Water purifier with filter cleaning function

Abstract

This invention discloses a water purifier with a filter cleaning function. The water purifier includes an upper shell and a lower shell locked together by a clamp. The top of the upper shell is provided with a clean water inlet, and the side walls of the lower shell are respectively provided with a water inlet and a sewage outlet communicating with the internal space of the lower shell. The internal space of the upper shell is divided into an outer cavity and an inner cavity for water transmission, with its center as the dividing point. The end of the inner cavity near the lower shell is fitted with a connecting sleeve for connecting with the internal space of the lower shell. A filter cartridge with a hollow columnar filter element is fitted in the cavity in the middle of the connecting sleeve. The filter cartridge is obliquely cut by a beveled block fixedly connected to its bottom end and a beveled block fixedly connected to the middle of the connecting sleeve, so as to adjust the height of the filter cartridge in the connecting sleeve. The water purifier can raise the height of the filter cartridge in the connecting sleeve to allow water to be injected from the outer cavity into the middle of the filter cartridge, thereby using water from top to bottom to clean the inner wall of the filter cartridge in the filter cartridge to remove impurities accumulated on the inner wall of the filter cartridge.

Description

Technical Field

[0001] This invention relates to the field of water purifier technology, specifically to a water purifier with a filter cleaning function. Background Technology

[0002] As people pay more and more attention to health, the impact of daily water use on people's health is also receiving more and more attention. In order to ensure the high quality of daily water use, many families choose to install water purifiers to purify drinking water and ensure its quality.

[0003] However, most existing water purifiers use a filter cartridge structure to filter water. After a period of use, the amount of purified water will decrease. This is because impurities accumulate on the surface of the filter cartridge, reducing its ability to pass through the medium and thus reducing the amount of purified water. To solve the problem of filter cartridge cleaning, the filter cartridge is usually removed for cleaning or replacement. The process of removing the filter cartridge takes a certain amount of time and is relatively cumbersome. Moreover, the problem of the filter cartridge's reduced filtration capacity due to excessive impurity accumulation is not due to a defect in the filter cartridge itself. Replacing the filter cartridge due to this problem not only incurs a certain cost but also causes unnecessary waste. Summary of the Invention

[0004] To address the shortcomings of the aforementioned technology, this invention provides a water purifier that allows water to be injected into the middle of the filter cartridge from the outer cavity by raising the height of the filter cartridge within the connecting sleeve. This, in turn, uses water from top to bottom to clean the inner wall of the filter cartridge, thereby removing impurities accumulated on the inner wall of the filter cartridge.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] This invention discloses a water purifier with a filter cleaning function. The water purifier includes an upper shell and a lower shell locked together by clamps. The top of the upper shell is provided with a clean water inlet, and the side walls of the lower shell are respectively provided with a water inlet and a sewage outlet communicating with the internal space of the lower shell. The internal space of the upper shell can be divided into an outer cavity and an inner cavity for water transmission, with its center as the dividing point. The end of the inner cavity near the lower shell is fitted with a connecting sleeve for connecting with the internal space of the lower shell. A filter cartridge with a hollow columnar filter element is fitted in the cavity in the middle of the connecting sleeve. The filter cartridge is obliquely fitted with an obliquely cut block fixedly connected to its bottom end and an obliquely cut block fixedly connected to the middle of the connecting sleeve. To achieve the adjustment of the height of the filter cartridge within the docking sleeve, both of the obliquely cut blocks are provided with first docking holes. When the two first docking holes in the upper and lower positions are opposite each other, a transmission channel is formed on the outer side of the filter cartridge connecting the outer cavity and the inner space of the lower shell. The bottom end of the filter cartridge and the bottom end of the docking sleeve are provided with second docking holes that switch to a relative or misaligned state when the filter cartridge rotates. The two second docking holes in the inner and outer directions achieve communication or separation between the inner space of the lower shell and the inner space of the filter cartridge by switching them to a relative or misaligned state. A first partition is provided in the upper shell space near the water inlet to control the communication between the outer cavity and the water inlet or the inner space of the filter cartridge.

[0007] Furthermore, the filter cartridge is composed of a cylinder and a sleeve. The sleeve is fitted onto the end of the cylinder away from the second docking hole. The top of the sleeve is a second partition. The inner wall of the top of the upper shell is fitted with a positioning sleeve by means of a threaded connection. There is a gap between the end of the positioning sleeve near the water inlet and the inner wall of the top of the upper shell. The edge of the second partition is pressed into the gap. The edge of the second partition has a plurality of third docking holes along the circumferential direction of the second partition. The edge of the first partition has a plurality of fourth docking holes along the circumferential direction of the first partition. The fourth docking holes and the third docking holes are misaligned vertically when the second partition and the first partition abut against each other. The bottom surface of the second partition has a plurality of first baffles located outside the third docking holes. The first baffles and the plurality of second baffles set on the edge of the cylinder are misaligned internally and externally when the filter cartridge is located at the lowest point inside the docking sleeve.

[0008] Furthermore, the space above the filter cartridge is a first variable cavity that communicates with the internal space of the filter cartridge, and the volume of the first variable cavity decreases as the height of the filter cartridge increases.

[0009] Furthermore, the top surface of the cylinder is provided with two pushing blocks that pass through the second partition and the top of the upper shell from low to high in the circumferential direction. The pushing blocks are fixedly connected to the first partition. The second partition outside the third docking hole is provided with a first sliding groove for cooperating with the pushing blocks. The top of the upper shell is provided with a second sliding groove with the same shape as the first sliding groove for cooperating with the pushing blocks. The length of the first sliding groove and the second sliding groove in the circumferential direction is twice the length of the pushing block in the circumferential direction. A sealing plate covering the opening at the upper end of the second sliding groove is fixedly connected to the top of the pushing block. The top surface of the sealing plate is provided with a handle. The center of the first partition is provided with a through hole.

[0010] Furthermore, a second variable cavity is formed between the first partition and the second partition. The volume of the second variable cavity increases as the height of the filter cartridge increases. When the volume of the second variable cavity reaches its maximum value, the first partition abuts against the inner wall of the top of the upper shell and seals the second sliding groove. The fourth docking hole and the third docking hole are vertically aligned in the height direction. The top surface of the cartridge abuts against the bottom surface of the second partition. The through hole is connected to the water inlet.

[0011] Furthermore, the walls on opposite sides of the two oblique cut blocks are composed of several fixed oblique cut surfaces and moving oblique cut surfaces distributed circumferentially along the center of the oblique cut blocks. The fixed oblique cut surfaces and moving oblique cut surfaces of the same oblique cut block are connected in an interleaved manner, and their horizontal projection within the circumference of the oblique cut block forms a closed ring. The fixed oblique cut surfaces connected to both ends of the moving oblique cut surface within the same oblique cut block are all located at two different height positions. All fixed oblique cut surfaces at the high position of the oblique cut block are located at the same height, and all fixed oblique cut surfaces at the low position are located at the same height. The projection of the moving oblique cut surface on the vertical plane is an oblique line, and the projection of the fixed oblique cut surface on the vertical plane is a straight line parallel to the horizontal plane.

[0012] Furthermore, the outer side of the first docking hole and the outer side of the filter element cylinder are both provided with a fifth docking hole. The bottom edge of the filter element cylinder is a convex edge and the fifth docking hole is located on the edge of the convex edge. When the fifth docking hole and the first docking hole are vertically opposite each other in the height direction, the transmission channel is in the open state.

[0013] Furthermore, a limiting sleeve is provided at the bottom end of the connecting sleeve by means of a threaded engagement, and the bottom surface of the limiting sleeve abuts against the top surface of the convex edge when the height of the filter element cylinder is raised to its maximum.

[0014] Furthermore, the bottom end of the docking sleeve is docked with the docking cylinder in the middle of the lower shell by means of internal and external thread engagement. The water inlet end of the drain outlet is fixedly connected to one side wall of the docking cylinder and communicates with the inside of the docking cylinder. The internal space of the docking cylinder near the water inlet end of the drain outlet is provided with a third partition. The top surface of the third partition is level with the lowest point of the drain hole inside the drain outlet.

[0015] The beneficial effects of this invention are as follows:

[0016] The filter cartridge utilizes the beveled blocks connected to the connecting sleeve to achieve a beveled fit, minimizing the height of the filter cartridge within the connecting sleeve. This opens the transmission channel, allowing communication between the outer cavity and the lower shell. Water entering the transmission channel from the lower shell can then flow from the outer cavity into the center of the filter cartridge, cleaning the inner wall of the filter cartridge from top to bottom and removing accumulated impurities, thus reducing their impact on filtration capacity. After cleaning, the filter cartridge can be rotated to increase its height within the connecting sleeve, closing the transmission channel. At this point, the tap water flowing into the water purifier will be transported from the center of the lower shell to the center of the upper shell, forming a filtration structure that filters impurities from the inside of the filter cartridge outwards. This restores the water purifier to normal operation. Switching between filter cleaning and normal filtration modes is simple. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the external structure of the water purifier.

[0018] Figure 2 This is a schematic diagram of the internal structure of the water purifier in filter cleaning mode.

[0019] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0020] Figure 4 for Figure 2 A magnified view of a portion of point B in the middle.

[0021] Figure 5 This is a schematic diagram of the water purifier in filter cleaning mode, showing the filter cartridge fitting inside the connecting sleeve.

[0022] Figure 6 This is a schematic diagram showing the position and structure of the third and fourth docking holes in the filter element cleaning mode.

[0023] Figure 7 This is a schematic diagram of the cylinder structure.

[0024] Figure 8 This is a schematic diagram of the sleeve structure.

[0025] Figure 9 This is a schematic diagram of the obliquely cut block.

[0026] Figure 10 This is a diagram showing the fit between the two obliquely cut blocks in the filter cleaning mode.

[0027] Figure 11This is a diagram showing the working structure between two oblique blocks in normal filtering mode.

[0028] Figure 12 This is a schematic diagram of the internal structure of the water purifier in normal filtration mode.

[0029] Figure 13 for Figure 12 A magnified view of a portion of point C.

[0030] Figure 14 for Figure 12 A magnified view of a portion of point D.

[0031] Figure 15 This is a schematic diagram showing the positional structure of the third and fourth docking holes under normal filtration mode.

[0032] In the diagram, 1. Upper shell; 2. Lower shell; 3. Clean water inlet; 4. Inlet; 5. Drain outlet; 6. Outer cavity; 7. Inner cavity; 8. Docking sleeve; 9. Filter element; 10. Filter element cartridge; 11. Angled block; 12. First docking hole; 13. Transmission channel; 14. Second docking hole; 15. First partition; 16. Second partition; 17. Positioning sleeve; 18. Third docking hole; 19. Fourth docking hole; 20. ... 21. First baffle; 22. Second baffle; 23. First variable cavity; 24. Push block; 25. First slide groove; 26. Second slide groove; 27. Sealing plate; 28. Through hole; 29. ​​Second variable cavity; 30. Fixed oblique section; 31. Moving oblique section; 32. Fifth docking hole; 33. Protruding edge; 34. Limiting sleeve; 35. Third partition; 36. Cylinder; 37. Sleeve; 38. Docking cylinder; 39. Handle. Detailed Implementation

[0033] This invention discloses a water purifier with a filter cleaning function, such as... Figures 1-11As shown, the water purifier includes an upper shell 1 and a lower shell 2 locked together by clamps. The top of the upper shell 1 has a water inlet 3, and the side walls of the lower shell 2 have an inlet 4 and a drain 5 connecting to the interior space of the lower shell 2. The interior space of the upper shell 1 is divided at its center into an outer cavity 6 for water transmission and an inner cavity 7. A connecting sleeve 8 for connecting with the interior space of the lower shell 2 is fitted into the end of the inner cavity 7 near the lower shell 2. A filter cartridge 10 with a hollow cylindrical filter element 9 is fitted into the cavity in the middle of the connecting sleeve 8. The filter cartridge 10 utilizes a beveled block 11 fixedly connected to its bottom end to beveled with a beveled block 11 fixedly connected to the middle of the connecting sleeve 8 to achieve a beveled fit between the filter cartridge 10 and the connecting sleeve 8. The height of the filter cartridge 10 is adjusted. Both of the two oblique cut blocks 11 are provided with first docking holes 12. When the two first docking holes 12 in the upper and lower positions are opposite each other, a transmission channel 13 is formed on the outside of the filter cartridge 10 to connect the outer cavity 6 and the internal space of the lower shell 2. The bottom end of the filter cartridge 10 and the bottom end of the docking sleeve 8 are provided with second docking holes 14 that switch to a state of opposite or misaligned when the filter cartridge 10 rotates. The two second docking holes 14 in the inner and outer directions realize the connection or separation between the internal space of the lower shell 2 and the interior of the filter cartridge 10 by switching the two to a state of opposite or misaligned. The upper shell 1 space near the water inlet 3 is provided with a first partition 15 to control the connection between the outer cavity 6 and the water inlet 3 or the interior of the filter cartridge 10.

[0034] It should be noted that the filter cartridge 10 utilizes the oblique cut block 11 connected to it to engage with the oblique cut block 11 connected to the docking sleeve 8, so that the height of the filter cartridge 10 within the docking sleeve 8 is at its lowest value. This opens the transmission channel 13 to achieve communication between the outer cavity 6 and the lower shell 2. Due to the misalignment of the second docking hole 14 in the inward and outward directions, the tap water entering the lower shell 2 from the inlet 4 cannot enter the space in the middle of the lower shell 2. As the amount of tap water injected into the lower shell 2 increases, the tap water from the lower shell 2 enters the outer cavity 6 from bottom to top through the transmission channel 13, and then enters the middle of the filter cartridge 10 from the space of the upper shell 1 above the filter cartridge 10. The water from top to bottom in the filter cartridge 10 cleans the inner wall of the filter element 9 inside the filter cartridge 10 to remove the filter residue. The impurities accumulated on the inner wall of the filter element 9 reduce the impact of impurities on the filtration capacity of the filter element 9. Moreover, after removing the impurities on the filter element 9, the height of the filter element cylinder 10 within the docking sleeve 8 can be increased by rotating it to close the transmission channel 13. Furthermore, the second docking hole 14 is formed opposite in the inward and outward directions. Tap water entering the lower shell 2 from the water inlet 4 enters the space in the middle of the lower shell 2 through the second docking hole 14. At this time, the tap water flowing into the water purifier will be transmitted from the center of the lower shell 2 to the center of the upper shell 1, thereby forming a filtration structure that filters impurities in the tap water from the inside of the filter element 9 to the outside, and also restores the water purifier to normal water purification operation. The filtered tap water can be easily switched between the two working modes of the water purifier: filter element cleaning and normal filtration.

[0035] like Figures 5-8 As shown, the filter cartridge 10 consists of a cylinder 35 and a sleeve 36. The sleeve 36 is fitted onto the end of the cylinder 35 away from the second mating hole 14. The top of the sleeve 36 is a second partition 16. A positioning sleeve 17 is threaded onto the inner wall of the top of the upper shell 1. A gap is provided between the end of the positioning sleeve 17 near the water inlet 3 and the inner wall of the top of the upper shell 1. The edge of the second partition 16 is pressed into the gap. The edge of the second partition 16 has a plurality of first... The first partition 15 has three connecting holes 18. The edge of the first partition 15 is provided with several fourth connecting holes 19 along the circumferential direction of the first partition 15. The fourth connecting holes 19 and the third connecting holes 18 are misaligned vertically when the second partition 16 and the first partition 15 abut against each other. The bottom surface of the second partition 16 is provided with several first baffles 20 located outside the third connecting holes 18. The first baffles 20 and several second baffles 21 provided on the edge of the cylinder 35 are misaligned internally and externally when the filter element cylinder 10 is located at the lowest point inside the connecting sleeve 8.

[0036] When the fourth docking hole 19 and the third docking hole 18 are misaligned vertically, the second partition 16 and the first partition 15 form a sealed layer in the space above the cylinder 35, preventing the tap water from the outer cavity 6 from entering the space above the first partition 15. This guides the tap water from the outer cavity 6 to the top of the filter cartridge 10, and from the top of the filter cartridge 10, it washes the inner wall of the filter element 9 inside the filter cartridge 10 from top to bottom, washing away the impurities accumulated on the inner wall surface of the filter element 9. The misalignment of the first baffle 20 and the second baffle 21 in the inner and outer directions forms a sealing layer on the periphery of the cylinder 35, preventing the space in the middle of the filter cartridge 10 from communicating with the outer cavity 6.

[0037] like Figure 2 As shown, the space above the filter cartridge 10 is a first variable cavity 22 that communicates with the internal space of the filter cartridge 10. The volume of the first variable cavity 22 decreases as the height of the filter cartridge 10 increases.

[0038] The first variable cavity 22 is the main channel for tap water to flow to the top of the filter cartridge 10. When the volume of the first variable cavity 22 reaches its minimum value, tap water cannot enter the space above the filter cartridge 10 from the outer cavity 6.

[0039] like Figure 2 , Figure 5 , Figure 6 and Figure 7As shown, the top surface of the cylinder 35 is provided with two pushing blocks 23 that pass through the second partition 16 and the top of the upper shell 1 from low to high. The pushing blocks 23 are fixedly connected to the first partition 15. The second partition 16 outside the third docking hole 18 is provided with a first sliding groove 24 for cooperating with the pushing blocks 23. The top of the upper shell 1 is provided with a second sliding groove 25 with the same shape as the first sliding groove 24 for cooperating with the pushing blocks 23. The length of the first sliding groove 24 and the second sliding groove 25 in the circumferential direction is twice the length of the pushing blocks 23 in the circumferential direction. The top of the pushing blocks 23 is fixedly connected with a sealing plate 26 covering the opening at the upper end of the second sliding groove 25. The top surface of the sealing plate 26 is provided with a handle 38. The center of the first partition 15 is provided with a through hole 27.

[0040] The user applies external force to the push block 23 using the handle 38, causing the push block 23 to move from one side of the first slide groove 24 and the second slide groove 25 to the other side. The movement of the push block 23 in the first slide groove 24 and the second slide groove 25 will cause the cylinder 35 to rotate together. If the filter cartridge 10 is at its lowest height in the docking sleeve 8 at this time, the filter cartridge 10 will increase its height through the oblique cutting cooperation between the two oblique cutting blocks 11 during rotation. The increase in the position of the filter cartridge 10 in the docking sleeve 8 realizes the switching from the filter cartridge 9 cleaning mode to the normal water purification mode. The sealing plate 26 can seal the opening above the second slide groove 25 when the filter cartridge 9 is being cleaned, so that the second slide groove 25 will not leak water when the filter cartridge 9 is being cleaned, ensuring the sealing of the top of the upper shell 1.

[0041] like Figures 11-15 As shown, a second variable cavity 28 is formed between the first partition 15 and the second partition 16. The volume of the second variable cavity 28 increases as the height of the filter cartridge 10 increases. When the volume of the second variable cavity 28 reaches its maximum value, the first partition 15 abuts against the inner wall of the top of the upper shell 1 and seals the second sliding groove 25. The fourth docking hole 19 and the third docking hole 18 are vertically aligned in the height direction. The top surface of the cylinder 35 abuts against the bottom surface of the second partition 16. The through hole 27 is connected to the water inlet 3.

[0042] When the volume of the second variable cavity 28 reaches its maximum, the water purifier switches from the filter element 9 cleaning mode to the normal water purification mode. The first partition 15 abuts against the inner wall of the top of the upper shell 1 to seal the opening at the lower end of the second slide groove 25. When the fourth docking hole 19 and the third docking hole 18 are aligned vertically in the height direction, the second variable cavity 28 will communicate with the outer cavity 6. At this time, due to the rotation of the filter element cylinder 10, the first baffle 20 and the second baffle 21 will be aligned in the inner and outer directions. In contrast, the space in the middle of the filter cartridge 10 is connected to the outer cavity 6. The tap water flowing from bottom to top into the middle of the filter cartridge 10 flows into the inner side of the filter element 9. After being filtered by the filter element 9, it enters the outer cavity 6. Moreover, the top of the filter cartridge 10 abuts against the bottom of the second partition 16 to block the filtered tap water, thereby guiding the filtered tap water into the second variable cavity 28. After entering the second variable cavity 28, the filtered tap water enters the clean water outlet 3 through the through hole 27 for external use.

[0043] like Figures 9-11 As shown, the walls on opposite sides of the two oblique cut blocks 11 are composed of several fixed oblique cut surfaces 29 and movable oblique cut surfaces 30 distributed circumferentially along the center of the oblique cut block 11. The fixed oblique cut surfaces 29 and movable oblique cut surfaces 30 of the same oblique cut block 11 are connected in an interleaved manner, and their horizontal projections within the circumference of the oblique cut block 11 form a closed ring. The fixed oblique cut surfaces 29 connected to both ends of the movable oblique cut surface 30 within the same oblique cut block 11 are all at two different height positions. All fixed oblique cut surfaces 29 at the high position of the oblique cut block 11 are at the same height, and all fixed oblique cut surfaces 29 at the low position are at the same height. The projection of the movable oblique cut surface 30 on the vertical plane is an oblique line, and the projection of the fixed oblique cut surface 29 on the vertical plane is a straight line parallel to the horizontal plane.

[0044] In the filter element cleaning mode, the two fixed oblique cut surfaces 29 of the two oblique cut blocks 11, which are not at the same height, are in a relative state, thus forming a situation where the protrusions and grooves of the two oblique cut blocks 11 cooperate with each other. At this time, the overall height formed by the two oblique cut blocks 11 is the minimum, so that the height of the filter element cylinder 10 in the docking sleeve 8 is at the lowest value; for example Figures 11-15 As shown, in normal water purification mode, the two fixed oblique cut surfaces 29 of the two oblique cut blocks 11 at the same height are in a relative state, so that the protrusions of the two oblique cut blocks 11 are in a relative state. At this time, the overall height formed by the two oblique cut blocks 11 is the maximum, so that the height of the filter cartridge 10 in the docking sleeve 8 is at the maximum value. The height of the filter cartridge 10 in the docking sleeve 8 is adjusted by the oblique cutting cooperation of the two oblique cut blocks 11, so as to realize the switching between the two working modes of the water purifier: filter cartridge 9 cleaning mode and normal water purification mode.

[0045] like Figure 4 and Figure 7 As shown, the wall surface of the docking sleeve 8 outside the first docking hole 12 and the wall surface of the filter element cylinder 10 are both provided with a fifth docking hole 31. The bottom edge of the filter element cylinder 10 is a convex edge 32 and the fifth docking hole 31 is located at the edge of the convex edge 32. When the fifth docking hole 31 and the first docking hole 12 are vertically opposite each other in the height direction, the transmission channel 13 is in the open state.

[0046] In the filter element 9 cleaning mode, the transmission channel 13 is open. At this time, the height of the filter element cylinder 10 inside the docking sleeve 8 is at its lowest point, and the second docking hole 14 is misaligned in the inward and outward directions. This causes the tap water entering the lower shell 2 from the inlet 4 to be unable to enter the space in the middle of the lower shell 2. Therefore, the tap water in the lower shell 2 will enter the outer cavity 6 inside the upper shell 1 through the channel formed by the fifth docking hole 31 and the first docking hole 12, and then flow to the top of the filter element cylinder 10. Figure 12 As shown, in normal water purification mode, the first docking hole 12 on the oblique cut block 11 of the filter cartridge 10 and the fixed oblique cut surface 29 on the oblique cut block 11 of the docking sleeve 8 are in a relative state, thereby sealing the port of the first docking hole 12 on the oblique cut block 11 of the filter cartridge 10, thus closing the transmission channel 13. At this time, the height of the filter cartridge 10 inside the docking sleeve 8 is at its highest value, and the tap water entering the lower shell 2 from the water inlet 4 cannot be transmitted from the lower shell 2 to the outer cavity 6 through the transmission channel 13. The second docking holes 14 are opposite each other in the inward and outward directions. The tap water entering the lower shell 2 from the water inlet 4 enters the space in the middle of the lower shell 2 through the second docking holes 14. The tap water in the middle of the lower shell 2 enters the middle of the filter cartridge 10 from bottom to top, and flows from the middle of the filter cartridge 9 to the outer cavity 6 to achieve impurity filtration. The filtered tap water in the outer cavity 6 will not flow into the lower shell 2 through the fifth docking hole 31 on the protruding edge 32 and the first docking hole 12 on the oblique cut block 11 of the filter cartridge 10.

[0047] like Figure 12 As shown, a limiting sleeve 33 is provided inside the bottom end of the docking sleeve 8 by means of threaded engagement. The bottom surface of the limiting sleeve 33 abuts against the top surface of the protruding edge 32 when the height of the filter element cylinder 10 is raised to the highest point.

[0048] When the top surface of the protruding edge 32 abuts against the bottom surface of the limiting sleeve 33, the relative parallelism between the limiting sleeve 33 and the protruding edge 32, and the relative parallelism of the two fixed oblique cutting surfaces 29 at the same height in the two oblique cutting blocks 11, ensure that the water purifier can switch normally from the filter element 9 cleaning mode to the normal water purification mode.

[0049] like Figure 2 and Figure 12As shown, the bottom end of the docking sleeve 8 is docked with the docking cylinder 37 in the middle of the lower shell 2 by means of internal and external thread engagement. The water inlet end of the drain outlet 5 is fixedly connected to one side wall of the docking cylinder 37 and communicates with the inside of the docking cylinder 37. The internal space of the docking cylinder 37 near the water inlet end of the drain outlet 5 is provided with a third partition 34. The top surface of the third partition 34 is level with the lowest point of the drain hole inside the drain outlet 5.

[0050] In the filter element 9 cleaning mode, impurities flushed down from the middle of the filter element 9 by tap water enter the docking cylinder 37 from top to bottom along with the water. The water containing impurities is then discharged out of the water purifier by opening the drain port 5. The top surface of the third partition 34 is level with the lowest point of the through hole 27 inside the drain port 5, which makes it easier for the water containing impurities to flow from the docking cylinder 37 into the drain port 5. In the normal water purification mode, tap water entering from the second pair of interfaces at the docking position between the docking sleeve 8 and the docking cylinder 37 can also settle down to the third partition 34 by natural sedimentation.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A water purifier with a filter cleaning function, comprising an upper shell and a lower shell locked together by clamps, wherein the top of the upper shell is provided with a clean water inlet, and the side walls of the lower shell are respectively provided with a water inlet and a drain outlet communicating with the internal space of the lower shell, characterized in that, The internal space of the upper shell is divided at its center into an outer cavity and an inner cavity for water transmission. The inner cavity, near the lower shell, has a connecting sleeve for docking with the inner space of the lower shell. A filter cartridge with a hollow cylindrical filter element is fitted into the cavity in the middle of the connecting sleeve. The filter cartridge uses a beveled block fixedly connected to its bottom end to beveled with a beveled block fixedly connected to the middle of the connecting sleeve to adjust the height of the filter cartridge within the connecting sleeve. Both beveled blocks have first docking holes. When the two first docking holes are aligned vertically, a transmission channel connecting the outer cavity and the inner space of the lower shell is formed on the outside of the filter cartridge. The bottom ends of both the filter cartridge and the connecting sleeve have second docking holes that switch between relative and misaligned states when the filter cartridge rotates. The two second docking holes in the inward and outward directions achieve communication or separation between the inner space of the lower shell and the inner space of the filter cartridge by switching between relative and misaligned states. The upper shell cavity near the water inlet... The chamber is equipped with a first partition that controls the communication between the outer cavity and the water inlet or the inside of the filter cartridge. The filter cartridge consists of a cylinder and a sleeve. The sleeve is fitted onto the end of the cylinder away from the second docking hole. The top of the sleeve is the second partition. The inner wall of the top of the upper shell is fitted with a positioning sleeve by means of a threaded engagement. There is a gap between the end of the positioning sleeve near the water inlet and the inner wall of the top of the upper shell. The edge of the second partition is pressed into the gap. The edge of the second partition has several third docking holes along the circumferential direction of the second partition. The edge of the first partition has several fourth docking holes along the circumferential direction of the first partition. The fourth docking holes and the third docking holes are vertically misaligned when the second partition and the first partition abut against each other. The bottom surface of the second partition has several first baffles located outside the third docking holes. The first baffles and the several second baffles set on the edge of the cylinder are internally and externally misaligned when the filter cartridge is located at the lowest point inside the docking sleeve.

2. A water purifier with filter cleaning function according to claim 1, characterized in that, The space above the filter cartridge is a first variable cavity that communicates with the internal space of the filter cartridge. The volume of the first variable cavity decreases as the height of the filter cartridge increases.

3. A water purifier with filter cleaning function according to claim 1, characterized in that, The top surface of the cylinder is provided with two pushing blocks that pass through the second partition and the top of the upper shell from low to high. The pushing blocks are fixedly connected to the first partition. The second partition outside the third docking hole is provided with a first sliding groove for cooperating with the pushing blocks. The top of the upper shell is provided with a second sliding groove with the same shape as the first sliding groove for cooperating with the pushing blocks. The length of the first sliding groove and the second sliding groove in the circumferential direction is twice the length of the pushing block in the circumferential direction. A sealing plate covering the opening at the top of the second sliding groove is fixedly connected to the top of the pushing block. The top surface of the sealing plate is provided with a handle. The center of the first partition is provided with a through hole.

4. A water purifier with filter cleaning function according to claim 3, characterized in that, A second variable cavity is formed between the first partition and the second partition. The volume of the second variable cavity increases as the height of the filter cartridge increases. When the volume of the second variable cavity reaches its maximum value, the first partition abuts against the inner wall of the top of the upper shell and seals the second sliding groove. The fourth docking hole and the third docking hole are vertically aligned in the height direction. The top surface of the cartridge abuts against the bottom surface of the second partition. The through hole is connected to the clean water outlet.

5. A water purifier with filter cleaning function according to claim 1, characterized in that, The opposing walls of the two oblique cut blocks are composed of several fixed oblique cut surfaces and moving oblique cut surfaces distributed circumferentially along the center of the oblique cut blocks. The fixed oblique cut surfaces and moving oblique cut surfaces of the same oblique cut block are connected in an interleaved manner, and their horizontal projection within the circumference of the oblique cut block forms a closed ring. The fixed oblique cut surfaces connected to the two ends of the moving oblique cut surface within the same oblique cut block are all located at two different height positions. All fixed oblique cut surfaces at the high position of the oblique cut block are located at the same height, and all fixed oblique cut surfaces at the low position are located at the same height. The projection of the moving oblique cut surface on the vertical plane is an oblique line, and the projection of the fixed oblique cut surface on the vertical plane is a straight line parallel to the horizontal plane.

6. A water purifier with filter cleaning function according to claim 1, characterized in that, The outer wall of the first docking hole and the wall of the filter element cylinder are both provided with a fifth docking hole. The bottom edge of the filter element cylinder is a convex edge and the fifth docking hole is located on the edge of the convex edge. When the fifth docking hole and the first docking hole are vertically opposite each other in the height direction, the transmission channel is in the open state.

7. A water purifier with filter cleaning function according to claim 6, characterized in that, The bottom end of the connecting sleeve is provided with a limiting sleeve by means of thread engagement. The bottom surface of the limiting sleeve abuts against the top surface of the convex edge when the height of the filter element cylinder is raised to the highest point.

8. A water purifier with filter cleaning function according to claim 1, characterized in that, The bottom end of the docking sleeve is docked with the docking cylinder in the middle of the lower shell by means of internal and external thread engagement. The water inlet end of the drain outlet is fixedly connected to one side wall of the docking cylinder and communicates with the inside of the docking cylinder. The internal space of the docking cylinder near the water inlet end of the drain outlet is provided with a third partition. The top surface of the third partition is level with the lowest point of the drain hole inside the drain outlet.

Images