Intelligent water purification control method and water purification system

Abstract

The application discloses an intelligent water purification control method, which is applied to a water purification system. The water purification system comprises a raw water branch, a pressure boosting device, a water production branch, a waste water discharge branch, a pure water discharge branch and the pressure boosting device. When it is judged that the water production branch meets a flushing condition, the water purification system is controlled to perform a flushing operation, which comprises a first stage flushing, a second stage flushing and a third stage flushing. When it is judged that the water production branch meets a water production condition, the water purification system is controlled to perform a first stage water production and a second stage water production. It can be seen that the application can provide a multi-stage flushing and water production control mechanism, and simultaneously adopt a structure of double filtration components. Through the flushing operation between filtration unit groups and the explosive flushing process of a preposed device, the water purification system is effectively flushed and water production is performed, the intelligent control level of the water purification system is improved, the flushing efficiency of a filter core is improved, the water production rate of the water purification system is improved, the quality of the first cup of water is improved, and the waste of water resources is avoided.

Description

Technical Field

[0001] This invention relates to the field of water purification, and more particularly to an intelligent water purification control method and water purification system. Background Technology

[0002] With the rapid development of water purification technology, water purifiers that use devices such as reverse osmosis membranes for filtration are becoming increasingly popular. However, after prolonged use, concentrated wastewater remains inside the reverse osmosis membrane, causing salts or other dissolved solids to adhere to the membrane and reducing its lifespan. Therefore, it is necessary to flush the water purifier regularly.

[0003] In practical applications, filtered water or raw water is typically used to flush the wastewater side of the reverse osmosis pressure membrane, and the flushed water is then directly discharged. However, this flushing method results in the water purifier discharging a large amount of wastewater during the flushing process, reducing the water production efficiency of the water purifier and wasting water resources.

[0004] Therefore, it is particularly important to provide an intelligent water purification control method to improve flushing and water production efficiency. Summary of the Invention

[0005] This invention provides an intelligent water purification control method and system, which can provide a multi-stage flushing and water production control mechanism. It adopts a dual-filter component structure, and through the flushing operation between filter unit groups and the burst flushing process of the pre-filter, it achieves rapid flushing while saving water consumption during the flushing process. This allows for effective flushing and water production of the water purification system, significantly improving the intelligent control level of the water purification system, increasing the flushing efficiency of the filter element, increasing the water production rate of the water purification system, improving the quality of the first cup water, and avoiding water waste.

[0006] To address the aforementioned technical problems, the first aspect of this invention discloses an intelligent water purification control method. This method is applied to a water purification system, which includes a raw water branch, a booster device, a product water branch, a wastewater discharge branch, and a pure water discharge branch. The raw water branch is equipped with a booster device to generate a water pressure difference. The booster device is located upstream of the product water branch. The method is characterized by the addition of a pre-filter on the raw water branch. The product water branch includes a first filtration unit group and a second filtration unit group. The first filtration unit group includes a first filter... The method comprises: a filter inlet, a first filter element assembly, a first wastewater outlet, and a first pure water outlet; a second filtration unit assembly including a second filter inlet, a second filter element assembly, a second wastewater outlet, and a second pure water outlet; the first wastewater outlet being connected to the second filter inlet; both the first and second pure water outlets being connected to the pure water discharge branch; the first pure water outlet also being connected to a first pure water return branch; the second pure water outlet also being connected to a second pure water return branch; and the second wastewater outlet being connected to the wastewater discharge branch.

[0007] Determine whether the water production branch meets the flushing conditions;

[0008] When it is determined that the water production branch meets the flushing conditions, the water purification system is controlled to perform a flushing operation, which includes a first-stage flushing, and / or a second-stage flushing, and / or a third-stage flushing.

[0009] During the first stage of rinsing, the water purification system is controlled to perform a first rinsing operation. The first rinsing operation is used to return the pure water produced by the first filter unit group and the second filter unit group to the pre-filter through the first pure water return branch and the second pure water return branch, respectively, so as to push the water in the pre-filter to the pressurization device and then input it into the water production branch to rinse the first filter element assembly and the second filter element assembly.

[0010] During the second stage of rinsing, the water purification system is controlled to perform a second rinsing operation. The second rinsing operation is used to close the first pure water return branch and return the pure water generated by the second filter unit group to the pre-filter via the second pure water return branch, so as to push the water in the pre-filter to the pressurization device and then input it into the water production branch to rinse the first filter element assembly and the second filter element assembly.

[0011] During the third stage of rinsing, the water purification system is controlled to perform a third rinsing operation. The third rinsing operation is used to open the wastewater discharge branch and push the water in the pre-filter to the booster device in a high flow rate and then input it into the production water branch to flush the first filter element assembly and the second filter element assembly.

[0012] Determine whether the water production branch meets the water production conditions;

[0013] When it is determined that the water production branch meets the water production conditions, the water purification system is controlled to perform the first stage of water production and the second stage of water production.

[0014] During the first stage of water production, the water purification system is controlled to perform a first water production operation. The first water production operation is used to control the pure water produced by the second filtration unit group to be returned through the second pure water return branch and mixed with the raw water before being input into the pre-filter and then into the first filtration unit group through the pressurization device, so that the pure water produced by the first filtration unit group is discharged through the pure water discharge branch.

[0015] During the second stage of water production, the water purification system is controlled to perform a second water production operation, which discharges the pure water produced by the first filtration unit group and the second filtration unit group through the pure water discharge branch respectively.

[0016] As an optional implementation, in the first aspect of the present invention, the second wastewater outlet is further connected to a wastewater return branch.

[0017] During the first stage of rinsing, the method further includes:

[0018] The wastewater return branch is controlled to perform a first wastewater return operation, which is used to return the wastewater discharged from the second wastewater outlet to the booster device and then input it into the product water branch to maintain the water quality balance between the first filter element assembly and the second filter element assembly; and to close the wastewater discharge branch.

[0019] As an optional implementation, in the first aspect of the present invention, during the water production in the first stage, the method further includes:

[0020] The wastewater return branch is controlled to perform a second wastewater return operation. The second wastewater return operation is used to control the wastewater return branch to return the wastewater discharged from the second wastewater outlet to the booster device and then input it into the first filter unit group, so that the pure water produced by the first filter unit group is discharged through the pure water discharge branch.

[0021] As an optional implementation, in the first aspect of the present invention, the method further includes:

[0022] During the first stage of water production, it is determined whether the first stage of water production is completed. If it is determined that the first stage of water production is completed, the second stage of water production is started.

[0023] The determination of whether the water production in the first stage is completed includes:

[0024] Determine whether the duration of water production in the first stage exceeds a first preset duration. If it is determined that the duration of water production in the first stage exceeds the first preset duration, then it is determined that the water production in the first stage has been completed; or,

[0025] Determine whether the first water quality value at the second wastewater outlet exceeds the first water quality threshold. If it is determined that the first water quality value at the second wastewater outlet exceeds the first water quality threshold, then it is determined that the first stage of water production has been completed.

[0026] As an optional implementation, in the first aspect of the present invention, the method further includes:

[0027] When the first stage of water production or the second stage of water production is performed, if it is determined that the first water quality value at the outlet of the second wastewater exceeds the second water quality threshold, or if it is determined that the second water quality value at the inlet of the first filter element exceeds the third water quality threshold, the wastewater return branch is controlled to perform a shutdown operation.

[0028] As an optional implementation, in the first aspect of the present invention, determining whether the water production branch meets the flushing conditions includes:

[0029] Determine whether the third water quality value at the first wastewater outlet exceeds the fourth water quality threshold. If it is determined that the first water quality value exceeds the fourth water quality threshold, then it is determined that the product water branch meets the flushing conditions; or,

[0030] Determine whether the first water quality value at the second wastewater outlet exceeds the fifth water quality threshold. If it is determined that the first water quality value exceeds the fifth water quality threshold, then it is determined that the product water branch meets the flushing conditions; or,

[0031] Determine whether the fourth water quality value at the first pure water outlet exceeds the sixth water quality threshold. If it is determined that the fourth water quality value exceeds the sixth water quality threshold, then it is determined that the water production branch meets the flushing conditions; or,

[0032] Determine whether the fifth water quality value at the second pure water outlet exceeds the seventh water quality threshold. If the fifth water quality value exceeds the seventh water quality threshold, then determine that the water production branch meets the flushing conditions; or,

[0033] Determine whether the sixth water quality value of the pure water discharge branch exceeds the eighth water quality threshold. If it is determined that the sixth water quality value exceeds the eighth water quality threshold, then it is determined that the water production branch meets the flushing conditions; or,

[0034] Determine whether the time difference between the current time point and the time point when the most recent flushing of the water production branch ends exceeds a second preset time. If the time difference between the current time point and the time point when the most recent flushing of the water production branch ends exceeds the second preset time, then determine that the water production branch meets the flushing conditions; or,

[0035] Determine whether the operating time of the water production branch exceeds a third preset time. If it is determined that the operating time of the water production branch exceeds the third preset time, then it is determined that the water production branch meets the flushing conditions. The operating time includes the operating time of a single water production cycle or the total operating time of the most recent N water production cycles; or...

[0036] Determine whether the water production capacity of the water production branch exceeds a preset water volume. If it is determined that the water production capacity of the water production branch exceeds the preset water volume, then it is determined that the water production branch meets the flushing conditions. The water production capacity includes the water volume produced in a single cycle or the sum of the water volumes produced in the most recent N cycles; or...

[0037] Determine whether the number of water production cycles of the water production branch exceeds the preset number of water production cycles. If it is determined that the number of water production cycles of the water production branch exceeds the preset number of water production cycles, then it is determined that the water production branch meets the flushing conditions. The number of water production cycles includes the sum of the number of water production cycles between the current time point and the time point when the most recent flushing of the water production branch ends, or the total number of water production cycles within the water production life cycle of the water production branch.

[0038] A second aspect of this invention discloses an intelligent water purification system, comprising a raw water branch, a product water branch, a wastewater discharge branch, and a pure water discharge branch. A pressure boosting device is provided on the raw water branch to generate a water pressure difference. The pressure boosting device is located upstream of the product water branch. The water purification system further comprises:

[0039] The water production branch includes a first filtration unit group and a second filtration unit group. The first filtration unit group includes a first filter element inlet, a first filter element assembly, a first wastewater outlet, and a first pure water outlet. The second filtration unit group includes a second filter element inlet, a second filter element assembly, a second wastewater outlet, and a second pure water outlet. The first wastewater outlet is connected to the second filter element inlet, and both the first pure water outlet and the second pure water outlet are connected to the pure water discharge branch.

[0040] The first pure water return branch intersects with the pure water discharge branch at a first pure water return intersection point, and the first pure water return branch intersects with the raw water branch at a second pure water return intersection point; the second pure water return branch has one end connected to the second pure water outlet, and the other end intersects with the first pure water return branch at a third pure water return intersection point, the third pure water return intersection point being located between the first pure water return intersection point and the second pure water return intersection point;

[0041] A pre-filter is also provided on the raw water branch line. The pre-filter is used to buffer the raw water in the raw water branch line and / or the pure water returned from the first pure water return branch line and / or the pure water returned from the second pure water return branch line. The pre-filter is located downstream of the intersection of the second pure water return branch line and upstream of the booster device.

[0042] The water purification system is used to perform a flushing operation when it is determined that the water production branch meets the flushing conditions. The flushing operation includes a first-stage flushing, and / or a second-stage flushing, and / or a third-stage flushing.

[0043] During the first stage of rinsing, the first pure water return branch and the second pure water return branch are used to return the pure water generated by the first filter unit group and the second filter unit group to the pre-filter device, so as to push the water in the pre-filter device to the pressurization device and then input it into the water production branch to rinse the first filter element assembly and the second filter element assembly.

[0044] During the second stage of rinsing, the first pure water return branch is closed, and the second pure water return branch is used to return the pure water generated by the second filter unit group to the pre-filter, so as to push the water in the pre-filter to the pressurization device and then input it into the water production branch to rinse the first filter element assembly and the second filter element assembly.

[0045] During the third stage of rinsing, the wastewater discharge branch is opened, and the pre-filter is used to push the water it has buffered out in a large flow rate to the booster device and then input it into the production water branch to flush the first filter element assembly and the second filter element assembly.

[0046] The water production branch is used to perform the first stage of water production and the second stage of water production when it is determined that the water production branch meets the water production conditions.

[0047] In the first stage of water production, the second pure water return branch is used to return the pure water produced by the second filtration unit group and mix it with the raw water before inputting it into the pre-filter and then into the first filtration unit group through the pressurization device, so that the pure water produced by the first filtration unit group can be discharged through the pure water discharge branch.

[0048] In the second stage of water production, the water production branch is used to discharge the pure water produced by the first filtration unit group and the second filtration unit group through the pure water discharge branch.

[0049] As an optional implementation, in a second aspect of the invention, the water purification system further includes:

[0050] The wastewater return branch intersects with the wastewater discharge branch at a first wastewater return intersection point, and the wastewater return branch intersects with the raw water branch at a second wastewater return intersection point; the second wastewater return intersection point is located upstream of the booster device;

[0051] During the first stage of rinsing, the wastewater return branch is used to return the wastewater discharged from the second wastewater outlet to the booster device and then input it into the product water branch to maintain the water quality balance between the first filter element assembly and the second filter element assembly; the wastewater discharge branch is closed.

[0052] As an optional implementation, in a second aspect of the present invention, a first pure water reflux valve assembly and a second pure water reflux valve assembly are provided on the first pure water reflux branch. The first pure water reflux valve assembly is located between the first pure water reflux intersection point and the third pure water reflux intersection point, and the second pure water reflux valve assembly is located between the second pure water reflux intersection point and the third pure water reflux intersection point; a wastewater reflux valve assembly is provided on the wastewater reflux branch; a pure water valve assembly is provided on the pure water discharge branch; and a wastewater valve assembly is provided on the wastewater discharge branch.

[0053] As an optional implementation, in a second aspect of the invention, the water purification system further includes:

[0054] A water quality testing device is installed on the branch line connected to the second wastewater outlet. The water quality testing device is used to monitor the real-time water quality value of the second wastewater outlet.

[0055] The water quality testing device includes:

[0056] A first water quality detection device is installed at the second wastewater outlet; or / and,

[0057] A second water quality detection device is installed on the wastewater return branch; or / and,

[0058] The third water quality testing device is installed on the wastewater discharge branch.

[0059] As an optional implementation, in a second aspect of the present invention, when the wastewater return branch and the wastewater discharge branch share a portion of the branch, a wastewater proportioning device is provided on the branch shared by the wastewater return branch and the wastewater discharge branch. The wastewater proportioning device is used to adjust the proportion of wastewater discharged from the wastewater outlet flowing into the wastewater return branch and the wastewater discharge branch respectively.

[0060] As an optional implementation, in a second aspect of the present invention, a fourth water quality detection device is provided at the first wastewater outlet, the fourth water quality detection device being used to detect the water quality at the first wastewater outlet.

[0061] As an optional implementation, in a second aspect of the present invention, a fifth water quality detection device is provided on the first pure water return branch. The fifth water quality detection device is located between the first pure water outlet and the intersection of the first pure water return branch, and the fifth water quality detection device is used to detect the water quality of the first pure water outlet.

[0062] As an optional implementation, in a second aspect of the present invention, a sixth water quality detection device is provided on the second pure water return branch. The sixth water quality detection device is located between the intersection of the second pure water outlet and the third pure water return point, and is used to detect the water quality of the second pure water outlet.

[0063] As an optional implementation, in a second aspect of the present invention, a seventh water quality detection device is provided on the raw water branch line. The seventh water quality detection device is located between the intersection of the second pure water reflux and the inlet of the first filter element. The seventh water quality detection device is used to detect the water quality at the inlet of the first filter element.

[0064] A third aspect of the present invention discloses another intelligent water purification control device, the device comprising:

[0065] Memory containing executable program code;

[0066] A processor coupled to the memory;

[0067] The processor calls the executable program code stored in the memory to execute some or all of the steps in any of the intelligent water purification control methods disclosed in the first aspect of the present invention.

[0068] The fourth aspect of the present invention discloses a computer storage medium storing computer instructions, which, when invoked, are used to execute some or all of the steps in any of the intelligent water purification control methods disclosed in the first aspect of the present invention.

[0069] Compared with the prior art, the present invention has the following beneficial effects:

[0070] This invention discloses an intelligent water purification control method applied to a water purification system. The system includes a raw water branch, a booster device, a product water branch, a wastewater discharge branch, a pure water discharge branch, and the booster device again. When the product water branch is determined to meet flushing conditions, the system is controlled to perform a flushing operation, which includes a first-stage flushing, a second-stage flushing, and a third-stage flushing. When the product water branch is determined to meet water production conditions, the system is controlled to perform a first-stage water production and a second-stage water production. Therefore, this invention provides a multi-stage flushing and water production control mechanism. Simultaneously, by employing a dual-filtration component structure, the system effectively flushes and produces water through flushing operations between filter units and a pre-filter flushing process, significantly improving the intelligent control level of the water purification system, increasing filter flushing efficiency, improving the water production rate of the system, enhancing the quality of the first cup of water, and avoiding water waste. Attached Figure Description

[0071] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0072] Figure 1 This is a schematic flowchart of an intelligent water purification control method disclosed in an embodiment of the present invention;

[0073] Figure 2 This is a flowchart illustrating another intelligent water purification control method disclosed in an embodiment of the present invention;

[0074] Figure 3 This is a schematic diagram of the structure of an intelligent water purification system disclosed in an embodiment of the present invention;

[0075] Figure 4 This is a schematic diagram of another intelligent water purification system disclosed in an embodiment of the present invention;

[0076] Figure 5 This is a schematic diagram of the structure of an intelligent water purification control device disclosed in an embodiment of the present invention.

[0077] The labels in the diagram represent the following meanings: First filtration unit group 1; Second filtration unit group 2; Booster device 3; First water quality testing device 4; Pre-filter 5; Wastewater return valve assembly 6; First pure water return valve assembly 7; Second pure water return valve assembly 8; Pure water valve assembly 9; Wastewater proportioning device 10; Second water quality testing device 11; Third water quality testing device 12; Fourth water quality testing device 13; Sixth water quality testing device 14; Seventh water quality testing device 15; Fifth water quality testing device 16; Wastewater valve assembly 17; First pure water return intersection A; Second pure water return intersection B; Third pure water return intersection C; First wastewater return intersection D; Second wastewater return intersection E. Detailed Implementation

[0078] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0079] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or end that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or ends.

[0080] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0081] This invention discloses an intelligent water purification control method and device. This method and device provide a multi-stage flushing and water production control mechanism, employing a dual-filtration component structure. Through flushing operations between filter units and a pre-filter flushing process, rapid flushing is achieved while conserving water during the flushing process. This effectively flushes and produces water for the water purification system, significantly improving the intelligent control level of the system, increasing filter flushing efficiency, enhancing water production, improving the quality of the first cup of water, and avoiding water waste. Detailed descriptions follow.

[0082] Example 1

[0083] Please see Figure 1 , Figure 1 This is a schematic flowchart of an intelligent water purification control method disclosed in an embodiment of the present invention. Figure 1 As shown, the intelligent water purification control method may include the following operations:

[0084] 101. Determine whether the water production branch meets the flushing conditions.

[0085] In this embodiment of the invention, the water purification system includes a raw water branch, a booster device, a product water branch, a wastewater discharge branch, and a pure water discharge branch. The booster device, located upstream of the product water branch, generates a water pressure difference. The product water branch includes a first filtration unit group and a second filtration unit group. The first filtration unit group includes a first filter inlet, a first filter assembly, a first wastewater outlet, and a first pure water outlet. The second filtration unit group includes a second filter inlet, a second filter assembly, a second wastewater outlet, and a second pure water outlet. The first wastewater outlet is connected to the second filter inlet. Both the first and second pure water outlets are connected to the pure water discharge branch. The first pure water outlet is also connected to a first pure water return branch, and the second pure water outlet is also connected to a second pure water return branch. The second wastewater outlet is connected to the wastewater discharge branch. A pre-filter is also provided on the raw water branch, located upstream of the booster device. The second wastewater outlet is also connected to the wastewater return branch. Raw water flows through a pre-filter and is pressurized by a booster device before entering the first filtration unit group. The first filtration unit group filters the water into pure water and wastewater. The pure water can either flow back to the upstream of the pre-filter via the first pure water return branch and then enter the product water branch via the booster device, or it can be discharged through the pure water discharge branch. Wastewater can enter the second filtration unit group, where it is further filtered into pure water and wastewater. The pure water can either flow back to the upstream of the pre-filter via the second pure water return branch and then enter the product water line via the booster device, or it can be discharged through the pure water discharge branch. Wastewater can be directly discharged through the wastewater discharge branch. This invention requires determining whether the product water branch meets the flushing conditions, i.e., whether the filter element meets the flushing conditions. The flushing operation is only initiated when the flushing conditions are met. For example, after a user accumulates a certain volume of water, the flushing operation is initiated when the TDS at the wastewater outlet changes to a certain value. In this embodiment, the pre-filter is used to buffer the water input from the raw water branch and / or the pure water return branch. The pre-filter may include a single-chamber water storage device, a multi-chamber water storage device, an airbag water storage device, a filtration device, etc., and the embodiments of the present invention are not limited thereto. Furthermore, it should be noted that the present invention does not limit the capacity of the pre-filter; preferably, the capacity of the pre-filter is not fixed but adjustable.

[0086] 102. When it is determined that the water production branch meets the flushing conditions, the water purification system is controlled to perform a flushing operation, which includes a first-stage flushing, and / or a second-stage flushing, and / or a third-stage flushing.

[0087] In this embodiment of the invention, when it is determined that the water production branch meets the flushing conditions, it indicates that the first filter element assembly and / or the second filter element assembly need to be flushed. In this embodiment, the flushing of the filter elements is divided into three stages: a first-stage flushing, and / or a second-stage flushing, and / or a third-stage flushing. The flushing sequence of the three stages is not limited in this embodiment.

[0088] 103. During the first stage of rinsing, control the water purification system to perform the first rinsing operation.

[0089] In this embodiment of the invention, the first rinsing operation is used to return the pure water produced by the first and second filter unit groups to the pre-filter via the first and second pure water return branches, respectively. This pushes the water in the pre-filter to the pressurization device and then into the product water branch to rinse the first and second filter element assemblies. Through the first rinsing operation, the pure water produced by the first and second filter unit groups is returned, diluting the raw water in the pre-filter to a low concentration. At this time, the wastewater discharge branch can discharge at a low flow rate or be closed (it can also be closed first, then discharged at a low flow rate; or discharged at a certain flow rate first, and then the discharge flow rate gradually reduced to closure; this embodiment of the invention does not limit this). It should be noted that the wastewater discharge volume is equal to the inflow volume through the raw water branch; the lower the wastewater discharge volume, the lower the concentration of the diluted water in the pre-filter.

[0090] 104. During the second stage of rinsing, control the water purification system to perform the second rinsing operation.

[0091] In this embodiment of the invention, the second flushing operation is used to shut off the first pure water return branch and return the pure water generated by the second filtration unit group to the pre-filter via the second pure water return branch, so as to push the water in the pre-filter to the booster device and then input it into the product water branch to flush the first filter element assembly and the second filter element assembly. Through the second flushing operation, only the pure water generated by the second filtration unit group is used to further dilute the water in the pre-filter, further reducing the salt content in the flushed filter element.

[0092] 105. During the third stage of rinsing, control the water purification system to perform the third rinsing operation.

[0093] In this embodiment of the invention, the third flushing operation is used to open the wastewater discharge branch and push the water in the pre-filter to the booster device and then into the product water branch to flush the first and second filter elements. At this time, the wastewater discharge branch is opened at a high flow rate, rapidly flushing the low-concentration water in the pre-filter into the wastewater filtration side of the first and / or second filter elements, flushing and replacing the high-concentration wastewater on the wastewater filtration side. Because the wastewater discharge branch is open at a large degree at this time, the influent to the first and / or second filter elements is hardly concentrated, and the wastewater concentration on the wastewater filtration side of the entire filter assembly is almost equal to the concentration on the influent side of the filter assembly, resulting in an extremely low average water concentration (equilibrium concentration) for the entire filter assembly.

[0094] It should be noted that the entire rinsing operation may include any one, two, or three of the following: the first stage rinsing, the second stage rinsing, and the third stage rinsing. This embodiment of the invention does not limit the scope of the rinsing operation.

[0095] 106. Determine whether the water production branch meets the water production conditions.

[0096] 107. When it is determined that the water production branch meets the water production conditions, control the water purification system to perform the first stage of water production and the second stage of water production.

[0097] 108. During the first stage of water production, control the water purification system to perform the first water production operation.

[0098] In this embodiment of the invention, the first water production operation controls the pure water produced by the second filtration unit group to be returned via the second pure water return branch, mixed with raw water, and then input into the pre-filter device. After passing through the booster device, the pure water is then input into the first filtration unit group, and the pure water produced by the first filtration unit group is discharged through the pure water discharge branch. During the first water production operation, the wastewater discharge branch can be opened or closed for a period of time before opening; this embodiment of the invention does not impose any limitations. This reduces the amount of wastewater discharged and saves water. At this time, only the pure water produced by the second filtration unit group is returned, mixed with raw water, input into the pre-filter device, and then pressurized before entering the first filtration unit group, where the pure water produced by the first filtration unit group is used.

[0099] 109. During the second stage of water production, control the water purification system to perform the second water production operation.

[0100] In this embodiment of the invention, the second water production operation is used to discharge the pure water produced by the first filtration unit group and the second filtration unit group through the pure water discharge branch, respectively.

[0101] As can be seen, the method described in the embodiments of the present invention can provide a multi-stage rinsing and water production control mechanism. At the same time, it adopts a dual-filtration component structure, and through the rinsing operation between the filter unit groups and the burst flushing process of the pre-filter, it achieves the purpose of rapid rinsing while saving water consumption in the rinsing process. This allows for effective rinsing and water production of the water purification system, significantly improving the intelligent control level of the water purification system, increasing the rinsing efficiency of the filter element, increasing the water production rate of the water purification system, improving the quality of the first cup water, and avoiding waste of water resources.

[0102] In an optional embodiment, the method may further include the following operations:

[0103] During the first stage of water production, it is determined whether the first stage of water production is completed. If it is determined that the first stage of water production is completed, the second stage of water production is started.

[0104] The determination of whether the first stage of water production is complete includes:

[0105] Determine whether the duration of the first stage of water production exceeds a first preset duration. If it is determined that the duration of the first stage of water production exceeds the first preset duration, then the first stage of water production is considered complete; or...

[0106] Determine whether the first water quality value at the second wastewater outlet exceeds the first water quality threshold. If it is determined that the first water quality value at the second wastewater outlet exceeds the first water quality threshold, then the first stage of water treatment is considered complete.

[0107] In this embodiment of the invention, the boundary point between the first stage and the second stage of water production can be controlled according to a preset control mode. The preset control mode can be a time-based mode, a water quality module, or a combination of both; this embodiment of the invention does not impose any limitations.

[0108] As can be seen, the method described in the embodiments of the present invention can provide a multi-stage flushing and water production control mechanism, while adopting a dual-filtration component structure. Through the flushing operation between the filter unit groups and the burst flushing process of the pre-filter, it can achieve the purpose of rapid flushing while saving water consumption in the flushing process. At the same time, it provides a flexible control mode, realizes precise segmentation of the water production stage, and is conducive to achieving a fine-grained control level of the water production process, further improving the water production rate of the filtration system.

[0109] In another optional embodiment, determining whether the water production branch meets the flushing conditions may include the following operations:

[0110] Determine whether the third water quality value at the first wastewater outlet exceeds the fourth water quality threshold. If the first water quality value exceeds the fourth water quality threshold, then the product water branch is determined to meet the flushing conditions; or...

[0111] Determine whether the first water quality value at the second wastewater outlet exceeds the fifth water quality threshold. If the first water quality value exceeds the fifth water quality threshold, then the product water branch is determined to meet the flushing conditions; or...

[0112] Determine whether the fourth water quality value at the first pure water outlet exceeds the sixth water quality threshold. If the fourth water quality value exceeds the sixth water quality threshold, then the product water branch is determined to meet the flushing conditions; or...

[0113] Determine whether the fifth water quality value at the second pure water outlet exceeds the seventh water quality threshold. If the fifth water quality value exceeds the seventh water quality threshold, then the product water branch is determined to meet the flushing conditions; or...

[0114] Determine whether the sixth water quality value of the pure water discharge branch exceeds the eighth water quality threshold. If the sixth water quality value exceeds the eighth water quality threshold, then the product water branch is determined to meet the flushing conditions; or,

[0115] Determine whether the time difference between the current time point and the time point when the most recent flushing of the product water branch ends exceeds a second preset time. If the time difference between the current time point and the time point when the most recent flushing of the product water branch ends exceeds the second preset time, then the product water branch is determined to meet the flushing conditions; or,

[0116] Determine whether the operating time of the water production branch exceeds the third preset time. If it is determined that the operating time of the water production branch exceeds the third preset time, then the water production branch is determined to meet the flushing conditions. The operating time includes the operating time of a single water production cycle or the total operating time of the most recent N water production cycles; or...

[0117] Determine whether the water production capacity of the water production branch exceeds the preset water volume. If it is determined that the water production capacity of the water production branch exceeds the preset water volume, then the water production branch is determined to meet the flushing conditions. The water production capacity includes the water volume produced in a single cycle or the sum of the water volumes produced in the most recent N cycles; or...

[0118] Determine whether the number of water production cycles of the water production branch exceeds the preset number of water production cycles. If it is determined that the number of water production cycles of the water production branch exceeds the preset number of water production cycles, then the water production branch is determined to meet the flushing conditions. The number of water production cycles includes the sum of the number of water production cycles between the current time point and the time point when the most recent flushing of the water production branch ends, or the total number of water production cycles within the water production life cycle of the water production branch.

[0119] As can be seen, the method described in the embodiments of the present invention can provide a multi-stage flushing and water production control mechanism, and adopt a dual-filtration component structure. Through the flushing operation between the filter unit groups and the burst flushing process of the pre-filter, it can achieve the purpose of rapid flushing while saving water consumption in the flushing process. It also proposes a variety of methods to detect whether the filter element meets the flushing conditions, which can more accurately monitor the use of the filter element, so as to achieve precise flushing of the filter element, avoid unnecessary flushing operations, further improve the flushing effect of the filter element, and increase the water production rate of the system.

[0120] Example 2

[0121] Please see Figure 2 , Figure 2 This is a schematic flowchart of another intelligent water purification control method disclosed in an embodiment of the present invention. Figure 2 As shown, the intelligent water purification control method may include the following operations:

[0122] 201. Determine whether the water production branch meets the flushing conditions.

[0123] 202. When it is determined that the water production branch meets the flushing conditions, control the water purification system to perform the flushing operation.

[0124] 203. During the first stage of rinsing, while controlling the water purification system to perform the first rinsing operation, control the wastewater return branch to perform the first wastewater return operation.

[0125] In this embodiment of the invention, the first wastewater recirculation operation is used to recirculate the wastewater discharged from the second wastewater outlet back to the booster device and then input it into the product water branch to maintain the water quality balance between the first and second filter cartridges; and to close the wastewater discharge branch. During the first stage of rinsing, the wastewater is recirculated downstream of the pre-filter through the first wastewater recirculation operation and input into the product water branch via the booster device, which can maintain the TDS balance of the filter cartridges. At this time, the wastewater discharge branch can also be closed to save rinsing water.

[0126] 204. During the second stage of rinsing, control the water purification system to perform the second rinsing operation.

[0127] 205. During the third stage of rinsing, control the water purification system to perform the third rinsing operation.

[0128] 206. Determine whether the water production branch meets the water production conditions.

[0129] 207. When it is determined that the water production branch meets the water production conditions, control the water purification system to perform the first stage of water production and the second stage of water production.

[0130] 208. During the first stage of water production, while controlling the water purification system to perform the first water production operation, control the wastewater return branch to perform the second wastewater return operation.

[0131] In this embodiment of the invention, the second wastewater recirculation operation controls the wastewater recirculation branch to recirculate the wastewater discharged from the second wastewater outlet back to the booster device and then input it into the first filtration unit group, so that the pure water produced by the first filtration unit group is discharged through the pure water discharge branch. During the first stage of water production, the pure water produced by the second filtration unit group is recirculated upstream of the pre-filter, while the wastewater produced by the second filtration unit group is recirculated downstream of the pre-filter via the wastewater recirculation branch. After mixing at the booster device, it is input into the first filtration unit group, so that the pure water produced by the first filtration unit group is discharged through the pure water discharge branch for use.

[0132] 209. During the second stage of water production, control the water purification system to perform the second water production operation.

[0133] In this embodiment of the invention, for other descriptions of steps 201-209, please refer to the detailed description of steps 101-109 in Embodiment 1 respectively. This embodiment of the invention will not repeat them.

[0134] As can be seen, the method described in the embodiments of the present invention can provide a multi-stage rinsing and water production control mechanism, and adopt a dual-filtration component structure. Through the rinsing operation between the filter unit groups and the burst rinsing process of the pre-filter, it can achieve the purpose of rapid rinsing while saving water consumption in the rinsing process. At the same time, it can continue to perform mixed water production operation through wastewater recirculation, forming the reuse of mixed water in the pre-filter and wastewater in the water production process, thus achieving the purpose of secondary water saving. It can solve the problem of poor water quality in the first cup when users take water, and at the same time improve the water production rate of the water purifier and avoid water waste.

[0135] In an optional embodiment, the method may further include:

[0136] During the first stage of water production or the second stage of water production, if the first water quality value at the second wastewater outlet exceeds the second water quality threshold, or if the second water quality value at the first filter inlet exceeds the third water quality threshold, the wastewater return branch is controlled to shut down.

[0137] In this embodiment of the invention, whether in the first or second stage of water production, the opening or closing of the wastewater return branch can be controlled by monitoring whether the water quality value at the wastewater outlet or the filter inlet exceeds the standard. Simultaneously, the wastewater recycling ratio can be adjusted based on the aforementioned parameters to achieve precise wastewater utilization.

[0138] As can be seen, the method described in the embodiments of the present invention can provide a multi-stage rinsing and water production control mechanism, while adopting a dual-filtration component structure. Through the rinsing operation between the filter unit groups and the burst flushing process of the pre-filter, it can achieve the purpose of rapid rinsing while saving water consumption in the rinsing process. It also provides a flexible control mode, dynamically adjusting the wastewater recycling ratio without increasing the salinity of the filter element, achieving a level of fine control of wastewater return, which is conducive to achieving precise rinsing of the filter element, while increasing the wastewater recycling rate, and further improving the water production rate of the filtration system.

[0139] Example 3

[0140] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of an intelligent water purification system disclosed in an embodiment of the present invention. Wherein, as... Figure 3As shown, the intelligent water purification system includes a raw water branch, a product water branch, a wastewater discharge branch, and a pure water discharge branch. A booster device 3 is installed on the raw water branch. The booster device 3 generates a water pressure difference, which allows pressurized water to permeate through the filter element. It can also control the recirculation of water in the pure water return branch and the wastewater return branch. The booster device 3 is located upstream of the product water branch. The filter element can be a regular filter element or a reverse osmosis filter element; this embodiment of the invention does not limit the specific type. The water purification system may also include:

[0141] The water production branch includes a first filtration unit group 1 and a second filtration unit group 2. The first filtration unit group 1 includes a first filter element inlet, a first filter element assembly, a first wastewater outlet, and a first pure water outlet. The second filtration unit group 2 includes a second filter element inlet, a second filter element assembly, a second wastewater outlet, and a second pure water outlet. The first wastewater outlet is connected to the second filter element inlet, and both the first pure water outlet and the second pure water outlet are connected to the pure water discharge branch.

[0142] The first pure water return branch intersects with the pure water discharge branch at the first pure water return intersection point A, and intersects with the raw water branch at the second pure water return intersection point B; the second pure water return branch has one end connected to the second pure water outlet, and the other end intersects with the first pure water return branch at the third pure water return intersection point C, which is located between the first pure water return intersection point A and the second pure water return intersection point B;

[0143] A pre-filter 5 is also installed on the raw water branch. The pre-filter 5 is used to buffer the raw water in the raw water branch and / or the pure water returned from the first pure water return branch and / or the pure water returned from the second pure water return branch. The pre-filter 5 is located downstream of the second pure water return intersection B and upstream of the booster device 3.

[0144] The water purification system is used to perform flushing operations when it is determined that the water production branch meets the flushing conditions. The flushing operations include first-stage flushing, and / or second-stage flushing, and / or third-stage flushing.

[0145] During the first stage of rinsing, the first pure water return branch and the second pure water return branch are used to return the pure water generated by the first filter unit group 1 and the second filter unit group 2 to the pre-filter 5, so as to push the water in the pre-filter 5 to the pressurizing device 3 and then input it into the water production branch to rinse the first filter element assembly and the second filter element assembly.

[0146] During the second stage of rinsing, the first pure water return branch is closed, and the second pure water return branch is used to return the pure water generated by the second filter unit group 2 to the pre-filter 5, so that the water in the pre-filter 5 is pushed to the pressurizing device 3 and then input into the water production branch to rinse the first filter element assembly and the second filter element assembly.

[0147] During the third stage of rinsing, the wastewater discharge branch is opened, and the pre-filter 5 is used to push the water it has buffered to the booster 3 in a large flow rate and then input it into the production water branch to flush the first filter element assembly and the second filter element assembly.

[0148] The water production branch is used to carry out the first stage of water production and the second stage of water production when it is determined that the water production branch meets the water production conditions.

[0149] In the first stage of water production, the second pure water return branch is used to return the pure water produced by the second filter unit group 2 and mix it with the raw water before inputting it into the pre-filter 5 and then into the first filter unit group 1 through the booster device 3, so that the pure water produced by the first filter unit group 1 can be discharged through the pure water discharge branch.

[0150] In the second stage of water production, the water production branch is used to discharge the pure water produced by the first filtration unit group 1 and the second filtration unit group 2 through the pure water discharge branch.

[0151] As can be seen, the intelligent water purification system described in this embodiment of the invention can provide a multi-stage flushing and water production control mechanism. At the same time, it adopts a dual-filtration component structure. Through the flushing operation between the filter unit groups and the burst flushing process of the pre-filter, it achieves the purpose of rapid flushing while saving water consumption in the flushing process. This allows for effective flushing and water production of the water purification system, significantly improving the intelligent control level of the water purification system, increasing the flushing efficiency of the filter element, increasing the water production rate of the water purification system, improving the quality of the first cup water, and avoiding waste of water resources.

[0152] In an optional embodiment, such as Figure 4 As shown, the water purification system may also include:

[0153] The wastewater return branch intersects with the wastewater discharge branch at the first wastewater return intersection point D, and the wastewater return branch intersects with the raw water branch at the second wastewater return intersection point E; the second wastewater return intersection point E is located upstream of the booster device 3;

[0154] During the first stage of rinsing, the wastewater return branch is used to return the wastewater discharged from the second wastewater outlet to the booster device 3 and then input it into the product water branch to maintain the water quality balance between the first filter element assembly and the second filter element assembly; the wastewater discharge branch is closed.

[0155] In another optional embodiment, a first pure water reflux valve assembly 7 and a second pure water reflux valve assembly 8 are provided on the first pure water reflux branch. The first pure water reflux valve assembly 7 is located between the first pure water reflux intersection point A and the third pure water reflux intersection point C, and the second pure water reflux valve assembly 8 is located between the second pure water reflux intersection point B and the third pure water reflux intersection point C. A wastewater reflux valve assembly 6 is provided on the wastewater reflux branch. A pure water valve assembly 9 is provided on the pure water discharge branch. A wastewater valve assembly 17 is provided on the wastewater discharge branch.

[0156] In yet another optional embodiment, the water purification system further includes:

[0157] A water quality testing device is installed on the branch road connected to the second wastewater outlet. The water quality testing device is used to monitor the real-time water quality value of the second wastewater outlet.

[0158] The water quality testing device includes:

[0159] The first water quality testing device 4 is installed at the second wastewater outlet; or / and,

[0160] A second water quality monitoring device 11 is installed on the wastewater return branch; or / and,

[0161] A third water quality testing device 12 is installed on the wastewater discharge branch.

[0162] Optionally, when the wastewater return branch and the wastewater discharge branch share a branch, a wastewater proportioning device 10 is provided on the branch shared by the wastewater return branch and the wastewater discharge branch. The wastewater proportioning device 10 is used to adjust the proportion of wastewater discharged from the wastewater outlet flowing into the wastewater return branch and the wastewater discharge branch respectively.

[0163] Optionally, a fourth water quality testing device 13 is installed at the first wastewater outlet, which is used to test the water quality at the first wastewater outlet.

[0164] Optionally, a fifth water quality detection device 16 is installed on the first pure water return branch. The fifth water quality detection device 16 is located between the first pure water outlet and the first pure water return intersection point A. The fifth water quality detection device 16 is used to detect the water quality of the first pure water outlet.

[0165] Optionally, a sixth water quality detection device 14 is installed on the second pure water return branch. The sixth water quality detection device 14 is located between the intersection point C of the second pure water outlet and the third pure water return. The sixth water quality detection device 14 is used to detect the water quality of the second pure water outlet.

[0166] Optionally, a seventh water quality testing device 15 is installed on the raw water branch. The seventh water quality testing device 15 is located between the second pure water return intersection B and the inlet of the first filter element. The seventh water quality testing device 15 is used to detect the water quality at the inlet of the first filter element.

[0167] Example 4

[0168] Please see Figure 5 , Figure 5 This is a structural schematic diagram of another intelligent water purification control device disclosed in an embodiment of the present invention. Figure 5 The described device can be a standalone device or integrated into an intelligent water purification system; this embodiment of the invention does not limit the scope. Figure 5 As shown, the intelligent water purification control device may include:

[0169] Memory 401 storing executable program code;

[0170] Processor 402 coupled to memory 401;

[0171] The processor 402 calls the executable program code stored in the memory 401 to execute some or all of the steps in the intelligent water purification control method disclosed in Embodiment 1 or Embodiment 2 of the present invention.

[0172] Example 5

[0173] This invention discloses a computer storage medium storing computer instructions. When these computer instructions are invoked, they are used to execute the steps in the intelligent water purification control method disclosed in Embodiment 1 or Embodiment 2 of this invention.

[0174] The device embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0175] Through the detailed description of the above embodiments, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, including read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically-Erasable Programmable Read-Only Memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0176] It should be noted that the computer program code required for the operation of each part of this manual can be written in any one or more programming languages, including object-oriented programming languages ​​such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C++, C#, VB .NET, Python, etc.; conventional procedural programming languages ​​such as C, Visual Basic, Fortran2003, Perl, COBOL2002, PHP, ABAP; dynamic programming languages ​​such as Python, Ruby, and Groovy; or other programming languages. This program code can run entirely on a computer (PC, embedded intelligent device, etc.), or as a standalone software package on the user's computer, or partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the latter case, the remote computer can be connected to the user's computer through any network, such as a local area network (LAN) or wide area network (WAN), or connected to an external computer (e.g., via the Internet), or in a cloud computing environment, or used as a service such as Software as a Service (SaaS).

[0177] Finally, it should be noted that the intelligent water purification control method and intelligent water purification system disclosed in the embodiments of the present invention are merely preferred embodiments of the present invention, and are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to 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 the present invention.

Claims

1. A smart water purification control method, the method being applied to a water purification system, the water purification system comprising a raw water branch, a booster device, a product water branch, a wastewater discharge branch, and a pure water discharge branch, wherein a booster device is provided on the raw water branch, the booster device being used to generate a water pressure difference, the booster device being located upstream of the product water branch, characterized in that, A pre-filter is also installed on the raw water branch. The product water branch includes a first filtration unit group and a second filtration unit group. The first filtration unit group includes a first filter element inlet, a first filter element assembly, a first wastewater outlet, and a first pure water outlet. The second filtration unit group includes a second filter element inlet, a second filter element assembly, a second wastewater outlet, and a second pure water outlet. The first wastewater outlet is connected to the second filter element inlet. Both the first pure water outlet and the second pure water outlet are connected to the pure water discharge branch. The first pure water outlet is also connected to a first pure water return branch. The second pure water outlet is also connected to a second pure water return branch. The second wastewater outlet is connected to the wastewater discharge branch. The method includes: Determine whether the water production branch meets the flushing conditions; When it is determined that the water production branch meets the flushing conditions, the water purification system is controlled to perform a flushing operation, which includes a first-stage flushing, a second-stage flushing, and a third-stage flushing. During the first stage of rinsing, the water purification system is controlled to perform a first rinsing operation. The first rinsing operation is used to return the pure water produced by the first filter unit group and the second filter unit group to the pre-filter through the first pure water return branch and the second pure water return branch, respectively, so as to push the water in the pre-filter to the pressurization device and then input it into the water production branch to rinse the first filter element assembly and the second filter element assembly. During the second stage of rinsing, the water purification system is controlled to perform a second rinsing operation. The second rinsing operation is used to close the first pure water return branch and return the pure water generated by the second filter unit group to the pre-filter via the second pure water return branch, so as to push the water in the pre-filter to the pressurization device and then input it into the water production branch to rinse the first filter element assembly and the second filter element assembly. During the third stage of rinsing, the water purification system is controlled to perform a third rinsing operation. The third rinsing operation is used to open the wastewater discharge branch and push the water in the pre-filter to the booster device in a high flow rate and then input it into the production water branch to flush the first filter element assembly and the second filter element assembly. Determine whether the water production branch meets the water production conditions; When it is determined that the water production branch meets the water production conditions, the water purification system is controlled to perform the first stage of water production and the second stage of water production. During the first stage of water production, the water purification system is controlled to perform a first water production operation. The first water production operation is used to control the pure water produced by the second filtration unit group to be returned through the second pure water return branch and mixed with the raw water before being input into the pre-filter and then into the first filtration unit group through the pressurization device, so that the pure water produced by the first filtration unit group is discharged through the pure water discharge branch. During the second stage of water production, the water purification system is controlled to perform a second water production operation, which is used to discharge the pure water produced by the first filter unit group and the second filter unit group through the pure water discharge branch respectively. In addition, the second wastewater outlet is also connected to a wastewater return branch; During the first stage of rinsing, the method further includes: The wastewater return branch is controlled to perform a first wastewater return operation, which is used to return the wastewater discharged from the second wastewater outlet to the booster device and then input it into the product water branch to maintain the water quality balance between the first filter element assembly and the second filter element assembly; and to close the wastewater discharge branch.

2. The intelligent water purification control method according to claim 1, characterized in that, During the first stage of water production, the method further includes: The wastewater return branch is controlled to perform a second wastewater return operation. The second wastewater return operation is used to control the wastewater return branch to return the wastewater discharged from the second wastewater outlet to the booster device and then input it into the first filter unit group, so that the pure water produced by the first filter unit group is discharged through the pure water discharge branch.

3. The intelligent water purification control method according to claim 2, characterized in that, The method further includes: During the first stage of water production, it is determined whether the first stage of water production is completed. If it is determined that the first stage of water production is completed, the second stage of water production is started. The determination of whether the water production in the first stage is completed includes: Determine whether the duration of water production in the first stage exceeds a first preset duration. If it is determined that the duration of water production in the first stage exceeds the first preset duration, then it is determined that the water production in the first stage has been completed; or, Determine whether the first water quality value at the second wastewater outlet exceeds the first water quality threshold. If it is determined that the first water quality value at the second wastewater outlet exceeds the first water quality threshold, then it is determined that the first stage of water production has been completed.

4. The intelligent water purification control method according to claim 3, characterized in that, The method further includes: When the first stage of water production or the second stage of water production is performed, if it is determined that the first water quality value at the outlet of the second wastewater exceeds the second water quality threshold, or if it is determined that the second water quality value at the inlet of the first filter element exceeds the third water quality threshold, the wastewater return branch is controlled to perform a shutdown operation.

5. The intelligent water purification control method according to claim 3 or 4, characterized in that, The determination of whether the water production branch meets the flushing conditions includes: Determine whether the third water quality value at the first wastewater outlet exceeds the fourth water quality threshold. If it is determined that the first water quality value exceeds the fourth water quality threshold, then it is determined that the product water branch meets the flushing conditions; or, Determine whether the first water quality value at the second wastewater outlet exceeds the fifth water quality threshold. If it is determined that the first water quality value exceeds the fifth water quality threshold, then it is determined that the product water branch meets the flushing conditions; or, Determine whether the fourth water quality value at the first pure water outlet exceeds the sixth water quality threshold. If it is determined that the fourth water quality value exceeds the sixth water quality threshold, then it is determined that the water production branch meets the flushing conditions; or, Determine whether the fifth water quality value at the second pure water outlet exceeds the seventh water quality threshold. If the fifth water quality value exceeds the seventh water quality threshold, then determine that the water production branch meets the flushing conditions; or, Determine whether the sixth water quality value of the pure water discharge branch exceeds the eighth water quality threshold. If it is determined that the sixth water quality value exceeds the eighth water quality threshold, then it is determined that the water production branch meets the flushing conditions; or, Determine whether the time difference between the current time point and the time point when the most recent flushing of the water production branch ends exceeds a second preset time. If the time difference between the current time point and the time point when the most recent flushing of the water production branch ends exceeds the second preset time, then determine that the water production branch meets the flushing conditions; or, Determine whether the operating time of the water production branch exceeds a third preset time. If it is determined that the operating time of the water production branch exceeds the third preset time, then it is determined that the water production branch meets the flushing conditions. The operating time includes the operating time of a single water production cycle or the total operating time of the most recent N water production cycles; or... Determine whether the water production capacity of the water production branch exceeds a preset water volume. If it is determined that the water production capacity of the water production branch exceeds the preset water volume, then it is determined that the water production branch meets the flushing conditions. The water production capacity includes the water volume produced in a single cycle or the sum of the water volumes produced in the most recent N cycles; or... Determine whether the number of water production cycles of the water production branch exceeds the preset number of water production cycles. If it is determined that the number of water production cycles of the water production branch exceeds the preset number of water production cycles, then it is determined that the water production branch meets the flushing conditions. The number of water production cycles includes the sum of the number of water production cycles between the current time point and the time point when the most recent flushing of the water production branch ends, or the total number of water production cycles within the water production life cycle of the water production branch.

6. An intelligent water purification system, comprising a raw water branch, a product water branch, a wastewater discharge branch, and a pure water discharge branch, wherein a booster device is provided on the raw water branch to generate a water pressure difference, and the booster device is located upstream of the product water branch, characterized in that, The water purification system also includes: The water production branch includes a first filtration unit group and a second filtration unit group. The first filtration unit group includes a first filter element inlet, a first filter element assembly, a first wastewater outlet, and a first pure water outlet. The second filtration unit group includes a second filter element inlet, a second filter element assembly, a second wastewater outlet, and a second pure water outlet. The first wastewater outlet is connected to the second filter element inlet, and both the first pure water outlet and the second pure water outlet are connected to the pure water discharge branch. The first pure water return branch intersects with the pure water discharge branch at a first pure water return intersection point, and the first pure water return branch intersects with the raw water branch at a second pure water return intersection point; the second pure water return branch has one end connected to the second pure water outlet, and the other end intersects with the first pure water return branch at a third pure water return intersection point, the third pure water return intersection point being located between the first pure water return intersection point and the second pure water return intersection point; A pre-filter is also provided on the raw water branch line. The pre-filter is used to buffer the raw water in the raw water branch line, the pure water returned from the first pure water return branch line, and the pure water returned from the second pure water return branch line. The pre-filter is located downstream of the intersection of the second pure water return branch line and upstream of the booster device. The water purification system is used to perform a flushing operation when it is determined that the water production branch meets the flushing conditions. The flushing operation includes a first-stage flushing, a second-stage flushing, and a third-stage flushing. During the first stage of rinsing, the first pure water return branch and the second pure water return branch are used to return the pure water generated by the first filter unit group and the second filter unit group to the pre-filter device, so as to push the water in the pre-filter device to the pressurization device and then input it into the water production branch to rinse the first filter element assembly and the second filter element assembly. During the second stage of rinsing, the first pure water return branch is closed, and the second pure water return branch is used to return the pure water generated by the second filter unit group to the pre-filter, so as to push the water in the pre-filter to the pressurization device and then input it into the water production branch to rinse the first filter element assembly and the second filter element assembly. During the third stage of rinsing, the wastewater discharge branch is opened, and the pre-filter is used to push the water it has buffered out in a large flow rate to the booster device and then input it into the production water branch to flush the first filter element assembly and the second filter element assembly. The water production branch is used to perform the first stage of water production and the second stage of water production when it is determined that the water production branch meets the water production conditions. In the first stage of water production, the second pure water return branch is used to return the pure water produced by the second filtration unit group and mix it with the raw water before inputting it into the pre-filter and then into the first filtration unit group through the pressurization device, so that the pure water produced by the first filtration unit group can be discharged through the pure water discharge branch. In the second stage of water production, the water production branch is used to discharge the pure water produced by the first filtration unit group and the second filtration unit group through the pure water discharge branch respectively. In addition, the water purification system also includes: The wastewater return branch intersects with the wastewater discharge branch at a first wastewater return intersection point, and the wastewater return branch intersects with the raw water branch at a second wastewater return intersection point; the second wastewater return intersection point is located upstream of the booster device; During the first stage of rinsing, the wastewater return branch is used to return the wastewater discharged from the second wastewater outlet to the booster device and then input it into the product water branch to maintain the water quality balance between the first filter element assembly and the second filter element assembly; the wastewater discharge branch is closed.

7. The intelligent water purification system according to claim 6, characterized in that, The first pure water return branch is equipped with a first pure water return valve assembly and a second pure water return valve assembly. The first pure water return valve assembly is located between the first pure water return intersection point and the third pure water return intersection point, and the second pure water return valve assembly is located between the second pure water return intersection point and the third pure water return intersection point. The wastewater return branch is equipped with a wastewater return valve assembly. The pure water discharge branch is equipped with a pure water valve assembly. The wastewater discharge branch is equipped with a wastewater valve assembly.

8. The intelligent water purification system according to claim 6 or 7, characterized in that, The water purification system also includes: A water quality testing device is installed on the branch line connected to the second wastewater outlet. The water quality testing device is used to monitor the real-time water quality value of the second wastewater outlet. The water quality testing device includes: A first water quality detection device is installed at the second wastewater outlet; or / and, A second water quality detection device is installed on the wastewater return branch; or / and, The third water quality testing device is installed on the wastewater discharge branch.

9. The intelligent water purification system according to claim 8, characterized in that, When the wastewater return branch and the wastewater discharge branch share a portion of the branch, a wastewater proportioning device is provided on the shared branch. The wastewater proportioning device is used to adjust the proportion of wastewater discharged from the wastewater outlet flowing into the wastewater return branch and the wastewater discharge branch respectively.

10. The intelligent water purification system according to claim 9, characterized in that, A fourth water quality detection device is installed at the first wastewater outlet, which is used to detect the water quality at the first wastewater outlet.

11. The intelligent water purification system according to claim 10, characterized in that, A fifth water quality detection device is installed on the first pure water return branch. The fifth water quality detection device is located between the first pure water outlet and the first pure water return point. The fifth water quality detection device is used to detect the water quality of the first pure water outlet.

12. The intelligent water purification system according to claim 11, characterized in that, A sixth water quality detection device is installed on the second pure water return branch. The sixth water quality detection device is located between the intersection of the second pure water outlet and the third pure water return point. The sixth water quality detection device is used to detect the water quality of the second pure water outlet.

13. The intelligent water purification system according to claim 12, characterized in that, A seventh water quality testing device is installed on the raw water branch line. The seventh water quality testing device is located between the intersection of the second pure water return and the inlet of the first filter element. The seventh water quality testing device is used to detect the water quality at the inlet of the first filter element.

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