Flushing control method of waterway system, waterway system and water purification equipment

Abstract

The invention relates to the technical field of water path system control, and discloses a flushing control method of a water path system, the water path system and a water purifying device.The method comprises the steps that the water path system is controlled to inject pure water generated through filtration of an RO membrane assembly into a water storage tank to be stored till the water storage completion condition is met; after water storage is completed, the wastewater pipeline is opened, the booster pump is started, and concentrated wastewater in the RO membrane assembly is discharged; after waste discharge is completed, the backflow pipeline is opened, the booster pump is started, pure water stored in the water storage tank flows back to flush the RO membrane assembly, and meanwhile the RO membrane assembly continues to prepare pure water to supplement the pure water to the water storage tank. According to the invention, the pure water prepared by the RO membrane is firstly stored, the concentrated wastewater is discharged, then the stored pure water flows back to wash the RO membrane, and the pure water is synchronously supplemented, so that the washing wastewater is reduced, and the cleaning efficiency of the RO membrane is improved.

Description

Technical Field

[0001] This application relates to the field of water system control technology, and in particular to a flushing control method for a water system, a water system, and a water purification device. Background Technology

[0002] Reverse osmosis (RO) membranes, due to their high-precision filtration capabilities, have become a core component of various water purification equipment, and their filtration performance directly determines the quality of the effluent. To prevent contaminants from accumulating on the surface of the RO membrane and clogging its micropores during operation, thus affecting filtration efficiency and lifespan, regular flushing of the RO membrane is a necessary step in the operation of water purification equipment.

[0003] Currently, RO membrane rinsing methods primarily employ either direct rinsing with raw water or intermittent wastewater rinsing during water purification. When using raw water, the contaminants already present in the raw water can affect the rinsing effect, making it difficult to thoroughly remove deposits on the membrane surface. Furthermore, achieving the desired cleaning effect requires a continuous consumption of large amounts of raw water, resulting in significant wastewater volume and low water resource utilization. Intermittent wastewater rinsing, on the other hand, cannot quickly and thoroughly remove the high-concentration wastewater remaining within the RO membrane module, and the residual contaminants can easily cause secondary contamination of the membrane, further leading to poor rinsing efficiency. In summary, existing RO membrane rinsing technologies suffer from large wastewater volumes and insufficient membrane cleaning efficiency, making it difficult to meet the demands of efficient and water-saving operation of water purification equipment. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a flushing control method for a water system, a water system, and a water purification device, which can reduce flushing wastewater, improve the cleaning efficiency of the RO membrane, and meet the requirements for efficient and water-saving operation of the water purification device.

[0005] Firstly, this application provides The water system includes an inlet pipe, a filter pipe, a wastewater pipe, a storage tank, and a return pipe. The filter pipe includes a booster pump and an RO membrane module. The return pipe connects the outlet of the storage tank to the inlet side of the RO membrane module. The method includes: The water system is controlled to inject the pure water produced by the RO membrane module into the water storage tank for storage until the water storage conditions are met. After the water storage is completed, the wastewater pipeline is opened and the booster pump is started to discharge the concentrated wastewater in the RO membrane module; After the waste discharge is completed, the return pipeline is opened and the booster pump is started, so that the pure water stored in the water storage tank is returned to rinse the RO membrane module. At the same time, the RO membrane module continues to produce pure water to replenish the water storage tank.

[0006] Furthermore, in some embodiments of this application, controlling the water system to inject the pure water filtered by the RO membrane module into the water storage tank for storage until the water storage completion conditions are met includes: Close the water outlet passage of the water storage tank and the return pipe; The inlet pipe is opened and a start command is sent to the booster pump to control the RO membrane module to produce pure water and inject it into the water storage tank; Monitor the water storage status of the water storage tank, and shut off the water inlet pipe when it is determined that the water storage completion condition has been met; wherein, the water storage completion condition is that the pressure in the water storage tank reaches a first preset pressure threshold, or the water level reaches a first preset water level threshold.

[0007] Furthermore, in some embodiments of this application, the step of opening the wastewater pipeline and starting the booster pump after the water storage is completed to discharge the concentrated wastewater from the RO membrane module includes: Close the inlet pipe and the outlet of the storage tank; The opening of the wastewater pipeline is adjusted to the maximum, and a start command is sent to the booster pump to perform high-flow drainage.

[0008] Furthermore, in some embodiments of this application, the step of opening the return pipeline and starting the booster pump after waste discharge is completed, so that the pure water stored in the water storage tank is returned to flush the RO membrane module, while the RO membrane module continues to produce pure water to replenish the water storage tank, includes: Keep the water inlet pipe closed; Open the reflux pipeline and send a start command to the booster pump so that the pure water in the water storage tank can be refluxed to flush the RO membrane module. At the same time, control the wastewater pipeline to keep a non-zero opening so that some of the wastewater generated during the flushing process can be discharged. During the reflux rinsing process, the RO membrane module is controlled to operate continuously, replenishing the newly produced pure water into the water storage tank.

[0009] Furthermore, in some embodiments of this application, the method further includes: Obtain at least one of the following parameters: the duration of the circulating flushing, the real-time water level of the water storage tank, or the conductivity value of the water in the return pipeline. The opening degree of the wastewater pipeline is dynamically adjusted according to the parameters.

[0010] Furthermore, in some embodiments of this application, the method further includes: Open the inlet water pipe and the user water intake passage, start the booster pump, and let the pure water produced by the RO membrane module flow directly to the pure water outlet.

[0011] Furthermore, in some embodiments of this application, the method further includes: When the execution time or circulation water volume of the circulating flushing is detected to reach a preset threshold, the booster pump is stopped and the return pipeline is closed, and the system enters standby mode.

[0012] Secondly, this application provides a water system that performs the flushing control method of the water system as described in the first aspect, including: A water inlet pipe is used to supply raw water, and a first control valve is installed on the water inlet pipe; A filtration pipeline for filtering raw water to produce pure water, the filtration pipeline including a booster pump and an RO membrane assembly connected in series; Wastewater pipeline for discharging concentrated wastewater, the wastewater pipeline is connected to the concentrate outlet of the RO membrane module, and the wastewater pipeline is equipped with a wastewater valve for adjusting the wastewater flow rate or switching it on and off; A water storage tank for storing pure water, wherein the inlet of the water storage tank is connected to the pure water outlet of the RO membrane module; The user water intake pipeline is used to supply pure water to users. The user water intake pipeline is connected to the outlet of the water storage tank. A second control valve for controlling the user's water intake is installed on the user water intake pipeline. A return pipeline is used to return pure water to rinse the RO membrane module. The return pipeline is connected between the outlet of the water storage tank and the inlet side of the RO membrane module. A circulation valve for controlling the return flow is provided on the return pipeline. The controller is configured to perform the various steps in the flushing control method of the water system.

[0013] Furthermore, in some embodiments of this application, a pressure switch is also included, which is disposed on the water storage tank and used to detect the internal pressure of the water storage tank, and the controller is signal-connected to the pressure switch.

[0014] Thirdly, this application provides a water purification device, characterized in that it includes a water system as described in the second aspect.

[0015] This application provides a flushing control method, water system, and water purification equipment for a water system. First, pure water produced by the RO membrane module is stored in a storage tank. This pure water has already removed contaminants from the raw water, avoiding the problem of new contaminants being carried by the flushing water source compared to existing raw water flushing methods. After water storage, concentrated wastewater from the RO membrane module is discharged first, quickly removing high-concentration contaminants remaining in the membrane and clearing obstacles for subsequent flushing. Then, the stored pure water is used to flush the RO membrane module. The high purity of the pure water allows for more precise removal of dirt deposited on the membrane surface, improving cleaning targeting. Simultaneously, the RO membrane module simultaneously produces pure water to replenish the storage tank, eliminating the need for a large amount of additional raw water as a flushing source. Therefore, this application can reduce the amount of wastewater generated during the flushing process and avoid the disconnect between flushing and water production, ultimately improving the cleaning efficiency of the RO membrane while reducing the amount of flushing wastewater. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] in: Figure 1 This is a schematic diagram of the structure of a first embodiment of the water system in one example; Figure 2 This is a schematic diagram of a second implementation of the water system in one embodiment; Figure 3 This is a structural schematic diagram of a third embodiment of the water system in one example; Figure 4 This is a structural schematic diagram of a fourth implementation of the water system in one embodiment; Figure 5 This is a structural schematic diagram of a fifth embodiment of the water system in one example; Figure 6 This is a structural schematic diagram of a sixth implementation of the water system in one embodiment; Figure 7 This is a flowchart illustrating a flushing control method for a water system in one embodiment. Detailed Implementation

[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of systems and methods consistent with those detailed in the appended claims or with some aspects of this application.

[0019] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover descriptions such as non-exclusive inclusion, so that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which must be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0020] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0021] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0022] To address the aforementioned technical problems and overcome the shortcomings of existing technologies, this application provides a flushing control method for a water system, a water system, and a water purification device. By first storing the pure water produced by the RO membrane, discharging the concentrated wastewater, and then using the stored pure water to flush the RO membrane while simultaneously replenishing pure water, the flushing wastewater is reduced and the cleaning efficiency of the RO membrane is improved.

[0023] The water system provided in this application embodiment may specifically include an inlet pipe, a filter pipe, a wastewater pipe, a storage tank, and a return pipe. The filter pipe includes a booster pump and an RO membrane module. The return pipe connects the outlet of the storage tank to the inlet side of the RO membrane module.

[0024] Specifically, the function of the inlet pipe is to provide the raw water to be treated for the entire system. Its outlet end is connected to the input end of the filter pipe, which is the only channel for raw water to enter the filtration stage. It can realize the directional transportation of raw water to the filter pipe, providing a water source for subsequent pure water production.

[0025] The filtration pipeline, as the core component of pure water production, contains a booster pump and an RO membrane module connected in series. The booster pump's input is connected to the outlet of the inlet pipeline, and its output is connected to the inlet side of the RO membrane module. Its main function is to provide sufficient pressure for the raw water flow and RO membrane filtration, ensuring stable filtration. The RO membrane module performs high-precision filtration on the pressurized raw water, removing salts, pollutants, and other impurities to ultimately produce pure water that meets the requirements. Its pure water outlet is connected to the inlet of the storage tank, and its concentrated water outlet is connected to the wastewater pipeline.

[0026] One end of the wastewater pipeline is connected to the concentrate outlet of the RO membrane module, and the other end is the wastewater discharge outlet. Its core function is to discharge the concentrated wastewater generated during the RO membrane module filtration process from the system, so as to avoid the accumulation of high-concentration pollutants in the membrane module.

[0027] The inlet of the water storage tank is connected to the pure water outlet of the RO membrane module. It is used to store the pure water produced by the RO membrane module and acts as a water buffer to ensure that there is a sufficient source of clean water for the subsequent rinsing process. Its outlet is connected to the inlet of the return pipeline, which can transport the stored pure water to the return pipeline.

[0028] The return pipeline connects the outlet of the water storage tank to the inlet side of the RO membrane module. It is the key channel for realizing pure water return rinsing. Its core function is to guide the pure water stored in the water storage tank to the inlet side of the RO membrane module, so that the pure water can backwash the surface of the RO membrane and clean the membrane module.

[0029] This application provides a water system that performs the flushing control method for the water system described above, specifically including: A water inlet pipe is used to supply raw water, and a first control valve is installed on the water inlet pipe; A filtration pipeline for filtering raw water to produce pure water, the filtration pipeline including a booster pump and an RO membrane assembly connected in series; Wastewater pipeline for discharging concentrated wastewater, the wastewater pipeline is connected to the concentrate outlet of the RO membrane module, and the wastewater pipeline is equipped with a wastewater valve for adjusting the wastewater flow rate or switching it on and off; A water storage tank for storing pure water, wherein the inlet of the water storage tank is connected to the pure water outlet of the RO membrane module; The user water intake pipeline is used to supply pure water to users. The user water intake pipeline is connected to the outlet of the water storage tank. A second control valve for controlling the user's water intake is installed on the user water intake pipeline. A return pipeline is used to return pure water to rinse the RO membrane module. The return pipeline is connected between the outlet of the water storage tank and the inlet side of the RO membrane module. A circulation valve for controlling the return flow is provided on the return pipeline. The controller is configured to perform the various steps in the flushing control method of the water system.

[0030] Specifically, the water system provided in this embodiment is used to achieve efficient rinsing of the RO membrane module and pure water production. The core consists of an inlet pipe, a filter pipe, a wastewater pipe, a water storage tank, a user water intake pipe, a return pipe, and a controller.

[0031] Among them, the inlet pipeline serves as the raw water input channel. A first control valve V1 is installed on the pipeline. One end of the valve is connected to the raw water source, and the other end is connected to the input end of the filter pipeline. Its core function is to control the on / off state of the first control valve V1 to realize the directional delivery of raw water to the filter pipeline, providing a water source for the pure water production and rinsing process.

[0032] For the filtration system: This is the core unit for pure water production. Internally, it consists of a pre-filter (Pre-CB), a booster pump, an RO membrane module, and a post-filter (Post-CB) connected in series along the water flow direction. The pre-filter (Pre-CB) connects the outlet of the inlet pipe to the input of the booster pump, performing preliminary filtration of the raw water to remove large particles and protect the booster pump and RO membrane module. The output of the booster pump connects to the inlet of the RO membrane module, providing stable pressure for the raw water flow and RO membrane filtration, ensuring the power required for filtration and rinsing. The RO membrane module performs high-precision filtration of the pressurized raw water, removing salts, pollutants, and other impurities. Its pure water outlet connects to the inlet of the storage tank, and its concentrated water outlet connects to the wastewater pipe. The post-filter (Post-CB) connects the outlet of the storage tank to the user's water intake pipe, performing final purification of the pure water and improving the quality of the output water.

[0033] For the wastewater pipeline, one end is connected to the concentrate outlet of the RO membrane module, and the other end is the wastewater discharge outlet. The pipeline is equipped with a wastewater valve V2 for adjusting the wastewater flow or switching it on and off. Its core function is to discharge the concentrated wastewater generated during the RO filtration process and the wastewater generated during the rinsing process of the RO membrane module out of the system, so as to avoid the accumulation of high-concentration pollutants in the membrane module.

[0034] As a pure water storage unit, the water inlet of the storage tank is directly connected to the pure water outlet of the RO membrane module. It is used to store the clean pure water produced by the RO membrane module and plays a role in water buffering, providing sufficient water source for subsequent reflux rinsing. The water outlet of the storage tank is divided into two paths: one path is connected to the return pipeline and the other path is connected to the user's water intake pipeline, realizing the diversion and utilization of pure water.

[0035] The user water intake pipeline is used to supply purified water to users. One end is connected to the outlet of the water storage tank (via the Post-CB filter), and the other end is the pure water outlet (faucet). A second control valve V3 is installed on the pipeline. The user's water intake can be started or stopped by controlling the opening and closing of the second control valve V3.

[0036] The return pipeline is a key channel for achieving pure water return flushing. One end is connected to the outlet of the water storage tank, and the other end is connected to the inlet side of the RO membrane module (between the pre-filter cartridge Pre-CB and the booster pump or between the booster pump and the RO membrane module). A circulation valve V4 is installed on the pipeline. By controlling the opening and closing of the circulation valve V4, the pure water in the water storage tank is returned to the RO membrane module.

[0037] As the core of the system, the controller establishes control connections with the first control valve V1, wastewater valve V2, second control valve V3, circulation valve V4, and booster pump respectively. It can receive pressure detection signals (such as pressure feedback from the high-pressure switch) and send control commands according to preset logic to realize the on / off of each pipeline, start / stop of the booster pump, and adjustment of the opening degree of the wastewater valve, and comprehensively control the entire process of pure water production, water storage, waste discharge, reflux flushing, and user water intake.

[0038] Optionally, the water system provided in this embodiment also includes a pressure switch, which is disposed on the water storage tank and used to detect the internal pressure of the water storage tank. The controller is signal-connected to the pressure switch.

[0039] Specifically, the pressure switch added to the water system provided in this embodiment is a key detection component to ensure precise control and stable operation of the system. The pressure switch is directly installed on the tank body of the water storage tank and connected to the internal cavity of the tank. It can sense the pressure changes inside the water storage tank in real time and convert the pressure signal into an electrical signal for output. The pressure switch establishes a bidirectional signal transmission relationship with the system controller. On the one hand, it can continuously feed back the real-time detected water tank pressure data to the controller. On the other hand, it can receive control commands from the controller, such as threshold setting and detection start / stop.

[0040] During the pure water storage stage, when the system starts water production and injects pure water into the storage tank, the pressure inside the tank gradually increases with the increase in water volume. The pressure switch collects pressure data in real time and transmits it synchronously to the controller. When the detected pressure value reaches the first pressure threshold preset by the controller (e.g., 0.35MPa~0.4MPa), the pressure switch sends a "water storage complete" trigger signal to the controller. After receiving the signal, the controller immediately sends a closing command to the first control valve V1 and stops the booster pump, terminating the water storage process. This prevents the storage tank from leaking or being damaged due to excessive pressure, while ensuring that the storage tank contains enough pure water to meet subsequent rinsing needs.

[0041] During standby, after the system enters standby mode, the pressure switch continues to monitor and provide real-time feedback on the pressure stability of the water storage tank. If a slight leak occurs in the water storage tank, causing a slow pressure drop, the pressure switch will send an "insufficient pressure" warning signal to the controller when the pressure falls below the preset minimum pressure holding threshold. The controller can then initiate a pressure replenishment program according to preset logic (such as briefly opening the first control valve V1 and the booster pump to produce water) or issue a prompt to the user to ensure that the water storage tank always maintains sufficient pure water storage and stable pressure.

[0042] In abnormal protection scenarios, when a system malfunction occurs (such as the first control valve V1 being stuck and unable to close), causing the pressure inside the water storage tank to rise continuously and exceed the preset safety pressure threshold, the pressure switch will trigger an emergency protection signal. Upon receiving the signal, the controller will immediately cut off the power to the booster pump and can control the wastewater valve V2 to partially open to release pressure, thus preventing the water storage tank from posing a safety hazard due to overpressure and improving the safety of system operation.

[0043] In addition, the detection accuracy of the pressure switch can be adjusted by the controller according to the system requirements. Its collaborative work with the controller allows the system to accurately judge and automatically control the water storage status through the correspondence between pressure and water volume without the need for additional complex water level detection devices. This simplifies the system structure, improves the control accuracy of water storage, flushing and other processes, and ensures the reliability and efficiency of the entire water system.

[0044] Optional, such as Figure 1As shown, in the first specific implementation of the water system provided in this embodiment, the inlet pipe is connected to the pre-filter cartridge Pre-CB via the first control valve V1. The output end of the pre-filter cartridge Pre-CB is connected to the booster pump Pump, and the output end of the booster pump Pump is connected to the inlet side of the RO membrane module. The pure water outlet of the RO membrane module is connected to the storage tank, and the concentrated water outlet is connected to the wastewater valve V2 (opening ratio 3:1). The outlet of the storage tank is divided into two paths: one path is connected to the inlet side of the RO membrane module (between the booster pump Pump and the RO membrane module) via the circulation valve V4, and the other path is connected to the second control valve V3 (faucet) via the post-filter cartridge Post-CB. The high-pressure switch is connected to the storage tank and is used to detect the pressure inside the storage tank. The controller is electrically connected to the first control valve V1, the wastewater valve V2, the second control valve V3, the circulation valve V4, the booster pump Pump, and the high-pressure switch, respectively.

[0045] Figure 1 This corresponds to the RO membrane backflow flushing stage of the water system. During operation, the controller closes the first control valve V1 (cutting off the raw water input) and the second control valve V3 (cutting off the user's water intake); the controller opens the circulation valve V4 (connecting the backflow pipeline) and sends a start command to the booster pump. The clean pure water stored in the storage tank flows into the RO membrane module's inlet side through the circulation valve V4 under the pressure of the booster pump, flushing back along the RO membrane surface to remove contaminants deposited on the membrane surface. At the same time, the RO membrane module continues to operate under the pressure of the booster pump, using the small amount of raw water remaining in the system or water not discharged during the flushing process for filtration. Newly produced pure water is replenished to the storage tank through the pure water outlet of the RO membrane module, maintaining a stable water volume in the storage tank. The wastewater valve V2 maintains a non-zero opening of 3:1. Wastewater containing contaminants generated during the flushing process flows into the wastewater valve V2 through the concentrated water outlet of the RO membrane module, partially discharging from the system to avoid secondary accumulation of contaminants.

[0046] Optional, such as Figure 2 As shown, in the second specific implementation of the water system provided in this embodiment, the first control valve V1, the pre-filter cartridge Pre-CB, the booster pump Pump, and the RO membrane module RO are connected in series; the RO pure water outlet of the RO membrane module is connected to the water storage tank, and the concentrated water outlet is connected to the wastewater valve V2 (opening ratio 3:1); the water outlet of the water storage tank is connected to the second control valve V3 via the post-filter cartridge Post-CB, and then connected to the RO inlet side of the RO membrane module via the circulation valve V4; the high-pressure switch is connected to the water storage tank, and the controller coordinates the control of all components.

[0047] Figure 2This corresponds to the normal water production stage of the water system provided in this embodiment. During specific operation, the controller controls the first control valve V1 to open (connecting the inlet water pipe) and the second control valve V3 to open (connecting the user's water intake pipe); the controller controls the circulation valve V4 to close (cutting off the return pipe) and sends a start command to the booster pump. Raw water flows into the pre-filter cartridge Pre-CB through the first control valve V1 for preliminary filtration, removing large particulate impurities. Under the pressure of the booster pump, it enters the RO membrane module RO. The RO membrane module performs high-precision filtration on the raw water, intercepting impurities such as salts and pollutants. The generated pure water is divided into two paths through the pure water outlet: one path flows into the storage tank for storage, and the other path is further purified by the post-filter cartridge Post-CB and then directly supplied to the user through the second control valve V3 (faucet). The concentrated wastewater generated by filtration flows into the wastewater valve V2 through the concentrated water outlet of the RO membrane module and is discharged from the system at an opening ratio of 3:1 to ensure the stable operation of the filtration process.

[0048] Optional, such as Figure 3 As shown, in the third specific implementation of the water system provided in this embodiment, the inlet pipe is connected to the pre-filter cartridge Pre-CB via the first control valve V1, the pre-filter cartridge Pre-CB is connected to the booster pump Pump, the booster pump Pump is connected to the RO membrane module RO; the RO pure water outlet of the RO membrane module is connected to the storage tank, and the concentrated water outlet is connected to the wastewater valve V2 (opening degree 100%); the outlet of the storage tank is connected to the RO inlet side of the RO membrane module via the circulation valve V4, and then connected to the second control valve V3 via the post-filter cartridge Post-CB; the high-pressure switch S1 is connected to the storage tank, and the controller controls the operating status of all components.

[0049] Figure 3 This corresponds to the concentrated wastewater flushing stage of the water system provided in this embodiment. During the specific operation, the controller controls the first control valve V1 to close (cutting off the raw water input), the second control valve V3 to close (cutting off the user's water intake passage), and the circulation valve V4 to close (cutting off the return pipeline). The controller adjusts the opening of the wastewater valve V2 to 100% (maximum opening) and sends a start command to the booster pump. After the booster pump starts, it generates stable pressure, which pushes the high-concentration concentrated wastewater (containing a large amount of unretained pollutants and salts) remaining inside the RO membrane module to flow rapidly to the concentrate outlet. The concentrated wastewater is discharged from the system at a large flow rate through the 100% open wastewater valve V2, which removes the pollutant residue in the membrane module in a short time, laying the foundation for subsequent return flushing. The high-pressure switch S1 monitors the pressure in the water storage tank in real time to ensure that the pure water in the water storage tank is in a stable storage state and does not participate in the waste discharge process.

[0050] Optional, such as Figure 4As shown, in the fourth specific implementation of the water system provided in this embodiment, the first control valve V1, the pre-filter cartridge Pre-CB, the booster pump Pump, and the RO membrane module RO are connected in series; the RO pure water outlet of the RO membrane module is connected to the water storage tank, and the concentrated water outlet is connected to the wastewater valve V2 (opening ratio 3:1); the water outlet of the water storage tank is connected to the RO inlet side of the RO membrane module via the circulation valve V4, and is connected to the second control valve V3 via the post-filter cartridge Post-CB; the high-pressure switch S1 is connected to the water storage tank, and the controller coordinates the control of all components.

[0051] Figure 4 This corresponds to the pure water storage stage of the water system provided in this embodiment. During specific operation, the controller controls the second control valve V3 to close (cutting off the user's water intake passage) and the circulation valve V4 to close (cutting off the return pipeline); the controller controls the first control valve V1 to open (connecting the water inlet pipeline) and sends a start command to the booster pump. Raw water enters the RO membrane module through the first control valve V1, the pre-filter cartridge Pre-CB, and the booster pump. After high-precision filtration, pure water is generated and flows into the storage tank through the pure water outlet of the RO membrane module. The wastewater valve V2 maintains a 3:1 opening, and the concentrated wastewater generated by filtration is continuously discharged from the system. The high-pressure switch S1 monitors the pressure in the storage tank in real time. When the pressure reaches a preset threshold (such as 0.4MPa), the controller determines that the water storage is complete, sends a command to close the first control valve V1 and the booster pump, and the water storage process ends. The pure water in the storage tank is used for subsequent return flushing.

[0052] Optional, such as Figure 5 As shown, in the fifth specific implementation of the water system provided in this embodiment, the first control valve V1, the pre-filter cartridge Pre-CB, the booster pump Pump, and the RO membrane module RO are connected in series; the RO pure water outlet of the RO membrane module is connected to the water storage tank, and the concentrated water outlet is connected to the wastewater valve V2 (opening ratio 3:1); the water outlet of the water storage tank is connected to the RO inlet side of the RO membrane module via the circulation valve V4, and then connected to the second control valve V3 via the post-filter cartridge Post-CB; the high-pressure switch S1 is connected to the water storage tank, and the controller controls all components.

[0053] Figure 5This corresponds to the standby phase of the water system provided in this embodiment. During specific operation, the controller controls all valves (first control valve V1, wastewater valve V2, second control valve V3, and circulation valve V4) to be in the closed state, cutting off all passages of the inlet pipe, wastewater pipe, user water intake pipe, and return pipe; the controller sends a stop command to the booster pump, the booster pump stops running, and there is no water flow in the entire system; the water storage tank stores a sufficient amount of clean pure water, and the high-pressure switch S1 continuously monitors the pressure in the water storage tank and feeds back the pressure signal to the controller in real time to ensure that the water storage tank is in a stable pressure-maintaining state; the system waits for a trigger signal (such as the user turning on the faucet or reaching the preset flushing cycle). Once a trigger signal is received, the controller will start the corresponding stage (such as user water intake or return flushing) according to the preset logic.

[0054] Optional, such as Figure 6 As shown, in the sixth specific implementation of the water system provided in this embodiment, the first control valve V1, the pre-filter cartridge Pre-CB, the booster pump Pump, and the RO membrane module RO are connected in series; the RO pure water outlet of the RO membrane module is connected to the water storage tank, and the concentrated water outlet is connected to the wastewater valve V2 (opening ratio 3:1); the water outlet of the water storage tank is connected to the RO inlet side of the RO membrane module via the circulation valve V4, and then connected to the second control valve V3 via the post-filter cartridge Post-CB; the high-pressure switch S1 is connected to the water storage tank, and the controller coordinates the operation of each component.

[0055] Figure 6 This corresponds to the user water intake stage of the water system provided in this embodiment. During specific operation, the user turns on the faucet, triggering the second control valve V3 to open (connecting the user's water intake pipeline). After the controller detects the opening signal of the second control valve V3, it controls the first control valve V1 to open (connecting the inlet pipeline) and the circulation valve V4 to close (cutting off the return pipeline), and sends a start command to the booster pump Pump. The raw water enters the RO membrane module RO through the first control valve V1, the pre-filter cartridge Pre-CB, and the booster pump Pump. The pure water generated by filtration is divided into two paths: one path is purified by the post-filter cartridge Post-CB and supplied to the user through the second control valve V3 (faucet), and the other path flows into the storage tank to replenish the water volume. The wastewater valve V2 maintains a 3:1 opening, and the concentrated wastewater generated by filtration is continuously discharged from the system. The high-pressure switch S1 monitors the pressure in the storage tank in real time to ensure that the water volume in the storage tank is maintained within a reasonable range, which not only meets the user's real-time water intake needs, but also reserves sufficient pure water for subsequent flushing.

[0056] Optionally, this embodiment also provides a water purification device, including the water system as described above.

[0057] Optionally, the flushing control method of this application can be implemented through a smart device, which is communicatively connected to the water system. The smart device is used to: control the water system to inject the pure water produced by the RO membrane module into the storage tank for storage until the storage conditions are met; after the storage is completed, open the wastewater pipeline and start the booster pump to discharge the concentrated wastewater in the RO membrane module; after the wastewater discharge is completed, open the return pipeline and start the booster pump to allow the pure water stored in the storage tank to flow back to flush the RO membrane module, while the RO membrane module continues to produce pure water to replenish the storage tank.

[0058] Smart devices include, but are not limited to: various personal computers, laptops, smartphones, tablets, portable wearable devices, smart gateways, and servers.

[0059] The present application will now be described in detail through specific embodiments.

[0060] Please see Figure 7 As shown, Figure 7 This is a flowchart illustrating a flushing control method for a water system provided in an embodiment of this application. The method is executed in a water system and includes: S1. Control the water system to inject the pure water produced by the RO membrane module into the water storage tank for storage until the water storage condition is met; Specifically, for step S1, firstly, the water system adjusts the on / off status of each pipeline to ensure that the outlet and return pipelines of the storage tank are closed, preventing pure water loss or diversion during storage; simultaneously, the inlet pipeline is kept unobstructed to provide conditions for raw water to enter the filtration pipeline. Then, the booster pump in the filtration pipeline is started, and the raw water enters the filtration pipeline through the inlet pipeline. Under the pressure of the booster pump, it flows through the RO membrane module, which performs high-precision filtration of the raw water, removing pollutants and salts. The generated pure water flows directionally into the storage tank through the pure water outlet of the RO membrane module. The water system continuously monitors the water storage status of the storage tank. When the pressure inside the storage tank rises to a preset first pressure threshold (e.g., 0.4 MPa), or the water level rises to a preset first water level threshold (e.g., 90% of the storage tank volume), the storage conditions are deemed met. At this point, the system controls the inlet pipeline to close, stopping the delivery of raw water to the filtration pipeline, and the storage process ends.

[0061] For example, if the preset pressure threshold of the water storage tank is 0.35MPa, when the RO membrane module continuously produces water and injects it into the water storage tank, and the pressure inside the tank gradually rises to 0.35MPa, the system automatically shuts off the water inlet pipe, and the water storage tank completes the storage of pure water. At this time, the pure water in the tank has met the subsequent flushing requirements.

[0062] S2. After the water storage is completed, open the wastewater pipeline and start the booster pump to discharge the concentrated wastewater in the RO membrane module; Specifically, for step S2, after water storage is completed, the system first keeps the inlet pipe and the outlet of the storage tank closed to prevent raw water from entering or pure water from being lost from the storage tank, ensuring the targeted nature of the wastewater discharge process. Subsequently, the system adjusts the wastewater pipe opening to its maximum and simultaneously starts the booster pump. Under the pressure of the booster pump, the high-concentration concentrated wastewater remaining in the RO membrane module (containing a large amount of unretained pollutants and salts) quickly flows into the wastewater pipe through the concentrate outlet and is discharged from the system through the wastewater discharge outlet. For example, after water storage is completed, the wastewater pipe is fully opened, the booster pump starts and maintains a stable pressure, and the concentrated wastewater remaining in the RO membrane module is discharged through the wastewater pipe at a large flow rate under pressure. Most of the concentrated wastewater in the membrane module can be discharged in just 30 seconds, preventing pollutant residue.

[0063] S3. After the waste discharge is completed, the return pipeline is opened and the booster pump is started to allow the pure water stored in the water storage tank to flow back to rinse the RO membrane module. At the same time, the RO membrane module continues to produce pure water to replenish the water storage tank. Specifically, for step S3, after waste discharge, the system keeps the inlet water pipe closed to prevent raw water from mixing with the flushing water source and affecting the cleaning effect. Then, the return pipe is opened, and the booster pump is started. The clean pure water stored in the storage tank flows through the return pipe to the inlet side of the RO membrane module under the action of the booster pump, thereby flushing the surface of the RO membrane and removing contaminants deposited on the membrane surface. Simultaneously, the RO membrane module continues to operate under the pressure of the booster pump, using any remaining raw water or residual water from the system for filtration. Newly produced pure water continuously replenishes the storage tank through the pure water outlet of the RO membrane module, maintaining a stable water level in the storage tank. For example, after the return pipe is opened, pure water in the storage tank continuously flows to the RO membrane module through the return pipe, flushing the membrane surface at an appropriate flow rate to thoroughly remove any remaining contaminants after waste discharge. At the same time, the RO membrane module simultaneously produces water, continuously replenishing the storage tank with newly generated pure water, ensuring that the storage tank does not run out of water during the flushing process, achieving synergistic flushing and water production.

[0064] This embodiment utilizes a process of first storing clean pure water, then thoroughly discharging concentrated wastewater, and finally using pure water for backflushing and simultaneous replenishment of pure water. This process avoids secondary pollution caused by raw water rinsing by using clean pure water, thus improving the cleaning effect of the RO membrane module. Furthermore, the orderly coordination of waste discharge and rinsing reduces the generation of ineffective wastewater, while the simultaneous water production to replenish the storage tank ensures the continuity of rinsing. Ultimately, this achieves a synergistic effect of reducing rinsing wastewater and improving the cleaning efficiency of the RO membrane.

[0065] Furthermore, in some embodiments, controlling the water system to inject the pure water filtered by the RO membrane module into the water storage tank for storage until the water storage conditions are met includes: Close the water outlet passage of the water storage tank and the return pipe; The inlet pipe is opened and a start command is sent to the booster pump to control the RO membrane module to produce pure water and inject it into the water storage tank; Monitor the water storage status of the water storage tank, and shut off the water inlet pipe when it is determined that the water storage completion condition has been met; wherein, the water storage completion condition is that the pressure in the water storage tank reaches a first preset pressure threshold, or the water level reaches a first preset water level threshold.

[0066] Specifically, to ensure that all the purified water produced by the RO membrane module flows directly into the storage tank and is stored without diversion or loss, the system first controls the closure of key pathways. Specifically, the outlet of the storage tank is completely closed by controlling a corresponding valve (such as the second control valve V3), cutting off the supply of purified water to the user's water intake. The return pipeline is completely closed by controlling its dedicated valve (such as the circulation valve V4), preventing purified water from prematurely entering the return channel. After the system starts the water storage program, the controller immediately sends a shutdown command. Upon receiving the command, the second control valve V3 and the circulation valve V4 quickly switch to the closed state, ensuring that both the outlet of the storage tank and the return pipeline are sealed, providing a leak-free channel for subsequent purified water storage.

[0067] After confirming that the water outlet and return lines of the storage tank are closed, the system opens the corresponding control valve of the inlet line (such as the first control valve V1) to allow raw water to smoothly enter the filtration line. Simultaneously, a start signal is sent to the booster pump, which starts operating upon receiving the command, providing stable pressure for the flow of raw water and RO membrane filtration. After entering through the inlet line, the raw water first passes through a pre-filter to remove large particles, and then flows through the RO membrane module under the pressure of the booster pump. The RO membrane module performs high-precision filtration of the raw water, trapping salts, pollutants, and other impurities. The resulting clean pure water is continuously injected into the storage tank through the pure water outlet of the RO membrane module. For example, after the first control valve V1 is opened, raw water enters the filtration line, the booster pump starts and maintains a stable pressure of 0.5 MPa, pushing the raw water through the RO membrane module. The filtered pure water is injected into the storage tank at a constant flow rate, and the water volume in the storage tank gradually increases.

[0068] The system monitors the water storage status of the storage tank in real time through preset detection components (such as pressure switches), simultaneously collecting pressure or water level data and comparing it with preset first pressure thresholds or first water level thresholds. If pressure monitoring is used, water storage is considered complete when the pressure in the storage tank rises to the first preset pressure threshold (e.g., 0.4 MPa); similarly, if water level monitoring is used, water storage is considered complete when the water level in the storage tank rises to the first preset water level threshold (e.g., 90% of the total tank volume). Once the water storage completion conditions are met, the system immediately sends a closing command to the control valve of the inlet pipeline (e.g., the first control valve V1) to cut off the raw water input, and simultaneously stops the booster pump, terminating the water storage process. For example, if the first preset pressure threshold is set to 0.38 MPa, during the water storage process, the pressure detection component continuously feeds back the pressure inside the water storage tank. When the pressure gradually increases from the initial 0.1 MPa to 0.38 MPa, the system determines that the water storage is complete, the first control valve V1 closes quickly, and the booster pump stops running. At this time, the amount of pure water in the water storage tank is sufficient for subsequent flushing needs.

[0069] This embodiment ensures that pure water can be stored in the storage tank efficiently and without loss by first closing the diversion path, then starting the water injection, and finally accurately monitoring the termination. At the same time, by clearly defining the conditions for completing the water storage, it not only ensures that the water storage is sufficient to meet subsequent usage needs, but also avoids abnormal system pressure caused by excessive water storage, thereby improving the stability and accuracy of the water storage process.

[0070] Furthermore, in some embodiments, the step of opening the wastewater pipeline and starting the booster pump after the water storage is completed to discharge the concentrated wastewater from the RO membrane module includes: Close the inlet pipe and the outlet of the storage tank; The opening of the wastewater pipeline is adjusted to the maximum, and a start command is sent to the booster pump to perform high-flow drainage.

[0071] Specifically, to ensure the targeted and efficient discharge of concentrated wastewater and to avoid interference from external water bodies or loss of internal pure water, the system first controls the closure of key pathways. Specifically, the inlet pipe is completely closed via its corresponding control valve (such as the first control valve V1), cutting off the input of raw water to the filter pipe and preventing raw water from mixing with the concentrated wastewater to be discharged. The outlet passage of the storage tank is completely closed via its dedicated control valve (such as the second control valve V3), preventing the outflow of the clean pure water stored in the storage tank and ensuring that the subsequent flushing water source is not affected. For example, after water storage is completed, the system immediately sends a closing command to the first control valve V1 and the second control valve V3. Both valves quickly switch to a sealed state, preventing raw water from flowing into the inlet pipe and preventing the pure water in the storage tank from being discharged. The entire wastewater discharge loop focuses solely on the concentrated wastewater within the RO membrane module.

[0072] After confirming that both the inlet pipe and the outlet pipe of the storage tank are closed, the system adjusts the opening of the corresponding control valve (such as wastewater valve V2) on the wastewater pipe to 100%, ensuring that the wastewater discharge channel is completely unobstructed and providing conditions for high-flow wastewater discharge. Simultaneously, a start signal is sent to the booster pump. Once started, the booster pump generates stable and sufficient pressure, propelling the high-concentration concentrated wastewater (containing a large amount of unretained salts, pollutants, and other impurities) remaining inside the RO membrane module to flow rapidly. Under the pressure of the booster pump, the concentrated wastewater flows out from the concentrate outlet of the RO membrane module and is discharged from the system at maximum flow rate through the fully opened wastewater pipe. This quickly removes the residual wastewater inside the membrane module, preventing pollutants from adhering to the membrane surface for extended periods. For example, after the wastewater valve V2 is adjusted to 100% opening, the booster pump starts and maintains a pressure of 0.6MPa. Under the pressure, the concentrated wastewater in the RO membrane module is discharged through the wastewater pipeline at a flow rate of 5 liters per second. It only takes 20 seconds to drain more than 95% of the concentrated wastewater in the membrane module, greatly reducing pollutant residue.

[0073] This embodiment maximizes the opening of the wastewater pipeline by closing irrelevant pathways and uses a booster pump to provide power, thereby achieving a large flow rate of concentrated wastewater discharged from the RO membrane module. This effectively removes high-concentration pollutants remaining in the membrane, laying a clean foundation for subsequent rinsing and avoiding secondary membrane contamination caused by incomplete wastewater discharge.

[0074] Furthermore, in some embodiments, after waste discharge is completed, the reflux pipeline is opened and the booster pump is started, causing the pure water stored in the water storage tank to flow back to flush the RO membrane module, while the RO membrane module continues to produce pure water to replenish the water storage tank, including: Keep the water inlet pipe closed; Open the reflux pipeline and send a start command to the booster pump so that the pure water in the water storage tank can be refluxed to flush the RO membrane module. At the same time, control the wastewater pipeline to keep a non-zero opening so that some of the wastewater generated during the flushing process can be discharged. During the reflux rinsing process, the RO membrane module is controlled to operate continuously, replenishing the newly produced pure water into the water storage tank.

[0075] Specifically, to ensure the purity of the rinsing water source and prevent contaminants in the raw water from affecting the cleaning effect during the rinsing process, after waste discharge, the system keeps the corresponding control valve (such as the first control valve V1) in the closed state, cutting off the input channel of raw water to the filter pipeline, so that the subsequent rinsing process relies only on the clean pure water stored in the storage tank. For example, after the waste discharge stage, the first control valve V1 remains closed and will not supply any raw water to the filter pipeline, ensuring that the water used for rinsing is all previously stored clean pure water filtered through the RO membrane, and avoiding secondary contamination of the RO membrane by impurities in the raw water.

[0076] The system first opens the control valve corresponding to the return pipeline (such as circulation valve V4) to open the return channel between the storage tank and the inlet side of the RO membrane module. Then, a start signal is sent to the booster pump. After starting, the booster pump generates stable pressure, pushing the clean pure water in the storage tank along the return pipeline to the inlet side of the RO membrane module. This allows for flushing of the RO membrane surface at an appropriate flow rate, removing attached contaminants. Simultaneously, the system controls the valve corresponding to the wastewater pipeline (such as wastewater valve V2) to maintain a non-zero opening (i.e., not completely closed). This opening can be preset according to the contaminant content (e.g., 20%-50%), ensuring that some of the wastewater carrying contaminants can be discharged through the wastewater pipeline in a timely manner during flushing, preventing the accumulation of contaminants within the system. For example, when the circulation valve V4 is fully opened, the booster pump starts and maintains a pressure of 0.4 MPa, and the pure water in the storage tank flows back to flush the RO membrane module at a flow rate of 3 liters per second; at the same time, the wastewater valve V2 is kept at 30% opening, and the wastewater containing pollutants generated during flushing is continuously discharged through this opening, which ensures the flushing effect and avoids excessive accumulation of wastewater.

[0077] While the reflux rinsing is underway, the system keeps the RO membrane module running, utilizing the small amount of water remaining in the system during rinsing (such as a small amount of clean water not completely drained from the RO membrane module) or some water in the return pipeline, under the pressure of the booster pump to continue the filtration process. The newly produced clean water from the RO membrane module continuously flows into the storage tank through its pure water outlet, replenishing the pure water lost during rinsing and maintaining a stable water level in the tank. This ensures that the reflux rinsing can continue without interruption. For example, during the reflux rinsing process, the RO membrane module operates continuously, producing 6 liters of pure water per minute. This pure water is replenished to the storage tank in real time, keeping the water level in the tank above 70% of its total volume, ensuring a continuous rinsing process of up to 5 minutes to thoroughly clean contaminants from the RO membrane surface.

[0078] This embodiment utilizes a synergistic operation of returning pure water to rinse some wastewater, timely discharge, and simultaneous water replenishment. This not only improves the cleaning effect of the RO membrane by using clean pure water, but also avoids the accumulation of pollutants in the cycle, while ensuring the continuity of the rinsing process, thus achieving a balance between high-efficiency cleaning and water conservation.

[0079] Furthermore, in some embodiments, the method further includes: Obtain at least one of the following parameters: the duration of the circulating flushing, the real-time water level of the water storage tank, or the conductivity value of the water in the return pipeline. The opening degree of the wastewater pipeline is dynamically adjusted according to the parameters.

[0080] Specifically, during the reflux rinsing process, key operating parameters are collected in real time through preset detection or timing modules. Single parameter collection or simultaneous collection of multiple parameters can be selected to ensure the accuracy of the adjustment basis.

[0081] If the system collects the duration of the cyclic flushing, its built-in timing unit starts timing from the moment the reflux flushing begins, continuously recording the cumulative flushing time with timing accuracy down to the second, and providing real-time feedback to the control core. For example, after the reflux flushing starts, the timing unit starts counting, and at the 10th second it reports "Duration 10s" and at the 30th second it reports "Duration 30s".

[0082] If the real-time water level of the storage tank is collected, the tank is equipped with a water level detection component (such as a liquid level sensor) to monitor the water level in real time and convert the water level data into an electrical signal that is transmitted to the control core, thus providing a clear indication of the remaining amount of pure water in the tank. For example, if the total volume of the storage tank is 10L and the liquid level sensor detects a current water level of 6L, it will send a message to the control core stating "real-time water level 6L".

[0083] If the conductivity of the water in the return pipeline is collected, a conductivity sensor is installed on the return pipeline to detect the conductivity of the pure water flowing through the pipeline in real time (the higher the conductivity, the more pollutants dissolved in the water), and transmit the detection data synchronously. For example, if the initial conductivity of the pure water in the return pipeline is 10 μS / cm, and the conductivity increases to 30 μS / cm during the rinsing process due to the carryover of pollutants, the sensor will immediately report this value.

[0084] After receiving the collected parameters, the control core compares them with preset parameter thresholds and dynamically adjusts the opening of the corresponding valves (such as wastewater valve V2) in the wastewater pipeline according to preset logic to achieve on-demand waste discharge. Based on the execution time adjustment, the preset opening of the wastewater valve is 40% during the initial flushing stage (0-20s) when the pollutant concentration is high; the opening is adjusted to 25% during the middle flushing stage (20-40s) when the pollutant decreases; and the opening is adjusted to 10% during the later flushing stage (after 40s) when the pollutant residue is low. Based on the real-time water level adjustment of the storage tank, the preset minimum safe water level is 3L. If the detected real-time water level is 5L (above the minimum water level), the opening can be maintained at 30%; if the water level drops to 4L, the opening is adjusted to 20%; and if the water level is close to 3L, the opening is adjusted to 5% to reduce the loss of pure water. Based on the conductivity adjustment of the return pipeline, the preset conductivity threshold is 25μS / cm. If the detected conductivity is 30μS / cm (above the threshold), it indicates that there are many pollutants, and the opening is adjusted to 40% to accelerate waste discharge; if the conductivity drops to 15μS / cm (below the threshold), it indicates that the cleaning effect meets the standard, and the opening is adjusted to 10%.

[0085] This embodiment collects key flushing parameters in real time and dynamically adjusts the opening of wastewater pipelines to precisely match the waste discharge volume with the flushing process, water storage status, and water quality. This ensures effective discharge of pollutants while avoiding water waste, further optimizing the rationality and economy of the flushing process.

[0086] Furthermore, in some embodiments, the method further includes: Open the inlet water pipe and the user water intake passage, start the booster pump, and let the pure water produced by the RO membrane module flow directly to the pure water outlet.

[0087] Specifically, upon receiving a user's water demand signal (such as a trigger command from the user turning on the faucet), the system first controls the corresponding control valve in the inlet pipe (such as the first control valve V1) to switch to the fully open state, opening the channel for raw water to enter the filter pipe and providing a water source for pure water production; at the same time, it ensures that other unrelated passages (such as the return pipe) are closed to avoid raw water diversion affecting water production efficiency.

[0088] While the inlet water pipe is opened, the system controls the corresponding control valve (such as the second control valve V3) of the user's water intake passage to be fully opened, opening up the delivery channel from the pure water outlet of the RO membrane module to the pure water outlet (faucet), ensuring that the newly produced pure water from the RO membrane module can flow directly to the user without the need for additional transfer and storage.

[0089] A start command is sent to the booster pump, which quickly establishes a stable working pressure to provide power for raw water filtration and pure water delivery. Under the pressure of the booster pump, the raw water enters the RO membrane module through the inlet pipe. The RO membrane module performs high-precision filtration on the raw water, intercepting impurities such as salts and pollutants. The generated clean pure water flows directly to the pure water outlet (faucet) for user use through the opened user water intake channel.

[0090] Furthermore, in some embodiments, the method further includes: When the execution time or circulation water volume of the circulating flushing is detected to reach a preset threshold, the booster pump is stopped and the return pipeline is closed, and the system enters standby mode.

[0091] Specifically, during the circulating flushing process, key operating indicators are monitored in real time through a built-in timing unit or flow detection component. The system can choose to monitor the cumulative execution time of the circulating flushing or the volume of circulating water flowing through the return pipe during the flushing process, ensuring precise control of the flushing progress. If monitoring execution time, the timing unit starts counting from the moment the circulating flushing begins, continuously recording the flushing time span, and the timing data is fed back to the control core in real time, with an accuracy down to the second level. If monitoring circulating water volume, a flow sensor installed on the return pipe detects the pure water flow rate through the pipe in real time, accumulates the total circulating water volume, and transmits the data to the control core.

[0092] The control core compares and analyzes the real-time collected execution time or circulating water volume with preset thresholds to determine whether the flushing has achieved the expected effect and whether it needs to be terminated. Based on the execution time determination, a preset maximum effective flushing time threshold (e.g., 180 seconds) is established. When the detected cumulative execution time reaches this threshold, it is determined that the flushing has been sufficient and no further action is needed. Based on the circulating water volume determination, a preset minimum effective flushing water volume threshold (e.g., 10L) is established. When the detected cumulative circulating water volume reaches this threshold, it is determined that the RO membrane module has been sufficiently cleaned.

[0093] When the control core determines that the detection parameters have reached the preset threshold, it immediately sends a stop command to the booster pump. Upon receiving the command, the booster pump cuts off the power output, stops running, and terminates the pressure supply to the water flow. At the same time, it sends a close command to the control valve (such as circulation valve V4) corresponding to the return pipeline. Circulation valve V4 quickly switches to the sealed state, cutting off the return channel between the water storage tank and the RO membrane module.

[0094] After the booster pump stops and the return pipeline is closed, the system switches to standby mode. At this time, all operating components (booster pump, circulation valve V4, etc.) are stopped, and the inlet water pipeline, wastewater pipeline, user water intake pipeline, etc. are kept closed. Only the control core and key detection components (such as pressure switches) maintain a low-power standby state, waiting for the next trigger signal (such as user water intake command, next flushing cycle trigger signal).

[0095] This embodiment achieves on-demand cessation of cyclic rinsing by accurately detecting rinsing parameters and triggering termination actions, avoiding resource waste and component wear caused by over-rinsing. At the same time, it enables the system to quickly enter a low-power standby state, ensuring the economy and stability of system operation, and waiting for the triggering of subsequent work instructions.

[0096] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0097] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0098] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A flushing control method for a water system, characterized in that, The water system includes an inlet pipe, a filter pipe, a wastewater pipe, a storage tank, and a return pipe. The filter pipe includes a booster pump and an RO membrane module. The return pipe connects the outlet of the storage tank to the inlet side of the RO membrane module. The method includes: The water system is controlled to inject the pure water produced by the RO membrane module into the water storage tank for storage until the water storage conditions are met. After the water storage is completed, the wastewater pipeline is opened and the booster pump is started to discharge the concentrated wastewater in the RO membrane module; After the waste discharge is completed, the return pipeline is opened and the booster pump is started, so that the pure water stored in the water storage tank is returned to rinse the RO membrane module. At the same time, the RO membrane module continues to produce pure water to replenish the water storage tank.

2. The flushing control method for a water system according to claim 1, characterized in that, The control system for injecting the purified water filtered by the RO membrane module into the storage tank for storage until the storage conditions are met includes: Close the water outlet passage of the water storage tank and the return pipe; The inlet pipe is opened and a start command is sent to the booster pump to control the RO membrane module to produce pure water and inject it into the water storage tank; Monitor the water storage status of the water storage tank, and shut off the water inlet pipe when it is determined that the water storage completion condition has been met; wherein, the water storage completion condition is that the pressure in the water storage tank reaches a first preset pressure threshold, or the water level reaches a first preset water level threshold.

3. The flushing control method for a water system according to claim 1, characterized in that, After the water storage is completed, the wastewater pipeline is opened and the booster pump is started to discharge the concentrated wastewater from the RO membrane module, including: Close the inlet pipe and the outlet of the storage tank; The opening of the wastewater pipeline is adjusted to the maximum, and a start command is sent to the booster pump to perform high-flow drainage.

4. The flushing control method for a water system according to claim 1, characterized in that, After waste discharge is completed, the return pipeline is opened and the booster pump is started, allowing the pure water stored in the water storage tank to flow back to flush the RO membrane module. Simultaneously, the RO membrane module continues to produce pure water to replenish the water storage tank, including: Keep the water inlet pipe closed; Open the reflux pipeline and send a start command to the booster pump so that the pure water in the water storage tank can be refluxed to flush the RO membrane module. At the same time, control the wastewater pipeline to keep a non-zero opening so that some of the wastewater generated during the flushing process can be discharged. During the reflux rinsing process, the RO membrane module is controlled to operate continuously, replenishing the newly produced pure water into the water storage tank.

5. The flushing control method for a water system according to claim 4, characterized in that, The method further includes: Obtain at least one of the following parameters: the duration of the circulating flushing, the real-time water level of the water storage tank, or the conductivity value of the water in the return pipeline. The opening degree of the wastewater pipeline is dynamically adjusted according to the parameters.

6. The flushing control method for a water system according to claim 1, characterized in that, The method further includes: Open the inlet water pipe and the user water intake passage, start the booster pump, and let the pure water produced by the RO membrane module flow directly to the pure water outlet.

7. The flushing control method for a water system according to claim 1, characterized in that, The method further includes: When the execution time or circulation water volume of the circulating flushing is detected to reach a preset threshold, the booster pump is stopped and the return pipeline is closed, and the system enters standby mode.

8. A waterway system, characterized in that, The flushing control method for a water system as described in any one of claims 1-7 includes: A water inlet pipe is used to supply raw water, and a first control valve is installed on the water inlet pipe; A filtration pipeline for filtering raw water to produce pure water, the filtration pipeline including a booster pump and an RO membrane assembly connected in series; Wastewater pipeline for discharging concentrated wastewater, the wastewater pipeline is connected to the concentrate outlet of the RO membrane module, and the wastewater pipeline is equipped with a wastewater valve for adjusting the wastewater flow rate or switching it on and off; A water storage tank for storing pure water, wherein the inlet of the water storage tank is connected to the pure water outlet of the RO membrane module; The user water intake pipeline is used to supply pure water to users. The user water intake pipeline is connected to the outlet of the water storage tank. A second control valve for controlling the user's water intake is installed on the user water intake pipeline. A return pipeline is used to return pure water to rinse the RO membrane module. The return pipeline is connected between the outlet of the water storage tank and the inlet side of the RO membrane module. A circulation valve for controlling the return flow is provided on the return pipeline. The controller is configured to perform the various steps in the flushing control method of the water system.

9. The water system according to claim 8, characterized in that, It also includes a pressure switch, which is installed on the water storage tank and used to detect the internal pressure of the water storage tank. The controller is signal-connected to the pressure switch.

10. A water purification device, characterized in that, Including the waterway system as described in any one of claims 8-9.

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