Water quality membrane purification filter element and water purifier

Abstract

The application relates to the technical field of water quality purification, and discloses a water quality membrane purification filter core and a water purifier, which comprise a shell, an upper cover is threadedly connected to the top of the shell, a raw water pipe is arranged on the middle part of the upper surface of the upper cover, three split petals are arranged on the middle part of the inner wall of the shell, each edge petal is fixedly connected with the inner wall of the shell, a filter assembly is arranged between each two split petals, the filter assembly comprises three core bodies which are uniformly arranged on the three split petals in a circumferential direction, a raw water window is arranged on the upper surface of each core body close to the central part of the shell, a water pipe is arranged on the bottom surface of each core body close to one side of the inner wall of the shell, and an arc-shaped plate is fixedly connected to the other end of the water pipe and passes around the core body. The valve disc, the differential pressure switching assembly and the hydraulic impeller are integrated into one body, so that the function conversion of "filtration - blockage sensing - automatic switching" is realized.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, and in particular to a water membrane purification filter element and a water purifier. Background Technology

[0002] As a core component of water purifiers, the water purification filter cartridge's structural design directly affects filtration efficiency, lifespan, and ease of user maintenance. Most common water purification filter cartridges on the market use a snap-on or integrated packaging structure. After connecting to the internal piping of the water purifier, users typically can only replace the entire filter cartridge assembly during daily use, making it difficult to clean the internal parts or perform separate maintenance. During the filtration process, suspended solids, colloids, and particulate impurities in the water gradually accumulate on the filter cartridge surface. Over time, this can easily form a filter cake layer, leading to increased filtration resistance, reduced water flow rate, and the need for regular filter cartridge replacement to maintain the water purification effect.

[0003] A search revealed Chinese patent CN119349813A, which discloses a filter assembly and a water purifier. The filter assembly includes a water circuit board, a pretreatment filter, a reverse osmosis filter, a three-way valve, a pressure tank, and a one-way valve. The water circuit board includes a plate body, multiple filter mounting seats, and water circuit components. The central axis of the multiple filter mounting seats defines a central axial surface. Each mounting seat includes a first mounting seat and a second mounting seat. The pretreatment filter is coaxially mounted with the first mounting seat, and the reverse osmosis filter is coaxially mounted with the second mounting seat. The three-way valve is located on one side of the central axial surface. The first inlet of the three-way valve is connected to the outlet of the pretreatment filter via a water circuit, and the outlet of the three-way valve is connected to the inlet of the reverse osmosis filter via a water circuit. The pressure tank is connected to the outlet of the reverse osmosis filter and the second inlet of the three-way valve via a water circuit. This application's technical solution fully utilizes the space on both sides of the central axial surface of the water circuit board, reducing the volume of the water purifier. However, in practical use, this solution still has the following shortcomings:

[0004] Existing filter cartridges cannot automatically detect blockage and switch to a backup unit to continue water supply when the filter unit becomes clogged, affecting filtration continuity. Clogged filter cartridges lack online self-cleaning capabilities, leading to continuous accumulation of contaminants that accelerates performance degradation and shortens cartridge lifespan. Furthermore, direct discharge of backwash wastewater results in water waste.

[0005] Therefore, it is necessary to design a water quality membrane purification filter and a water purifier to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a water quality membrane purification filter cartridge and a water purifier.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A water quality membrane purification filter element includes a shell, a top cover is threadedly connected to the top of the shell, a raw water pipe is provided in the middle of the upper surface of the top cover, and three partitions are provided in the middle of the inner wall of the shell, with each partition fixedly connected to the inner wall of the shell, and a filter component is provided between each of the three partitions.

[0009] The filter assembly includes three cores evenly distributed in a circle on the three-lobed partition. The upper surface of the core is provided with a raw water window near the center of the outer shell, and a purified water pipe is provided on the bottom surface of the core near the inner wall of the outer shell. The other end of the purified water pipe is fixedly connected to an arc-shaped plate around the core.

[0010] The upper surfaces of the three cores are rotatably connected to valve discs. The lower surface edge of the valve discs is provided with a convex annular groove, and the arc-shaped plates connected to one end of the three water purification pipes are movably connected in the convex annular groove. The surface of the convex annular groove is provided with a water purification window, and the water purification window penetrates the valve disc.

[0011] The valve disc has a raw water tank on its lower surface, and the raw water tank corresponds to the raw water window on the upper surface of the core.

[0012] The surface of the upper cover facing the valve disc is provided with a water purification inner cavity ring, and the lower surface of the water purification inner cavity ring is provided with three inlet slots evenly distributed around the circumference.

[0013] A water collection trough is provided in the middle of the valve disc, and the water collection trough is connected to the original water trough.

[0014] The upper cover is equipped with a differential pressure switching component.

[0015] As a preferred embodiment of the present invention, the core body has a side groove on the side facing the inner wall of the outer shell, and the water purification pipe is embedded in the side groove.

[0016] As a preferred embodiment of the present invention, a water outlet pipe is provided on one side of the upper surface of the cover, and one end of the water outlet pipe penetrates the cover and extends into the inner ring of the water purification cavity.

[0017] As a preferred embodiment of the present invention, the differential pressure switching assembly includes a piston cylinder mounted on one side of the upper cover. A clean water pressure guide pipe is connected to the upper port of the piston cylinder, and a raw water pressure guide pipe is connected to the lower side of the piston cylinder. A separator plug is movably connected to the inner wall of the piston, and a support spring is provided between the separator plug and the bottom end of the inner wall of the piston. A push rod is fixedly connected to the bottom end of the separator plug, and a convex rod is fixedly connected to the bottom end of the push rod through the piston cylinder.

[0018] The valve disc surface is provided with an inner ring groove, which is located on the outer ring of the water collection tank. The bottom surface of the inner ring groove is provided with three inclined grooves evenly distributed around the circumference, and a limiting groove corresponding to the convex rod is provided at the end of the inclined groove.

[0019] A reflux flushing assembly is provided on one side of the raw water pipe.

[0020] As a preferred embodiment of the present invention, a speed reducer is mounted on the bottom of the inner wall of the water collection tank, a fixed shaft is fixedly connected to the input end of the speed reducer, an impeller is mounted on the middle of the upper surface of the fixed shaft, a positioning frame is movably mounted on the upper end of the fixed shaft, and the upper end of the positioning frame is fixedly mounted on the lower end of the inner wall of the raw water pipe.

[0021] As a preferred embodiment of the present invention, the other end of the water purification pressure guide pipe is installed on the outer wall of the water outlet pipe, and the other end of the raw water pressure guide pipe is installed on the outer wall of the raw water pipe.

[0022] As a preferred embodiment of the present invention, the backflow flushing assembly includes a drain window opened on the surface of the valve disc and located between the water collection tank and the inner ring groove. A backflow inlet groove is opened on one side of the lower surface of the valve disc, and an inner guide groove is opened between the backflow inlet groove and the water collection tank. A backflow groove window is provided on the upper surface of each of the three cores.

[0023] The lower surface of the upper cover is provided with a sewage inner cavity ring, and the lower surface of the sewage inner cavity ring is provided with a number of guide holes evenly distributed around the circumference;

[0024] A retention groove is provided on one side of the lower surface of the valve disc, and a blocking magnetic block is mounted on the backflow slot window of one of the cores.

[0025] As a preferred embodiment of the present invention, a Venturi tube is installed in the middle of the raw water pipe, a T-shaped pipe is installed on one side of the Venturi tube, and a filter cylinder is installed on the other side of the T-shaped pipe.

[0026] As a preferred embodiment of the present invention, a drain pipe is fixedly connected to the upper surface of the cover, and the bottom end of the drain pipe penetrates the cover and is located in the inner ring of the sewage cavity, while the top end of the drain pipe is mounted on the bottom of the filter cylinder.

[0027] A water purifier includes a water membrane purification filter element as described in any one of claims 1 to 9.

[0028] The present invention has the following beneficial effects:

[0029] 1. This invention integrates the valve disc, differential pressure switching component and hydraulic impeller into one unit, realizing a complete functional chain of "filtration - blockage detection - automatic switching". It directly converts the change of filtration resistance into mechanical switching action without any electrical components or external intervention, realizing passive automatic rotation of filter element working units and ensuring the continuity of filtration.

[0030] 2. This invention utilizes the system's own high-pressure raw water as a backwashing power source through the coordinated layout of the backwash inlet tank, inner guide tank and drain window on the valve disc. While continuously filtering, it simultaneously cleans and regenerates the clogged unit without stopping the water supply or disassembling the filter element. This achieves parallel operation of filtration and self-cleaning, effectively delaying the overall performance degradation of the filter element.

[0031] 3. This invention combines the Chinese-made Tube, filter cylinder and T-shaped pipe in the backwashing component to purify the wastewater generated by backwashing and reintroduce it into the filtration cycle, thereby realizing the recycling of water resources and reducing wastewater discharge. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of a water quality membrane purification filter element proposed in this invention;

[0033] Figure 2 This is a schematic diagram of the structure of a water quality membrane purification filter element with the top cover and valve disc removed, as proposed in this invention.

[0034] Figure 3 This is a schematic diagram of the core structure of a water quality membrane purification filter element proposed in this invention;

[0035] Figure 4 This is a schematic diagram of the valve disc structure in a water membrane purification filter element proposed in this invention. Figure 1 ;

[0036] Figure 5 This is a schematic diagram of the valve disc structure in a water membrane purification filter element proposed in this invention. Figure 2 ;

[0037] Figure 6 This is a schematic diagram of the valve disc structure in a water membrane purification filter element proposed in this invention. Figure 3 ;

[0038] Figure 7 This is a schematic diagram of a half-section of the valve disc in a water quality membrane purification filter element proposed in this invention.

[0039] Figure 8 This is a schematic diagram of the structure of the upper cover in a water membrane purification filter element proposed in this invention. Figure 1 ;

[0040] Figure 9 This is a schematic diagram of the structure of the upper cover in a water membrane purification filter element proposed in this invention. Figure 2 ;

[0041] Figure 10 This is a schematic diagram of a half-section of the upper cover in a water quality membrane purification filter element proposed in this invention.

[0042] Figure 11This is a schematic diagram of a half-section of the piston cylinder in a water membrane purification filter element proposed in this invention.

[0043] In the diagram: 1. Outer shell; 2. Top cover; 3. Filter assembly; 301. Core; 302. Purified water pipe; 303. Side groove; 304. Raw water window; 305. Arc-shaped plate; 306. Convex annular groove; 307. Valve disc; 308. Water collection tank; 309. Purified water window; 310. Raw water tank; 311. Purified water inner ring; 312. Water outlet pipe; 313. Inlet groove window; 4. Differential pressure switching assembly; 401. Inner annular groove; 402. Inclined groove; 403. Raw water pressure guiding pipe; 404. Piston cylinder; 405. Impeller; 406. Positioning frame; 407. Fixed shaft; 408, dividing plug; 409, support spring; 410, push rod; 411, convex rod; 412, limiting groove; 413, clean water pressure guide pipe; 414, deceleration disc; 5, raw water pipe; 6, three-lobed dividing valve; 7, backflow flushing assembly; 701, backflow trough window; 702, sewage discharge window; 703, backflow inlet trough; 704, inner guide groove; 705, venturi tube; 706, sewage inner ring; 707, guide hole; 708, sewage discharge pipe; 709, filter cartridge; 710, tee pipe; 711, blocking magnetic block; 712, retention groove. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0045] Example 1, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10A water quality membrane purification filter element includes a housing 1, with a top cover 2 threadedly connected to the top of the housing 1. A raw water pipe 5 is provided in the middle of the upper surface of the top cover 2. A three-lobed partition 6 is provided in the middle of the inner wall of the housing 1, and each side lobe is fixedly connected to the inner wall of the housing 1. A filter assembly 3 is provided between the three-lobed partitions 6. The filter assembly 3 includes three cores 301 evenly distributed in a circle on the three-lobed partitions 6. The three-lobed partitions 6 divide the housing 1 into three equal fan-shaped spaces to store the three cores 301 for raw water filtration. A raw water window 304 is provided on the upper surface of the core 301 near the center of the housing 1, and a purified water pipe 302 is provided on the bottom surface of the core 301 near the inner wall of the housing 1. The other end of the purified water pipe 302 passes around the core 301 and is fixedly connected to an arc-shaped... The upper surface of the plate 305 and the three cores 301 are rotatably connected to the valve disc 307. The lower surface edge of the valve disc 307 is provided with a convex annular groove 306. The arc plate 305 connected to one end of the three water purification pipes 302 is movably connected in the convex annular groove 306. The surface of the convex annular groove 306 is provided with a water purification window 309, which penetrates the valve disc 307. The lower surface of the valve disc 307 is provided with a raw water tank 310, which corresponds to the raw water window 304 on the upper surface of the core 301. The surface of the upper cover 2 facing the valve disc 307 is provided with a water purification inner cavity ring 311, and the lower surface of the water purification inner cavity ring 311 is provided with three inlet slot windows 313 evenly distributed around the circumference. The middle part of the valve disc 307 is provided with a water collection tank 308, which is connected to the raw water tank 310.

[0046] Furthermore, such as Figure 2 , Figure 3 , Figure 8 and Figure 9 The core 301 has a side groove 303 on the side facing the inner wall of the outer shell 1, and the water purification pipe 302 is embedded in the side groove 303. The upper surface of the upper cover 2 is provided with a water outlet pipe 312, and one end of the water outlet pipe 312 passes through the upper cover 2 and extends into the water purification inner cavity ring 311.

[0047] In this embodiment, during use, raw water enters the water collection tank 308 in the middle of the valve disc 307 from the raw water pipe 5, flows through the raw water tank 310 to the raw water window 304 on the upper surface of the current working core 301, and enters the core 301 for filtration. The filtered clean water rises from the clean water pipe 302 at the bottom of the core 301, enters the convex annular groove 306 on the lower surface of the valve disc 307 through the arc plate 305, then passes through the clean water window 309 into the clean water inner cavity ring 311 of the upper cover 2, and finally flows into the outlet pipe 312 through the inlet slot window 313 for discharge. The clean water pipe 302 is embedded in the side groove 303 on the side wall of the core 301, saving space and protecting the pipeline. The three-lobed separator 6 divides the interior of the outer shell 1 into three independent chambers, and each core 301 does not interfere with the others. The rotation of the valve disc 307 realizes the filtration rotation between different cores 301.

[0048] Example 2 further optimizes the water quality membrane purification filter element provided in Example 1, such as... Figure 4 , Figure 6 , Figure 8 , Figure 9 and Figure 11 As shown, a differential pressure switching assembly 4 is provided in the upper cover 2. The differential pressure switching assembly 4 includes a piston cylinder 404 mounted on one side of the upper cover 2. A purified water pressure guide pipe 413 is connected to the upper port of the piston cylinder 404, and a raw water pressure guide pipe 403 is connected to the lower side of the piston cylinder 404. A separator plug 408 is movably connected to the inner wall of the piston cylinder 404, and a support spring 409 is mounted between the separator plug 408 and the bottom end of the inner wall of the piston cylinder 404. A pusher is fixedly connected to the bottom end of the separator plug 408. The bottom end of the push rod 410 passes through the piston cylinder 404 and is fixedly connected to a convex rod 411. The valve disc 307 has an inner ring groove 401 on its surface, which is located on the outer ring of the water collection tank 308. The bottom surface of the inner ring groove 401 has three evenly distributed inclined grooves 402, and a limiting groove 412 corresponding to the convex rod 411 is provided at the end of the inclined grooves 402. In the initial locked state, the bottom end of the convex rod 411 is embedded in the limiting groove 412. Inside, the valve disc 307 is circumferentially limited, preventing it from rotating under the impact of water flow. When the separator plug 408 moves upward due to the increased pressure difference and overcomes the elastic force of the support spring 409, the push rod 410 drives the convex rod 411 to rise vertically, causing the bottom end of the convex rod 411 to completely disengage from the limiting groove 412. The valve disc 307 then enters a free rotation state. After the valve disc 307 rotates approximately 120° under hydraulic drive, the bottom end of the convex rod 411 moves along the bottom surface of the inner annular groove 401. The inclined groove 402 slides, and the inclined groove 402 gradually slopes down from the starting end to the end. When the convex rod 411 slides to the limit groove 412 at the end of the inclined groove 402, the pressure difference has dropped. The separator plug 408 moves downward under the restoring force of the support spring 409. The push rod 410 drives the convex rod 411 to fall vertically. The bottom end of the convex rod 411 is embedded into the corresponding limit groove 412 again, so that the valve disc 307 is automatically locked at a new angle.

[0049] Furthermore, such as Figure 6 and Figure 9 A speed reducer 414 is mounted on the bottom of the inner wall of the water collection tank 308. A fixed shaft 407 is fixedly connected to the input end of the speed reducer 414. An impeller 405 is mounted on the middle of the upper surface of the fixed shaft 407. A positioning frame 406 is movably mounted on the upper end of the fixed shaft 407, and the upper end of the positioning frame 406 is fixedly mounted on the lower end of the inner wall of the original water pipe 5.

[0050] Furthermore, such as Figure 8 and Figure 9 The other end of the purified water pressure guide pipe 413 is installed on the outer wall of the outlet pipe 312, and the other end of the raw water pressure guide pipe 403 is installed on the outer wall of the raw water pipe 5.

[0051] In this embodiment, during use, when the filter membrane of the working core 301 gradually becomes clogged, the pressure on the raw water side increases and the pressure on the purified water side decreases. The raw water pressure guide pipe 403 introduces high-pressure raw water into the lower end of the piston cylinder 404, and the purified water pressure guide pipe 413 introduces low-pressure purified water into the upper end of the piston cylinder 404. Under the action of the increased pressure difference, the separator plug 408 overcomes the resistance of the support spring 409 and moves upward, driving the push rod 410 to move upward. The convex rod 411 at the bottom of the push rod 410 then disengages from the limiting groove 412 on the inner ring groove 401 of the valve disc 307, and the valve disc 307 unlocks. At this time, the raw water pipe 5 flows into the collection... The water flow in the water tank 308 impacts the impeller 405 to rotate. The impeller 405 transmits torque to the valve disc 307 through the fixed shaft 407 and the reduction disc 414, driving the valve disc 307 to rotate. After the valve disc 307 rotates 120°, the convex rod 411 slides into the next limiting groove 412 along the inclined groove 402 on the bottom surface of the inner ring groove 401, relocking the valve disc 307. The new core 301 takes over the filtration, the system pressure difference drops, and the separator plug 408 resets downward under the action of the support spring 409, waiting for the next trigger. The positioning frame 406 ensures the stability of the rotation axis of the impeller 405 and the fixed shaft 407.

[0052] Example 3 further optimizes the water quality membrane purification filter element provided in Examples 1 and 2, such as... Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, a backflow flushing assembly 7 is provided on one side of the raw water pipe 5. The backflow flushing assembly 7 includes a drain window 702 opened on the surface of the valve disc 307 and located between the water collection tank 308 and the inner ring groove 401. A backflushing water inlet groove 703 is opened on one side of the lower surface of the valve disc 307, and an inner guide groove 704 is opened between the backflushing water inlet groove 703 and the water collection tank 308. A sewage inner cavity ring 706 is mounted on the lower surface of the upper cover 2. Several guide holes 707 are evenly distributed on the lower surface of the sewage inner cavity ring 706. A retention groove 712 is opened on one side of the lower surface of the valve disc 307. In the initial state, it is in the first positive rotation. The core 301 at the end of the rotating part has a backflush slot 701 with a blocking magnetic block 711 installed on it. The retention slot 712 is a groove opened on the lower surface of the valve disc 307, and a permanent magnet is embedded in the bottom of the slot. When the valve disc 307 rotates for the first time to put the core 301 with the blocking magnetic block 711 in the standby position, the blocking magnetic block 711 is opposite to the permanent magnet in the retention slot 712. Under the magnetic attraction, the blocking magnetic block 711 is detached from the backflush slot 701 of the core 301 and is attracted and fixed in the retention slot 712, thereby exposing the backflush slot 701 of the core 301 and opening the backflush channel.

[0053] Furthermore, such as Figure 8and Figure 9 A venturi tube 705 is installed in the middle of the raw water pipe 5. A tee pipe 710 is installed on one side of the venturi tube 705, and a filter cylinder 709 is installed on the other side of the tee pipe 710. The filter cylinder 709 contains a filter medium to intercept particulate impurities that are detached from the backwash wastewater. The outlet of the filter cylinder 709 is connected to the throat of the venturi tube 705 via the tee pipe 710. When the raw water passes through at a set flow rate, a negative pressure lower than atmospheric pressure is generated at the throat. This negative pressure is sufficient to overcome the flow resistance in the tee pipe 710 and the filter cylinder 709, continuously drawing in the filtered clear liquid, which mixes with the mainstream raw water and enters the collection tank 308 together. This achieves closed-loop recycling of backwash water without the aid of external power.

[0054] Furthermore, such as Figure 1 , Figure 9 and Figure 10 A drain pipe 708 is fixedly connected to the upper surface of the cover 2, and the bottom end of the drain pipe 708 passes through the cover 2 and is located in the sewage inner cavity ring 706. The top end of the drain pipe 708 is mounted on the bottom of the filter cylinder 709.

[0055] In this embodiment, during use, when the valve disc 307 is locked in a certain working position, a portion of the raw water in the water collection tank 308 is diverted through the inner guide channel 704 into the backwash water inlet tank 703. At this time, the backwash water inlet tank 703 is aligned with the backwash window 701 of the blocked core 301. High-pressure raw water is injected into the clean water side of the core 301 from the backwash window 701, penetrating from the inside to the outside of the filter membrane for backwashing, removing impurities that are blocked on the outer surface of the membrane. The wastewater generated during rinsing flows out from the raw water window 304 of the core 301, enters the wastewater inner cavity ring 706 of the upper cover 2 through the drain window 702 on the valve disc 307, and then flows into the drain pipe 708 through the guide hole 707. The drain pipe 708 guides the wastewater into the filter cartridge 709 for filtration. After the filter cartridge 709 intercepts larger impurities in the sewage, the filtered water flows through the three-way pipe 710 to the throat of the venturi tube 705. The venturi tube 705 uses the negative pressure generated when the raw water passes through at high speed to draw in the filtered water and mix it with the new raw water, and then enters the water collection tank 308 again to realize the internal circulation of backwash water. In the initial state, the blocking magnetic block 711 is installed on the backwash slot window 701 of the core 301 at the end of the first round of forward rotation. The core has not yet participated in filtration. The blocking magnetic block 711 blocks the backwash water from entering its clean water side. When the valve disc 307 switches for the first time and turns the core to the standby position, the blocking magnetic block 711 is attracted into the retention groove 712 on the lower surface of the valve disc 307 and locked, and the backwash channel is opened from then on.

[0056] Example 4: A water purifier that includes the functions described in the above-described water membrane purification filter cartridge example.

[0057] The water quality membrane purification filter element and water purifier provided by this invention are used as follows:

[0058] Before use, tighten the outer shell 1 and the upper cover 2. The valve disc 307 is locked in the limiting groove 412 by the convex rod 411. The three cores 301 are in the state of waiting to be filtered, standby and protected respectively. The blocking magnetic block 711 is installed on the backwash slot window 701 of the protected core 301 to prevent backwash water from entering the core. The raw water pipe 5 is connected to the water source and the outlet pipe 312 is connected to the water-using end.

[0059] After water is supplied, raw water enters from the raw water pipe 5, passes through the Venturi tube 705 to the water collection tank 308 of the valve disc 307, and flows into the raw water window 304 of the currently working core 301 through the raw water tank 310. The water then enters the core and, under pressure, passes through the filter membrane of the core 301. Impurities are trapped on the outer surface of the membrane, while purified water seeps into the inner side of the membrane. It then rises through the purified water pipe 302 at the bottom of the core 301, passes through the arc plate 305, and enters the convex annular groove of the valve disc 307. 306, then through the clean water window 309 to the clean water inner cavity ring 311 of the upper cover 2, and finally through the inlet slot window 313 to flow out into the outlet pipe 312. At this stage, the filter membrane is clean, the pressure difference between the raw water side and the clean water side is small, the separator plug 408 is at the upper stop point under the action of the support spring 409, the convex rod 411 is inserted into the limiting groove 412, the valve disc 307 remains locked, although the water flow in the water collection tank 308 continues to impact the impeller 405, the impeller 405 does not rotate because the valve disc 307 is locked.

[0060] As filtration continues, impurities gradually accumulate on the surface of the filter membrane of the working core 301, increasing the flow resistance. The pressure on the raw water side gradually increases, while the pressure on the purified water side gradually decreases, resulting in a continuous increase in the pressure difference between the two sides. This pressure difference is transmitted to the lower end of the piston cylinder 404 via the raw water pressure guide pipe 403 and to the upper end of the piston cylinder 404 via the purified water pressure guide pipe 413. When the pressure difference overcomes the force of the supporting spring 409, the separator plug 408 is pushed upward, causing the push rod 410 and the convex rod 411 to move upward. The convex rod 411 disengages from the limiting groove 412, and the valve disc 307 is unlocked.

[0061] After the valve disc 307 is unlocked, the water flow continuously impacting the impeller 405 in the water collection tank 308 drives the impeller 405 to rotate. The impeller 405 drives the valve disc 307 to rotate through the fixed shaft 407 and the reduction disc 414. During the rotation of the valve disc 307, the raw water tank 310 disengages from the raw water window 304 of the current core 301 and turns to the raw water window 304 of the next core 301. After the next core 301 is connected, the raw water enters the clean filter membrane, the pressure on the raw water side drops immediately, the pressure difference decreases, and the convex rod 411 falls back and slides into the next limiting groove 412 along the inclined groove 402 on the bottom surface of the inner ring groove 401. After the valve disc 307 rotates 120°, it locks again. After switching, the core 301 starts filtering. Before switching, the core 301 stops water intake, and the separator plug 408 is reset under the action of the support spring 409, waiting for the next trigger.

[0062] After valve disc 307 is locked, backwashing starts simultaneously. Part of the raw water in collection tank 308 is diverted through inner guide channel 704 and enters backwash inlet tank 703. Backwash inlet tank 703 is then aligned with backwash window 701 of the clogged core 301. High-pressure raw water is injected in reverse through backwash window 701, penetrating from the inside to the outside of the filter membrane, removing impurities clogging the outer surface of the membrane. Wastewater generated during rinsing flows out through raw water window 304 of the core 301. The wastewater enters the sewage inner ring 706 of the upper cover 2 through the sewage discharge window 702 on the valve disc 307, then flows into the sewage discharge pipe 708 through the guide hole 707, and is discharged into the filter cylinder 709. After the filter cylinder 709 intercepts larger impurities in the sewage, the filtered water flows through the three-way pipe 710 to the venturi tube 705. The throat of the venturi tube 705 generates negative pressure due to the high speed of the raw water passing through, which draws in the return liquid and mixes it with the new raw water, and then enters the water collection tank 308 again to achieve recycling.

[0063] The three cores 301 work in turn. In the initial state, the core 301 at the end of the first round of forward rotation has a blocking magnetic block 711 on its backwash slot window 701. This core 301 has not yet participated in filtration. The blocking magnetic block 711 prevents backwash water from entering its clean water side. When the valve disc 307 switches for the first time and turns the core 301 to the standby position, the blocking magnetic block 711 is attracted into the retention groove 712 on the lower surface of the valve disc 307 and locked. The backwash channel is then opened. After the valve disc 307 switches again, the core 301 enters the filtration position and begins normal filtration. After that, its backwash function is performed normally.

[0064] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A water quality membrane purification filter element, comprising a housing (1), wherein a top cover (2) is threadedly connected to the top of the housing (1), and a raw water pipe (5) is provided in the middle of the upper surface of the top cover (2), characterized in that, The inner wall of the outer shell (1) is provided with three-lobed partitions (6) in the middle, and each side lobe is fixedly connected to the inner wall of the outer shell (1). A filter assembly (3) is provided between the three-lobed partitions (6). The filter assembly (3) includes three cores (301) evenly distributed in a circle on the three-lobed partition (6). The upper surface of the core (301) near the center of the outer shell (1) is provided with a raw water window (304), and a purified water pipe (302) is provided on the bottom surface of the core (301) near the inner wall of the outer shell (1). The other end of the purified water pipe (302) is fixedly connected to an arc plate (305) around the core (301). A valve disc (307) is rotatably connected to the upper surface of the three cores (301). A convex annular groove (306) is provided on the lower edge of the valve disc (307). An arc plate (305) connected to one end of the three water purification pipes (302) is movably connected in the convex annular groove (306). A water purification window (309) is provided on the surface of the convex annular groove (306), and the water purification window (309) penetrates the valve disc (307). The valve disc (307) has a raw water tank (310) on its lower surface, and the raw water tank (310) corresponds to the raw water window (304) on the upper surface of the core (301); The upper cover (2) is provided with a water purification inner cavity ring (311) on the surface facing the valve disc (307), and the lower surface of the water purification inner cavity ring (311) is provided with three inlet slots (313) evenly distributed around the circumference. A water collection trough (308) is provided in the middle of the valve disc (307), and the water collection trough (308) is connected to the original water trough (310); The upper cover (2) is provided with a differential pressure switching component (4).

2. The water quality membrane purification filter element according to claim 1, characterized in that, The core (301) has a side groove (303) on the side facing the inner wall of the outer shell (1), and the water purification pipe (302) is embedded in the side groove (303).

3. The water quality membrane purification filter element according to claim 1, characterized in that, A water outlet pipe (312) is mounted on one side of the upper surface of the cover (2), and one end of the water outlet pipe (312) passes through the cover (2) and extends into the inner ring (311) of the water purification cavity.

4. The water quality membrane purification filter element according to claim 1, characterized in that, The differential pressure switching assembly (4) includes a piston cylinder (404) mounted on one side of the upper cover (2). The upper port of the piston cylinder (404) is connected to a purified water pressure guide pipe (413), and the lower side of the piston cylinder (404) is connected to a raw water pressure guide pipe (403). A separator plug (408) is movably connected to the inner wall of the piston cylinder (404), and a support spring (409) is mounted between the separator plug (408) and the bottom end of the inner wall of the piston cylinder (404). A push rod (410) is fixedly connected to the bottom end of the separator plug (408), and a convex rod (411) is fixedly connected to the bottom end of the push rod (410) through the piston cylinder (404). The valve disc (307) has an inner ring groove (401) on its surface, and the inner ring groove (401) is located on the outer ring of the water collection tank (308). The bottom surface of the inner ring groove (401) has three inclined grooves (402) evenly distributed around its circumference, and a limiting groove (412) corresponding to the convex round rod (411) is provided at the tail of the inclined groove (402). A reflux flushing assembly (7) is provided on one side of the raw water pipe (5).

5. A water quality membrane purification filter element according to claim 4, characterized in that, A speed reducer (414) is mounted on the bottom of the inner wall of the water collection tank (308). A fixed shaft (407) is fixedly connected to the input end of the speed reducer (414). An impeller (405) is mounted on the middle of the upper surface of the fixed shaft (407). A positioning frame (406) is movably mounted on the upper end of the fixed shaft (407), and the upper end of the positioning frame (406) is fixedly mounted on the lower end of the inner wall of the raw water pipe (5).

6. A water quality membrane purification filter element according to claim 5, characterized in that, The other end of the purified water pressure guide pipe (413) is installed on the outer wall of the water outlet pipe (312), and the other end of the raw water pressure guide pipe (403) is installed on the outer wall of the raw water pipe (5).

7. A water quality membrane purification filter element according to claim 6, characterized in that, The backflow flushing assembly (7) includes a drain window (702) opened on the surface of the valve disc (307), and the drain window (702) is located between the water collection tank (308) and the inner ring groove (401). A backflow inlet groove (703) is opened on one side of the lower surface of the valve disc (307), and an inner guide groove (704) is opened between the backflow inlet groove (703) and the water collection tank (308). The upper surfaces of the three cores (301) are all provided with backflow groove windows (701). The lower surface of the upper cover (2) is provided with a sewage inner cavity ring (706), and the lower surface of the sewage inner cavity ring (706) is provided with a number of guide holes (707) evenly distributed around the circumference. A retention groove (712) is provided on one side of the lower surface of the valve disc (307), and a blocking magnetic block (711) is mounted on the backflow groove window (701) of one of the cores (301).

8. A water quality membrane purification filter element according to claim 6, characterized in that, A venturi pipe (705) is installed in the middle of the raw water pipe (5), a tee pipe (710) is installed on one side of the venturi pipe (705), and a filter cylinder (709) is installed on the other side of the tee pipe (710).

9. A water quality membrane purification filter element according to claim 8, characterized in that, The upper surface of the cover (2) is fixedly connected to a drain pipe (708), and the bottom end of the drain pipe (708) passes through the cover (2) and is located in the sewage inner ring (706). The top end of the drain pipe (708) is mounted on the bottom of the filter cylinder (709).

10. A water purifier, characterized in that, Includes the water membrane purification filter element as described in any one of claims 1-9.

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