Renewable waterway system and water purifier

By designing a regenerable water circuit system in the water purifier, and utilizing the gradient settings and reverse flow of the water storage tank and electrodialysis filter cartridges, the problem of insufficient water supply during the regeneration of multiple filter cartridges in the water purifier is solved, achieving uninterrupted water supply and reducing energy consumption.

CN224242803UActive Publication Date: 2026-05-15GUANGDONG LIZI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
GUANGDONG LIZI TECH CO LTD
Filing Date
2025-05-20
Publication Date
2026-05-15

AI Technical Summary

Technical Problem

Existing water purifiers cannot provide a continuous water supply when all multiple electrodialysis filter cartridges need to be regenerated, resulting in a significant reduction in users' water usage time and affecting daily applications.

Method used

Design a regenerative water system that uses a water storage tank and at least two electrodialysis filter cartridges to achieve self-regeneration of the electrodialysis filter cartridges by setting a water production differential gradient and a reverse process. This ensures that at least one electrodialysis filter cartridge can still supply water during regeneration and can be flushed with pure water from the water storage tank, avoiding reliance on other filter cartridges for water production.

Benefits of technology

This ensures uninterrupted water supply for the water purifier, guaranteeing users' water needs while reducing the purifier's energy consumption.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a renewable waterway system and a water purifier, the renewable waterway system comprises: a pipeline system, the pipeline system is provided with a water storage tank and at least two electrodialysis filter elements with an ion adsorption function, raw water can be produced by any electrodialysis filter element and then is discharged, and a part of pure water can be distributed to flow into the water storage tank for storage; under the working condition of electrodialysis filter element regeneration, in the early stage of regeneration, raw water reversely flows through the electrodialysis filter element to be regenerated and wastewater is discharged, and in the later stage of regeneration, pure water stored in the water storage tank reversely flows through the electrodialysis filter element to be regenerated so as to wash the electrodialysis filter element; the at least two electrodialysis filter elements are arranged in a gradient manner according to the water production quantity difference value A, and when any electrodialysis filter element is regenerated, at least one electrodialysis filter element produces water to discharge water. The regeneration of the electrodialysis filter element can be realized, and the real-time water supply of the water purifier can be ensured, so that the water demand of a user is ensured.
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Description

Technical Field

[0001] This utility model relates to the field of water purification equipment technology, and in particular to a renewable water system and a water purifier. Background Technology

[0002] A water purifier is a water treatment device that performs deep filtration and purification of water according to usage requirements. It achieves desalination and regeneration processes through electrodialysis filter cartridges. Electrodialysis filter cartridges regenerate through mutual regeneration, meaning that two or more cartridges are needed. When one cartridge is regenerating, the others simultaneously undergo desalination and water production. At least a portion of the produced water is used for the regeneration of the cartridge requiring regeneration, resulting in a significant reduction in the amount of water supplied to the user.

[0003] To address the aforementioned issues, existing technology discloses a bipolar membrane electro-assisted deionization system. This system includes a piping system, at least one electrodialysis filter cartridge with a bipolar membrane electro-assisted deionization device structure, and a water storage tank for storing water produced by the electrodialysis filter cartridge outside the standard range during desalination and for providing regeneration water for the electrodialysis filter cartridge. Both the electrodialysis filter cartridge and the water storage tank are integrated into the piping system. The electrodialysis filter cartridge can store a portion of the produced water in the water storage tank as regeneration water. During regeneration, the regeneration water in the storage tank regenerates the electrodialysis filter cartridge, eliminating the need for another electrodialysis filter cartridge to produce water in real-time and regenerate itself, thus achieving self-regeneration of the electrodialysis filter cartridge. However, this solution has a limitation: multiple electrodialysis filter cartridges all require regeneration. In this case, the entire water purifier does not produce water, significantly reducing the user's water-producing time and causing inconvenience in daily use. Utility Model Content

[0004] To address the aforementioned deficiencies in the prior art, the present invention aims to provide a renewable water system and water purifier that can regenerate the electrodialysis filter cartridge and ensure real-time water supply to meet the user's water needs.

[0005] The first aspect of this utility model provides a renewable water system, including: a pipeline system, a water storage tank and at least two electrodialysis filter cartridges with ion adsorption function in the pipeline system, the raw water can be processed by any electrodialysis filter cartridge and then discharged, and a portion of the pure water can be distributed to the water storage tank for storage.

[0006] During the regeneration of the electrodialysis filter cartridge, in the early stage of regeneration, the raw water flows back through the electrodialysis filter cartridge that needs to be regenerated and the wastewater is discharged. In the later stage of regeneration, the pure water stored in the water tank flows back through the electrodialysis filter cartridge that needs to be regenerated to rinse it.

[0007] At least two electrodialysis filter cartridges are set in a gradient with a water production difference A. When any electrodialysis filter cartridge is regenerated, at least one electrodialysis filter cartridge produces water to output water.

[0008] In a preferred embodiment, in this invention, the difference in water production A is calculated as a percentage, based on the electrodialysis filter cartridge with the lowest water production.

[0009] In a preferred embodiment of this invention, when the difference in water production is less than A, the raw water is purified by passing through an electrodialysis filter cartridge with a lower remaining water production capacity before being discharged.

[0010] In a preferred embodiment, at least two electrodialysis filter cartridges are connected in parallel and stacked in this invention.

[0011] In a preferred embodiment of this invention, raw water flows forward through the raw water pipe, passes through the electrodialysis filter cartridge to produce water, and then exits through the outlet pipe. Raw water flows backward through the regeneration pipe, passes through the electrodialysis filter cartridge, and then exits through the wastewater pipe to produce wastewater. Each electrodialysis filter cartridge is connected to a water storage tank through its connected outlet pipe.

[0012] In a preferred embodiment of this invention, a power pump is installed on the pipeline between the water storage tank and the electrodialysis filter element.

[0013] In a preferred embodiment of this invention, the raw water pipeline is equipped with a raw water valve, the outlet water pipeline is equipped with an outlet water valve, the regeneration pipeline is equipped with a regeneration valve, and the wastewater pipeline is equipped with a wastewater valve. The raw water valve, outlet water valve, regeneration valve, and wastewater valve all include at least one of a straight-through valve, a three-way valve, and a four-way valve.

[0014] In a preferred embodiment, flow meters are installed on both the raw water pipe and the outlet water pipe in this invention, and TDS meters are installed on the raw water pipe, the outlet water pipe, and the wastewater pipe.

[0015] In a preferred embodiment of this invention, a pre-filter is provided on the raw water pipe, and the raw water pipe can be directly connected to the outlet water pipe.

[0016] The second aspect of this utility model provides a water purifier, including: the above-mentioned renewable water circuit system.

[0017] The renewable water system and water purifier provided by this utility model have the following technical effects:

[0018] At least two electrodialysis filter cartridges have a difference in water production capacity, ensuring that at least one cartridge can produce water during regeneration, guaranteeing an uninterrupted water supply to the user and meeting their water needs. Furthermore, the regeneration of the electrodialysis filter cartridges involves initially passing raw water in reverse through the cartridge, using reverse electrostatic discharge to achieve ion desorption, followed by rinsing with pure water from the storage tank. The storage tank is then filled with pure water produced by the regenerated electrodialysis filter cartridges. Therefore, the regeneration of the electrodialysis filter cartridges does not require pure water produced by other cartridges, ensuring a consistent water supply for the user and reducing the water purifier's energy consumption. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the renewable water system of this utility model.

[0020] Figure label:

[0021] 1. Water storage tank; 2. Power pump; 3. Flow meter; 4. TDS meter; 5. Pre-filter; 6. Electrodialysis filter element 1; 7. Electrodialysis filter element 2; 8. Main raw water pipeline; 9. Raw water pipeline 1; 10. Raw water pipeline 2; 11. Three-way valve 1; 12. Three-way valve 2; 13. Wastewater pipeline 1; 14. Three-way valve 3; 15. Wastewater pipeline 2; 16. Regeneration pipeline 1; 17. Three-way valve 4; 18. Outlet pipeline 1; 19. Three-way valve 5; 20. Regeneration pipeline 2; 21. Three-way valve 6; 22. Outlet pipeline 2; 23. Three-way valve 7; 24. Main outlet pipeline; 25. Three-way valve 8. Detailed Implementation

[0022] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0025] This utility model provides a renewable water system, including: a pipeline system, a water storage tank 1, and at least two electrodialysis filter cartridges with ion adsorption function. Raw water can be processed by any electrodialysis filter cartridge and discharged, and a portion of pure water can be allocated to the water storage tank 1 for storage. During the regeneration of the electrodialysis filter cartridges, in the early stage of regeneration, the raw water flows in reverse through the electrodialysis filter cartridge to be regenerated and discharges wastewater. In the later stage of regeneration, the pure water stored in the water storage tank 1 flows in reverse through the electrodialysis filter cartridge to be regenerated for rinsing. The at least two electrodialysis filter cartridges are set in a gradient with a water production difference A. When any electrodialysis filter cartridge is regenerated, at least one electrodialysis filter cartridge produces water for discharge.

[0026] At least two electrodialysis filter cartridges have a difference in water production capacity, ensuring that at least one cartridge can produce water during regeneration, thus guaranteeing an uninterrupted water supply to the user and meeting their water needs. Furthermore, the regeneration of the electrodialysis filter cartridges involves initially passing raw water in reverse through the cartridge, using reverse current to achieve ion desorption, followed by rinsing with pure water from the storage tank 1. The storage tank 1 is then filled with pure water produced by the regenerated electrodialysis filter cartridges. Therefore, the regeneration of the electrodialysis filter cartridges does not require pure water produced by other cartridges, ensuring a sufficient water supply for the user and reducing the water purifier's energy consumption.

[0027] The pure water in the water storage tank 1 is supplied by the water production of the electrodialysis filter cartridge. The capacity of the water storage tank 1 can meet the complete regeneration of at least one electrodialysis filter cartridge, and after the electrodialysis filter cartridge is regenerated, the electrodialysis filter cartridge can produce water first to fill the water storage tank 1.

[0028] During regeneration, raw water flows in reverse through at least one electrodialysis filter element requiring regeneration. This filter element is energized in reverse to desorb ions from its membrane surface. Simultaneously, at least one electrodialysis filter element processes the raw water to produce water for user consumption. At this stage, the electrodialysis filter element requiring regeneration, the water-producing filter element, and the water storage tank 1 are not connected. Later in the regeneration process, the water storage tank 1 connects to the regenerated filter element to provide pure water for rinsing, ensuring complete regeneration.

[0029] It should be noted that this utility model can be multiple electrodialysis filter cartridges that are flushed and regenerated in a water storage tank 1, or a single electrodialysis filter cartridge that is flushed and regenerated. The specific implementation method depends on the number of electrodialysis filter cartridges, the capacity of the water storage tank 1, and the actual working conditions.

[0030] When only water production is in operation, raw water is produced by at least one electrodialysis filter element, and the electrodialysis filter element producing water is disconnected from the water storage tank 1. The electrodialysis filter element of this invention can produce water simultaneously, or part of it can produce water while the other part is not working. The specific implementation method depends on the actual working conditions.

[0031] Specifically, taking the electrodialysis filter cartridge with the lowest water production as the benchmark, the water production difference A is calculated as a percentage, ranging from 20% to 50%. That is, the water production difference A can be 20%, 25%, 30%, 35%, 40%, 45%, 50%, etc., set according to the differences in the number of electrodialysis filter cartridges and actual operating conditions. For example, when the number of electrodialysis filter cartridges is small, the water production difference can be larger; when the number of electrodialysis filter cartridges is large, the water production difference can be smaller. Setting the water production difference ensures that at least one electrodialysis filter cartridge can produce water for the user during regeneration, guaranteeing a normal water usage experience.

[0032] The water production difference can be calculated by measuring the water production of each electrodialysis filter cartridge using a flow meter to ensure the accuracy of the water production difference. When the water production difference is less than A, the raw water flows through the electrodialysis filter cartridge with the lower remaining water production capacity and is then discharged to ensure that the water production difference can be restored to A. This ensures that when the electrodialysis filter cartridge with the lower water production capacity is regenerated, the other electrodialysis filter cartridges have a suitable water production capacity to stably produce water for users.

[0033] At least two electrodialysis filter cartridges are connected in parallel and stacked. This reduces the overall size of the electrodialysis filter cartridges, allowing them to occupy less space in a regenerative water system, thus enabling a more compact water purifier.

[0034] Based on the above structure, raw water flows forward through the raw water pipeline, passes through the electrodialysis filter cartridge to produce water, and then exits through the outlet pipeline. Raw water flows backward through the regeneration pipeline, passes through the electrodialysis filter cartridge, and then exits through the wastewater pipeline. Each electrodialysis filter cartridge is connected to the water storage tank 1 through its connected outlet pipeline.

[0035] When only water production is in operation, the raw water pipeline is connected to the forward inlet of at least one electrodialysis filter element, and the forward outlet of the at least one electrodialysis filter element is directly connected to the outlet pipeline, and is disconnected from the wastewater pipeline and the water storage tank 1.

[0036] When both water production and regeneration are in operation simultaneously, during the initial regeneration phase, at least one electrodialysis filter element is in water production mode. The raw water pipeline is connected to the forward inlet of at least one electrodialysis filter element, and the forward outlet of this filter element is directly connected to the outlet pipeline, while remaining disconnected from the wastewater pipeline and storage tank 1, thus only water is supplied to the user. Simultaneously, at least one electrodialysis filter element is in regeneration mode. The raw water pipeline is connected to the reverse inlet of the regenerated electrodialysis filter element, and the reverse outlet of the regenerated filter element is connected to the wastewater pipeline, allowing reverse electro-current to desorb ions and discharge wastewater. During the later regeneration phase, the raw water supply to the regenerated electrodialysis filter element stops. Storage tank 1 is connected to the reverse inlet of the regenerated electrodialysis filter element to provide pure water for rinsing before being discharged through the wastewater pipeline. After the electrodialysis filter element has completed regeneration, raw water is introduced into the filter element through the raw water pipeline to produce water and then transported to storage tank 1, filling storage tank 1 completely.

[0037] A power pump 2 is installed on the pipeline between the water storage tank 1 and the electrodialysis filter element. When it is necessary to rinse the regenerated electrodialysis filter element, the power pump 2 is started to draw pure water from the water storage tank 1 to the electrodialysis filter element for rinsing, and then the water is discharged through the wastewater pipeline, thereby completing the regeneration of the electrodialysis filter element.

[0038] The raw water pipeline is equipped with a raw water valve, the effluent pipeline with an effluent valve, the regeneration pipeline with a regeneration valve, and the wastewater pipeline with a wastewater valve. Each of these valves includes at least one of the following: a straight-through valve, a three-way valve, or a four-way valve. The raw water valve, effluent valve, regeneration valve, and wastewater valve are named according to their function to control the opening and closing of each pipeline. One or two valves may share the same valve body, or, in cases with many electrodialysis filter cartridges, a valve with a specific name may have multiple valve bodies, depending on the actual operating conditions. The choice of whether a valve body is a straight-through valve, a three-way valve, or a four-way valve depends on the number of pipeline connections.

[0039] Flow meters 3 are installed on both the raw water pipeline and the effluent pipeline, and TDS meters 4 are installed on the raw water pipeline, effluent pipeline, and wastewater pipeline. The flow meters 3 are used to determine the raw water input flow rate and the water production capacity of each electrodialysis filter element, thereby ensuring the difference in water production capacity. The TDS meters 4 are used to detect the TDS values ​​of the raw water, effluent, and wastewater to determine whether they meet usage requirements and discharge standards.

[0040] A pre-filter cartridge 5 is installed on the raw water pipe, which can be directly connected to the outlet water pipe. The pre-filter cartridge 5 can be used to remove microorganisms, large particulate matter, etc. from the raw water. When the water quality requirements are not high, such as for cooking and washing, the raw water filtered by the pre-filter cartridge 5 can be used directly.

[0041] Based on the above statements, see Figure 1The following is a detailed description of a renewable water system including two electrodialysis filter cartridges connected in parallel. The operating principles of other three-cartridge and multi-cartridge systems are the same, and will not be repeated here.

[0042] The renewable water system includes a piping system and two electrodialysis filter cartridges, 6 and 7, connected in parallel within the piping system. Both cartridges are connected to raw water via raw water pipes. The raw water pipes include a main raw water pipe 8, a first raw water pipe 9, and a second raw water pipe 10. One end of the main raw water pipe 8 is connected to raw water, and the other end is connected to one end of both raw water pipe 9 and raw water pipe 10 via a three-way valve 11. The other end of raw water pipe 9 is connected to the forward inlet of electrodialysis filter cartridge 6, and a three-way valve 12 is installed on raw water pipe 9 to connect to wastewater pipe 13. The other end of raw water pipe 10 is connected to the forward inlet of electrodialysis filter cartridge 7, and a three-way valve 14 is installed on raw water pipe 10 to connect to wastewater pipe 15.

[0043] The other end of the main raw water pipe 8 is connected to one end of the regeneration pipe 16 via a three-way valve 11. The other end of the regeneration pipe 16 is connected to the positive outlet of the electrodialysis filter cartridge 6, and a three-way valve 17 is installed on the regeneration pipe 16 to connect to one end of the outlet pipe 18. Near the three-way valve 11, the raw water pipe 210 is equipped with a three-way valve 19 to divert water to one end of the regeneration pipe 20. The other end of the regeneration pipe 20 is connected to the positive outlet of the electrodialysis filter cartridge 7, and a three-way valve 21 is installed on the regeneration pipe 20 to connect to one end of the outlet pipe 22. The other end of water outlet pipe 18 and the other end of water outlet pipe 22 are both connected to the main water outlet pipe 24 via three-way valve 7 23 to discharge water, and are both connected to the inlet of water storage tank 1 via three-way valve 8 25. The outlet of water storage tank 1 is connected to water outlet pipe 18 of electrodialysis filter element 16 and water outlet pipe 22 of electrodialysis filter element 27 via power pump 2.

[0044] Flow meters 3 are installed on the main raw water pipe 8, the first outlet pipe 18, and the second outlet pipe 22. TDS meters 4 are installed on the main raw water pipe 8, the main outlet pipe 24, the first wastewater pipe 13, and the second wastewater pipe 15. A pre-filter 5 is installed on the main raw water pipe 8, following the direction of the raw water flow. The pre-filter 5 is located after the TDS meter 4 on the main raw water pipe 8.

[0045] Thus, the operating principle of this renewable water system is as follows:

[0046] There is a water production difference A between electrodialysis filter cartridge 6 and electrodialysis filter cartridge 7, which can be 20%, 25%, 30%, 35%, 40%, 45%, 50%, etc.

[0047] If only the electrodialysis filter cartridge 6 produces water, the raw water is initially filtered by the pre-filter cartridge 5 on the main raw water pipeline 8, then enters the raw water pipeline 9 through the three-way valve 11, flows through the three-way valve 2 12, and then enters the adsorption ion through the positive inlet of the electrodialysis filter cartridge 6 to produce water. After that, it flows out through the positive outlet of the electrodialysis filter cartridge 6 and then exits through the regeneration pipeline 16, the three-way valve 4 17, the outlet pipeline 18, the three-way valve 8 25, the three-way valve 7 23, and the main outlet pipeline 24. If only electrodialysis filter cartridge 27 produces water, the raw water is initially filtered by pre-filter cartridge 5 on the main raw water pipe 8, then enters the raw water pipe 20 through three-way valve 11, flows through three-way valve 5 19 and three-way valve 3 14, and then enters the adsorption ion port of electrodialysis filter cartridge 27 to produce water. Afterwards, it flows out through the positive outlet of electrodialysis filter cartridge 27 and exits through regeneration pipe 20, three-way valve 6 21, outlet pipe 22, three-way valve 7 23, and the main outlet pipe 24. If both electrodialysis filter cartridge 16 and electrodialysis filter cartridge 27 produce water, both water paths can be opened. Flow meter 3 is used to detect the flow rate of the main raw water pipe 8, outlet pipe 18, and outlet pipe 22 to control the water production difference A.

[0048] If only the electrodialysis filter cartridge 6 is being regenerated, in the initial stage of regeneration, the raw water is initially filtered by the pre-filter cartridge 5 on the main raw water pipe 8, then enters the regeneration pipe 16 through the three-way valve 11, and then enters the positive outlet of the electrodialysis filter cartridge 6 through the three-way valve 4 17. After reverse electro-ion desorption, it is discharged through the positive inlet of the electrodialysis filter cartridge 6, and then enters the wastewater pipe 13 through the three-way valve 2 12 to discharge wastewater. At this time, if the user wants to use water, the raw water is initially filtered by the pre-filter cartridge 5 on the main raw water pipe 8, then enters the raw water pipe 2 10 through the three-way valve 11, flows through the three-way valve 5 19 and the three-way valve 3 14, and then enters the positive inlet of the electrodialysis filter cartridge 2 7 to adsorb ions for water production. Then it flows out through the positive outlet of the electrodialysis filter cartridge 2 7 and then exits through the regeneration pipe 2 20, the three-way valve 6 21, the outlet pipe 2 22, the three-way valve 7 23 and the main outlet pipe 24. During the later stages of regeneration, the raw water supply to the electrodialysis filter cartridge 6 ceases. The power pump 2 starts, drawing pure water from the storage tank 1 and channeling it through the outlet pipe 18 and three-way valve 17 to the forward outlet of the electrodialysis filter cartridge 6. This flushes the cartridge and discharges it through its forward inlet, then through three-way valve 12 into the wastewater pipe 13 to discharge wastewater. After the electrodialysis filter cartridge 6 is regenerated, the raw water undergoes preliminary filtration through the pre-filter cartridge 5 on the main raw water pipe 8. It then flows through three-way valve 11 into the raw water pipe 9, passes through three-way valve 12, and enters the forward inlet of the electrodialysis filter cartridge 6 to adsorb ions for water purification. Finally, it flows out through the forward outlet of the electrodialysis filter cartridge 6 and through the regeneration pipe 16, three-way valve 17, outlet pipe 18, and three-way valve 25 into the storage tank 1, filling it with pure water for the next regeneration flush. Only the regeneration principle of the electrodialysis filter cartridge 27 is the same. During this process, the TDS meter 4 is used to detect the raw water quality, effluent water quality, and wastewater quality to determine whether the water quality is usable and meets the discharge standards.

[0049] Furthermore, when the water quality requirements are not high, such as for cooking and washing, the raw water can be directly discharged and used through the main water outlet pipe 24 after being filtered by the pre-filter 5 on the main raw water pipe 8.

[0050] Furthermore, this utility model also provides a water purifier, including the aforementioned regenerable water system. This water purifier ensures that at least one electrodialysis filter cartridge provides uninterrupted water supply to the user, guaranteeing their water demand. Moreover, the electrodialysis filter cartridge utilizes reverse electrolysis of the raw water to achieve ion desorption, and is fully regenerated through flushing with pure water in the storage tank 1. This eliminates the need for pure water produced by other electrodialysis filter cartridges, not only ensuring a sufficient supply of water for the user but also reducing the water purifier's energy consumption.

[0051] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A renewable water system, characterized in that, include: The pipeline system includes a water storage tank and at least two electrodialysis filter cartridges with ion adsorption function. Raw water can be purified by passing through any of the electrodialysis filter cartridges and then discharged. A portion of the purified water can be allocated to the water storage tank for storage. During the regeneration of the electrodialysis filter element, in the early stage of regeneration, the raw water flows back through the electrodialysis filter element that needs to be regenerated and discharges wastewater. In the later stage of regeneration, the pure water stored in the water tank flows back through the electrodialysis filter element that needs to be regenerated to rinse it. At least two of the electrodialysis filter cartridges are set in a gradient with a water production difference A, and when any of the electrodialysis filter cartridges is regenerated, at least one of the electrodialysis filter cartridges produces water to output water.

2. The renewable water system according to claim 1, characterized in that: Based on the electrodialysis filter element with the lowest water production, the water production difference A is calculated as a percentage of 20% to 50%.

3. The renewable water system according to claim 1, characterized in that: When the difference in water production is less than A, the raw water flows through the electrodialysis filter cartridge with a lower remaining water production capacity and is then discharged.

4. The renewable water system according to claim 1, characterized in that: At least two of the electrodialysis filter cartridges are connected in parallel and stacked.

5. The renewable water system according to any one of claims 1-4, characterized in that: Raw water flows forward through the raw water pipeline, passes through the electrodialysis filter element to produce water, and then exits through the outlet pipeline. Raw water flows backward through the regeneration pipeline, passes through the electrodialysis filter element, and then exits through the wastewater pipeline. Each electrodialysis filter element is connected to the water storage tank through its connected outlet pipeline.

6. The renewable water system according to claim 5, characterized in that: A power pump is installed on the pipeline between the water storage tank and the electrodialysis filter element.

7. The renewable water system according to claim 5, characterized in that: The raw water pipeline is equipped with a raw water valve, the outlet water pipeline is equipped with an outlet water valve, the regeneration pipeline is equipped with a regeneration valve, and the wastewater pipeline is equipped with a wastewater valve. The raw water valve, the outlet water valve, the regeneration valve, and the wastewater valve all include at least one of a straight-through valve, a three-way valve, and a four-way valve.

8. The renewable water system according to claim 5, characterized in that: Both the raw water pipe and the outlet water pipe are equipped with flow meters, and the raw water pipe, the outlet water pipe, and the wastewater pipe are all equipped with TDS testers.

9. The renewable water system according to claim 5, characterized in that: The raw water pipe is equipped with a pre-filter, and the raw water pipe can be directly connected to the outlet water pipe.

10. A water purifier, characterized in that, include: The renewable water system according to any one of claims 1-9.