic switch Q1 and the second electronic switch Q2 are both turned on, and the first inductor L1 obtains a voltage of the power source VCC. When the switching signal terminal IO-1 inputs a low level, the first electronic switch Q1 and the second electronic switch Q2 are both turned off, and at this time, the power VCC cannot be conducted to the first inductor L1.
In this embodiment, the control terminal of the first pulse signal switch module is connected to the first pulse signal terminal PWM1 through a seventh resistor R7, and the second terminal of the first pulse signal switch module is grounded through a sixth resistor R6.
In one embodiment, as shown in fig. 2, the power regulation driving circuit further includes a current detection circuit, the second terminal of the first pulse signal switch module is further connected to the first terminal of an eighth resistor R8, the second terminal of the eighth resistor R8 is connected to the first terminal of a third capacitor C3, the second terminal of the third capacitor is connected to ground, the second terminal of the eighth resistor R8 is further connected to a power supply detection terminal current detection, and the power supply detection terminal current detection is used for detecting a current flowing to the ground of the second terminal of the first pulse signal switch module.
The following is a specific example:
characteristics of the circuit at resonance:
1. due to the total reactance X of the loop0＝(ω0L-1/ω0C) 0) so that the loop impedance Z0The minimum value is equivalent to a pure resistance circuit, and the voltage of the excitation source is in the same phase with the response current of the loop.
2. Due to inductive reactance omega0L and capacitive reactance 1/omega0C is equal, so the voltage U on the inductorLEqual in value to the voltage Uc across the capacitor, 180 ° out of phase, the ratio of the voltage across the inductor (or across the capacitor) to the excitation voltage is called the quality factor Q, i.e.:
under the condition that L and C are constant values, the Q value is only determined by the size of the loop resistor R.
3. The current I ═ Us/R in the circuit is at a maximum value with a constant value of the excitation voltage (effective value).
From the characteristics of the series resonant circuit, the driving power of the atomizing plate is closely related to the resonant frequency and the primary voltage Us, i.e. the output power can be adjusted by adjusting the frequency and UsSI.e. the voltage of the second capacitor, how Us is regulated to regulate the output power will be explained below in connection with the schematic circuit diagram of fig. 2:
in this embodiment, Us, which is a characteristic of the series resonant circuit, is a voltage of the second capacitor C2, and the voltage of the second capacitor C2 is adjusted by adjusting the voltage of the second capacitor C2.
When the IO-1 port of the detection control chip is at a high level, the Q1 and the Q2 triodes are both conducted, the inductor L1 obtains VCC voltage, when the PWM1 is at a low level, the VCC is conducted to the L1 through the Q1, the C2 is charged through the D1, and when the C2 is fully charged to the VCC voltage, namely V2 is full of the VCC voltageC2VCC, through R3 and R4 resistance voltage division can detect V through VOLTAGEETCECT pinC2Voltage ofThe PWM2 controls Q3 at the resonant frequency, so that atomization sheet H1 generates series resonance with the resonant frequency f, the power supply VCC voltage and inductor L2, and the atomization sheet sprays with the maximum power at the moment. It should be understood that here the series resonances are L2 and H1, and the resistance R is the equivalent resistance of L2 and H1.
When the PWM1 is at a low level, Q4 is turned off, the current does not flow to R6, when the PWM1 operates at a certain duty ratio, the voltage across C2 increases, when the voltage across C2 increases to a preset voltage, the PWM2 inputs a signal, where the voltage of C2 increases to a value not exceeding the rated withstand voltage of the capacitor of C2, for example, the rated withstand voltage of C2 is 50V, once the voltage reaches 50V, the PWM2 is turned on, the PWM2 gradually decreases the frequency from f1 to f2 from high to low, the voltage of C2 changes with the frequency change of the PWM2, when voltagdet detects a minimum value, the frequency f of the PWM2 is recorded, the frequency f is the resonant frequency of the atomizing plate H1, so the PWM2 operates at the frequency f, and the PWM2 controls Q3 at the resonant frequency. It should be understood that, when resonance occurs, the voltage of the atomizing plate is several times of the voltage of C2, and the ratio of the voltage of the atomizing plate to the voltage of C2 is the quality factor Q.
In order to reduce the atomization amount or atomization power, the voltage drop across the C2 needs to be reduced, the PWM1 is operated at a certain duty ratio, when the PWM1 is in a high level, VCC is conducted to the ground through Q1, L1, Q4 and R6, the C2 is not charged through D1 at the moment, when the PWM1 is in a low level, Q4 is closed, and C2 is charged through D1, the charging is a BOOST voltage process, therefore, the voltage VC2 across the C2 is VCC/(1-D), D is the PWM1 duty ratio, and V is the duty ratio of V1C2The voltage of (2) is controlled by a duty ratio, and is larger than a general voltage VC2Greater than VCC, so the voltage V across the atomizing plateH1The effect of the duty ratio is correspondingly larger, so that the atomization power and the atomization effect are increased along with the increase of the duty ratio.
From VH1＝Q*VC2，
The voltage V of the atomizing plate can be calculatedH1Where L is the inductance of the second inductor L2, C is the static capacitance of the atomization plate H1, and R isIs the equivalent resistance of the atomizing plate and the second inductor L2.
In one embodiment, there is provided a nebulizer comprising a power modulating driver circuit as described in any one of the above embodiments.
In this embodiment, the load connected in the power adjustment driving circuit is an atomization sheet, when the current at the output end of the voltage adjustment circuit is output to the resonance driving circuit, the first pulse signal input by the first pulse signal end operates at a preset duty ratio, the voltage of the second capacitor gradually increases, when it is detected that the voltage of the second capacitor reaches the preset voltage, the frequency of the second pulse signal input by the second pulse signal end gradually decreases from high to low, so that when the voltage of the second capacitor reaches a minimum value, it is determined that the frequency of the second pulse signal at this time is the resonance frequency of the atomization sheet, at this time, the atomization sheet operates at the maximum power, and the adjustment of the power of the atomization sheet can be realized by adjusting the duty ratio of the first pulse signal. Thereby realize the regulation to the operating frequency of atomizing piece for the power of atomizing piece obtains adjusting, when power regulation drive circuit is applied to the atomizer, can make the atomizing power of atomizer obtain adjusting, is applicable to old person and infant, makes the fog treatment effect good.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as 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 application, 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 concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A power conditioning driver circuit, comprising: a voltage regulation circuit and a resonant drive circuit;
the input end of the voltage regulating circuit is used for connecting a power supply, and the regulating end of the voltage regulating circuit is used for connecting a first pulse signal end;
the resonance driving circuit comprises a second capacitor, a second inductor and a second pulse signal switch module, wherein the output end of the voltage regulating circuit is respectively connected with the first end of the second capacitor and the first end of the second inductor, the second end of the second capacitor is used for grounding, the second end of the second inductor is connected with the first end of the second pulse signal switch module, the second end of the second pulse signal switch module is used for grounding, the control end of the second pulse signal switch module is used for connecting a second pulse signal end, and the second end of the second inductor is also used for grounding through a load; the output end of the voltage regulating circuit is also used for grounding, and the regulating end of the voltage regulating circuit is used for controlling the grounding conduction of the output end of the voltage regulating circuit.
2. The power regulation driving circuit of claim 1, wherein the voltage regulation circuit comprises a power switch module and a first pulse signal switch module, a first terminal of the power switch module is configured to be connected to the power supply as the input terminal of the voltage regulation circuit, a second terminal of the power switch module is configured to be connected to the first terminal of the second capacitor and the first terminal of the second inductor as the output terminal of the voltage regulation circuit, respectively, a second terminal of the power switch module is further connected to the first terminal of the first pulse signal switch module, and a control terminal of the power switch module is configured to be connected to a switch signal terminal;
the second end of the first pulse signal switch module is used for grounding, and the control end of the first pulse signal switch module is used as the adjusting end of the voltage adjusting circuit to be connected with the first pulse signal end.
3. The power regulation driver circuit of claim 2, wherein the voltage regulation circuit further comprises a first inductor, the second terminal of the power switch module is connected to the first terminal of the first inductor, the second terminal of the first inductor is connected to the first terminal of the first pulse signal switch module, and the second terminal of the first inductor is further configured to be connected as the output terminal of the voltage regulation circuit to the first terminal of the second capacitor and the first terminal of the second inductor, respectively.
4. The power conditioning driver circuit of claim 2, further comprising a control module having the first pulse signal output, the second pulse signal output, and the switching signal terminal.
5. The power regulation driver circuit of claim 1, wherein the resonant driver circuit further comprises a first diode, the output terminal of the voltage regulation circuit is connected to the anode of the first diode, and the cathode of the first diode is connected to the first terminal of the second capacitor and the first terminal of the second inductor, respectively.
6. The power conditioning driver circuit according to claim 1, further comprising a voltage detection circuit connected to the second capacitor, the voltage detection circuit configured to detect a voltage of the second capacitor.
7. The power regulation driving circuit of claim 6, wherein the voltage detection circuit comprises a first voltage-dividing resistor and a second voltage-dividing resistor, a first terminal of the first voltage-dividing resistor is connected to the output terminal of the voltage regulation circuit, a second terminal of the first voltage-dividing resistor is connected to a first terminal of the second voltage-dividing resistor, a second terminal of the second voltage-dividing resistor is connected to ground, and a second terminal of the first voltage-dividing resistor is further connected to a voltage detection terminal.
8. The power conditioning driver circuit according to claim 7, wherein the voltage detection circuit further comprises a detection module having the voltage detection terminal, the voltage detection terminal of the detection module being connected to the second terminal of the first voltage-dividing resistor.
9. The power regulation driving circuit according to any one of claims 1 to 8, further comprising the load, wherein the load is a atomization plate, the second end of the second inductor is connected to the first end of the atomization plate, and the second end of the atomization plate is used for grounding.
10. A nebulizer characterized by comprising the power adjustment drive circuit as claimed in any one of claims 1 to 9.
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| CN202111119899.5A CN113991984A (en) | 2021-09-24 | 2021-09-24 | Power regulation drive circuit and atomizer |
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| CN202111119899.5A CN113991984A (en) | 2021-09-24 | 2021-09-24 | Power regulation drive circuit and atomizer |
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| CN105049024A (en) * | 2015-08-06 | 2015-11-11 | 深圳市尚进电子科技有限公司 | High-precision frequency sweeping circuit and frequency sweeping method of ultrasonic atomization piece |
| CN207283855U (en) * | 2017-10-20 | 2018-04-27 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic heating control device and electromagnetic heating appliance |
| CN108580152A (en) * | 2018-06-13 | 2018-09-28 | 西安拓尔微电子有限责任公司 | A kind of determination method of atomizer transduction piece resonance point |
| CN108802529A (en) * | 2018-08-23 | 2018-11-13 | 西安拓尔微电子有限责任公司 | A kind of fast determination method of atomizer transduction piece resonance point |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105049024A (en) * | 2015-08-06 | 2015-11-11 | 深圳市尚进电子科技有限公司 | High-precision frequency sweeping circuit and frequency sweeping method of ultrasonic atomization piece |
| CN207283855U (en) * | 2017-10-20 | 2018-04-27 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic heating control device and electromagnetic heating appliance |
| CN108580152A (en) * | 2018-06-13 | 2018-09-28 | 西安拓尔微电子有限责任公司 | A kind of determination method of atomizer transduction piece resonance point |
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