Pollution-proof water purifier

Abstract

The utility model discloses a kind of anti-pollution water purifiers, comprising: along the water flow direction series connection front processing filter core subassembly, reverse osmosis filter core subassembly, rear filter core subassembly, the rear filter core subassembly includes filter cartridge shell and internally sleeved inner shell area, the bottom of the inner shell area is provided with fluid isolation tank, the fluid isolation tank is communicated with the filter core internal passage in the upper portion of the inner shell area by the axial flow guide duct.The collaborative structure of fluid isolation tank and axial flow guide duct is integrated in the rear filter core of water purifier, completely eliminates the secondary pollution risk of filter core bottom water breeding, and prolongs the service life of filter core.

Description

Technical Field

[0001] This utility model relates to the field of water purifier technology, specifically to a pollution-proof water purifier. Background Technology

[0002] Despite the widespread use of water purifiers and continuous technological advancements, several significant shortcomings remain, severely hindering performance improvements and user experience optimization. In some models using traditional cartridge filters, water can accumulate at the bottom of the post-filter during use, preventing complete drainage. This accumulation can lead to bacterial growth, affecting not only the purified water quality and reducing the purifier's effectiveness but also shortening the filter's lifespan. Furthermore, existing water purifier circulation systems suffer from inadequate outlet design, failing to effectively isolate the stored water. This results in purified water mixing with potential contaminants, re-contaminating the purified water and preventing the purifier from providing truly clean and safe drinking water.

[0003] In terms of water purification system control, there are certain limitations. Water purifiers rely solely on timed flushing to extend the lifespan of the RO (reverse osmosis) circuit and reduce contamination. However, this method is too mechanical and simplistic, failing to adapt flexibly to the actual usage frequency. For example, if usage is infrequent, timed flushing wastes water; conversely, during high usage, timely and effective cleaning is impossible, impacting purification efficiency. Furthermore, in actual installation and usage scenarios, low water pressure from the purifier is a common problem. Particularly in multi-story buildings, if the purifier is installed on the first floor to supply water to upper floors, insufficient water pressure often results in inadequate water supply for upstairs users, affecting their normal user experience.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this utility model is to provide a pollution-proof water purifier. By integrating a physically isolated water storage chamber and a closed-loop circulating sterilization water path at the bottom of the post-filter, the secondary pollution problem caused by water accumulation in the filter is completely solved, and the output water quality reaches a truly clean and safe drinking standard.

[0006] To achieve the above objectives, the present invention provides a pollution-proof water purifier, comprising: a pretreatment filter element assembly, a reverse osmosis filter element assembly, and a post-filter element assembly connected in series along the water flow direction. The post-filter element assembly includes a filter cartridge shell and an inner shell region fitted inside it. A fluid isolation box is provided at the bottom of the inner shell region. The fluid isolation box is connected to the internal channel of the filter element at the upper part of the inner shell region through an axial flow guide pipe.

[0007] Furthermore, the flow guide pipe is located in the fluid isolation box, and the bottom opening of the flow guide pipe is infinitely close to the bottom of the fluid isolation box.

[0008] Furthermore, the volume of the fluid isolation box accounts for 30%-35% of the total volume of the inner shell area, and it is fixedly connected to the filter element body using an elastic sealing assembly.

[0009] Furthermore, the ratio of the vertical distance from the bottom opening of the flow guide pipe to the bottom of the box to the height of the fluid isolation box is 1:500.

[0010] Furthermore, the bottom opening of the guide pipe is an obliquely cut opening arranged at an angle.

[0011] Furthermore, the angle between the cut surface of the oblique opening and the axis of the guide pipe is 40°-50°.

[0012] Furthermore, the elastic sealing assembly includes an annular sealing body, a sealing tape, and a socket fitting structure, wherein the socket fitting structure is a column at the bottom of the filter element and a stepped groove at the top of the fluid isolation box.

[0013] Furthermore, it also includes a pressure detection module, a fluid drive device, an ultraviolet sterilization device, and a terminal water outlet, which are sequentially connected to the post-filter assembly via a water purification pipeline.

[0014] Furthermore, the lower end of the terminal outlet is reconnected to the post-filter assembly via a one-way backflow valve.

[0015] Furthermore, it also includes an intelligent control system, which comprises: The data collection unit collects data from the pressure detection module and analyzes the purified water pressure in real time. The sterilization synergy unit synchronously drives the fluid drive device and the ultraviolet sterilization device during the water purification cycle to achieve fluid circulation sterilization. A rinsing unit is used to achieve real-time rinsing of the filter element assembly.

[0016] Compared with the prior art, the beneficial effects of this utility model are: This invention, through the precise cooperation of a fluid isolation box and a beveled flow guide pipe, constructs a physically isolated contamination control zone within the post-filter assembly. This prevents retained bacteria from spreading into the flowing water path, effectively avoiding problems such as water accumulation and contaminant residue that may occur in traditional designs. This significantly improves the stability of purified water quality and reduces the risk of contamination compared to traditional models. Simultaneously, the beveled flow guide design further optimizes water flow direction, allowing water to enter the guide pipe more smoothly, reducing water flow resistance and improving flow efficiency. Furthermore, the fluid isolation box and filter body are fixedly connected using an elastic sealing assembly consisting of a ring-shaped seal and a socket-fit structure. This sealing method not only provides a stable connection but also has good elasticity, effectively adapting to pressure changes under different operating conditions, preventing leakage, and ensuring the reliable operation of the water purifier.

[0017] Furthermore, an innovative pressure-linked control mechanism is adopted to regulate water pressure in real time and automatically activate the deep sterilization program, effectively killing bacteria and viruses in the water and further improving water quality safety. The lower end of the terminal outlet is reconnected to the post-filter assembly via a one-way backflow valve, forming a circulation loop. Combined with the flushing unit in the intelligent control system, this enables real-time flushing of the filter assembly, preventing filter contamination and extending its lifespan. Attached Figure Description

[0018] Figure 1 A filtration flow chart of a pollution-resistant water purifier provided for an embodiment of this utility model.

[0019] Figure label: 1-Pretreatment filter cartridge assembly, 2-Reverse osmosis filter cartridge assembly, 3-Post-filter cartridge assembly, 4-Fluid isolation box, 5-Flow guide pipe, 6-Filter cartridge, 7-Inner shell area, 8-Internal channel, 9-Pressure detection module, 10-Fluid drive device, 11-Ultraviolet sterilization device, 12-Terminal outlet, 13-Return water one-way backflow preventer valve, 14-Inlet solenoid valve, 15-Boost pump, 16-One-way valve, 17-Flushing solenoid valve, 18-Filter cartridge shell, 301-Inlet, 302-Outlet, 303-Return water outlet. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are only some embodiments of the present invention, not all embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical 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 invention based on the specific circumstances.

[0023] To more clearly illustrate the technical solutions in this invention, specific embodiments are described below.

[0024] Example Reference Figure 1As shown, this embodiment provides a pollution-preventing water purifier, which includes a pretreatment filter assembly 1, a reverse osmosis filter assembly 2, and a post-filter assembly 3 connected in sequence. The pretreatment filter assembly 1 uses a composite filter element as the starting point for water purification. Its outer layer effectively intercepts particulate matter and impurities in the water, such as silt, rust, and suspended solids, while the inner activated carbon layer deeply adsorbs organic pollutants and residual chlorine. Removing particulate impurities at the starting point prevents them from entering subsequent filter assemblies, thus preventing clogging and reducing filter lifespan. The reverse osmosis filter assembly 2, through the molecular-level separation characteristics of its internal RO filter element, deeply removes bacteria, viruses, heavy metal ions, and various organic pollutants from the water. The selective separation of the membrane allows for the efficient separation of most harmful substances from water molecules.

[0025] The inlet 301 of the post-filter assembly 3 is connected to the reverse osmosis filter assembly 2, receiving purified water from the reverse osmosis filter assembly 2. The post-filter assembly 3 includes a filter cartridge shell 18, inside which is an inner shell region 7. A fluid isolation box 4 is carefully set at the bottom of the inner shell region 7. The volume of the fluid isolation box 4 is specifically designed to occupy 30%-35% of the inner shell region 7. In this embodiment, it occupies 1 / 3 of the total volume of the inner shell region 7. This design ensures that the filtration effect of the filter element 6 in the post-filter assembly 3 is not affected. If the volume of the fluid isolation box 4 is too small, when the fluid drive device 10 is started in the standby state of the water purifier, the water flow will experience pressure fluctuations due to insufficient volume, affecting the stable operation of the equipment. The fluid isolation box 4 and the filter element 6 body are connected by an elastic sealing assembly. This assembly consists of an annular sealing body, sealing tape, and a socket fitting structure. Specifically, the column at the bottom of the filter element fits into the stepped groove at the top of the fluid isolation box 4. This connection method is not only tight and reliable, effectively preventing water leakage and avoiding damage to the post-filter assembly 3 and secondary pollution caused by leakage, but it is also equipped with a sealing ring containing antibacterial material. It can adapt to pressure changes under different working conditions and can deform accordingly to maintain a good sealing state and ensure the stable operation of the water purifier.

[0026] The fluid isolation box 4 is connected to the internal channel 8 of the filter element 6 in the upper part of the inner shell area 7 via an axial flow guide pipe 5. In this embodiment, the filter element 6 is an activated carbon filter element. The flow guide pipe 5 is located in the fluid isolation box 4, and its bottom opening is infinitely close to the bottom of the fluid isolation box 4. The vertical distance from the bottom opening of the flow guide pipe 5 to the bottom of the box is precisely calculated to the height of the fluid isolation box 4. This precise design of the bottom opening of the flow guide pipe 5 and the bottom of the fluid isolation box 4 allows water to enter the flow guide pipe 5 from the fluid isolation box 4 in the shortest path and in the smoothest way, greatly reducing the accumulation of water at the bottom of the box. This effectively avoids the sedimentation and growth of pollutants caused by poor water flow, and ensures that the filtered water can be efficiently delivered to the terminal outlet 12, which not only ensures the freshness and activity of the water flow, but also significantly improves the pressure stability of the water supply system.

[0027] Furthermore, the bottom opening of the guide pipe 5 is a beveled opening arranged at an angle. The angle between the cut surface of the beveled opening and the axial direction of the guide pipe is between 40° and 50°. In this embodiment, a 45° angle is used. This beveled opening design optimizes the water flow guidance, allowing the water to enter the guide pipe at a more suitable angle and speed, further reducing water flow resistance, improving water flow efficiency, ensuring that the water flows orderly in the post-filter assembly 3, preventing water flow turbulence, and thus better avoiding the re-contamination of water quality by pollutant residues.

[0028] In the overall configuration of the water purifier in this application, the outlet of the post-filter assembly 3 is sequentially connected to the pressure detection module 9, the fluid drive device 10, the ultraviolet sterilization device 11, and the terminal outlet 12 via a water purification pipeline. The pressure detection module 9 in this embodiment uses a pressure sensor, which can collect and analyze water purification pressure data in real time. This precise monitoring of pressure by the pressure detection module 9 provides information to the intelligent control system. When the water pressure is too high, it can damage the filter element and connecting pipeline in the filter assembly; when the water pressure is too low, it will affect the water purification effect and the water flow rate. The pressure detection module 9 can promptly detect abnormalities and feed them back to the intelligent control system so that appropriate adjustments can be made to ensure the stable operation of the water purifier.

[0029] The fluid drive device 10 provides powerful propulsion for the water flow within the water purifier of this application. In this embodiment, a circulating pump is used to ensure that the water flows along the set path and at the set speed. During the ultraviolet sterilization process, a suitable flow rate ensures sufficient contact between the water and the ultraviolet light, allowing each drop of water to undergo effective sterilization, improving the sterilization effect, and ensuring the hygiene and safety of the output water. The ultraviolet sterilization device 11 ensures the safety of the output water. In this embodiment, an ultraviolet germicidal lamp is used, utilizing the powerful sterilization ability of ultraviolet light to effectively eliminate bacteria and viruses in the water. During the water purification process, the ultraviolet sterilization device 11 works continuously, comprehensively sterilizing the passing water flow and providing healthier and safer drinking water.

[0030] The rear end of the terminal outlet 12 is connected to the return outlet 303 in the post-filter assembly 3 via a one-way backflow valve 13, forming a closed loop to ensure continuous water circulation within the water purifier. During water purification, the system simultaneously activates the ultraviolet sterilization device 11, continuously eliminating microorganisms in the water during circulation, completely preventing bacterial growth and reproduction within the pipes. In standby mode, the ultraviolet sterilization device 11 periodically activates the circulation sterilization function, effectively preventing bacterial growth and reproduction within the pipes. When water use is paused, the circulation structure automatically pushes excess water back into the fluid isolation tank 4 for temporary storage, avoiding unstable water supply caused by sudden pressure drops and ensuring that the water flow reaches a stable pressure instantly upon resumption of use. This circulation structure infuses the water purifier with vitality, keeping every drop of water fresh and clean during the purification process. It not only eliminates the common secondary pollution risks of traditional water purifiers but also ensures that even those on higher floors can enjoy the same strong water pressure as those on lower floors.

[0031] The intelligent control system, serving as the control center of the entire water purifier, includes a data collection unit, a sterilization coordination unit, and a flushing unit. The data collection unit receives data from the pressure detection module 9, monitors the water pressure in real time, and makes precise judgments based on preset parameter ranges. Upon detecting an abnormal pressure, it quickly sends signals to other units, initiating corresponding adjustment measures to ensure the water purifier remains in a stable operating state. The sterilization coordination unit synchronously drives the fluid drive device 10 and the ultraviolet sterilization device 11 during the water purification cycle, achieving coordinated water circulation and sterilization. This coordinated operation maximizes the sterilization effect and avoids sterilization dead zones. The flushing unit, initiated by the control system based on the water purifier's operating and standby times, appropriately activates the flushing program for the filter components. It precisely controls the flushing time and intensity, effectively removing impurities from the filter surface without over-flushing and damaging the filter, maintaining its good performance and ensuring the water purifier consistently outputs high-quality water.

[0032] The working process of this embodiment is as follows: When the user opens the terminal water outlet 12, the intelligent control system starts the water production program. The pre-filter assembly 1 first screens the tap water, and then the inlet solenoid valve 14 and the booster pump 15 send the pre-filtered water into the reverse osmosis filter assembly 2 for deep purification. The produced pure water is injected into the inlet 301 of the post-filter assembly 3 through the one-way valve 16, and after being processed by the filter element 6, it enters the fluid isolation tank 4. The fluid isolation tank can play a buffering role to ensure that the circulation pump 10 operates continuously at a constant pressure of 0.2MPa-0.3MPa in the closed pipeline. The water then flows out from the outlet 302 of the post-filter assembly 3, flows through the pressure sensor 9, the circulation pump 10, and the ultraviolet sterilization device 11 in sequence, and then is divided by a three-way valve: one part flows to the terminal water outlet 12 for user use, and the other part flows back to the return water outlet 303 of the post-filter assembly 3 through the return one-way valve 13, forming a closed-loop water circuit. Among them, the return water one-way backflow valve 13 blocks the backflow of unsterilized water to ensure the cleanliness of the water circuit, while the circulation pump 10 drives the water flow to continuously circulate and disinfect under the pressure stabilization support of the isolation box 4.

[0033] When the user opens the terminal water outlet 12, the intelligent control system is triggered to start the water production program. The pre-filter component 1 first screens the incoming tap water. Then, the pre-screened tap water is sent to the reverse osmosis filter component 2 for deep purification through the inlet solenoid valve 14 and the booster pump 15. The produced pure water is injected into the inlet 301 of the post-filter component 3 through the one-way valve 16. The water treated by the filter element 6 enters the fluid isolation tank 4 and then flows out from the outlet 302 of the post-filter component 3. It flows through the pressure sensor 9, the circulation pump, and the ultraviolet sterilization lamp in sequence. Then, it is divided by a three-way valve. Part of it flows to the terminal water outlet 12 for the user's use, and the other part flows back to the return water outlet 303 of the post-filter component 3 through the return one-way valve 13, forming a closed-loop water circuit. The return one-way valve 13 can block the backflow of unsterilized water to ensure the cleanliness of the water circuit. The water continues to flow and disinfect under the drive of the circulation pump.

[0034] In terms of the control logic of the intelligent control system of the water purifier, the water purifier will automatically or manually trigger corresponding operations according to different situations. When the pressure sensor detects that the pure water pressure is ≤0.1MPa, it will open the inlet solenoid valve 14 and start the booster pump 15 to start water production. At the same time, the circulation pump and ultraviolet sterilization lamp will start simultaneously until the pressure reaches ≥0.3MPa and then stop water production. This process can block the reverse osmosis of bacteria through pressure linkage. If the cumulative water production time exceeds 15 minutes and the machine stops, the flushing solenoid valve 17 will automatically open for 18 seconds to remove particles on the membrane surface. When the standby time exceeds 24 hours, the inlet solenoid valve 14, booster pump 15 and flushing solenoid valve 17 will first open for flushing for 30 seconds, and then start the circulation pump and ultraviolet sterilization lamp to run for 5 minutes. The residual water in the post-filter assembly 3 will be thoroughly replaced through deep flushing. According to tests, such circulation can reduce the total number of colonies in the pipeline from 520CFU / mL to 8CFU / mL. In addition, users can also manually control the flushing solenoid valve 17 through a smart terminal to start the circulation pump and ultraviolet sterilization lamp, flexibly ensuring the cleanliness of the water circuit.

[0035] This embodiment effectively solves the problems of easy contamination and insufficient water pressure in traditional water purifier post-filter systems by physically isolating water storage and dynamically closing-loop sterilization, combined with a pressure linkage control strategy. It significantly extends the filter life to 18 months and improves the water output stability in low-frequency use or long-distance water supply scenarios.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pollution-resistant water purifier, comprising a pretreatment filter assembly, a reverse osmosis filter assembly, and a post-filter assembly connected in series along the water flow direction, characterized in that, The post-filter assembly includes a filter cartridge outer shell and an inner shell region fitted inside. A fluid isolation box is provided at the bottom of the inner shell region, and the fluid isolation box is connected to the internal channel of the filter element at the top of the inner shell region through an axial flow guide pipe.

2. The pollution prevention water purifier according to claim 1, wherein The flow guide pipe is located in the fluid isolation box, and the bottom opening of the flow guide pipe is infinitely close to the bottom of the fluid isolation box.

3. The pollution-proof water purifier according to claim 1, characterized in that, The volume of the fluid isolation box accounts for 30%-35% of the total volume of the inner shell area, and it is fixedly connected to the filter element body by an elastic sealing assembly.

4. The pollution-proof water purifier according to claim 2, characterized in that, The vertical distance from the bottom opening of the flow guide pipe to the bottom of the box is 1:500 to the height of the fluid isolation box.

5. The pollution-proof water purifier according to claim 4, characterized in that, The bottom opening of the guide pipe is an obliquely cut opening arranged at an angle.

6. The pollution-free water purifier according to claim 5, characterized in that, The angle between the cut surface of the oblique opening and the axis of the guide pipe is 40°-50°.

7. The pollution-proof water purifier according to claim 3, characterized in that, The elastic sealing assembly includes an annular sealing body, a sealing tape, and a socket fitting structure, wherein the socket fitting structure consists of a column at the bottom of the filter element and a stepped groove at the top of the fluid isolation box.

8. The pollution-resistant water purifier according to any one of claims 1-7, characterized in that, It also includes a pressure detection module, a fluid drive device, an ultraviolet sterilization device, and a terminal water outlet, which are sequentially connected to the post-filter assembly via a water purification pipeline.

9. The pollution-proof water purifier according to claim 8, characterized in that, The lower end of the terminal outlet is reconnected to the post-filter assembly via a one-way backflow valve.

10. The pollution-proof water purifier according to claim 9, characterized in that, It also includes an intelligent control system, which includes: The data collection unit collects data from the pressure detection module and analyzes the purified water pressure in real time. The sterilization synergy unit synchronously drives the fluid drive device and the ultraviolet sterilization device during the water purification cycle to achieve fluid circulation sterilization. A rinsing unit is used to achieve real-time rinsing of the filter element assembly.

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