Filter element for multi-stage water purifier

Abstract

The invention relates to the technical field of filter elements of water purifiers, and discloses a filter element for a multi-stage water purifier, which comprises a top ring, filter layers are arranged at the bottom end of the top ring, according to the filter element for the multi-stage water purifier, a rotatable cleaning assembly is arranged between every two filter layers, and a water inlet distribution assembly communicated with the bottom of the cleaning assembly is combined; in this way, when the filter element needs to be cleaned, water is supplied through the water inlet distribution assembly, water for cleaning enters the cleaning assembly from the water inlet distribution assembly and is finally sprayed out from the long cleaning pipe, the long cleaning pipe is vertically arranged at the same height as the filter layer, and therefore the outer portion of the long cleaning pipe is inserted into the bottom of the filter element to drive the connecting rotating ring to rotate; according to the cleaning device, the long cleaning pipe is driven to rotate between the filter layers, so that the long cleaning pipe not only can spray water to clean the filter layers in the rotating process, but also can scrape particle impurities accumulated on the filter layers, and the cleaning effect is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water purifier filters, and specifically relates to a filter for a multi-stage water purifier. Background Technique

[0002] The filter element is the core part of a water purifier. The filter element can separate solid particles in water or enable different substances to come into full contact, accelerating the reaction time to achieve the purification effect. After the liquid with impurities flows into the filter element, through the filter screen and the filter absorption layer with a certain specification arranged inside it, the impurities will be blocked and separated, and the clean water will flow out through the filter element, thus achieving the purification effect. However, there are still some problems with the existing filter elements, specifically as follows:

[0003] Most of the existing filter elements are formed by simply assembling multiple filter layers, so that the water flow enters from one end and then flows out from the outer side after passing through the filter layer. However, after long-term use, the solid particle impurities separated and filtered by such a filter element will gradually block the mesh holes of the filter layer, resulting in a gradual decrease in the water permeability of the filter element. It needs to be replaced or cleaned regularly. Even if it is cleaned, only a simple cleaning of the filter layers on the inner and outer ring surfaces of the filter element can be achieved, and the filter layer in the central part cannot be well cleaned. As a result, most people directly replace the existing filter elements after using them for a period of time, which reduces the service life of the filter element and increases the use cost. For this reason, we propose a filter for a multi-stage water purifier. Summary of the Invention

[0004] The present invention provides a filter for a multi-stage water purifier, which has the advantages of good self-cleaning effect and long service life, and solves the problems raised in the above background technique.

[0005] The present invention provides the following technical solution: A filter for a multi-stage water purifier includes a top ring. A filter layer is installed at the bottom end of the top ring. A sealing component is fixedly installed at the bottom end of the filter layer. An extended ring shell is fixedly installed at the bottom end of the sealing component. A waste water discharge grid is opened at the bottom end of the extended ring shell. A partition ring plate is fixedly installed inside the extended ring shell. A docking ring is movably installed on the partition ring plate. A cleaning component is movably installed on the sealing component. An upper sealing component is fixedly installed at the bottom end of the sealing component. A pulling component is installed at the bottom end of the upper sealing component. An outer water guide pipe is fixedly installed at the bottom end of the extended ring shell. An inlet water distribution component is fixedly installed at the bottom end of the outer water guide pipe. A bottom sealing plate is fixedly installed inside the bottom end of the filter layer. A connecting rotating ring is movably installed on the extended ring shell. A flow direction limiting plate is fixedly installed at the bottom end of the top ring;

[0006] The closed component includes a first collar. A second collar is installed on the inner ring of the first collar. A third collar is installed on the inner ring of the second collar. Discharge grooves are provided on the second collar and the third collar. Insertion grooves are provided on the inner rings of the first collar and the second collar. Plug rods are movably installed on the outer rings of the second collar and the third collar.

[0007] The cleaning component includes a flat water inlet pipe. A connecting ring seat is fixedly installed at the top of the flat water inlet pipe. A long cleaning pipe is fixedly installed at the top of the connecting ring seat.

[0008] The upper sealing component includes a sealing ring. A docking seat is fixedly installed at the bottom of the sealing ring.

[0009] The pulling component includes a bottom block. A vertical plate is fixedly installed at the top of the bottom block. An arc-shaped supporting suspension rod is fixedly installed at the top of the vertical plate. A base is fixedly installed at the top of the arc-shaped supporting suspension rod. A docking head is movably installed on the base. A spring is fixedly installed in the middle of the top of the bottom block. Limiting convex blocks are fixedly installed at both ends of the top of the bottom block.

[0010] The water inlet distribution component includes a water guide cavity shell. An extended insertion convex shell is fixedly installed at the bottom of the water guide cavity shell. An outer water inlet pipe is fixedly installed at the bottom of the water guide cavity shell. A one-way flow structure is fixedly installed inside the water guide cavity shell.

[0011] In a preferred embodiment, the filter layer and the flow direction limiting plate are arranged in an interlaced and inserted and fitted manner. A plurality of small baffle plates are evenly arranged on the flow direction limiting plate, and the small baffle plates are arranged to rotate and open unidirectionally outward.

[0012] In a preferred embodiment, the upper and lower ends of the docking ring are respectively clamped and rotatably arranged inside the upper and lower ends of the partition ring plate. The bottom end of the cleaning component is inserted and fixedly installed inside the docking ring. The outer side of the docking ring is fixedly connected to the connecting rotating ring through a short rod.

[0013] In a preferred embodiment, the outer water guide pipe extends through and is arranged inside the ring shell between the partition ring plate and the inner ring of the extended ring shell. The connecting rotating ring protrudes on the inner ring of the extended ring shell, and the connecting rotating ring is clamped and rotatably arranged on the inner ring of the extended ring shell.

[0014] In a preferred embodiment, the cleaning component is rotatably arranged between the first collar and the second collar and between the second collar and the third collar. The top end of the upper sealing component is movably and sealingly inserted into the discharge groove. One side of the insertion groove is a slant groove structure. The plug rod can rotate around an axis and a torsion spring is sleeved on the rotating axis.

[0015] In a preferred embodiment, the flat water inlet pipe is fixedly inserted and installed inside the docking ring. The rotation path of the flat water inlet pipe passes through the connection position of the upper sealing component and the pulling component. The end of the flat water inlet pipe is arranged in the space between the partition ring plate and the extension ring shell. The connecting ring seat is rotatably arranged inside the closing component. The long cleaning pipe is arranged in contact with the filter layer, and a plurality of water outlet nozzle openings are arranged on the side of the long cleaning pipe in contact with the filter layer.

[0016] In a preferred embodiment, the closing ring can be inserted into the discharge groove for sealing. The docking seat is provided with a slot on the side where the pulling component is arranged for docking, and the top end of the pulling component is inserted into the slot.

[0017] In a preferred embodiment, the bottom end of the bottom block is spaced from the inner bottom end of the water inlet distribution component. The number of bases arranged on each arc-shaped support suspension rod is greater than or equal to three. The docking head is rotatably arranged on the base, and a coil spring is arranged on the rotating shaft. A plug block that can be docked with the slot on the docking seat is arranged on one side of the top end of the docking head. The top end of the spring is fixedly connected to the inner top end of the water inlet distribution component. The vertical plate is inserted and movably arranged at the top end of the water inlet distribution component. A sealed telescopic sleeve is arranged between the vertical plate and the outside of the top end of the water inlet distribution component. The limit convex block restricts the bottom end of the vertical plate from completely moving out of the inner part of the water inlet distribution component.

[0018] In a preferred embodiment, the bottom block is arranged directly above the position of the extended insertion convex shell, and the two have matching sizes. The one-way flow structure rotates unidirectionally at the position where the outer water inlet pipe is located. A vertical plate is arranged on one side of the bottom block at the inner top end of the water guide cavity shell. A water permeable groove is formed in the middle of the vertical plate, and the bottom block closes the water permeable groove in the non-moving state.

[0019] The present invention has the following beneficial effects:

[0020] 1. For the filter element used in this multi-stage water purifier, by arranging a rotatable cleaning component between each layer of filter layer and combining with the water inlet distribution component that is communicated with the bottom of the cleaning component, it can be realized that when the filter element needs to be cleaned, water is supplied through the water inlet distribution component, so that the cleaning water enters the cleaning component from the water inlet distribution component and finally sprays out from the long cleaning pipe. The long cleaning pipe is arranged vertically and at the same height as the filter layer. Thus, inserting from the outside to the bottom of the filter element can drive the connecting rotating ring to rotate, and then drive the long cleaning pipe to rotate between the filter layers. In this way, during the rotation of the long cleaning pipe, it can not only spray water to clean the filter layer, but also scrape the particulate impurities accumulated on the filter layer, greatly improving the cleaning effect.

[0021] 2. The filter element for the multi-stage water purifier is provided with a flow restriction plate at the bottom end of the top ring, the flow restriction plate is plugged into the outer ring surface of the filter layer, and a plurality of small baffles that can be opened by rotating in one direction are evenly arranged on the flow restriction plate, and the opening direction is from the inside to the outside, so that the water poured from the middle of the filter element can squeeze it open normally during normal use, and the water flows smoothly. When cleaning, a long cleaning pipe that can spray water for cleaning between each filter layer is provided, so that the small baffles that open in one direction will prevent water from flowing in the opposite direction, and prevent impurities from repeatedly flowing between the multiple filter layers and being unable to be discharged well, thereby improving the cleaning effect. At the same time, after water is supplied from the bottom, the pulling assembly will be pulled downward as a whole, so that it pulls the closed ring downward and separates it from the inside of the discharge trough, thereby ensuring that the sewage cleaned inside can be directly discharged from the discharge trough at the bottom, and finally discharged from the inside of the filter element from the wastewater discharge grid, thereby improving the cleaning effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the partial internal three-dimensional structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the connection between the sealing component and the cleaning component of the present invention;

[0026] Figure 5 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the sealing component of the present invention;

[0028] Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle;

[0029] Figure 8 It is a schematic diagram of the partial three-dimensional structure of the bottom of the present invention;

[0030] Figure 9 For the present invention Figure 8 The enlarged structural diagram at C in the middle;

[0031] Figure 10 It is a schematic diagram of the three-dimensional structure of the connection between the pulling assembly and the water inlet distribution assembly of the present invention;

[0032] Figure 11 It is a schematic diagram of the three-dimensional structure of the pulling assembly of the present invention;

[0033] Figure 12 This is a schematic diagram of the internal three-dimensional structure of the water inlet distribution component of the present invention.

[0034] In the figure: 1. Top ring; 2. Filter layer; 3. Sealing component; 31. First sleeve ring; 32. Second sleeve ring; 33. Third sleeve ring; 34. Discharge groove; 35. Insertion slot; 36. Insertion rod; 4. Extended ring shell; 5. Waste water discharge grid; 6. Partition ring plate; 7. Docking ring; 8. Cleaning component; 81. Flat water inlet pipe; 82. Connecting ring seat; 83. Cleaning long pipe; 9. Upper sealing component; 91. Sealing ring; 92. Docking seat; 10. Pulling component; 101. Bottom block; 102. Vertical plate; 103. Arc-shaped supporting suspension rod; 104. Base; 105. Docking head; 106. Spring; 107. Limit convex block; 11. Outer water guide pipe; 12. Water inlet distribution component; 121. Water guide cavity shell; 122. Extended insertion convex shell; 123. Outer water inlet pipe; 124. Unidirectional flow structure; 13. Bottom sealing plate; 14. Connecting rotating ring; 15. Flow direction limiting plate. Specific embodiments

[0035] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples, and the filter element for a multi-stage water purifier involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0036] Please refer to Figure 1-8 , a filter element for a multi-stage water purifier, including a top ring 1, a filter layer 2 is installed at the bottom end of the top ring 1, a sealing component 3 is fixedly installed at the bottom end of the filter layer 2, an extended ring shell 4 is fixedly installed at the bottom end of the sealing component 3, a waste water discharge grid 5 is opened at the bottom end of the extended ring shell 4, a partition ring plate 6 is fixedly installed inside the extended ring shell 4, a docking ring 7 is movably installed on the partition ring plate 6, a cleaning component 8 is movably installed on the sealing component 3, an upper sealing component 9 is fixedly installed at the bottom end of the sealing component 3, a pulling component 10 is installed at the bottom end of the upper sealing component 9, an outer water guide pipe 11 is fixedly installed at the bottom end of the extended ring shell 4, a water inlet distribution component 12 is fixedly installed at the bottom end of the outer water guide pipe 11, a bottom sealing plate 13 is fixedly installed inside the bottom end of the filter layer 2, a connecting rotating ring 14 is movably installed on the extended ring shell 4, and a flow direction limiting plate 15 is fixedly installed at the bottom end of the top ring 1;

[0037] Compared with the prior art, in the present application, a rotatable cleaning component 8 is provided between each filter layer 2, and an inlet water distribution component 12 is provided in through connection with the bottom of the cleaning component 8. In this way, when it is necessary to clean the filter element, water can be supplied through the inlet water distribution component 12, so that the cleaning water enters the cleaning component 8 from the inlet water distribution component 12 and finally sprays out from the cleaning long tube 83. The cleaning long tube 83 is vertically arranged at the same height as the filter layer 2. Therefore, inserting from the outside to the bottom of the filter element can drive the connection rotating ring 14 to rotate, and then drive the cleaning long tube 83 to rotate between the filter layers 2. In this way, during the rotation of the cleaning long tube 83, not only can water be sprayed to clean the filter layer 2, but also the particulate impurities accumulated on the filter layer 2 can be scraped off, greatly improving the cleaning effect. At the same time, a flow direction limiting plate 15 is installed at the bottom end of the top ring 1. The flow direction limiting plate 15 is inserted and arranged in a fitting manner with the outer ring surface of the filter layer 2, and a plurality of small baffles that can be rotated and opened unidirectionally are uniformly arranged on the flow direction limiting plate 15, and the opening direction is to rotate and open from the inside to the outside. In this way, when in normal use, the water poured into the middle of the filter element can normally squeeze it open, and the water flows smoothly. When cleaning, since there is a cleaning long tube 83 that can spray water for cleaning between each filter layer 2, the unidirectionally opened small baffles will prevent the water from flowing backward, avoiding the repeated flow of impurities between the multiple filter layers 2 and being unable to be discharged well, improving the cleaning effect. At the same time, after supplying water from the bottom, the pulling component 10 will be pulled downward as a whole, so that it pulls the closing ring 91 downward to disengage from the inside of the discharge slot 34, thereby ensuring that the internal cleaning sewage can be directly discharged from the discharge slot 34 at the bottom end and finally discharged from the waste water discharge grid 5 from the inside of the filter element, improving the cleaning effect and efficiency.

[0038] Please refer to Figure 1-3 , a filter element for a multi-stage water purifier, including a filter layer 2. The filter layer 2 and the flow direction limiting plate 15 are arranged in an interlaced and inserted and fitting manner. A plurality of small baffles are uniformly arranged on the flow direction limiting plate 15, and the small baffles are arranged to rotate and open unidirectionally to the outside;

[0039] In this embodiment, it should be noted that during the normal use of the filter element, water flows in from the middle. Under the action of the water pressure, the small baffles will be squeezed and opened to the outside, thereby ensuring the normal flow of water. When cleaning, since the cleaning component 8 is used to spray cleaning water between every two adjacent filter layers 2 for cleaning, the unidirectional opening method of the small baffles can ensure that the water will not flow reversely, avoiding the repeated flow of the impurity particles filtered and accumulated on the filter layer 2 between the multiple filter layers 2 and being difficult to discharge, and realizing that the impurities on each layer are washed at the current position and flow out from the bottom end, greatly improving the cleaning effect.

[0040] Please refer to Figure 1-5, A filter element for a multi-stage water purifier, including a docking ring 7. The upper and lower ends of the docking ring 7 are respectively clamped and rotatably arranged inside the upper and lower ends of a partition ring plate 6. The bottom end of a cleaning assembly 8 is inserted into the docking ring 7 and fixedly installed. The outer side of the docking ring 7 is fixedly connected to a connecting rotating ring 14 through a short rod. An outer water conduit 11 is arranged to extend through between the partition ring plate 6 and the inner ring of an extension ring shell 4 and extend into the interior of the ring shell 4. The connecting rotating ring 14 is convexly arranged on the inner ring of the extension ring shell 4, and the connecting rotating ring 14 is clamped and rotatably arranged on the inner ring of the extension ring shell 4;

[0041] In this embodiment, it should be noted that during the cleaning process, an external rotating structure can be clamped onto the inner ring of the connecting rotating ring 14, thereby driving the connecting rotating ring 14 to rotate. In this way, the docking ring 7 and the cleaning assembly 8 can be driven to rotate, so that the water sprayed from the cleaning assembly 8 can be evenly sprayed in a circular shape on the filter layer 2, ensuring the cleaning effect.

[0042] Please refer to Figure 1-6 , A filter element for a multi-stage water purifier, including a sealing assembly 3. The sealing assembly 3 includes a first sleeve ring 31. A second sleeve ring 32 is installed on the inner ring of the first sleeve ring 31. A third sleeve ring 33 is installed on the inner ring of the second sleeve ring 32. Discharge grooves 34 are formed on the second sleeve ring 32 and the third sleeve ring 33. Insertion grooves 35 are formed on the inner rings of the first sleeve ring 31 and the second sleeve ring 32. Plug rods 36 are movably installed on the outer rings of the second sleeve ring 32 and the third sleeve ring 33;

[0043] In this embodiment, it should be noted that the cleaning assembly 8 is rotatably arranged between the first sleeve ring 31 and the second sleeve ring 32 and between the second sleeve ring 32 and the third sleeve ring 33. The top end of the upper sealing assembly 9 is movably and sealingly inserted into the discharge groove 34. One side of the insertion groove 35 is a sloped groove structure. The plug rod 36 can rotate around an axis and a torsion spring is sleeved on the rotating shaft. Such a rotatable and resetable setting of the plug rod 36 ensures the normal passage of the cleaning assembly 8 when it rotates through between the first sleeve ring 31 and the second sleeve ring 32 and between the second sleeve ring 32 and the third sleeve ring 33, and at the same time ensures that the plug rod 36 rebounds and re-clamps into the insertion groove 35 after rotating away from this position to ensure the structural stability between the adjacent first sleeve ring 31 and the second sleeve ring 32 and between the second sleeve ring 32 and the third sleeve ring 33.

[0044] Please refer to Figure 1-5 , A filter element for a multi-stage water purifier, including a cleaning assembly 8. The cleaning assembly 8 includes a flat water inlet pipe 81. A connecting ring seat 82 is fixedly installed at the top end of the flat water inlet pipe 81. A long cleaning pipe 83 is fixedly installed at the top end of the connecting ring seat 82;

[0045] In this embodiment, it should be noted that the flat water inlet pipe 81 is fixedly inserted and installed inside the docking ring 7. The rotation path of the flat water inlet pipe 81 passes through the connection position of the upper sealing component 9 and the pulling component 10. The end of the flat water inlet pipe 81 is arranged in the space between the partition ring plate 6 and the extension ring shell 4. The connecting ring seat 82 is rotatably arranged inside the closing component 3. The long cleaning pipe 83 is arranged in contact with the filter layer 2, and a plurality of water outlet nozzle openings are arranged on the side of the long cleaning pipe 83 in contact with the filter layer 2. In this way, during the cleaning process, the water transported up by the outer water guide pipe 11 to the space between the partition ring plate 6 and the docking ring 7 is poured into the flat water inlet pipe 81, and then the water is transported to the water outlet nozzles in the long cleaning pipe 83 through the connecting ring seat 82 and sprayed out, realizing the cleaning of the filter layer 2. At the same time, the long cleaning pipe 83 is arranged in contact with the filter layer 2, so that during the rotation process, the impurity particles docked on the filter layer 2 can be scraped off to the greatest extent, thereby improving the cleaning effect.

[0046] Please refer to Figure 5-9 , a filter element for a multi-stage water purifier, including an upper sealing component 9. The upper sealing component 9 includes a sealing ring 91, and a docking seat 92 is fixedly installed at the bottom end of the sealing ring 91;

[0047] In this embodiment, it should be noted that the sealing ring 91 can be inserted into the discharge groove 34 for sealing. A slot is provided on the side of the docking seat 92 where the pulling component 10 is arranged for docking, and the top end of the pulling component 10 is inserted into the slot. In this way, during cleaning, the water flow in the water inlet distribution component 12 can be used to drive the pulling component 10 to pull the sealing ring 91 downward, so that the sealing ring 91 is separated from the inside of the discharge groove 34, thereby ensuring that the sewage in the filter layer 2 can be discharged smoothly. The separable docking setting of the docking seat 92 and the pulling component 10 can ensure the normal rotation of the cleaning component 8 when passing through this position during the rotation process.

[0048] Please refer to Figure 8-11 , a filter element for a multi-stage water purifier, including a pulling component 10. The pulling component 10 includes a bottom block 101, a vertical plate 102 is fixedly installed at the top end of the bottom block 101, an arc-shaped support suspension rod 103 is fixedly installed at the top end of the vertical plate 102, a base 104 is fixedly installed at the top end of the arc-shaped support suspension rod 103, a docking head 105 is movably installed on the base 104, a spring 106 is fixedly installed in the middle of the top end of the bottom block 101, and limiting convex blocks 107 are fixedly installed at both ends of the top end of the bottom block 101;

[0049] In this embodiment, it should be noted that the bottom end of the bottom block 101 is spaced from the inner bottom end of the water inlet distribution assembly 12. The number of bases 104 provided on each arc-shaped support suspension rod 103 is greater than or equal to three. The docking head 105 is rotatably provided on the base 104, and a torsion spring is provided on the rotating shaft. One side of the top end of the docking head 105 is provided with a plug block that can be docked with the slot on the docking seat 92. The top end of the spring 106 is fixedly connected to the inner top end of the water inlet distribution assembly 12. The vertical plate 102 is inserted into the top end of the water inlet distribution assembly 12 and is movably provided. A sealed telescopic sleeve is provided between the vertical plate 102 and the outer part of the top end of the water inlet distribution assembly 12. The limit lug 107 restricts the bottom end of the vertical plate 102 from completely moving out of the inside of the water inlet distribution assembly 12. In this way, after water is introduced into the water inlet distribution assembly 12, the continuous input of water flow can be used to push the bottom block 101 downward until the water flows in the water inlet distribution assembly 12 and then enters the cleaning assembly 8 for flushing. The docking of the docking head 105 and the docking seat 92 can ensure that when the water inlet flat tube 81 rotates through this position, the docking head 105 rotates to allow it to pass through, and automatically rotates back and is clamped to the docking seat 92 after passing through, so as to ensure the stable connection between the upper sealing assembly 9 and the pulling assembly 10.

[0050] Please refer to Figure 8-12 , a filter element for a multi-stage water purifier, including a water inlet distribution assembly 12. The water inlet distribution assembly 12 includes a water guide cavity housing 121. The bottom end of the water guide cavity housing 121 is fixedly installed with an extended insertion convex housing 122. The bottom end of the water guide cavity housing 121 is fixedly installed with an outer water inlet pipe 123. A one-way flow structure 124 is fixedly installed inside the water guide cavity housing 121;

[0051] In this embodiment, it should be noted that the bottom block 101 is arranged directly above the position of the extended insertion convex housing 122, and their sizes are adapted to each other. The one-way flow structure 124 rotates unidirectionally at the position where the outer water inlet pipe 123 is located. A vertical plate is arranged on one side of the bottom block 101 at the inner top end of the water guide cavity housing 121. A water permeable groove is opened in the middle of the vertical plate. The water permeable groove is closed when the bottom block 101 is in a non-moving state. In this way, the water poured into the water guide cavity housing 121 from the outer water inlet pipe 123 will flow unidirectionally under the blocking action of the one-way flow structure 124. When it reaches the position of each bottom block 101, it will be pressed downward by the water pressure in this area, so that the water enters the next area through the water permeable groove, realizing the circulating flow of water therein. And during the downward movement, the bottom block 101 will enter the extended insertion convex housing 122, thus ensuring the smooth flow of water.

[0052] Working principle: when cleaning is needed, external water supply is poured into the water guide cavity shell 121 through the external water inlet pipe 123, and then the water flows in one direction under the action of the one-way flow structure 124, pressing the bottom blocks 101 downwards one by one into the extended plug-in convex shell 122, and the bottom block 101 drives the docking joint 105 to pull the closed ring 91 downwards and move it out of the discharge groove 34, thereby opening the bottom end channel inside the filter layer 2 and the extended ring shell 4, and the water will flow upwards through the external water guide pipe 11 to the inside of the extended ring shell 4, and then enter the water outlet nozzle in the cleaning long tube 83 through the water inlet flat pipe 81 to spray out, so as to achieve cleaning. The filter layer 2 is sprayed and washed, and at the same time, a rotatable driving structure is inserted outside and plugged into the connecting rotating ring 14, driving the connecting rotating ring 14 and the cleaning component 8 to rotate. The rotation of the cleaning long tube 83 will also scrape and clean the surface of the filter layer 2, and the cleaning is achieved by combining with the sprayed water. The cleaned sewage is discharged from the bottom discharge groove 34 and enters the wastewater discharge grid 5 for final discharge. When the water inlet flat tube 81 passes through the position of the docking joint 105 during the rotation process, it will rotate, and then automatically rotate back to ensure the connection stability. The rotation of the cleaning long tube 83 has the same effect on the driving effect of the plug 36.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter element for a multi-stage water purifier, comprising a top ring (1), characterized in that: The bottom end of the top ring (1) is provided with a filter layer (2), the bottom end of the filter layer (2) is fixedly provided with a closed component (3), the bottom end of the closed component (3) is fixedly provided with an extended ring shell (4), the bottom end of the extended ring shell (4) is provided with a wastewater discharge grid (5), a separation ring plate (6) is fixedly provided inside the extended ring shell (4), a docking ring (7) is movably provided on the separation ring plate (6), a cleaning component (8) is movably provided on the closed component (3), and the closed component (3) is provided with a cleaning component (9). An upper sealing component (9) is fixedly installed at the bottom end, a pulling component (10) is installed at the bottom end of the upper sealing component (9), an external water pipe (11) is fixedly installed at the bottom end of the extended ring shell (4), a water inlet distribution component (12) is fixedly installed at the bottom end of the external water pipe (11), a bottom sealing plate (13) is fixedly installed inside the bottom end of the filter layer (2), a connecting rotating ring (14) is movably installed on the extended ring shell (4), and a flow direction limiting plate (15) is fixedly installed at the bottom end of the top ring (1); The closure assembly (3) comprises a first sleeve (31), a second sleeve (32) is mounted on the inner ring of the first sleeve (31), a third sleeve (33) is mounted on the inner ring of the second sleeve (32), a discharge groove (34) is provided on the second sleeve (32) and the third sleeve (33), a plug-in groove (35) is provided on the inner ring of the first sleeve (31) and the second sleeve (32), and an insert rod (36) is movably mounted on the outer ring of the second sleeve (32) and the third sleeve (33); The cleaning assembly (8) comprises a water inlet flat tube (81), a connecting ring seat (82) is fixedly mounted on the top of the water inlet flat tube (81), and a cleaning long tube (83) is fixedly mounted on the top of the connecting ring seat (82); The upper sealing assembly (9) comprises a closed ring (91), and a docking seat (92) is fixedly mounted on the bottom end of the closed ring (91); The pulling assembly (10) comprises a bottom block (101), a vertical plate (102) is fixedly mounted on the top of the bottom block (101), an arc-shaped support suspension rod (103) is fixedly mounted on the top of the vertical plate (102), a base (104) is fixedly mounted on the top of the arc-shaped support suspension rod (103), a docking joint (105) is movably mounted on the base (104), a spring (106) is fixedly mounted in the middle of the top of the bottom block (101), and limiting protrusions (107) are fixedly mounted on both ends of the top of the bottom block (101); The water inlet distribution assembly (12) comprises a water guide cavity shell (121), an extended plug-in convex shell (122) is fixedly mounted on the bottom end of the water guide cavity shell (121), an external water inlet pipe (123) is fixedly mounted on the bottom end of the water guide cavity shell (121), and a one-way flow structure (124) is fixedly mounted inside the water guide cavity shell (121).

2. A filter element for a multi-stage water purifier according to claim 1, characterized in that: The filter layer (2) and the flow restriction plate (15) are arranged in a staggered, plug-in and fitted manner, and a plurality of small baffles are evenly arranged on the flow restriction plate (15), and the small baffles are arranged to be opened by rotating outward in a single direction.

3. A filter element for a multi-stage water purifier according to claim 1, characterized in that: The upper and lower ends of the docking ring (7) are respectively clamped in the upper and lower ends of the separation ring plate (6) for rotation and movement, the bottom end of the cleaning assembly (8) is inserted in the docking ring (7) for fixed installation, and the outer side of the docking ring (7) is fixedly connected to the connecting rotating ring (14) via a short rod.

4. A filter element for a multi-stage water purifier according to claim 3, characterized in that: The external water conduit (11) is located between the separation ring plate (6) and the inner ring of the extended ring shell (4), extending through and into the inner part of the ring shell (4); the connecting rotating ring (14) is located on the inner ring of the extended ring shell (4) and protrudes; the connecting rotating ring (14) is clamped on the inner ring of the extended ring shell (4) and is rotatably arranged.

5. The filter element for a multi-stage water purifier according to claim 1, characterized in that: The cleaning assembly (8) is rotatably arranged between the first sleeve ring (31) and the second sleeve ring (32) and between the second sleeve ring (32) and the third sleeve ring (33); the top end of the upper sealing assembly (9) is movably sealed and plugged in the discharge groove (34); one side of the plug-in groove (35) is an inclined groove structure; the plug rod (36) is rotatable around an axis and a coil spring is sleeved on the rotating axis.

6. A filter element for a multi-stage water purifier according to claim 1, characterized in that: The water inlet flat tube (81) is fixedly inserted into the docking ring (7) and fixedly installed. The rotation path of the water inlet flat tube (81) passes through the connection position of the upper sealing component (9) and the pulling component (10). The end of the water inlet flat tube (81) is located in the space between the separation ring plate (6) and the extension ring shell (4). The connecting ring seat (82) is rotatably arranged inside the sealing component (3). The cleaning long tube (83) is arranged in contact with the filter layer (2), and a plurality of water outlet nozzles are arranged on one side of the cleaning long tube (83) in contact with the filter layer (2).

7. A filter element for a multi-stage water purifier according to claim 1, characterized in that: The closed ring (91) can be plugged into the discharge groove (34) for sealing, and the docking seat (92) is located on one side of the pulling component (10) for docking and has a slot, and the top end of the pulling component (10) is plugged into the slot.

8. The filter element for a multi-stage water purifier according to claim 1, characterized in that: The bottom end of the bottom block (101) is spaced apart from the bottom end of the water inlet distribution component (12); the number of the base (104) disposed on each arc-shaped support suspension rod (103) is greater than or equal to three; the docking joint (105) is rotatably disposed on the base (104), and a coil spring is disposed on the rotating shaft; a plug block that can dock with a slot on the docking seat (92) is disposed on one side of the top end of the docking joint (105); the top end of the spring (106) is fixedly connected to the top end of the water inlet distribution component (12); the vertical plate (102) is movably inserted into the top end of the water inlet distribution component (12); a sealing telescopic sleeve is disposed on the outside of the vertical plate (102) and the top end of the water inlet distribution component (12); and the limiting protrusion (107) limits the bottom end of the vertical plate (102) from being completely moved out of the water inlet distribution component (12).

9. A filter element for a multi-stage water purifier according to claim 1, characterized in that: The bottom block (101) is arranged directly above the position of the extended plug-in convex shell (122), and the sizes of the two are matched. The one-way flow structure (124) is located at the position of the external water inlet pipe (123) and rotates in one direction. The internal top end of the water guide cavity shell (121) is located on one side of the bottom block (101) and is provided with a vertical plate. The middle part of the vertical plate is provided with a water-permeable groove. The bottom block (101) closes the water-permeable groove when it is not moving.

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