Single-membrane hollow nanofiltration water purifier with automatic forward flushing, backwashing and pollution discharge functions
By introducing automatic forward and backwashing functions and an intelligent control system into the water purifier, the problem of filter clogging is solved, the filter life is extended, maintenance costs are reduced, and the continuous cleanliness and safety of water quality are ensured, achieving a highly efficient water purification effect.
Patent Information
- Application Number
- CN202520435789.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-13
AI Technical Summary
Traditional water purifier filters are easily clogged by impurities in the water, leading to decreased filtration efficiency and reduced water output. Frequent filter replacements increase user costs and maintenance burdens, making it difficult to guarantee the continuous cleanliness of the water.
Design a single-membrane hollow nanofiltration water purifier with automatic forward flushing and backwashing functions. Through an intelligent control system including a normally open inlet solenoid valve, normally closed front and rear drain valves, and inlet and purified water pressure switches, the filter element can be automatically cleaned and backwashed. Combined with high-quality activated carbon and ultraviolet sterilization modules, it can achieve deep purification.
It effectively extends the service life of filter cartridges, reduces user maintenance costs, ensures the continuous cleanliness and safety of water, and provides stable and safe drinking water.
Smart Images
Figure CN223921267U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to water purifier technical field, concretely is a single membrane hollow nanofiltration water purifier with automatic order flush backwash sewage function. BACKGROUND
[0002] Water purifier is a kind of domestic or commercial equipment for purifying water quality, removes impurities, harmful substances and peculiar smell in water through multistage filtration system, to provide safe, clean, good taste drinking water, meet the needs of user daily drinking, cooking and domestic water.
[0003] In the existing water purifier technology, the plugging problem of filter core is always the key factor influencing equipment performance and service life, and in the long-term use process of traditional water purifier, filter core is easy to be plugged by impurities in water, which not only will lead to the decline of filtration efficiency, but also will make the water output reduce, and water quality is poor, in addition, frequent replacement of filter core not only increases the use cost of user, but also brings the user larger maintenance burden, and this filter core plugging problem limits the long-term stable operation of traditional water purifier to some extent, and it is difficult to guarantee the continuous cleaning of water quality, therefore, a single membrane hollow nanofiltration water purifier with automatic order flush backwash sewage function is provided for the above problems. CONTENT OF UTILITY MODEL
[0004] The utility model aims at providing a single membrane hollow nanofiltration water purifier with automatic order flush backwash sewage function, to solve the problem that in the long-term use process of traditional water purifier, filter core is easy to be plugged by impurities in water, which not only will lead to the decline of filtration efficiency, but also will make the water output reduce, and water quality is poor, in addition, frequent replacement of filter core not only increases the use cost of user, but also brings the user larger maintenance burden, and this filter core plugging problem limits the long-term stable operation of traditional water purifier to some extent, and it is difficult to guarantee the continuous cleaning of water quality.
[0005] To realize the above-mentioned purpose, the utility model provides the following technical scheme:
[0006] The utility model provides a single membrane hollow nanofiltration purifier with automatic forward flush backwash blowdown function, including PP cotton, hollow nanofiltration membrane, pressure water storage bucket, post carbon and first pipeline, first communicating pipe is fixedly connected to the upper end of PP cotton, the one side of first communicating pipe is fixedly connected with water inlet pressure switch, the one side of water inlet pressure switch is fixedly connected with diaphragm booster pump through connecting pipe, the water outlet of diaphragm booster pump is fixedly connected with second communicating pipe, the inner side of second communicating pipe is fixedly connected with normally open water inlet electromagnetic valve, second communicating pipe is fixedly connected with blowdown pipe, the inner side of blowdown pipe is fixedly connected with normally closed front blowdown valve, the one side of blowdown pipe is fixedly connected with normally closed end blowdown valve, the one side of hollow nanofiltration membrane is fixedly connected with second pipeline, the one side of blowdown pipe close to normally closed end blowdown valve is fixedly connected with bifurcated pipe, the inner side of bifurcated pipe is fixedly connected with purifying water pressure switch, the upper end of pressure water storage bucket is fixedly connected with third pipeline, the one side of third pipeline is fixedly connected with check valve, the one side of check valve is fixedly connected with direct drinking water connecting pipe, the outer side of direct drinking water connecting pipe is fixedly connected with on-line ultraviolet sterilization module.
[0007] As the further optimization of the utility model, the bottom end of the PP cotton is provided with a water inlet, the bottom end of the PP cotton is fixedly connected with a water inlet connecting pipe at the top end, the inner side of the PP cotton is communicated with the inner side of the water inlet connecting pipe through the water inlet, and the inner side of the PP cotton is communicated with the inner side of the first communicating pipe.
[0008] As the further optimization of the utility model, one end of the first communicating pipe is communicated with the water inlet of the diaphragm booster pump, one end of the second communicating pipe is communicated with the water outlet of the diaphragm booster pump, and the inner side of the second communicating pipe, the inner side of the first pipeline and the inner side of the blowdown pipe are communicated.
[0009] As the further optimization of the utility model, the inner side of the blowdown pipe is communicated with the inner side of the bifurcated pipe, the upper end of the hollow nanofiltration membrane close to the bifurcated pipe is provided with a through hole, the inner side of the hollow nanofiltration membrane is communicated with the inner side of the bifurcated pipe through the through hole, the inner side of the hollow nanofiltration membrane close to the second pipeline is provided with a through hole, the inner side of the hollow nanofiltration membrane is communicated with the inner side of the second pipeline through the through hole, and the right end of the blowdown pipe is a through structure.
[0010] As the further optimization of the utility model, one end of the first pipeline is fixedly connected with the bottom end of the hollow nanofiltration membrane, the inner side of the hollow nanofiltration membrane close to the first pipeline is provided with a through hole, and the bottom end of the hollow nanofiltration membrane is communicated with the inner side of the first pipeline through the through hole.
[0011] As a further optimization of this utility model, the second pipe is fixedly connected to one side of the third pipe, the inner side of the second pipe is connected to the inner side of the third pipe, one end of the third pipe is fixedly connected to the top of the pressure storage tank, and the pressure storage tank has a through hole near the upper end of the third pipe, and the pressure storage tank is connected to the inner side of the third pipe through the through hole.
[0012] As a further optimization of this utility model, the third pipe is fixedly connected to a post-carbon filter on one side, and the post-carbon filter has through holes at both its upper and lower ends. The inner side of the third pipe, the inner side of the post-carbon filter, and the inner side of the direct drinking water connection pipe are connected, and one end of the direct drinking water connection pipe is a through structure.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] This invention effectively solves the problems of easy clogging and frequent replacement of filter cartridges in traditional water purifiers by incorporating a normally open inlet solenoid valve, a normally closed front drain valve, a normally closed end drain valve, an inlet pressure switch, and a purified water pressure switch. Its intelligent control system can precisely control the working state of each solenoid valve based on preset programs and sensor feedback data, enabling forward flushing and backwashing operations. This maintains good permeability of the membrane module, extends the filter cartridge's lifespan, and reduces user operating costs and maintenance burden. Furthermore, the water purifier uses high-quality activated carbon and an ultraviolet sterilization module for deep purification and sterilization, ensuring continuous water cleanliness and safety. It provides users with stable, safe, and clean drinking water, demonstrating significant economic and social benefits and promising broad market application prospects. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a cross-sectional view of the overall structure of this utility model;
[0017] Figure 3 This utility model Figure 2 A schematic diagram of the structure at point A;
[0018] Figure 4 This utility model Figure 2 A schematic diagram of the structure at point B;
[0019] Figure 5 This utility model Figure 2 A schematic diagram of the structure at point C;
[0020] Figure 6 This utility model Figure 2 A schematic diagram of the structure at point D.
[0021] In the diagram: 1. Normally open inlet solenoid valve; 2. Normally closed front drain valve; 3. Normally closed end drain valve; 4. Inlet pressure switch; 5. Purified water pressure switch; 6. Check valve; 7. Online ultraviolet sterilization module; 8. PP cotton; 9. Diaphragm booster pump; 10. Pressure storage tank; 11. Hollow fiber nanofiltration membrane; 12. Post-carbon filter; 13. First pipe; 14. Drain pipe; 15. Branch pipe; 16. Second pipe; 17. Third pipe; 18. Direct drinking water connection pipe; 19. First connecting pipe; 20. Second connecting pipe; 21. Inlet connection pipe. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0024] Please see Figures 1-6 This utility model provides a technical solution:
[0025] A single-membrane hollow nanofiltration water purifier with automatic forward flushing, backwashing, and sewage discharge functions includes PP cotton 8, hollow nanofiltration membrane 11, pressure storage tank 10, post-carbon filter 12, and a first pipe 13. A first connecting pipe 19 is fixedly connected to the upper end of the PP cotton 8. An inlet pressure switch 4 is fixedly connected to one side of the first connecting pipe 19. A diaphragm booster pump 9 is fixedly connected to one side of the inlet pressure switch 4 via a connecting pipe. The outlet of the diaphragm booster pump 9 is fixedly connected to a second connecting pipe 20. A normally open inlet solenoid valve 1 is fixedly connected to the inside of the second connecting pipe 20. A sewage discharge pipe 14 is fixedly connected to the second connecting pipe 20 for sewage discharge. A normally closed front drain valve 2 is fixedly connected to the inside of the drain pipe 14. A normally closed end drain valve 3 is fixedly connected to one side of the drain pipe 14. A second pipe 16 is fixedly connected to one side of the hollow nanofiltration membrane 11. A branch pipe 15 is fixedly connected to the side of the drain pipe 14 near the normally closed end drain valve 3. A water purification pressure switch 5 is fixedly connected to the inside of the branch pipe 15. A third pipe 17 is fixedly connected to the upper end of the pressure storage tank 10. A one-way valve 6 is fixedly connected to one side of the third pipe 17. A direct drinking water connection pipe 18 is fixedly connected to one side of the one-way valve 6. An online ultraviolet sterilization module 7 is fixedly connected to the outside of the direct drinking water connection pipe 18.
[0026] As a further implementation of this solution, the bottom of the PP cotton 8 is provided with a water inlet. The bottom of the PP cotton 8 is fixedly connected to the top of the water inlet connecting pipe 21. The inside of the PP cotton 8 is connected to the inside of the water inlet connecting pipe 21 through the water inlet. The inside of the PP cotton 8 is also connected to the inside of the first connecting pipe 19. Through the above settings, the water inlet and the connection design ensure that the water can flow smoothly from the water inlet connecting pipe 21 into the PP cotton 8, reducing water flow resistance and improving filtration efficiency.
[0027] As a further implementation of this solution, one end of the first connecting pipe 19 is connected to the inlet of the diaphragm booster pump 9, and one end of the second connecting pipe 20 is connected to the outlet of the diaphragm booster pump 9. The inner side of the second connecting pipe 20, the inner side of the first pipe 13, and the inner side of the drain pipe 14 are connected. Through the above settings, it is ensured that the water flow can enter and leave the diaphragm booster pump 9 efficiently. At the same time, the connection design with the first pipe 13 and the drain pipe 14 optimizes the water flow path and reduces water flow dead zones.
[0028] As a further implementation of this scheme, the inner side of the drain pipe 14 is connected to the inner side of the branch pipe 15. The hollow nanofiltration membrane 11 has a through hole at the upper end near the branch pipe 15, and the inner side of the hollow nanofiltration membrane 11 is connected to the inner side of the branch pipe 15 through the through hole. The inner side of the hollow nanofiltration membrane 11 is also connected to the inner side of the second pipe 16 through the through hole. The right end of the drain pipe 14 is a through structure. Through the above settings, the multi-point connection design of the branch pipe 15 and the second pipe 16 ensures that the water flow can flow flexibly in different parts of the hollow nanofiltration membrane 11, optimizes the sewage discharge efficiency, and reduces the accumulation of impurities.
[0029] As a further implementation of this solution, one end of the first pipe 13 is fixedly connected to the bottom end of the hollow nanofiltration membrane 11. The hollow nanofiltration membrane 11 has a through hole on its inner side near the first pipe 13. The lower end of the hollow nanofiltration membrane 11 is connected to the inner side of the first pipe 13 through the through hole. Through the above arrangement, the fixed connection and through hole design ensure that the water flow can stably enter the hollow nanofiltration membrane 11 from the first pipe 13, reduce water flow resistance, and improve filtration efficiency.
[0030] As a further implementation of this solution, one side of the second pipe 16 is fixedly connected to one side of the third pipe 17, the inner side of the second pipe 16 is connected to the inner side of the third pipe 17, one end of the third pipe 17 is fixedly connected to the top of the pressure storage tank 10, and the pressure storage tank 10 has a through hole near the upper end of the third pipe 17. The pressure storage tank 10 is connected to the inner side of the third pipe 17 through the through hole. With the above settings, the design of the pressure storage tank 10 can stabilize the water supply pressure and ensure stable water supply for users under different water demand conditions.
[0031] As a further implementation of this solution, a post-carbon filter 12 is fixedly connected to one side of the third pipe 17. The post-carbon filter 12 has through holes at both the upper and lower ends. The inner side of the third pipe 17, the inner side of the post-carbon filter 12, and the inner side of the drinking water connection pipe 18 are connected. One end of the drinking water connection pipe 18 is a through structure. Through the above settings, the post-carbon filter 12, with its strong adsorption capacity, further removes residual harmful substances in the water, improves the quality and safety of the water. The reasonable connection design reduces the residence time of water in the pipe, reduces the possibility of impurity deposition, and extends the service life of the filter element.
[0032] Work process;
[0033] I. Initial State and Normal Operation
[0034] In the initial state, the normally open inlet solenoid valve 1 is in the open state, and the normally closed front drain valve 2 and normally closed end drain valve 3 are in the closed state. The raw water first passes through the pre-filter PP cotton 8 for preliminary filtration to remove large particulate impurities in the water, such as silt and rust. The filtered water enters the diaphragm booster pump 9. Through the action of the booster pump, a stable and suitable water pressure is provided to the hollow nanofiltration membrane 11 to ensure the efficient operation of the filtration process. The pressurized water is transported to the hollow nanofiltration membrane 11 for deep filtration, removing dissolved impurities, heavy metals, bacteria and other harmful substances from the water. The filtered water is then distributed in two streams: one stream flows into the pressure storage tank 10 for storage, and the other stream flows to the post-activated carbon filter 12 for further purification. The activated carbon, through its strong adsorption capacity, further removes residual antibiotics, volatile organic compounds (VOCs) and other harmful substances from the water, deeply purifying the water quality and improving its safety. Finally, the water treated by the activated carbon enters the online ultraviolet sterilization module 7 for sterilization, killing any bacteria, viruses and other microorganisms that may remain in the water, ensuring that the drinking water fully meets hygiene standards and protecting the health of users.
[0035] II. Forward flushing operation
[0036] After the water purifier has been running for a period of time, the Jingzhijie automatic control system determines when forward flushing is needed based on preset time intervals or by monitoring parameters such as membrane module pressure difference. It automatically opens the normally closed end drain valve 3 at the rear end. At this time, under the pressure of the diaphragm booster pump 9, the water flow washes the hollow nanofiltration membrane 11 in the forward direction, and discharges some of the impurities trapped on the membrane surface through the normally closed end drain valve 3. The forward flushing operation can effectively remove impurities accumulated on the membrane surface, maintain the basic cleanliness of the membrane module, prevent membrane pore blockage, and extend the service life of the filter element. After flushing for a certain period of time, the system automatically closes the normally closed end drain valve 3 at the rear end, and the water purifier returns to normal working status.
[0037] III. End-of-line backwashing operation
[0038] When backwashing is required, the Jingzhijie automatic control system first closes the normally open inlet solenoid valve 1 and simultaneously opens the normally closed end drain valve 3, causing the water in the membrane module to flow in reverse. This backwashes the end of the hollow nanofiltration membrane 11 and the pipeline connected to the end. The backwashing operation can effectively remove impurities that may accumulate at the end, prevent blockage, and ensure the long-term stable operation of the membrane module. After backwashing for a period of time, the system reopens the normally open inlet solenoid valve 1, using the water flow to completely flush out the harmful substances generated during backwashing from the membrane module. Finally, the normally closed end drain valve 3 is closed to complete the end backwashing operation, and the water purifier returns to normal operation.
[0039] IV. Front-end backwashing operation
[0040] When the system detects that the front end of the hollow nanofiltration membrane 11 needs to be cleaned, the Jingzhijie automatic control system closes the normally open inlet solenoid valve 1 and opens the normally closed front drain valve 2 for backwashing. The raw water flows back into the front end of the hollow nanofiltration membrane 11 under the action of the diaphragm booster pump 9 to rinse it and remove the impurities trapped at the front end. The front backwashing operation can effectively clean the front end of the membrane module, maintain good filtration performance, and ensure the continuous cleanliness of the water. After rinsing, the system opens the normally open inlet solenoid valve 1 and closes the normally closed front drain valve 2 for backwashing, and the water purifier resumes normal filtration operation.
[0041] V. One-way bypass waterway
[0042] To address the potential air pressure issue caused by water flowing into the membrane module after cleaning, a one-way bypass water path is installed after the rear drain outlet and the inlet solenoid valve. This one-way bypass water path effectively prevents air from entering the membrane module, avoiding damage caused by air pressure and ensuring stable operation of the equipment.
[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A single-membrane hollow nanofiltration water purifier with automatic forward flushing and backwashing function, comprising PP cotton (8), hollow nanofiltration membrane (11), pressure storage tank (10), post-carbon filter (12), and first pipe (13), characterized in that: The upper end of the PP cotton (8) is fixedly connected to a first connecting pipe (19). A water inlet pressure switch (4) is fixedly connected to one side of the first connecting pipe (19). A diaphragm booster pump (9) is fixedly connected to one side of the water inlet pressure switch (4) via a connecting pipe. The outlet of the diaphragm booster pump (9) is fixedly connected to a second connecting pipe (20). A normally open water inlet solenoid valve (1) is fixedly connected to the inside of the second connecting pipe (20). A drain pipe (14) is fixedly connected to the second connecting pipe (20). A normally closed front drain valve (2) is fixedly connected to the inside of the drain pipe (14). A drain valve (2) is fixedly connected to one side of the drain pipe (14). The normally closed end drain valve (3) is connected to a second pipe (16) on one side of the hollow nanofiltration membrane (11). The drain pipe (14) is connected to a branch pipe (15) on the side near the normally closed end drain valve (3). A water pressure switch (5) is connected to the inside of the branch pipe (15). A third pipe (17) is connected to the upper end of the pressure storage tank (10). A one-way valve (6) is connected to one side of the third pipe (17). A drinking water connection pipe (18) is connected to one side of the one-way valve (6). An online ultraviolet sterilization module (7) is connected to the outside of the drinking water connection pipe (18).
2. A single-membrane hollow nanofiltration water purifier with automatic forward flushing and backwashing function as described in claim 1, characterized in that: The bottom end of the PP cotton (8) is provided with a water inlet. The bottom end of the PP cotton (8) is fixedly connected to the top end of the water inlet connecting pipe (21). The inner side of the PP cotton (8) is connected to the inner side of the water inlet connecting pipe (21) through the water inlet. The inner side of the PP cotton (8) is connected to the inner side of the first connecting pipe (19).
3. A single-membrane hollow nanofiltration water purifier with automatic forward flushing and backwashing function as described in claim 1, characterized in that: One end of the first connecting pipe (19) is connected to the inlet of the diaphragm booster pump (9), and one end of the second connecting pipe (20) is connected to the outlet of the diaphragm booster pump (9). The inner side of the second connecting pipe (20), the inner side of the first pipe (13), and the inner side of the sewage pipe (14) are connected.
4. A single-membrane hollow nanofiltration water purifier with automatic forward flushing and backwashing function as described in claim 1, characterized in that: The inside of the drain pipe (14) is connected to the inside of the branch pipe (15). The hollow nanofiltration membrane (11) has a through hole at the upper end near the branch pipe (15). The inside of the hollow nanofiltration membrane (11) is connected to the inside of the branch pipe (15) through the through hole. The inside of the hollow nanofiltration membrane (11) is connected to the inside of the second pipe (16) through the through hole. The right end of the drain pipe (14) is a through structure.
5. A single-membrane hollow nanofiltration water purifier with automatic forward flushing and backwashing function as described in claim 1, characterized in that: One end of the first pipe (13) is fixedly connected to the bottom end of the hollow nanofiltration membrane (11). The hollow nanofiltration membrane (11) has a through hole on the inner side near the first pipe (13). The lower end of the hollow nanofiltration membrane (11) is connected to the inner side of the first pipe (13) through the through hole.
6. A single-membrane hollow nanofiltration water purifier with automatic forward flushing and backwashing function as described in claim 1, characterized in that: One side of the second pipe (16) is fixedly connected to one side of the third pipe (17), the inner side of the second pipe (16) is connected to the inner side of the third pipe (17), one end of the third pipe (17) is fixedly connected to the top of the pressure storage tank (10), the pressure storage tank (10) has a through hole at the upper end near the third pipe (17), and the pressure storage tank (10) is connected to the inner side of the third pipe (17) through the through hole.
7. A single-membrane hollow nanofiltration water purifier with automatic forward flushing and backwashing function as described in claim 1, characterized in that: A post-carbon filter (12) is fixedly connected to one side of the third pipe (17). The post-carbon filter (12) has through holes at both the upper and lower ends. The inner side of the third pipe (17), the inner side of the post-carbon filter (12), and the inner side of the direct drinking water connection pipe (18) are connected. One end of the direct drinking water connection pipe (18) is a through structure.