High-concentration sodium hypochlorite solution generator and control method
By integrating a gas-liquid separation and analysis manifold and sensing system with a central controller, the problem of real-time and accurate measurement of effective chlorine concentration and current efficiency in the sodium hypochlorite solution production process is solved, and efficient and economical production control is achieved.
Patent Information
- Application Number
- CN202511526648.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-24
- Publication Date
- 2026-01-23
AI Technical Summary
Existing technologies cannot achieve online, real-time, and precise monitoring and control of the sodium hypochlorite solution production process, especially the accurate measurement and evaluation of effective chlorine concentration and current efficiency, resulting in problems such as insufficient measurement accuracy, increased energy consumption, and high maintenance costs.
An integrated gas-liquid separation and analysis manifold, sensing system, and central controller are employed. By monitoring hydrogen generation rate and current data, combined with temperature and pH value, a multi-physical quantity fusion monitoring and control system is established to achieve real-time, accurate measurement and closed-loop control of sodium hypochlorite solution.
It enables online, real-time, and high-precision monitoring of the sodium hypochlorite solution production process, reduces energy consumption and maintenance costs, improves the automation and quality stability of the production process, and enhances the robustness and environmental adaptability of the system.
Smart Images
Figure CN121380988A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electrochemical engineering, specifically to a high-concentration sodium hypochlorite solution generator and its control method. Background Technology
[0002] Sodium hypochlorite solution, as a broad-spectrum and highly efficient disinfectant and oxidant, is widely used in water treatment, fine chemicals, and environmental disinfection. Its mainstream production method is the electrolysis of saturated brine. In this process, the concentration of the final product, sodium hypochlorite, is typically characterized by its available chlorine content, which is the core indicator for measuring product quality. Meanwhile, the current efficiency of the electrolyzer is a key parameter for evaluating system energy consumption and electrode health.
[0003] Existing technologies have significant drawbacks in monitoring these two core indicators. First, for monitoring effective chlorine concentration, traditional online sensors such as ORP, redox potentiometers, or conductivity meters are highly susceptible to interference from factors such as electrolyte temperature, pH value, and raw material salt concentration, resulting in insufficient measurement accuracy and failing to meet the needs of refined production. On the other hand, accurate concentration measurement relies on offline analytical methods such as chemical titration, which are cumbersome, time-consuming, and have significant lag, failing to provide real-time feedback and guidance for the production process, thus making it difficult to achieve closed-loop automatic control of product concentration.
[0004] Secondly, there is currently a lack of direct and effective technical means for online assessment of current efficiency. Current efficiency gradually declines due to scaling or passivation of electrodes over prolonged use. Because it is impossible to monitor these dynamic changes online in real time, companies not only suffer unnecessary energy losses, but more importantly, they cannot predict the health status of the electrodes. They can only perform reactive fault repairs after electrode performance has severely deteriorated or failed, rather than more cost-effective predictive maintenance. This increases the operational risks and maintenance costs of the system. Therefore, there is an urgent need in this field for a technical solution that enables online, real-time, and precise monitoring and control of the sodium hypochlorite production process.
[0005] The information disclosed in the background section above is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention
[0006] The purpose of this invention is to provide a high-concentration sodium hypochlorite solution generator and control method to solve the problems mentioned in the background art.
[0007] The technical solution of the present invention includes: Integrated high-concentration sodium hypochlorite electrolytic cell; An integrated gas-liquid separation and analysis manifold is provided, wherein the manifold is sealed and connected to the liquid and gas mixture outlet of the electrolytic cell; the upper part of the manifold is provided with a gas outlet and the lower part is provided with a liquid outlet; An information capture chamber, wherein the information capture chamber is a fixed volume gas outlet connected to the manifold; The sensing system includes a hydrogen mass flow meter, a DC current sensor, and an outlet liquid flow meter; the hydrogen mass flow meter is installed in the information capture chamber, the DC current sensor is installed on the circuit that powers the electrolytic cell, and the outlet liquid flow meter is installed on the product output pipeline led out from the liquid outlet of the manifold. The central controller is connected to the hydrogen mass flow meter, the DC current sensor and the outlet liquid flow meter respectively, and connects the control output signal to the DC power supply module of the electrolytic cell.
[0008] Preferably, the integrated gas-liquid separation and analysis manifold is a micro cyclone separation structure; the inlet of the manifold is coaxially connected to the product outlet of the electrolytic cell, and a channel is provided after the inlet to guide the gas-liquid mixture tangentially into the cylindrical cyclone cavity; a gas guide pipe for discharging gas is provided at the top center of the cyclone cavity, and a liquid outlet for discharging liquid is provided around the bottom periphery of the cyclone cavity.
[0009] Preferably, the sensing system further includes an electrolyte temperature sensor and a pH sensor; both the electrolyte temperature sensor and the pH sensor are installed on the product output pipeline and are signal-connected to the central controller.
[0010] Preferably, the manifold is internally provided with baffles, swirl vanes, or labyrinth channels for forced separation of flow paths.
[0011] A method for controlling a high-concentration sodium hypochlorite solution generator includes: S1. Real-time acquisition of total current data from the DC current sensor, actual hydrogen generation rate data from the hydrogen mass flow meter, and solution flow rate data from the outlet liquid flow meter; S2. Calculate the theoretical hydrogen generation rate based on the total current data, and compare the actual hydrogen generation rate with the theoretical hydrogen generation rate to determine the real-time current efficiency. S3. Calculate the real-time effective chlorine concentration based on the actual hydrogen generation rate and the solution flow rate data; S4. Compare the real-time effective chlorine concentration with the preset target concentration to calculate the error, and adjust the output current of the DC power supply module according to the error.
[0012] 6. The method for controlling a high-concentration sodium hypochlorite solution generator according to claim 5, characterized in that, after step S3, the following is included: S31. Real-time acquisition of temperature data from the electrolyte temperature sensor and pH data from the pH sensor; S32. Based on the temperature data and pH data, call the preset model to correct the real-time effective chlorine concentration to compensate for the calculation deviation caused by temperature and pH changes.
[0013] Preferably, step S2 is followed by: S21. Compare the real-time current efficiency with a preset efficiency warning threshold; S22. When the real-time current efficiency is lower than the efficiency warning threshold, an alarm is triggered to perform predictive maintenance of the electrode health status.
[0014] Preferably, in step S4, a proportional-integral-derivative control algorithm is used to calculate the current adjustment based on the error.
[0015] This invention provides an improved high-concentration sodium hypochlorite solution generator and control method, which, compared with the prior art, has the following improvements and advantages: 1. This solution achieves online, real-time, and high-precision indirect measurement of effective chlorine concentration. Existing technologies rely on online sensors that are easily affected by factors such as electrolyte temperature and pH, resulting in insufficient accuracy. Furthermore, precise chemical titration methods suffer from significant lag. This solution takes a unique approach, not directly measuring the sodium hypochlorite solution, but instead using a hydrogen mass flow meter to accurately capture the actual hydrogen generation rate of the byproduct hydrogen, which has a strict stoichiometric relationship with its production. Combined with the solution flow rate data provided by the outlet liquid flow meter, the central controller can calculate the real-time effective chlorine concentration based on material balance principles. This shift in measurement paradigm avoids the measurement difficulties caused by environmental changes in traditional sensors and establishes a concentration monitoring system based on physical quantity measurement with strong anti-interference capabilities. 2. This solution enables online continuous assessment and predictive maintenance of electrolyzer current efficiency. Existing technologies cannot monitor the dynamic changes in current efficiency online, leading to ineffective energy loss and requiring reactive repairs only after severe electrode performance degradation. This solution, by paralleling DC current sensors and hydrogen mass flow meters, allows the central controller to acquire the total input current and actual reaction output in parallel. The controller converts the total current data into the theoretical hydrogen generation rate and compares it with the actual hydrogen generation rate in real time, thereby continuously and directly calculating the real-time current efficiency. When this efficiency falls below a preset efficiency warning threshold, the system can proactively trigger an alarm. This function transforms the electrode health status from unknown to transparent, providing solid data support for predictive maintenance and significantly improving the economic benefits throughout the equipment's lifecycle. 3. A precise and rapid-response closed-loop control system for the production process was constructed. Due to the lag of traditional monitoring methods, automatic control of the production process is impossible. In this solution, the integrated gas-liquid separation and analysis manifold and its connected information capture chamber ensure zero-delay capture of hydrogen signals, providing second-level process feedback to the central controller. The controller compares the calculated real-time effective chlorine concentration with the preset target concentration, calculates the error using a proportional-integral-derivative PID control algorithm, and adjusts the output current of the DC power supply module accordingly. This high-frequency dynamic adjustment can automatically overcome external disturbances such as raw material fluctuations, accurately stabilizing the effective chlorine concentration of the final product near the target value, achieving full automation and constant quality throughout the production process. 4. The robustness of the system is improved through multi-physical quantity fusion analysis. The sensing system in this scheme does not operate in isolation, but is equipped with an electrolyte temperature sensor and a pH sensor. The central controller dynamically corrects the calculated real-time effective chlorine concentration by calling a preset model based on the real-time collected temperature and pH data. This multi-dimensional correction mechanism compensates for the impact of temperature and pH changes on the side reactions and product stability, so that the concentration calculation results remain highly accurate under complex and variable operating conditions, greatly enhancing the environmental adaptability and reliability of the entire monitoring and control system. Attached Figure Description
[0016] The present invention will be further explained below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of the generator; Figure 2 This is a schematic diagram of the sensor system. Figure 3 This is a schematic diagram of the liquid outlet and its connection structure; Figure 4 This is a schematic diagram of the process flow of the method of the present invention; In the diagram: 1. Electrolyzer; 2. Integrated gas-liquid separation and analysis manifold; 21. Gas outlet; 22. Liquid outlet; 3. Information capture chamber; 4. Sensing system; 41. Hydrogen mass flow meter; 42. DC current sensor; 43. Outlet liquid flow meter; 44. Electrolyte temperature sensor; 45. pH sensor; 5. Central controller. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.
[0018] Example 1
[0019] Please see Figure 1-3 This invention provides a high-concentration sodium hypochlorite solution generator, comprising: Integrated high-concentration sodium hypochlorite electrolytic cell 1; An integrated gas-liquid separation and analysis manifold 2 is sealed and connected to the liquid and gas mixture outlet of the electrolytic cell 1; the upper part of the manifold is provided with a gas outlet 21 and the lower part with a liquid outlet 22. Information capture chamber 3, which is a fixed volume gas outlet 21 connected to the manifold; The sensing system 4 includes a hydrogen mass flow meter 41, a DC current sensor 42, and an outlet liquid flow meter 43. The hydrogen mass flow meter 41 is installed in the information capture chamber 3, the DC current sensor 42 is installed on the circuit that powers the electrolyzer 1, and the outlet liquid flow meter 43 is installed on the product output pipeline led out from the liquid outlet 22 of the manifold. The central controller 5 is connected to the hydrogen mass flow meter 41, the DC current sensor 42 and the outlet liquid flow meter 43 respectively, and connects the control output signal to the DC power supply module of the electrolyzer 1. To address the challenge of accurately monitoring sodium hypochlorite concentration and current efficiency online in existing technologies, this embodiment provides a high-concentration sodium hypochlorite solution generator. This generator uses hydrogen gas, a byproduct generated during electrolysis, as a carrier of core reaction process information. Through an integrated electromechanical sensing system 4 and analysis algorithms, it achieves precise monitoring and closed-loop control of the production process. The generator includes an integrated high-concentration sodium hypochlorite electrolytic cell 1, whose product outlet is sealed to an integrated gas-liquid separation and analysis manifold 2, which separates the gas-liquid mixture. The separated gas enters an information capture chamber 3 connected to the manifold gas outlet 21, and a hydrogen mass flow meter 41 is installed on the chamber. The separated liquid enters a product output pipeline through a liquid outlet 22, and an outlet liquid flow meter 43 is installed on the pipeline. A DC current sensor 42 is installed on the circuit supplying power to the electrolytic cell 1. All sensors are connected to a central controller 5, which sends control commands to the DC power module of the electrolytic cell 1 based on the collected signals, thus forming a complete closed-loop system from information acquisition to process control.
[0020] The integrated gas-liquid separation and analysis manifold 2 is a micro cyclone separation structure; the inlet of the manifold is coaxially connected to the product outlet of the electrolytic cell 1, and after the inlet is a channel to guide the gas-liquid mixture tangentially into the cylindrical cyclone cavity; a gas guide tube for discharging gas is provided at the top center of the cyclone cavity, and a liquid outlet 22 for discharging liquid is provided around the bottom periphery of the cyclone cavity. In this embodiment, the integrated gas-liquid separation and analysis manifold 2 is specifically a micro-cyclone separation structure to achieve efficient and continuous separation of the gas and liquid phases. The inlet of the manifold is coaxially connected to the product outlet of the electrolyzer 1 to ensure that all product mixtures enter the manifold. A channel is provided after the inlet, which guides the gas-liquid mixture tangentially into the cylindrical cyclone cavity. After entering the cyclone cavity, the mixture rotates at high speed. Under the action of centrifugal force, the denser sodium hypochlorite solution is pushed against the inner wall of the cavity and moves spirally downward along the wall, and is discharged from the liquid outlet 22 located at the bottom periphery of the cyclone cavity. At the same time, the less dense hydrogen gas gathers in the central axis region of the cyclone cavity to form a stable gas core. At the top center of the cyclone cavity, a gas guide pipe is provided, which guides the pure hydrogen gas in the central gas core region upward to the information capture cavity 3. This structural design ensures that the gas and liquid can be separated in a very short time and distance, providing a basis for subsequent real-time measurement.
[0021] The sensing system 4 also includes an electrolyte temperature sensor 44 and a pH sensor 45; both the electrolyte temperature sensor 44 and the pH sensor 45 are installed on the product output pipeline and are connected to the central controller 5 via signal. To improve the accuracy of concentration calculation, this embodiment adds an electrolyte temperature sensor 44 and a pH sensor 45 to the aforementioned sensing system 4. Since the degree of side reactions during electrolysis and the stability of the sodium hypochlorite product are significantly affected by temperature and pH, fluctuations in these two parameters can interfere with the accuracy of concentration calculation based on hydrogen production. Therefore, the electrolyte temperature sensor 44 and pH sensor 45 are installed on the product output pipeline and connected to the central controller 5. The central controller 5 uses real-time collected temperature and pH data to correct the baseline concentration value calculated based on hydrogen production, compensating for calculation deviations caused by changes in operating conditions, thereby improving the robustness and accuracy of the concentration monitoring model.
[0022] The manifold is equipped with baffles, swirl vanes, or labyrinth channels for forced separation of flow paths; As an alternative implementation besides the micro-cyclone separation structure, the integrated gas-liquid separation and analysis manifold 2 can be equipped with other types of forced separation flow paths; for example, baffles, cyclone blades, or labyrinth channels can be installed inside the manifold; when the sodium hypochlorite solution mixture carrying hydrogen bubbles enters the manifold at high speed, these internal structures will force a change in the direction of fluid movement or cause it to rotate; based on the density difference between liquid and gas, when the momentum changes drastically, the less dense hydrogen can be efficiently separated from the liquid phase, thereby achieving a gas-liquid separation effect similar to that of the micro-cyclone separation structure.
[0023] Example 2
[0024] Please see Figure 4 A method for controlling a high-concentration sodium hypochlorite solution generator, comprising: S1. Real-time acquisition of total current data from DC current sensor 42, actual hydrogen generation rate data from hydrogen mass flow meter 41, and solution flow rate data from outlet liquid flow meter 43. S2. Calculate the theoretical hydrogen generation rate based on the total current data, and compare the actual hydrogen generation rate with the theoretical hydrogen generation rate to determine the real-time current efficiency. S3. Calculate the real-time effective chlorine concentration based on the actual hydrogen generation rate and solution flow rate data; S4. Compare the real-time effective chlorine concentration with the preset target concentration to calculate the error, and adjust the output current of the DC power supply module according to the error; This embodiment provides a control method for a high-concentration sodium hypochlorite solution generator. In step S1, the central controller 5 synchronously acquires the total current data of the DC current sensor 42, the actual hydrogen generation rate data of the hydrogen mass flow meter 41, and the solution flow rate data of the outlet liquid flow meter 43 at a preset frequency, such as 1Hz. In step S2, the controller calculates the theoretically required hydrogen generation rate using the acquired total current data based on Faraday's law of electrolysis. This theoretical rate is then compared with the actual hydrogen generation rate measured by the hydrogen mass flow meter 41. The ratio of the two is the real-time current efficiency of the system. In step S3, the controller converts the actual hydrogen generation rate into the sodium hypochlorite generation rate based on the stoichiometric relationship of the electrolysis reaction, and then divides it by the solution flow rate data measured by the outlet liquid flow meter 43 to calculate the real-time effective chlorine concentration. This method avoids the measurement difficulties caused by environmental changes in traditional sensors by monitoring hydrogen, a byproduct that has a strict stoichiometric relationship with sodium hypochlorite production, and establishes a concentration monitoring system with strong anti-interference ability based on physical quantity measurement. In step S4, the controller compares the calculated real-time effective chlorine concentration with the preset target concentration value to obtain the error, and adjusts the output current of the DC power supply module supplied to the electrolytic cell 1 according to the error. If the concentration is too low, the current is increased, and vice versa, so as to realize closed-loop automatic control of the concentration.
[0025] The steps following S3 include: S31. Real-time acquisition of temperature data from electrolyte temperature sensor 44 and pH data from pH sensor 45; S32. Based on temperature and pH data, call the preset model to correct the real-time available chlorine concentration to compensate for calculation deviations caused by temperature and pH changes. To further improve control accuracy, this embodiment adds a concentration correction step based on the above method. After calculating the basic real-time effective chlorine concentration in step S3, step S31 is executed, where the central controller 5 obtains temperature and pH data in real time from the electrolyte temperature sensor 44 and pH sensor 45 installed on the product output pipeline. In step S32, the controller calls a preset correction model, which is related to the influence of different temperatures and pH values on the formation and decomposition reaction of sodium hypochlorite. The model receives real-time data from electrolyte temperature sensor 44 and pH sensor 45 as input, and dynamically corrects the basic concentration value calculated based on the amount of hydrogen based on this data. This multi-dimensional correction mechanism compensates for the impact of temperature and pH changes on side reactions and product stability, so that the concentration calculation results remain highly accurate under complex and variable working conditions. The controller inputs the real-time temperature and pH data into the model to compensate and correct the baseline concentration value calculated in S3, so as to eliminate the calculation deviation caused by the operating conditions deviating from the ideal state, thereby obtaining an effective chlorine concentration that is closer to the actual value, and using the corrected concentration value for subsequent closed-loop control.
[0026] The steps following S2 include: S21. Compare the real-time current efficiency with the preset efficiency warning threshold. S22. When the real-time current efficiency is lower than the efficiency warning threshold, an alarm is triggered to perform predictive maintenance of the electrode health status. This threshold is a key indicator for determining whether the electrode has experienced performance degradation, such as scaling or passivation. When the real-time current efficiency falls below this threshold, the system will issue an alarm to prompt operators to perform inspection or maintenance, thereby achieving a shift from fault-based repair to predictive maintenance. This embodiment adds a predictive maintenance function regarding the health status of the equipment based on the above method. After calculating the real-time current efficiency in step S2, step S21 is executed, where the central controller 5 compares the real-time current efficiency value with a preset efficiency warning threshold, such as 85%. In step S22, if the controller determines that the real-time current efficiency is lower than the warning threshold, it automatically triggers an alarm device to issue a warning to the operator. This warning indicates that the electrodes may have experienced performance degradation phenomena such as scaling or passivation, prompting the need for inspection or maintenance. In this way, the shift from fault repair to predictive maintenance can be realized, reducing the system's operational risks and maintenance costs.
[0027] In step S4, a proportional-integral-derivative control algorithm is used to calculate the current adjustment based on the error. In this embodiment, the control algorithm of step S4 above is specified. After the central controller 5 compares the real-time effective chlorine concentration with the preset target concentration and calculates the error, a proportional-integral-derivative (PID) control algorithm is used to calculate the current adjustment of the DC power supply module. This algorithm comprehensively considers the current error, proportional P, the accumulation of historical errors, integral I, and the trend of error change, and derivative D to generate a precise control output signal. Using the PID control algorithm can make the current adjustment process more stable, faster, and more accurate, effectively suppress system disturbances, avoid large fluctuations in concentration, and ensure that the final product concentration can be stably maintained near the target value.
[0028] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims
1. A high-concentration sodium hypochlorite solution generator, characterized in that, include: Integrated high-concentration sodium hypochlorite electrolyzer (1); An integrated gas-liquid separation and analysis manifold (2) is sealed and connected to the liquid and gas mixture outlet of the electrolytic cell (1); the upper part of the manifold is provided with a gas outlet (21) and the lower part is provided with a liquid outlet (22). Information capture chamber (3), the information capture chamber (3) is a fixed volume gas outlet (21) connected to the manifold; The sensing system (4) includes a hydrogen mass flow meter (41), a DC current sensor (42), and an outlet liquid flow meter (43); the hydrogen mass flow meter (41) is installed in the information capture chamber (3), the DC current sensor (42) is installed on the circuit that supplies power to the electrolytic cell (1), and the outlet liquid flow meter (43) is installed on the product output pipeline led out from the liquid outlet (22) of the manifold; The central controller (5) is connected to the hydrogen mass flow meter (41), the DC current sensor (42) and the outlet liquid flow meter (43) respectively, and connects the control output signal to the DC power supply module of the electrolytic cell (1).
2. The high-concentration sodium hypochlorite solution generator according to claim 1, characterized in that, The integrated gas-liquid separation and analysis manifold (2) is a micro cyclone separation structure; the inlet of the manifold is coaxially connected to the product outlet of the electrolytic cell (1), and the inlet is a channel for guiding the gas-liquid mixture tangentially into the cylindrical cyclone cavity; a gas guide pipe for discharging gas is provided at the top center of the cyclone cavity, and a liquid outlet (22) for discharging liquid is provided around the bottom periphery of the cyclone cavity.
3. A high-concentration sodium hypochlorite solution generator according to claim 2, characterized in that, The sensing system (4) also includes an electrolyte temperature sensor (44) and a pH sensor (45); the electrolyte temperature sensor (44) and the pH sensor (45) are both installed on the product output pipeline and are signal connected to the central controller (5).
4. A high-concentration sodium hypochlorite solution generator according to claim 1, characterized in that, The manifold is internally equipped with baffles, swirl vanes, or labyrinth channels for forced separation of flow paths.
5. A control method for a high-concentration sodium hypochlorite solution generator, applied to the high-concentration sodium hypochlorite solution generator according to claim 1, characterized in that, include: S1. Real-time acquisition of total current data of the DC current sensor (42), actual hydrogen generation rate data of the hydrogen mass flow meter (41), and solution flow rate data of the outlet liquid flow meter (43); S2. Calculate the theoretical hydrogen generation rate based on the total current data, and compare the actual hydrogen generation rate with the theoretical hydrogen generation rate to determine the real-time current efficiency. S3. Calculate the real-time effective chlorine concentration based on the actual hydrogen generation rate and the solution flow rate data; S4. Compare the real-time effective chlorine concentration with the preset target concentration to calculate the error, and adjust the output current of the DC power supply module according to the error.
6. The control method for a high-concentration sodium hypochlorite solution generator according to claim 5, characterized in that, The step S3 is followed by: S31. Real-time acquisition of temperature data from the electrolyte temperature sensor (44) and pH data from the pH sensor (45); S32. Based on the temperature data and pH data, call the preset model to correct the real-time effective chlorine concentration to compensate for the calculation deviation caused by temperature and pH changes.
7. The method for controlling a high-concentration sodium hypochlorite solution generator according to claim 5, characterized in that, Step S2 is followed by: S21. Compare the real-time current efficiency with a preset efficiency warning threshold; S22. When the real-time current efficiency is lower than the efficiency warning threshold, an alarm is triggered to perform predictive maintenance of the electrode health status.
8. The control method for a high-concentration sodium hypochlorite solution generator according to claim 5, characterized in that, In step S4, a proportional-integral-derivative control algorithm is used to calculate the current adjustment based on the error.