A food material purifier with an intelligent residual chlorine reduction system and a control method thereof

Abstract

The present application relates to the technical field of food material purification equipment, and provides a food material purification machine with an intelligent residual chlorine reduction system and a control method thereof.The food material purification machine comprises a main machine shell, a purification bin, a water inlet valve, a water outlet valve, a power supply unit and an intelligent residual chlorine reduction system, and is characterized in that the intelligent residual chlorine reduction system comprises: a primary purification module installed on the water inlet side of the purification bin, used for receiving water of the food material purification machine, performing residual chlorine reduction treatment on the water to reduce the free residual chlorine concentration in the water, and obtaining low residual chlorine load water; and an electrolytic purification module installed inside the purification bin, used for performing electrolytic purification treatment on the low residual chlorine load water according to the low residual chlorine load water and electrolytic parameters.The present application combines historical multi-source efficiency benchmark data with real-time residual chlorine deviation to link and control the working condition variables, so that the inhibition of chlorine side reaction and the purification efficiency are dynamically balanced, and the problems of excessive residual chlorine and unstable purification are solved.

Description

Technical Field

[0001] This invention relates to the field of food purification equipment technology, specifically to a food purification machine with an intelligent residual chlorine reduction system and its control method. Background Technology

[0002] With the improvement of people's living standards, food safety issues have received increasing attention. Residual pesticides, veterinary drugs, bacteria, and other harmful substances on the surface of food pose a potential threat to human health. Currently, various food purification devices have emerged on the market, primarily using electrolysis technology to generate active substances such as hydroxyl radicals to degrade pesticide residues and kill bacteria. However, existing electrolytic food purifiers have the following technical shortcomings: First, the generation of residual chlorine is difficult to avoid during the electrolysis process. Chloride ions in tap water undergo a chlorine evolution reaction on the anode surface, generating chlorine gas that dissolves in water to form hypochlorous acid and free residual chlorine. Although residual chlorine has a certain bactericidal effect, excessive residual chlorine will remain on the surface of food, not only affecting the taste but also potentially posing a health hazard with long-term consumption. Traditional equipment lacks an effective mechanism to inhibit the generation of residual chlorine, and the concentration of residual chlorine in the effluent after electrolysis often exceeds the maximum limit of drinking water standards. Second, existing equipment mostly uses a fixed-parameter electrolysis mode, unable to dynamically adjust the electrolysis intensity according to changes in water quality, food type, and degree of contamination, resulting in unstable purification effects or excessive energy consumption. Third, traditional electrode coatings primarily aim to improve the efficiency of active substance generation, neglecting the problem of inhibiting residual chlorine production. The chlorine evolution reaction and the oxygen evolution reaction compete on the electrode surface, and existing electrode coatings have failed to effectively regulate this competing process. Therefore, developing an intelligent food purifier that can reduce residual chlorine through the synergistic effect of primary purification, current control, and electrode coating, and that can be verified based on multi-source data comparison, is a pressing technical problem that needs to be solved in this field. Summary of the Invention

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A food purifier with an intelligent residual chlorine reduction system includes a main unit housing, a purification chamber, a water inlet valve, a drain valve, a power supply unit, and an intelligent residual chlorine reduction system, wherein the intelligent residual chlorine reduction system includes: The primary purification module is installed on the water inlet side of the purification chamber. It receives the water from the food purification machine and performs residual chlorine reduction treatment on the water to reduce the concentration of free residual chlorine in the water and obtain water with low residual chlorine load. The electrolytic purification module is installed inside the purification chamber. It is used to perform electrolytic purification treatment on water with low residual chlorine load based on the water with low residual chlorine load and the electrolysis parameters. During the electrolysis process, it suppresses the chlorine evolution side reaction to reduce the amount of residual chlorine generated and obtains electrolytic purified water. The residual chlorine concentration sensing module is installed at the bottom of the purification chamber to detect the residual chlorine concentration in the electrolyzed purified water and generate a corresponding residual chlorine concentration signal. An electrolysis parameter control module, installed on the outside of the main unit housing, is used to receive adjustment commands and dynamically adjust the electrolysis parameters based on the adjustment commands. The electrolysis parameters include at least current density, electrolysis time, and effective electrolysis area. The adjusted electrolysis parameters are then output to the electrolysis purification module. The coordinated chlorine reduction control module is installed on the outside of the main unit housing. It is used to generate adjustment instructions and coordinated control instructions based on the residual chlorine concentration signal. The adjustment instructions are output to the electrolysis parameter control module, and the coordinated control instructions are output to the primary purification module.

[0005] The above solution achieves the synergistic effect of multiple chlorine reduction mechanisms through the pre-reduction of the primary purification module, the inhibition of chlorine evolution by the electrolytic purification module, and the closed-loop regulation of the synergistic chlorine reduction control module. This effectively solves the problem that a single control method is difficult to cope with complex water quality changes and ensures that the residual chlorine concentration in the effluent remains stable within a safe range.

[0006] Furthermore, the primary purification module includes a residual chlorine adsorption module and an influent water control module; The residual chlorine adsorption module receives the incoming water from the food purifier and removes the free residual chlorine in the incoming water through adsorption or reduction reactions to obtain water with low residual chlorine load. The influent control module receives a coordinated control command and adjusts the flux parameters of the influent through the residual chlorine adsorption module based on the coordinated control command to obtain a flux adjustment result corresponding to the current residual chlorine concentration of the influent. The flux parameters include the influent flow rate and flow velocity.

[0007] The above solution achieves dynamic matching of pre-purification efficiency through an influent flux adaptation and control component, and addresses the risk of high residual chlorine through a circulating purification mechanism. By extending the contact time between high residual chlorine water and the purification medium, and optimizing the flow efficiency of normal water quality, it ensures the pre-chlorination effect without adding extra purification time, stabilizing the influent water quality from the source, significantly improving the equipment's adaptability to various water usage scenarios, and ensuring the stable operation of subsequent electrolytic purification stages.

[0008] Furthermore, the residual chlorine adsorption module includes a residual chlorine reduction module, an influent residual chlorine detection module, and a concentration adaptation and control module; The residual chlorine reduction module reduces the concentration of free residual chlorine in the influent through a residual chlorine reduction mechanism to obtain low residual chlorine load water. The residual chlorine reduction mechanism includes at least an electrochemical reduction mechanism and a physical adsorption reduction mechanism. The influent residual chlorine detection module detects the residual chlorine concentration in the influent and obtains the influent residual chlorine concentration level. The concentration adaptation and control module selects a matching residual chlorine reduction mechanism based on the influent residual chlorine concentration level to obtain low residual chlorine load water; The residual chlorine reduction mechanism is as follows: When the residual chlorine concentration in the influent is higher than the high concentration threshold, the electrochemical reduction mechanism is activated first; when the residual chlorine concentration in the influent is lower than the low concentration threshold, the physical adsorption reduction mechanism is activated. When the residual chlorine concentration in the influent is between the low concentration threshold and the high concentration threshold, both the electrochemical reduction mechanism and the physical adsorption reduction mechanism are activated simultaneously.

[0009] This solution automatically switches the dechlorination method based on the residual chlorine concentration of the influent. High-concentration water sources rely on electrochemical reduction for rapid dechlorination, while low-concentration water sources use physical adsorption to save energy. It can meet the needs of commercial equipment for long-term continuous operation and high-load dechlorination, and is also suitable for the intermittent daily use in households. While ensuring the dechlorination effect, it slows down the consumption rate of consumables such as activated carbon and copper-zinc alloy, extends the replacement cycle of consumables, and effectively reduces the later operation and maintenance costs of the equipment.

[0010] Furthermore, the residual chlorine adsorption module also includes a media life monitoring module, which monitors the residual chlorine reduction efficiency of the reduction medium and determines the saturation state of the reduction medium. When the reduction medium is saturated, a reduction medium replacement prompt signal is generated.

[0011] Furthermore, the collaborative chlorine reduction control module includes a comparison database storage module and a parameter mapping module; The comparison database storage module internally stores a multi-source comparison database and outputs the multi-source comparison database to the parameter mapping module as the input basis for multi-source collaborative decision-making. The parameter mapping module performs multi-source collaborative decision-making based on the residual chlorine concentration signal and multi-source comparison database to obtain the target electrolysis parameters, and sends the target electrolysis parameters as adjustment commands to the electrolysis parameter control module.

[0012] Furthermore, the multi-source comparison database includes: A primary purification comparison database stores comparative data on residual chlorine concentration before and after treatment by the primary purification module, and obtains primary purification comparison results. A current control comparison database stores comparative data on residual chlorine concentration under different current density conditions to obtain current control comparison results; An electrode coating comparison database stores comparative data on residual chlorine concentration under different electrode coating conditions, and provides comparative results of electrode coatings.

[0013] The above solution covers the operational status of the equipment's front-end purification, core electrolysis unit, and key components. Addressing common issues such as slow electrode aging in household equipment, accelerated coating wear due to high current operation in commercial equipment, and frequent fluctuations in residual chlorine in the influent, it avoids deviations caused by single-parameter control, enabling the equipment to develop reasonable control strategies under various complex operating conditions and effectively improving the overall operational stability.

[0014] Furthermore, the collaborative chlorine reduction control module also includes a deviation determination module; The deviation determination module calculates the residual chlorine concentration deviation value based on the residual chlorine concentration signal. The residual chlorine concentration deviation value is the difference between the residual chlorine concentration signal and the preset target concentration value. Based on the residual chlorine concentration deviation value, multi-level threshold judgment is performed. When the residual chlorine concentration deviation value is greater than the first deviation value, it is determined that the current residual chlorine concentration is at an emergency risk level and an emergency risk determination result is obtained. Based on the emergency risk determination result, the electrolysis parameter control module is controlled to reduce the output current density. When the residual chlorine concentration deviation value is greater than the second deviation value but not greater than the first deviation value, the current residual chlorine concentration is determined to be at the intervention risk level and the intervention risk determination result is obtained. Based on the intervention risk determination result, the effective electrolysis area is reduced. When the residual chlorine concentration deviation value is not greater than the second deviation value, the current residual chlorine concentration is determined to be at a safe level and a safety determination result is obtained. Based on the safety determination result, the current density is maintained or increased. When the residual chlorine concentration deviation value is continuously greater than the third deviation value, it is determined that the current residual chlorine concentration is at a continuous risk level and a continuous risk determination result is obtained. Based on the continuous risk determination result, the primary purification module is started to perform cyclic purification treatment. The third deviation value is greater than the first deviation value, and the first deviation value is greater than the second deviation value.

[0015] The above solution sets multiple threshold levels, classifying different risk levels according to the degree of residual chlorine exceedance and matching them with differentiated control strategies. For slight exceedances, the electrolysis area is slightly adjusted; for moderate exceedances, the current density is reduced to inhibit chlorine evolution; and for severe exceedances, circulating purification is activated as a backup. This tiered control mode ensures food purification efficiency, controls equipment energy consumption, stabilizes residual chlorine in the effluent within a safe range, and is adaptable to different water quality standards.

[0016] Furthermore, the electrolytic purification module includes: The chlorine precipitation inhibition coating module receives low residual chlorine load water and electrolysis parameters and operates under power to suppress the chlorine precipitation side reaction during the electrolysis process, generating electrolyzed purified water with reduced residual chlorine generation. The collaborative purification output module, based on the electrolytic purification effect and the inhibition of chlorine evolution side reaction, reduces the amount of residual chlorine generated during electrolysis while maintaining the electrolytic purification efficiency, and outputs the electrolyzed purified water to the residual chlorine concentration sensing module.

[0017] A control method for a food purifier with an intelligent residual chlorine reduction system includes: S101, The primary purification module performs residual chlorine reduction treatment on the influent to reduce the concentration of free residual chlorine in the influent and obtain low residual chlorine load water; S102, based on the low residual chlorine load water and the current electrolysis parameters, electrolysis purification treatment is performed through the electrolysis purification module. During the electrolysis process, the chlorine evolution side reaction is suppressed to reduce the amount of residual chlorine generated, thereby obtaining electrolyzed purified water. S103, The residual chlorine concentration in the electrolyzed purified water is detected by the residual chlorine sensor to obtain the residual chlorine concentration signal; S104, calculate the residual chlorine concentration deviation value based on the residual chlorine concentration signal. The residual chlorine concentration deviation value is the difference between the residual chlorine concentration signal and the preset target concentration value. Perform multi-level threshold judgment based on the residual chlorine concentration deviation value and generate corresponding collaborative control instructions: when the residual chlorine concentration deviation value is greater than the first deviation value, determine that the current residual chlorine concentration is at an emergency risk level and control the current control system to reduce the current density; when the residual chlorine concentration deviation value is greater than the second deviation value but not greater than the first deviation value, determine that the current residual chlorine concentration is at an intervention risk level and reduce the effective electrolysis area; when the residual chlorine concentration deviation value is not greater than the second deviation value, determine that the current residual chlorine concentration is at a safe level and maintain or increase the current density; when the residual chlorine concentration deviation value is continuously greater than the third deviation value, determine that the current residual chlorine concentration is at a continuous risk level and start the primary purification module for cyclic purification. The third deviation value is greater than the first deviation value, and the first deviation value is greater than the second deviation value. S105, based on the residual chlorine concentration signal, the multi-level threshold judgment result and the multi-source comparison database, the controller performs multi-source collaborative decision-making to obtain the target electrolysis parameters, and outputs the target electrolysis parameters as adjustment instructions to the current control system, while simultaneously outputting the collaborative control instructions to the primary purification module; S106, Based on the adjustment command, the electrolysis parameters are dynamically adjusted through the current control system to obtain the adjusted electrolysis parameters as the current electrolysis parameters, and the process returns to the step of performing the electrolysis purification treatment for iteration; S107, when the electrolysis time reaches the preset electrolysis duration, the electrolysis purification process is stopped, and the drain valve is opened to discharge the electrolyzed purified water.

[0018] This invention provides a food purifier with an intelligent residual chlorine reduction system. The primary purification module reduces residual chlorine in the incoming water, lowering the chloride ion load on the electrolytic purification module. A low chlorine evolution potential functional coating on the surface of the electrolytic purification module suppresses side reactions by utilizing the competitive relationship between oxygen and chlorine evolution reactions. A collaborative chlorine reduction control module dynamically adjusts electrolysis parameters based on real-time residual chlorine concentration signals and multi-source mapping relationships. These multiple mechanisms work synergistically, from source reduction and process suppression to end-point control, achieving precise control of residual chlorine concentration throughout the entire process. This solves the problems of high residual chlorine and limited control methods in existing electrolytic purification technologies, significantly improving the safety of food purification while ensuring high purification efficiency. Attached Figure Description

[0019] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings; Figure 1 This is a flowchart of the intelligent residual chlorine reduction system of the present invention; Figure 2 This is a flowchart of the media lifetime monitoring module of the present invention; Figure 3 This is a flowchart of the deviation determination module of the present invention; Figure 4 This is a flowchart of the control method for the intelligent residual chlorine reduction system of the present invention. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] like Figures 1 to 4As shown, this embodiment provides a food purifier with an intelligent residual chlorine reduction system, comprising a main unit housing, a purification chamber, a water inlet valve, a drain valve, a power supply unit, and the intelligent residual chlorine reduction system. The specific structures and connections of the main unit housing, purification chamber, water inlet valve, drain valve, and power supply unit are existing technologies and will not be described in detail here. The innovation of this invention lies in the intelligent residual chlorine reduction system. The intelligent residual chlorine reduction system includes a primary purification module, an electrolytic purification module, a residual chlorine concentration sensing module, an electrolytic parameter control module, and a collaborative chlorine reduction control module. The primary purification module is installed on the water inlet side of the purification chamber, the electrolytic purification module is installed inside the purification chamber, the residual chlorine concentration sensing module is installed at the bottom of the purification chamber, and the electrolytic parameter control module and the collaborative chlorine reduction control module are both installed on the outside of the main unit housing. The water circuit of the equipment runs through the purification chamber and connects to the purification modules at each level. The power supply unit supplies power to all components of the machine. In terms of electrical connection, the residual chlorine concentration sensing module transmits the residual chlorine detection signal to the collaborative chlorine reduction control module. The collaborative chlorine reduction control module outputs instructions to the electrolysis parameter control module and the primary purification module respectively. The electrolysis parameter control module then sends the electrolysis parameters to the electrolysis purification module. The inlet valve and outlet valve are located at the inlet and outlet of the water circuit of the whole machine respectively, and are used to control the water flow and discharge. All components work together to achieve water purification and intelligent control of residual chlorine.

[0023] Specifically, the primary purification module, installed on the inlet side of the purification chamber, receives the incoming water from the food purifier and performs residual chlorine reduction treatment to lower the concentration of free residual chlorine in the incoming water, obtaining low residual chlorine load water. In this embodiment, low residual chlorine load water refers to water whose free residual chlorine concentration has been significantly reduced after pretreatment, effectively reducing the processing load on the subsequent electrolytic purification module. The primary purification module includes a residual chlorine adsorption module and an inlet water control module. The residual chlorine adsorption module receives the incoming water from the food purifier and removes free residual chlorine from the incoming water through adsorption or reduction reactions, reducing the free residual chlorine concentration to obtain low residual chlorine load water. The inlet water control module receives collaborative control commands and adjusts the flux parameters of the incoming water passing through the residual chlorine adsorption module based on these commands, obtaining a flux adjustment result corresponding to the current inlet water residual chlorine concentration. These flux parameters include the inlet water flow rate and velocity. Specifically, when the collaborative chlorine reduction control module determines that the inlet water residual chlorine concentration is high, the inlet water control module reduces the water flow velocity by adjusting the valve opening to prolong the contact time between the water and the adsorption medium.

[0024] Furthermore, the primary purification module also includes a residual chlorine adsorption module, a residual chlorine reduction module, an influent residual chlorine detection module, and a concentration adaptation and control module. The residual chlorine reduction module lowers the concentration of free residual chlorine in the influent through a residual chlorine reduction mechanism, obtaining low residual chlorine load water. This residual chlorine reduction mechanism includes at least an electrochemical reduction mechanism and a physical adsorption reduction mechanism. The influent residual chlorine detection module detects the residual chlorine concentration in the influent to obtain the influent residual chlorine concentration level. The concentration adaptation and control module selects a matching residual chlorine reduction mechanism based on the influent residual chlorine concentration level, wherein the high concentration and low concentration thresholds are set according to actual operating conditions.

[0025] Specifically, when the initial concentration of residual chlorine in the influent is higher than the high-concentration threshold, the copper-zinc alloy reaction medium is preferentially activated for electrochemical reduction to achieve high-concentration water. When the initial concentration of residual chlorine in the influent is lower than the low-concentration threshold, activated carbon filtration medium is activated for physical adsorption to achieve low-concentration water. The high-concentration threshold can be set at 1.2 mg / L or 1.5 mg / L, and the low-concentration threshold can be set at 0.2 mg / L or 0.4 mg / L. This tiered treatment strategy reflects the system's intelligence, automatically matching the optimal treatment method based on the actual pollution load, extending the lifespan of the expensive media while ensuring treatment effectiveness. The electrochemical reduction mechanism is achieved through the copper-zinc alloy reaction medium. The copper-zinc alloy particle packing layer is filled with copper-zinc alloy particles. When influent containing free residual chlorine flows through this packing layer, it triggers an electrochemical oxidation-reduction reaction. Copper acts as the cathode, receiving electrons and driving the reduction and conversion of free residual chlorine, while zinc acts as the anode, participating in the electron transfer process to convert the highly oxidizing free residual chlorine into non-oxidizing chloride ions. The physical adsorption reduction mechanism removes free residual chlorine from water through the highly porous structure of activated carbon filter media. It should be understood that other filter media, such as ion exchange resins and reverse osmosis membranes, can also be used for residual chlorine reduction, as long as they can reduce the concentration of free residual chlorine in the influent.

[0026] Furthermore, such as Figure 2As shown, the residual chlorine adsorption module also includes a media life monitoring module. This module monitors the residual chlorine reduction efficiency of the reduction media in the residual chlorine reduction module. When the residual chlorine reduction efficiency is lower than the effective efficiency threshold, it determines that the corresponding reduction media is saturated and generates a reduction media replacement prompt signal. The effective efficiency threshold refers to the lower limit of the removal efficiency of the reduction media for free residual chlorine in the influent under normal operating conditions. When the actual removal efficiency of the reduction media drops below this lower limit, it indicates that the media has lost its effective reduction capacity. Specifically, the media life monitoring module detects the residual chlorine content C0 in the tap water through the influent residual chlorine detection module, where C0 is the free residual chlorine concentration in the influent before entering the residual chlorine reduction module, in mg / L. Simultaneously, it detects the residual chlorine content C1 in the water after primary purification, where C1 is the free residual chlorine concentration in the influent after being reduced by the residual chlorine reduction module, in mg / L. Based on C0 and C1, the residual chlorine removal rate η of the primary purification module is calculated as η = (C0 - C1) / C0, where η is the proportion of free residual chlorine removed by the reduction medium in the influent, reflecting the actual reduction capacity of the reduction medium. When η is lower than the effective efficiency threshold, the reduction medium is considered saturated, and the media life monitoring module issues a filter replacement alarm to prompt the user to replace the corresponding reduction medium in time, avoiding insufficient residual chlorine reduction due to media saturation and failure, which would increase the processing burden on the subsequent electrolytic purification module. The effective efficiency threshold can be set to 90%, meaning that when the residual chlorine removal rate of the primary purification module drops below 90%, the reduction medium is considered to be approaching saturation and needs replacement. When η is not lower than the effective efficiency threshold, it indicates that the reduction medium is still in an effective working state, and the system continues to operate normally and enter the next electrolytic purification process.

[0027] Next, the low residual chlorine load water is further purified using an electrolytic purification module installed inside the purification chamber. This module performs electrolytic purification on the low residual chlorine load water based on the water's parameters and electrolysis parameters. During electrolysis, it suppresses chlorine evolution side reactions to reduce residual chlorine generation, resulting in electrolyzed purified water. The electrolytic purification module includes a chlorine evolution inhibition coating module and a co-purification output module. The chlorine evolution inhibition coating module receives the low residual chlorine load water and electrolysis parameters and operates under power to suppress chlorine evolution side reactions during electrolysis, generating electrolyzed purified water with reduced residual chlorine generation. The co-purification output module, based on the electrolytic purification effect and the inhibition of chlorine evolution side reactions, maintains electrolytic purification efficiency while controlling the residual chlorine generation within the residual chlorine generation limit, and outputs the electrolyzed purified water to the residual chlorine concentration sensing module.

[0028] The chlorine evolution suppression coating module inhibits the chlorine evolution side reaction through a low-chlorine-production synergistic functional coating. On the electrode surface, the oxygen evolution reaction and the chlorine evolution reaction occur simultaneously and compete with each other. The low-chlorine-production synergistic functional coating possesses a difference in electrochemical characteristics—high oxygen evolution potential and low chlorine evolution potential—which enhances the competitive advantage of the oxygen evolution reaction and inhibits the oxidation reaction of chloride ions on the electrode surface, resulting in electrolyzed purified water with reduced residual chlorine generation. As a preferred embodiment, the low-chlorine-production synergistic functional coating includes a boron-doped diamond thin film coating. It should be understood that the coating can also be a lead dioxide coating, an antimony-doped tin dioxide coating, or other materials with similar electrochemical characteristics, as long as they can effectively increase the potential difference between the oxygen evolution reaction and the chlorine evolution reaction.

[0029] The residual chlorine concentration sensing module, installed at the bottom of the purification chamber, is used to detect the residual chlorine concentration in the electrolyzed purified water and generate a corresponding residual chlorine concentration signal. Specifically, the residual chlorine concentration sensing module can use an electrochemical sensor or an optical sensor, which can convert the concentration value of residual chlorine in the water into an electrical signal and transmit it to the coordinated chlorine reduction control module as a decision-making basis.

[0030] An electrolysis parameter control module, installed on the outside of the main unit housing, receives adjustment commands and dynamically adjusts the electrolysis parameters based on these commands. These electrolysis parameters include at least current density, electrolysis time, and effective electrolysis area. The adjusted electrolysis parameters are then output to the electrolysis purification module. The electrolysis parameter control module includes an adjustable power supply and a closed-loop control submodule. The closed-loop control submodule is electrically connected to the adjustable power supply and controls the output duty cycle or voltage amplitude of the adjustable power supply using pulse width modulation to achieve precise adjustment of the electrolysis current density.

[0031] The electrolysis parameter control module implements the above dynamic adjustment process through a closed-loop control algorithm. The closed-loop control algorithm receives the target current density parameter from the adjustment command sent by the coordinated chlorination reduction control module, compares the actual operating current density of the electrolysis purification module with the target current density parameter to obtain a current deviation signal, calculates the output control signal based on the current deviation signal, and obtains the dynamically adjusted electrolysis output current so that the actual operating current density of the electrolysis purification module converges to the target current density parameter.

[0032] Specifically, the closed-loop control algorithm used in this embodiment preferably employs a PID control algorithm. The core logic of this algorithm lies in continuously correcting the deviation between the actual output and the target value through a negative feedback mechanism. Its specific steps include: First, real-time acquisition of the actual operating current density of the electrolysis purification module. This acquisition process can be achieved through a Hall sensor or a sampling resistor. The acquired analog signal is then input to the control unit after analog-to-digital conversion. Second, the difference between the acquired actual operating current density and the target current density parameter received from the coordinated chlorination control module is calculated to obtain a current deviation signal. This current deviation signal reflects the degree of deviation between the current electrolysis state and the desired state. Subsequently, the control unit performs proportional, integral, and derivative operations on the current deviation signal according to the calculation formula of the PID algorithm to generate a corresponding control signal. The proportional component is used for rapid response to deviation, the integral component is used to eliminate steady-state error, and the derivative component is used to predict the deviation change trend and suppress overshoot. Finally, the control signal is output to the drive circuit of the adjustable power supply, adjusting the output voltage or duty cycle of the adjustable power supply, thereby changing the operating voltage across the electrolysis purification module and thus regulating the current density flowing through the electrodes. Through continuous iteration of the above process, the actual operating current density will gradually approach and eventually converge to the target current density parameter, achieving precise control of the electrolysis process. Compared with traditional open-loop control, this closed-loop control method has the advantages of strong anti-interference ability and high control accuracy. It can effectively offset current fluctuations caused by water temperature changes, electrode aging, or water quality fluctuations, ensuring that the electrolysis purification process is always in the optimal operating range.

[0033] The electrolysis parameter control module adjusts the electrolysis time through a timed control mechanism. The collaborative chlorine reduction control module calculates the target electrolysis time parameter based on historical purification data from a multi-source comparison database, the current residual chlorine concentration signal, and water quality parameters. This target electrolysis time parameter is then output to the electrolysis parameter control module as part of the adjustment command. The electrolysis parameter control module has an internal timing unit that starts timing when the electrolysis purification module starts running, accumulating the module's working time in real time. When the accumulated working time reaches the target electrolysis time parameter, a stop signal is generated and output to the electrolysis purification module to terminate the electrolysis purification process. The target electrolysis time parameter is not a fixed value but is dynamically adjusted based on the real-time residual chlorine concentration. When the residual chlorine concentration deviation is large, the electrolysis time is appropriately extended to ensure sufficient purification; when the residual chlorine concentration is within a safe level, the electrolysis time is shortened to avoid over-electrolysis and a secondary increase in residual chlorine.

[0034] The electrolysis parameter control module adjusts the effective electrolysis area through an electrode area switching mechanism. The electrolysis purification module includes multiple independently controllable electrode groups, each corresponding to a different effective electrolysis area level. The electrolysis parameter control module receives the target electrolysis area parameter from the adjustment command sent by the coordinated chlorine reduction control module, selects the corresponding number of electrode groups to operate based on the target electrolysis area parameter, and dynamically switches the effective electrolysis area by controlling the on / off state of the power supply switches of each electrode group. When the residual chlorine concentration is at an intervention risk level, the electrolysis parameter control module reduces the number of electrode groups in operation based on the intervention risk assessment result to reduce the effective electrolysis area, thereby reducing the overall electrolysis reaction area while maintaining a constant current density, thus reducing the total amount of residual chlorine generated; when the residual chlorine concentration is at a safe level, all electrode groups are restored to operation to ensure maximum purification efficiency.

[0035] The synergistic chlorine reduction control module includes a comparison database storage module and a parameter mapping module. The comparison database storage module internally stores a multi-source comparison database, which is output to the parameter mapping module as input for multi-source synergistic decision-making. The parameter mapping module performs multi-source synergistic decision-making based on the residual chlorine concentration signal and the multi-source comparison database, obtaining the target electrolysis parameters as adjustment commands, which are then sent to the electrolysis parameter control module.

[0036] Furthermore, the electrolysis parameter control module is configured to receive a current density reduction instruction from the adjustment command when the collaborative chlorination control module determines that the residual chlorine concentration is at an emergency risk level. Based on this instruction, the module reduces the output current density to suppress residual chlorine generation during electrolysis and achieve a low current density adjustment result, such as reducing the output current by 5A to quickly suppress the chlorine evolution side reaction. This process embodies the system's safety response mechanism. When the deviation judgment module determines that the residual chlorine concentration deviation value e is greater than the first deviation value, the collaborative chlorination control module determines that the current situation is at an emergency risk level, indicating a high risk of residual chlorine exceeding the standard. After receiving the current density reduction instruction, the electrolysis parameter control module quickly adjusts the target setpoint of the PID algorithm to make it lower than the current actual operating current density. At this time, the current deviation signal is negative, the control unit outputs a control signal to reduce the current, the adjustable power supply reduces the output power, and the current density of the electrolysis purification module decreases accordingly. According to electrochemical principles, the reduction in current density directly weakens the oxidation reaction intensity on the electrode surface, thereby suppressing the side reaction of chloride ions being oxidized into residual chlorine at the source, reducing the residual chlorine generation rate, and, in conjunction with the dilution from water flow, achieving a decrease in residual chlorine concentration.

[0037] Accordingly, when the chlorine reduction control module determines that the residual chlorine concentration is within a safe level, the electrolysis parameter control module receives the maintenance current density instruction from the adjustment command. Based on the maintenance current density instruction, it maintains or increases the output current density to ensure electrolytic purification efficiency and obtain normal current density adjustment results. When the residual chlorine concentration is within a safe range, the main goal of the system shifts to ensuring purification efficiency. At this time, the electrolysis parameter control module locks the target current density parameter within the high-efficiency purification range. If the actual current density decreases due to external voltage fluctuations or load changes, the closed-loop control algorithm will automatically increase the output voltage through positive feedback adjustment, causing the current density to rise back to the target value, ensuring that the generation efficiency of active substances such as hydroxyl radicals remains at a high level, thereby ensuring the purification effect on pesticide residues and bacteria on the surface of food. Through the above differentiated adjustment strategies for different risk levels, the electrolysis parameter control module achieves a dynamic balance between purification effect and safety.

[0038] The collaborative chlorine reduction control module, installed on the outside of the main unit casing, generates adjustment and collaborative control commands based on the residual chlorine concentration signal. The adjustment commands are output to the electrolysis parameter control module, and the collaborative control commands are output to the primary purification module. This module outputs adjustment commands to the electrolysis parameter control module to drive dynamic adjustment of electrolysis parameters, and collaborative control commands to the primary purification module to drive adaptive control of pre-treatment residual chlorine reduction. Through this multi-source collaborative mechanism of pre-treatment residual chlorine reduction, electrolytic chlorine suppression, and dynamic adjustment of electrolysis parameters, the residual chlorine concentration in the food purifier is maintained within a preset safe range. Specifically, the collaborative chlorine reduction control module has preset safety thresholds and strategy models. Upon receiving a signal from the residual chlorine concentration sensing module, it determines the current water quality status and makes a comprehensive decision: whether to adjust the electrolysis intensity, activate the pre-treatment purification cycle, or maintain the current state, thereby achieving intelligent closed-loop control.

[0039] The multi-source comparison database includes a primary purification comparison database, a current control comparison database, and an electrode coating comparison database. The primary purification comparison database stores comparative data on residual chlorine concentration before and after treatment by the primary purification module, obtaining primary purification comparison results. The current control comparison database stores comparative data on residual chlorine concentration under different current density conditions, obtaining current control comparison results. The electrode coating comparison database stores comparative data on residual chlorine concentration under different electrode coating conditions, obtaining electrode coating comparison results. These three databases provide data support for multi-source collaborative decision-making from three dimensions: the reduction effect of pre-purification, the effect of current density regulation, and the inhibition effect of electrode coating.

[0040] like Figure 3As shown, the collaborative chlorine reduction control module also includes a deviation judgment module. The deviation judgment module calculates the residual chlorine concentration deviation value e based on the residual chlorine concentration signal, where e is the difference between the residual chlorine content C in the water and the preset target concentration value T, i.e., e=CT. C is the residual chlorine content in the water detected by the residual chlorine concentration sensing module, in mg / L, and T is the system's preset safe target value for residual chlorine concentration, in mg / L. For example, T can be set to 0.10 mg / L. This value is designed with reference to GB5749-2022 "Standards for Drinking Water Quality". The national standard requires a minimum free residual chlorine content of 0.05 mg / L in the end of the pipe network. 0.10 mg / L is slightly higher than the national standard minimum limit, ensuring that the water body has basic antibacterial capabilities, while being far lower than the conventional residual chlorine content of 0.3 mg / L in water leaving the water plant, minimizing residual chlorine and preventing chlorine taste from affecting the taste of food. The target concentration of this equipment can be adjusted according to the usage scenario: if high requirements are placed on the flavor of the food, it can be set to 0.08 mg / L to further reduce residual chlorine; if the ambient temperature is high, the water is prone to microbial growth, or it is used in general commercial cleaning scenarios, it can be set to 0.15 mg / L to enhance the antibacterial effect. However, the value should not be lower than 0.05 mg / L, otherwise it will not meet the national standard requirements for antibacterial treatment of end-use water; nor should it be higher than 0.20 mg / L to prevent excessive residual chlorine from producing a noticeable odor. The deviation judgment module performs multi-level threshold judgments based on the residual chlorine concentration deviation value 'e': When the residual chlorine concentration deviation value 'e' is greater than the first deviation value, the current residual chlorine concentration is determined to be at an emergency risk level, and an emergency risk judgment result is obtained. Based on the emergency risk judgment result, the electrolysis parameter control module is controlled to reduce the output current density. When the residual chlorine concentration deviation value 'e' is greater than the second deviation value but not greater than the first deviation value, the current residual chlorine concentration is determined to be at an intervention risk level, and an intervention risk judgment result is obtained. Based on the intervention risk judgment result, the effective electrolysis area is reduced. When the residual chlorine concentration deviation value 'e' is not greater than the second deviation value, the current residual chlorine concentration is determined to be at a safe level, and a safe judgment result is obtained. Based on the safe judgment result, the current density is maintained or increased. When the residual chlorine concentration deviation value 'e' is continuously greater than the third deviation value, the current residual chlorine concentration is determined to be at a continuous risk level, and a continuous risk judgment result is obtained. Based on the continuous risk judgment result, the primary purification module is activated for cyclic purification treatment. The third deviation value is greater than the first deviation value, and the first deviation value is greater than the second deviation value. The first deviation value and the first deviation value being greater than the second deviation value are all set comprehensively based on GB5749-2022 "Standards for Drinking Water Quality" and the food purification usage scenario.The second deviation value is set at 0.50 mg / L, corresponding to a measured free residual chlorine concentration of 0.60 mg / L in the electrolyzed water. This concentration is still within the national standard's allowable range, but it exceeds the comfortable range for daily water use, resulting in a slight chlorine odor. Therefore, it is set as the dividing point between the safety level and the intervention risk level, and is only moderately controlled by reducing the effective electrolysis area. The first deviation value is set at 1.00 mg / L, corresponding to a measured free residual chlorine concentration of 1.10 mg / L in the effluent. The residual chlorine odor is obvious and will significantly affect the taste of food. Therefore, it is set as the dividing point between the intervention risk level and the emergency risk level, and the side reaction of electrolytic chlorine removal is suppressed by reducing the current density. The third deviation value is set at 4.00 mg / L, corresponding to a measured free residual chlorine concentration of 4.10 mg / L in the effluent. This exceeds the national standard's maximum limit of 4.0 mg / L for free residual chlorine in drinking water, which is a serious exceedance. Therefore, it is used as the continuous risk assessment threshold. Once triggered, the system will circulate and purify the water to ensure that the effluent quality meets the national drinking water standards. Of course, different deviation values ​​are adapted according to the standards of different regions. For example, when the equipment is exported, the WHO's "Guidelines for Drinking Water Quality" stipulates 5.00 mg / L as the third deviation value.

[0041] The coordinated operation of the above modules—the primary purification module reducing reactant supply at the source, the electrolytic purification module suppressing side reactions during the process, and the coordinated chlorine reduction control module dynamically adjusting based on real-time feedback at the end—overcomes the limitations of traditional single-control methods and ensures that the residual chlorine concentration in the final effluent remains stable within a safe range.

[0042] like Figure 4 As shown, this embodiment also provides a control method for a food purifier with an intelligent residual chlorine reduction system, including the following steps: The primary purification module performs residual chlorine reduction treatment on the influent, lowering the concentration of free residual chlorine and obtaining water with a low residual chlorine load. This step reduces the free residual chlorine in the influent at the source, reducing the treatment load for subsequent electrolytic purification.

[0043] Based on the low residual chlorine load water and the current electrolysis parameters, electrolytic purification is performed through an electrolytic purification module. During electrolysis, the chlorine evolution side reaction is suppressed to reduce residual chlorine generation, resulting in electrolyzed purified water. This step utilizes a low-chlorine-production synergistic functional coating to suppress the chlorine evolution side reaction, reducing residual chlorine generation while ensuring purification efficiency.

[0044] The residual chlorine concentration in the electrolyzed purified water is detected by a residual chlorine sensor to obtain a residual chlorine concentration signal. This step provides real-time feedback signals for subsequent collaborative decision-making and threshold judgment, and is the data foundation for the entire closed-loop control.

[0045] The residual chlorine concentration deviation is calculated based on the residual chlorine concentration signal. This deviation is the difference between the residual chlorine concentration signal and the preset target concentration value. Based on the residual chlorine concentration deviation, multi-level threshold judgments are executed, and corresponding collaborative control commands are generated: When the residual chlorine concentration deviation is greater than the first deviation value, the current residual chlorine concentration is determined to be at an emergency risk level, and the current control system is controlled to reduce the current density. When the residual chlorine concentration deviation is greater than the second deviation value but not greater than the first deviation value, the current residual chlorine concentration is determined to be at an intervention risk level, and the effective electrolysis area is reduced. When the residual chlorine concentration deviation is not greater than the second deviation value, the current residual chlorine concentration is determined to be at a safe level, and the current density is maintained or increased. When the residual chlorine concentration deviation is continuously greater than the third deviation value, the current residual chlorine concentration is determined to be at a sustained risk level, and the primary purification module is activated for cyclic purification. The third deviation value is greater than the first deviation value, and the first deviation value is greater than the second deviation value. This step determines the risk level according to the magnitude of the deviation and directly generates corresponding collaborative control commands, achieving a graded response that prioritizes the suppression of residual chlorine generation during emergency risks, moderately reduces electrolysis intensity during intervention risks, ensures purification efficiency during safe levels, and activates cyclic purification during sustained risks.

[0046] Based on residual chlorine concentration signals, multi-level threshold judgment results, and a multi-source comparison database, the controller performs multi-source collaborative decision-making to obtain target electrolysis parameters. These target electrolysis parameters are then output as adjustment commands to the current control system, while collaborative control commands are simultaneously output to the primary purification module. This step integrates data from three dimensions—pre-purification, current density regulation, and electrode coating inhibition—and combines them with risk level assessment results to determine the optimal electrolysis parameters and control strategy, achieving coordinated linkage between source reduction and end-of-pipe regulation.

[0047] Based on the adjustment command, the electrolysis parameters are dynamically adjusted through the current control system. The adjusted electrolysis parameters are then used as the current electrolysis parameters, and the process returns to the electrolysis purification step for iteration. This step continuously optimizes the electrolysis parameters through closed-loop iteration, ensuring that the electrolysis purification process continuously converges to the target operating state.

[0048] When the electrolysis time reaches the preset duration, the electrolysis purification process is stopped, and the drain valve is opened to discharge the electrolyzed purified water. This step discharges the qualified water after the purification cycle is completed, thus ending one food purification cycle.

[0049] To verify the actual effectiveness of the intelligent residual chlorine reduction system provided by this invention, the applicant conducted multiple sets of comparative experiments. The experimental environment was set as a typical household kitchen scenario, with the water temperature controlled at around 25 degrees Celsius, and municipal tap water used as the experimental water source.

[0050] The pre-treatment reduction effect of the primary purification module was verified. The average initial free residual chlorine concentration of municipal tap water was 1.602 mg / L. After treatment by the primary purification module, the average free residual chlorine concentration of the effluent was significantly reduced to 0.037 mg / L, with the primary purification module achieving an average removal rate of up to 98% for free residual chlorine in the tap water. This data verifies the effectiveness of the micro-battery effect of copper-zinc alloy particles: when the influent flows through the copper-zinc alloy particle packing layer, copper acts as the cathode and zinc as the anode, forming numerous micro-galvanic cells. Through electrochemical oxidation-reduction reactions, the highly oxidizing free residual chlorine is converted into non-oxidizing chloride ions, reducing the raw material supply for electrolytic side reactions at the source.

[0051] The dynamic adjustment effect of the electrolysis parameter control module was verified. Under the same conventional electrode and electrolysis area, the average residual chlorine concentration after electrolysis at a conventional current density of 60A was 3.996 mg / L. After optimization by the synergistic chlorine reduction control module, the average residual chlorine concentration after electrolysis at a specific current density was reduced to 3.058 mg / L, a reduction of approximately 23%. This comparative experiment verified the effectiveness of the mapping relationship in the current control comparison database: by adjusting the current density, the electron transfer rate on the electrode surface was changed, thereby enhancing the competitive advantage of the oxygen evolution reaction relative to the chlorine evolution reaction.

[0052] The inhibitory effect of the low-chlorine-production synergistic functional coating on the electrolytic purification module was verified. At the same specific current density, the average residual chlorine concentration after electrolysis with conventional electrodes was 3.058 mg / L, while the average residual chlorine concentration after electrolysis with the deep-cleaning electrode coated with the low-chlorine-production synergistic functional coating was only 1.868 mg / L, a reduction of approximately 39%. This significant difference verifies the mechanism of the competitive relationship between oxygen evolution reaction (OER) and chloride evolution reaction (CER): the low-chlorine-production synergistic functional coating exhibits a difference in characteristics between high OER potential and low CER potential, resulting in a significantly higher OER kinetic rate than CER on the electrode surface, thus inhibiting the chloride ion oxidation process at the microscopic level of the electrode reaction.

[0053] Based on the experimental data above, the intelligent residual chlorine reduction system constructed in this invention achieves deep synergy between pre-treatment reduction, process suppression, and end-of-pipe regulation. The primary purification module reduces the influent residual chlorine from 1.602 mg / L to 0.037 mg / L, achieving source reduction. The electrolytic purification module further reduces residual chlorine generation by 39% through a low-chlorine-production synergistic coating, achieving process suppression. The electrolysis parameter control module optimizes current density through a closed-loop control algorithm, achieving end-of-pipe regulation. Under the combined effect of the multi-source synergistic mechanism, the residual chlorine concentration of the final effluent is effectively controlled within a safe range.

[0054] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A food purifier with an intelligent residual chlorine reduction system, comprising a main unit housing, a purification chamber, a water inlet valve, a drain valve, a power supply unit, and an intelligent residual chlorine reduction system, characterized in that, The intelligent residual chlorine reduction system includes: The primary purification module is installed on the water inlet side of the purification chamber. It receives the water from the food purification machine and performs residual chlorine reduction treatment on the water to reduce the concentration of free residual chlorine in the water and obtain low residual chlorine load water. The electrolytic purification module is installed inside the purification chamber. It is used to perform electrolytic purification treatment on water with low residual chlorine load based on the water with low residual chlorine load and the electrolysis parameters. During the electrolysis process, it suppresses the chlorine evolution side reaction to reduce the amount of residual chlorine generated and obtains electrolytic purified water. The residual chlorine concentration sensing module is installed at the bottom of the purification chamber to detect the residual chlorine concentration in the electrolyzed purified water and generate a corresponding residual chlorine concentration signal. An electrolysis parameter control module, installed on the outside of the main unit housing, is used to receive adjustment commands and dynamically adjust the electrolysis parameters based on the adjustment commands. The electrolysis parameters include at least current density, electrolysis time, and effective electrolysis area. The module also outputs the adjusted electrolysis parameters to the electrolysis purification module. The coordinated chlorine reduction control module is installed on the outside of the main unit housing. It is used to generate adjustment instructions and coordinated control instructions based on the residual chlorine concentration signal. The adjustment instructions are output to the electrolysis parameter control module, and the coordinated control instructions are output to the primary purification module.

2. A food purifier with an intelligent residual chlorine reduction system according to claim 1, characterized in that, The primary purification module includes a residual chlorine adsorption module and an inlet water control module; The residual chlorine adsorption module receives the incoming water from the food purifier and removes the free residual chlorine in the incoming water through adsorption or reduction reactions to obtain water with low residual chlorine load. The influent control module receives a coordinated control command and adjusts the flux parameters of the influent through the residual chlorine adsorption module based on the coordinated control command to obtain a flux adjustment result corresponding to the current residual chlorine concentration of the influent. The flux parameters include the influent flow rate and flow velocity.

3. A food purifier with an intelligent residual chlorine reduction system according to claim 2, characterized in that, The residual chlorine adsorption module includes a residual chlorine reduction module, an influent residual chlorine detection module, and a concentration adaptation and control module. The residual chlorine reduction module reduces the concentration of free residual chlorine in the influent through a residual chlorine reduction mechanism to obtain low residual chlorine load water. The residual chlorine reduction mechanism includes at least an electrochemical reduction mechanism and a physical adsorption reduction mechanism. The influent residual chlorine detection module detects the residual chlorine concentration in the influent and obtains the influent residual chlorine concentration level. The concentration adaptation and control module selects a matching residual chlorine reduction mechanism based on the influent residual chlorine concentration level to obtain low residual chlorine load water; The residual chlorine reduction mechanism is as follows: When the residual chlorine concentration in the influent is higher than the high concentration threshold, the electrochemical reduction mechanism is activated first; when the residual chlorine concentration in the influent is lower than the low concentration threshold, the physical adsorption reduction mechanism is activated. When the residual chlorine concentration in the influent is between the low concentration threshold and the high concentration threshold, both the electrochemical reduction mechanism and the physical adsorption reduction mechanism are activated simultaneously.

4. A food purifier with an intelligent residual chlorine reduction system according to claim 3, characterized in that, The residual chlorine adsorption module also includes a media life monitoring module, which monitors the residual chlorine reduction efficiency of the reduction medium and determines the saturation state of the reduction medium. When the reduction medium is saturated, a reduction medium replacement prompt signal is generated.

5. A food purifier with an intelligent residual chlorine reduction system according to claim 1, characterized in that, The synergistic chlorine reduction control module includes a comparison database storage module and a parameter mapping module; The comparison database storage module internally stores a multi-source comparison database and outputs the multi-source comparison database to the parameter mapping module as the input basis for multi-source collaborative decision-making. The parameter mapping module performs multi-source collaborative decision-making based on the residual chlorine concentration signal and multi-source comparison database to obtain the target electrolysis parameters, and sends the target electrolysis parameters as adjustment commands to the electrolysis parameter control module.

6. A food purifier with an intelligent residual chlorine reduction system according to claim 5, characterized in that, The multi-source comparison database includes: A primary purification comparison database stores comparative data on residual chlorine concentration before and after treatment by the primary purification module, and obtains primary purification comparison results. A current control comparison database stores comparative data on residual chlorine concentration under different current density conditions to obtain current control comparison results; An electrode coating comparison database stores comparative data on residual chlorine concentration under different electrode coating conditions, and provides comparative results of electrode coatings.

7. A food purifier with an intelligent residual chlorine reduction system according to claim 6, characterized in that, The coordinated chlorine reduction control module also includes a deviation determination module; The deviation determination module calculates the residual chlorine concentration deviation value based on the residual chlorine concentration signal. The residual chlorine concentration deviation value is the difference between the residual chlorine concentration signal and the preset target concentration value. Based on the residual chlorine concentration deviation value, a multi-level threshold judgment is performed. When the residual chlorine concentration deviation value is greater than the first deviation value, it is determined that the current residual chlorine concentration is at an emergency risk level and an emergency risk determination result is obtained. Based on the emergency risk determination result, the electrolysis parameter control module is controlled to reduce the output current density. When the residual chlorine concentration deviation value is greater than the second deviation value but not greater than the first deviation value, the current residual chlorine concentration is determined to be at the intervention risk level and the intervention risk determination result is obtained. Based on the intervention risk determination result, the effective electrolysis area is reduced. When the residual chlorine concentration deviation value is not greater than the second deviation value, the current residual chlorine concentration is determined to be at a safe level and a safety determination result is obtained. Based on the safety determination result, the current density is maintained or increased. When the residual chlorine concentration deviation value is continuously greater than the third deviation value, it is determined that the current residual chlorine concentration is at a continuous risk level and a continuous risk determination result is obtained. Based on the continuous risk determination result, the primary purification module is started to perform cyclic purification treatment. The third deviation value is greater than the first deviation value, and the first deviation value is greater than the second deviation value.

8. A food purifier with an intelligent residual chlorine reduction system according to claim 1, characterized in that, The electrolytic purification module includes: The chlorine precipitation inhibition coating module receives low residual chlorine load water and electrolysis parameters and operates under power to suppress the chlorine precipitation side reaction during the electrolysis process, generating electrolyzed purified water with reduced residual chlorine generation. The collaborative purification output module, based on the electrolytic purification effect and the inhibition of chlorine evolution side reaction, reduces the amount of residual chlorine generated during electrolysis while maintaining the electrolytic purification efficiency, and outputs the electrolyzed purified water to the residual chlorine concentration sensing module.

9. A control method for a food purifier with an intelligent residual chlorine reduction system according to any one of claims 1, 5, 7, and 8, characterized in that, include: S101, The primary purification module performs residual chlorine reduction treatment on the influent to reduce the concentration of free residual chlorine in the influent and obtain low residual chlorine load water; S102, based on the low residual chlorine load water and the current electrolysis parameters, electrolysis purification treatment is performed through the electrolysis purification module. During the electrolysis process, the chlorine evolution side reaction is suppressed to reduce the amount of residual chlorine generated, thereby obtaining electrolyzed purified water. S103, The residual chlorine concentration in the electrolyzed purified water is detected by the residual chlorine sensor to obtain the residual chlorine concentration signal; S104, calculate the residual chlorine concentration deviation value based on the residual chlorine concentration signal. The residual chlorine concentration deviation value is the difference between the residual chlorine concentration signal and the preset target concentration value. Perform multi-level threshold judgment based on the residual chlorine concentration deviation value and generate corresponding collaborative control instructions: when the residual chlorine concentration deviation value is greater than the first deviation value, determine that the current residual chlorine concentration is at an emergency risk level and control the electrolysis parameter control module to reduce the current density; when the residual chlorine concentration deviation value is greater than the second deviation value but not greater than the first deviation value, determine that the current residual chlorine concentration is at an intervention risk level and reduce the effective electrolysis area; when the residual chlorine concentration deviation value is not greater than the second deviation value, determine that the current residual chlorine concentration is at a safe level and maintain or increase the current density; when the residual chlorine concentration deviation value is continuously greater than the third deviation value, determine that the current residual chlorine concentration is at a continuous risk level and start the primary purification module for cyclic purification. The third deviation value is greater than the first deviation value, and the first deviation value is greater than the second deviation value. S105, based on the residual chlorine concentration signal, the multi-level threshold judgment result and the multi-source comparison database, the controller performs multi-source collaborative decision-making to obtain the target electrolysis parameters, and outputs the target electrolysis parameters as adjustment instructions to the electrolysis parameter control module, while the collaborative control instructions are output to the primary purification module; S106, Based on the adjustment command, the electrolysis parameters are dynamically adjusted through the electrolysis parameter control module to obtain the adjusted electrolysis parameters as the current electrolysis parameters, and the process returns to the step of performing the electrolysis purification treatment for iteration; S107, when the electrolysis time reaches the preset electrolysis duration, the electrolysis purification process is stopped, and the drain valve is opened to discharge the electrolyzed purified water.

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