Electrolytic hydrogen peroxide oral waterway disinfection system

Abstract

The utility model discloses an electrolytic hydrogen peroxide oral cavity water route disinfection system, including electrolytic equipment, finished product groove, circulating tank, electrolyte jar, hydrogen peroxide groove and pure water tank, the electrolytic equipment is three room diaphragm electrolytic cell, three room diaphragm electrolytic cell is provided with anode chamber, cathode chamber and the intermediate room between anode chamber and cathode chamber, the utility model is immediate use, safe and efficient, accurate and adds, dynamic control, and the system passes through liquid level, flow sensing and program logic control, has realized from the liquid preparation, liquid supplement, electrolysis to the whole process automation of adding, has reduced the manual operation and maintenance cost greatly, and resource utilization is high, adopts three room electrolytic cell, and reaction efficiency is high, and the byproduct in electrolysis process has carried out reasonable utilization and circulation, and the system integration degree is high.

Description

Technical Field

[0001] This utility model relates to the field of medical disinfection devices, specifically an electrolytic hydrogen peroxide oral water disinfection system. Background Technology

[0002] The dental chair water system comes into direct contact with the patient's mouth during treatment, making water quality crucial for preventing cross-infection. However, the unique structure of the dental chair water system (long, narrow pipes, prolonged stagnation) makes it highly susceptible to bacterial growth and biofilm formation, leading to severely excessive levels of microorganisms in the treatment water and posing a potential medical risk. Therefore, continuous and effective disinfection of the dental chair water system is essential.

[0003] Currently, the water-based disinfection technologies commonly used in dental chairs on the market have the following limitations and challenges: 1. Regarding existing technologies, their effectiveness, immediate usability, and safety issues: Traditional disinfection methods often rely on externally purchased chemical disinfectants, such as chlorine-based disinfectants, peracetic acid, or pre-packaged hydrogen peroxide concentrate. These methods have inherent drawbacks: First, storage and transportation risks are high, especially since high-concentration hydrogen peroxide solutions are hazardous chemicals requiring stringent storage conditions and posing safety hazards such as leakage and decomposition. Second, the activity of the disinfectant cannot be guaranteed. There is a time lag between production and use, and the active ingredients naturally decay during storage, leading to unstable disinfection effects and making it impossible to ensure the use of consistently "fresh" disinfectants.

[0004] 2. How to accurately apply and stably control the flow rate: Existing dosing systems are mostly simple timed and quantitative dosing methods, which cannot be matched with the actual operating conditions of dental chairs. For example, during peak treatment periods, the water flow is high, and a fixed dosing rate may result in insufficient disinfectant dosage; while during off-peak periods, continuous dosing leads to waste of disinfectant and may corrode the pipe materials. This extensive dosing method makes it difficult to maintain a stable and effective disinfection concentration in the water system, resulting in inconsistent disinfection effects and poor economic efficiency.

[0005] 3. The operation is cumbersome and the safety of each step is uncontrollable: Many disinfection processes, especially those based on technologies such as sodium hypochlorite electrolysis, require significant manual intervention, such as preparing electrolyte solutions, replenishing salt tanks, and periodically cleaning electrodes. Low levels of automation not only increase the workload of medical staff but also introduce risks of secondary contamination and operational errors due to improper procedures. Furthermore, the various stages of the system, from electrolyte preparation and storage to dosing, are not well-coordinated, failing to form a complete, closed-loop automated solution.

[0006] In summary, there is an urgent need in this field for an electrolytic hydrogen peroxide oral water disinfection system to overcome the many drawbacks of existing technologies. Utility Model Content

[0007] To overcome the above deficiencies, this utility model provides an electrolytic hydrogen peroxide oral water disinfection system to solve the problems mentioned in the background art.

[0008] The technical solution of this utility model is: An electrolytic hydrogen peroxide oral disinfection system includes an electrolysis device, a finished product tank, a circulation tank, an electrolyte tank, a hydrogen peroxide tank, and a pure water tank. The electrolysis device is a three-chamber diaphragm electrolysis cell, which is provided with an anode chamber, a cathode chamber, and an intermediate chamber located between the anode chamber and the cathode chamber. The finished product tank, circulation tank, electrolyte tank, hydrogen peroxide tank and pure water tank are each equipped with a liquid level sensor, which includes a high liquid level sensor and a low liquid level sensor. The metering pump inlet is connected to the liquid outlet of the finished product tank, and the metering pump outlet is used to connect to the dental chair water supply pipeline; The inlet of the first electric valve is connected to the outlet of the circulation tank, and the outlet of the first electric valve is connected to the inlet of the finished product tank. The inlet of the circulating pump is connected to the outlet of the circulating tank, and the outlet of the circulating pump is connected to the inlet of the middle chamber of the three-chamber diaphragm electrolyzer. The inlet of the electrolyte pump is connected to the outlet of the electrolyte tank, and the outlet of the electrolyte pump is connected to the inlet of the middle chamber of the three-chamber diaphragm electrolyzer. The oxygen generator's outlet is connected in sequence to a lower limit flow meter and a second electric valve via a pipeline. The outlet of the second electric valve is connected to the oxygen inlet of the cathode chamber of the three-chamber diaphragm electrolyzer. The inlet of the first pure water pump is connected to the outlet of the pure water tank, and the outlet of the first pure water pump is connected to the inlet of the cathode chamber of the three-chamber diaphragm electrolytic cell. The inlet of the gas-liquid separator is connected to the outlet of the cathode chamber of the three-chamber diaphragm electrolyzer, and the outlet of the gas-liquid separator is connected to the inlet of the hydrogen peroxide tank. The inlet of the second pure water pump is connected to the outlet of the hydrogen peroxide tank, and the outlet of the second pure water pump is connected to the inlet of the intermediate chamber of the three-chamber diaphragm electrolyzer. The purpose is to enhance synthesis and improve efficiency, as the intermediate chamber is rich in ions and dissolved oxygen that migrate during electrolysis. Passing a solution containing hydrogen peroxide precursor into the intermediate chamber allows for further utilization of this environment to continuously synthesize hydrogen peroxide, thereby increasing the concentration and overall yield of the final product. For system thermal management, this circulating liquid flow effectively removes the heat generated in the anode chamber during electrolysis, helping to maintain the electrolyzer at its optimal temperature and extend equipment life. Maintaining system balance is also crucial; through rigorous fluid design and electrochemical verification, the amount and composition of materials added are controlled within a specific range, ensuring that the chemical and electrical balance necessary for ion migration in the intermediate chamber is not disrupted. Instead, this constitutes a highly efficient dynamic circulating reaction system.

[0009] The inlet of the third electric valve is connected to the pure water machine, and the outlet of the third electric valve is connected to the liquid inlet of the pure water tank. The control system is electrically connected to the power supply of the liquid level sensor, metering pump, first electric valve, circulation pump, electrolyte pump, second electric valve, lower limit flow meter, first pure water pump, second pure water pump, third electric valve, and the three-chamber diaphragm electrolyzer.

[0010] As a preferred technical solution, the inlet of the circulation tank is connected to the outlet of the middle chamber and the outlet of the anode chamber of the three-chamber diaphragm electrolytic cell via pipelines.

[0011] As a preferred technical solution, a flow meter for detecting water flow is installed on the water supply pipeline of the dental chair. The signal output terminal of the flow meter is electrically connected to the signal input terminal of the control system. The control system controls the dosage of the metering pump according to the flow signal.

[0012] As a preferred technical solution, the control system is configured to start the second pure water pump, the circulation pump and the electrolyte pump when the liquid level in the circulation tank is low to the low liquid level sensor of the circulation tank and the oxygen flow rate detected by the lower limit flow meter is greater than the set lower limit value, and then connect the power supply of the three-chamber diaphragm electrolyzer.

[0013] As a preferred technical solution, the control system is configured to control the power supply of the three-chamber diaphragm electrolyzer to be turned off when the liquid level in the circulation tank reaches the high liquid level sensor of the circulation tank; and to control the first electric valve to open and discharge liquid into the product tank when the liquid level in the product tank is lower than the high liquid level sensor of the product tank and the liquid level in the circulation tank is higher than the low liquid level sensor of the circulation tank, until the liquid level in the circulation tank drops to the low liquid level sensor of the circulation tank and the first electric valve is closed.

[0014] As a preferred technical solution, the control system is configured to perform the following liquid level interlock control: when the liquid level in the electrolyte tank is lower than the low liquid level sensor of the electrolyte tank, the electrolyte pump is controlled to stop and the power supply of the three-chamber diaphragm electrolyzer is cut off; when the liquid level in the electrolyte tank recovers to above the low liquid level sensor of the electrolyte tank and after a first preset delay time, it is restarted. When the liquid level in the electrolyte tank reaches the high liquid level sensor of the electrolyte tank, the replenishment stops; when the liquid level in the electrolyte tank is lower than the high liquid level sensor of the electrolyte tank and after a second preset delay time, the replenishment resumes. When the liquid level in the hydrogen peroxide tank is lower than the low liquid level sensor of the hydrogen peroxide tank, the power supply to the three-chamber diaphragm electrolyzer is cut off; when the liquid level in the hydrogen peroxide tank recovers to above the low liquid level sensor of the hydrogen peroxide tank and after a third preset delay time, electrolysis is restarted.

[0015] When the liquid level in the hydrogen peroxide tank reaches the high-level sensor of the hydrogen peroxide tank, the first pure water pump is controlled to shut down; when the liquid level in the hydrogen peroxide tank falls below the high-level sensor of the hydrogen peroxide tank and a fourth preset delay time has elapsed, the first pure water pump is controlled to start. When the liquid level in the pure water tank is lower than the low liquid level sensor of the pure water tank, the first pure water pump is controlled to stop; when the liquid level in the pure water tank reaches the high liquid level sensor of the pure water tank, the third electric valve is controlled to close; when the liquid level in the pure water tank is lower than the high liquid level sensor of the pure water tank and after a fifth preset delay time, the third electric valve is controlled to open.

[0016] A pure water tank is used to store the pure water required by the equipment. Electrolyte tank, used to store circulating electrolyte; A circulation tank is used to temporarily store and circulate the electrolyte during the electrolysis process; The finished product tank is used to store the finished hydrogen peroxide disinfectant solution that has been electrolyzed and passed inspection. The hydrogen peroxide tank is used to receive and temporarily store the initial hydrogen peroxide solution after separation from the liquid produced from the cathode chamber.

[0017] The workflow of this invention is automatically controlled by a control system: Disinfectant addition: The metering pump monitors the water flow in the main pipe of the dental chair in real time and adds hydrogen peroxide disinfectant from the finished product tank in proportion.

[0018] Finished product tank replenishment: When the finished product tank level is lower than the high level, the system initiates the replenishment procedure. The control system opens the first electric valve to discharge the electrolyzed and qualified liquid from the circulation tank into the finished product tank until the finished product tank reaches the high level or the circulation tank level drops to the low level.

[0019] Electrolysis start-up conditions: The system is ready to start electrolysis when the circulating tank level is lower than the high level. Start-up requires the following conditions to be met: the electrolyte tank level is higher than the low level, the hydrogen peroxide tank level is higher than the low level, the pure water tank level is higher than the low level, and the oxygen flow rate provided by the oxygen generator is greater than the lower limit flow rate.

[0020] Electrolysis process: Once the conditions are met, the second pure water pump, circulation pump, and electrolyte pump start simultaneously, pumping pure water, circulation liquid, and electrolyte into the three-chamber diaphragm electrolyzer. The electrolysis power supply is then started to begin electrolysis. In the cathode chamber, excess oxygen reacts with migrating hydrogen ions to produce hydrogen peroxide. Initially generated substandard liquid can be guided and discarded.

[0021] Electrolysis Circulation and Shutdown: The liquid generated during electrolysis (from the intermediate chamber and anode chamber) flows back to the circulation tank. Electrolysis is stopped when the liquid level in the circulation tank reaches the high level. At this point, the qualified liquid can be discharged into the finished product tank.

[0022] Automatic material replenishment: Electrolyte tank: Electrolysis stops and replenishment begins when the electrolyte level falls below the low level (replenishment source can be external). The level is replenished to above the low level, and operation resumes after a delay. Replenishment stops when the high level is reached. The electrolyte is a sodium sulfate solution.

[0023] Hydrogen peroxide tank: Electrolysis is stopped when the liquid level is below the low level and the tank is waiting for replenishment (either by the product liquid separation in the cathode chamber or externally). Electrolysis is restarted after the replenishment delay.

[0024] Pure water tank: When the liquid level reaches the high level, the third electric valve closes; when the liquid level falls below the high level and after a delay, the third electric valve opens to replenish water. When the liquid level falls below the low level, the first pure water pump stops working.

[0025] An electrolytic hydrogen peroxide oral disinfection system, employing the aforementioned technical solution, includes an electrolysis unit, a finished product tank, a circulation tank, an electrolyte tank, a hydrogen peroxide tank, and a pure water tank. The electrolysis unit is a three-chamber diaphragm electrolyzer, which comprises an anode chamber, a cathode chamber, and an intermediate chamber between the anode and cathode chambers. This system offers several advantages: it is ready to use immediately, safe, and efficient; hydrogen peroxide is generated on-site, eliminating the need to store high-concentration stock solutions, thus mitigating transportation and storage risks and ensuring the freshness and activity of the disinfectant. Precise dosing and dynamic control are achieved: the metering pump dynamically adds disinfectant based on the actual water flow rate of the dental chair, ensuring stable disinfectant concentration and preventing waste or insufficient dosage. Fully automated operation is implemented: the system uses level and flow sensors and program logic control to automate the entire process from solution preparation, replenishment, electrolysis to dosing, significantly reducing manual operation and maintenance costs. High resource utilization is achieved: the three-chamber electrolyzer ensures high reaction efficiency and rationally utilizes and recycles byproducts during electrolysis, resulting in high system integration. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of an embodiment of the present utility model; In the diagram: 1-Metering pump, 2-Finished product tank, 3-Circulation tank, 4-Circulation pump, 5-Three-chamber diaphragm electrolyzer, 6-Electrolyte pump, 7-Electrolyte tank, 8-Oxygen generator, 9-Lower limit flow meter, 10-Second pure water pump, 11-Pure water tank, 12-Third electric valve, 13-Pure water machine, 14-Gas-liquid separator, 15-Hydrogen peroxide tank, 17-First electric valve, 18-Second electric valve, 19-Dental chair water supply pipeline, 20-First pure water pump, 21-Flow meter, 22-Level sensor, H-High level sensor, L-Low level sensor. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example like Figure 1 As shown, an electrolytic hydrogen peroxide oral water disinfection system includes an electrolysis device, a finished product tank 2, a circulation tank 3, an electrolyte tank 7, a hydrogen peroxide tank 15, and a pure water tank 11. The electrolysis device is a three-chamber diaphragm electrolysis cell 5, which is provided with an anode chamber, a cathode chamber, and an intermediate chamber located between the anode chamber and the cathode chamber. The finished product tank 2, circulation tank 3, electrolyte tank 7, hydrogen peroxide tank 15 and pure water tank 11 are each equipped with a liquid level sensor. The liquid level sensor 22 includes a high liquid level sensor H and a low liquid level sensor L. Metering pump 1, the inlet of which is connected to the outlet of the finished product tank 2, and the outlet of metering pump 1 is used to connect to the dental chair water supply pipeline 19; The inlet of the first electric valve 17 is connected to the outlet of the circulation tank 3, and the outlet of the first electric valve 17 is connected to the inlet of the finished product tank 2. The inlet of the circulating pump 4 is connected to the outlet of the circulating tank 3, and the outlet of the circulating pump 4 is connected to the inlet of the middle chamber of the three-chamber diaphragm electrolytic cell 5. The inlet of the electrolyte pump 6 is connected to the outlet of the electrolyte tank 7, and the outlet of the electrolyte pump 6 is connected to the inlet of the middle chamber of the three-chamber diaphragm electrolyzer 5. The oxygen outlet of the oxygen generator 8 is connected in sequence to a lower limit flow meter 9 and a second electric valve 18 via a pipeline. The outlet of the second electric valve 18 is connected to the oxygen inlet of the cathode chamber of the three-chamber diaphragm electrolytic cell 5. The inlet of the first pure water pump 20 is connected to the outlet of the pure water tank 11, and the outlet of the first pure water pump 20 is connected to the inlet of the cathode chamber of the three-chamber diaphragm electrolytic cell 5. The inlet of the gas-liquid separator 14 is connected to the outlet of the cathode chamber of the three-chamber diaphragm electrolyzer 5, and the outlet of the gas-liquid separator 14 is connected to the inlet of the hydrogen peroxide tank 15. The inlet of the second pure water pump 10 is connected to the outlet of the hydrogen peroxide tank 15, and the outlet of the second pure water pump 10 is connected to the inlet of the middle chamber of the three-chamber diaphragm electrolyzer 5. The inlet of the third electric valve 12 is connected to the pure water machine 13, and the outlet of the third electric valve 12 is connected to the liquid inlet of the pure water tank 13. The control system is electrically connected to the power supply of the liquid level sensor, metering pump 1, first electric valve 17, circulation pump 4, electrolyte pump 6, second electric valve 18, lower limit flow meter 9, first pure water pump 20, second pure water pump 10, third electric valve 12, and the three-chamber diaphragm electrolytic cell 5.

[0030] The inlet of the circulation tank 4 is connected to the outlet of the middle chamber and the outlet of the anode chamber of the three-chamber diaphragm electrolytic cell 5 via pipelines.

[0031] A flow meter 21 for detecting water flow is installed on the water supply pipeline 19 of the dental chair. The signal output terminal of the flow meter 21 is electrically connected to the signal input terminal of the control system. The control system controls the dosing amount of the metering pump 1 according to the flow signal.

[0032] In actual operation, the control system of this invention continuously monitors the liquid levels and oxygen flow rate.

[0033] When the liquid level in the finished product tank 2 drops below the high liquid level sensor H of the finished product tank 2, and the liquid level in the circulation tank 3 is higher than the low liquid level sensor L of the circulation tank, the control system opens the first electric valve 17 to replenish the qualified hydrogen peroxide solution in the circulation tank 3 to the finished product tank 2.

[0034] When the liquid level in circulation tank 3 drops to the low level sensor L of circulation tank 3, the system prepares for a new round of electrolysis. At this time, if the liquid level in electrolyte tank 7 is greater than the low level sensor L of electrolyte tank 7, the liquid level in hydrogen peroxide tank 15 is greater than the low level sensor L of hydrogen peroxide tank 15, the liquid level in pure water tank 11 is greater than the low level sensor L of pure water tank 11, and the lower limit flow meter 9 detects that the oxygen flow rate meets the standard, then the control system starts the second pure water pump 10, circulation pump 4 and electrolyte pump 6. After the fluid stabilizes, the three-chamber diaphragm electrolyzer 5 is energized for electrolysis.

[0035] During electrolysis, the hydrogen peroxide-containing liquid produced in the cathode chamber enters the gas-liquid separator 14, where the gas is discharged and the liquid is temporarily stored in the hydrogen peroxide tank 15. When the liquid level in the hydrogen peroxide tank 15 reaches the high-level hydrogen peroxide sensor H, the control system stops the first pure water pump 12, suspending water supply to the cathode chamber, thereby slowing down the production of electrolyte. When electrolyte needs to be replenished, the transfer pump is started to pump sodium sulfate liquid into the electrolyte tank 7.

[0036] The entire system's replenishment logic (pure water tank 11, electrolyte tank 7) is automatically started and stopped through level sensors (H, L) and time-delay relays, avoiding frequent actions and ensuring the stability of system operation.

[0037] To ensure uninterrupted water supply to the dental chair, the system is designed with an electrolytic solution production capacity far exceeding the disinfectant dosing capacity of the metering pump (1) under the maximum water usage conditions of the dental chair. In addition, if the system detects an electrolysis failure or an abnormal liquid level in the finished product tank (2), the control system will issue an alarm and can switch to emergency mode to directly supply ordinary pure water without hydrogen peroxide, thereby ensuring the basic water needs of the dental chair and avoiding interruption of treatment.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An electrolytic hydrogen peroxide oral water disinfection system, characterized in that: It includes an electrolysis device, a finished product tank, a circulation tank, an electrolyte tank, a hydrogen peroxide tank, and a pure water tank. The electrolysis device is a three-chamber diaphragm electrolysis cell, which is provided with an anode chamber, a cathode chamber, and an intermediate chamber located between the anode chamber and the cathode chamber. The finished product tank, circulation tank, electrolyte tank, hydrogen peroxide tank and pure water tank are each equipped with a liquid level sensor, which includes a high liquid level sensor and a low liquid level sensor. The metering pump inlet is connected to the liquid outlet of the finished product tank, and the metering pump outlet is used to connect to the dental chair water supply pipeline; The inlet of the first electric valve is connected to the outlet of the circulation tank, and the outlet of the first electric valve is connected to the inlet of the finished product tank. The inlet of the circulating pump is connected to the outlet of the circulating tank, and the outlet of the circulating pump is connected to the inlet of the middle chamber of the three-chamber diaphragm electrolyzer. The inlet of the electrolyte pump is connected to the outlet of the electrolyte tank, and the outlet of the electrolyte pump is connected to the inlet of the middle chamber of the three-chamber diaphragm electrolyzer. The oxygen generator's outlet is connected in sequence to a lower limit flow meter and a second electric valve via a pipeline. The outlet of the second electric valve is connected to the oxygen inlet of the cathode chamber of the three-chamber diaphragm electrolyzer. The inlet of the first pure water pump is connected to the outlet of the pure water tank, and the outlet of the first pure water pump is connected to the inlet of the cathode chamber of the three-chamber diaphragm electrolytic cell. The inlet of the gas-liquid separator is connected to the outlet of the cathode chamber of the three-chamber diaphragm electrolyzer, and the outlet of the gas-liquid separator is connected to the inlet of the hydrogen peroxide tank. The inlet of the second pure water pump is connected to the outlet of the hydrogen peroxide tank, and the outlet of the second pure water pump is connected to the inlet of the middle chamber of the three-chamber diaphragm electrolyzer. The inlet of the third electric valve is connected to the pure water machine, and the outlet of the third electric valve is connected to the liquid inlet of the pure water tank. The control system is electrically connected to the power supply of the liquid level sensor, metering pump, first electric valve, circulation pump, electrolyte pump, second electric valve, lower limit flow meter, first pure water pump, second pure water pump, third electric valve, and the three-chamber diaphragm electrolyzer.

2. The oral cavity disinfection system based on electrolytic hydrogen peroxide as described in claim 1, characterized in that: The inlet of the circulation tank is connected to the outlet of the middle chamber and the outlet of the anode chamber of the three-chamber diaphragm electrolytic cell via pipelines.

3. The oral cavity disinfection system based on electrolytic hydrogen peroxide as described in claim 1, characterized in that: A flow meter for detecting water flow is installed on the water supply pipeline of the dental chair. The signal output terminal of the flow meter is electrically connected to the signal input terminal of the control system. The control system controls the dosing amount of the metering pump according to the flow signal.

4. The oral cavity disinfection system based on electrolytic hydrogen peroxide as described in claim 1, characterized in that: The control system is configured to start the second pure water pump, the circulation pump, and the electrolyte pump when the liquid level in the circulation tank is low to the low liquid level sensor of the circulation tank and the oxygen flow rate detected by the lower limit flow meter is greater than the set lower limit value, and then connect the power supply to the three-chamber diaphragm electrolyzer.

5. The oral cavity water disinfection system according to claim 1, characterized in that: The control system is configured to shut off the power supply to the three-chamber diaphragm electrolyzer when the liquid level in the circulation tank reaches the high level sensor of the circulation tank; and to open the first electric valve to discharge liquid into the product tank when the liquid level in the product tank is lower than the high level sensor of the product tank and the liquid level in the circulation tank is higher than the low level sensor of the circulation tank, until the liquid level in the circulation tank drops to the low level sensor of the circulation tank and then the first electric valve is closed.

6. The oral cavity water disinfection system according to claim 1, characterized in that: The control system is configured to perform the following liquid level interlock control: when the liquid level in the electrolyte tank is lower than the low liquid level sensor of the electrolyte tank, the electrolyte pump is controlled to stop and the power supply to the three-chamber diaphragm electrolyzer is cut off; when the liquid level in the electrolyte tank recovers to above the low liquid level sensor of the electrolyte tank and after a first preset delay time, it is restarted. When the liquid level in the electrolyte tank reaches the high liquid level sensor of the electrolyte tank, the replenishment stops; when the liquid level in the electrolyte tank is lower than the high liquid level sensor of the electrolyte tank and after a second preset delay time, the replenishment resumes. When the liquid level in the hydrogen peroxide tank is lower than the low liquid level sensor of the hydrogen peroxide tank, the power supply to the three-chamber diaphragm electrolyzer is cut off; when the liquid level in the hydrogen peroxide tank recovers to above the low liquid level sensor of the hydrogen peroxide tank and after a third preset delay time, electrolysis is restarted. When the liquid level in the hydrogen peroxide tank reaches the high-level sensor of the hydrogen peroxide tank, the first pure water pump is controlled to shut down; when the liquid level in the hydrogen peroxide tank falls below the high-level sensor of the hydrogen peroxide tank and a fourth preset delay time has elapsed, the first pure water pump is controlled to start. When the liquid level in the pure water tank is lower than the low liquid level sensor of the pure water tank, the first pure water pump is controlled to stop; when the liquid level in the pure water tank reaches the high liquid level sensor of the pure water tank, the third electric valve is controlled to close; when the liquid level in the pure water tank is lower than the high liquid level sensor of the pure water tank and after a fifth preset delay time, the third electric valve is controlled to open.

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