Integrated drinking water filtering and preparing system

Abstract

The utility model discloses an integrated drinking water filtering and preparing system, and belongs to the technical field of drinking water treatment. The system comprises a pretreatment unit, a main treatment unit, a post-treatment unit and a control system. The pretreatment unit comprises a coarse filter and an activated carbon filter, the main treatment unit comprises an ultrafiltration membrane assembly and a reverse osmosis membrane assembly, and the post-treatment unit comprises an ultraviolet sterilizer and a mineralization reactor. Wherein the ultrafiltration membrane component adopts a hollow fiber membrane stack, a first membrane stack group and a second membrane stack group are connected in parallel, a water inlet end and a water outlet end are respectively communicated with the active carbon filter and the reverse osmosis membrane component through a first three-way electromagnetic valve and a second three-way electromagnetic valve, and the two electromagnetic valves are connected with a control system and can switch the water flow directions of the two membrane stack groups. The integrated drinking water filtering and preparing system provided by the utility model can integrate various water treatment technologies, can efficiently and stably filter and prepare drinking water, is compact in system structure and low in maintenance cost, and is suitable for various occasions such as families, business and industry.

Description

Technical Field

[0001] This utility model belongs to the field of drinking water treatment technology, and in particular relates to an integrated drinking water filtration and preparation system. Background Technology

[0002] As people's requirements for drinking water quality increase, traditional single filtration technology is difficult to meet the needs of removing multiple pollutants such as suspended solids, organic matter, bacteria, and dissolved salts.

[0003] Although multi-stage filtration systems improve water quality by combining pretreatment, filtration, and disinfection units, existing technologies still face significant bottlenecks: First, the independent setup of each treatment unit results in a dispersed equipment layout and low integration, occupying a large amount of space and complicating installation and maintenance processes, making it difficult to adapt to compact application scenarios. Second, key operational operations such as backwashing and pressure regulation rely on manual intervention, lacking sufficient automation control capabilities, leading to low system efficiency, high maintenance costs, and an inability to dynamically adjust treatment parameters in real time according to changes in water quality. Third, most system designs focus on pollutant removal, lacking processes for retaining or supplementing natural minerals in drinking water, resulting in a monotonous taste in the treated water, failing to meet people's demand for high-quality drinking water with a balanced mineral profile. To address these issues, there is an urgent need for a compact, highly integrated, and functionally unified filtration and preparation system. Summary of the Invention

[0004] This utility model solves, to at least a certain extent, one of the technical problems in the related art.

[0005] Therefore, this application aims to provide an integrated drinking water filtration and preparation system, which, through innovative integrated design of the drinking water filtration and preparation system, takes into account mineral fortification process, and retains or supplements beneficial minerals while removing contaminants.

[0006] To achieve the above objectives, this utility model provides an integrated drinking water filtration and preparation system, comprising:

[0007] An integrated drinking water filtration and preparation system includes a pretreatment unit, a main treatment unit, and a posttreatment unit connected sequentially along the water flow direction, as well as a control system that connects the pretreatment unit, the main treatment unit, and the posttreatment unit respectively; the pretreatment unit includes a coarse filter and an activated carbon filter, the main treatment unit includes an ultrafiltration membrane module and a reverse osmosis membrane module, and the posttreatment unit includes an ultraviolet sterilizer and a mineralization reactor.

[0008] The ultrafiltration membrane module uses hollow fiber membrane stacks, which include a first membrane stack group and a second membrane stack group connected in parallel. The inlet of the first membrane stack group and the second membrane stack group is connected to the outlet of the activated carbon filter through a first three-way solenoid valve. The outlet of the first membrane stack group and the second membrane stack group is connected to the inlet of the reverse osmosis membrane module through a second three-way solenoid valve. The first three-way solenoid valve and the second three-way solenoid valve are electrically connected to the control system to switch the water flow direction of the first membrane stack group and the second membrane stack group for alternating filtration and backwashing.

[0009] In some embodiments, the coarse filter includes a first tank containing a metal wire mesh filter element, the inlet of the coarse filter has a quick-release filter element replacement port, and the outlet of the coarse filter is connected to the inlet of the activated carbon filter.

[0010] In some embodiments, the activated carbon filter includes a second tank filled with coconut shell activated carbon, a backwash drain port on the side of the second tank, and a fully automatic multi-way valve on the top of the second tank. The fully automatic multi-way valve is electrically connected to the control system to switch between raw water filtration and filter media backwashing states.

[0011] In some embodiments, an electromagnetic flow meter is installed on the pipe connecting the activated carbon filter and the coarse filter, and a water conductivity meter is installed on the pipe connecting the activated carbon filter and the ultrafiltration membrane module. The electromagnetic flow meter and the water conductivity meter are connected to the control system.

[0012] In some embodiments, the reverse osmosis membrane module includes a membrane sheet, a flow guide net, a central tube, and a housing. The membrane sheet, the flow guide net, and the central tube are disposed inside the housing. The membrane sheet has a spiral rolled structure and is wound around the outside of the central tube after being spaced by the flow guide net. The outlet end of the reverse osmosis membrane module is connected to the inlet end of the ultraviolet sterilizer.

[0013] In some embodiments, the reverse osmosis membrane module further includes a pressure sensor and a regulating valve located at the inlet end of the reverse osmosis membrane module. The pressure sensor is communicatively connected to the control system, and the regulating valve is electrically connected to the control system to adjust the opening degree of the regulating valve according to the inlet pressure.

[0014] In some embodiments, the ultraviolet sterilizer includes a metal cylinder and an ultraviolet lamp with a quartz sleeve disposed inside the metal cylinder. The inner wall of the metal cylinder is polished, and spiral blades surrounding the ultraviolet lamp are provided inside the metal cylinder. The outlet of the ultraviolet sterilizer is connected to the inlet of the mineralization reactor.

[0015] In some embodiments, the mineralization reactor has a cylindrical cavity filled with a composite filter media of maifanite and tourmaline, and filter screens are respectively provided at the inlet and outlet of the mineralization reactor.

[0016] In some embodiments, the post-treatment unit further includes a mineral concentration sensor located at the effluent end of the mineralization reactor. The mineral concentration sensor is communicatively connected to the control system to monitor the mineral content in the mineralized water.

[0017] In some embodiments, a turbidity sensor is provided at the outlet of the coarse filter, and the turbidity sensor is communicatively connected to the control system to monitor the turbidity of the water after coarse filtration.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. The integrated drinking water filtration and preparation system provided by this utility model achieves intelligent operation through the coordinated design of the pretreatment unit, main treatment unit, and post-treatment unit, in conjunction with the control system. The ultrafiltration membrane module adopts a dual-membrane stack alternating filtration and backwashing structure, which can complete the self-cleaning of the membrane module without interrupting the water supply, effectively reducing the frequency of manual maintenance, improving the continuous operation capability of the system, extending the service life of the membrane module, and ensuring the stability of the effluent water quality.

[0020] 2. The post-processing unit of the integrated drinking water filtration and preparation system provided by this utility model includes an ultraviolet sterilizer. Its inner wall polishing treatment combined with the spiral blade design reduces water flow dead angles and extends the ultraviolet irradiation path, which significantly increases the contact area and time between the water flow and the ultraviolet lamp, improves the utilization rate of ultraviolet energy and disinfection efficiency, and provides a more reliable guarantee for drinking water safety. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of one embodiment of the integrated drinking water filtration and preparation system of this utility model;

[0023] Figure 2 This is a schematic diagram of the ultrafiltration membrane module structure of one embodiment of the integrated drinking water filtration preparation system of this utility model;

[0024] Figure 3 This is a control principle block diagram of one embodiment of the integrated drinking water filtration and preparation system of this utility model.

[0025] In the picture:

[0026] 1. Pretreatment Unit; 11. Coarse Filter; 111. Turbidity Sensor; 12. Activated Carbon Filter; 121. Fully Automatic Multi-way Valve; 122. Electromagnetic Flow Meter; 123. Water Conductivity Meter; 2. Main Treatment Unit; 21. Ultrafiltration Membrane Module; 201. First Membrane Stack; 202. Second Membrane Stack; 203. First Three-Way Solenoid Valve; 204. Second Three-Way Solenoid Valve; 22. Reverse Osmosis Membrane Module; 221. Pressure Sensor; 222. Regulating Valve; 3. Posttreatment Unit; 31. Ultraviolet Sterilizer; 32. Mineralization Reactor; 33. Mineral Concentration Sensor; 4. Control System. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] See appendix Figures 1 to 3 This paper presents an illustrative embodiment of the integrated drinking water filtration and preparation system proposed in this utility model. The integrated drinking water filtration and preparation system includes a pretreatment unit 1, a main treatment unit 2, and a post-treatment unit 3 connected sequentially along the water flow direction, as well as a control system 4 that connects the pretreatment unit 1, the main treatment unit 2, and the post-treatment unit 3 respectively.

[0031] The pretreatment unit 1 includes a coarse filter 11 and an activated carbon filter 12; the main treatment unit 2 includes an ultrafiltration membrane module 21 and a reverse osmosis membrane module 22; and the post-treatment unit 3 includes an ultraviolet sterilizer 31 and a mineralization reactor 32. The control system 4 uses a PLC controller, which has data acquisition, logic operation, and equipment control functions. It connects to the sensors, solenoid valves, and other devices in each unit via wired communication to achieve automated control of the entire system.

[0032] The coarse filter 11 includes a first tank, which is a cylindrical stainless steel tank with an anti-corrosion inner wall. The first tank contains a metal wire mesh filter element made of 316L stainless steel with a mesh size of 50, effectively removing suspended solids, silt, rust, and other large particles larger than 300 micrometers from the raw water. The inlet of the coarse filter 11 has a quick-release filter element replacement port, which is connected by a flange with a rubber sealing ring between the flanges to ensure a tight seal. When the filter element needs to be replaced, simply loosen the flange bolts to remove the old filter element and install the new one; the operation is convenient. The outlet of the coarse filter 11 is connected to the inlet of the activated carbon filter 12.

[0033] A turbidity sensor 111 is installed at the outlet of the coarse filter 11. The turbidity sensor 111 adopts an optical principle and is model WTG-200, which is connected to the control system 4. The turbidity sensor 111 monitors the turbidity of the water after coarse filtration in real time and transmits the data to the control system 4. When the turbidity value exceeds the set threshold (e.g., 5 NTU), the control system 4 issues an alarm signal, prompting the operator to maintain the coarse filter 11 or replace the filter element.

[0034] The activated carbon filter 12 includes a second tank, which is also a cylindrical stainless steel tank. A backwash drain port is located on the side of the tank, 10cm above the bottom of the tank, with a diameter of DN50, used to discharge wastewater carrying impurities during the backwashing process. The second tank is filled with coconut shell activated carbon with a particle size of 2-4mm, filling to 3 / 4 of the tank's height. This effectively adsorbs organic matter, residual chlorine, and pollutants such as discoloration and odor from the raw water.

[0035] The top of the second tank is equipped with a fully automatic multi-way valve 121, which is electrically connected to the control system 4, model Fleck5600SXT. The fully automatic multi-way valve 121 switches between raw water filtration and filter media backwashing modes by rotating the valve core. In raw water filtration mode, raw water enters from the top of the tank, passes through the activated carbon layer, and flows out from the bottom. When backwashing is required, the control system 4 sends a command to the fully automatic multi-way valve 121, causing the valve core to rotate to the backwashing position. Backwash water enters from the bottom of the tank, flushing the filter media upwards, causing the activated carbon to expand and loosen. Impurities are then discharged with the water flow from the backwash drain port on the side.

[0036] An electromagnetic flowmeter 122 (model E+HPromagP) is installed on the pipe connecting the activated carbon filter 12 and the coarse filter 11. This flowmeter measures the water flow rate entering the activated carbon filter 12 and is connected to the control system 4. A water conductivity meter 123 (model DDS-307A) is installed on the pipe connecting the activated carbon filter 12 and the ultrafiltration membrane module 21. This conductivity meter measures the conductivity of the water after activated carbon filtration, reflecting the ion content in the water. It is also connected to the control system 4. The control system 4 determines the operating status of the activated carbon filter 12 based on the data from the electromagnetic flowmeter 122 and the water conductivity meter 123. When the conductivity exceeds a set value (e.g., 100 μS / cm), a backwashing procedure is triggered.

[0037] The ultrafiltration membrane module 21 uses a hollow fiber membrane stack, which includes a first membrane stack group 201 and a second membrane stack group 202 connected in parallel. Both the first membrane stack group 201 and the second membrane stack group 202 are composed of multiple hollow fiber membrane elements. The outer shell of each membrane element is made of ABS material, and the internal hollow fiber membrane is made of polyvinylidene fluoride (PVDF) material with a pore size of 0.01 micrometers, which can remove impurities such as colloids, bacteria, and large molecular organic matter from the water.

[0038] The inlet ends of the first membrane stack 201 and the second membrane stack 202 are connected to the outlet end of the activated carbon filter 12 via a first three-way solenoid valve 203. The first three-way solenoid valve 203 is a model SMCVX3120 and is electrically connected to the control system 4. The outlet ends of the first membrane stack 201 and the second membrane stack 202 are connected to the inlet end of the reverse osmosis membrane module 22 via a second three-way solenoid valve 204. The second three-way solenoid valve 204 is the same model as the first three-way solenoid valve 203 and is electrically connected to the control system 4.

[0039] The control system 4 switches the first three-way solenoid valve 203 and the second three-way solenoid valve 204 at timed intervals to switch the water flow direction between the first membrane stack 201 and the second membrane stack 202, thereby alternating filtration and backwashing. For example, the filtration time is set to 30 minutes and the backwashing time to 5 minutes. When the first membrane stack 201 is in filtration mode, water enters the first membrane stack 201 from the inlet end, passes through the hollow fiber membrane, and flows out from the outlet end to the reverse osmosis membrane module 22. At this time, the second membrane stack 202 is in backwashing mode. Backwash water enters the second membrane stack 202 from the outlet end to backwash the pollutants on the surface of the hollow fiber membrane. Wastewater is discharged from the inlet end. Specifically, the backwash water enters the second membrane stack 202 from the backwash water inlet set on the pipeline connecting the second three-way solenoid valve 204 and the second membrane stack 202, and the wastewater is discharged from the wastewater outlet set on the pipeline connecting the first three-way solenoid valve 203 and the second membrane stack 202. After 30 minutes, the control system 4 controls the two three-way solenoid valves to switch, the first membrane stack 201 enters the backwashing state, and the second membrane stack 202 enters the filtration state. This alternating operation ensures the continuous and efficient operation of the ultrafiltration membrane module 21.

[0040] The reverse osmosis membrane module 22 includes a membrane sheet, a flow guide net, a central tube, and a housing. The housing is made of fiberglass, and the membrane sheet, flow guide net, and central tube are housed inside. The membrane sheet has a spiral wound structure, wound around the central tube after being spaced by the flow guide net. The membrane sheet uses an aromatic polyamide composite membrane with a desalination rate of ≥99.5%, capable of removing inorganic salts, heavy metal ions, organic matter, and other impurities from the water. The outlet of the reverse osmosis membrane module 22 is connected to the inlet of the ultraviolet sterilizer 31 via a pipe, and a one-way valve is installed on the pipe to prevent backflow.

[0041] The inlet end of the reverse osmosis membrane module 22 is equipped with a pressure sensor 221 and a regulating valve 222. The pressure sensor 221 is an MPM480 model and is connected to the control system 4 for real-time monitoring of the inlet water pressure. The regulating valve 222 is an electric regulating valve, model ZDLP-16C, and is electrically connected to the control system 4. When the pressure sensor 221 detects that the inlet water pressure is lower than the set value (e.g., 0.4 MPa), the control system 4 controls the regulating valve 222 to increase its opening, thereby increasing the inlet water flow rate. When the inlet water pressure is higher than the set value (e.g., 0.8 MPa), the control system controls the regulating valve 222 to decrease its opening, thereby reducing the inlet water flow rate. This ensures that the reverse osmosis membrane module 22 operates within a suitable pressure range, extending the service life of the membrane element.

[0042] The ultraviolet sterilizer 31 includes a metal cylinder and an ultraviolet lamp with a quartz sleeve housed within the metal cylinder. The metal cylinder is made of stainless steel with a polished inner wall and a surface roughness Ra≤0.8μm, which improves the reflectivity of ultraviolet light and enhances the sterilization effect. The ultraviolet lamp is a low-pressure, high-intensity mercury lamp with a power of 40W. The quartz sleeve protects the ultraviolet lamp while allowing ultraviolet light to penetrate. The metal cylinder contains spiral blades surrounding the ultraviolet lamp. The spiral blades have a pitch of 100mm and a height of 50mm and are made of stainless steel. When water flows through the ultraviolet sterilizer 31, the spiral blades create a spiral flow, increasing the water's residence time and turbulence within the sterilizer, ensuring that the ultraviolet light fully irradiates bacteria, viruses, and other microorganisms in the water, achieving a kill rate ≥99.9%. The outlet of the ultraviolet sterilizer 31 is connected to the inlet of the mineralization reactor 32 via a pipe.

[0043] The mineralization reactor 32 has a cylindrical cavity made of stainless steel, filled with a composite filter media of maifanite and tourmaline. The volume ratio of maifanite to tourmaline is 3:2. The maifanite releases mineral ions such as potassium, sodium, calcium, and magnesium, while the tourmaline generates far-infrared rays and negative oxygen ions, improving water quality. Filter screens with a 0.5mm pore size are installed at both the inlet and outlet of the mineralization reactor 32 to intercept filter media particles and prevent them from entering subsequent pipelines.

[0044] The post-treatment unit 3 also includes a mineral concentration sensor 33 located at the effluent end of the mineralization reactor 32. The mineral concentration sensor 33 is an SC-200 model and is connected to the control system 4 for monitoring the mineral content in the mineralized water, specifically the concentration of cations such as calcium, magnesium, and potassium. When the mineral concentration is lower than the set value (e.g., calcium content < 30 mg / L), the control system 4 issues a warning signal, indicating that the composite filter media needs to be replaced or replenished.

[0045] In the above illustrative embodiments, the integrated drinking water filtration and preparation system achieves intelligent operation through the coordinated design of the pretreatment unit, main treatment unit, and post-treatment unit, in conjunction with the control system. The ultrafiltration membrane module adopts a dual-membrane stack alternating filtration and backwashing structure, which can complete the self-cleaning of the membrane module without interrupting the water supply, effectively reducing the frequency of manual maintenance, improving the continuous operation capability of the system, extending the service life of the membrane module, and ensuring the stability of the effluent water quality.

[0046] In the above illustrative embodiment, the integrated drinking water filtration and preparation system is suitable for underground water treatment plant scenarios, specifically installed in water purification plant areas below ground level. The qualified drinking water produced is transported through a pipeline network to commercial and residential buildings above ground, providing residents with safe and high-quality drinking water. In this application scenario, the system is designed with a multi-stage filtration process tailored to the characteristics of groundwater quality, effectively addressing potential pollutants such as suspended solids and microorganisms in the groundwater to ensure that the effluent meets drinking water standards.

[0047] The following is in conjunction with the appendix Figures 1 to 3 The working process of one embodiment of the integrated drinking water filtration and preparation system of this utility model will be described as follows:

[0048] Raw water first enters the coarse filter 11, where it is filtered by a metal wire mesh filter to remove large particulate impurities. The turbidity of the coarsely filtered water is monitored by a turbidity sensor 111, and if it meets the standard, it enters the activated carbon filter 12. In the activated carbon filter 12, coconut shell activated carbon adsorbs and removes impurities such as organic matter and residual chlorine. An electromagnetic flow meter 122 and a water conductivity meter 123 monitor the water flow and conductivity, respectively. When the conductivity exceeds the standard, the fully automatic multi-way valve 121 switches to backwash.

[0049] Water filtered through activated carbon enters the main treatment unit 2, and then passes through the first three-way solenoid valve 203 into either the first membrane stack 201 or the second membrane stack 202, which is in filtration mode. The ultrafiltration membrane removes impurities such as colloids and bacteria. The filtered water then passes through the second three-way solenoid valve 204 into the reverse osmosis membrane module 22. Under the control of the pressure sensor 221 and the regulating valve 222, the reverse osmosis membrane module 22 removes impurities such as inorganic salts from the water, producing high-purity water.

[0050] High-purity water enters the ultraviolet sterilizer 31, where it is disinfected by ultraviolet irradiation under the action of spiral blades, and then enters the mineralization reactor 32. The composite filter media releases mineral ions, making the water rich in minerals beneficial to the human body. The mineral concentration sensor 33 monitors the mineral content in real time, and finally, qualified drinking water flows out from the outlet of the mineralization reactor 32.

[0051] Throughout the entire system operation, the control system 4 collects data from each sensor in real time and automatically adjusts the operating status of each device according to the preset control logic, so as to realize the intelligent and efficient operation of the system and ensure that the produced drinking water meets the standards.

[0052] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0053] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. An integrated drinking water filtration and preparation system, characterized in that, The system includes a pretreatment unit, a main treatment unit, and a posttreatment unit connected sequentially along the water flow direction, as well as a control system that connects the pretreatment unit, the main treatment unit, and the posttreatment unit respectively; the pretreatment unit includes a coarse filter and an activated carbon filter, the main treatment unit includes an ultrafiltration membrane module and a reverse osmosis membrane module, and the posttreatment unit includes an ultraviolet sterilizer and a mineralization reactor. The ultrafiltration membrane module employs hollow fiber membrane stacks, which include a first membrane stack group and a second membrane stack group connected in parallel. The inlet ends of the first membrane stack group and the second membrane stack group are connected to the outlet end of the activated carbon filter through a first three-way solenoid valve. The outlet ends of the first membrane stack group and the second membrane stack group are connected to the inlet end of the reverse osmosis membrane module through a second three-way solenoid valve. The first three-way solenoid valve and the second three-way solenoid valve are electrically connected to the control system to switch the water flow direction of the first membrane stack group and the second membrane stack group for alternating filtration and backwashing.

2. The integrated drinking water filtration and preparation system according to claim 1, characterized in that, The coarse filter includes a first tank, in which a metal wire mesh filter element is provided. The inlet end of the coarse filter is provided with a quick-release filter element replacement port, and the outlet end of the coarse filter is connected to the inlet end of the activated carbon filter.

3. The integrated drinking water filtration and preparation system according to claim 2, characterized in that, The activated carbon filter includes a second tank filled with coconut shell activated carbon. The side of the second tank is provided with a backwash drain port, and the top of the second tank is provided with a fully automatic multi-way valve. The fully automatic multi-way valve is electrically connected to the control system to switch between raw water filtration and filter media backwashing states.

4. The integrated drinking water filtration and preparation system according to claim 3, characterized in that, An electromagnetic flow meter is installed on the pipe connecting the activated carbon filter and the coarse filter, and a water conductivity meter is installed on the pipe connecting the activated carbon filter and the ultrafiltration membrane module. The electromagnetic flow meter and the water conductivity meter are communicatively connected to the control system.

5. The integrated drinking water filtration and preparation system according to claim 1, characterized in that, The reverse osmosis membrane module includes a membrane sheet, a flow guide net, a central tube, and a housing. The membrane sheet, the flow guide net, and the central tube are disposed inside the housing. The membrane sheet has a spiral rolled structure and is wound around the outside of the central tube after being spaced by the flow guide net. The water outlet of the reverse osmosis membrane module is connected to the water inlet of the ultraviolet sterilizer.

6. The integrated drinking water filtration and preparation system according to claim 5, characterized in that, The reverse osmosis membrane module also includes a pressure sensor and a regulating valve located at the inlet end of the reverse osmosis membrane module. The pressure sensor is communicatively connected to the control system, and the regulating valve is electrically connected to the control system to adjust the opening degree of the regulating valve according to the inlet pressure.

7. The integrated drinking water filtration and preparation system according to claim 5, characterized in that, The ultraviolet sterilizer includes a metal cylinder and an ultraviolet lamp with a quartz sleeve disposed inside the metal cylinder. The inner wall of the metal cylinder is polished, and the metal cylinder is provided with spiral blades surrounding the ultraviolet lamp. The water outlet of the ultraviolet sterilizer is connected to the water inlet of the mineralization reactor.

8. The integrated drinking water filtration and preparation system according to claim 7, characterized in that, The mineralization reactor has a cylindrical cavity filled with a composite filter media of maifanite and tourmaline. Filter screens are installed at the inlet and outlet of the mineralization reactor, respectively.

9. The integrated drinking water filtration and preparation system according to claim 8, characterized in that, The post-treatment unit also includes a mineral concentration sensor located at the effluent end of the mineralization reactor. The mineral concentration sensor is communicatively connected to the control system to monitor the mineral content in the mineralized water.

10. The integrated drinking water filtration and preparation system according to claim 2, characterized in that, The coarse filter is equipped with a turbidity sensor at its outlet, which is communicatively connected to the control system to monitor the turbidity of the water after coarse filtration.

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