Domestic nanofiltration water purifier water circuit

Abstract

A water circuit for a household nanofiltration water purifier belongs to the field of water purifier technology. It includes a nanofiltration filter element, a solenoid valve, a booster pump, a reverse osmosis (RO) membrane, a wastewater solenoid valve, a post-carbon filter, a high-pressure valve, and a dual-outlet faucet. The nanofiltration filter element contains hollow nanofiltration membrane fibers and has a nanofiltration inlet, a nanofiltration clean water inlet, and a nanofiltration flushing outlet. The booster pump has a booster pump inlet and a booster pump outlet. The RO membrane has an RO inlet at the top and an RO clean water inlet and an RO wastewater inlet at the bottom. The post-carbon filter has a carbon rod inlet at the top and a carbon rod outlet at the bottom. The dual-outlet faucet has a clean water interface and a flushing water interface. The wastewater solenoid valve is connected to the RO membrane. This invention reduces filter clogging and contamination, extends filter lifespan, increases the water purification rate and total purified water volume of the water purifier, and reduces the frequency of filter replacement.

Description

Technical Field

[0001] This utility model belongs to the field of water purifier technology, and in particular relates to a water circuit of a household nanofiltration water purifier. Background Technology

[0002] With families placing increasing emphasis on drinking water quality, household drinking water filters are becoming increasingly popular, and most households are starting to use water purifiers. The market offers a wide variety of water purifiers, including common types such as single-filter coarse filtration systems, ultrafiltration systems, and reverse osmosis (RO) systems. Their typical configuration includes a pre-filter (PP cotton filter), a pre-filter (carbon rod filter), a RO filter, a post-filter (carbon rod filter), a booster pump, several control valves, and a circuit board. Under current water circuit configurations, the water purification rate of these purifiers is typically only 65%, resulting in low water production and significant water waste. The total water purification capacity of the filters is also limited, usually around 8 tons, leading to high wastewater discharge and frequent filter replacements. This increases maintenance costs for users and contradicts modern environmental and energy-saving living principles. The market needs a higher-performance water purifier.

[0003] Therefore, there is an urgent need for a household nanofiltration water purifier water circuit to solve the above-mentioned technical problems.

[0004] Terms and definitions:

[0005] Water purifier water production rate: Under specified test conditions, the ratio of the total purified water volume of the water purifier to the total influent water volume after the raw water has been purified.

[0006] Total net water volume: The total net water volume obtained after the raw water has been purified. Utility Model Content

[0007] The purpose of this invention is to provide a water circuit for a household nanofiltration water purifier to solve the above-mentioned technical problems.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a water circuit for a household nanofiltration water purifier, comprising a nanofiltration filter element, a solenoid valve, a booster pump, a reverse osmosis (RO) membrane, a wastewater solenoid valve, a post-carbon rod, a high-pressure valve, and a dual-outlet faucet; the nanofiltration filter element is internally provided with hollow nanofiltration membrane fibers, and the nanofiltration filter element is provided with a nanofiltration inlet, a nanofiltration clean water outlet, and a nanofiltration flushing outlet; the booster pump is provided with a booster pump inlet and a booster pump outlet, and a solenoid valve is provided between the booster pump and the nanofiltration filter element; the top of the reverse osmosis (RO) membrane is provided with an RO inlet, and the bottom of the reverse osmosis (RO) membrane is provided with an RO membrane clean water outlet and an RO membrane wastewater outlet; the top of the post-carbon rod is provided with a carbon rod inlet, and the bottom of the post-carbon rod is provided with a carbon rod outlet; the dual-outlet faucet is provided with a clean water interface and a flushing water interface, and a high-pressure valve is provided between the dual-outlet faucet and the post-carbon rod; the wastewater solenoid valve is connected to the reverse osmosis (RO) membrane.

[0009] The booster pump, solenoid valve, wastewater solenoid valve, and high-pressure valve are connected to a circuit. The solenoid valve, wastewater solenoid valve, and high-pressure valve are all electrically controlled automatic valves, controlled by the program of the whole machine's electronic control board.

[0010] The nanofiltration filter element, solenoid valve, booster pump, reverse osmosis (RO) membrane, post-carbon filter, high-pressure valve, and dual-outlet faucet are connected via PE pipes or an integrated water circuit board to form a purified water circuit.

[0011] The nanofiltration filter element, solenoid valve, booster pump, reverse osmosis (RO) membrane, and wastewater solenoid valve are connected via PE pipes or an integrated water circuit board to form a wastewater circuit.

[0012] The nanofiltration filter element and dual-outlet faucet are connected via PE pipes or an integrated water circuit board to form a flushing water circuit.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The filter structure of this utility model includes a nanofiltration filter element, a solenoid valve, a booster pump, a reverse osmosis (RO) membrane, a post-carbon rod filter element, a high-pressure valve, and a dual-outlet faucet. In use, the equipment can achieve automatic water purification and manual flushing, and can purify the water flow.

[0015] By utilizing the forward flushing characteristics of hollow nanofiltration membrane fibers and the force of water flow, pollutants accumulated on the surface of the hollow nanofiltration membrane fibers are flushed off and discharged through the flushing port, restoring the filter element's lifespan. This solves the problem of filter element clogging caused by pollutant accumulation, thereby preventing impurities and dirt from clogging the hollow nanofiltration filter element, improving the purification efficiency of the hollow nanofiltration filter element, and achieving the goal of long-term use of the nanofiltration filter element.

[0016] By utilizing the high interception rate of hollow nanofiltration membranes, most pollutants are intercepted, effectively protecting the downstream reverse osmosis (RO) membrane. This allows the RO membrane to increase the water purification rate to 80% and effectively reduce wastewater discharge.

[0017] This invention effectively protects the downstream reverse osmosis (RO) filter cartridge by utilizing the high interception rate of the nanofiltration cartridge, extending the service life of the filter cartridge, increasing the total water purification capacity to 16 tons, reducing the frequency of filter cartridge replacement, and lowering the user's maintenance costs.

[0018] This utility model discloses a water circuit for a household nanofiltration water purifier, which reduces and minimizes filter clogging and contamination, extends filter lifespan, improves water purification rate, increases total purified water volume, and reduces the frequency of filter replacement. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the water circuit of a household nanofiltration water purifier;

[0020] Figure 2 This is a schematic diagram of a nanofiltration filter element.

[0021] In the diagram: 1. Nanofiltration filter element; 2. Nanofiltration inlet; 3. Nanofiltration purified water outlet; 4. Nanofiltration flushing outlet; 5. Solenoid valve; 6. Booster pump inlet; 7. Booster pump outlet; 8. Booster pump; 9. Reverse osmosis (RO) membrane; 10. RO inlet; 11. RO membrane purified water outlet; 12. RO membrane wastewater outlet; 13. Wastewater solenoid valve; 14. Carbon rod inlet; 15. Post-carbon rod; 16. Carbon rod outlet; 17. High-pressure valve; 18. Dual-outlet faucet; 19. Purified water interface; 20. Flushing water interface; 21. Purified water path; 22. Flushing water path; 23. Wastewater path. 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] Please see Figures 1-2 This utility model provides a technical solution: a water circuit for a household nanofiltration water purifier, including a nanofiltration filter element 1, a solenoid valve 5, a booster pump 8, a reverse osmosis (RO) membrane 9, a wastewater solenoid valve 13, a post-carbon rod 15, a high-pressure valve 17, and a dual-outlet faucet 18; the nanofiltration filter element 1 is internally provided with hollow nanofiltration membrane fibers 24, and the nanofiltration filter element 1 is provided with a nanofiltration inlet 2, a nanofiltration clean water outlet 3, and a nanofiltration flushing outlet 4; the booster pump 8 is provided with a booster pump inlet 6 and a booster pump outlet 7, and the solenoid valve 5 is provided between the booster pump 8 and the nanofiltration filter element 1. The reverse osmosis (RO) membrane 9 has an RO inlet 10 at its top and an RO clean water outlet 11 and an RO wastewater outlet 12 at its bottom. The post-carbon rod 15 has a carbon rod inlet 14 at its top and a carbon rod outlet 16 at its bottom. The dual-outlet faucet 18 has a clean water interface 19 and a flushing water interface 20, and a high-pressure valve 17 is installed between the dual-outlet faucet 18 and the post-carbon rod 15. The wastewater solenoid valve 13 is connected to the reverse osmosis (RO) membrane 9 and is used to control the discharge of wastewater.

[0024] The hollow nanofiltration membrane filaments 24 inside the nanofiltration filter element 1 can be used to efficiently filter pollutants such as silt, rust, colloids, insect eggs, algae, and heavy metals in water.

[0025] The nanofiltration inlet 2 and nanofiltration purified water inlet 3 are respectively provided at the upper and lower ends of the nanofiltration filter element 1. The nanofiltration flushing port 4 is provided on the side of the nanofiltration filter element 1. The nanofiltration purified water inlet 3 is connected to the booster pump inlet 6. The solenoid valve 5 is located between the nanofiltration purified water inlet 3 and the booster pump inlet 6. Water flows through the nanofiltration inlet 2 into the hollow nanofiltration membrane fiber 24, purified water flows out through the nanofiltration purified water inlet 3, and flushing water flows out through the nanofiltration flushing port 4.

[0026] The booster pump outlet 7 and the RO inlet 10 are connected. The water that is boosted by the booster pump 8 flows out through the booster pump outlet 7 to the RO inlet 10 and then into the reverse osmosis RO membrane 9.

[0027] The booster pump 8 is located at the front end of the reverse osmosis (RO) membrane 9, so that the water flow after being pressurized by the RO membrane 9 can effectively flush out the pollutants in the RO membrane 9 and discharge them through the RO membrane wastewater outlet 12, thereby extending the life of the reverse osmosis (RO) membrane 9.

[0028] The RO membrane clean water inlet 11 and RO membrane waste water inlet 12 are respectively located at the bottom center and bottom side of the reverse osmosis RO membrane 9; the RO membrane clean water inlet 11 is connected to the RO membrane clean water inlet 12, and the RO membrane waste water inlet 12 is connected to the waste water solenoid valve 13. Water flows in through the RO inlet 10, is discharged through the RO membrane clean water inlet 11 to the post-carbon rod 15, and the wastewater filtered by the reverse osmosis RO membrane 9 is discharged through the RO membrane waste water inlet 12 to the waste water solenoid valve 13.

[0029] The carbon rod outlet 16 is connected to the water purification interface 19. A high-pressure valve 17 is provided between the carbon rod outlet 16 and the water purification interface 19. After the purified water is discharged from the carbon rod outlet 16, the carbon rod 15 flows through the high-pressure valve 17 to the water purification interface 19 and then flows out to the dual-outlet faucet 18 for use.

[0030] Furthermore, the high-pressure valve 17 is located at the front end of the dual-outlet faucet 18, which can control the flow rate of purified water, ensure the stable operation of the system, and make the flow rate of purified water flowing out of the dual-outlet faucet 18 stable.

[0031] Furthermore, the booster pump 8, solenoid valve 5, wastewater solenoid valve 13, and high-pressure valve 17 are connected to a circuit. Solenoid valve 5, wastewater solenoid valve 13, and high-pressure valve 17 are all electrically controlled automatic valves, controlled by the whole machine's electronic control board program.

[0032] The wastewater solenoid valve 13 has a knob adjustment, which can adjust the wastewater ratio.

[0033] The nanofiltration filter element 1, solenoid valve 5, booster pump 8, reverse osmosis (RO) membrane 9, post-carbon rod 15, high-pressure valve 17, and dual-outlet faucet 18 are connected by PE pipes or by an integrated water circuit board to form a purified water circuit 21.

[0034] The nanofiltration filter element 1, solenoid valve 5, booster pump 8, reverse osmosis (RO) membrane 9, and wastewater solenoid valve 13 are connected via PE pipes or an integrated water circuit board to form a wastewater circuit 23. The wastewater solenoid valve 13 is used to control wastewater discharge and reduce water waste.

[0035] The nanofiltration filter element 1 and the dual-outlet faucet 18 are connected by PE pipes or by an integrated water circuit board to form a flushing water circuit 22.

[0036] Furthermore, the nanofiltration filter element 1 of this utility model can adopt the application number: 202420275090.4, patent name: a filter element structure with forward flushing function; or other filter element structures that conform to this utility model can be adopted.

[0037] In this embodiment, under purified water conditions, the flushing water inlet 20 is closed and the purified water inlet 19 is open. Tap water flows into the nanofiltration filter element 1 through the nanofiltration inlet 2. Because the flushing water inlet 20 is closed, the water cannot pass through the bottom nanofiltration flushing port 4. The water flows through the side wall of the hollow nanofiltration membrane filament 24 to form filtration, and the purified water is discharged from the nanofiltration purified water port 3.

[0038] Furthermore, the solenoid valve 5 is opened, and the water flows through the solenoid valve 5 and enters the booster pump inlet 6. The booster pump 8 pressurizes the purified water and discharges it from the booster pump outlet 7.

[0039] Furthermore, the purified water enters the reverse osmosis RO membrane 9 through the RO membrane inlet 10, and the reverse osmosis RO membrane 9 filters the purified water again, and the produced water is discharged through the RO membrane purified water outlet 11.

[0040] Furthermore, the RO membrane water inlet 11 is connected to the carbon rod inlet 14, and the purified water enters the post-carbon rod 15 for further filtration. The purified water is discharged from the carbon rod outlet 16 and enters the high-pressure valve 17, which is connected to the purified water interface 19 of the dual-outlet faucet 18, ultimately providing purified water for customer use.

[0041] The RO membrane wastewater outlet 12 of the reverse osmosis RO membrane 9 is connected to the wastewater solenoid valve 13, and the high-concentration wastewater left after filtration is discharged into the sewage pipe through the wastewater solenoid valve 13.

[0042] Furthermore, the reverse osmosis (RO) membrane 9 can further filter out tiny particles and harmful substances in the water, thereby improving the water purification rate.

[0043] Furthermore, the post-carbon rod 15 is used to further adsorb odors and residual chlorine in the water, thereby improving the taste of the effluent.

[0044] In this embodiment, during automatic shutdown, both the flushing water inlet 20 and the purified water inlet 19 are closed. Water flow is unobstructed, creating high pressure within the pipes. Upon detecting this high pressure, the high-pressure valve 17 sends a stop command to the connected solenoid valve 5 and booster pump 8, causing the solenoid valve 5 to close and the booster pump 8 to stop operating. The water purifier then automatically stops.

[0045] In this embodiment, during manual rinsing, the rinsing water inlet 20 is open and the purified water inlet 19 is closed. Water flows into the nanofiltration filter element 1 through the nanofiltration inlet 2. Because the purified water inlet 19 is closed, the water cannot pass through the nanofiltration purified water inlet 3. The water flows through the surface of the hollow nanofiltration membrane filaments 24 and carries away the pollutants accumulated on the surface. The rinsing water is discharged from the nanofiltration rinsing port 4 and finally discharged through the rinsing water inlet 20 of the dual-outlet faucet 18.

[0046] During use, the opening and closing of the valve is controlled by the circuit program to realize automatic water production, automatic stop and manual flushing. Utilizing the characteristic that the hollow nanofiltration membrane filaments 24 can be backwashed, the force of the water flow carries away the contaminants on the surface of the hollow nanofiltration membrane filaments 24, restoring the filter element's lifespan and achieving the goal of long-term use of the filter element.

[0047] Furthermore, utilizing the high interception rate of nanofiltration filter element 1, most pollutants are intercepted, effectively protecting the downstream reverse osmosis (RO) membrane 9. This allows the RO membrane 9 to increase its water purification yield to 80%, effectively reducing wastewater discharge. Simultaneously, the reduced fouling of the RO membrane 9 increases its total purified water capacity to 16 tons. This achieves the goal of long-term use of the RO membrane filter element, reducing the frequency of filter element replacement for customers.

[0048] The water system of this utility model is suitable for household use and can be installed under the dishwasher.

[0049] Furthermore, in the water circuit of this invention, the nanofiltration cartridge 1 is positioned at the very front of the water circuit. Utilizing the forward flushing characteristic, the nanofiltration cartridge 1 is flushed after a period of use, ensuring the filtration effect of the entire water circuit. When used in conjunction with the reverse osmosis (RO) membrane 9 and the post-carbon filter 15, tap water can be purified into drinking water, which is very convenient for household use.

[0050] 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 water circuit for a household nanofiltration water purifier, characterized in that, The system includes a nanofiltration filter element (1), a solenoid valve (5), a booster pump (8), a reverse osmosis (RO) membrane (9), a wastewater solenoid valve (13), a post-carbon rod (15), a high-pressure valve (17), and a dual-outlet faucet (18). The nanofiltration filter element (1) is internally equipped with hollow nanofiltration membrane fibers (24), and has a nanofiltration inlet (2), a nanofiltration clean water outlet (3), and a nanofiltration flushing outlet (4). The booster pump (8) has a booster pump inlet (6) and a booster pump outlet (7), and a solenoid valve (5) is located between the booster pump (8) and the nanofiltration filter element (1). The reverse osmosis... The top of the RO membrane (9) is provided with an RO inlet (10), and the bottom of the reverse osmosis RO membrane (9) is provided with an RO membrane clean water outlet (11) and an RO membrane wastewater outlet (12); the top of the post-carbon rod (15) is provided with a carbon rod inlet (14), and the bottom of the post-carbon rod (15) is provided with a carbon rod outlet (16); the dual-outlet faucet (18) is provided with a clean water interface (19) and a flushing water interface (20), and a high-pressure valve (17) is provided between the dual-outlet faucet (18) and the post-carbon rod (15); the wastewater solenoid valve (13) is connected to the reverse osmosis RO membrane (9).

2. The water circuit of a household nanofiltration water purifier according to claim 1, characterized in that: The booster pump (8), solenoid valve (5), wastewater solenoid valve (13), and high-pressure valve (17) are connected to a circuit. Solenoid valve (5), wastewater solenoid valve (13), and high-pressure valve (17) are all electrically controlled automatic valves, which are controlled by the whole machine electronic control board program.

3. The water circuit of a household nanofiltration water purifier according to claim 1, characterized in that: The nanofiltration filter element (1), solenoid valve (5), booster pump (8), reverse osmosis membrane (9), post-carbon rod (15), high-pressure valve (17), and dual-outlet faucet (18) are connected by PE pipes or by an integrated water circuit board to form a purified water circuit (21).

4. The water circuit of a household nanofiltration water purifier according to claim 1, characterized in that: The nanofiltration filter element (1), solenoid valve (5), booster pump (8), reverse osmosis (RO) membrane (9), and wastewater solenoid valve (13) are connected by PE pipes or by an integrated water circuit board to form a wastewater circuit (23).

5. The water circuit of a household nanofiltration water purifier according to claim 1, characterized in that: The nanofiltration filter element (1) and the dual-outlet faucet (18) are connected by PE pipes or by an integrated water circuit board to form a flushing water circuit (22).

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