A reverse osmosis water purification system and an adaptive dynamic control method thereof

Abstract

The application relates to a reverse osmosis water purification system and a self-adaptive dynamic control method thereof, and relates to the technical field of reverse osmosis water purification; based on obtained multiple state parameters of the reverse osmosis water purification system, when a water production request is detected, a multi-factor decision algorithm is used to determine the main and auxiliary roles of two reverse osmosis membrane filter elements in a current water production cycle and the optimal working mode of the current water production cycle; a water path execution mechanism is dynamically controlled according to the optimal working mode and the main and auxiliary roles, so as to adjust the water path connection relationship of the two reverse osmosis membrane filter elements; in the water production process, the main and auxiliary roles are dynamically adjusted or a protection mechanism is triggered according to the comparison result of water quality related parameters and corresponding preset threshold values; after the water production cycle ends, cumulative use parameters are updated, and the reverse osmosis water purification system is controlled to execute a flushing program matched with the optimal working mode and then enters a standby state; and the technical scheme of the application realizes intelligent regulation and control and performance optimization of the two reverse osmosis membrane filter elements through self-adaptive dynamic control logic in the whole process.

Description

Technical Field

[0001] This application relates to the technical field of reverse osmosis water purification, and more particularly to a reverse osmosis water purification system and its adaptive dynamic control method. Background Technology

[0002] In existing reverse osmosis water purification systems, the dual reverse osmosis membrane filter scheme is widely used because it can improve the water recovery rate. Current technologies mostly employ a fixed series control mode, using the concentrated water from the primary reverse osmosis membrane as the feed water for the secondary reverse osmosis membrane for secondary filtration. However, this mode has significant drawbacks. The primary reverse osmosis membrane bears the maximum fouling load from the raw water end for extended periods, causing its performance to degrade much faster than that of the secondary reverse osmosis membrane. This limits the system's lifespan to the primary reverse osmosis membrane, making it impossible to achieve balanced wear and tear between the two membranes.

[0003] Some technologies attempt to use reverse osmosis membranes alternately by switching them over time, but their switching logic is rigid, only taking time as a single reference and failing to comprehensively consider multiple dimensions of information such as water quality parameters, actual filter wear, and user water usage habits. This makes it difficult to achieve optimal global control of filter life, water-saving efficiency, and effluent water quality.

[0004] Meanwhile, the existing system lacks the ability to adaptively adjust water quality and water usage status. It cannot dynamically adjust the water production and wastewater ratio strategy based on the total dissolved solids value of raw water and the total dissolved solids value of pure water, which can easily lead to insufficient purification effect or waste of water resources. Moreover, the flushing and maintenance mechanism is simple and does not set differentiated flushing modes based on standby time and water usage frequency. Dead water areas are easily formed inside the system, which can breed microorganisms, affecting the stability of the effluent water quality and further accelerating the non-natural wear and tear of the filter element. Summary of the Invention

[0005] This application provides a reverse osmosis water purification system and its adaptive dynamic control method, which realizes intelligent regulation and performance optimization of dual reverse osmosis membrane filter elements through adaptive dynamic control logic throughout the entire process.

[0006] In a first aspect, this application provides an adaptive dynamic control method for a reverse osmosis water purification system, applied to a reverse osmosis water purification system containing two reverse osmosis membrane filter cartridges. The method includes: acquiring multiple state parameters of the reverse osmosis water purification system, wherein the multiple state parameters include at least cumulative usage parameters, water quality-related parameters, and system water usage status parameters corresponding to each of the two water paths; when a water production request is detected, determining the primary and secondary roles of the two reverse osmosis membrane filter cartridges in the current water production cycle, and the optimal operating mode of the current water production cycle, based on the multiple state parameters and a preset multi-factor decision algorithm; dynamically controlling the water path actuators of the reverse osmosis water purification system according to the optimal operating mode and the primary and secondary roles, to adjust the water path connection relationship of the two reverse osmosis membrane filter cartridges; during water production, monitoring the water quality-related parameters in real time, and dynamically adjusting the primary and secondary roles or triggering a protection mechanism based on the comparison results of the water quality-related parameters with corresponding preset thresholds; after the water production cycle ends, updating the cumulative usage parameters, and controlling the reverse osmosis water purification system to execute a flushing procedure matching the optimal operating mode before entering a standby state.

[0007] In one possible implementation, the two reverse osmosis membrane filter elements include a first reverse osmosis membrane filter element and a second reverse osmosis membrane filter element, and the two water passages include a first water passage with the first reverse osmosis membrane filter element as the main filter element and the second reverse osmosis membrane filter element as the auxiliary filter element, and a second water passage with the second reverse osmosis membrane filter element as the main filter element and the first reverse osmosis membrane filter element as the auxiliary filter element.

[0008] In one possible implementation, determining the primary and secondary roles of the two reverse osmosis membrane filter cartridges in the current water production cycle based on the multiple state parameters and a preset multi-factor decision algorithm specifically includes: subtracting the cumulative usage parameters corresponding to the second water path from the cumulative usage parameters corresponding to the first water path to calculate the workload difference value of the water path; comparing the workload difference value of the water path with a preset equilibrium threshold; when the workload difference value of the water path is greater than the preset equilibrium threshold, determining the second reverse osmosis membrane filter cartridge as the primary filter cartridge and the first reverse osmosis membrane filter cartridge as the secondary filter cartridge; when the workload difference value of the water path is not greater than the negative value of the preset equilibrium threshold, determining the first reverse osmosis membrane filter cartridge as the primary filter cartridge and the second reverse osmosis membrane filter cartridge as the secondary filter cartridge; when the absolute value of the workload difference value of the water path is not greater than the preset equilibrium threshold, generating random numbers using a preset random number generation algorithm, and determining the primary and secondary roles of the first and second reverse osmosis membrane filter cartridges in the current water production cycle based on the numerical range of the random numbers.

[0009] In one possible implementation, determining the optimal operating mode for the current water production cycle based on the multiple state parameters using a preset multi-factor decision algorithm specifically includes: determining a basic operating mode for the current water production cycle from multiple preset operating modes according to the system water usage state parameters. The basic operating mode includes at least the series and / or parallel water production relationship of the two reverse osmosis membrane filter cartridges during the water production process. The system water usage state parameters include the system continuous standby time and / or recorded water usage duration. Adjusting the operating parameters under the basic operating mode according to the water quality-related parameters and the system water usage state parameters to form the optimal operating mode for the current water production cycle, the adjustment includes at least one of the following: adjusting the wastewater discharge ratio for the current water production cycle, adjusting the flushing program type executed after the current water production cycle ends, or triggering a zero-stagnant-water flushing mode in standby mode.

[0010] In one possible implementation, determining the basic operating mode of the current water production cycle from multiple preset operating modes based on the system water usage status parameters specifically includes: obtaining the continuous standby time of the system before the current water production cycle; comparing the continuous standby time of the system with a preset standby threshold; when the continuous standby time of the system exceeds the preset standby threshold, determining that the basic operating mode of the current water production cycle includes at least one of the following: a series water production mode, or a combination of a series water production mode and a parallel water production mode; when the continuous standby time of the system is less than or equal to the preset standby threshold, determining that the basic operating mode of the current water production cycle is a series water production mode; wherein, the water circuit connection relationship corresponding to the series water production mode is that the two reverse osmosis membrane filter elements are connected in series, and the water circuit connection relationship corresponding to the parallel water production mode is that the two reverse osmosis membrane filter elements are connected in parallel.

[0011] In one possible implementation, adjusting the operating parameters under the basic working mode based on the water quality-related parameters and the system water usage status parameters to form the optimal working mode for the current water production cycle specifically includes: adjusting the wastewater discharge ratio of the current water production cycle based on the comparison result of the water quality-related parameters and a first preset threshold; adjusting the flushing program type executed after the current water production cycle ends based on the comparison result of the recorded water usage duration and a second preset threshold; and triggering a zero-stagnant-water flushing mode in the standby state based on the comparison result of the system's continuous standby time and a third preset threshold.

[0012] In one possible implementation, dynamically controlling the water circuit actuator of the reverse osmosis water purification system according to the optimal operating mode and the primary / secondary roles to adjust the water circuit connection relationship of the two reverse osmosis membrane filter elements specifically includes: determining the target water flow path corresponding to the current water production cycle according to the optimal operating mode; determining the access order of the two reverse osmosis membrane filter elements in the target water flow path according to the primary / secondary roles; and controlling the on / off states of the corresponding valves and pumps in the water circuit actuator according to the target water flow path and the access order, so that the water circuit of the reverse osmosis water purification system switches to a water circuit connection relationship that matches the optimal operating mode and the primary / secondary roles.

[0013] In one possible implementation, the real-time monitoring of the water quality-related parameters and the dynamic adjustment of the primary and secondary roles or the triggering of a protection mechanism based on the comparison results of the water quality-related parameters with corresponding preset thresholds specifically include: real-time monitoring of the water quality-related parameters, wherein the water quality-related parameters include raw water quality parameters and effluent water quality parameters; when the effluent water quality parameters exceed the raw water quality parameters and the duration exceeds a first preset duration, a protection mechanism is triggered to generate a water quality anomaly warning message; when the effluent water quality parameters exceed a preset water quality threshold and the duration exceeds a second preset duration, the primary and secondary roles of the two reverse osmosis membrane filter elements are switched, and after the switch, the effluent water quality parameters are re-evaluated to see if they exceed the preset water quality threshold, until the primary and secondary role relationship that optimizes the effluent water quality is determined.

[0014] In one possible implementation, after the water production cycle ends, updating the cumulative usage parameters and controlling the reverse osmosis water purification system to execute a flushing procedure matching the optimal working mode before entering a standby state specifically includes: after the current water production cycle ends, obtaining the actual operating time of the two reverse osmosis membrane filter cartridges during the current water production cycle; updating the cumulative usage parameters corresponding to each of the two water paths according to the actual operating time; determining the corresponding flushing procedure type according to the optimal working mode of the current water production cycle; controlling the water path actuator of the reverse osmosis water purification system to execute the flushing procedure corresponding to the flushing procedure type to flush the two reverse osmosis membrane filter cartridges until the flushing procedure is completed; and then controlling all valves in the water path actuator to close, so that the reverse osmosis water purification system enters a low-power standby state.

[0015] Secondly, this application provides a reverse osmosis water purification system, the system comprising: two reverse osmosis membrane filter elements, wherein the two reverse osmosis membrane filter elements include a first reverse osmosis membrane filter element and a second reverse osmosis membrane filter element; a high-pressure switch for detecting water production requests; a sensing unit for collecting multiple state parameters of the reverse osmosis water purification system, wherein the multiple state parameters include at least cumulative usage parameters of two water circuits, water quality-related parameters, and system water usage status parameters; a water circuit actuator for adjusting the water circuit connection relationship of the two reverse osmosis membrane filter elements during the water production process; and a controller electrically connected to the sensing unit, the water circuit actuator, and the high-pressure switch, wherein the controller is configured to execute the adaptive dynamic control method described in any one of the above claims.

[0016] In one possible implementation, the water circuit actuator includes: a main inlet valve, located on the raw water inlet line of the reverse osmosis water purification system; a booster pump, located on the raw water inlet line downstream of the main inlet valve; a first inlet valve, located at the inlet of the first reverse osmosis membrane filter element; a second inlet valve, located at the inlet of the second reverse osmosis membrane filter element; a first outlet valve, located at the wastewater outlet of the first reverse osmosis membrane filter element; a second outlet valve, located at the wastewater outlet of the second reverse osmosis membrane filter element; and a wastewater valve, located on the wastewater line between the wastewater outlets and wastewater discharge ports of the two reverse osmosis membrane filter elements. A flow valve is installed in the reflux water path between the pure water outlet and the inlet of the two reverse osmosis membrane filter elements; a first check valve is installed in the water path between the pure water outlet of the first reverse osmosis membrane filter element and the reflux valve; a second check valve is installed between the wastewater outlet of the first reverse osmosis membrane filter element and the inlet of the second reverse osmosis membrane filter element; a third check valve is installed between the wastewater outlet of the second reverse osmosis membrane filter element and the inlet of the first reverse osmosis membrane filter element; a fourth check valve is installed on the bypass pipe connecting the raw water inlet and the wastewater discharge pipe; and a fifth check valve is installed on the pure water drain pipe of the reverse osmosis water purification system.

[0017] This application provides a reverse osmosis water purification system and its adaptive dynamic control method, which has the following advantages compared with the prior art:

[0018] By acquiring multi-dimensional parameters such as cumulative usage parameters, water quality parameters, and system water usage status parameters for each of the two water paths when a water production request is triggered, this system breaks away from the rigid control logic of traditional technologies that rely on a single time dimension or fixed series connections. This allows the allocation of the primary and secondary roles of the dual reverse osmosis membranes to better align with the actual wear and tear of the filter cartridges, addressing the issue of uneven filter cartridge wear at its source. Simultaneously, by determining the optimal operating mode based on multi-factor decision-making and dynamically adjusting the water path actuators, the system can adaptively adjust its operating strategy according to actual water quality and water usage status, solving the problem of traditional systems being unable to adapt to changes in water quality and water usage scenarios. Real-time monitoring of water quality parameters and dynamic adjustment of the primary and secondary roles and protection mechanisms during water production ensure stable effluent quality and safe system operation, compensating for the deficiencies in water quality control in traditional systems. After the water production cycle ends, the system updates the cumulative usage parameters and executes a matching flushing procedure, achieving accurate recording of filter cartridge usage status and preventing dead water zones and microbial growth within the system through differentiated flushing. This solves the problem of the single flushing and maintenance mechanism in traditional systems, ultimately achieving global optimal control over the filter cartridge lifespan, water-saving efficiency, and effluent quality of the dual reverse osmosis membrane water purification system. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0022] Figure 1 This is a flowchart illustrating an embodiment of an adaptive dynamic control method for a reverse osmosis water purification system provided in this application;

[0023] Figure 2 This is a schematic diagram of the structure of one embodiment of the reverse osmosis water purification system provided in this application;

[0024] Figure 3 This is another structural schematic diagram of an embodiment of a reverse osmosis water purification system provided in this application. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0027] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0028] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0029] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0030] As used in this specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrases "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0031] Example 1, see Figure 1 , Figure 1 This is a schematic flowchart of an embodiment of the adaptive dynamic control method for a reverse osmosis water purification system provided in this application, as shown below. Figure 1 As shown, the method includes steps 101-105, as detailed below:

[0032] Step 101: Obtain multiple status parameters of the reverse osmosis water purification system, wherein the multiple status parameters include at least the cumulative usage parameters, water quality-related parameters, and system water usage status parameters corresponding to each of the two water paths.

[0033] In one embodiment, after the system is powered on, the controller first drives all sensors, such as the raw water total dissolved solids sensor and the pure water total dissolved solids sensor, and the valves in the water circuit actuators to complete the initialization and reset the valves to the default closed state; then, the controller directly reads the historical data stored in the built-in non-volatile memory to obtain multiple status parameters of the reverse osmosis water purification system.

[0034] In one embodiment, the two reverse osmosis membrane filter elements include a first reverse osmosis membrane filter element and a second reverse osmosis membrane filter element.

[0035] In one embodiment, the two water passages include a first water passage with a first reverse osmosis membrane filter element as the main filter element and a second reverse osmosis membrane filter element as the auxiliary filter element, and a second water passage with a second reverse osmosis membrane filter element as the main filter element and a first reverse osmosis membrane filter element as the auxiliary filter element.

[0036] In one embodiment, acquiring multiple state parameters of the reverse osmosis water purification system specifically includes: acquiring the cumulative effective water production time corresponding to each of the water paths, as the cumulative usage parameter; acquiring the current raw water quality parameter and the current effluent water quality parameter, as the water quality related parameter; acquiring the system continuous standby time and / or recorded water usage duration, as the system water usage state parameter.

[0037] Preferably, when the reverse osmosis water purification system is a new machine, the cumulative effective water production time of the first reverse osmosis membrane filter element and the cumulative effective water production time of the second reverse osmosis membrane filter element read from the memory of the controller are both 0.

[0038] Specifically, when obtaining the current raw water quality parameters and the current effluent water quality parameters, the current total dissolved solids value of the raw water is collected as the current raw water quality parameter by means of a raw water total dissolved solids sensor installed on the raw water inlet water path of the reverse osmosis water purification system; and the current total dissolved solids value of the pure water is collected as the current effluent water quality parameter by means of a pure water total dissolved solids sensor installed on the pure water outlet water path of the reverse osmosis water purification system.

[0039] Preferably, the controller retrieves the last detected and stored water quality parameters from the memory, including the total dissolved solids value of raw water and the total dissolved solids value of purified water. When the water purification system is used as a new machine and has not been used, the total dissolved solids value of raw water and the total dissolved solids value of purified water are also read as 0 by default.

[0040] Specifically, regarding the system water usage status parameters, during the initialization phase, the controller will set the system's continuous standby time to 0 by default and start the timing module to accumulate the standby time. This timing data will serve as the core basis for the system water usage status parameters when a subsequent water production request is triggered.

[0041] In one embodiment, after acquiring multiple state parameters of the reverse osmosis water purification system, the method further includes: controlling the water circuit actuator of the reverse osmosis water purification system to execute an intelligent flushing program to pre-flushing the water circuit pipes in the reverse osmosis water purification system.

[0042] Specifically, when the water circuit actuator of the reverse osmosis water purification system executes the intelligent flushing program, the controller sends on / off commands to the water circuit actuator according to the parallel control logic, controlling the opening of the main inlet valve, the first inlet valve, the second inlet valve, the first outlet valve, the second outlet valve, the wastewater valve, and the return valve in the water circuit actuator, and controlling the start of the booster pump; so that the raw water enters the two reverse osmosis membrane filter elements through the inlet water circuit, and flows quickly through the entire pipeline through the parallel flow channel, discharging the stale water and pollutants in the pipeline with the water flow from the wastewater discharge port, thereby achieving a comprehensive cleaning of the filter pipeline.

[0043] Preferably, the main inlet valve, the first inlet valve, the second inlet valve, the first outlet valve, the second outlet valve, the wastewater valve, and the return valve are all configured as solenoid valves.

[0044] Specifically, the controller determines the specific mode and duration of intelligent pre-flushing based on the system's continuous standby time from the acquired system water status parameters, achieving adaptive matching of the flushing strategy. If the system's continuous standby time exceeds the preset system continuous standby time threshold, it is determined that the system is producing water for the first time after a long period of inactivity. The controller will then initiate a long-term intelligent pre-flushing, extending the flushing time to fully replace the stagnant water in the pipes and ensure the freshness of the water produced subsequently. If the system's continuous standby time does not exceed the preset system continuous standby time threshold, it is determined that the user is using water intermittently. The controller will then initiate a short-term intelligent flush, quickly cleaning the pipes while avoiding excessively long flushing that could affect the user's immediate water usage experience.

[0045] Preferably, when the controller performs intelligent flushing according to the determined intelligent pre-flushing mode and duration, if the high-pressure switch detects a user's water production request in real time, the controller will immediately interrupt the intelligent flushing process, send a shutdown command to the water circuit actuator, and shut down all solenoid valves and booster pumps involved in the flushing, without waiting for the pre-flushing time to complete; if no water production request is detected during the intelligent flushing process, after the controller completes the intelligent pre-flushing of the corresponding mode according to the preset time, it will shut down all solenoid valves and booster pumps involved in the flushing again to complete the pipeline cleaning and replacement.

[0046] Preferably, for the first startup after a long period of system inactivity, the controller will prioritize the parallel water production mode as the basic working mode. The core purpose is to quickly replace the stagnant water in the pipeline through the rapid water flow of parallel filtration by dual filters, and simultaneously push the stagnant water out through the wastewater valve. This not only avoids poor water quality in the first output, but also allows qualified pure water to be produced quickly without waiting for a complete pre-rinse process when the user's first water demand is triggered, completely avoiding the impact on the user experience due to user waiting time.

[0047] Step 102: When a water production request is detected, based on the multiple state parameters, a preset multi-factor decision-making algorithm is used to determine the primary and secondary roles of the two reverse osmosis membrane filter cartridges in the current water production cycle, as well as the optimal working mode for the current water production cycle.

[0048] In one embodiment, when a high-pressure switch in the reverse osmosis water purification system detects a faucet opening signal, a water production request is triggered; the controller responds to the water production request.

[0049] In one embodiment, determining the primary and secondary roles of the two reverse osmosis membrane filter cartridges in the current water production cycle based on the multiple state parameters and a preset multi-factor decision algorithm specifically includes: subtracting the cumulative usage parameters corresponding to the second water path from the cumulative usage parameters corresponding to the first water path to calculate the workload difference value of the water path; comparing the workload difference value of the water path with a preset equilibrium threshold; when the workload difference value of the water path is greater than the preset equilibrium threshold, determining the second reverse osmosis membrane filter cartridge as the primary filter cartridge and the first reverse osmosis membrane filter cartridge as the secondary filter cartridge; when the workload difference value of the water path is not greater than the negative value of the preset equilibrium threshold, determining the first reverse osmosis membrane filter cartridge as the primary filter cartridge and the second reverse osmosis membrane filter cartridge as the secondary filter cartridge; when the absolute value of the workload difference value of the water path is not greater than the preset equilibrium threshold, generating random numbers using a preset random number generation algorithm, and determining the primary and secondary roles of the first and second reverse osmosis membrane filter cartridges in the current water production cycle based on the numerical range of the random numbers.

[0050] Specifically, the main filter element and the auxiliary filter element are used to characterize the sequence of water flow in the series water treatment path: the main filter element is the first filter element in the series path to receive raw water for primary filtration, and the auxiliary filter element is the filter element in the series path to receive wastewater discharged from the main filter element for secondary filtration; since the auxiliary filter element treats the wastewater filtered by the main filter element, the wastewater pollutant concentration is much higher than that of the raw water. Therefore, the actual pollution load and wear rate of the auxiliary filter element are significantly greater than those of the main filter element. Based on the above wear characteristics, in order to balance the service life of the two reverse osmosis membrane filter elements, the controller performs main and auxiliary role allocation according to the difference in workload of the water path. When the difference in workload of the water path is greater than the preset balancing threshold, it indicates that the first water path... The workload of the first water path is greater than that of the second water path, and the second reverse osmosis membrane filter element in the first water path is a secondary filter element, resulting in greater cumulative losses. To balance these losses, when allocating primary and secondary roles, the second reverse osmosis membrane filter element is designated as the primary filter element, and the first reverse osmosis membrane filter element is designated as the secondary filter element. When the difference in workload between the water paths is not greater than the negative value of the preset balancing threshold, it indicates that the workload of the second water path is greater than that of the first water path, and the first reverse osmosis membrane filter element in the second water path is a secondary filter element, resulting in greater cumulative losses. Therefore, when allocating primary and secondary roles, the first reverse osmosis membrane filter element is designated as the primary filter element, and the second reverse osmosis membrane filter element is designated as the secondary filter element.

[0051] Specifically, the preset random number generation algorithm is a linear congruent generator, and the initial seed of the linear congruent generator is bound to the water outlet time of the reverse osmosis water purification system.

[0052] Specifically, the formula for the linear congruential generator is: ,in, The current state is represented by 'a', 'c', and 'm'. The multiplier, increment, and modulus are pre-stored parameters.

[0053] Specifically, determining the primary and secondary roles of the two reverse osmosis membrane filter cartridges in the current water production cycle based on the numerical range of the random number includes: presetting a first numerical range and a second numerical range, wherein the first numerical range and the second numerical range do not overlap and together cover the entire value range of the random number; when the random number falls within the first numerical range, the first reverse osmosis membrane filter cartridge is determined as the primary filter cartridge and the second reverse osmosis membrane filter cartridge is determined as the secondary filter cartridge; when the random number falls within the second numerical range, the second reverse osmosis membrane filter cartridge is determined as the primary filter cartridge and the first reverse osmosis membrane filter cartridge is determined as the secondary filter cartridge.

[0054] Specifically, when the absolute value of the difference in workload of the water path is not greater than the preset equalization threshold, the wear of the two filter elements is within the equalization range, and the controller generates a linear congruence generator. , Random numbers within the specified interval, and the initial seed. The randomness of the hot water flow from the reverse osmosis water purification system is enhanced by binding it to a random time; if the random number falls into... Within the specified range, the first reverse osmosis membrane filter element is the main filter element, and the second reverse osmosis membrane filter element is the auxiliary filter element; if it falls into [ In the interval, the second reverse osmosis membrane filter element is the main filter element, and the first reverse osmosis membrane filter element is the auxiliary filter element; and in the initial stage of filter element use, the multi-factor decision algorithm will reduce the decision weight of the filter element balance factor and increase the weight of the random factor to ensure that the initial use state of the two filter elements is balanced.

[0055] Preferably, during the current water production cycle, the controller dynamically updates the cumulative usage parameters of the two water paths. When the first reverse osmosis membrane filter is the main filter and the second reverse osmosis membrane filter is the auxiliary filter, the cumulative usage parameters of the first water path increase and the cumulative usage parameters of the second water path decrease. When the second reverse osmosis membrane filter is the main filter and the first reverse osmosis membrane filter is the auxiliary filter, the cumulative usage parameters of the second water path increase and the cumulative usage parameters of the first water path decrease, providing real-time updated status parameters for the main and auxiliary role decision-making in the next water production cycle.

[0056] In one embodiment, determining the optimal operating mode for the current water production cycle based on the multiple state parameters using a preset multi-factor decision algorithm specifically includes: determining a basic operating mode for the current water production cycle from multiple preset operating modes according to the system water usage state parameters. The basic operating mode includes at least the series and / or parallel water production relationship of the two reverse osmosis membrane filter cartridges during the water production process. The system water usage state parameters include the system continuous standby time and / or recorded water usage duration. Adjusting the operating parameters under the basic operating mode according to the water quality-related parameters and the system water usage state parameters to form the optimal operating mode for the current water production cycle, the adjustment includes at least one of the following: adjusting the wastewater discharge ratio for the current water production cycle, adjusting the flushing program type executed after the current water production cycle ends, or triggering a zero-stagnant-water flushing mode in standby mode.

[0057] Specifically, the multiple preset operating modes include a series water production mode, a parallel water production mode, and a combination of series and parallel water production modes. In the series water production mode, two reverse osmosis membrane filter elements are connected in series, with raw water flowing sequentially through both filter elements for step-by-step purification, focusing on efficient and stable production of pure water. In this mode, the order of the main and auxiliary filter elements is dynamically switched, allowing for alternating distribution of the high-pollution-load concentrate filtration station, effectively avoiding clogging caused by long-term unidirectional operation of the filter elements and ensuring long-term stable operation. In the parallel water production mode, two reverse osmosis membrane filter elements are connected in parallel, with raw water being diverted and flowing synchronously through both membrane elements. The filter cartridge focuses on the comprehensive purification and replacement of the entire water circuit, quickly draining stagnant water and ensuring clean water throughout the flow path. This mode is a short-term operation mode, avoiding the long-term independent water production of the two filter cartridges, thus mitigating the clogging issues common with traditional parallel operation of dual filter cartridges. The combination of series and parallel water production modes allows for compatibility with both series and parallel water circuit connections during the water production process. It can be switched in stages to adapt to different water production needs. For example, the parallel water production mode can be used to complete the purification and replacement of the entire water circuit before switching to the series water production mode for efficient and stable pure water production. The combined operation of these two modes balances pipe cleanliness, water production efficiency, and filter cartridge lifespan, achieving optimal overall system performance.

[0058] In one embodiment, determining the basic operating mode of the current water production cycle from multiple preset operating modes based on the system water usage status parameters specifically includes: obtaining the continuous standby time of the system before the current water production cycle; comparing the continuous standby time of the system with a preset standby threshold; when the continuous standby time of the system exceeds the preset standby threshold, determining that the basic operating mode of the current water production cycle includes at least one of the following: a series water production mode, or a combination of a series water production mode and a parallel water production mode; when the continuous standby time of the system is less than or equal to the preset standby threshold, determining that the basic operating mode of the current water production cycle is a series water production mode; wherein, the water circuit connection relationship corresponding to the series water production mode is that the two reverse osmosis membrane filter elements are connected in series, and the water circuit connection relationship corresponding to the parallel water production mode is that the two reverse osmosis membrane filter elements are connected in parallel.

[0059] Specifically, the controller compares the acquired continuous standby time of the system with the preset standby threshold. Based on the comparison result, it selects the corresponding basic working mode from the preset working modes. If the continuous standby time of the system exceeds the preset standby threshold, it indicates that the reverse osmosis water purification system has been idle for a long time. The user is more likely to need to quickly obtain a sufficient amount of fresh pure water this time. At this time, the basic working mode of the current water production cycle is determined to be the parallel water production mode, or a combination of the series water production mode and the parallel water production mode. Among them, the parallel water production mode uses the valve coordinated control of the water circuit actuator to allow the raw water to enter two reverse osmosis membrane filter cartridges simultaneously. The two filter cartridges independently complete filtration and then merge to produce water. The core advantage is pipeline purification. The series-parallel combination mode switches the water circuit according to the needs of the water production stage. For example, the parallel mode is used in the early stage to quickly produce water to purify the pipeline, and the series mode is switched in the later stage to enhance purification, achieving rapid water output and efficient filtration, and also preventing one-way clogging of the filter cartridges.

[0060] Specifically, if the system's continuous standby time is less than or equal to the preset standby threshold, it is determined that the user uses water intermittently, such as turning on the tap multiple times in a short period of time. In this case, the core requirement is to ensure the stability and consistency of the water quality. Therefore, the basic working mode is determined to be the series water production mode. In this mode, the water circuit actuator will adjust the valve status so that the raw water flows through the first reverse osmosis membrane filter and the second reverse osmosis membrane filter in sequence. Through two-stage filtration, impurities, heavy metals and other pollutants in the raw water are fully intercepted, so as to maximize the purity and stability of the water quality.

[0061] In one embodiment, adjusting the operating parameters under the basic working mode based on the water quality-related parameters and the system water usage status parameters to form the optimal working mode for the current water production cycle specifically includes: adjusting the wastewater discharge ratio of the current water production cycle based on the comparison result of the water quality-related parameters and a first preset threshold; adjusting the flushing program type executed after the current water production cycle ends based on the comparison result of the recorded water usage duration and a second preset threshold; and triggering a zero-stagnant-water flushing mode in the standby state based on the comparison result of the system's continuous standby time and a third preset threshold.

[0062] Specifically, the controller first dynamically adjusts the wastewater discharge ratio based on the comparison results of water quality-related parameters and a first preset threshold. For example, the controller collects raw water quality parameters in real time and compares them with the preset first water quality threshold. When the raw water quality parameters are higher than the first preset threshold, it is determined that the raw water pollution load is high. The controller then controls the wastewater valve in the water circuit actuator to open, thereby increasing the wastewater discharge ratio. By increasing the concentrated water discharge, impurities are reduced in the filter element, ensuring the purification effect and filter element life. When the raw water quality parameters are lower than the first preset threshold, the controller then controls the wastewater valve in the water circuit actuator to close, appropriately reducing the wastewater discharge ratio. This improves water resource utilization while ensuring that the effluent meets standards, thereby extending the service life of the dual membrane and ensuring water quality stability.

[0063] Preferably, when the raw water quality parameters are higher than the first preset threshold, after opening the wastewater valve, the raw water quality parameters are constantly monitored, and the wastewater valve is closed again only when the raw water quality parameters are lower than the fourth preset threshold, so as to prevent valve vibration from affecting the stability of the system; wherein, the fourth preset threshold is greater than the first preset threshold, and the fourth preset threshold is obtained by adding a preset threshold to the first preset threshold.

[0064] Specifically, the controller adjusts the flushing program type after the water production cycle ends based on the comparison between the recorded water usage duration and the second preset threshold. For example, the controller retrieves the recorded water usage duration of the current water production cycle and compares it with the second preset threshold. If the recorded water usage duration exceeds the second preset threshold, it is determined that the system has a high risk of static contamination, and the controller sets it to a long-lasting flushing program to extend the flushing duration to thoroughly clean the filter and pipeline. If the recorded water usage duration does not exceed the second preset threshold, it sets it to a short-lasting flushing program to quickly clean the pipeline and reduce water consumption, thus achieving a precise match between the flushing strategy and the water usage scenario.

[0065] Specifically, based on the comparison between the system's continuous standby time and the third preset threshold, the controller intelligently triggers the zero-stagnant water flushing mode in standby mode. If the system's continuous standby time exceeds the third preset threshold, the controller will actively control the water circuit actuator to start the zero-stagnant water flushing without waiting for a water production request to be triggered, replacing the stagnant water that has been sitting in the pipeline for a long time, ensuring that users can obtain fresh pure water on their first use.

[0066] In one embodiment, the optimal operating mode of the current water production cycle includes the basic operating mode and the type of flushing procedure to be executed after the current water production cycle ends, such as parallel water production mode + series water production mode + long-term flushing procedure or series water production mode + short-term flushing procedure, etc.

[0067] Step 103: Based on the optimal working mode and the primary and secondary roles, dynamically control the water circuit actuator of the reverse osmosis water purification system to adjust the water circuit connection relationship of the two reverse osmosis membrane filter elements.

[0068] In one embodiment, based on the optimal operating mode, the target water flow path corresponding to the current water production cycle is determined; based on the primary and secondary roles, the connection order of the two reverse osmosis membrane filter cartridges in the target water flow path is determined; based on the target water flow path and the connection order, the on / off states of the corresponding valves and pumps in the water circuit actuator are controlled, so that the water circuit of the reverse osmosis water purification system is switched to a water circuit connection relationship that matches the optimal operating mode and the primary and secondary roles.

[0069] Specifically, when the optimal operating mode is the series water production mode, the controller first determines the water flow direction based on the allocation of primary and secondary roles. If the first reverse osmosis membrane filter is the primary filter and the second reverse osmosis membrane filter is the secondary filter, the target water flow path includes three sub-paths: Sub-path one, raw water enters the first reverse osmosis membrane filter through the main inlet valve, booster pump, and first inlet valve for purification treatment. The pure water produced by the first reverse osmosis membrane filter flows out through the pure water outlet of the first reverse osmosis membrane filter, and then passes through the post-carbon filter, the fifth check valve, and the high-pressure switch to the pure water outlet; Sub-path two, the first reverse osmosis membrane filter produces... The wastewater produced flows through the second check valve to the inlet of the second reverse osmosis membrane filter element. After filtration by the second reverse osmosis membrane filter element, a portion of the wastewater flows out through the wastewater outlet of the second reverse osmosis membrane filter element and then flows back to the inlet of the first reverse osmosis membrane filter element through the third check valve in the return pipeline to continue filtration. Another portion of the wastewater produced by the second reverse osmosis membrane filter element flows out through the wastewater outlet of the second reverse osmosis membrane filter element and is discharged through the second outlet valve, wastewater valve, and wastewater outlet. In sub-path three, the pure water produced by the second reverse osmosis membrane filter element flows through the post-carbon filter element, the fifth check valve, and the high-pressure switch in sequence to the pure water outlet. Accordingly, the controller opens the main inlet valve, booster pump, first inlet valve, and second outlet valve, and closes the reflux valve, first outlet valve, and second inlet valve; simultaneously, it ensures that the reflux path from the wastewater outlet of the second reverse osmosis membrane filter element to the inlet of the first reverse osmosis membrane filter element is unobstructed; if the main and auxiliary roles are reversed, with the second reverse osmosis membrane filter element as the main filter element and the first reverse osmosis membrane filter element as the auxiliary filter element, then the target water flow path includes three sub-paths: Sub-path one, raw water enters the second reverse osmosis membrane filter element for purification treatment through the main inlet valve, booster pump, and second inlet valve; the pure water produced by the second reverse osmosis membrane filter element flows out through the pure water outlet of the second reverse osmosis membrane filter element, and passes sequentially through the post-carbon filter element, the fifth check valve, and... The high-pressure switch directs the water to the pure water outlet. Sub-path two: wastewater from the second reverse osmosis membrane filter flows through the third check valve to the inlet of the first reverse osmosis membrane filter. A portion of the wastewater from the first reverse osmosis membrane filter flows out through its wastewater outlet and then back through the second check valve in the return pipe to the inlet of the second reverse osmosis membrane filter for further filtration. Another portion of the wastewater from the first reverse osmosis membrane filter flows out through its wastewater outlet and is then discharged through the first outlet valve, wastewater valve, and wastewater outlet. Sub-path three: pure water from the first reverse osmosis membrane filter flows sequentially through the post-carbon filter, the fifth check valve, and the high-pressure switch to the pure water outlet. Correspondingly, the controller opens the main inlet valve, booster pump, second inlet valve, and first outlet valve, and closes the return valve, first inlet valve, and second outlet valve, while ensuring a smooth return path from the wastewater outlet of the first reverse osmosis membrane filter to the inlet of the second reverse osmosis membrane filter.

[0070] Specifically, when the optimal working mode is the parallel water production mode, the controller does not consider the difference between the main and auxiliary roles. The target water flow path is the parallel filtration of raw water in two separate channels. It directly controls the main inlet valve, booster pump, first inlet valve, second inlet valve, first outlet valve, second outlet valve, reflux valve, and wastewater valve to open simultaneously, so that the raw water flows into the two reverse osmosis membrane filter elements in parallel. The pure water produced flows out after merging through their respective pure water outlets, realizing full pipeline circulation.

[0071] Specifically, when the optimal working mode is intelligent flushing mode, the target water flow path is parallel circulation flushing + rapid sewage discharge. For example, the raw water is divided into two paths after passing through the main inlet valve and the booster pump. The first path: enters the first reverse osmosis membrane filter element through the first inlet valve, and the wastewater discharged through the wastewater outlet of the first reverse osmosis membrane filter element is discharged through the first outlet valve and the wastewater valve and then discharged through the wastewater outlet. The second path: enters the second reverse osmosis membrane filter element through the second inlet valve, and the wastewater discharged through the wastewater outlet of the second reverse osmosis membrane filter element is discharged through the second outlet valve and the wastewater valve and then discharged through the wastewater outlet. During this process, the controller controls all inlet valves, outlet valves, wastewater valves and return valves to open in parallel water production mode, and starts the booster pump, so that the water flows at high speed through the two reverse osmosis membrane filter elements and is discharged directly from the wastewater outlet to quickly flush the pollutants on the filter element surface.

[0072] Specifically, when the optimal operating mode is the zero-stagnant-water flushing mode, the controller triggers periodically during standby. First, it controls the valves according to the primary and secondary relationship of the previous water production cycle, causing the water flow to flush the filter cartridges in series. Then, it reverses the primary and secondary roles and flushes again. That is, it first controls the first reverse osmosis membrane filter cartridge as the primary filter cartridge and the second reverse osmosis membrane filter cartridge as the secondary filter cartridge in series, and then switches to the second reverse osmosis membrane filter cartridge as the primary filter cartridge and the first reverse osmosis membrane filter cartridge as the secondary filter cartridge in series. During this period, the corresponding inlet valve, outlet valve and wastewater valve are opened alternately to allow the water flow to alternately flush the membrane surface of the two filter cartridges. Finally, the water is discharged from the wastewater outlet to maintain the cleanliness of the system.

[0073] Preferably, when controlling the valves according to the primary and secondary relationship of the previous water production cycle, the main inlet valve, booster pump, first inlet valve, second outlet valve, and wastewater valve are opened; the reflux valve and the branch valve of the post-carbon filter are closed; the water flow path is raw water - first reverse osmosis membrane filter - second reverse osmosis membrane filter - wastewater discharge; when reversing the primary and secondary roles for flushing, the main inlet valve, booster pump, second inlet valve, first outlet valve, and wastewater valve are opened; the reflux valve and the branch valve of the post-carbon filter are closed; the water flow path is raw water - second reverse osmosis membrane filter - first reverse osmosis membrane filter - wastewater discharge.

[0074] Step 104: During the water production process, monitor the water quality-related parameters in real time, and dynamically adjust the primary and secondary roles or trigger the protection mechanism based on the comparison results of the water quality-related parameters with the corresponding preset thresholds.

[0075] In one embodiment, the water quality-related parameters are monitored in real time, including raw water quality parameters and effluent water quality parameters. When the effluent water quality parameters exceed the raw water quality parameters and the duration exceeds a first preset duration, a protection mechanism is triggered, generating a water quality anomaly alert. When the effluent water quality parameters exceed a preset water quality threshold and the duration exceeds a second preset duration, the primary and secondary roles of the two reverse osmosis membrane filter elements are switched, and after the switch, the effluent water quality parameters are re-evaluated to determine whether they exceed the preset water quality threshold, until the primary and secondary role relationship that optimizes the effluent water quality is determined.

[0076] Specifically, when the controller detects that the output water quality parameters exceed the raw water quality parameters, and the duration of this abnormal state reaches the first preset time, the protection mechanism is immediately triggered. At this time, the system determines that a core fault has occurred in the water purification process, such as filter failure or water circuit abnormality leading to ineffective filtration. The controller will simultaneously generate water quality abnormality prompt information, which can be notified to the user through device indicator light flashing, buzzer alarm, or APP push notification. At the same time, the water production process is suspended to prevent unqualified water from flowing out and ensure water safety.

[0077] Specifically, if the effluent water quality parameters detected during the water production process exceed the preset water quality threshold, and the duration of this exceeding state reaches the second preset duration, a primary / secondary role switching mechanism is activated to optimize water quality. The controller first sends instructions to the water circuit actuator to adjust the on / off state of relevant valves, switching the primary and secondary roles of the two reverse osmosis membrane filter cartridges. After the switching is completed, the controller continues to monitor the effluent water quality parameters under the new role configuration in real time through sensors to determine whether they still exceed the preset water quality threshold. If the water quality meets the standard after the switch, the current primary / secondary role relationship is maintained. If it still does not meet the standard, the switching operation can be repeated until a primary / secondary role relationship that minimizes the effluent water quality parameters and meets the threshold requirements is found, ensuring optimal effluent water quality in subsequent water production processes. The entire process achieves dynamic optimization and safety fault tolerance of water quality through a closed-loop logic of monitoring-judgment-switching-re-evaluation.

[0078] Step 105: After the water production cycle ends, update the cumulative usage parameters, and control the reverse osmosis water purification system to execute a flushing program that matches the optimal working mode before entering standby mode.

[0079] In one embodiment, after the current water production cycle ends, the actual operating time of the two reverse osmosis membrane filter cartridges during the current water production cycle is obtained; based on the actual operating time, the cumulative usage parameters corresponding to each of the two water paths are updated respectively; based on the optimal working mode of the current water production cycle, the corresponding flushing program type is determined; the water path actuator of the reverse osmosis water purification system is controlled to execute the flushing program corresponding to the flushing program type to flush the two reverse osmosis membrane filter cartridges until the flushing program is completed, and then all valves in the water path actuator are controlled to close, so that the reverse osmosis water purification system enters a low-power standby state.

[0080] Specifically, at the end of the current water production cycle, the controller obtains the actual operating time of the two reverse osmosis membrane filter cartridges during the current water production cycle in real time. This actual operating time is accurately calculated based on the roles of the main and auxiliary filter cartridges determined in this water production cycle. When the first reverse osmosis membrane filter cartridge is the main filter cartridge and the second reverse osmosis membrane filter cartridge is the auxiliary filter cartridge, the cumulative usage parameters corresponding to the first water path are updated based on the actual operating time of the first water path. When the second reverse osmosis membrane filter cartridge is the main filter cartridge and the first reverse osmosis membrane filter cartridge is the auxiliary filter cartridge, the cumulative usage parameters corresponding to the second water path are updated based on the actual operating time of the second water path.

[0081] Specifically, based on the actual running time obtained from statistics, the controller updates the cumulative usage parameters corresponding to the two water paths respectively. The actual running time of the first water path in this water production cycle is added to its cumulative effective water production time, and the actual running time of the second water path in this water production cycle is added to its cumulative effective water production time. The updated cumulative effective water production time of the first water path and the cumulative effective water production time of the second water path are stored in the system memory to provide the latest filter cartridge usage data for the primary and secondary role decisions in subsequent water production cycles.

[0082] Specifically, the controller determines the optimal working mode based on the current water production cycle, and combines this with the established relationship between the main and auxiliary filter cartridges to match and determine the corresponding flushing program type. This flushing program is adapted to the optimal working mode and can perform targeted cleaning and maintenance on the filter cartridges and water circuit.

[0083] Specifically, the controller sends control commands to the water circuit actuators to execute the matched flushing program, flushing the two reverse osmosis membrane filter cartridges and the entire water circuit system. After the flushing program is fully executed according to the preset procedure, the controller controls all valves in the water circuit actuators to close, and simultaneously shuts down power components such as the booster pump, putting the reverse osmosis water purification system into a low-power standby state, waiting for the next water production request to be triggered.

[0084] Example 2, see Figure 2-3 , Figure 2This is a schematic diagram of one embodiment of a reverse osmosis water purification system provided in this application. Figure 3 This is another structural schematic diagram of an embodiment of a reverse osmosis water purification system provided in this application, as shown below. Figure 2 As shown, the reverse osmosis water purification system includes two reverse osmosis membrane filter elements 1, a high-pressure switch 2, a sensing unit 3, a water circuit actuator 4, and a controller 5, as detailed below:

[0085] Two reverse osmosis membrane filter elements 1, wherein the two reverse osmosis membrane filter elements 1 include a first reverse osmosis membrane filter element 11 and a second reverse osmosis membrane filter element 12; a high-pressure switch 2 for detecting water production requests; a sensing unit 3 for collecting multiple status parameters of the reverse osmosis water purification system, wherein the multiple status parameters include at least the cumulative usage parameters of the two water circuits, water quality-related parameters, and system water usage status parameters; a water circuit actuator 4 for adjusting the water circuit connection relationship of the two reverse osmosis membrane filter elements 1 during the water production process; and a controller 5 electrically connected to the sensing unit 3, the water circuit actuator 4, and the high-pressure switch 2, wherein the controller 5 is configured to execute the adaptive dynamic control method described above.

[0086] In one embodiment, the water circuit actuator 4 includes: a main inlet valve 41, disposed on the raw water inlet line of the reverse osmosis water purification system; a booster pump 42, disposed on the raw water inlet line downstream of the main inlet valve 41; a first inlet valve 43, disposed at the inlet of the first reverse osmosis membrane filter element 11; a second inlet valve 44, disposed at the inlet of the second reverse osmosis membrane filter element 12; a first outlet valve 45, disposed at the wastewater outlet of the first reverse osmosis membrane filter element 11; a second outlet valve 46, disposed at the wastewater outlet of the second reverse osmosis membrane filter element 12; a wastewater valve 47, disposed on the wastewater line between the wastewater outlets and wastewater discharge ports of the two reverse osmosis membrane filter elements 1; and a reflux valve 48. The following valves are installed in the return water path between the pure water outlet and the inlet of the two reverse osmosis membrane filter elements 1: a first check valve 491, installed in the water path between the pure water outlet of the first reverse osmosis membrane filter element 11 and the return valve 48; a second check valve 492, installed between the wastewater outlet of the first reverse osmosis membrane filter element 11 and the inlet of the second reverse osmosis membrane filter element 12; a third check valve 493, installed between the wastewater outlet of the second reverse osmosis membrane filter element 12 and the inlet of the first reverse osmosis membrane filter element 11; a fourth check valve 494, installed on the bypass pipe connecting the raw water inlet and the wastewater discharge pipe; and a fifth check valve 495, installed on the pure water drain pipe of the reverse osmosis water purification system.

[0087] Specifically, the main inlet valve 41 is located at the beginning of the raw water inlet circuit of the reverse osmosis water purification system to control the overall flow of raw water; the booster pump 42 is located downstream of the main inlet valve 41 in the raw water inlet circuit to provide water pressure for the water purification and flushing processes; the first inlet valve 43 is located at the inlet of the first reverse osmosis membrane filter element 11 to independently control the flow of water into the first reverse osmosis membrane filter element 11; the second inlet valve 44 is located at the inlet of the second reverse osmosis membrane filter element 12 to independently control the flow of water into the second reverse osmosis membrane filter element 12; and the first outlet valve 45 is located at the inlet of the first reverse osmosis membrane filter element 12. At the wastewater outlet of the first reverse osmosis membrane filter element 11, the flow of concentrated water from the first reverse osmosis membrane filter element 11 is controlled. A second outlet valve 46 is located at the wastewater outlet of the second reverse osmosis membrane filter element 12 to control the flow of wastewater from the second reverse osmosis membrane filter element 12. A wastewater valve 47 is located on the wastewater path between the wastewater confluence of the two reverse osmosis membrane filter elements 1 and the wastewater discharge outlet, used to adjust the wastewater discharge ratio and control wastewater discharge. A reflux valve 48 is located on the reflux path between the pure water outlet and the filter element inlet of the two reverse osmosis membrane filter elements 1, used to achieve reflux reuse and improve the system's water recovery rate.

[0088] Specifically, the first check valve 491 is used to prevent water in the return pipeline from flowing back to the pure water side of the first reverse osmosis membrane filter element 11; the second check valve 492 is used to prevent water from the inlet side of the second reverse osmosis membrane filter element 12 from flowing back to the wastewater side of the first reverse osmosis membrane filter element 11, ensuring that wastewater flows unidirectionally from the first reverse osmosis membrane filter element 11 to the second reverse osmosis membrane filter element 12 for secondary purification in the series water production mode (first reverse osmosis membrane filter element 11 - second reverse osmosis membrane filter element 12); the third check valve 493 is used to prevent water from the inlet side of the first reverse osmosis membrane filter element 11 from flowing back to the wastewater side. The wastewater is poured into the wastewater side of the second reverse osmosis membrane filter element 12. In the reverse series water production mode (second reverse osmosis membrane filter element 12 - first reverse osmosis membrane filter element 11), the wastewater is ensured to flow unidirectionally from the second reverse osmosis membrane filter element 12 to the first reverse osmosis membrane filter element 11. The fourth check valve 494 is used to prevent raw water from being discharged directly from the wastewater pipeline without filtration. The fifth check valve 495 is used to prevent pure water from flowing back to the filter element side at the user end, maintain the pressure stability of the pure water output pipeline, and at the same time prevent external or sewage from entering the pure water side with the backflow, ensuring the safety of the output water quality and avoiding secondary pollution of the purified pure water.

[0089] In one embodiment, the reverse osmosis water purification system further includes the post-carbon filter 6; the post-carbon filter 6 is located downstream of the confluence of the pure water outlets of the two reverse osmosis membrane filter cartridges 1, and is used to perform post-treatment on the purified pure water, adsorb residual chlorine, and improve the taste of the water.

[0090] In one embodiment, the sensing unit 3 specifically includes: a raw water total dissolved solids sensor 31 located upstream of the booster pump 42 in the raw water inlet channel, a pure water total dissolved solids sensor 32 located downstream of the post-carbon filter 6 in the pure water outlet channel, a timing module, and a non-volatile memory; wherein, the raw water total dissolved solids sensor 31 and the pure water total dissolved solids sensor 32 are used to collect water quality parameters, the timing module is used to count the standby time and the running time, and the non-volatile memory is used to store the cumulative usage parameters of the two water channels.

[0091] In one embodiment, the controller 5 is the core control unit of the system and is a micro control unit, which is electrically connected to the high-pressure switch 2, the sensing unit 3, and the water circuit actuator 4 respectively. The controller 5 is configured to execute the adaptive dynamic control method of the reverse osmosis water purification system described in any of the foregoing embodiments, and realize functions such as state parameter acquisition, multi-factor decision-making, control of the water circuit actuator 4, allocation of filter cartridge main and auxiliary roles, real-time water quality monitoring, cumulative parameter update and intelligent flushing.

[0092] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0093] In the embodiments provided in this application, it should be understood that the disclosed systems and methods can be implemented in other ways. For example, the system embodiments described above are merely illustrative. For example, the division of each unit is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0094] The steps in the methods of this application embodiment can be adjusted, merged, or deleted according to actual needs. The units in the system of this application embodiment can be merged, divided, or deleted according to actual needs. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0095] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a terminal, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0096] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0097] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0098] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An adaptive dynamic control method for a reverse osmosis water purification system, characterized in that, Applied to a reverse osmosis water purification system comprising two reverse osmosis membrane filter cartridges, the method includes: Acquire multiple state parameters of the reverse osmosis water purification system, wherein the multiple state parameters include at least the cumulative usage parameters, water quality-related parameters, and system water usage status parameters corresponding to each of the two water paths; When a water production request is detected, based on the multiple state parameters, a preset multi-factor decision-making algorithm is used to determine the primary and secondary roles of the two reverse osmosis membrane filter cartridges in the current water production cycle, as well as the optimal working mode for the current water production cycle. Based on the optimal working mode and the primary and secondary roles, the water circuit actuator of the reverse osmosis water purification system is dynamically controlled to adjust the water circuit connection relationship of the two reverse osmosis membrane filter elements. During the water production process, the water quality-related parameters are monitored in real time, and the primary and secondary roles are dynamically adjusted or the protection mechanism is triggered based on the comparison results of the water quality-related parameters with the corresponding preset thresholds. After the water production cycle ends, the cumulative usage parameters are updated, and the reverse osmosis water purification system is controlled to execute a flushing procedure that matches the optimal working mode before entering standby mode. The two reverse osmosis membrane filter elements include a first reverse osmosis membrane filter element and a second reverse osmosis membrane filter element; the two water passages include a first water passage with the first reverse osmosis membrane filter element as the main filter element and the second reverse osmosis membrane filter element as the auxiliary filter element, and a second water passage with the second reverse osmosis membrane filter element as the main filter element and the first reverse osmosis membrane filter element as the auxiliary filter element. Based on the multiple state parameters, a preset multi-factor decision-making algorithm is used to determine the primary and secondary roles of the two reverse osmosis membrane filter cartridges in the current water production cycle, specifically including: Subtract the cumulative usage parameters of the second waterway from the cumulative usage parameters of the first waterway to calculate the difference in workload of the waterway. Compare the difference in workload of the waterway pathway with a preset equalization threshold; When the difference in workload of the water path is greater than the preset equalization threshold, the second reverse osmosis membrane filter element is determined as the main filter element, and the first reverse osmosis membrane filter element is determined as the auxiliary filter element. When the difference in workload of the water path is not greater than the negative value of the preset equalization threshold, the first reverse osmosis membrane filter element is determined as the main filter element, and the second reverse osmosis membrane filter element is determined as the auxiliary filter element. When the absolute value of the difference in workload of the water path is not greater than the preset balance threshold, a random number is generated by a preset random number generation algorithm, and the primary and secondary roles of the first reverse osmosis membrane filter and the second reverse osmosis membrane filter in the current water production cycle are determined based on the numerical range of the random number. The process of determining the optimal operating mode for the current water production cycle based on the multiple state parameters and a preset multi-factor decision-making algorithm specifically includes: Based on the system water usage status parameters, the basic working mode of the current water production cycle is determined from multiple preset working modes. The basic working mode includes at least the series and / or parallel water production relationship of the two reverse osmosis membrane filter cartridges in the water production process. The system water usage status parameters include the system continuous standby time and / or recorded water usage duration. Based on the water quality parameters and the system water usage parameters, the operating parameters under the basic working mode are adjusted to form the optimal working mode for the current water production cycle. The adjustment includes at least one of the following: adjusting the wastewater discharge ratio for the current water production cycle, adjusting the flushing program type executed after the current water production cycle ends, or triggering a zero-stagnant-water flushing mode in standby mode.

2. The method as described in claim 1, characterized in that, The step of determining the basic operating mode for the current water production cycle from multiple preset operating modes based on the system water usage status parameters specifically includes: Obtain the continuous standby time of the system before the current water production cycle; The continuous standby time of the system is compared with a preset standby threshold; When the continuous standby time of the system exceeds the preset standby threshold, the basic working mode of the current water production cycle is determined to include at least one of the following: series water production mode, or a combination of series water production mode and parallel water production mode. When the continuous standby time of the system is less than or equal to the preset standby threshold, the basic working mode of the current water production cycle is determined to be the series water production mode. The water circuit connection relationship corresponding to the series water production mode is that the two reverse osmosis membrane filter elements are connected in series, and the water circuit connection relationship corresponding to the parallel water production mode is that the two reverse osmosis membrane filter elements are connected in parallel.

3. The method as described in claim 1, characterized in that, The step of adjusting the operating parameters under the basic operating mode based on the water quality-related parameters and the system water usage status parameters to form the optimal operating mode for the current water production cycle specifically includes: Based on the comparison results between the water quality-related parameters and the first preset threshold, the wastewater discharge ratio of the current water production cycle is adjusted. Based on the comparison result between the recorded water usage duration and the second preset threshold, the type of flushing procedure to be executed after the current water production cycle ends is adjusted. Based on the comparison result between the continuous standby time of the system and the third preset threshold, the zero-stagnant water flushing mode is triggered in the standby state.

4. The method as described in claim 1, characterized in that, The step of dynamically controlling the water circuit actuators of the reverse osmosis water purification system according to the optimal working mode and the primary and secondary roles, in order to adjust the water circuit connection relationship of the two reverse osmosis membrane filter elements, specifically includes: Based on the optimal working mode, determine the target water flow path corresponding to the current water production cycle; Based on the primary and secondary roles, determine the connection order of the two reverse osmosis membrane filter elements in the target water flow path; Based on the target water flow path and the access sequence, the on / off states of the corresponding valves and pumps in the water flow actuator are controlled so that the water flow of the reverse osmosis water purification system is switched to a water flow connection relationship that matches the optimal working mode and the primary and secondary roles.

5. The method as described in claim 1, characterized in that, The real-time monitoring of water quality-related parameters, and the dynamic adjustment of the primary and secondary roles or the triggering of protection mechanisms based on the comparison results of the water quality-related parameters with corresponding preset thresholds, specifically includes: Real-time monitoring of the water quality-related parameters, including raw water quality parameters and effluent water quality parameters; When the effluent water quality parameters exceed the raw water quality parameters and the duration exceeds the first preset time, a protection mechanism is triggered, and an abnormal water quality warning message is generated. When the effluent water quality parameters exceed the preset water quality threshold and the duration exceeds the second preset duration, the primary and secondary roles of the two reverse osmosis membrane filter elements are switched, and after the switch, the effluent water quality parameters are re-evaluated to see if they exceed the preset water quality threshold, until the primary and secondary role relationship that optimizes the effluent water quality is determined.

6. The method as described in claim 1, characterized in that, After the water production cycle ends, the cumulative usage parameters are updated, and the reverse osmosis water purification system is controlled to execute a flushing procedure matching the optimal working mode before entering standby mode. Specifically, this includes: After the current water production cycle ends, obtain the actual operating time of the two reverse osmosis membrane filter cartridges during this water production cycle; Update the cumulative usage parameters corresponding to each of the two waterway passages based on the actual running time. Based on the optimal working mode of the current water production cycle, determine the corresponding flushing procedure type; The water circuit actuator of the reverse osmosis water purification system is controlled to execute the flushing program corresponding to the flushing program type to flush the two reverse osmosis membrane filter elements. After the flushing program is completed, all valves in the water circuit actuator are controlled to close, so that the reverse osmosis water purification system enters a low-power standby state.

7. A reverse osmosis water purification system, characterized in that, The system includes: Two reverse osmosis membrane filter elements, wherein the two reverse osmosis membrane filter elements include a first reverse osmosis membrane filter element and a second reverse osmosis membrane filter element; High-pressure switch, used to detect water production requests; The sensing unit is used to collect multiple status parameters of the reverse osmosis water purification system, wherein the multiple status parameters include at least the cumulative usage parameters of two water paths, water quality related parameters, and system water usage status parameters. The water circuit actuator is used to adjust the water circuit connection relationship between the two reverse osmosis membrane filter elements during the water production process. The controller is electrically connected to the sensing unit, the water circuit actuator and the high-voltage switch respectively, and the controller is configured to perform the adaptive dynamic control method as described in any one of claims 1 to 6.

8. The reverse osmosis water purification system as described in claim 7, characterized in that, The waterway actuator includes: The main inlet valve is installed on the raw water inlet line of the reverse osmosis water purification system. A booster pump is installed on the raw water inlet line downstream of the main inlet valve; The first inlet valve is located at the inlet of the first reverse osmosis membrane filter element; The second inlet valve is located at the inlet of the second reverse osmosis membrane filter element; The first outlet valve is located at the wastewater outlet of the first reverse osmosis membrane filter element; The second outlet valve is located at the wastewater outlet of the second reverse osmosis membrane filter element; A wastewater valve is installed on the wastewater path between the wastewater outlet and the wastewater discharge outlet of the two reverse osmosis membrane filter elements; A reflux valve is installed on the reflux water path between the pure water outlet and the inlet of the two reverse osmosis membrane filter elements; The first check valve is installed in the water path between the pure water outlet of the first reverse osmosis membrane filter element and the reflux valve; The second check valve is located between the wastewater outlet of the first reverse osmosis membrane filter element and the water inlet of the second reverse osmosis membrane filter element. The third check valve is located between the wastewater outlet of the second reverse osmosis membrane filter element and the inlet of the first reverse osmosis membrane filter element. The fourth check valve is installed on the bypass pipe connecting the raw water inlet and the wastewater discharge pipe; The fifth check valve is installed on the pure water drain pipe of the reverse osmosis water purification system.

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