A direct drinking water pipeline equipment

Abstract

The application relates to the technical field of water purification, and discloses a pipeline direct drinking water equipment, which comprises, in sequence, a raw water tank, a bacteriostatic PVDF inner pressure type ultrafiltration membrane group, a bacteriostatic carbon fiber filter group, an RO membrane group and a pure water tank; the raw water tank is provided with a first electric conductivity instrument, a first water inlet and a first water outlet; the pipeline direct drinking water equipment further comprises a concentrated water tank provided with a sixth water inlet and a sixth water outlet. The pipeline direct drinking water equipment of the application realizes effective recovery of RO membrane concentrated water, improves the utilization rate of water resources and reduces the water purification cost under the premise of guaranteeing the quality of direct drinking water.

Description

Technical Field

[0001] This application relates to the field of water purification technology, and mainly to a piped direct drinking water device. Background Technology

[0002] Since its introduction in China in 1997, piped drinking water has developed rapidly, especially in economically developed regions. As a supporting facility for drinking water in residential communities, piped drinking water has a promising future and can replace bottled water and small household water purifiers, becoming a major player in the residential and office drinking water market.

[0003] The safety of using reverse osmosis (RO) membranes for water purification is widely recognized; therefore, RO membranes are frequently used in water purification systems. RO membranes utilize the principle of reverse osmosis for water treatment. Under certain pressure, water molecules can pass through the RO membrane, while impurities such as inorganic salts, heavy metal ions, organic matter, colloids, bacteria, and viruses cannot. This allows some water to pass through the RO membrane, while the unfiltered water, due to the increased solute concentration, forms concentrated water. Typically, the purified water / wastewater ratio of a low-gallon RO membrane is 1:3, meaning that after one purification and filtration cycle, the concentrated water is approximately three times the volume of purified water. Currently, piped drinking water systems using RO membrane filtration directly discharge this concentrated water. However, the raw water for these systems is safe and qualified municipal tap water, and the quality of the concentrated water produced after one purification and filtration cycle is no worse than the raw water. Discharging this concentrated water directly as wastewater not only increases water purification costs but also wastes water resources.

[0004] Therefore, existing technologies still need to be improved and developed. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a piped drinking water device, which aims to improve the utilization rate of water resources.

[0006] The technical solution of this application is as follows:

[0007] A piped drinking water device includes, in sequence, a raw water tank, an antibacterial PVDF internal pressure ultrafiltration membrane module, an antibacterial carbon fiber filter module, an RO membrane module, and a pure water tank.

[0008] The raw water tank is equipped with a first conductivity meter, a first inlet and a first outlet;

[0009] The antibacterial PVDF internal pressure ultrafiltration membrane module is provided with at least one antibacterial PVDF internal pressure ultrafiltration membrane filter, and each of the antibacterial PVDF internal pressure ultrafiltration membrane filters is provided with a second inlet and a second outlet.

[0010] The antibacterial carbon fiber filter assembly is provided with at least one antibacterial carbon fiber filter, and each antibacterial carbon fiber filter is provided with a third water inlet and a third water outlet.

[0011] The RO membrane module is equipped with at least one RO membrane filter, and each RO membrane filter is equipped with a fourth inlet, a fourth outlet and a concentrate outlet.

[0012] The pure water tank is equipped with a fifth inlet and a fifth outlet;

[0013] The piped drinking water equipment also includes a concentrated water tank, which is equipped with a sixth inlet and a sixth outlet.

[0014] The first water inlet is connected to the municipal tap water pipeline, the sixth water outlet, and the concentrated water outlet respectively; a first solenoid valve is installed on the pipeline between the first water inlet and the sixth water outlet; a second solenoid valve is installed on the pipeline between the first water inlet and the concentrated water outlet; and a tenth solenoid valve is installed on the pipeline between the first water inlet and the municipal tap water pipeline.

[0015] The sixth water inlet is connected to the concentrated water outlet; a third solenoid valve is installed on the pipe between the sixth water inlet and the concentrated water outlet;

[0016] The first outlet is connected to the second inlet;

[0017] The second outlet is connected to the third inlet;

[0018] The third outlet is connected to the fourth inlet;

[0019] The fourth outlet is connected to the fifth inlet;

[0020] The fifth water outlet is connected to the point of use.

[0021] The RO membrane module generates concentrated water that is directly returned to the raw water tank for recycling. When the conductivity of the raw water exceeds the preset value as monitored by the first conductivity meter in the raw water tank, the second solenoid valve closes, and the first and third solenoid valves open, allowing the concentrated water to flow into the concentrated water tank for storage. The concentrated water is then mixed with municipal tap water in a preset ratio before entering the raw water tank. When the conductivity of the raw water in the raw water tank returns to the preset value, the second solenoid valve opens, and the first and third solenoid valves close.

[0022] The aforementioned piped direct drinking water equipment includes a high-pressure pump and a membrane pressure sensor sequentially installed along the water flow direction on the pipe between the antibacterial carbon fiber filter assembly and the RO membrane assembly; and a concentrate flow regulating valve and a concentrate flow meter sequentially installed along the water flow direction on the pipe between the sixth inlet and the concentrate outlet.

[0023] A first water flow regulating valve and a first glass float flow meter are sequentially installed along the water flow direction on the pipeline between the pre-membrane pressure sensor and the fourth inlet of each RO membrane filter.

[0024] Adjustments are made using a combination of a pre-membrane pressure sensor, a concentrate flow regulating valve, and a first flow regulating valve. During adjustments, operators can visually monitor the flow rate consistency using a first glass float flow meter, facilitating adjustments. This ensures consistent flow rates before the fourth inlet of each RO membrane filter, achieving constant flow supply before the membrane. When the concentrate flow meter reaches the preset flow rate, all RO membrane filters can be replaced simultaneously, maximizing the utilization of each filter.

[0025] In the aforementioned piped drinking water equipment, an ultrafiltration membrane pressure sensor and an ultrafiltration membrane flow meter are sequentially installed along the water flow direction on the pipeline between the raw water tank and the antibacterial PVDF internal pressure ultrafiltration membrane module; a second water flow regulating valve and a second glass float flow meter are sequentially installed along the water flow direction before the second inlet of each antibacterial PVDF internal pressure ultrafiltration membrane filter.

[0026] The antibacterial PVDF internal pressure ultrafiltration membrane module is also equipped with a constant flow water supply, which allows for unified replacement and maximizes the utilization of each antibacterial PVDF internal pressure ultrafiltration membrane filter. When the flow meter before the ultrafiltration membrane reaches the preset flow rate, all antibacterial PVDF internal pressure ultrafiltration membrane filters can be replaced at the same time.

[0027] In the aforementioned piped direct drinking water equipment, a carbon fiber inlet pressure sensor is installed on the pipeline between the antibacterial PVDF internal pressure ultrafiltration membrane assembly and the antibacterial carbon fiber filter assembly; a third water flow regulating valve and a third glass float flow meter are sequentially installed in the direction of water flow before the third inlet of each antibacterial carbon fiber filter.

[0028] The aforementioned piped drinking water equipment, wherein each of the aforementioned antibacterial PVDF internal pressure ultrafiltration membrane filters is further provided with an ultrafiltration membrane flushing water outlet;

[0029] The ultrafiltration membrane flushing water outlet is connected to the sixth water inlet; an ultrafiltration membrane flushing water flow meter and a fourth solenoid valve are sequentially installed on the pipe between the ultrafiltration membrane flushing water outlet and the sixth water inlet along the water flow direction.

[0030] The aforementioned piped direct drinking water equipment includes a circulating water outlet on the pure water tank, which is sequentially connected to the RO membrane module and the fifth water inlet along the water flow direction.

[0031] A fifth solenoid valve is installed on the pipe between the circulating water outlet and the RO membrane assembly, and a sixth solenoid valve is installed on the pipe between the antibacterial carbon fiber filter assembly and the RO membrane assembly.

[0032] The aforementioned piped direct drinking water equipment includes a second conductivity meter installed on the pipe between the RO membrane module and the fifth inlet.

[0033] An RO membrane flushing pipe is also provided between the concentrated water outlet and the sixth water inlet, and a seventh solenoid valve is provided on the RO membrane flushing pipe.

[0034] The aforementioned piped drinking water equipment includes, in the pipeline between the fifth water outlet and the point of use, a first ultraviolet sterilization device, a water supply filter, a water supply pump, and a pressure stabilizing tank arranged sequentially along the water flow direction.

[0035] The aforementioned piped drinking water equipment includes a return water inlet on the pure water tank, and the fifth water outlet, the water usage point, and the return water inlet are connected sequentially along the water flow direction.

[0036] The aforementioned piped drinking water equipment includes a return water filter and a second ultraviolet sterilization device installed on the pipe between the water point and the return water inlet.

[0037] Beneficial effects: The piped drinking water equipment of this application realizes the effective recovery of RO membrane concentrate, which improves the utilization rate of water resources and reduces the cost of water purification while ensuring the quality of drinking water. Attached Figure Description

[0038] Figure 1 This is a structural schematic diagram of the piped drinking water equipment of this application.

[0039] Labeling Explanation: 100, Raw Water Tank; 200, Antibacterial PVDF Internal Pressure Ultrafiltration Membrane Module; 300, Antibacterial Carbon Fiber Filter Module; 400, RO Membrane Module; 500, Pure Water Tank; 600, Point of Use; 700, Concentrate Tank; 110, First Conductivity Meter; 101, First Solenoid Valve; 102, Second Solenoid Valve; 103, Third Solenoid Valve; 104, Fourth Solenoid Valve; 105, Fifth Solenoid Valve; 106, Sixth Solenoid Valve; 107, Seventh Solenoid Valve; 111, Tenth Solenoid Valve; 410, High-Pressure Pump; 420, Membrane Pre-Pressure Sensor; 430, Concentrate Flow Regulator Valve; 440, Concentrate Flow Meter; 401 1. First water flow regulating valve; 402. First glass float flow meter; 210. Pressure sensor before ultrafiltration membrane; 220. Flow meter before ultrafiltration membrane; 201. Second water flow regulating valve; 202. Second glass float flow meter; 310. Pressure sensor before carbon fiber; 301. Third water flow regulating valve; 302. Third glass float flow meter; 230. Ultrafiltration membrane flushing water flow meter; 450. Second conductivity meter; 601. First ultraviolet sterilization device; 602. Water supply filter; 603. Water supply pump; 604. Pressure stabilizing tank; 605. Return water filter; 606. Second ultraviolet sterilization device; 800. Municipal tap water pipeline. Detailed Implementation

[0040] This application provides a piped drinking water device. To make the purpose, technical solution, and effects of this application clearer and more explicit, the following provides a more detailed description. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0041] This application proposes a piped direct drinking water device, comprising a raw water tank 100, an antibacterial PVDF internal pressure ultrafiltration membrane module 200, an antibacterial carbon fiber filter module 300, an RO membrane module 400, and a pure water tank 500 connected in sequence.

[0042] The raw water tank 100 is equipped with a first conductivity meter 110, a first water inlet, and a second water outlet;

[0043] The antibacterial PVDF internal pressure ultrafiltration membrane module 200 is equipped with at least one antibacterial PVDF internal pressure ultrafiltration membrane filter, and each antibacterial PVDF internal pressure ultrafiltration membrane filter is equipped with a second inlet and a first outlet.

[0044] The antibacterial carbon fiber filter assembly 300 is equipped with at least one antibacterial carbon fiber filter, and each antibacterial carbon fiber filter is equipped with a third inlet and a third outlet.

[0045] The RO membrane module 400 is equipped with at least one RO membrane filter, and each RO membrane filter is equipped with a fourth inlet, a fourth outlet and a concentrate outlet.

[0046] The pure water tank 500 is equipped with a fifth inlet and a fifth outlet.

[0047] The piped drinking water equipment of this application also includes a concentrated water tank 700, which is provided with a sixth inlet and a sixth outlet.

[0048] The first inlet is connected to the municipal water supply pipe 800, the sixth outlet, and the concentrated water outlet respectively; a first solenoid valve 101 is installed on the pipe between the first inlet and the sixth outlet; a second solenoid valve 102 is installed on the pipe between the first inlet and the concentrated water outlet; and a tenth solenoid valve 111 is installed on the pipe between the first inlet and the municipal water supply pipe 800.

[0049] The sixth water inlet is connected to the concentrate outlet; a third solenoid valve 103 is installed on the pipe between the sixth water inlet and the concentrate outlet;

[0050] The first outlet is connected to the second inlet;

[0051] The second outlet is connected to the third inlet;

[0052] The third outlet is connected to the fourth inlet;

[0053] The fourth outlet is connected to the fifth inlet of the 500 pure water tank;

[0054] The fifth water outlet is connected to water point 600.

[0055] Specifically, the raw water tank 100, as the initial water storage unit of the system, is configured to receive municipal tap water and recycled concentrate. The first conductivity meter 110 is used to monitor the water quality in the raw water tank 100 in real time, specifically the conductivity level within the raw water tank 100. The antibacterial PVDF internal pressure ultrafiltration membrane module 200 and the antibacterial carbon fiber filter module 300 are used to remove suspended solids, particles, bacteria, and large molecular organic matter from the raw water. The RO membrane module 400 is the core purification unit, using the reverse osmosis principle to remove dissolved salts, heavy metal ions, and other impurities from the water. The pure water tank 500 is used to store the pure water deeply purified by the RO membrane module 400 and to supply water to the water point 600. The concentrate tank 700 is an intermediate storage unit set up for the piped drinking water equipment of this application, used to temporarily store the concentrate discharged from the RO membrane module 400 when the conductivity exceeds the standard.

[0056] When the piped drinking water equipment of this application is in operation, municipal tap water enters the raw water tank 100 through the first inlet. Under normal operating conditions, the first solenoid valve 101 and the third solenoid valve 103 are closed, while the second solenoid valve 102 and the tenth solenoid valve 111 are open. Both the concentrate produced by the RO membrane module 400 and the municipal tap water enter the raw water tank 100 for reuse. When the conductivity of the raw water detected by the first conductivity meter 110 in the raw water tank 100 exceeds a preset value, the second solenoid valve 102 closes, and the first solenoid valve 101 and the third solenoid valve 103 open, allowing the concentrate to flow into the concentrate tank 700 for storage. Furthermore, the concentrate in the concentrate tank 700 mixes with the municipal tap water at a preset low ratio before entering the raw water tank 100. When the conductivity of the raw water in the raw water tank 100 returns to the preset value, the second solenoid valve 102 opens, and the first solenoid valve 101 and the third solenoid valve 103 close, restoring the normal operating state. The above operating method enables the effective recovery of RO membrane concentrate, which improves water resource utilization and reduces water purification costs while ensuring the quality of drinking water.

[0057] The present application further proposes that a high-pressure pump 410 and a pre-membrane pressure sensor 420 are sequentially installed along the water flow direction on the pipeline between the antibacterial carbon fiber filter assembly 300 and the RO membrane assembly 400; a concentrate flow regulating valve 430 and a concentrate flow meter 440 are sequentially installed along the water flow direction on the pipeline between the sixth inlet and the concentrate outlet; and a first flow regulating valve 401 and a first glass float flow meter 402 are sequentially installed along the water flow direction on the pipeline between the pre-membrane pressure sensor 420 and the fourth inlet of each RO membrane filter.

[0058] At the pipe connection between the antibacterial carbon fiber filter assembly 300 and the RO membrane assembly 400, a high-pressure pump 410 is installed to increase the water flow pressure. A pre-membrane pressure sensor 420 is installed downstream of the high-pressure pump 410 to monitor the pressure before the inlet of the RO membrane assembly 400. At the pipe connection between the sixth inlet and the concentrate outlet, a concentrate flow regulating valve 430 and a concentrate flow meter 440 are installed in series. The concentrate flow regulating valve is used to regulate the concentrate recirculation flow rate, and the concentrate flow meter is used to measure the concentrate recirculation flow rate. The pipe after the pre-membrane pressure sensor 420 is divided into multiple branches, each branch connecting to the fourth inlet of an RO membrane filter. On each branch, a first flow regulating valve 401 and a first glass float flow meter 402 are installed in series. The first flow regulating valve is used to regulate the inlet flow rate into each RO membrane filter, and the first glass float flow meter is used to visually display the inlet flow rate of each RO membrane filter. Therefore, by monitoring the pressure through the pre-membrane pressure sensor 420, coordinating the flow rate regulation of the concentrate flow regulating valve and the first flow regulating valve, and using the first glass float flow meter to assist operators in visually observing and adjusting the flow rate, constant flow water supply before the membrane is achieved. Furthermore, this implementation method effectively solves the problem of uneven water flow distribution in the RO membrane module 400, improving the utilization rate and service life of the RO membrane, and making maintenance and replacement operations more convenient.

[0059] Specifically, during the installation and commissioning phase of the piped drinking water equipment, after the high-pressure pump 410 starts, the pre-membrane pressure sensor 420 monitors the water supply pressure before the RO membrane module 400 in real time to ensure that the RO membrane module 400 operates under stable pressure. The staff initially sets the flow rate of the concentrated water return by adjusting the concentrate flow regulating valve 430. Subsequently, the staff observes the readings of each first glass float flowmeter and fine-tunes each first flow regulating valve to ensure that the readings of all first glass float flowmeters are consistent, thereby ensuring that the flow rate entering each RO membrane filter is uniform and achieving constant flow water supply before the membrane. During equipment operation, the concentrate flowmeter continuously accumulates the total concentrated water return volume. When the accumulated flow reaches the preset value, it prompts the staff to replace all RO membrane filters uniformly, maximizing the utilization of each RO membrane filter. Through the above method, each RO membrane filter of the RO membrane module 400 can operate under constant flow, improving the utilization rate of the RO membrane, extending its service life, and facilitating maintenance and replacement.

[0060] The present application further proposes that an ultrafiltration membrane pressure sensor 210 and an ultrafiltration membrane flow meter 220 are sequentially installed along the water flow direction on the pipeline between the raw water tank 100 and the antibacterial PVDF internal pressure ultrafiltration membrane module 200; and a second water flow regulating valve 201 and a second glass float flow meter 202 are sequentially installed along the water flow direction before the second inlet of each antibacterial PVDF internal pressure ultrafiltration membrane filter.

[0061] Specifically, by installing an ultrafiltration membrane pre-pressure sensor 210 and an ultrafiltration membrane pre-flow meter 220 on the pipeline between the raw water tank 100 and the antibacterial PVDF internal pressure ultrafiltration membrane module 200, the overall pressure and flow rate entering the ultrafiltration membrane module can be monitored. More importantly, by installing a second water flow regulating valve 201 and a second glass float flow meter 202 before the second inlet of each antibacterial PVDF internal pressure ultrafiltration membrane filter, the inlet flow rate of each antibacterial PVDF internal pressure ultrafiltration membrane filter can be adjusted and visually monitored. During the installation and commissioning phase of the piped drinking water equipment, staff can observe the reading of the second glass float flow meter and adjust the second water flow regulating valve to ensure that each antibacterial PVDF internal pressure ultrafiltration membrane filter obtains a consistent and desired flow rate, thereby achieving a constant flow water supply from the antibacterial PVDF internal pressure ultrafiltration membrane module 200. The constant flow water supply maximizes the utilization of each antibacterial PVDF internal pressure ultrafiltration membrane filter, and all antibacterial PVDF internal pressure ultrafiltration membrane filters can be replaced uniformly when the reading of the flow meter before the ultrafiltration membrane reaches the preset flow value, facilitating maintenance and management. The setting of the pressure sensor 210 before the ultrafiltration membrane provides pressure monitoring information to assist in monitoring the system's operating status.

[0062] The present application further proposes that a carbon fiber inlet pressure sensor 310 is installed on the pipeline between the antibacterial PVDF internal pressure ultrafiltration membrane module 200 and the antibacterial carbon fiber filter module 300; and a third water flow regulating valve 301 and a third glass float flow meter 302 are sequentially installed in the direction of water flow before the third inlet of each antibacterial carbon fiber filter.

[0063] Specifically, during the installation and commissioning phase of the piped drinking water equipment, the pressure sensor before the carbon fiber filter element group monitors the water pressure at the inlet in real time. Based on the pressure value fed back by the pressure sensor 310 and the flow rate reading displayed by the third glass float flow meter 302, staff manually adjust the opening of the third water flow regulating valve 301 before each antibacterial carbon fiber filter. By fine-tuning the third water flow regulating valve 301, the influent flow rate to each antibacterial carbon fiber filter can be precisely controlled, ensuring that the influent flow rate of all antibacterial carbon fiber filters remains as consistent as possible. When it is necessary to replace the carbon fiber filter element, the cumulative flow data of the flow meter before the ultrafiltration membrane can be referenced. When the cumulative flow rate reaches the preset value, all antibacterial carbon fiber filters can be replaced uniformly, improving the overall utilization rate and replacement efficiency of the antibacterial carbon fiber filters, avoiding waste caused by premature failure of some antibacterial carbon fiber filters, and reducing maintenance costs.

[0064] The piped drinking water equipment of this application, by setting constant flow water supply in all three types of filters (antibacterial PVDF internal pressure ultrafiltration membrane module 200, antibacterial carbon fiber filter module 300, and RO membrane module 400), can achieve unified replacement of the three types of filters, greatly reducing maintenance costs.

[0065] This application further proposes that each antibacterial PVDF internal pressure ultrafiltration membrane filter is also provided with an ultrafiltration membrane flushing water outlet;

[0066] The ultrafiltration membrane flushing water outlet is connected to the sixth inlet of the concentrate tank 700; an ultrafiltration membrane flushing water flow meter 230 and a fourth solenoid valve 104 are sequentially installed on the pipeline between the ultrafiltration membrane flushing water outlet and the sixth inlet along the water flow direction.

[0067] Specifically, the antibacterial PVDF internal pressure ultrafiltration membrane filter requires periodic flushing. In this design, flushing is performed once at a certain flow rate. Therefore, when the flow meter 220 before the ultrafiltration membrane reaches the preset value, the fourth solenoid valve 104 opens to flush the antibacterial PVDF internal pressure ultrafiltration membrane module 200. The ultrafiltration flushing concentrate generated flows into the concentrate tank 700. The ultrafiltration membrane flushing water flow meter 230 is used to record the flushing concentrate flow rate of the antibacterial PVDF internal pressure ultrafiltration membrane module 200. When the flushing concentrate flow rate reaches the preset value, the fourth solenoid valve 104 closes, and the antibacterial PVDF internal pressure ultrafiltration membrane module 200 resumes operation.

[0068] The present application further proposes that the pure water tank 500 is also equipped with a circulating water outlet, which is connected in sequence to the RO membrane module 400 and the fifth inlet; a fifth solenoid valve 105 is installed on the pipeline between the circulating water outlet and the RO membrane module 400, and a sixth solenoid valve 106 is installed on the pipeline between the antibacterial carbon fiber filter module 300 and the RO membrane module 400.

[0069] Specifically, a circulating water outlet is added to the pure water tank 500 to construct a pure water circulation pipeline. The circulating water outlet can be located at or near the bottom of the side wall of the pure water tank 500 to facilitate effective circulation of the pure water within the tank. The circulating water outlet is connected to the inlet of the RO membrane module 400 via a pipe, while the outlet of the RO membrane module 400 is connected to the fifth inlet of the pure water tank 500 via a pipe, thus forming a closed circulation pipeline. A fifth solenoid valve 105 is installed on the pipeline between the circulating water outlet and the RO membrane module 400 to control the opening and closing of the circulation pipeline. A sixth solenoid valve 106 is installed on the pipeline between the antibacterial carbon fiber filter module 300 and the RO membrane module 400. In normal water production mode, the sixth solenoid valve 106 is in the open state, ensuring that water filtered by the antibacterial carbon fiber filter module 300 can enter the RO membrane module 400 for further purification. When pure water circulation is required, the fifth solenoid valve 105 is opened and the sixth solenoid valve 106 is closed, allowing pure water to be drawn from the pure water tank 500, passed through the RO membrane module 400, and then returned to the pure water tank 500, thus achieving pure water circulation. During circulation, the pure water undergoes further filtration by the RO membrane module 400, which can further remove any bacteria that may grow, keeping the water fresh. After circulation is complete, the fifth solenoid valve 105 is closed and the sixth solenoid valve 106 is reopened, restoring the equipment to normal water production.

[0070] The present application further proposes that a second conductivity meter 450 be installed on the pipeline between the fifth inlet of the RO membrane module 400 and the pure water tank 500; a reverse osmosis membrane flushing pipeline is also installed between the concentrate outlet and the sixth inlet of the concentrate tank 700, and a seventh solenoid valve 107 is installed on the reverse osmosis membrane flushing pipeline.

[0071] Specifically, a second conductivity meter 450 is installed on the pipeline between the RO membrane module 400 and the fifth inlet of the pure water tank 500 to monitor the conductivity level of the water entering the pure water tank 500 after passing through the RO membrane module 400. A reverse osmosis membrane flushing pipeline is connected between the concentrate outlet and the sixth inlet of the concentrate tank 700, providing a channel for flushing the RO membrane module. A seventh solenoid valve 107 is installed on the reverse osmosis membrane flushing pipeline to control the start and stop of the flushing process. Thus, the second conductivity meter 450 monitors water quality in real time, and automatically activates the reverse osmosis membrane flushing function when water quality indicators exceed preset ranges. Through this flushing process, the performance of the RO membrane module 400 can be effectively restored, its service life extended, and the stability of the pure water quality ensured.

[0072] The present application further proposes that a first ultraviolet sterilization device 601, a water supply filter 602, a water supply pump 603 and a pressure stabilizing tank 604 be sequentially installed along the water flow direction on the pipeline between the fifth outlet of the pure water tank 500 and the water point 600.

[0073] Specifically, the first ultraviolet sterilization device 601 is configured to sterilize pure water to ensure the safety of the water delivered to the water point 600 at the microbiological level. As a preferred embodiment, the first ultraviolet sterilization device can use an ultraviolet lamp; when pure water flows through the area irradiated by the ultraviolet lamp, bacteria, viruses, and other microorganisms in the water are effectively killed. The water supply filter 602 is configured to further filter out any small particulate impurities that may be present in the water. For example, the water supply filter can use a precision filter element to remove any suspended solids and small particles that may be present in the water. The water supply pump 603 is configured to increase the water pressure in the pipeline to ensure sufficient water pressure at the water point 600. Specifically, the water supply pump can be a booster pump, providing stable and reliable pressure according to the water pressure requirements of the water point 600. The pressure stabilizing tank 604 is configured to stabilize the pressure in the water supply pipeline, avoiding pressure fluctuations to ensure the stability of the water supply pressure. For example, the pressure stabilizing tank can be a bladder-type pressure stabilizing tank, using the compressibility of gas to balance water pressure fluctuations. Therefore, through the synergistic effect of the first ultraviolet sterilization device, water supply filter, water supply pump and pressure stabilizing tank, the quality of pure water can be further guaranteed and the stability of water supply can be improved.

[0074] The proposed solution further suggests that the pure water tank 500 is also equipped with a return water inlet, and the fifth water outlet of the pure water tank 500, the water point 600, and the return water inlet are connected in sequence along the water flow direction.

[0075] Specifically, a pure water circulation system is constructed by installing a return water inlet on the pure water tank 500 and connecting the fifth outlet of the pure water tank 500, the water point 600, and the return water inlet into a pipeline. When a user uses water, pure water flows out from the fifth outlet of the pure water tank 500 and reaches the water point 600 for the user to use. When the water point 600 stops drawing water, the unused pure water in the pipeline continues to flow along the pipeline and eventually returns to the pure water tank 500 through the return water inlet, thus achieving pure water circulation. This continuous circulation of pure water effectively prevents water quality deterioration that may occur due to long-term stagnation in the pipeline, ensuring that the pure water used by the user at the water point 600 is always fresh and of high quality.

[0076] The present application further proposes that a return water filter 605 and a second ultraviolet sterilization device 606 be installed on the pipe between the water point 600 and the return water inlet.

[0077] Specifically, when the piped drinking water equipment is running, the purified water in the purified water tank 500 is delivered to the water point 600 for user use through the fifth outlet. A portion of the purified water, after reaching the water point 600, returns to the return water inlet of the purified water tank 500 through the return water pipeline, forming a return water cycle. During the return water process, the return water first passes through the return water filter 605, where particulate matter is filtered out, initially ensuring the quality of the return water. Subsequently, the filtered water flows into the second ultraviolet sterilization device 606, where ultraviolet radiation effectively kills bacteria and microorganisms, further improving the quality of the return water. The double-purified return water finally returns to the purified water tank 500, mixing with the purified water inside, maintaining the freshness and safety of the water in the purified water tank 500 and the entire pipeline system. This effectively prevents the return water from contaminating the water in the purified water tank 500, ensuring the quality of the user's drinking water.

[0078] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of this application.

Claims

1. A piped drinking water device, characterized in that, It includes a raw water tank, an antibacterial PVDF internal pressure ultrafiltration membrane module, an antibacterial carbon fiber filter module, an RO membrane module, and a pure water tank connected in sequence. The raw water tank is equipped with a first conductivity meter, a first inlet and a first outlet; The antibacterial PVDF internal pressure ultrafiltration membrane module is provided with at least one antibacterial PVDF internal pressure ultrafiltration membrane filter, and each of the antibacterial PVDF internal pressure ultrafiltration membrane filters is provided with a second inlet and a second outlet. The antibacterial carbon fiber filter assembly is provided with at least one antibacterial carbon fiber filter, and each antibacterial carbon fiber filter is provided with a third water inlet and a third water outlet. The RO membrane module is equipped with at least one RO membrane filter, and each RO membrane filter is equipped with a fourth inlet, a fourth outlet and a concentrate outlet. The pure water tank is equipped with a fifth inlet and a fifth outlet; The piped drinking water equipment also includes a concentrated water tank, which is equipped with a sixth inlet and a sixth outlet. The first water inlet is connected to the municipal tap water pipeline, the sixth water outlet, and the concentrated water outlet respectively; a first solenoid valve is installed on the pipeline between the first water inlet and the sixth water outlet; a second solenoid valve is installed on the pipeline between the first water inlet and the concentrated water outlet; and a tenth solenoid valve is installed on the pipeline between the first water inlet and the municipal tap water pipeline. The sixth water inlet is connected to the concentrated water outlet; a third solenoid valve is installed on the pipe between the sixth water inlet and the concentrated water outlet; The first outlet is connected to the second inlet; The second outlet is connected to the third inlet; The third outlet is connected to the fourth inlet; The fourth outlet is connected to the fifth inlet; The fifth water outlet is connected to the point of use.

2. The piped drinking water equipment according to claim 1, characterized in that, A high-pressure pump and a membrane pressure sensor are sequentially installed on the pipeline between the antibacterial carbon fiber filter assembly and the RO membrane assembly along the water flow direction; a concentrate flow regulating valve and a concentrate flow meter are sequentially installed on the pipeline between the sixth inlet and the concentrate outlet along the water flow direction. A first water flow regulating valve and a first glass float flow meter are sequentially installed along the water flow direction on the pipeline between the pre-membrane pressure sensor and the fourth inlet of each RO membrane filter.

3. The piped drinking water equipment according to claim 1, characterized in that, An ultrafiltration membrane pressure sensor and an ultrafiltration membrane flow meter are sequentially installed along the water flow direction on the pipeline between the raw water tank and the antibacterial PVDF internal pressure ultrafiltration membrane module; a second water flow regulating valve and a second glass float flow meter are sequentially installed along the water flow direction before the second inlet of each antibacterial PVDF internal pressure ultrafiltration membrane filter.

4. The piped drinking water equipment according to claim 3, characterized in that, A carbon fiber inlet pressure sensor is installed on the pipeline between the antibacterial PVDF internal pressure ultrafiltration membrane module and the antibacterial carbon fiber filter module; a third water flow regulating valve and a third glass float flow meter are sequentially installed in the direction of water flow before the third inlet of each antibacterial carbon fiber filter.

5. The piped drinking water equipment according to claim 3, characterized in that, Each of the aforementioned antibacterial PVDF internal pressure ultrafiltration membrane filters is also provided with an ultrafiltration membrane flushing water outlet; The ultrafiltration membrane flushing water outlet is connected to the sixth water inlet; an ultrafiltration membrane flushing water flow meter and a fourth solenoid valve are sequentially installed on the pipe between the ultrafiltration membrane flushing water outlet and the sixth water inlet along the water flow direction.

6. The piped drinking water equipment according to claim 1, characterized in that, The pure water tank is also equipped with a circulating water outlet, which is connected in sequence to the RO membrane module and the fifth water inlet along the water flow direction. A fifth solenoid valve is installed on the pipe between the circulating water outlet and the RO membrane assembly, and a sixth solenoid valve is installed on the pipe between the antibacterial carbon fiber filter assembly and the RO membrane assembly.

7. The piped drinking water equipment according to claim 1, characterized in that, A second conductivity meter is installed on the pipe between the RO membrane module and the fifth inlet. An RO membrane flushing pipe is also provided between the concentrated water outlet and the sixth water inlet, and a seventh solenoid valve is provided on the RO membrane flushing pipe.

8. The piped drinking water equipment according to claim 1, characterized in that, The pipeline between the fifth water outlet and the water point is sequentially equipped with a first ultraviolet sterilization device, a water supply filter, a water supply pump, and a pressure stabilizing tank along the water flow direction.

9. The piped drinking water equipment according to claim 1, characterized in that, The pure water tank is also equipped with a return water inlet, and the fifth water outlet, the water usage point, and the return water inlet are connected in sequence along the water flow direction.

10. The piped drinking water equipment according to claim 9, characterized in that, A return water filter and a second ultraviolet sterilization device are installed on the pipe between the water point and the return water inlet.

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