Electrolyzed water atomization sterilization control system

Abstract

The invention relates to the technical field of electrolyzed water atomization, and particularly discloses an electrolyzed water atomization sterilization control system which comprises an MCU control unit, a power module, an electrolysis module, an atomization module, a liquid level detection module, a fan module and a communication module. The MCU control unit is used for receiving and processing signals of all the modules and outputting control instructions to coordinate system work. The power supply module comprises a DC 12V linear step-down circuit used for supplying power to the electrolyzed water pole piece, a DC 12V-to-5V power supply chip used for supplying power to the MCU control unit, and a DCDC boost circuit used for supplying power to the atomization piece circuit. A 0.35 A constant current is provided for the electrolyzed water pole piece through the DC 12V linear step-down circuit, it is ensured that the electrolyzed water pole piece can stably work in water with any TDS concentration in combination with the AO3401A element and SENSE signal detection, the sterilization effect difference caused by current fluctuation is avoided, and the reliability of electrolytic sterilization is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of water electrolysis atomization technology, specifically to a water electrolysis atomization sterilization control system. Background Technology

[0002] With increasing emphasis on environmental hygiene and health protection, water electrolysis sterilization technology has been widely applied in medical, food, and household fields due to its advantages such as being green, environmentally friendly, and residue-free. Electrolysis of water with added salt produces a highly oxidizing substance (such as sodium hypochlorite) under the action of a specific current through electrolytic electrodes, effectively killing bacteria, viruses, and other microorganisms. Furthermore, atomizing the electrolyzed water expands the sterilization range and improves the efficiency of space disinfection, making water electrolysis atomization sterilization systems a hot research topic.

[0003] Existing water electrolysis atomization sterilization equipment suffers from several technical challenges: First, the working current stability of the electrolysis electrode is insufficient, and current fluctuations easily occur in water with different TDS concentrations, leading to unstable sterilization effects. Second, the power module design is unreasonable, with low conversion efficiency in circuits such as DC12V to 5V and DC12V to 24V boost, and a lack of reliable filtering and voltage regulation components, affecting the long-term stability of the system. Third, the oscillation circuit of the atomization module has limited driving capability, and the working frequency of the atomizing plate is easily affected by voltage fluctuations, resulting in unstable water mist generation. Fourth, the collaborative control logic of various modules in the system (such as electrolysis, atomization, fan, and liquid level detection) is simple, lacking intelligent status monitoring and abnormal handling mechanisms, which can easily lead to misoperation or shutdown in scenarios such as low liquid level or circuit failure, affecting the continuity of the sterilization process.

[0004] Furthermore, the interface design between the control unit and peripheral circuits of existing equipment is not standardized enough, signal transmission is susceptible to interference, and the lack of standardized communication interfaces makes it difficult to achieve efficient information exchange with the host, thus hindering the system's integration and intelligent upgrades. Therefore, there is an urgent need for an electrolytic water atomization sterilization system that can achieve stable power supply, precise control, and intelligent collaboration to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an electrolytic water atomization sterilization control system, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an electrolytic water atomization sterilization control system, comprising: an MCU control unit for receiving and processing signals from various modules and outputting control commands to coordinate system operation; a power supply module including a DC12V linear step-down circuit for powering the electrolytic water electrode, a DC12V to 5V power supply chip for powering the MCU control unit, and a DC-DC boost circuit for powering the atomizing plate circuit; an electrolysis module including an electrolytic water electrode connected to the DC12V linear step-down circuit, which performs an electrolysis reaction under the control of the MCU control unit; and an atomization module including a mist... The system includes an atomizing plate and an oscillation circuit. The oscillation circuit is connected to the MCU control unit to receive drive signals. The atomizing plate is connected to a DC-DC boost circuit to obtain the operating voltage, which is used to atomize the liquid into water mist. A liquid level detection module, using a Hall effect water level sensor circuit, is connected to the MCU control unit to detect liquid level information and feed it back to the MCU control unit. A fan module, including a DC fan and fan control circuit, is connected to the MCU control unit to deliver the water mist generated by the atomizing module to a designated area. A communication module, equipped with a module communication port for interaction with the host, is connected to the MCU control unit to realize information transmission between the system and the host.

[0007] Preferably, the MCU control unit uses an HC32L021C8PB chip, with pins PA5, PA6, PA7, PA8, PA9, PA10, PA11, PA13, PA14, PA15, and PA12 used to connect to peripheral circuits to achieve signal transmission and control with each module. The MCU control unit is also connected to a CJ8050 transistor Q7, with a resistor R43 around the transistor Q7 to enhance the driving capability of the MCU control unit.

[0008] Preferably, the DC12V linear step-down circuit is equipped with an AO3401A component, which provides a constant current of 0.35A to the water electrolysis electrode by detecting the SENSE signal, and can ensure that the water electrolysis electrode can work normally in water with any TDS concentration.

[0009] Preferably, the DC12V to 5V power supply chip is a WR1117AN / SOT-223 chip, which is equipped with a 10uF / 0805 / 16V / X7R C12 capacitor on its periphery; the power supply terminal of the MCU control unit is also connected to a 100nF C22 capacitor and a C23 capacitor, wherein the C22 capacitor is connected to GND and +5V, and the C23 capacitor is connected to GND and EN.

[0010] Preferably, the DC-DC boost circuit is used to boost the DC12V voltage to 24V. It is equipped with a 22uH, 6.06.05 specification, 2A inductor and an RS2M / SMA type diode D1. The circuit is also equipped with a 220pF / 1KV plug-in capacitor to stabilize the working state.

[0011] Preferably, the power module further includes an inductor assembly, including a 47uH, 5.05.05 specification, 1A L3010 inductor and a 10uH, 6.06.05 specification, 2A L1 inductor, which are used for energy storage and filtering of the power circuit, respectively.

[0012] Preferably, in the electrolysis module, the electrolytic water electrode is connected to a C43 capacitor with a specification of 2.2uF / 0805 / 25V / X7R, and the connection end of the electrolytic water electrode is marked with PIR4301, PIC4301, and PIC4302 interfaces to ensure a reliable connection with the linear step-down circuit.

[0013] Preferably, the oscillation circuit of the atomizing module includes a CJ8050 transistor Q1, a CJ8550 transistor Q3, a 4.7K resistor R5, and a WMO80N08TS / TO-252 MOSFET M1, which are used to receive the PWM waveform output by the MCU control unit and generate oscillation to drive the atomizing plate to work.

[0014] Preferably, the Hall level sensing circuit of the liquid level detection module is equipped with a 0.5R / 2010 resistor R37 and a 1K resistor R36, wherein the two ends of resistor R37 correspond to the PIC1701 and PIC1702 interfaces, and the two ends of resistor R36 correspond to the PIR3601 and PIR3602 interfaces, which are used for voltage division and sampling of circuit signals.

[0015] Preferably, the fan control circuit includes an SS58 / SMA type diode D2, whose input terminal is connected to a +24V power supply. The diode D2 is connected to the EN signal terminal output by the MCU control unit to realize the forward and reverse protection and switching control of the fan.

[0016] This invention provides an electrolytic water atomization sterilization control system, which has the following beneficial effects: 1. Improved stability of electrolytic sterilization: A DC12V linear step-down circuit provides a constant current of 0.35A to the electrolytic water electrode. Combined with the AO3401A component and SENSE signal detection, it ensures that the electrolytic water electrode can work stably in water with any TDS concentration, avoiding differences in sterilization effect caused by current fluctuations and significantly improving the reliability of electrolytic sterilization.

[0017] 2. Optimize power conversion efficiency and stability: The power module uses the WR1117AN / SOT-223 chip to convert DC12V to 5V, and is equipped with a 10uF / 0805 / 16V / X7R C12 capacitor. At the same time, 100nF capacitors such as C22 and C23 are used for filtering to reduce the impact of voltage ripple on the MCU control unit. The DC-DC boost circuit uses a 22uH inductor and RS2M / SMA diode to boost DC12V to 24V, and works with a 220pF / 1KV plug-in capacitor to stabilize the output, ensuring reliable power supply to the atomizer circuit and improving the overall power conversion efficiency and system anti-interference capability.

[0018] 3. Enhanced Synergy Between Atomization and Airflow: The atomization module drives the oscillation circuit through the PWM waveform output by the MCU, and uses CJ8050 and CJ8550 transistors and a 4.7K resistor to form a stable oscillation, ensuring uniform water mist generation from the atomizing plate; the fan control circuit achieves reliable control under 24V power supply through SS58 / SMA diodes, ensuring that the water mist can be accurately delivered to the designated area, improving the coverage efficiency of space disinfection.

[0019] 4. Intelligent monitoring and control: The system uses a Hall effect water level sensing circuit with an R37 resistor of 0.5R / 2010 specification for liquid level sampling. The MCU control unit can judge the liquid level status in real time and trigger the corresponding process (low liquid level alarm, high liquid level normal operation). It interacts with the host through the module communication port, supports adjustment of working parameters and feedback of abnormal information, and realizes program debugging by combining the JTAG interface, which significantly improves the intelligence and maintainability of the system.

[0020] 5. Enhanced System Integration and Expansion Capabilities: The MCU control unit adopts the HC32L021C8PB chip, which connects to peripheral circuits through pin specifications such as PA5-PA15, reducing signal interference; the standardized configuration of capacitor components (100nF / 0603 / 25V, 1uF / 0805 / 25V / X7R, etc.) and inductor components (47uH, 10uH) facilitates circuit integration and mass production, while providing a hardware foundation for subsequent functional expansion. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the principle of an electrolytic water atomization sterilization control system according to the present invention. Figure 2 This is a circuit diagram of the MCU control unit of the present invention; Figure 3 This is a circuit diagram of the DC12V linear step-down circuit of the present invention; Figure 4 This is a circuit diagram showing how the module's communication port communicates with the host in this invention. Figure 5The circuit diagram shows the DC12V to 5V power supply chip of this invention supplying power to the MCU. Figure 6 This is a circuit diagram of the Hall level sensing circuit of the present invention; Figure 7 This is a circuit diagram of the fan control circuit of the present invention; Figure 8 The circuit diagram shows the control circuit for the MCU to output a PWM waveform of a certain frequency according to the present invention. Figure 9 This is a circuit diagram of the DC-DC boost circuit of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figures 1-9 As shown, this invention provides a technical solution: an electrolytic water atomization sterilization control system, comprising: an MCU control unit, a power module, an electrolysis module, an atomization module, a liquid level detection module, a fan module, and a communication module; the MCU control unit is used to receive and process signals from each module and output control commands to coordinate system operation; the power module includes a DC12V linear step-down circuit for powering the electrolytic water electrode, a DC12V to 5V power supply chip for powering the MCU control unit, and a DC-DC boost circuit for powering the atomization circuit; the electrolysis module includes an electrolytic water electrode connected to the DC12V linear step-down circuit, and is controlled by the MCU control unit. The system performs an electrolytic reaction; the atomization module includes an atomizing plate and an oscillation circuit. The oscillation circuit is connected to the MCU control unit to receive drive signals, and the atomizing plate is connected to a DC-DC boost circuit to obtain the working voltage for atomizing the liquid into water mist; the liquid level detection module uses a Hall effect water level sensing circuit, which is connected to the MCU control unit to detect liquid level information and feed it back to the MCU control unit; the fan module includes a DC fan and a fan control circuit, which is connected to the MCU control unit to deliver the water mist generated by the atomization module to a designated area; the communication module has a module communication port for interaction with the host, which is connected to the MCU control unit to realize information transmission between the system and the host.

[0024] More specifically, the MCU control unit uses an HC32L021C8PB chip, with pins PA5, PA6, PA7, PA8, PA9, PA10, PA11, PA13, PA14, PA15, and PA12 used to connect to peripheral circuits to achieve signal transmission and control with each module. The MCU control unit is also connected to a CJ8050 transistor Q7, with a resistor R43 around the transistor Q7 to enhance the driving capability of the MCU control unit.

[0025] In this embodiment, the MCU control unit of the electrolyzed water atomization sterilization control system uses the HC32L021C8PB chip as the core control component of the system. It is responsible for receiving detection signals from each module, performing logical judgments, and outputting control commands to achieve precise control of the entire sterilization process.

[0026] The HC32L021C8PB chip's pins PA5, PA6, PA7, PA8, PA9, PA10, PA11, PA13, PA14, PA15, and PA12 are connected to various functional modules of the system, with the specific functions as follows: Pin PA5 serves as the key control signal output terminal, connected to the drive circuit of the electrolysis module, used to control the start / stop and duration adjustment of the electrolytic water electrode. Pins PA6 and PA7 are connected to the oscillation circuit of the atomization module, with PA6 outputting a PWM waveform signal and PA7 used to monitor the operating status feedback of the oscillation circuit. Pins PA8 and PA9 are connected to the Hall level sensing circuit of the liquid level detection module; PA8 receives the liquid level sampling signal, and PA9 is used to control the power supply to the detection circuit. Pin PA10 is connected to the EN signal terminal of the fan control circuit, controlling the start and stop of the DC fan through high and low level switching. Pins PA11 and PA12 serve as communication interfaces, connected to the module's communication port, enabling bidirectional data transmission with the host, including receiving working instructions and sending status information. Pins PA13, PA14, and PA15 are connected to the JTAG interface for program download, debugging, and online upgrades, ensuring flexible expansion of system functions.

[0027] To enhance the MCU control unit's ability to drive high-power peripheral devices (such as the oscillation circuit of the atomizing module and the fan control circuit), a drive enhancement circuit was added to the output of the HC32L021C8PB chip. The core of this circuit is a CJ8050 transistor Q7, whose base is connected to a specific control pin of the MCU through a resistor R43, and whose collector and emitter are connected to the power supply and control terminals of the controlled module, respectively. The resistance value of the resistor R43 is matched to ensure that the transistor Q7 operates in a saturated conduction state, amplifying the weak current signal output by the MCU into a strong drive current, meeting the high current drive requirements of devices such as the atomizing plate and DC fan. This design effectively avoids the overload problem of the output pin caused by the MCU directly driving high-power devices, and at the same time improves the reliability of control signal transmission.

[0028] The MCU control unit is powered by a DC12V to 5V power supply chip (WR1117AN / SOT-223). To ensure power supply stability, a 100nF C22 capacitor is connected between the chip's power supply pin and the +5V power supply, and a 100nF C23 capacitor is connected between the chip and GND, forming a π-type filter network to filter out high-frequency noise in the power supply. The chip's EN pin (enable terminal) is grounded through the C23 capacitor to ensure a stable enable signal and prevent the MCU from being accidentally reset due to voltage fluctuations.

[0029] More specifically, the DC12V linear step-down circuit is equipped with an AO3401A component, which provides a constant current of 0.35A to the water electrolysis electrode by detecting the SENSE signal, and can ensure that the water electrolysis electrode can work normally in water with any TDS concentration.

[0030] In this embodiment, the DC12V linear step-down circuit is a key circuit for powering the electrolyzed water electrode in the electrolyzed water atomization sterilization control system. Its core function is to provide a stable 0.35A constant current output to ensure that the electrolyzed water electrode can work reliably in water with different TDS concentrations.

[0031] This DC 12V linear buck converter uses the AO3401A as its core control device. As a low on-resistance P-channel MOSFET, the AO3401A possesses excellent current control characteristics, enabling precise response to control signals to regulate the output current. The circuit input is connected to the system's Vin12V power supply, and the linear regulation of the output current is achieved by switching the AO3401A between its on and off states.

[0032] To achieve constant current output control, the circuit design includes a SENSE signal detection stage. The SENSE signal is taken from both ends of the sampling resistor in the electrolytic water electrode circuit and can reflect the magnitude of the current flowing through the electrolytic water electrode in real time. This signal is fed back to the control terminal of the AO3401A, forming a closed-loop control: when the current flowing through the electrolytic water electrode deviates from the set value of 0.35A, the AO3401A will adjust its conduction level according to the change of the SENSE signal. If the current is too small, the conduction level will be increased to increase the current; if the current is too large, the conduction level will be decreased to reduce the current, thereby always stabilizing the output current at 0.35A.

[0033] Meanwhile, the circuit is also equipped with a 2.2uF / 0805 / 25V / X7R C43 capacitor, which is connected in parallel across the electrolytic water electrode to act as a filter. This capacitor can absorb the ripple current in the circuit and avoid the impact of current fluctuations on the working stability of the electrolytic water electrode, thus further ensuring the smooth operation of the electrolysis process in water with any TDS concentration.

[0034] Through the above design, the DC12V linear step-down circuit, with the precise control of the AO3401A component and the real-time feedback of the SENSE signal, achieves a constant current power supply of 0.35A to the electrolytic water electrode, effectively addressing the impact of TDS concentration changes in different water qualities, ensuring that the electrolytic water electrode is always in a stable working state, and providing a reliable guarantee for the sterilization effect of the system.

[0035] More specifically, the DC12V to 5V power supply chip uses the WR1117AN / SOT-223 chip, which is equipped with a 10uF / 0805 / 16V / X7R C12 capacitor on its periphery; the power supply terminal of the MCU control unit is also connected to a 100nF C22 capacitor and a C23 capacitor, wherein the C22 capacitor is connected to GND and +5V, and the C23 capacitor is connected to GND and EN.

[0036] In this embodiment, the DC12V to 5V power supply circuit serves as a key power supply unit of the system, providing a stable 5V operating voltage for the MCU control unit. Its core component is the WR1117AN / SOT-223 chip, which features low voltage drop and high stability, making it suitable for use as a regulated power supply in low-power embedded systems.

[0037] The pin configuration and peripheral circuit design of the WR1117AN / SOT-223 chip are as follows: The VIN pin of the chip is directly connected to the system's Vin12V power supply to receive a 12V DC input; the VOUT (TAB) pin is the 5V voltage output terminal, which is connected to the power supply terminal of the MCU control unit through copper foil. At the same time, a 10uF / 0805 / 16V / X7R C12 capacitor is connected in parallel between this pin and GND. This capacitor is a low-frequency filter capacitor, which is used to absorb the low-frequency ripple generated during power conversion and improve the smoothness of the output voltage; the ADJ (GND) pin is directly grounded, and the output voltage is kept stable at the nominal value of 5V through a fixed grounding method, without the need for an additional adjustable resistor network.

[0038] To further enhance the stability of the MCU control unit's power supply, high-frequency filter capacitors are added between its power supply terminal and related nodes: a 100nF C22 capacitor is connected to the +5V power supply at one end and to GND at the other end to filter out high-frequency noise on the 5V power supply line and prevent high-frequency interference from being coupled to the internal circuit of the MCU through the power supply; a 100nF C23 capacitor is connected to the EN signal terminal (enable control terminal) at one end and to GND at the other end. This capacitor can stabilize the level of the EN signal and prevent the EN signal from being falsely triggered due to external interference, ensuring the continuous and stable operation of the WR1117AN chip.

[0039] In the circuit design described above, the WR1117AN / SOT-223 chip, together with capacitors C12, C22, and C23, forms a collaborative filtering network. Through the combination of high and low frequency capacitors, the DC12V input voltage is stably converted to a 5V output, meeting the stringent requirements of the MCU control unit for power supply voltage accuracy (±2%) and ripple coefficient (≤10mV), thus providing a reliable power guarantee for the stable operation of the HC32L021C8PB chip.

[0040] More specifically, the DC-DC boost circuit is used to boost the DC12V voltage to 24V. It is equipped with a 22uH, 6.06.05 specification, 2A inductor and an RS2M / SMA type diode D1. The circuit is also equipped with a 220pF / 1KV plug-in capacitor to stabilize the working state.

[0041] In this embodiment, the DC-DC boost circuit is a key module in the electrolytic water atomization sterilization control system that provides the working voltage for the atomizing plate circuit. Its core function is to stably boost the DC12V input voltage of the system to 24V to meet the working voltage requirements of the atomizing plate. The input of this DC-DC boost circuit is connected to the system's Vin12V power supply, and the voltage is boosted through an internal switching mechanism. The circuit includes a 22uH, 6.0-6.05, 2A inductor, which acts as an energy storage element. It stores energy when the switching transistor is on and releases it when it is off, thus increasing the voltage in conjunction with the high-frequency switching action of the transistor. Its 2A rated current meets the current requirements of the atomizing circuit, while the 6.0-6.05 size is suitable for the overall circuit layout. Meanwhile, the circuit is equipped with an RS2M / SMA type diode D1, which is a fast recovery diode. Its anode is connected to the output terminal of the inductor, and its cathode is connected to the output terminal (+24V) of the boost circuit. It plays a freewheeling role when the switching transistor is turned off, preventing the reverse high voltage generated by the inductor from damaging other components in the circuit. The SMA package is beneficial to reduce the circuit size and improve the integration of the circuit. To further stabilize the operation of the boost circuit and ensure the stability of the 24V output voltage, a 220pF / 1KV plug-in capacitor is also included in the circuit. This capacitor is connected in parallel between the output terminal of the boost circuit and ground. On the one hand, it can absorb high-frequency interference signals in the circuit and filter out ripple in the output voltage. On the other hand, because it has a high withstand voltage of 1KV, it can effectively cope with the instantaneous high voltage that may occur during circuit switching, and avoid voltage fluctuations affecting the atomizing plate circuit. Through the above design, the DC-DC boost circuit can stably boost the DC12V voltage to 24V, providing a reliable operating voltage for the atomizing plate circuit. The 22uH inductor, RS2M / SMA diode D1, and 220pF / 1KV / plug-in capacitor work together to ensure the stability and reliability of the circuit during operation, ensuring that the atomizing plate can work normally to produce water mist.

[0042] More specifically, the power module also includes inductor components, including a 47uH, 5.05.05 specification, 1A L3010 inductor and a 10uH, 6.06.05 specification, 2A L1 inductor, which are used for energy storage and filtering in the power circuit, respectively.

[0043] In this embodiment, the power module serves as the core of the energy supply for the electrolytic water atomization sterilization control system. In addition to including a DC12V linear step-down circuit, a DC12V to 5V power chip, and a DC-DC boost circuit, it also has a dedicated inductor component to optimize the energy storage and filtering performance of the power circuit and ensure the stability of the power supply to each module.

[0044] This inductor assembly contains two key inductor components, whose specific parameters and functions are as follows: One is the L3010 inductor, with specifications of 47uH, 5.05.05, and 1A. This inductor is connected between the output of the DC12V linear step-down circuit and the electrolytic water electrode, mainly serving the functions of energy storage and low-frequency filtering. During the process of the DC12V linear step-down circuit providing a constant current of 0.35A to the electrolytic water electrode, the L3010 inductor can store energy using its inductive characteristics. When instantaneous current fluctuations occur in the circuit, it releases the stored energy to suppress current surges, ensuring a continuous and stable current flowing through the electrolytic water electrode. Simultaneously, its 47uH inductance effectively filters out low-frequency ripple in the circuit, preventing power supply noise from affecting the working state of the electrolytic water electrode. The 5.05.05 size is suitable for circuit layout requirements, and the 1A rated current meets the current carrying requirements of this branch.

[0045] The second component is the L1 inductor, with specifications of 10uH, 6.0-6.05mm, and 2A. This inductor is integrated into the internal energy conversion path of the DC-DC boost circuit, working in conjunction with components such as the switching transistor and diodes in the boost circuit, primarily serving the functions of high-frequency energy storage and filtering. During the process of the DC-DC boost circuit boosting DC12V to 24V, the L1 inductor rapidly stores energy when the switching transistor is on and releases energy when the switching transistor is off to maintain a stable output voltage. The 10uH inductance value matches the operating frequency of the boost circuit, enabling efficient energy conversion. Furthermore, its 6.0-6.05mm size design accommodates the layout space of the boost circuit, and the 2A rated current meets the peak current requirements of the atomizing plate circuit while effectively filtering out noise generated during high-frequency switching, ensuring a smooth and stable 24V output voltage.

[0046] Through the configuration of the aforementioned inductor components, the power module can achieve precise energy storage and filtering at different operating stages, providing stable and reliable power support for core components such as the electrolytic water electrode, atomizing plate, and MCU control unit, further improving the operational stability of the entire electrolytic water atomization sterilization control system.

[0047] More specifically, in the electrolysis module, the electrolytic water electrode is connected to a C43 capacitor with a specification of 2.2uF / 0805 / 25V / X7R, and the connection end of the electrolytic water electrode is marked with PIR4301, PIC4301, and PIC4302 interfaces to ensure a reliable connection with the linear step-down circuit.

[0048] In this embodiment, the electrolysis module is the core module of the electrolytic water atomization sterilization control system to realize the electrolytic sterilization function. It mainly consists of electrolytic water electrodes, C43 capacitors and corresponding connection structures. It works in conjunction with the DC12V linear step-down circuit to complete the electrolytic water generation process. The core component of the electrolysis module is the water electrolysis electrode, which is connected to a DC12V linear step-down circuit via a specific connection structure to obtain a stable constant current of 0.35A. To ensure the stability of the electrolysis process, a 2.2uF / 0805 / 25V / X7R C43 capacitor is connected in parallel at the connection terminal of the water electrolysis electrode. This capacitor uses X7R material, which has excellent temperature stability and capacitance accuracy, and can maintain stable performance within an operating temperature range of -55℃ to 125℃; the 0805 package size is suitable for the miniaturization layout requirements of the circuit, and the 25V withstand voltage meets the operating voltage requirements of the water electrolysis electrode. The main function of the C43 capacitor is to absorb the high-frequency ripple generated during the operation of the water electrolysis electrode, avoiding the impact of current fluctuations on the uniformity of the electrolysis reaction. At the same time, when there is a momentary disturbance in the output of the DC12V linear step-down circuit, it maintains the stability of the voltage across the electrode through the charging and discharging process, ensuring electrolysis efficiency. To ensure a reliable electrical connection between the water electrolysis electrode and the DC 12V linear buck circuit, the connection terminals of the water electrolysis electrode are labeled with PIR4301, PIC4301, and PIC4302. These interface labels correspond one-to-one with the corresponding interfaces on the output terminals of the linear buck circuit. PIR4301 is a current sampling interface used to feed back the current signal flowing through the water electrolysis electrode to the SENSE detection terminal of the linear buck circuit, forming a closed-loop constant current control. PIC4301 and PIC4302 are power interfaces, connecting to the positive output terminal and ground terminal of the linear buck circuit, respectively, ensuring the continuity of the power supply circuit. This standardized interface label design effectively avoids mis-insertion during connection, improving the accuracy and efficiency of module assembly, while ensuring low impedance characteristics of the current path and reducing energy loss. In actual operation, the electrolytic water electrode undergoes electrolysis under a constant current of 0.35A provided by the DC12V linear step-down circuit. The C43 capacitor suppresses current fluctuations in real time, while the PIR4301, PIC4301, and PIC4302 interfaces ensure stable current transmission and feedback. The three work together to enable the electrolysis module to continuously generate electrolyzed water with bactericidal effects in water with any TDS concentration.

[0049] More specifically, the oscillation circuit of the atomization module includes a CJ8050 transistor Q1, a CJ8550 transistor Q3, a 4.7K resistor R5, and a WMO80N08TS / TO-252 MOSFET M1, which are used to receive the PWM waveform output by the MCU control unit and generate oscillation to drive the atomizing plate to work.

[0050] In this embodiment, the oscillation circuit of the atomizing module is the core unit that drives the atomizing plate to work. It receives the PWM waveform signal output by the MCU control unit and forms a stable oscillation to drive the atomizing plate to generate water mist. The circuit mainly consists of a CJ8050 transistor Q1, a CJ8550 transistor Q3, a 4.7K resistor R5, and a WMO80N08TS / TO-252 MOSFET M1. The specific connection and working principle of the circuit are as follows: The synergistic effect of transistors Q1 and Q3: CJ8050 (Q1) is an NPN transistor, and CJ8550 (Q3) is a PNP transistor. Together, they form a complementary symmetrical amplifier circuit. The base of Q1 receives the PWM waveform output from the MCU through a coupling capacitor. Its emitter is connected to the emitter of Q3 and then to the oscillation circuit, while its collector is connected to the +24V power supply (provided by the DC-DC boost circuit). The collector of Q3 is grounded, and its base obtains a stable operating point through a bias circuit. When the PWM waveform is input, Q1 and Q3 conduct alternately, amplifying the weak signal into a strong signal sufficient to drive the oscillation circuit. The current limiting and biasing function of resistor R5: One end of the 4.7K resistor R5 is connected to the base of Q3, and the other end is grounded. Its main function is to provide a suitable base bias current for Q3 to ensure that the transistor works in the amplification region, while limiting the base current to prevent the component from being damaged. Switching control of MOSFET M1: The WMO80N08TS / TO-252 MOSFET M1 is an N-channel enhancement-mode MOSFET. Its gate is connected to the output terminals of Q1 and Q3, its drain is connected to one end of the atomizing plate, and its source is grounded. When the amplified PWM signal is input to the gate, M1 switches at high frequency with the signal, forming an LC oscillation with the inductor and capacitor components in the oscillation circuit, converting electrical energy into high-frequency mechanical vibration and transmitting it to the atomizing plate. The working process of the oscillation circuit is as follows: the PWM waveform output by the MCU control unit is first amplified by the amplifier circuit composed of Q1 and Q3. The amplified signal controls the conduction and cutoff of the MOS transistor M1. Under the switching action of M1, the oscillation circuit generates a high-frequency oscillation signal that matches the frequency of the PWM waveform, which finally drives the atomizing plate (oscillating plate) to vibrate and atomize the liquid into water mist. Through the coordinated design of the above components, the oscillation circuit can efficiently receive and convert the PWM signal output by the MCU to form a stable high-frequency oscillation, ensuring that the atomizing plate continuously produces uniform water mist under a 24V power supply, thus meeting the space disinfection requirements of the electrolytic water atomization sterilization system.

[0051] More specifically, the Hall level sensing circuit of the liquid level detection module is equipped with a 0.5R / 2010 resistor R37 and a 1K resistor R36. The two ends of resistor R37 correspond to the PIC1701 and PIC1702 interfaces, and the two ends of resistor R36 correspond to the PIR3601 and PIR3602 interfaces, which are used for voltage division and sampling of circuit signals.

[0052] In this embodiment, the Hall effect water level sensing circuit of the liquid level detection module is a key component for liquid level monitoring in the electrolytic water atomization sterilization control system. Through precise signal voltage division and sampling, it converts liquid level information into an electrical signal and transmits it to the MCU control unit, providing a basis for the safe and stable operation of the system. This circuit includes a 0.5R / 2010 resistor R37 and a 1K resistor R36, which work together to complete the signal processing function. Resistor R37 is designed with a low resistance of 0.5R and a 2010 package. Its two ends correspond to the PIC1701 and PIC1702 interfaces, respectively. The PIC1701 interface is connected to the output of the Hall sensor, and the PIC1702 interface is grounded, making R37 connected in series in the signal output circuit of the Hall sensor. Since the current signal output by the Hall sensor corresponds to the liquid level, when the liquid level changes, the current flowing through R37 changes. According to Ohm's law, a voltage drop proportional to the current will be generated across R37. This voltage signal is the original signal for liquid level sampling. The low resistance design effectively reduces energy loss during signal transmission, ensuring sampling accuracy. Resistor R36 is a 1K resistor, packaged to fit circuit layout requirements. Its two ends correspond to the PIR3601 and PIR3602 interfaces, respectively. The PIR3601 interface connects to the connection point between R37 and the PIC1701 interface, used to extract the voltage signal across R37. The PIR3602 interface connects to the signal input pin of the MCU control unit. R36 acts as a voltage divider and signal buffer, proportionally boosting the low-voltage signal generated by R37 to a voltage range recognizable by the MCU control unit (typically 0-3.3V), while preventing high current from directly inputting to the MCU pins and causing damage. In actual operation, the Hall effect water level sensing circuit detects changes in liquid level through the Hall effect, generating a corresponding current signal. This current signal is converted into a voltage signal by R37, then divided by R36 to form a stable sampling signal that is transmitted to the PA8 pin of the MCU control unit. The MCU control unit uses this signal to determine the current liquid level status and performs corresponding operations such as high-level operation or low-level alarm, ensuring timely response to abnormal liquid levels and improving the safety and reliability of the electrolytic water atomization sterilization control system.

[0053] More specifically, the fan control circuit includes an SS58 / SMA diode D2, whose input terminal is connected to a +24V power supply. The diode D2 is connected to the EN signal terminal output by the MCU control unit to realize the forward and reverse protection and switching control of the fan.

[0054] In this embodiment, the fan control circuit is a key module in the electrolytic water atomization sterilization control system for regulating the working state of the DC fan. Its core function is to receive instructions from the MCU control unit, realize precise switching control of the fan, and provide reliable forward and reverse protection. The core component of this circuit is the SS58 / SMA type diode D2. The hardware connection method for the fan control circuit is as follows: The circuit's input is directly connected to the +24V power supply output from the DC-DC boost circuit to provide operating voltage for the DC fan; The SS58 / SMA diode D2 uses an SMA package, which features small size and fast response. Its anode is connected to the +24V power input terminal, while the cathode is connected to the positive terminal of the DC fan through the control circuit. The negative terminal of the DC fan is connected to the EN signal output terminal of the MCU control unit through a switching element (such as a transistor), forming a complete control loop. Diode D2 plays two main roles in the circuit: Forward and reverse protection function: Since the SS58 diode is a unidirectional conductive element, when an unexpected reverse voltage occurs in the circuit (such as the power supply polarity being reversed or the reverse electromotive force generated by the inductor), D2 will be in the cut-off state, preventing reverse current from flowing through the fan and avoiding damage to the fan due to reverse voltage, thereby achieving electrical protection for the fan. The switching control works in tandem: When the MCU control unit outputs a high-level EN signal, the switching element is turned on, creating a +24V voltage difference across the fan (rectified by D2), and the fan starts working; when the EN signal is low, the switching element is turned off, the fan power supply circuit is disconnected, and the fan stops running. The presence of D2 ensures that the fan can only carry positive current during the switching process, further stabilizing the fan's operating state. Through the above design, the fan control circuit, with the help of the characteristics of the SS58 / SMA diode D2, not only achieves precise switching control of the DC fan (responding to the EN signal of the MCU), but also provides reliable forward and reverse electrical protection for the fan, ensuring that the fan can stably and safely blow the water mist generated by the atomization module into the designated area, thereby improving the collaborative working efficiency of the entire electrolytic water atomization sterilization control system.

[0055] The electrolytic water atomization sterilization control system also includes a capacitor assembly, which includes a 100nF / 0603 / 25V capacitor, a 1uF / 0805 / 25V / X7R C42 capacitor, 100nF C22 and C23 capacitors, and a 1uF C30 capacitor (the two ends of which are connected to the PIC3001 and PIC3002 interfaces respectively), used to realize the circuit filtering function.

[0056] A method for controlling the sterilization of water by electrolysis includes the following steps: System initialization: After the MCU control unit is powered on, it obtains a stable power supply through the DC12V to 5V power chip of the power module and performs initialization tests on each module, including the connection status of the electrolysis module, atomization module, liquid level detection module, fan module and communication module. After initialization is completed, a ready signal is sent to the host through the communication module. Receiving working instructions: The MCU control unit receives sterilization working instructions sent by the host through the communication module. The instructions include parameters such as sterilization duration and atomization intensity. Liquid level detection and judgment: The Hall level sensing circuit of the liquid level detection module detects the liquid level information in real time. After the signal is divided and sampled by resistors R37 and R36, it is transmitted to the MCU control unit. The MCU control unit determines the current liquid level status (high liquid level or low liquid level) according to the preset liquid level threshold.

[0057] High liquid level operation: If a high liquid level is detected, the MCU control unit performs the following operations: The DC12V linear step-down circuit of the control power module is started. Through the detection of the AO3401A component and the SENSE signal, a constant current of 0.35A is provided to the electrolytic water electrode of the electrolysis module to start the electrolysis operation. The working time of the electrolysis module is controlled according to the received sterilization duration parameter. The DC-DC boost circuit is activated to boost DC12V to 24V to power the atomizing module. At the same time, the MCU control unit outputs a PWM waveform of a specific frequency to the oscillation circuit, which forms an oscillation through transistors Q1, Q3 and MOSFET M1, driving the atomizing plate to produce water mist. The frequency of the PWM waveform is adjusted according to the atomization intensity parameter. The fan control circuit of the fan module starts the DC fan through the EN signal, blowing the water mist generated by the atomizing module into the designated area. The working status of the fan is synchronized with that of the atomizing module. During the operation of the electrolysis module, atomization module, and fan module, the MCU control unit monitors the working status of each module in real time through each pin. If an abnormality occurs, it sends an abnormal signal to the host through the communication module.

[0058] Low liquid level handling process: If the liquid level is determined to be low, the MCU control unit sends a low liquid level warning signal to the host through the communication module. At this time, the electrolysis module, atomization module and fan module will not start. If no liquid level recovery signal is received from the host within the preset time, the MCU control unit sends an error signal through the communication module and enters standby mode.

[0059] Work completed: When the electrolysis module reaches the set working time, the MCU control unit sequentially shuts down the electrolysis module, atomization module and fan module, controls the relevant circuits of the power supply module to enter a low power consumption state, and sends a work completion signal to the host through the communication module.

[0060] The MCU control unit performs a self-test on the program via the JTAG interface to ensure normal program operation. If a program abnormality is detected, a program fault signal is sent through the communication module. The detection frequency of the liquid level detection module can be adjusted by the MCU control unit according to the working stage; the detection frequency is increased when the electrolysis module is working and decreased when in standby mode. During the high liquid level operation, if the oscillation circuit of the atomization module oscillates abnormally, the MCU control unit attempts to repair it by adjusting the duty cycle of the PWM waveform. If multiple repairs fail, the atomization module is shut down and an abnormal signal is sent. The preset duration can be modified via commands sent from the host computer, and the MCU control unit stores the modified duration parameter in its internal storage unit.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrolytic water atomization sterilization control system, characterized in that, include: The MCU control unit is used to receive and process signals from various modules and output control commands to coordinate the operation of the system. The power supply module includes a DC12V linear step-down circuit for powering the water electrolysis electrode, a DC12V to 5V power supply chip for powering the MCU control unit, and a DC-DC boost circuit for powering the atomizing plate circuit. The electrolysis module includes water electrolysis electrodes connected to the DC12V linear step-down circuit, performing the electrolysis reaction under the control of the MCU control unit. The atomization module includes an atomizing plate and an oscillation circuit. The oscillation circuit is connected to the MCU control unit to receive drive signals, and the atomizing plate is connected to the DC-DC boost circuit to obtain the operating voltage for atomizing the liquid into water mist. The liquid level detection module uses a Hall effect water level sensor circuit connected to the MCU control unit to detect liquid level information and feed it back to the MCU control unit. The fan module includes a DC fan and a fan control circuit connected to the MCU control unit to deliver the water mist generated by the atomization module to a designated area. The communication module has a module communication port for interaction with the host computer, connected to the MCU control unit, enabling information transmission between the system and the host computer.

2. The electrolytic water atomization sterilization control system according to claim 1, characterized in that, The MCU control unit uses an HC32L021C8PB chip. Its pins PA5, PA6, PA7, PA8, PA9, PA10, PA11, PA13, PA14, PA15, and PA12 are used to connect to peripheral circuits to realize signal transmission and control with each module. The MCU control unit is also connected to a CJ8050 transistor Q7. A resistor R43 is provided around the transistor Q7 to enhance the driving capability of the MCU control unit.

3. The electrolytic water atomization sterilization control system according to claim 2, characterized in that, The DC12V linear step-down circuit is equipped with an AO3401A component, which provides a constant current of 0.35A to the water electrolysis electrode by detecting the SENSE signal, and can ensure that the water electrolysis electrode can work normally in water with any TDS concentration.

4. The electrolytic water atomization sterilization control system according to claim 3, characterized in that, The DC12V to 5V power supply chip uses the WR1117AN / SOT-223 chip, which is equipped with a 10uF / 0805 / 16V / X7R C12 capacitor on its periphery; the power supply terminal of the MCU control unit is also connected to a 100nF C22 capacitor and a C23 capacitor, wherein the C22 capacitor is connected to GND and +5V, and the C23 capacitor is connected to GND and EN.

5. The electrolytic water atomization sterilization control system according to claim 4, characterized in that, The DC-DC boost circuit is used to boost the DC12V voltage to 24V. It is equipped with a 22uH, 6.06.05 specification, 2A inductor and an RS2M / SMA type diode D1. The circuit also includes a 220pF / 1KV plug-in capacitor to stabilize the working state.

6. The electrolytic water atomization sterilization control system according to claim 5, characterized in that, The power module also includes inductor components, including a 47uH, 5.05.05 specification, 1A L3010 inductor and a 10uH, 6.06.05 specification, 2A L1 inductor, which are used for energy storage and filtering in the power circuit, respectively.

7. The electrolytic water atomization sterilization control system according to claim 6, characterized in that, In the electrolysis module, the electrolytic water electrode is connected to a C43 capacitor with a specification of 2.2uF / 0805 / 25V / X7R, and the connection end of the electrolytic water electrode is marked with PIR4301, PIC4301, and PIC4302 interfaces to ensure a reliable connection with the linear step-down circuit.

8. The electrolytic water atomization sterilization control system according to claim 7, characterized in that, The oscillation circuit of the atomization module includes a CJ8050 transistor Q1, a CJ8550 transistor Q3, a 4.7K resistor R5, and a WMO80N08TS / TO-252 MOSFET M1, which are used to receive the PWM waveform output by the MCU control unit and generate oscillation to drive the atomizing plate to work.

9. The electrolytic water atomization sterilization control system according to claim 8, characterized in that, The Hall level sensing circuit of the liquid level detection module is equipped with a 0.5R / 2010 resistor R37 and a 1K resistor R36. The two ends of resistor R37 correspond to the PIC1701 and PIC1702 interfaces, and the two ends of resistor R36 correspond to the PIR3601 and PIR3602 interfaces, which are used for voltage division and sampling of circuit signals.

10. The electrolytic water atomization sterilization control system according to claim 9, characterized in that, The fan control circuit includes an SS58 / SMA diode D2, whose input is connected to a +24V power supply. The diode D2 is connected to the EN signal output of the MCU control unit to realize the forward and reverse protection and on / off control of the fan.

Images