Water quality monitoring and early warning system, equipment and control method thereof

Abstract

The invention discloses a water quality monitoring and early warning system, equipment and a control method thereof. The method comprises the following steps: in response to a received flushing instruction, obtaining a first water quality parameter representing the background water quality of raw water; according to the first water quality parameter, initial opening and closing parameters of the control valve body in the flushing period are determined, and the initial opening and closing parameters at least comprise one of the opening duration range and the closing duration range; and based on the initial opening and closing parameters, the control valve body is controlled to be switched between the opening state and the closing state, so that waste water is dynamically utilized. According to the invention, the technical problem of low utilization rate of flushing wastewater or excessive accumulation of pollutants in the prior art is solved, and the technical effect of improving the water-saving efficiency and the operation stability of the water quality monitoring and early warning system on the premise of guaranteeing the monitoring precision is achieved.

Description

Technical Field

[0001] This application relates to the field of water quality monitoring technology, specifically to a water quality monitoring and early warning system, equipment, and control method thereof. Background Technology

[0002] During water quality monitoring and early warning processes, monitoring sensors (such as detection modules integrating parameters like Total Organic Carbon (TOC) and Total Dissolved Solids (TDS)) need to be in continuous contact with the raw water being tested for long-term monitoring. Due to the influence of impurities or chemicals in the water, monitoring sensors are prone to contaminant adhesion, scaling of sensitive elements, or reading deviations. To maintain monitoring accuracy and perform regular sensor calibration, water quality monitoring and early warning systems typically require switching the flow path and using a fluid cleaner than the raw water (such as RO water produced after passing through a reverse osmosis filtration unit) to flush the sensors.

[0003] For example, Chinese patent CN214703593U discloses a real-time water quality monitoring and early warning device, including a housing, a detection chamber, and a circuit control box. The detection chamber is located inside the housing, and the side wall of the housing has a raw water inlet, a clean water inlet, and a drain outlet. The detection chamber is equipped with a self-priming pump, a water quality sensor, a micro-filter, a filter cartridge assembly, a residual chlorine module, a pH module, a wastewater ratio valve, and a solenoid valve assembly. The outlet of the self-priming pump is equipped with a three-way connector to divide the water flow into a detection water path and a cleaning water path. By designing independent detection and cleaning water paths, and integrating multiple types of detection modules for different water paths, the device can monitor water quality indicators in real time and effectively extend the service life of the equipment. The cleaning mode is activated only after the detection is completed.

[0004] For example, Chinese patent CN115372578A discloses a TOC sensor self-calibration method, a TOC sensor, and a water purification device. This solution achieves self-calibration by collecting water quality parameters of raw water and purified water and performing algorithm calibration, thus overcoming the data drift problem that occurs during long-term use of TOC sensors. When applied to water purification devices, it can make the water quality monitoring data of the equipment more accurate and reliable.

[0005] While the aforementioned solutions compensate for data drift through algorithms, they still have limitations in terms of physical flow path recycling management and resource utilization efficiency. Direct discharge of the fluid generated during the flushing process leads to low water resource utilization efficiency. If a fixed recycling method is used to return wastewater to the front end of the water quality monitoring and early warning system for cyclic flushing, the concentration of pollutants in the flow path will increase as the circulation process continues. Due to the lack of a mechanism that can dynamically control the physical flow direction of the flow path based on the real-time background of the raw water and the deterioration of the circulating fluid, when the circulating fluid water quality fails to meet the sensor cleanliness requirements, relying solely on software algorithm compensation is insufficient to eliminate the risk of contamination to the monitoring elements caused by pollutant accumulation.

[0006] Therefore, how to achieve dynamic and efficient recycling of wastewater generated during rinsing while ensuring the reliability of the sensor monitoring environment and the accuracy of calibration is a technical problem that needs to be solved. Summary of the Invention

[0007] The purpose of this invention is to provide a control method and device for a water quality monitoring and early warning system, so as to at least solve the technical problems of low utilization rate of flushing wastewater or excessive accumulation of pollutants during the recycling process in related technologies.

[0008] The first objective of this invention is to provide a control method for a water quality monitoring and early warning system. This system includes a raw water monitoring branch and a filtration flushing branch connected in parallel, and a water pump for supplying pressure to a filtration assembly. The raw water monitoring branch is equipped with a first switching valve, and the filtration flushing branch is equipped with a second switching valve and a filtration assembly. A first monitoring unit is located on a common flow path formed by the convergence of the raw water monitoring branch and the purified water outlet of the filtration assembly. By switching the on / off states of the first and second switching valves, the first monitoring unit can selectively receive and monitor either the raw water from the raw water monitoring branch or the purified water from the filtration assembly. Wastewater generated by the filtration assembly is connected to the suction side of the water pump via a return loop equipped with a control valve body, so that the wastewater recovery or discharge can be adjusted by the control valve body. The control method includes: in response to a received flushing command, acquiring a first water quality parameter characterizing the background water quality of the raw water; wherein the first water quality parameter includes at least one parameter index selected from total organic carbon, total dissolved solids, chemical oxygen demand, pH, conductivity, residual chlorine, temperature, and turbidity. Based on the first water quality parameter, determine the initial opening and closing parameters of the control valve body during the flushing cycle; wherein, the initial opening and closing parameters include at least the range of opening duration and / or the range of closing duration. Based on the initial opening and closing parameters, the control valve body switches between the open and closed states to dynamically utilize wastewater.

[0009] Optionally, the step of controlling the valve body to switch between an open state and a closed state specifically includes: acquiring a second water quality parameter, characterized by the real-time water quality of the purified water currently used for flushing, as measured by the first monitoring unit; wherein the second water quality parameter includes at least one parameter index selected from total organic carbon, total dissolved solids, chemical oxygen demand, pH, conductivity, residual chlorine, temperature, and turbidity; determining a target open duration within an open duration range and / or a target closed duration within a closed duration range based on the second water quality parameter; and controlling the valve body to perform state switching according to the target open duration and / or the target closed duration.

[0010] Optionally, the control valve body is controlled to switch states according to the target opening duration and / or target closing duration. Specifically, this includes: when the current state duration of the control valve body reaches the target opening duration or the target closing duration, a third water quality parameter characterizing the water quality at the current moment is acquired through the first monitoring unit; wherein, the third water quality parameter includes at least one parameter index among total organic carbon, total dissolved solids, chemical oxygen demand, pH, conductivity, residual chlorine, temperature, and turbidity; determining whether the third water quality parameter is within the preset action execution parameter range; if the third water quality parameter is within the preset action execution parameter range, the control valve body is controlled to perform the corresponding opening and closing action to complete the state switch; if the third water quality parameter is not within the preset action execution parameter range, the current state is extended for a preset compensation duration, and the third water quality parameter is reacquired when the preset compensation duration expires.

[0011] Optionally, the third water quality parameter within the preset action execution parameter range includes at least one of the following judgment conditions: the third water quality parameter is lower than a preset cleaning threshold; the fluctuation range of the third water quality parameter within a preset sampling period is less than a preset fluctuation threshold; and the change range of the third water quality parameter relative to the second water quality parameter reaches a preset improvement target value to meet the improvement conditions.

[0012] Optionally, the suction side of the water pump is provided with a second monitoring unit for real-time monitoring of a fourth water quality parameter for the background water quality of the raw water; wherein the fourth water quality parameter has the same parameter index as the first water quality parameter; the control method further includes the steps of: in response to extending the execution of the current state until the preset compensation time expires, and the change range of the third water quality parameter relative to the second water quality parameter still does not meet the improvement conditions, obtaining the deviation of the fourth water quality parameter relative to the first water quality parameter; if the ratio of the deviation to the change range is within a preset attribution ratio range, it is determined that the abnormality of the purified water quality is caused by the fluctuation of the raw water, and the extension of the current state is stopped, and the control valve body is forced to perform the opening and closing action.

[0013] Optionally, the step of obtaining a first water quality parameter characterizing the background water quality of the raw water includes: controlling the first switch valve to open and the second switch valve to close, so as to obtain the first water quality parameter through the first monitoring unit; or, obtaining the first water quality parameter through a second monitoring unit set at the front end of the water pump suction side.

[0014] Optionally, the step of controlling the control valve to switch between the open and closed states includes: acquiring real-time feedback parameters characterizing the real-time water quality of the purified water as measured by the first monitoring unit; in response to the real-time feedback parameters exceeding a preset pollution threshold, and / or the rate of increase of the real-time feedback parameters reaching a preset discharge threshold, controlling the control valve to perform an opening action to switch to the discharge state; in response to the real-time feedback parameters being lower than a preset cleanliness threshold, and / or the trend of change of the real-time feedback parameters stabilizing within a preset time period, controlling the control valve to perform a closing action to switch to the wastewater recycling state.

[0015] Another objective of this invention is to provide a water quality monitoring and early warning system, comprising: an inlet pipe and a water pump, wherein the suction side of the water pump is connected to the inlet pipe; a raw water monitoring branch and a filter flushing branch, connected in parallel to the discharge side of the water pump; the water pump is configured to provide pressure to a filter assembly in the filter flushing branch; wherein a first switching valve is provided on the raw water monitoring branch, and a second switching valve and a filter assembly are provided on the filter flushing branch; a first monitoring unit is disposed on a common flow path formed by the convergence of the raw water monitoring branch and the purified water outlet of the filter assembly, so that the first monitoring unit can selectively monitor either the raw water from the raw water monitoring branch or the purified water from the filter assembly according to the opening and closing states of the first and second switching valves; a return loop is connected between the wastewater outlet of the filter assembly and the suction side of the water pump, and a control valve body is provided thereon; and a controller is communicatively connected to the first switching valve, the second switching valve, the first monitoring unit, and the control valve body, and executes the control method as described above.

[0016] Optionally, the water quality monitoring and early warning system also includes an auxiliary monitoring branch; the inlet end of the auxiliary monitoring branch is connected to the inlet pipe upstream of the water pump suction side, and its outlet end is connected to the outlet pipe of the water quality monitoring and early warning system downstream of the first monitoring unit; wherein, the auxiliary monitoring branch is provided with a first throttling element, a pH electrode, a residual chlorine electrode and a fourth one-way valve in sequence along the water flow direction.

[0017] Optionally, a second throttling element is provided on the wastewater outlet path of the filter assembly; a third check valve is provided at the rear end of the second throttling element, which is used to block the backflow loop or the reverse flow of fluid outside the water quality monitoring and early warning system towards the filter assembly.

[0018] Optionally, it also includes: a second monitoring unit installed on the pump suction side or inlet pipe; the second monitoring unit is communicatively connected to the controller and is used to acquire a first water quality parameter characterizing the initial background of the raw water and a fourth water quality parameter characterizing the real-time background water quality of the raw water; the fourth water quality parameter has the same parameter index as the first water quality parameter.

[0019] A third objective of the present invention is to provide a water quality monitoring and early warning device, comprising: a memory for storing processor-executable instructions; a processor; wherein the processor is configured to execute a control method as described above; and hardware components required to implement the control method, the hardware components including: a water pump, a first switching valve, a second switching valve, a filter assembly, a first monitoring unit, a second monitoring unit, a control valve body, and a return loop.

[0020] Compared with the prior art, the present invention has the following advantages: The control method proposed in this application enables dynamic wastewater utilization. By linking the control valve body with the return loop and adjusting the discharge ratio through real-time feedback, it overcomes the impact of pollutant accumulation on monitoring sensors during the circulation process, resulting in more accurate monitoring data and extending the service life of sensors and filter components. Utilizing a feedforward range preset and feedback value selection strategy improves the response speed of the water quality monitoring and early warning system to water quality fluctuations. Introducing fluctuation attribution logic considers sudden changes in background water quality, effectively distinguishing between background fluctuations and decreased filtration efficiency, avoiding unrestricted discharge, and improving the water-saving efficiency and operational stability of the water quality monitoring and early warning system. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a water quality monitoring and early warning system provided in an embodiment of this disclosure; Figure 2 This is a flowchart of a water quality monitoring and early warning system control method provided in an embodiment of this disclosure; Figure 3 This is a flowchart of the steps for switching the control valve body between an open state and a closed state according to the first embodiment of this disclosure; Figure 4 This is a flowchart of the steps for switching the control valve body between an open state and a closed state according to the second embodiment of this disclosure; Figure 5 This is a flowchart of the steps for controlling the switching of the control valve body's execution state according to the target opening duration and the target closing duration provided in this embodiment of the disclosure; Figure 6 This is a flowchart of the logic for attribution determination and adaptive correction for background fluctuations provided in the embodiments of this disclosure.

[0022] In the above figures, the component names corresponding to each number are as follows: 600, Water quality monitoring and early warning system; 611, Inlet water filtration unit; 612, Third switch valve; 613, Second monitoring unit; 614, Water pump; 615, First switch valve; 616, First monitoring unit; 619, First check valve; 625, Second switch valve; 626, Filtration assembly; 627, Second check valve; 628, Second throttling element; 629, Third check valve; 631, Control valve body; 632, Reflux device; 641, First throttling element; 642, pH electrode; 643, Residual chlorine electrode; 649, Fourth check valve; 651, Fourth switch valve; 659, Fifth check valve; 691, Inlet; 692, Outlet; 694, Air inlet. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0024] It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this invention are used to distinguish different objects, rather than to limit a specific order.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0027] Example 1 like Figure 1 As shown, Figure 1 A water quality monitoring and early warning system 600 provided in this embodiment includes a water inlet 691, a water pump 614, a first monitoring unit 616, a filter assembly 626, and a return loop.

[0028] Specifically, the water quality monitoring and early warning system 600 has a raw water monitoring branch and a filter flushing branch connected in parallel on the discharge side of the water pump 614. The water pump 614 is configured to provide pressure to the filter assembly 626 in the filter flushing branch so that the filter assembly 626 can perform a pressurized filtration operation.

[0029] It should be noted that when the first switching valve 615 is open and the second switching valve 625 is closed, the fluid in the common flow path is raw water; when the first switching valve 615 is closed and the second switching valve 625 is open, the fluid in the common flow path is purified water. Optionally, a second check valve 627 is provided on the flow path where the purified water outlet A1 is located, and a first check valve 619 is provided downstream of the first monitoring unit 616 to prevent fluid backflow.

[0030] It should be noted that when the first switching valve 615 is open and the second switching valve 625 is closed, the fluid in the common flow path is raw water; when the first switching valve 615 is closed and the second switching valve 625 is open, the fluid in the common flow path is purified water. Optionally, a second check valve 627 is provided on the flow path where the purified water outlet A1 is located, and a first check valve 619 is provided downstream of the first monitoring unit 616 to prevent fluid backflow.

[0031] The filter assembly 626 has a clean water outlet A1 and a wastewater outlet A2.

[0032] It should be noted that the wastewater generated by the filter assembly 626 is discharged through wastewater outlet A2 and connected to the suction side of the water pump 614 via a return loop equipped with a control valve body 631. Specifically, the water quality monitoring and early warning system 600 regulates the amount of wastewater recovered or discharged through the control valve body 631. The flow channel connected to wastewater outlet A2 splits into two paths at the rear end: Discharge path B1: This path is equipped with a control valve body 631. When the control valve body 631 is in the open state, wastewater is discharged to the outlet 692 via discharge path B1.

[0033] Return circuit B2: This circuit is equipped with a return device 632 and is connected to the suction side of the water pump 614. It should be noted that when the control valve body 631 is in the closed state, the discharge path B1 is cut off, and the wastewater flows back to the suction side of the water pump 614 via the return circuit B2, where it merges with the raw water from the inlet pipe and re-enters the filter assembly 626 for recycling.

[0034] Optionally, a second throttling element 628 and a third check valve 629 may be provided on the path leading from wastewater outlet A2 to the branch node.

[0035] In addition, the aforementioned water quality monitoring and early warning system 600 may optionally include an auxiliary monitoring flow path and an air introduction mechanism. The inlet 691 is connected to an inlet filtration unit 611, whose outlet branches off as an auxiliary monitoring branch. This branch can be connected to the pH electrode 642, the residual chlorine electrode 643, and the fourth one-way valve 649 via the first throttling element 641. The main monitoring flow path may optionally include a third switching valve 612 and a second monitoring unit 613 for collecting raw water background parameters. The air inlet 694 is connected to the suction side of the water pump 614 via a fifth one-way valve 659 and a fourth switching valve 651.

[0036] It should be understood that, Figure 1 The structure shown is only an exemplary physical architecture, and the specific configuration of the water quality monitoring and early warning system is not subject to change. Figure 1 Due to strict limitations, the connection order, quantity, and selection of relevant components can be adjusted according to actual operating conditions without departing from the core logic of this disclosure. It should be noted that by adjusting the state of control valve 631, dynamic utilization of wastewater in the physical flow path is achieved. The above configuration of physical components is intended to illustrate the technical solution of this disclosure; the specific hardware layout and parameter settings should be flexibly configured according to actual early warning and monitoring needs.

[0037] Based on the aforementioned water quality monitoring and early warning system 600 architecture, this embodiment provides a control method for the water quality monitoring and early warning system, such as... Figure 2 As shown, it includes the following steps: S1. In response to the received flushing command, acquire the first water quality parameter characterizing the background water quality of the raw water; S2. Based on the first water quality parameter, determine the initial opening and closing parameters of the control valve body during the flushing cycle; S3. Based on the initial opening and closing parameters, control the valve body to switch between the open and closed states to dynamically utilize wastewater.

[0038] In a specific embodiment, the detailed execution logic of steps S1 to S3 above is as follows: For step S1 above, optionally, the first water quality parameter includes at least one of total organic carbon (TOC), total dissolved solids (TDS), chemical oxygen demand (COD), pH, conductivity, residual chlorine, temperature, or turbidity.

[0039] Optionally, the water quality monitoring and early warning system 600 has preset numerical ranges for characterizing fluid quality, classifying the real-time monitored water quality status into excellent, moderate, or severe levels. It should be noted that this classification provides a logical basis for the initial opening and closing parameters of the control valve body 631. Optionally, total organic carbon (TOC) is used to characterize the content of total organic matter in the fluid, and its unit can be ppm. It should be noted that the default range for this parameter can be set to 0-5 ppm. Specifically, the excellent range is 0-3 ppm, the moderate range is 3-5 ppm, and the severe range is above 5 ppm.

[0040] Total dissolved solids (TDS) characterizes the total amount of dissolved solids in a fluid, and its unit can be ppm. It should be noted that the default range for this parameter can be set to 0-1000 ppm. Specifically, the excellent range is 0-500 ppm, the moderate range is 500-1000 ppm, and the high-density range is above 1000 ppm.

[0041] Chemical oxygen demand (COD) is used to measure the content of reducing substances in a fluid, and its unit can be mg / L. It should be noted that the default range for this parameter can be set to 0-5 mg / L. Specifically, the excellent range is 0-3 mg / L, the moderate range is 3-5 mg / L, and the severe range is above 5 mg / L.

[0042] pH value is used to characterize the acidity or alkalinity of a fluid, with a range of 0-14. It should be noted that the optimal range is 6-8. Specifically, pH values ​​below 6 or above 8 are considered highly acidic.

[0043] Electrical conductivity is used to characterize the ability of a fluid to conduct electric current, and its unit is μS / cm. It should be noted that the default range for this parameter can be set to 0-6000 μS / cm. Specifically, its excellent range is 0-1000 μS / cm, the medium range is 1000-6000 μS / cm, and the high-density range is above 6000 μS / cm.

[0044] Residual chlorine is used to characterize the amount of chlorine-containing disinfectant residue in a fluid after treatment, and its unit can be ppm. It should be noted that the default range for this parameter can be set to 0-5 ppm. Specifically, its optimal range is 0.05-0.5 ppm; when the residual chlorine content is below 0.05 ppm or above 0.5 ppm, it is considered to be in the heavy chlorine range.

[0045] Temperature is used to characterize the hotness or coldness of a fluid, and its unit is °C. It should be noted that the default range for this parameter can be set to 5-50°C. Specifically, its optimal range is 5-50°C; temperatures below 5°C or above 50°C are considered to be in the heavy-duty range.

[0046] Turbidity is used to characterize the degree to which suspended particles in a fluid obstruct the transmission of light, and its unit can be NTU. It should be noted that the default range for this parameter can be set to 0-5 NTU. Specifically, the excellent range is 0-3 NTU, the moderate range is 3-5 NTU, and the heavy range is above 5 NTU.

[0047] It should be noted that the classification standards and numerical ranges of the above-mentioned water quality parameters are intended to illustrate the technical solutions of this disclosure, rather than to strictly limit the scope of protection. Specifically, in practical applications, the water quality monitoring and early warning system 600 is configured to allow users to modify the above ranges according to the characteristics of local water sources and the specific detection environment.

[0048] For step S1, obtaining the first water quality parameter can be achieved through at least one of the following two methods: As an optional implementation, the water quality monitoring and early warning system 600 controls the first switching valve 615 to open and the second switching valve 625 to close. In this state, raw water is guided to the first monitoring unit 616 via the raw water monitoring branch. It should be noted that under this condition, the raw water can flow to the first monitoring unit 616 by its own pressure, without the need for pumping by the water pump 614. Real-time monitoring values ​​are obtained by the total organic carbon (TOC) sensor built into the aforementioned first monitoring unit 616, and these real-time monitoring values ​​are confirmed as the first water quality parameter. It should be noted that the first monitoring unit 616, due to its flushing and maintenance mechanism, has an advantage in the accuracy of the TOC values ​​it obtains.

[0049] As an alternative implementation, the water quality monitoring and early warning system 600 acquires parameters through a second monitoring unit 613 located at the front end of the suction side of the water pump 614. The second monitoring unit 613 is located downstream of the third switching valve 612 and upstream of the water pump 614. Optionally, the second monitoring unit 613 is equipped only with a total dissolved solids (TDS) sensor, using its real-time measured raw TDS value as the first water quality parameter.

[0050] Optionally, in step S2, the controller determines the initial opening and closing parameters of the control valve 631 within the flushing cycle based on the acquired first water quality parameters. Specifically, the water quality monitoring and early warning system 600 has a preset fixed duration corresponding to a complete flushing cycle. It should be noted that the fixed duration refers to the total time for the control valve 631 to perform opening and closing actions in a complete flushing process.

[0051] In a preferred embodiment, the fixed duration of the rinsing cycle can be set to 60 seconds. It should be understood that 60 seconds is only a preferred embodiment of this disclosure. In practical applications, the fixed duration of the rinsing cycle is not limited to the above value and can be flexibly configured according to the volume of the water quality monitoring and early warning system 600, the filtration efficiency of the filter component 626, and the needs of the monitoring environment.

[0052] As an optional implementation, in conjunction with the foregoing embodiments, when the acquired first water quality parameter is determined to be of excellent quality, the controller determines a smaller initial start-up duration baseline value. For example, it can be set to 20 seconds to perform a high proportion of wastewater recovery through the return loop B2; when the level is determined to be medium, the controller determines a medium initial start-up duration reference value. For example, it can be set to 30 seconds; when the condition is determined to be severe, the controller determines a larger initial on-time baseline value. For example, set it to 40 seconds.

[0053] The aforementioned initial opening and closing parameters include at least the initial opening duration range. and initial shutdown duration range The general calculation formula is as follows: in, A fixed duration for a complete rinsing cycle. The initial start-up duration is the baseline value determined based on the first water quality parameter. This is a preset time fluctuation threshold.

[0054] For example, the first water quality parameter is TDS, the fixed duration of the flushing cycle can be set to 60 seconds, the water quality monitoring and early warning system 600 presets a TDS severity range of over 1000 ppm, and presets a time fluctuation threshold. The time is 10 seconds. If the TDS value of the raw water measured by the aforementioned second monitoring unit 613 is 1200 ppm, which reaches the heavy pollution range, then the controller determines... It is 40 seconds. Calculated using the formula above: In this example, the initial activation duration range The duration is 30 to 50 seconds; the initial shutdown duration range is... The duration is 10s to 50s. For step S3, during the rinsing cycle, the controller drives the aforementioned control valve 631 to perform state switching within the aforementioned defined range. During this process, the water quality monitoring and early warning system 600 simultaneously controls the first switching valve 615 to close and the second switching valve 625 to open, causing the purified water generated by the filter assembly 626 to rinse the first monitoring unit 616, while the generated wastewater switches between recovery and discharge states. It should be understood that when the first water quality parameter is in the low pollution range, the control valve 631 increases its closing time, guiding the wastewater to be recovered via the return loop B2; when the water quality load increases, the opening time is increased to perform sewage discharge. It should be noted that the above embodiment, by structurally distinguishing the first monitoring unit 616 from the initially sensed second monitoring unit 613, combined with the dynamic setting of the time range, achieves a balance between monitoring accuracy and resource utilization. The aforementioned feedforward adjustment ensures that the wastewater utilization strategy is dynamically adjusted according to the raw water background, avoiding monitoring interference that may be caused by the traditional single return mode.

[0055] In an alternative embodiment, refer to Figure 3 The process of controlling the valve body to switch between the open and closed states as described in step S3 above includes the following steps: S31. Obtain the second water quality parameter, which characterizes the real-time water quality of the purified water, as measured by the first monitoring unit; S32. In response to the real-time feedback parameter exceeding the preset pollution threshold, and / or the rate of increase of the real-time feedback parameter reaching the preset emission threshold, the control valve body is controlled to perform an opening action to switch to the emission state. S33. In response to the real-time feedback parameter being lower than the preset cleanliness threshold, and / or the change trend of the real-time feedback parameter stabilizing within a preset time, the control valve body is controlled to perform a closing action to switch to wastewater recycling state.

[0056] In a specific embodiment, the execution logic and parameterization process of steps S31 to S33 are as follows: For step S31, real-time feedback parameters characterizing the real-time water quality of the purified water are obtained by the first monitoring unit. Specifically, the first monitoring unit 616 is located on the common flow path downstream of the purified water outlet A1 of the filter assembly 626. Specifically, the real-time feedback parameters are used to reflect the quality of the fluid filtered by the filter assembly 626 in real time. It should be noted that, in the wastewater recovery state, the wastewater generated by the filter assembly 626 is introduced into the return loop B2 via the wastewater outlet A2. Specifically, the end of the return loop B2 is connected to the suction side of the water pump 614. Under this condition, the wastewater returned via the return loop B2 mixes with the raw water from the raw water pipeline in the direction of the suction side of the water pump 614. It should be noted that the water pump 614 is configured to draw in the mixed fluid and apply pressure to it, causing it to re-enter the filter assembly 626 to perform circulating filtration. This process causes the concentration of pollutants in the flow path to accumulate with the increase of the number of cycles.

[0057] Optionally, the second water quality parameter includes at least one of the following parameters: total organic carbon (TOC), total dissolved solids (TDS), chemical oxygen demand (COD), pH value, conductivity, residual chlorine, temperature, and turbidity.

[0058] Specifically, the pollutant concentration in the wastewater may show an increasing trend during the circulation process. Specifically, the first monitoring unit 616 monitors whether the purified water used to rinse the monitoring unit meets preset cleanliness standards by acquiring real-time feedback parameters. It should be noted that the aforementioned real-time feedback parameters include at least one of Total Organic Carbon (TOC), Total Dissolved Solids (TDS), conductivity, residual chlorine, or turbidity. Specifically, during the rinsing cycle, the first monitoring unit 616 acquires the above parameters at a preset sampling frequency to form a real-time water quality sequence.

[0059] For step S32, in response to the real-time feedback parameter exceeding the preset pollution threshold, and / or the rate of increase of the real-time feedback parameter reaching the preset discharge threshold, the control valve body is opened to switch to the discharge state. Specifically, the controller of the water quality monitoring and early warning system calculates the rate of increase of the real-time feedback parameter by performing real-time analysis. It should be noted that when the real-time feedback parameter tends to fall below the standard due to cyclic accumulation, the proportion of new raw water in the water quality monitoring and early warning system should be increased by discharging high-concentration wastewater to achieve dilution adjustment. Specifically, the general formula for calculating the rate of increase is as follows: in, To provide real-time feedback on the rate of increase of the parameters, These are the real-time feedback parameters at the current moment. These are the real-time feedback parameters from the previous sampling time. This is the sampling time interval. It should be noted that when the real-time feedback parameter exceeds the preset contamination threshold, or the rate of increase... When the pollutant concentration in the current flow path is greater than or equal to any of the preset emission thresholds, the controller determines that the concentration is too high or the trend of deterioration is obvious. Specifically, the controller outputs a control signal to drive the control valve 631 to open. At this time, the wastewater discharged from wastewater outlet A2 is discharged to outlet 692 via path B1, thereby blocking the pollutants from entering the water quality monitoring and early warning system 600 for circulation through the return loop B2, and new raw water is added to perform dilution.

[0060] For step S33, in response to the real-time feedback parameter being lower than the preset cleanliness threshold, and / or the trend of the real-time feedback parameter stabilizing within a preset time period, the control valve body is closed to switch to wastewater recovery mode. Specifically, the preset cleanliness threshold is lower than the aforementioned preset contamination threshold. Specifically, whether the trend is stable is determined by calculating the variance of the real-time feedback parameter within the preset time period. The general calculation formula for stability determination is as follows: in, The variance of the parameters within a preset time period. This represents the number of sampling points within that time period. For the first The parameter values ​​of each sampling point This is the average value. Specifically, when the real-time feedback parameter is less than the preset cleanliness threshold, and the variance is... When the fluid quality falls below a preset stability threshold, the controller determines that the fluid quality has recovered to a recyclable range. Specifically, the controller drives the control valve 631 to close, blocking the discharge path B1, and forcing the wastewater to be recycled through the return loop B2.

[0061] In a specific example of the above embodiments, in step S31, the first monitoring unit 616 is equipped with a TOC sensor. Specifically, the water quality monitoring and early warning system 600 has a preset sampling frequency of 1Hz, i.e., a sampling time interval. Optionally, within a preset time period after the flushing command is triggered (specifically, for example, 10 to 30 seconds after water flow), the water quality monitoring and early warning system 600 begins to acquire real-time feedback parameters characterizing the real-time water quality of the purified water. This refers to the TOC value of pure water collected in real time.

[0062] In step S32 mentioned above, the water quality monitoring and early warning system 600 has a preset pollution threshold (corresponding to pure water TOC) of 1 mg / L and a preset discharge threshold (corresponding to real-time parameter rise rate) of 0.2 mg / (L·s). Specifically, during the flushing cycle... At any given time, if the first monitoring unit 616 measures the real-time feedback parameters mg / L, and the previous second Time measured mg / L. Specifically, the controller calculates the rate of increase of the real-time feedback parameter according to a general formula: Due to the calculated rate of increase If the TOC value is greater than the preset emission threshold of 0.2 mg / (L·s), even if the current TOC value of 0.75 mg / L has not exceeded the preset pollution threshold of 1 mg / L, the water quality monitoring and early warning system 600 still determines that there is a risk of rapid deterioration of water quality and drives the control valve body 631 to perform an opening action to switch to the discharge state.

[0063] In another embodiment, in step S33 described above, in a specific numerical embodiment, the real-time feedback parameter collected by the first monitoring unit 616 is total organic carbon (TOC). Specifically, the water quality monitoring and early warning system 600 has a preset sampling frequency of 1 Hz and a preset duration of 5 seconds, i.e., n=5. The water quality monitoring and early warning system 600 has a preset stability threshold (variance threshold) of 0.02.

[0064] Specifically, the preset stability judgment time (corresponding to the number of sampling points) is 5 seconds. The real-time feedback parameters collected by the first monitoring unit 616 for 5 consecutive seconds are all below 0.5 mg / L, and the sampling value sequence within these 5 seconds is: 0.44, 0.46, 0.43, 0.43, 0.42. The variance of this sequence is calculated to be 0.000184, which is less than the preset stability threshold (0.02). Since the real-time feedback parameters are below the preset cleanliness threshold of 0.5 mg / L and the water quality trend is stable, the controller determines that the flushing effect has reached the wastewater recycling standard. Specifically, the controller outputs a control signal to drive the control valve 631 to perform a closing action, causing the wastewater to switch to the return loop B2 for recycling.

[0065] It should be noted that the above embodiments, by introducing specific parameters and formulas for calculation, achieve precise triggering of the control valve body 631, solve the problem of response lag when water quality changes abruptly, and avoid frequent valve malfunctions caused by instantaneous data fluctuations. It should also be noted that this dynamic adjustment mechanism, while improving water saving rate, ensures the monitoring accuracy of the water quality monitoring and early warning system 600 under long-term cyclic operating conditions.

[0066] In conjunction with the foregoing embodiments, refer to Figure 1as well as Figure 4 The step S3, which controls the valve body to switch between the open and closed states, specifically includes the following steps: S301. Obtain a second water quality parameter, which characterizes the real-time water quality of the purified water currently used for flushing, as measured by the first monitoring unit. S302. Based on the second water quality parameter, determine the target opening duration within the opening duration range and the target closing duration within the closing duration range; S303. Control the valve body to switch states according to the target opening duration and target closing duration.

[0067] In a specific embodiment, the execution logic and parameterization process of steps S301 to S303 are as follows: Specifically, in step S301, a second water quality parameter, characterized by the real-time water quality of the purified water currently used for rinsing, is acquired by the first monitoring unit. Specifically, during the rinsing cycle, the purified water produced by the filter assembly 626 flows to the first monitoring unit 616 via the purified water outlet A1. Specifically, the aforementioned first monitoring unit 616 has a built-in total organic carbon (TOC) sensor for real-time acquisition of the second water quality parameter of the purified water. It should be noted that in wastewater recycling mode, the wastewater discharged from the filter assembly 626 flows back to the water pump inlet side via the return loop B2, mixes with the raw water from the inlet 691, and re-enters the filter assembly 626 for circulating filtration. Specifically, because the wastewater is recycled, the pollutant concentration in the circulating water inside the water quality monitoring and early warning system 600 may show an upward trend during multiple cycles. Specifically, the first monitoring unit 616 monitors whether the purified water used for rinsing the monitoring unit meets the preset cleanliness standard by acquiring the second water quality parameter in real time.

[0068] Specifically, in step S302, based on the second water quality parameter, a target opening time is determined within the opening time range, and a target closing time is determined within the closing time range. Specifically, the controller obtains the opening time range preset in step S2 based on the raw water background. It should be noted that the aforementioned opening time range is a closed interval from a minimum value to a maximum value. Specifically, the general formula for calculating the target opening time is as follows: in, The calculated target on-time duration, This is the minimum value within the range of activation duration. To enable the maximum value of the duration range, This is the second water quality parameter collected in real time. The preset low pollution threshold, This is a preset high pollution threshold. It should be noted that as the number of cycles increases, it leads to... When the water level rises and tends to fall below the standard, the controller increases the target opening time using the above formula. Specifically, by extending the opening time of the control valve 631, the water quality monitoring and early warning system 600 increases the wastewater discharge, thereby allowing a larger proportion of new raw water to be introduced into the suction side of the water pump 614. This dilutes and adjusts the concentration of the circulating water within the water quality monitoring and early warning system 600, ensuring that the flushing water quality returns to the clean standard.

[0069] Specifically, this embodiment provides an implementation method with specific numerical values. Specifically, the activation duration determined in step S2 is within the range of 30 to 50 seconds. Specifically, the water quality monitoring and early warning system 600 presets a low pollution threshold for the second water quality parameter. The concentration was 0.5 mg / L, indicating a high pollution threshold. The value is 1 mg / L. Specifically, if the real-time TOC value is measured in step S301... The concentration is 0.85 mg / L. Since this value falls between 0.5 and 1, the controller calculates the target on-time using the general formula described above: Specifically, the calculated target opening time is 44 seconds. Specifically, if the real-time TOC value rises to 0.95 mg / L as the reflux cycle continues, and this value is close to the high pollution threshold, the target opening time calculated using the above general formula is dynamically corrected to 48 seconds. It should be noted that by extending the opening time, the water quality monitoring and early warning system 600 discharges a larger proportion of the circulating wastewater and correspondingly increases the replenishment ratio of new raw water. Specifically, the target closing time is determined as the difference between the total flushing cycle time and the target opening time. In an embodiment where the total flushing cycle time is 60 seconds, the target closing time is 60 minus the target opening time.

[0070] In step S303, the controller switches the control valve body's state according to the target opening and closing durations. Specifically, the controller drives the control valve body 631 to operate based on the specific execution value selected in step S302. Specifically, during the current flushing cycle, the control valve body 631 first remains open for the target opening duration, allowing wastewater to be discharged to the outlet 692 via discharge path B1; subsequently, the control valve body 631 switches to the closed state and remains closed for the target closing duration, allowing the remaining wastewater to be recycled via the return loop B2.

[0071] It should be noted that the above embodiments achieve fine-grained adjustment of the wastewater recovery and discharge ratio by real-time monitoring of the second water quality parameter at the purified water outlet. It should also be noted that this control strategy considers the physical characteristics of wastewater concentration increasing during circulation. By automatically increasing the discharge time and decreasing the recovery time when the real-time water quality tends to be substandard, and utilizing the dilution effect achieved by the replenishment of raw water, the quality of the purified water used to rinse the first monitoring unit 616 is ensured. Furthermore, this dynamic adjustment mechanism improves water saving rate while ensuring the monitoring accuracy of the water quality monitoring and early warning system under long-term circulating conditions.

[0072] In conjunction with the foregoing embodiments, refer to Figure 5 The aforementioned step S303, which controls the valve body to switch states according to the target opening duration and target closing duration, specifically includes the following steps: S3031. When the duration of the current state of the control valve body reaches the target opening time or the target closing time, the third water quality parameter characterizing the water quality at the current moment is obtained through the first monitoring unit. S3032. Determine whether the third water quality parameter is within the preset action execution parameter range; S3033. If the third water quality parameter is within the preset action execution parameter range, the control valve body will perform the corresponding opening and closing action to complete the state switching. S3034. If the third water quality parameter is not within the preset action execution parameter range, the current state will be extended for a preset compensation period, and the third water quality parameter will be reacquired when the preset compensation period expires.

[0073] Optionally, the third water quality parameter includes at least one of the following parameters: total organic carbon (TOC), total dissolved solids (TDS), chemical oxygen demand (COD), pH, conductivity, residual chlorine, temperature, and turbidity.

[0074] Optionally, regarding step S3031, when the duration of the current state of the control valve 631 reaches the aforementioned target opening duration or target closing duration, the water quality monitoring and early warning system 600 acquires a third water quality parameter characterizing the current water quality through the aforementioned first monitoring unit 616. It should be noted that the third water quality parameter is used to perform a final verification of the fluid state within the water quality monitoring and early warning system 600 at a preset time node. It should be pointed out that if the aforementioned target opening duration is calculated to be 46 seconds, then when the control valve 631 remains open for 46 seconds, the water quality monitoring and early warning system 600 uses the real-time TOC value collected by the first monitoring unit 616 as the third water quality parameter.

[0075] Regarding step S3032, the water quality monitoring and early warning system 600 determines whether the aforementioned third water quality parameter is within the preset action execution parameter range. Specifically, the third water quality parameter being within the preset action execution parameter range includes at least one of the following determination conditions: In an optional embodiment, the third water quality parameter is lower than a preset cleaning threshold. It should be noted that the aforementioned cleaning threshold can be set according to the tolerance level of the first monitoring unit 616, for example, set to 1 mg / L.

[0076] In an optional embodiment, the fluctuation range of the third water quality parameter within a preset sampling period is less than a preset fluctuation threshold. The specific determination formula is as follows: in, This represents the maximum value of the third water quality parameter within the sampling period. This represents the minimum value of the third water quality parameter within the sampling period. This is a preset fluctuation threshold. It should be understood that this condition is used to determine whether the water quality within the circulation system has reached a stable state.

[0077] In an optional embodiment, the change in the third water quality parameter relative to the aforementioned second water quality parameter reaches a preset improvement target value to satisfy the improvement condition. The specific determination formula is as follows: in, The second water quality parameter obtained in step S301 above, This is the third water quality parameter currently obtained. This is the preset improvement target value. It should be noted that this condition is used to determine whether the current discharge or dilution action has produced the expected water quality improvement effect.

[0078] Regarding step S3033, if the third water quality parameter meets any of the above-mentioned judgment conditions or a combination thereof, the controller determines that the external environment for the current state switching of the water quality monitoring and early warning system 600 is safe. Specifically, the controller outputs a control signal to drive the aforementioned control valve body 631 to perform the corresponding opening or closing action to complete the state switching. It should be noted that by introducing the above-mentioned judgment step, it is possible to prevent backflow switching from being performed when the preset time expires but the water quality still does not meet the standard, thereby protecting the aforementioned first monitoring unit 616 from the impact of high concentrations of pollutants.

[0079] Regarding step S3034, if the third water quality parameter is not within the preset action execution parameter range, the controller controls the aforementioned control valve 631 to extend the current state for a preset compensation duration. It should be noted that the preset compensation duration can be set according to the response sensitivity of the water quality monitoring and early warning system 600, for example, to 5 seconds or 10 seconds. When this preset compensation duration expires, the water quality monitoring and early warning system 600 re-executes step S3031 to obtain the latest third water quality parameter and makes a new determination. It should be pointed out that this compensation mechanism, by introducing a dynamic delay, ensures that the water quality monitoring and early warning system 600 can automatically extend the discharge time during abnormal pollution stages until the water quality returns to a safe range before performing the recycling switch.

[0080] It should be understood that this design takes into account the dynamic characteristics of the 626 filter component during the sewage discharge process, and avoids the failure of single-time control when water quality fluctuates significantly by introducing a compensation time.

[0081] In conjunction with the foregoing embodiments, refer to Figure 6 The aforementioned control method further includes the following steps: S3035. In response to extending the execution of the current state until the preset compensation period expires, and the change range of the third water quality parameter relative to the second water quality parameter still does not meet the improvement conditions, the deviation of the fourth water quality parameter relative to the first water quality parameter is obtained; wherein, the parameter index of the fourth water quality parameter is the same as that of the first water quality parameter, that is, the fourth water quality parameter and the first water quality parameter are the same type of monitoring index. The monitoring index of the first water quality parameter can be referred to the aforementioned embodiment, and will not be repeated here.

[0082] S3036. If the ratio of deviation to change is within the preset attribution ratio range, it is determined that the abnormal water quality is caused by fluctuations in the raw water, and the current state is stopped from being extended, and the control valve body is forced to perform opening and closing actions.

[0083] For step S3035, refer to Figure 1 The suction side of the water pump 614 is equipped with a second monitoring unit 613 for real-time monitoring of a fourth water quality parameter of the raw water background.

[0084] It should be noted that the aforementioned fourth water quality parameter represents the current state of the raw water entering the water quality monitoring and early warning system 600. Specifically, after the aforementioned preset compensation period expires, if the water quality monitoring and early warning system 600 detects a change in the aforementioned third water quality parameter relative to the aforementioned second water quality parameter... If the aforementioned preset improvement target value is still not achieved, the controller calls the aforementioned second monitoring unit 613 to obtain the current fourth water quality parameter. Specifically, the controller calculates... Compared to the first water quality parameter obtained in step S1 above. deviation It should be understood that this deviation is used to assess whether there are synchronous quality fluctuations in the raw water background during the flushing cycle. The formula for calculating the aforementioned deviation is as follows: For step S3036, the controller calculates the aforementioned deviation. Compared with the aforementioned range of change ratio It should be noted that the aforementioned range of change... The calculation formula is as follows: Specifically, ratio The calculation formula is as follows: Specifically, the water quality monitoring and early warning system 600 is pre-set with an attribution ratio range. It should be noted that if the calculated ratio Within the aforementioned preset attribution ratio range, the controller determines that the failure of the purified water quality output by the current filter component 626 to improve as expected is not caused by the failure of filtration efficiency, but by the synchronous deterioration or fluctuation of the raw water background quality.

[0085] Specifically, this embodiment provides an implementation method with specific numerical values. Specifically, the water quality monitoring and early warning system 600 has a preset attribution ratio range of [missing value]. It should be noted that if, after the extended discharge state of control valve 631 (i.e., the aforementioned preset compensation time) expires, the TOC value of the purified water (the aforementioned third water quality parameter) is only improved from 3 mg / L to 2.8 mg / L, the change is considered insignificant. The concentration was 0.2 mg / L, which did not meet the improvement conditions. Meanwhile, if the TDS value of the raw water (the aforementioned fourth water quality parameter) measured by the second monitoring unit 613 increases from 1000 ppm of the first water quality parameter to 1020 ppm, then the raw water deviation is considered... The value is 20 ppm. It should be noted that if the water quality monitoring and early warning system 600 has a preset conversion coefficient that maps the TDS deviation to an equivalent TOC change unit, the equivalent deviation is assumed to be... The value is 0.22. The ratio is calculated as follows: Since the ratio 1.1 is within the preset range Internally, the controller determines that the slow improvement in purified water quality is caused by a deterioration in the raw water background. Specifically, the controller stops extending the current state and drives the control valve 631 to forcibly close, switching to wastewater recycling mode. It should be understood that this mechanism avoids the water quality monitoring and early warning system 600 from extending the discharge time indefinitely due to objective fluctuations in the raw water background, thus balancing the monitoring environment requirements with the water conservation goals of the water quality monitoring and early warning system.

[0086] It should be noted that the above conversion coefficients can be preset in the controller based on the experimental correlation curves between different dimensions of water quality parameters (such as TDS and TOC).

[0087] It should be noted that the above embodiments, by introducing correlation analysis of raw water background fluctuations, achieve accurate attribution of the causes of water quality anomalies. It should also be noted that this logic can effectively distinguish between two different types of water quality deterioration: filter cartridge fouling and sudden changes in raw water flow. Specifically, when the cause is determined to be raw water, the water quality monitoring and early warning system 600 no longer pursues unattainable improvement goals by indefinitely extending the discharge time, thereby ensuring the operational efficiency of the water quality monitoring and early warning system 600.

[0088] In the water quality monitoring and early warning system 600 provided in this embodiment, the controller achieves the flushing of the first monitoring unit 616 and the dynamic recycling of wastewater through closed-loop logic control of the first water quality parameter, the second water quality parameter, the third water quality parameter, and the fourth water quality parameter. The coupling relationship between the aforementioned parameters constitutes a feature that distinguishes this application from conventional water purifiers.

[0089] Specifically, at the initial stage of the flushing phase, the water quality monitoring and early warning system 600 responds to the received flushing command and acquires a first water quality parameter characterizing the background water quality of the raw water. Based on the aforementioned first water quality parameter, the controller determines the initial opening and closing parameters of the control valve 631 within the flushing cycle. The aforementioned initial opening and closing parameters include at least one of an opening duration range and a closing duration range. Conventional water purifiers typically perform fixed segmented mode switching based on the inlet water value. However, this application uses the first water quality parameter as a feedforward reference to preset an opening and closing duration benchmark for the first monitoring unit 616 under the raw water monitoring environment, which fluctuates with the background water quality, rather than simply switching water-saving ratios.

[0090] During the pollutant discharge process when the control valve 631 is in the open state, the controller acquires a second water quality parameter characterizing the real-time water quality of the purified water currently used for flushing through the first monitoring unit 616. Based on the second water quality parameter, the controller determines a target opening duration within the aforementioned opening duration range. Conventional water purifiers typically aim to increase the water production rate through their recycling logic. However, this application implements feedback intervention through the second water quality parameter to ensure that the pollutant concentration in the flow channel has been reduced to a preset standard before entering the recycling stage, thereby minimizing the impact on the environment monitored by the first monitoring unit 616.

[0091] When the current state of the control valve body 631 lasts for the aforementioned target opening duration, the controller acquires a third water quality parameter characterizing the current water quality through the first monitoring unit 616, and determines whether the third water quality parameter is within the preset action execution parameter range. Specifically, the aforementioned action execution parameter range includes the third water quality parameter having a fluctuation amplitude within a preset sampling period that is less than a preset fluctuation threshold. Conventional water purifiers typically do not focus on the convergence of water quality values, while this application uses the third water quality parameter to determine whether the water quality in the flow path is in a stable state. If the above determination condition is not met, the controller extends the current state execution for a preset compensation duration to avoid interference with monitoring accuracy caused by performing the recycling switching action under the condition that pollutants in the flow path have not been completely discharged.

[0092] During the wastewater recycling stage, the controller acquires a fourth water quality parameter characterizing the real-time background of the raw water through the second monitoring unit 613. In response to extending the execution of the aforementioned current state until the preset compensation period expires, and if the change in the third water quality parameter relative to the second water quality parameter still does not meet the improvement conditions, the controller acquires the deviation of the fourth water quality parameter relative to the aforementioned first water quality parameter.

[0093] If the ratio of the aforementioned deviation to the change range is within the preset attribution ratio range, it is determined that the abnormal purified water quality is caused by fluctuations in the raw water background, and the current state is stopped from being extended. The control valve 631 is then forced to perform an opening and closing action. Conventional water purifiers lack the ability to distinguish the causes of deterioration in the recycled fluid. This application achieves attribution determination of the cause of water quality abnormalities by comparing the fourth water quality parameter with the aforementioned parameters, thus avoiding the water quality monitoring and early warning system 600 from indefinitely extending the discharge time due to objective fluctuations in the raw water background.

[0094] In summary, the logical relationships between the aforementioned first, second, third, and fourth water quality parameters construct a complete control system from initial sensing and online compensation to attribution and interception. It should be noted that the essential purpose of the aforementioned multi-parameter coupling logic is to improve wastewater utilization efficiency while ensuring that the first monitoring unit 616 is at a high level of physical cleanliness. The aforementioned verification of water quality stability and attribution of the causes of pollutant accumulation constitute the substantial difference between this application and conventional water purification logic in the prior art.

[0095] It should be further explained that the aforementioned control method and the flow path architecture of the water quality monitoring and early warning system are substantially different from the wastewater utilization logic of conventional water purifiers in the prior art in terms of technical purpose and application environment.

[0096] In conventional water purifiers, the flushing branch is typically used for maintenance of the reverse osmosis membrane. Because reverse osmosis membranes are prone to impurities and microbial growth during non-operational periods, flushing is necessary to remove these deposits from the membrane surface. Meanwhile, in conventional water purification scenarios, water quality sensors (such as TOC or TDS sensors) are usually located on the product water side of the filtration path (i.e., the rear end). Since this location is in a relatively clean water environment, and the fluid in contact with the sensor has already undergone deep filtration, the risk of contamination is low, and therefore, specialized flushing or calibration procedures for the sensor are usually not required.

[0097] It should also be noted that the water quality monitoring and early warning system 600 provided in this application is mainly used for monitoring and early warning of raw water. In this application scenario, the first monitoring unit 616 needs to be in direct contact with raw water that has not been filtered by a reverse osmosis membrane. Since the aforementioned raw water has not undergone desalination or impurity removal treatment, during the recycling and reuse of wastewater, the concentration of pollutants in the flow channel will continuously accumulate and dynamically increase due to the recycling process.

[0098] Therefore, the aforementioned control method senses the real-time water quality status and dynamically adjusts the opening and closing parameters of the control valve 631, using the purified water produced by the filter assembly 626 to perform targeted rinsing on the sensor in the aforementioned raw water environment. This design, through dynamic control of the physical flow path, avoids interference from pollutant accumulation on the monitoring environment, ensuring the measurement accuracy of the first monitoring unit 616 under raw water monitoring conditions.

[0099] It should be noted that the foregoing embodiments are merely illustrative of the technical concept of this disclosure. The attribution ratio ranges, conversion coefficients, and specific judgment logic in the water quality monitoring and early warning system can all be equivalently adjusted according to the actual sensor range. Any modifications or equivalent substitutions made within the spirit and principles of this disclosure should be covered within the scope of protection of this disclosure.

[0100] Example 2 The following is in conjunction with the appendix Figure 1This document provides a detailed description of the hardware structure of a water quality monitoring and early warning system 600 according to embodiments of this disclosure. It should be noted that the following embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0101] Reference Figure 1 The aforementioned water quality monitoring and early warning system 600 includes an inlet pipe, a water pump 614, a first monitoring unit 616, a filter assembly 626, and a return loop.

[0102] Specifically, an inlet 691 is provided on the aforementioned inlet pipe. An inlet filter unit 611 and a third switching valve 612 are sequentially arranged along the water flow direction on the aforementioned inlet pipe. The aforementioned inlet filter unit 611 can be a micro-filter. The suction side of the aforementioned water pump 614 is connected to the aforementioned inlet pipe. It should be noted that a second monitoring unit 613 is also provided on the suction side of the aforementioned water pump 614 or on the inlet pipe. The aforementioned second monitoring unit 613 is configured to acquire a first water quality parameter characterizing the initial background of the raw water, and a fourth water quality parameter characterizing the real-time background of the raw water.

[0103] The aforementioned water pump 614 is used to transport fluid to its discharge side. A raw water monitoring branch and a filter flushing branch are connected in parallel on the discharge side of the aforementioned water pump 614.

[0104] Optionally, a first switching valve 615 is provided on the aforementioned raw water monitoring branch. A second switching valve 625 and a filter assembly 626 are provided on the aforementioned filtration and flushing branch. It should be noted that the aforementioned filter assembly 626 includes a composite filter element, i.e., a CF filter, and a reverse osmosis filter element, i.e., an RO filter. It should be understood that the water pump 614 is configured to provide pressure to the filter assembly in the filtration and flushing branch. When the water quality monitoring and early warning system 600 performs raw water monitoring, the first monitoring unit 616 performs direct monitoring of the raw water, and the raw water can flow through the first switching valve 615 relying on the pressure of the external water source itself, without needing to be pumped in by the water pump 614; when the water quality monitoring and early warning system 600 performs filtration and flushing, the water pump 614 starts and applies pressure, forcibly pushing the fluid through the reverse osmosis filter element in the filter assembly 626 to achieve filtration and produce purified water.

[0105] The aforementioned filter assembly 626 has a purified water outlet A1 and a wastewater outlet A2. A second check valve 627 is provided on the flow path where the purified water outlet A1 is located. The aforementioned raw water monitoring branch outlet and the aforementioned purified water outlet A1 merge to form a common flow path. The aforementioned first monitoring unit 616 is located on the aforementioned common flow path. A first check valve 619 is provided downstream of the aforementioned first monitoring unit 616, and leads to the outlet 692 of the aforementioned water quality monitoring and early warning system 600.

[0106] The wastewater outlet A2 of the aforementioned filter assembly 626 is connected to a wastewater path. A second throttling element 628 and a third check valve 629 are provided on the wastewater path. For example, the second throttling element 628 can be a 300cc throttling valve. It should be noted that the third check valve 629 is used to block the backflow loop or the reverse flow of fluid from outside the water quality monitoring and early warning system 600 towards the filter assembly 626.

[0107] The aforementioned third check valve 629 has a branch node at its rear end. This branch node divides the wastewater flow path into a discharge path B1 and a return loop B2. A control valve body 631 is installed on the discharge path B1 and leads to the aforementioned outlet 692. The aforementioned return loop B2 connects the wastewater outlet of the aforementioned filter assembly 626 to the pump suction side. It should be noted that a return device 632 is installed on the return loop B2. The aforementioned control valve body 631 is used to regulate the flow direction of the wastewater. When the aforementioned control valve body 631 is closed, the discharge path B1 is disconnected, and the wastewater is forced to return to the suction side of the aforementioned pump 614 via the aforementioned return loop B2 and the aforementioned return device 632 for recycling; when the aforementioned control valve body 631 is open, the wastewater is discharged to the outlet 692 via the aforementioned control valve body 631.

[0108] Optionally, the aforementioned water quality monitoring and early warning system 600 further includes an auxiliary monitoring branch. The inlet end of the auxiliary monitoring branch is connected to the inlet pipe upstream of the suction side of the water pump 614, and its outlet end is connected to the outlet pipe of the water quality monitoring and early warning system downstream of the first monitoring unit 616. Along the water flow direction, the auxiliary monitoring branch is sequentially equipped with a first throttling element 641, a pH electrode 642, a residual chlorine electrode 643, and a fourth one-way valve 649. The aforementioned first throttling element 641 can be a 600cc throttling valve.

[0109] In addition, the aforementioned water quality monitoring and early warning system 600 may optionally be equipped with an air introduction mechanism. The air inlet 694 is connected to the suction side of the water pump 614 via a fifth check valve 659 and a fourth switching valve 651.

[0110] The aforementioned water quality monitoring and early warning system 600 also includes a controller. The controller is communicatively connected to the first switching valve 615, the second switching valve 625, the first monitoring unit 616, the second monitoring unit 613, and the control valve body 631. It should be noted that the controller is configured to execute the aforementioned control method in response to a flushing command. For a description of the control method, please refer to the aforementioned control method embodiments; further details will not be repeated here.

[0111] The above embodiments are merely illustrative of the technical concept of this disclosure. It should be noted that the specifications of each component, the sequence of pipeline connections, and the specific valve parameters in the water quality monitoring and early warning system 600 can be equivalently adjusted according to actual operating conditions. Any equivalent changes made within the spirit and principles of this disclosure should be covered within the scope of protection of this disclosure.

[0112] Example 3 In one embodiment of this disclosure, a water quality monitoring and early warning device is provided. It should be noted that the following embodiments are intended to illustrate the hardware configuration and working principle of the device, and are not intended to limit the scope of protection of this disclosure.

[0113] Reference Figure 1 The water quality monitoring and early warning equipment includes a processor, a memory, and hardware components required to implement the control method. The processor and memory are communicatively connected. The memory stores computer program instructions, and the processor executes these instructions to implement the control method described in any of the foregoing embodiments.

[0114] The hardware components required to implement the aforementioned control method include a water pump 614, a first switching valve 615, a second switching valve 625, a filter assembly 626, a first monitoring unit 616, a control valve body 631, and a return circuit.

[0115] Regarding the power and control switching section, the aforementioned water pump 614 is installed on the inlet path of the water quality monitoring and early warning system 600 to drive fluid flow to its outlet side. The aforementioned first switching valve 615 is installed on the raw water monitoring branch. The aforementioned second switching valve 625 is installed on the filter flushing branch. The processor controls the opening and closing states of the first switching valve 615 and the second switching valve 625 to switch between the raw water direct monitoring mode and the filter flushing mode.

[0116] Regarding the filtration and monitoring section, the aforementioned filter assembly 626 is disposed on the aforementioned filter flushing branch. Optionally, the aforementioned filter assembly 626 includes a composite filter element (CF filter) and a reverse osmosis filter element (RO filter) arranged in series. The aforementioned filter assembly 626 has a purified water outlet A1 and a wastewater outlet A2. The aforementioned first monitoring unit 616 is disposed on the common flow path and is used to monitor the purified water quality flowing out of the purified water outlet A1 or the raw water quality flowing out of the raw water monitoring branch. It should be noted that the first monitoring unit 616 can transmit the collected water quality electrical signals to the aforementioned processor in real time.

[0117] Regarding the wastewater treatment section, the aforementioned return loop is connected between the wastewater outlet A2 of the aforementioned filter assembly 626 and the suction side of the aforementioned water pump 614. The aforementioned control valve body 631 is installed on the aforementioned return loop and is connected to the outlet 692 of the water quality monitoring and early warning system 600 via the discharge path B1. It should be noted that the processor outputs control commands to the aforementioned control valve body 631 based on the monitored water quality parameters. When the aforementioned control valve body 631 is in the closed state, the aforementioned discharge path B1 is blocked, and the wastewater is forced to return to the suction side of the water pump 614 through the aforementioned return loop; when the aforementioned control valve body 631 is in the open state, the wastewater is discharged to the outside of the water quality monitoring and early warning system 600 via the aforementioned control valve body 631.

[0118] Optionally, the aforementioned hardware components also include a second monitoring unit 613 disposed on the suction side of the water pump 614 or on the inlet pipe. The second monitoring unit 613 is used to acquire a first water quality parameter characterizing the background of the raw water and provide it to the processor as the basis for determining the initial opening and closing parameters of the control valve body 631.

[0119] Optionally, the aforementioned hardware components also include an auxiliary monitoring branch. Along the water flow direction, the auxiliary monitoring branch is sequentially equipped with a first throttling element 641, a pH electrode 642, a residual chlorine electrode 643, and a fourth one-way valve 649. The aforementioned processor is also communicatively connected to both the pH electrode 642 and the residual chlorine electrode 643 to achieve multi-dimensional water quality monitoring and early warning.

[0120] It should be noted that the aforementioned water quality monitoring and early warning equipment achieves dynamic utilization of flushing wastewater through the processor's logical control of various hardware components. It should be understood that the initial start / stop parameters and target duration calculation logic recorded in the memory ensure that when the memory instructions are executed by the processor, the water quality monitoring and early warning system 600 can improve water resource recovery efficiency while maintaining monitoring accuracy.

[0121] The foregoing embodiments are merely illustrative of the technical concept of this disclosure. It should be noted that the specific models of the hardware components, the physical locations of the pipe connections, and the processing specifications of the processor can all be equivalently adjusted according to actual operating conditions. Any equivalent changes made within the spirit and principles of this disclosure should be covered within the scope of protection of this disclosure.

Claims

1. A control method of a water quality monitoring and early warning system, characterized by, The water quality monitoring and early warning system comprises a raw water monitoring branch and a filter flushing branch arranged in parallel; wherein the raw water monitoring branch is provided with a first on-off valve, the filter flushing branch is provided with a second on-off valve and a filter assembly, and the water quality monitoring and early warning system further comprises a water pump for providing pressure to the filter assembly; a first monitoring unit is arranged on a common flow path formed by the raw water monitoring branch and a clean water outlet of the filter assembly, so that the first monitoring unit selectively receives and monitors raw water from the raw water monitoring branch or clean water from the filter assembly by switching the on-off state of the first on-off valve and the second on-off valve; the waste water generated by the filter assembly is communicated with the suction side of the water pump through a backflow circuit provided with a control valve body, so as to adjust the recovery or discharge of the waste water through the control valve body; The method comprises: In response to the received flushing instruction, a first water quality parameter representing the background water quality of the raw water is obtained; wherein the first water quality parameter comprises at least one of total organic carbon, total dissolved solids, chemical oxygen demand, pH, conductivity, residual chlorine, temperature, and turbidity; According to the first water quality parameter, an initial opening and closing parameter of the control valve body in the flushing period is determined; wherein the initial opening and closing parameter at least includes an opening time range and / or a closing time range; Based on the initial opening and closing parameter, the control valve body is controlled to switch between the opening state and the closing state to dynamically utilize the waste water.

2. The control method according to claim 1, characterized by, The step of "controlling the control valve body to switch between the opening state and the closing state" specifically comprises: A second water quality parameter representing the real-time water quality of the clean water currently used for flushing is obtained by the first monitoring unit; wherein the second water quality parameter comprises at least one of total organic carbon, total dissolved solids, chemical oxygen demand, pH, conductivity, residual chlorine, temperature, and turbidity; According to the second water quality parameter, a target opening time within the opening time range is determined, and / or a target closing time within the closing time range is determined; The control valve body is controlled to perform state switching according to the target opening time and / or the target closing time.

3. The control method according to claim 2, characterized by, The step of "controlling the control valve body to perform state switching according to the target opening time and / or the target closing time" specifically comprises: When the current state duration of the control valve body reaches the target opening time or the target closing time, a third water quality parameter representing the water quality of the clean water at the current time is obtained by the first monitoring unit; wherein the third water quality parameter comprises at least one of total organic carbon, total dissolved solids, chemical oxygen demand, pH, conductivity, residual chlorine, temperature, and turbidity; It is judged whether the third water quality parameter is within a preset action execution parameter range; If the third water quality parameter is within the preset action execution parameter range, the control valve body is controlled to perform a corresponding opening and closing action to complete the state switching. If the third water quality parameter is not within the preset action execution parameter range, the current state is extended for a preset compensation duration, and the third water quality parameter is reacquired when the preset compensation duration expires.

4. The control method according to claim 3, characterized by The third water quality parameter within the preset action execution parameter range includes at least one of the following determination conditions: The third water quality parameter is lower than a preset cleaning threshold value; The fluctuation amplitude of the third water quality parameter within a preset sampling period is less than a preset fluctuation threshold value; The change amplitude of the third water quality parameter relative to the second water quality parameter reaches a preset improvement target value to satisfy an improvement condition.

5. The control method according to claim 4, characterized by The suction side of the water pump is provided with a second monitoring unit for monitoring a fourth water quality parameter of raw water in real time; wherein the fourth water quality parameter has the same parameter index as the first water quality parameter; The control method further includes the steps of: In response to extending the current state to the expiration of the preset compensation duration, and the change amplitude of the third water quality parameter relative to the second water quality parameter still not satisfying the improvement condition, the deviation of the fourth water quality parameter relative to the first water quality parameter is acquired; If the ratio of the deviation to the change amplitude is within a preset attribution ratio interval, it is determined that the abnormality of the purified water quality is caused by raw water fluctuation, and the extension of the current state is stopped, and the control valve body is controlled to forcibly execute the opening and closing action.

6. The control method according to claim 1, characterized by, The step of "acquiring the first water quality parameter representing the background water quality of the raw water" includes: The first switch valve is controlled to open and the second switch valve is controlled to close, so that the first water quality parameter is acquired by the first monitoring unit; or the first water quality parameter is acquired by the second monitoring unit arranged at the front end of the suction side of the water pump.

7. The control method according to claim 1, characterized by, The step of "controlling the control valve body to switch between the open state and the closed state" includes: An real-time feedback parameter representing the real-time water quality of the purified water measured by the first monitoring unit is acquired; In response to the real-time feedback parameter exceeding a preset pollution threshold value, and / or the rising rate of the real-time feedback parameter reaching a preset discharge threshold value, the control valve body is controlled to execute the opening action to switch to the discharge state; In response to the real-time feedback parameter being lower than a preset clean threshold value, and / or the change trend of the real-time feedback parameter being stable within a preset duration, the control valve body is controlled to execute the closing action to switch to the waste water recovery state.

8. A water quality monitoring and early warning system characterized in that, It includes: A water inlet pipeline and a water pump, the suction side of the water pump being in communication with the water inlet pipeline; A raw water monitoring branch and a filter flushing branch are connected in parallel to the discharge side of the water pump; the water pump is configured to provide pressure to a filter assembly in the filter flushing branch; wherein the first switch valve is arranged on the raw water monitoring branch, and the second switch valve and the filter assembly are arranged on the filter flushing branch; A first monitoring unit is arranged on a common flow path formed by the raw water monitoring branch and the filter assembly purified water outlet, so that the first monitoring unit can alternatively monitor the raw water from the raw water monitoring branch or the purified water from the filter assembly according to the opening and closing states of the first switch valve and the second switch valve. A reflux loop is connected between the wastewater outlet of the filter assembly and the suction side of the water pump, and a control valve is arranged on the reflux loop. A controller is communicatively connected with the first switch valve, the second switch valve, the first monitoring unit, and the control valve, and executes the control method according to any one of claims 1 to 7.

9. The water quality monitoring and early warning system of claim 8, wherein, An auxiliary monitoring branch is further included; The inlet end of the auxiliary monitoring branch is connected to the water inlet pipeline upstream of the suction side of the water pump, and the outlet end is connected to the water quality monitoring and early warning system outlet pipeline downstream of the first monitoring unit. The auxiliary monitoring branch is sequentially provided with a first throttling element, a pH electrode, a residual chlorine electrode, and a fourth one-way valve in the water flow direction.

10. The water quality monitoring and early warning system of claim 8, wherein, A second throttling element is arranged on the wastewater outlet path of the filter assembly; a third one-way valve is arranged at the rear end of the second throttling element, and the third one-way valve is used to block the reverse flow of fluid from the reflux loop or the water quality monitoring and early warning system to the filter assembly.

11. The water quality monitoring and warning system of claim 8, wherein, Further comprising: A second monitoring unit arranged on the suction side of the water pump or the water inlet pipeline; The second monitoring unit is communicatively connected with the controller, and is used to acquire a first water quality parameter representing the initial background of the raw water, and a fourth water quality parameter representing the real-time background water quality of the raw water; the fourth water quality parameter has the same parameter index as the first water quality parameter.

12. A water quality monitoring and early warning device, characterized in that, Comprise: A memory for storing computer program instructions; A processor for executing the computer program instructions to implement the control method according to any one of claims 1 to 7; And hardware components required for implementing the method, including a water pump, a first switch valve, a second switch valve, a filter assembly, a first monitoring unit, a second monitoring unit, a control valve, and a reflux loop.

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