A multi-stage reverse osmosis water purifier

Abstract

The application discloses a multi-stage reverse osmosis water purifier, which comprises a shell, a mounting cavity arranged in the shell, a filter cartridge arranged in the mounting cavity, a liquid outlet arranged at the center of the lower end of the filter cartridge, a liquid inlet arranged at the eccentric position of the lower end of the filter cartridge, a perforated core pipe rotatably arranged in the filter cartridge, a filter core sleeved outside the perforated core pipe, the lower end of the perforated core pipe being communicated with the liquid outlet, and a flow control assembly arranged at the lower side of the filter cartridge and communicated with the liquid inlet, the flow control assembly being driven to rotate with the perforated core pipe to switch the water flow between being guided from the lower side of the filter cartridge and being guided from the upper side of the filter cartridge. The perforated core pipe is rotated under the driving of the driving assembly to drive the flow control assembly to switch the water flow guided from the lower side of the filter cartridge to the upper side of the filter cartridge, so that the problem that the lower half of the filter core is rapidly blocked due to the single-position water guiding is solved, and the filter core can be fully utilized, and the service life of the filter core is prolonged.

Description

Technical Field

[0001] This invention relates to the field of water purifier technology, specifically to a multi-stage reverse osmosis water purifier. Background Technology

[0002] A water purifier is a water treatment device that deeply purifies water according to the requirements of water use. Its working principle is to introduce raw water into the filter cartridge. Under pressure, water molecules and beneficial minerals pass through the filter cartridge and flow out. After multiple stages of filtration, it becomes purified water, while harmful substances such as bacteria, colloids, rust, and suspended solids are trapped in the filter cartridge, thereby achieving the effect of filtration and purification. Existing water purifiers can basically meet the needs of daily use, but there are still some shortcomings that need to be improved.

[0003] Patent document CN109110840A, published on January 1, 2019, discloses a multi-stage water purifier with easy filter replacement. The purifier includes a main body and filter cartridges. The base of the main body has an insertion hole, a raw water inlet, and a purified water outlet. The filter cartridges are inserted into the insertion hole, which contains an inlet column and an outlet column. The lower end of the filter cartridge has a filter inlet hole and a filter outlet hole. Water-locking components are installed in both the inlet column and the filter inlet hole, as well as in the outlet column and the filter outlet hole. When the inlet column and the outlet column are inserted into the filter inlet hole and the filter outlet hole respectively, both sets of water-locking components open, allowing water to flow through and connecting the filter cartridges in series in the water path. This invention prevents residual water from flowing out when replacing the filter cartridges, and also prevents cross-flow of inlet and outlet water during purification, as well as leakage at the filter cartridge joints.

[0004] In the prior art as described in the aforementioned patent, the positions of the water inlet and outlet filter cartridges are close, and the position of the water inlet inside the filter cartridge is fixed. Most of the water is filtered by the filter cartridge near the inlet position before being introduced into the outlet direction, which causes a portion of the filter cartridge to be consumed quickly and become blocked. The filter cartridge as a whole cannot be fully utilized. Therefore, there is an urgent need for a multi-stage reverse osmosis water purifier to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-stage reverse osmosis water purifier to overcome the aforementioned shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A multi-stage reverse osmosis water purifier includes a housing and further includes: a mounting cavity disposed within the housing; a filter cartridge disposed within the mounting cavity, having an outlet at the center of its lower end and an inlet at an eccentric position at its lower end; a perforated core tube rotatably disposed within the filter cartridge, with a filter element sleeved on its outer side, and its lower end communicating with the outlet; a flow control assembly disposed on the lower side inside the filter cartridge, maintaining communication with the inlet, and guided by the rotation of the perforated core tube to switch the water flow between being introduced from the lower side of the filter cartridge or from the upper side of the filter cartridge; and a drive assembly for driving the perforated core tube to rotate.

[0008] Preferably, the flow control assembly includes a rotating component disposed on the lower side of the filter element and coaxially fixedly connected to the perforated core tube. A partition ring fixed to the inner wall of the filter cartridge is fitted onto the upper side of the rotating component. The partition ring has a plurality of first through holes circumferentially disposed on its upper side. A second through hole matching the first through holes is disposed at the upper end of the rotating component. A flow guiding assembly is disposed on the side wall of the filter cartridge. The two ends of the flow guiding assembly are respectively connected to the upper and lower sides of the side wall of the filter cartridge, and the end connected to the lower side of the filter cartridge corresponds to the side wall of the rotating component. A third through hole is disposed on the side wall of the rotating component. As the perforated core tube rotates, the connection between the first through hole and the second through hole and the connection between the flow guiding assembly and the third through hole are switched.

[0009] Preferably, the flow guiding assembly includes a flow guiding tube disposed inside the housing, the upper end of the flow guiding tube being connected to the upper part of the filter cartridge sidewall via a first inlet, and the lower end of the flow guiding tube being connected to the lower sidewall of the filter cartridge via a flexible tube.

[0010] Preferably, the first nozzle is movably disposed through the side wall of the filter cartridge, and its end is detachably connected to the upper end of the guide tube.

[0011] Preferably, the lower side wall of the filter cartridge is provided with a fourth through hole that matches the third through hole, and the end of the hose away from the guide pipe is provided with a second plug that is detachably connected to the fourth through hole.

[0012] Preferably, the filter cartridge is provided with a cover at the upper end, the drive assembly includes a knob that is rotatably disposed on the cover, a pressure plate that is elastically disposed on the lower side of the knob, and a synchronously rotating swivel block that is coaxially inserted into the upper end of the perforated core tube, and the pressure plate and the swivel block are in damped contact.

[0013] Preferably, the inner wall of the filter cartridge is rotatably connected to a plurality of circumferentially uniformly arranged guide vanes, which rotate synchronously and divide the space between the filter cartridge and the filter element into upper and lower regions.

[0014] Preferably, a rotating groove is formed in the side wall of the filter cartridge, and a toothed ring is rotatably arranged in the rotating groove. A bevel gear that is coaxially connected to the rotating shaft of the guide vane is meshed on the lower side of the toothed ring. A slider is fixedly arranged on the upper side of the toothed ring, and a sliding groove that matches the slider is provided in the side wall of the filter cartridge. An elastic element that hinders the movement of one side of the slider is provided in the sliding groove.

[0015] Preferably, the cylinder cover and the knob are connected by a coil spring, and a limiting component for limiting the rotation of the knob is provided inside the cylinder cover. The action of the limiting component to cancel the limiting action is linked to the movement of the slider.

[0016] Preferably, the limiting component includes a limiting post that is movably and vertically mounted on the cylinder cover, a retaining plate fixedly mounted on the side wall of the knob, a movable groove matching the retaining plate inside the cylinder cover, the limiting post passing through the movable groove to be in the movable stroke of the retaining plate, and a notch matching the retaining plate on the limiting post. When the slider moves to compress the elastic element to a certain extent, the limiting post rises in conjunction to make the notch correspond to the height of the retaining plate.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] This multi-stage reverse osmosis water purifier features a rotatable perforated core tube. Driven by the drive assembly, the perforated core tube rotates, causing the flow control assembly to switch the water flow from the bottom of the filter cartridge to the top. This solves the problem of rapid blockage of the lower half of the filter cartridge due to flow in a single location, thus making full use of all height sections of the filter cartridge and extending its service life.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0020] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0023] Figure 2 This is a side view cross-sectional structural schematic diagram provided in an embodiment of the present invention;

[0024] Figure 3 Provided for embodiments of the present invention Figure 2 Enlarged structural diagram at point A;

[0025] Figure 4 Provided for embodiments of the present invention Figure 2 Enlarged structural diagram at point B;

[0026] Figure 5 This is a schematic diagram of the rear cross-sectional structure provided in an embodiment of the present invention;

[0027] Figure 6 Provided for embodiments of the present invention Figure 5 Enlarged structural diagram at point C;

[0028] Figure 7 Provided for embodiments of the present invention Figure 5 Enlarged structural diagram at point D;

[0029] Figure 8 This is a schematic diagram of the internal structure of the filter cartridge provided in an embodiment of the present invention;

[0030] Figure 9 This is a top cross-sectional view of the limiting component provided in an embodiment of the present invention;

[0031] Figure 10 This is a top cross-sectional view of the slide provided in an embodiment of the present invention;

[0032] Figure 11 This is a top cross-sectional view of the positioning groove provided in an embodiment of the present invention;

[0033] Figure 12 This is a schematic diagram of the filter cartridge assembly structure provided in an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Shell; 2. Mounting cavity; 3. Filter cartridge; 4. Outlet; 5. Inlet; 6. Perforated core tube; 7. Filter element; 8. Rotating component; 9. Separating ring; 10. First through hole; 11. Second through hole; 12. Third through hole; 13. Guide tube; 14. First inlet; 15. Hose; 16. Fourth through hole; 17. Second inlet; 18. Cylinder cover; 19. Knob; 20. Pressure plate; 21. Rotating block; 22. Guide vane; 23. Rotating groove; 24. Gear ring; 25. Bevel gear; 26. Slider; 27. Slide groove; 28. Elastic component; 29. ​​Coil spring; 30. Limiting post; 31. Clamping plate; 32. Movable groove; 33. Notch; 34. Telescopic rod; 35. Positioning block; 36. Positioning groove; 37. Concave ring groove; 38. Ring body; 39. Top rod; 40. Slope block. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0037] Please see Figure 1-12 This invention provides a multi-stage reverse osmosis water purifier, comprising a housing 1, and further comprising: a mounting cavity 2 disposed within the housing 1; a filter cartridge 3 disposed within the mounting cavity 2, having an outlet 4 at the center of its lower end and an inlet 5 at an eccentric lower end; a perforated core tube 6 rotatably disposed within the filter cartridge 3, with a filter element 7 sleeved on its outer side, and its lower end communicating with the outlet 4; a flow control assembly disposed on the lower side inside the filter cartridge 3, maintaining communication with the inlet 5, and being driven by the rotation of the perforated core tube 6 to guide the water flow between being introduced from the lower side of the filter cartridge 3 and being introduced from the upper side of the filter cartridge 3; and a drive assembly for driving the perforated core tube 6 to rotate.

[0038] Specifically, the front of the housing 1 has a water receiving area, above which is the control panel, and below which is a kettle base for holding a kettle. It is used after being powered on. The mounting cavity 2 is located on the back of the housing 1, and has multiple horizontally arranged cavities corresponding to different filtration functions. The filter cartridge 3 is detachably installed in the mounting cavity 2. Specifically, the upper end of the filter cartridge 3 has a flange that limits its height after it is inserted into the mounting cavity 2 from top to bottom. The liquid outlet 4 corresponds to the perforated core tube 6, meaning the perforated core tube 6 is located at the axial position inside the filter cartridge 3. The liquid inlet 5 is located at an eccentric position, directly guiding the water flow to the space between the filter cartridge 3 and the filter element 7. The perforated core tube 6 extends in the following directions... Multiple small holes are evenly arranged to guide the filtered water flow to the outlet 4. The perforated core tube 6 is rotatably sleeved on the upper end of the outlet 4 extending into the filter cartridge 3 and is sealed. The filter element 7 is cylindrical, hollow in the middle and matched with the perforated core tube 6. Its outer diameter is smaller than the inner diameter of the filter cartridge 3 to form a gap. The water flow mainly flows through the outer wall of the filter element 7 to the hollow center of the filter element 7, that is, it flows into the perforated core tube 6 after being filtered by the filter element 7. The flow control component receives the water flow introduced by the inlet 5 and then selects to guide it to the lower or upper side of the filter cartridge 3, thereby realizing the switching of the water flow introduction position. The drive component drives the perforated core tube 6 to rotate, and then the perforated core tube 6 drives the flow control component to switch the water flow introduction position. In practical use, when the water flow from the inlet 5 is initially directed towards the lower side of the filter cartridge 3, the filter element 7 operates normally. However, after a period of use, when the lower half of the filter element 7 is consumed and becomes blocked, the perforated core tube 6 is rotated by the drive component. This causes the flow control component to switch the water flow from the lower side of the filter cartridge 3 to the upper side, thus solving the problem of rapid blockage of the lower half of the filter element 7 due to flow at a single location. This allows for full utilization of all height sections of the filter element 7 and extends its service life.

[0039] Compared with the prior art, the multi-stage reverse osmosis water purifier proposed in this embodiment of the invention is equipped with a rotatable perforated core tube 6. Under the drive of the drive component, the perforated core tube 6 rotates, thereby driving the flow control component to switch the water flow introduced into the inlet 5 from the lower side of the filter cartridge 3 to the upper side of the filter cartridge 3. This solves the problem of rapid blockage of the lower half of the filter cartridge 7 caused by the flow guide at a single position. In addition, it can make full use of each height part of the filter cartridge 7, extend the service life of the filter cartridge 7, and improve the practicality of the device.

[0040] As a preferred embodiment, the flow control assembly includes a rotating component 8 disposed on the lower side of the filter element 7 and coaxially fixedly connected to the perforated core tube 6. A partition ring 9 fixed to the inner wall of the filter cartridge 3 is fitted onto the upper side of the rotating component 8. The partition ring 9 has a plurality of first through holes 10 circumferentially arranged on its upper side. A second through hole 11 matching the first through holes 10 is provided at the upper end of the rotating component 8. A flow guiding assembly is provided on the side wall of the filter cartridge 3. The two ends of the flow guiding assembly are respectively connected to the upper and lower sides of the side wall of the filter cartridge 3, and the end connected to the lower side of the filter cartridge 3 corresponds to the rotating component 8. The rotating part 8 has a third through hole 12 on its side wall. As the perforated core tube 6 rotates, the connection between the first through hole 10 and the second through hole 11, and the flow guiding component, switches between the first and second through holes and the third through hole 12. Specifically, the rotating part 8 is a dome-shaped structure with an open lower end. Its outer diameter matches the inner diameter of the filter cartridge 3. The lower end of the perforated core tube 6 is located on the lower side of the rotating part 8 and is rotatably connected to the liquid outlet 4. The upper end of the liquid inlet 5 extends into the interior of the filter cartridge 3 and is located on the lower side of the rotating part 8. The separating ring 9 fits against the upper side of the rotating part 8. When the rotating component 8 rotates and completely misaligns the first through hole 10 and the second through hole 11, the space between the lower side of the rotating component 8 and the upper side of the separator ring 9 is disconnected; the inner diameter of the separator ring 9 matches the outer diameter of the filter element 7; the first through holes 10 are evenly arranged on the separator ring 9 around their circumference, with a certain arc interval between two adjacent first through holes 10, and the second through holes 11 are matched one-to-one with the first through holes 10. The above interval setting helps to achieve complete misalignment between the first through holes 10 and the second through holes 11; the flow guiding component is used to guide the flow of the filter element 8. The side space is directly connected to the upper part of the filter cartridge 3 through the lower part of the filter cartridge 3; the third through hole 12 rotates with the rotating member 8 to form an overlap or a certain angle of misalignment on the rotating surface to control the connection and disconnection with the flow guiding component, and the connection and disconnection are staggered with the first through hole 10 and the second through hole 11. That is, when the first through hole 10 and the second through hole 11 are fully connected, the third through hole 12 is not connected with the flow guiding component, and when the third through hole 12 is fully connected with the flow guiding component, the first through hole 10 and the second through hole 11 are not connected.

[0041] As a preferred technical solution in this embodiment, the flow guiding assembly includes a flow guiding tube 13 disposed inside the housing 1. The upper end of the flow guiding tube 13 is connected to the upper part of the side wall of the filter cartridge 3 through a first insert 14, while the lower end of the flow guiding tube 13 is connected to the lower side wall of the filter cartridge 3 through a flexible hose 15. Specifically, the main body of the flow guiding tube 13 is axially arranged parallel to the mounting cavity 2, and the upper end of the flow guiding tube 13 is bent radially toward the mounting cavity 2. The first insert 14 is inserted into the filter cartridge 3 and extends outward from the filter cartridge 3. When the filter cartridge 3 is installed into the mounting cavity 2, the first insert 14... The inlet 14 should correspond to the upper end of the guide tube 13, and then the first inlet 14 should be connected to the upper end of the guide tube 13. This can also limit and fix the filter cartridge 3 in the mounting cavity 2. The housing 1 is provided with an equipment area corresponding to the lower end of the mounting cavity 2, which is used to install the water pump, wastewater combination valve, water inlet solenoid valve and various conduits. The lower end of the filter cartridge 3 extends to the equipment area, and the third through hole 12 is also at the height of the equipment area. The hose 15 is connected to the guide tube 13 at one end in the equipment area, and the other end is connected to the side wall of the filter cartridge 3 at the height of the third through hole 12.

[0042] As a further preferred technical solution of this embodiment, the first insert 14 is movably disposed through the side wall of the filter cartridge 3, and its end is detachably connected to the upper end of the guide tube 13. Specifically, the end of the first insert 14 extending out of the side wall of the filter cartridge 3 is provided with an external thread, and the inner wall of the upper end of the guide tube 13 is provided with a corresponding internal thread. When the filter cartridge 3 is disassembled or installed in the mounting cavity 2, the filter element 7 is removed first, and then the first insert 14 can be rotated from inside the filter cartridge 3 to connect or disconnect it from the guide tube 13.

[0043] As a further preferred technical solution in this embodiment, a fourth through hole 16 matching the third through hole 12 is provided on the lower side wall of the filter cartridge 3. A second inlet 17 detachably connected to the fourth through hole 16 is provided at the end of the hose 15 away from the guide tube 13. Specifically, the second inlet 17 and the fourth through hole 16 can also be screwed together, in which case the second inlet 17 is rotatably connected to one end of the hose 15, or the second inlet 17 and the fourth through hole 16 are connected by an interference fit, in which case the second inlet 17 has a certain degree of elasticity. The above arrangement of the flow guiding components, under the condition of satisfying the flow guiding, does not hinder the disassembly and installation of the filter cartridge 3 in the mounting cavity 2.

[0044] In another embodiment of the present invention, a cover 18 is provided on the upper end of the filter cartridge 3. The driving assembly includes a knob 19 rotatably disposed on the cover 18, a pressure plate 20 elastically movably disposed on the lower side of the knob 19, and a synchronously rotating rotating block 21 coaxially inserted into the upper end of the perforated core tube 6. The pressure plate 20 and the rotating block 21 are in damped contact. Specifically, the cover 18 is threadedly connected to the filter cartridge 3; the cover 18 connects to the upper part of the filter cartridge 3 extending out of the mounting cavity 2; the knob 19 is coaxially rotatably connected to the center of the cover 18; a retraction cavity is provided on the lower side of the knob 19, and the upper end of the pressure plate 20 is movably connected to the retraction cavity through a telescopic rod 34. The telescopic rod 34 is polygonal prism-shaped to allow the pressure plate 20 to extend and retract, and to allow the pressure plate 20 to rotate with the knob 19; the upper side of the pressure plate 20 is connected to the retraction cavity. A spring connects the inner walls of the retraction chamber, thereby keeping the pressure plate 20 automatically extended out of the retraction chamber. When the cylinder cover 18 is tightened on the filter cylinder 3, the telescopic rod 34 retracts a certain length, and the pressure plate 20 maintains the elastic force against the rotating block 21. The damping contact between the pressure plate 20 and the rotating block 21 satisfies the requirement that when the pressure plate 20 rotates with the knob 19, the pressure plate 20 drives the rotating block 21 to rotate through friction damping, thereby driving the perforated core tube 6 to rotate. The rotating block 21 includes a circular plate part that contacts the pressure plate 20 and an insertion part that inserts the perforated core tube 6. The insertion part is preferably prismatic. The upper end of the perforated core tube 6 is provided with an insertion hole that matches the insertion part, thereby satisfying the needs of torque transmission and disassembly. The detachable rotating block 21 facilitates the installation and disassembly of the filter element 7 on the perforated core tube 6. Furthermore, the rotation range of the rotating component 8 within the filter cylinder 3 is limited. Specifically, a positioning block 35 is provided on the outer wall of the rotating component 8 away from the fourth through hole 16, and a positioning groove 36 matching the positioning block 35 is provided on the inner wall of the filter cylinder 3. The positioning block 35 slides only within the positioning groove 36 to limit the rotation range of the rotating component 8 to 30°-90°. At both ends of this range, the first through hole 10 and the second through hole 11 are fully connected, and the third through hole 12 and the fourth through hole 16 are fully connected, respectively.

[0045] In another embodiment of the present invention, a plurality of circumferentially uniformly arranged guide vanes 22 are rotatably connected to the inner wall of the filter cartridge 3. The plurality of guide vanes 22 rotate synchronously and divide the space between the filter cartridge 3 and the filter element 7 into upper and lower regions. Specifically, the plurality of guide vanes 22 divide the space between the filter cartridge 3 and the filter element 7 into upper and lower regions. When the water flow introduced by the inlet 5 enters from the lower side of the filter cartridge 3, part of the water flow flows upward through the guide vanes 22, which can push the guide vanes 22 to rotate upward. When the water flow introduced by the inlet 5 enters from the upper side of the filter cartridge 3, the water flow flows downward through the guide vanes 22, which pushes the guide vanes 22 to rotate downward. The arrangement of the guide vanes 22 ensures that the water flow is more concentrated in the designated area, further satisfying the function of fully utilizing the filter element 7.

[0046] As a preferred embodiment, a rotating groove 23 is provided inside the side wall of the filter cartridge 3. A toothed ring 24 is rotatably disposed inside the rotating groove 23. A bevel gear 25, coaxially connected to the rotating shaft of the guide vane 22, is meshed with the lower side of the toothed ring 24. A slider 26 is fixedly disposed on the upper side of the toothed ring 24. A sliding groove 27 matching the slider 26 is provided inside the side wall of the filter cartridge 3. An elastic element 28 is provided inside the sliding groove 27 to hinder the movement of the slider 26 on one side. Specifically, the rotating groove 23 is sleeved on the outside of the internal space of the filter cartridge 3. The meshing of the toothed ring 24 with each bevel gear 25 realizes the synchronous rotation of each guide vane 22. The elastic element 28 can preferably be a spring. The direction of movement of the slider 26 is as follows: when the guide vane 22 rotates upward, it is transmitted to the direction of movement of the slider 26, but it does not affect the direction of movement of the slider 26 on the other side. The range of movement of the slider 26 in the groove 27 limits the range of upward or downward rotation of the guide vane 22 to no more than 90°. The resistance of the elastic element 28 to the slider 26, that is, the resistance to the upward rotation of the guide vane 22, causes the lower half of the filter element 7 to be consumed to a certain extent after a period of time when the water flow introduced by the inlet 5 enters from the lower side of the filter cartridge 3, and blockage occurs. Then the water flow through the guide vane 22 increases, which can push the guide vane 22 which is resisted by the elastic force.

[0047] As a preferred technical solution in this embodiment, the cylinder cover 18 and the knob 19 are connected by a coil spring 29. A limiting component is provided inside the cylinder cover 18 to limit the rotation of the knob 19. The action of the limiting component to cancel the limiting action is linked to the movement of the slider 26. Specifically, the cooperation between the coil spring 29 and the limiting component allows the knob 19 to store the potential energy of its rotational tendency. Before the cylinder cover 18 is installed, the knob 19 stores rotational potential energy and is limited by the limiting component. During the installation of the cylinder cover 18, the knob 19 is fixed relative to the cylinder cover 18, and the cylinder cover 18 rotates clockwise. During the installation process, as the cylinder cap 18 is tightened, the pressure plate 20 contacts the rotating block 21, generating frictional damping. At this time, the pressure plate 20 causes the rotating block 21 to rotate in the same direction, which in turn drives the perforated core tube 6 and the rotating component 8 to rotate. This causes the first through hole 10 and the second through hole 11 to gradually align or remain aligned, while the third through hole 12 and the fourth through hole 16 gradually shift or remain shifted. Until the cylinder cap 18 is tightened, under the damping effect between the pressure plate 20 and the rotating block 21, the first through hole 10 and the second through hole 11 are completely aligned, and the third through hole 12 and the fourth through hole 16 are gradually shifted. 6. Completely offset; at this time, the rotational potential energy stored in knob 19 is exactly opposite to the rotation direction when the cylinder cover 18 is installed. Therefore, when slider 26 moves to trigger the limit component to cancel the limit, the rotation of knob 19 relative to cylinder cover 18 can drive the rotating part 8 to rotate through pressure plate 20, rotating block 21, and perforated core tube 6, so that switching to the first through hole 10 and the second through hole 11 are completely offset, and the third through hole 12 and the fourth through hole 16 are completely aligned; the direction of slider 26 triggering the limit component to cancel the limit corresponds to the slider 26 compressing the elastic element 2. The direction of movement of 8 corresponds to the upward rotation of the guide vane 22 to a certain extent. In other words, after the water flow introduced into the inlet 5 enters from the lower side of the filter cartridge 3 and is used for a period of time, the lower half of the filter element 7 is consumed to a certain extent, causing blockage. The water flow through the guide vane 22 increases to a certain extent to satisfy the upward push of the guide vane 22 to a certain angle, thereby triggering the movement of the slider 26, which in turn triggers the limit component to cancel the limit function, realizing the automatic control of the water flow introduction position switching according to the blockage of the lower part of the filter element 7.

[0048] As a preferred technical solution in this embodiment, the limiting component includes a limiting post 30 that is movably and vertically mounted on the cover 18, a retaining plate 31 fixedly mounted on the side wall of the knob 19, and a movable groove 32 matching the retaining plate 31 inside the cover 18. The limiting post 30 passes through the movable groove 32 to be within the movable stroke of the retaining plate 31. The limiting post 30 has a notch 33 matching the retaining plate 31. When the slider 26 moves to press the elastic element 28 to a certain extent, the limiting post 30 rises in conjunction to make the notch 33 correspond to the height of the retaining plate 31. Specifically, the upper and lower ends of the limiting post 30 are provided with columns that movably pass through the cover 18, and the limiting post 30 does not rotate. The retaining plate 31 moves... The range of motion within the groove 32 corresponds to the rotation range of the rotating component 8. When the notch 33 on the limiting post 30 does not correspond to the height of the movable groove 32, one side of the clamping plate 31 abuts against the limiting post 30 to limit the position. At this time, the knob 19 stores rotational potential energy. When the notch 33 on the limiting post 30 corresponds to the movable groove 32, the rotational potential energy of the knob 19 can be released. The knob 19 drives the clamping plate 31 to rotate, and the edge of the clamping plate 31 can move smoothly through the notch 33. In addition, the clamping plate 31 is embedded in the notch 33, which in turn limits the height of the limiting post 30. The upper end of the limiting post 30 remains protruding from the cap 18 to serve as a reminder. The user can use this to determine that the filter element 7 has less than half its lifespan. Furthermore, the upper end of the filter cartridge 3 is provided with a concave annular groove 37. When the cartridge cover 18 is tightened and the limiting post 30 is kept at its lowest height to limit the plate 31, the lower end of the limiting post 30 extends into the concave annular groove 37. A ring body 38 is movably arranged in the concave annular groove 37, and the ring body 38 corresponds to the lower end of the limiting post 30. A top rod 39 is fixedly provided at the lower end of the ring body 38. A ramp 40 is provided at the upper end of the slider 26. The lower end of the top rod 39 extends movably into the rotating groove 23 and wedges with the ramp 40. In actual use, the guide vane 22 is pushed upward by the upward flowing water and rotates upward, thereby linking the slider 26 to squeeze the elastic element 28. When the slider 26 passes through this direction After moving a certain distance, the wedge-shaped compression between the ramp 40 and the lower end of the push rod 39 causes the push rod 39 to drive the ring 38 to rise. The ring 38 then pushes the limiting post 30 to rise, so that the height of the notch 33 corresponds to the movable groove 32. This removes the limitation on the clamping plate 31, releases the rotational potential energy of the knob 19, and switches the water flow guide of the inlet 5 from the lower side of the filter cartridge 3 to the upper side of the filter cartridge 3. Then, the filter element 7 can be fully utilized, and the influence of the corresponding water flow rate caused by the blockage at the lower end of the filter element 7 can be reduced. In addition, the water flow in this direction mainly flows downward, and the obstruction of the downward water flow by the guide plate 22 is not affected by the elastic element 28, so that the lower part of the filter element 7 can also be fully utilized.

[0049] Furthermore, forming a rotating groove 23 and a sliding groove 27 in the solid wall of the filter cartridge 3 for assembling linkage components such as a gear ring 24, a bevel gear 25, and a slider 26 is not a conventional arrangement. For ease of assembly, the filter cartridge 3 preferably adopts a segmented structure, namely, an upper section 301 and a lower section 302. The outer wall of the lower section 302 is machined with grooves and holes such as the rotating groove 23 and the sliding groove 27. After assembling the components on the outer wall of the lower section 302, the upper section 301 is threaded onto the lower section 302, thereby facilitating assembly. Furthermore, the lower section 302 has holes on its inner wall for sealing after the parts are assembled, and the joint between the upper section 301 and the lower section 302 is also threaded and sealed.

[0050] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-stage reverse osmosis water purifier, comprising a housing (1), characterized in that, Also includes: The mounting cavity (2) is located inside the housing (1); The filter cartridge (3) is installed in the mounting cavity (2), with an outlet (4) at the center of its lower end and an inlet (5) at the eccentric part of its lower end. A perforated core tube (6) is rotatably installed inside a filter cylinder (3), and a filter element (7) is sleeved on its outer side. Its lower end is connected to the liquid outlet (4). The flow control component is located inside the lower side of the filter cartridge (3) and is connected to the liquid inlet (5). It is driven by the rotation of the perforated core tube (6) to guide the water flow to switch between being introduced from the lower side of the filter cartridge (3) or from the upper side of the filter cartridge (3). A drive assembly for driving the perforated core tube (6) to rotate; The flow control assembly includes a rotating component (8) disposed on the lower side of the filter element (7) and coaxially fixedly connected to the perforated core tube (6). A partition ring (9) fixed to the inner wall of the filter cylinder (3) is attached to the upper side of the rotating component (8). Multiple first through holes (10) are provided on the circumference of the partition ring (9). A second through hole (11) matching the first through hole (10) is provided at the upper end of the rotating component (8). A flow guiding assembly is provided on the side wall of the filter cylinder (3). The two ends of the flow guiding assembly are respectively connected to the upper and lower sides of the side wall of the filter cylinder (3), and the end connected to the lower side of the filter cylinder (3) corresponds to the side wall of the rotating component (8). A third through hole (12) is provided on the side wall of the rotating component (8). When the perforated core tube (6) rotates, the connection between the first through hole (10) and the second through hole (11) and the connection between the flow guiding assembly and the third through hole (12) are switched.

2. The multi-stage reverse osmosis water purifier according to claim 1, characterized in that, The flow guiding assembly includes a flow guiding tube (13) disposed inside the housing (1). The upper end of the flow guiding tube (13) is connected to the upper part of the side wall of the filter cartridge (3) through a first plug (14), and the lower end of the flow guiding tube (13) is connected to the lower side of the side wall of the filter cartridge (3) through a hose (15).

3. The multi-stage reverse osmosis water purifier according to claim 2, characterized in that, The first inlet (14) is disposed through the side wall of the filter cartridge (3) and its end is detachably connected to the upper end of the guide tube (13).

4. The multi-stage reverse osmosis water purifier according to claim 2, characterized in that, The filter cartridge (3) has a fourth through hole (16) on the lower side wall that matches the third through hole (12), and the hose (15) has a second plug (17) that is detachably connected to the fourth through hole (16) at one end away from the guide tube (13).

5. The multi-stage reverse osmosis water purifier according to claim 1, characterized in that, The filter cartridge (3) is provided with a cover (18) at the upper end. The drive assembly includes a knob (19) that is rotatably provided on the cover (18). A pressure plate (20) is elastically provided on the lower side of the knob (19). A synchronously rotating swivel block (21) is coaxially inserted into the upper end of the perforated core tube (6). The pressure plate (20) and the swivel block (21) are in damped contact.

6. The multi-stage reverse osmosis water purifier according to claim 5, characterized in that, The inner wall of the filter cylinder (3) is rotatably connected to a plurality of circumferentially uniformly arranged guide vanes (22). The plurality of guide vanes (22) rotate synchronously and divide the space between the filter cylinder (3) and the filter element (7) into upper and lower regions.

7. The multi-stage reverse osmosis water purifier according to claim 6, characterized in that, The filter cartridge (3) has a rotating groove (23) inside its side wall solid. A toothed ring (24) is rotatably arranged inside the rotating groove (23). A bevel gear (25) is meshed with the lower side of the toothed ring (24) and is coaxially connected to the rotating shaft of the guide plate (22). A slider (26) is fixedly arranged on the upper side of the toothed ring (24). A sliding groove (27) matching the slider (26) is provided inside the side wall solid of the filter cartridge (3). An elastic element (28) is provided inside the sliding groove (27) to prevent the slider (26) from moving to one side.

8. The multi-stage reverse osmosis water purifier according to claim 7, characterized in that, The cylinder cover (18) and the knob (19) are connected by a coil spring (29). The cylinder cover (18) is provided with a limiting component for the rotation of the limiting knob (19). The action of the limiting component to cancel the limiting is linked to the movement of the slider (26).

9. The multi-stage reverse osmosis water purifier according to claim 8, characterized in that, The limiting component includes a limiting post (30) that is movably mounted on the cylinder cover (18), a retaining plate (31) fixedly mounted on the side wall of the knob (19), an active groove (32) matching the retaining plate (31) provided inside the cylinder cover (18), the limiting post (30) passing through the active groove (32) to be in the active stroke of the retaining plate (31), and a notch (33) matching the retaining plate (31) provided on the limiting post (30). When the slider (26) moves to press the elastic element (28) to a certain extent, the limiting post (30) rises in conjunction to make the notch (33) correspond to the height of the retaining plate (31).

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