CN106513233B - Micropore atomizer control circuit and power supply state indication method - Google Patents
Micropore atomizer control circuit and power supply state indication method Download PDFInfo
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- CN106513233B CN106513233B CN201611113734.6A CN201611113734A CN106513233B CN 106513233 B CN106513233 B CN 106513233B CN 201611113734 A CN201611113734 A CN 201611113734A CN 106513233 B CN106513233 B CN 106513233B
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- 238000001514 detection method Methods 0.000 claims abstract description 39
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- 238000012544 monitoring process Methods 0.000 claims abstract description 20
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
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Abstract
The invention discloses a control circuit of a microporous atomizer and a power supply state indicating method, wherein the control circuit comprises a microcontroller, a power supply and power supply signal detection module, a primary boosting module, a secondary boosting module, an atomization driving indication module and an atomization signal monitoring module, wherein the microcontroller is used as a control core, and the power supply and power supply signal detection module, the secondary boosting module, the atomization driving indication module and the atomization signal monitoring module are all connected to the microcontroller. The control circuit and the power supply state indicating method of the micropore atomizer can ensure the stability and consistency of the driving voltage in the working process of the micropore atomizer, so that the micropore atomizers under different power supply sources have the same driving voltage, and the micropore atomizer under the resonance state has the consistent spraying effect; meanwhile, the status is indicated through the atomizing sheet instead of the LED, so that the safety of a small-size and low-cost product and the monitoring performance of the working status are improved.
Description
Technical Field
The invention belongs to the technical field of atomizers, and particularly relates to a control circuit and a power supply indicating method of a micropore atomizer.
Background
The atomizer is applied to various fields of daily life of people, such as families, medical treatment, environmental protection and the like, wherein the atomizer for humidifying air, beautifying and supplementing water is commonly used in daily life of people.
In recent years, due to the improvement of living standard, beauty and health care electronic products such as face humidifiers, office pocket atomizers (such as common rose-shaped atomizers), bedroom aromatherapy machines, vehicle-mounted air humidifiers, bluetooth speaker atomizers and the like are favored by more and more consumers. The product has the micropore atomization function, and the micropore atomizer has the advantages of small volume, space saving, various shapes, low price, low power supply requirement and low power consumption. There are two modes of power supply for the microporous atomiser currently on the market: one uses USB interface to supply 5V power; an in-band battery and power management circuit.
In the two power supply modes, a three-pin inductor is adopted for boosting at present, for example, in patent application 201420065559.8, the circuit directly boosts through the inductor, and because the boosting ratio of the three-pin inductor is fixed, when the magnetic core parameters of the three-pin inductor are inconsistent or the input voltages are different, if 5V power is supplied, some are 4.8V and some are 5V, the voltages finally reaching the two ends of the atomizing sheet after passing through the three-pin inductor are different, so that the fog quantity of each atomizer is inconsistent; on the occasion of adopting the lithium battery to directly supply power, along with the increase of power consumption, the voltage of the battery is gradually reduced from full-charged 4.2V, so that the phenomenon of inconsistent spraying amount of the same atomizer when the atomizer works at a resonance point is caused. In some applications, the atomization amount of the liquid used for atomization by the user has strict requirements, and the market needs a new circuit to meet the consistency of the atomizing state of the microporous atomizer under different voltages.
Meanwhile, a power supply state indicating circuit is required to be frequently used. The indication circuit of the power supply state can comprise the state of VDD voltage, such as the voltage is pulled down; conditions that may include a fogging current, such as an overcurrent; including display of battery power, etc. In some products, there are limitations that the size of the mold is small, the IO pin of the chip is not enough to be used, and the cost is not increased to punch a hole on the surface of the mold or to perform thinning and light-transmitting treatment, so that the power supply state indicating circuit is often omitted in the process of designing the product circuit.
Disclosure of Invention
Based on this, the primary objective of the present invention is to provide a control circuit and a power supply status indication method for a micro-hole atomizer, which can also complete the indication of the power supply status without adding an LED indication circuit, adding too many chip pins of a chip, adding extra pins, or performing special treatment on the surface of a mold.
Another object of the present invention is to provide a control circuit and a power supply status indication method for a micro-pore atomizer, which have the features of small size and low cost while ensuring the safety of the product, and meanwhile, the monitoring capability of the working status will be greatly improved, and the user experience will also be optimized.
In order to realize the purpose, the technical scheme of the invention is as follows:
a micropore atomizer control circuit comprises a microcontroller, a power supply and power supply signal detection module, a primary boosting module, a secondary boosting module, an atomization driving indication module and an atomization signal monitoring module, wherein the microcontroller is used as a control core, the power supply and power supply signal detection module, the secondary boosting module, the atomization driving indication module and the atomization signal monitoring module are all connected with the microcontroller,
the microcontroller supports measurement of ADC signals and is responsible for charging management of the auxiliary battery, detection of voltage conditions of the power supply module, secondary boosting and atomization control and detection of atomization working state signals;
the power supply and power supply signal detection module is responsible for supplying power to the whole machine, providing a power supply state for the microcontroller, providing possibility for indication of the power supply state and feeding back external power supply voltage to the microcontroller;
the primary boosting module is connected to the power supply and power supply signal detection module and boosts the power supply voltage to 18-20V; the primary boosting module is connected with the secondary boosting module, and the primary boosting result is used as primary voltage of secondary boosting;
the secondary boosting module is connected with the primary boosting module and then performs secondary boosting on a primary boosting result and drives the atomizing sheet; the microcontroller is connected with the secondary boosting and provides a control signal for the secondary boosting;
when the atomization driving indication module is in a power supply state indication working process, the micropore atomization sheet sprays according to a certain rule to indicate a related power supply state; the atomization driving indication module is connected with the atomization signal detection module, provides a current or voltage signal for the atomization signal detection module, and is used for evaluating whether atomization driving is over-current and potential safety hazards exist;
the atomization signal monitoring module is used for feeding back an atomization state to the microcontroller; the atomization signal detection module is connected with the microcontroller, the working state of the atomizer is fed back to the microcontroller, and the microcontroller evaluates whether the atomization state is normal or not according to the signal.
Therefore, the control circuit ensures the stability and consistency of the driving voltage in the working process of the micropore atomizer, and the micropore atomizers under different power supplies (the common voltage range is 3.3V-5.5V) have the same driving voltage, so that the micropore atomizer under the resonance state has the consistent spraying effect.
The control circuit further comprises a switch signal module, and the switch signal module is connected to the microcontroller and used for outputting the selection of the working function of the whole machine.
The control circuit further comprises a battery charging management module, and the battery charging management module can be connected with an external power supply to charge the battery in a circuit with a power supply powered by the battery; the battery charging management module is connected with the microcontroller, so that the microcontroller can obtain relevant information in the charging process and can assist in battery charging control; the battery charging management is connected with the power supply and the power supply signal monitoring module, and when a charging signal is accessed, the battery can be charged and controlled.
The power supply and power supply signal detection module comprises a power supply module and a power supply signal detection module, wherein the power supply module supplies power to the microcontroller and the primary boosting module, and the power supply range is [3.3V,5.5V ] generally. If the circuit adopts an external USB for power supply, the power supply voltage is 5V; if the circuit adopts a lithium battery for power supply, the power supply voltage is 4.2V-3.3V. And meanwhile, the power supply signal detection module provides voltage information for the microcontroller, wherein the range of the voltage information belongs to [3mV, the power supply voltage of the microcontroller ], and the power supply signal detection module is used for judging whether the power supply voltage is in a normal range.
The primary boosting module continuously boosts the voltage provided by the power supply module in the power supply and power supply signal detection module to 18-20V and keeps constant voltage output. When the voltage output by the first-stage boosting module is determined, the first-stage boosting module continuously boosts the voltage to ensure constant voltage output, and if the output voltage is determined to be 19V, the first-stage boosting module continuously and automatically boosts the power supply voltage (e [3.3V,5.5V ]) to be stable 19V, no matter whether the USB power supply is 4.9V or 5.1V, no matter whether the battery power supply is 4.2V or 3.8V, and the like.
Specifically, when power is supplied through the USB, the USB is a signal input interface, the MC34063 is a power chip of a primary booster circuit, and the R1 and the R2 are boosting current-limiting resistors and are connected between the MC34063 and the USB which are the signal input interface; the collector of the Darlington tube in the MC34063 is connected with an input resistor R3, and is also connected with a primary boost inductor L1, and a primary boost rectifier diode D1 is connected behind the primary boost inductor L1 to prevent voltage backflow; the boosting feedback resistors R5 and R6 are connected to the MC34063 in parallel, wherein the R6 is connected with a feedback signal filter capacitor C10; c9 is a boost conversion frequency matching capacitor connected to MC34063, C4 is an input filter capacitor of a secondary boost circuit, connected between a primary boost rectifier diode D1 and a secondary voltage boost inductor L2, and used for smoothing the voltage output by the primary boost; a secondary voltage boosting module is formed by a secondary voltage boosting inductor L2 and a secondary voltage boosting switch NMOS Q1 to carry out secondary voltage boosting, R7 and R8 are connected with an NMOS Q1 and are bias resistors of an NMOS G pole, and a PWM (pulse-width modulation) port of the microcontroller is connected with R7 to provide a resonant switching signal (such as 110KHz) for the switch NMOS; the voltage after the secondary voltage boosting is provided for the microporous atomization sheet Y1 through the capacitors C6 and C13, and the atomization sheet starts to vibrate normally to start spraying.
Further, sampling resistance R9 is used for gathering the signal of micropore atomizer oscillation process for do the foundation that overflows, and R11, C13, R10, C12 carry out second order RC filtering with the signal that R9 gathered, and smooth to the signal, increase measuring stability and accuracy, the precision of guarantee atomizing signal monitoring, the IDET pin of signal connection microcontroller after the smoothness supplies the microcontroller to carry out the measurement of signal.
Further, the microcontroller MCU1 is connected to a power filter capacitor C11, the C11 is also a filter capacitor for USB signal sampling, and the microcontroller MCU1 can perform accurate measurement of the VDD signal by using an internal ADC for reverse measurement via VDD.
The microcontroller MCU1 is also connected with R12 and KEY, R12 and KEY are switch signal modules, the resistor R12 is used for resisting interference from a ground terminal, the KEY KEY provides a switch control signal to the microcontroller, and the microcontroller performs related control of atomization driving according to the signal.
Further, the capacitors C2 and C3 are signal filter capacitors connected to the signal input terminal for enhancing the stability of the input voltage and reducing the ripple.
Furthermore, the power supply end of the MC34063 chip is connected with C7 and C8 filter capacitors for removing burrs of input power supply signals.
A control circuit of a micropore atomizer and a power supply state indication method are disclosed, the method is characterized in that a microcontroller detects a switch signal, if the microcontroller detects a starting signal provided by a switch signal module and the power supply voltage is in a normal range, the microcontroller outputs the resonant frequency PWM of a micropore atomization sheet. The secondary boosting module starts boosting, the boosted voltage is supplied to the atomization driving circuit, and the micropore atomization sheet vibrates to start spraying. The atomization signal monitoring module starts to detect the signal of the atomization state, converts the signal into a reasonable voltage signal and provides the reasonable voltage signal for the microcontroller to identify.
Further, in the spraying process, if the microcontroller detects that the USB power supply (or battery) loading capacity is insufficient and is about to be lower than the threshold value, or the power supply abnormality is about to be higher than the threshold value, spraying is performed in a manner a 1: a1 sprays T1 time (such as 1s), stops T2 time (such as 2s), and repeats the cycle to prompt the user, if the user knows the abnormal condition and no longer receives the prompt in the work, a signal C1 is input from the switch signal module to inform the microcontroller, and the microcontroller returns to the normal spraying state after receiving the signal. If the atomization status signal is about to exceed a reasonable range, spraying is performed in a manner a 2: a2 sprays T3 time (e.g. 2s), stops T4 time (e.g. 1s), and repeats the cycle to prompt the user, if the user knows the abnormal condition and no longer receives the prompt in the work, a signal C1 is input from the switch signal module to inform the microcontroller, and the microcontroller returns to the normal spraying state after receiving the signal. If the atomization state signal or the power supply signal exceeds the threshold value, the shutdown treatment is directly carried out, and the atomization is stopped.
In a circuit powered by a battery, in a normal spraying state, a signal C2 is input from a switch signal module to inform a microcontroller, spraying is carried out in an operating mode A3, the spraying mode is carried out according to the battery power, spraying is carried out for n times within T5, n is confirmed according to the grade of the current battery voltage, if 4.2V-4.0V is the 5 th grade, n is 5, 4.0V-3.8V is the 4 th grade, n is 4, and the like. The microcontroller is informed of a signal C2 again from the switch signal module, and the normal spray condition is restored. Under the condition that no LED indicating circuit is arranged, the power supply state is indicated through diversified working modes of the atomizing sheet, the circuit can be effectively protected, meanwhile, a basis is provided for preventing the battery from being over-discharged and overcharged, and a user can clearly know the working condition of the whole machine.
The T1, T2 and T3 are defined by the user according to the actual situation of the user.
In the form of a battery-powered circuit, the circuit may be provided with a battery charge management circuit. When an external USB power supply is connected to charge the battery, the USB can simultaneously supply power to the microcontroller and the primary voltage boosting.
Preferably, the MOS for fog driving is NMOS with low turn-on voltage (Vth), wherein Vth is less than or equal to 3V.
Preferably, a 5V boosting module can be added to the circuit powered by the battery for outputting 5V, and the circuit can charge an external mobile phone or a 5V electric product.
The control circuit and the power supply state indicating method of the micropore atomizer can ensure the stability and consistency of the driving voltage in the working process of the micropore atomizer, so that the micropore atomizers under different power supplies (the voltage range is usually 3.3V-5.5V) have the same driving voltage, and the micropore atomizer under the resonance state has the consistent spraying effect; the power supply state indicating method can indicate the state through the atomizing sheet without an LED under the conditions that a chip control pin is in short supply, a die has limitation and the cost requirement is strict, so that the safety of a small-size and low-cost product and the monitorability of the working state are improved.
Drawings
FIG. 1 is a schematic diagram of the structure in which the present invention is practiced.
Fig. 2 is a circuit diagram of an implementation of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention 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 invention and are not intended to limit the invention.
As shown in fig. 1, the control circuit of the micropore atomizer provided by the invention comprises a microcontroller, a power supply and power supply signal detection module, a primary boost module, a secondary boost module, an atomization driving indication module and an atomization signal monitoring module, wherein the microcontroller is used as a control core, and the power supply and power supply signal detection module, the secondary boost module, the atomization driving indication module and the atomization signal monitoring module are all connected to the microcontroller.
The microcontroller supports measurement of ADC signals and is responsible for charging management of the auxiliary battery, detection of voltage conditions of the power supply module, secondary boosting and atomization control and detection of atomization working state signals.
And the power supply and power supply signal detection module is responsible for supplying power to the whole machine, providing a power supply state for the microcontroller, providing possibility for indication of the power supply state and feeding back external power supply voltage to the microcontroller.
The primary boosting module is connected to the power supply and power supply signal detection module and boosts the power supply voltage to 18-20V; the primary boosting module is connected with the secondary boosting module, and the result of primary boosting is used as primary voltage of secondary boosting.
The secondary boosting module is connected with the primary boosting module and then carries out secondary boosting on the primary boosting result and drives the atomizing sheet; the microcontroller is connected with the secondary boosting and provides a control signal for the secondary boosting.
When the atomization driving indication module is in a power supply state indication working process, the micropore atomization sheet sprays according to a certain rule to indicate a related power supply state; the atomization driving indication module is connected with the atomization signal detection module, provides a current or voltage signal for the atomization signal detection module, and is used for evaluating whether atomization driving is over-current or not and potential safety hazards exist.
The atomization signal monitoring module is used for feeding back an atomization state to the microcontroller; the atomization signal detection module is connected with the microcontroller, the working state of the atomizer is fed back to the microcontroller, and the microcontroller evaluates whether the atomization state is normal or not according to the signal.
Therefore, the control circuit ensures the stability and consistency of the driving voltage in the working process of the micropore atomizer, so that the micropore atomizers under different power supplies (the general voltage range is 3.3V-5.5V) have the same driving voltage, and the micropore atomizer under the resonance state has the consistent spraying effect.
The control circuit also comprises a switch signal module which is connected with the microcontroller and used for outputting the selection of the working function of the whole machine.
The control circuit also comprises a battery charging management module, and the battery charging management module can be connected with an external power supply to charge the battery in a circuit with a power supply powered by the battery; the battery charging management module is connected with the microcontroller, so that the microcontroller can obtain relevant information in the charging process and can assist in battery charging control; the battery charging management is connected with the power supply and the power supply signal monitoring module, and when a charging signal is accessed, the battery can be charged and controlled.
The power supply and power supply signal detection module comprises a power supply module and a power supply signal detection module, wherein the power supply module supplies power to the microcontroller and the primary boosting module, and the power supply range is [3.3V,5.5V ] generally. If the circuit adopts an external USB for power supply, the power supply voltage is 5V; if the circuit adopts a lithium battery for power supply, the power supply voltage is 4.2V-3.3V. And meanwhile, the power supply signal detection module provides voltage information for the microcontroller, wherein the range of the voltage information belongs to [3mV, the power supply voltage of the microcontroller ], and the power supply signal detection module is used for judging whether the power supply voltage is in a normal range.
The primary boosting module continuously boosts the voltage provided by the power supply module in the power supply and power supply signal detection module to 18-20V and keeps constant voltage output. When the voltage output by the first-stage boosting module is determined, the first-stage boosting module continuously boosts the voltage to ensure constant voltage output, and if the output voltage is determined to be 19V, the first-stage boosting module continuously and automatically boosts the power supply voltage (e [3.3V,5.5V ]) to be stable 19V, no matter whether the USB power supply is 4.9V or 5.1V, no matter whether the battery power supply is 4.2V or 3.8V, and the like.
The signal of the switch signal module can be generated in the form of a key or a hall switch. If the starting signal is detected, firstly judging whether the power supply voltage is in a normal range: if the battery is powered, when the voltage of the battery is lower than 3.3V, the atomization function is not started; if the power is supplied to the USB, when the USB power supply voltage is smaller than a set threshold value, such as 4.7V or 4.3V, or the USB power supply voltage exceeds the set threshold value, such as 5.5V, the atomization function is not started. And if the closing signal is detected, closing the atomization function.
Referring to fig. 2, taking a 110KHz USB powered Micro-pore atomizer circuit as an example, Micro-USB is a 5V USB signal input interface, and C2 and C3 are 5V USB signal filter capacitors, which are used to enhance the stability of input voltage and reduce ripple. MC34063 is a power supply chip of the one-stage booster circuit, R1 and R2 are boost current limiting resistors, and the relationship between the equivalent resistance (Rsc) and the current of the two is as follows:
c7 and C8 are filter capacitors of a power supply end of an MC34063 chip and are used for removing burrs of input power signals, R3 is an input resistor of a Darlington tube collector in the MC34063, L1 is a primary boosting inductor, D1 is a primary boosting rectifying diode and prevents voltage from flowing backwards, R5 and R6 are boosting feedback resistors, C10 is a feedback signal filter capacitor, primary boosting 20V is V1, and the relation among V1, R5 and R6 is as follows:
c9 is a boost conversion frequency matching capacitor, C4 is an input filter capacitor of a secondary boost circuit and is used for smoothing the voltage output by primary boost, L2 is a secondary voltage boost inductor, Q1 is a secondary boost switch NMOS, R7 and R8 are bias resistors of an NMOS G pole, and a PWM port of the microcontroller is connected with R7 to provide a 110KHz switching signal for the switch NMOS. The voltage after the second-stage boosting is provided for the microporous atomization sheet Y1 through the capacitors C6 and C13, and the atomization sheet starts to vibrate normally to start spraying. The sampling resistor R9 is used for collecting signals of the oscillation process of the micropore atomizer and used for making the basis of overcurrent, the R11, the C13, the R10 and the C12 perform second-order RC filtering on the signals collected from the R9, the signals are smoothed, the stability and the accuracy of measurement are improved, the monitoring accuracy of the atomization signals is guaranteed, and the smoothed signals are connected with an IDET pin of the microcontroller to be used for the microcontroller to measure the signals.
C11 is the power supply filter capacitor of microcontroller MCU1, is also the filter capacitor of USB 5V signal sampling simultaneously, and through VDD, microcontroller MCU1 can adopt the mode of inside ADC retest to carry out the accurate measurement of VDD signal. R12 and KEY are switch signal modules, a resistor R12 is used for resisting interference from a ground terminal, a KEY KEY provides a switch control signal to a microcontroller, and the microcontroller performs related control of atomization driving according to the signal.
The invention realizes a micropore atomizer control circuit and a power supply state indication method, which comprises the following steps:
firstly, a USB 5V signal is accessed into the circuit, the 5V signal supplies power to the MCU, and meanwhile, the signal is also used as input voltage boosted by the MC34063, the MC34063 starts boosting and continuously outputs 20V.
Then, the microcontroller detects a switch signal, when a KEY is pressed by a single click, atomization is started, a PWM pin outputs a 110KHz driving signal, the secondary booster circuit starts to work and provides a voltage signal which is greater than or equal to an atomization sheet driving voltage Vpp for the micropore atomization sheet, and the micropore atomization sheet starts to spray.
Secondly, in the spraying process, the microcontroller CSU8RP3115B measures a USB 5V signal through the internal reference voltage of the power supply pin in a reverse test mode, if the USB 5V voltage is smaller than 4.8V and larger than 4.5V, or the USB 5V voltage is larger than 5.2V and smaller than 5.4V, the microcontroller controls spraying for 2s and stops spraying for 1s, the user equipment is prompted to be in a critical state through controlling regular change of spraying, the user is prompted that the current USB 5V signal is unstable, if the user receives the prompt and wants the microcontroller to work normally, the KEY KEY is double-clicked, and after the microcontroller detects double-click, the microcontroller returns to a continuous spraying state.
And in the spraying process, if the microcontroller detects that the USB 5V signal is less than 4.5V or more than 5.4V or the atomization state signal Idet exceeds a limited threshold value, directly closing the spraying function to ensure the safety of the whole machine, and starting spraying again after detecting a switch signal next time, and circulating the steps.
The circuit and the method can ensure the stability of the driving voltage of the micropore atomizer under different battery voltages or different USB power supply states, and ensure that the atomization state of each micropore atomizer is more consistent; the indicating method based on the circuit form can indicate the power supply state of the atomizer under the condition of not increasing lamp control, effectively reduces the production cost and improves the working safety of the micropore atomizer, so that a user can find and restrain potential safety hazards existing in a circuit as soon as possible, the user can know the electric quantity of a battery in a non-indicating lamp mode for a product with the battery, and the function of the micropore atomizer with a small structure or special surface materials is increased.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A micropore atomizer control circuit is characterized in that the control circuit comprises a microcontroller, a power supply and power supply signal detection module, a primary boosting module, a secondary boosting module, an atomization driving indication module and an atomization signal monitoring module, wherein the microcontroller is used as a control core, the power supply and power supply signal detection module, the secondary boosting module, the atomization driving indication module and the atomization signal monitoring module are all connected with the microcontroller,
the microcontroller supports measurement of ADC signals and is responsible for charging management of the auxiliary battery, detection of voltage conditions of the power supply module, secondary boosting and atomization control and detection of atomization working state signals;
the power supply and power supply signal detection module is responsible for supplying power to the whole machine, providing a power supply state for the microcontroller, providing possibility for indication of the power supply state and feeding back external power supply voltage to the microcontroller;
the primary boosting module is connected to the power supply and the power supply signal detection module and boosts the power supply voltage; the primary boosting module is connected with the secondary boosting module, and the result of primary boosting is used as primary voltage of secondary boosting;
the secondary boosting module is connected with the primary boosting module and then performs secondary boosting on a primary boosting result and drives the atomizing sheet; the microcontroller is connected with the secondary boosting and provides a control signal for the secondary boosting;
when the atomization driving indication module is in a power supply state indication working process, the micropore atomization sheet sprays according to a certain rule to indicate a related power supply state; the atomization driving indication module is connected with the atomization signal detection module, provides a current or voltage signal for the atomization signal detection module, and is used for evaluating whether atomization driving is over-current and potential safety hazards exist;
the atomization signal monitoring module is used for feeding back an atomization state to the microcontroller; the atomization signal detection module is connected with the microcontroller, and feeds back the working state of the atomizer to the microcontroller, and the microcontroller evaluates whether the atomization state is normal or not according to the signal;
the control circuit further comprises a battery charging management module, and the battery charging management module can be connected with an external power supply to charge the battery in a circuit with a power supply powered by the battery; the battery charging management module is connected with the microcontroller, so that the microcontroller can obtain relevant information in the charging process and can assist in battery charging control; the battery charging management is connected with the power supply and the power supply signal monitoring module, and when a charging signal is accessed, the battery is charged and controlled;
when power is supplied by the USB, the USB is a signal input interface, the MC34063 is a power chip of a primary booster circuit, and the R1 and the R2 are boosting current-limiting resistors and are connected between the MC34063 and the USB which is the signal input interface; the collector of the Darlington tube in the MC34063 is connected with an input resistor R3, and is also connected with a primary boost inductor L1, and a primary boost rectifier diode D1 is connected behind the primary boost inductor L1 to prevent voltage backflow; the boosting feedback resistors R5 and R6 are connected with the MC34063 in parallel, wherein the R6 is connected with a feedback signal filter capacitor C10; c9 is a boost conversion frequency matching capacitor connected to MC34063, C4 is an input filter capacitor of a secondary boost circuit, connected between a primary boost rectifier diode D1 and a secondary voltage boost inductor L2, and used for smoothing the voltage output by the primary boost; a secondary voltage boosting module is formed by a secondary voltage boosting inductor L2 and a secondary voltage boosting switch NMOS Q1 for secondary voltage boosting, R7 and R8 are connected with an NMOS Q1 and are bias resistors of an NMOS G pole, and a PWM (pulse-width modulation) port of the microcontroller is connected with R7 to provide 110KHz switching signals for a switch NMOS; the voltage after the secondary voltage boosting is provided for the micropore atomization sheet Y1 through the capacitors C6 and C13, and the atomization sheet is normal.
2. The micropore atomizer control circuit of claim 1, wherein said control circuit further comprises a switch signal module, said switch signal module is connected to a microcontroller for outputting a selection of overall operating functions.
3. The control circuit of claim 1, wherein the sampling resistor R9 is used for collecting signals during oscillation of the micro-pore atomizer for use as a basis for overcurrent, and R11, C13, R10 and C12 perform second-order RC filtering on the signals collected by R9 to smooth the signals, and the smoothed signals are connected to an IDET pin of the microcontroller for measurement of the signals.
4. The control circuit of a microporous atomizer as claimed in claim 1, wherein the microcontroller MCU1 is connected to a power filter capacitor C11, C11 is also a filter capacitor for USB signal sampling, and the microcontroller MCU1 can perform accurate measurement of VDD signal by way of internal ADC reverse measurement through VDD; the microcontroller MCU1 is also connected with R12 and KEY, R12 and KEY are switch signal modules, the resistor R12 is used for resisting interference from a ground wire end, a KEY KEY provides a switch control signal to the microcontroller, and the microcontroller performs related control of atomization driving according to the signal; and the C2 and the C3 are signal filter capacitors and are connected to the signal input end for enhancing the stability of the input voltage and reducing ripples.
5. The method for indicating the power supply status of the control circuit of the micro-pore atomizer according to claim 1, wherein the microcontroller detects the switch signal, and if the microcontroller detects the turn-on signal provided by the switch signal module and the power supply voltage is in a normal range, the microcontroller outputs the resonant frequency PWM of the micro-pore atomizing sheet; the secondary boosting module starts boosting, the boosted voltage is supplied to the atomization driving circuit, and the micropore atomization sheet vibrates to start spraying; the atomization signal monitoring module starts to detect the signal of the atomization state, converts the signal into a reasonable voltage signal and provides the reasonable voltage signal for the microcontroller to identify.
6. The power status indication method according to claim 5, wherein during spraying, if the microcontroller detects that the power carrying capacity is lower than the threshold value or the power supply abnormality is higher than the threshold value, the spraying is performed according to the following formula A1: a1 spraying T1 time, stopping T2 time, repeating cycle to prompt user, if user knows abnormal condition and no longer receives the prompt, inputting a signal C1 from switch signal module to inform microcontroller, and microcontroller returns to normal spraying state after receiving the signal;
if the atomization status signal is about to exceed a reasonable range, spraying is performed in manner a 2: a2 spraying T3 time, stopping T4 time, repeating cycle to prompt user, if user knows abnormal condition and no longer receives the prompt, inputting a signal C1 from switch signal module to inform microcontroller, and microcontroller returns to normal spraying state after receiving the signal; if the atomization state signal or the power supply signal exceeds the threshold value, the shutdown treatment is directly carried out, and the atomization is stopped.
7. The power supply status indication method according to claim 6, wherein in the battery-powered circuit, in the normal spraying status, a signal C2 is inputted from the switch signal module to inform the microcontroller, and spraying is performed in an operation mode A3, wherein spraying is performed in a T5 time interval n times according to the battery power level, n is confirmed according to the current battery voltage level, and a signal C2 is inputted from the switch signal module again to inform the microcontroller, and the normal spraying status is recovered.
8. The power supply status indication method according to claim 5, wherein the MOS of the fog driving is implemented by using an NMOS having a low threshold voltage (Vth) which is less than or equal to 3V.
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