Multistage reverse osmosis water purifier

Abstract

The invention discloses a multi-stage reverse osmosis water purifier which comprises a shell, and further comprises a mounting cavity arranged in the shell; the filter cartridge is arranged in the mounting cavity, a liquid outlet is formed in the center of the lower end of the filter cartridge, and a liquid inlet is formed in the eccentric position of the lower end; the perforated core tube is rotationally arranged in the filter cartridge, a filter element sleeves the outer side of the perforated core tube, and the lower end of the perforated core tube is communicated with the liquid outlet; the flow control assembly is arranged on the lower side of the interior of the filter cartridge, is communicated with the liquid inlet, and is driven by the rotation of the core tube with the hole to guide water flow to be switched between being guided in from the lower side of the filter cartridge and being guided in from the upper side of the filter cartridge. Under the driving of the driving assembly, the core pipe with the hole rotates to drive the flow control assembly to switch the water flow introduced from the liquid inlet to be introduced from the lower side of the filter cartridge to be introduced from the upper side of the filter cartridge, so that the problem that the lower half part of the filter element is quickly blocked due to flow guide at a single position is solved, and each height part of the filter element can be fully utilized; the service life of the filter element is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of water purifiers, and in particular to a multi-stage reverse osmosis water purifier. Background Art

[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 the action of pressure, water molecules and beneficial minerals flow out of the filter cartridge and undergo multi-stage filtration to become purified water, while harmful substances such as bacteria, colloids, rust, and suspended matter are trapped in the filter cartridge, thereby achieving the effect of filtration and purification. Existing water purifiers can basically meet daily usage needs, but there are still some shortcomings that need to be improved.

[0003] Patent document CN109110840A disclosed on January 1, 2019, a multi-stage water purifier that is easy to replace filter cartridges. The device includes a body and a filter cartridge. The base of the body is provided with a plug-in hole, a raw water inlet, and a purified water outlet. The filter cartridge is plugged into the plug-in hole. A water inlet column and a water outlet column are provided in the plug-in hole. The lower end of the filter cartridge is provided with a filter cartridge water inlet hole and a filter cartridge water outlet hole. The water inlet column and the filter cartridge water inlet hole, as well as the water outlet column and the filter cartridge water outlet hole are provided with water locking components. When the water inlet column and the water outlet column are respectively inserted into the filter cartridge water inlet hole and the filter cartridge water outlet hole, the two sets of water locking components are opened to achieve water channel penetration, thereby connecting the filter cartridges in series to the water channel. The present invention can prevent excess water from flowing out when the filter cartridge is replaced, and can also prevent the water inlet and water outlet of the filter cartridge from flowing in series during water purification, as well as water leakage at the filter cartridge joint.

[0004] In the prior art such as the above-mentioned patent, the positions of water flow inlet and outlet of the filter cartridge are close, and the position of water flow in the filter cartridge is fixed. Most of the water is filtered by the filter element near the inlet position and then introduced into the outlet direction, which causes a part of the filter element to be quickly consumed and blocked. The filter element as a whole cannot be fully used. Therefore, a multi-stage reverse osmosis water purifier is urgently needed to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a multi-stage reverse osmosis water purifier to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A multi-stage reverse osmosis water purifier includes a shell and also includes: a mounting cavity, which is arranged in the shell; a filter cartridge, which is arranged in the mounting cavity, and has a liquid outlet at the center of its lower end and a liquid inlet at an eccentric position of its lower end; a perforated core tube, which is rotatably arranged in the filter cartridge, has a filter core sleeved on its outer side, and has a lower end connected to the liquid outlet; a flow control component, which is arranged on the lower side of the filter cartridge and maintains connection with the liquid inlet, and is driven by the rotation of the perforated core tube to guide the water flow to switch between being introduced from the lower side of the filter cartridge or being introduced from the upper side of the filter cartridge; and a drive component, which is used to drive the perforated core tube to rotate.

[0008] Preferably, the flow control component includes a rotating part arranged on the lower side of the filter element and coaxially fixedly connected to the perforated core tube, a separating ring fixed to the inner wall of the filter cartridge is fitted on the upper side of the rotating part, a plurality of first through holes are arranged on the circumference of the separating ring, a second through hole matching the first through hole is arranged on the upper end of the rotating part, a flow guide component is arranged on the side wall of the filter cartridge, the two ends of the flow guide component 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 part, and a third through hole is arranged on the side wall of the rotating part, and under the rotation of the perforated core tube, the conduction between the first through hole and the second through hole and the conduction between the flow guide component and the third through hole are switched.

[0009] Preferably, the flow guide assembly includes a flow guide pipe arranged in the shell, the upper end of the flow guide pipe is connected to the upper part of the filter cartridge side wall through a first plug, and the lower end of the flow guide pipe is connected to the lower side of the filter cartridge side wall through a hose.

[0010] Preferably, the first plug nozzle is movably arranged to penetrate the side wall of the filter cartridge, and the end portion is detachably connected to the upper end of the guide tube.

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

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

[0013] Preferably, the inner wall of the filter cartridge is rotatably connected to a plurality of guide plates evenly arranged around the circumference, and the plurality of guide plates rotate synchronously and separate the space between the filter cartridge and the filter element into upper and lower areas.

[0014] Preferably, a rotation groove is opened in the side wall entity of the filter cartridge, a gear ring is rotatably arranged in the rotation groove, the lower side of the gear ring is meshed with a bevel gear coaxially connected to the rotating shaft of the guide plate, a slider is fixedly arranged on the upper side of the gear ring, a slide groove matching the slider is provided in the side wall entity of the filter cartridge, and an elastic part that hinders the movement of one side of the slider is provided in the slide groove.

[0015] Preferably, the cylinder cover and the knob are connected via a coil spring, a limiting assembly for limiting the rotation of the knob is provided in the cylinder cover, and the action of canceling the limiting by the limiting assembly is linked to the movement of the slider.

[0016] Preferably, the limit assembly includes a limit column that is movable and arranged on the cylinder cover, a card plate is fixedly provided on the side wall of the knob, a movable groove matching the card plate is provided in the cylinder cover, the limit column passes through the movable groove to be in the movable stroke of the card plate, and a notch matching the card plate is provided on the limit column. When the slider moves to compress the elastic part to a certain extent, the limit column rises in conjunction so that the notch corresponds to the height of the card plate.

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

[0018] The multi-stage reverse osmosis water purifier is provided with a rotatable core tube with a hole. When driven by a driving component, the core tube with a hole rotates to drive the flow control component to switch the water flow introduced into the liquid inlet from the lower side of the filter cartridge to the upper side of the filter cartridge, thereby solving the problem of rapid blockage of the lower half of the filter element due to flow diversion at a single position, and making full use of all height parts of the filter element, thereby extending the service life of the filter element.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0023] Figure 2 A schematic side cross-sectional view of an embodiment of the present invention;

[0024] Figure 3 The embodiment of the present invention provides Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 4 The embodiment of the present invention provides Figure 2 Schematic diagram of the enlarged structure at B in the middle;

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

[0027] Figure 6 The embodiment of the present invention provides Figure 5 Schematic diagram of the enlarged structure at C in the middle;

[0028] Figure 7 The embodiment of the present invention provides Figure 5 Schematic diagram of the enlarged structure at D in the middle;

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

[0030] Figure 9 A schematic diagram of a top cross-sectional structure of a position limiting assembly provided in an embodiment of the present invention;

[0031] Figure 10 A schematic diagram of a top cross-sectional structure of a chute provided in an embodiment of the present invention;

[0032] Figure 11 A schematic diagram of a top cross-sectional structure of a positioning groove provided by an embodiment of the present invention;

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

[0034] Description of reference numerals:

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

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0037] See also Figure 1-12 A multi-stage reverse osmosis water purifier provided by an embodiment of the present invention includes a shell 1, and also includes: an installation cavity 2, which is arranged in the shell 1; a filter cartridge 3, which is arranged in the installation cavity 2, and is provided with a liquid outlet 4 at the center of its lower end, and a liquid inlet 5 at the eccentric position of the lower end; a perforated core tube 6, which is rotatably arranged in the filter cartridge 3, and is provided with a filter element 7 on the outer side, and its lower end is connected with the liquid outlet 4; a flow control component, which is arranged on the lower side of the filter cartridge 3 and is kept in contact with 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 being introduced from the upper side of the filter cartridge 3; a driving component, which is used to drive the perforated core tube 6 to rotate.

[0038] Specifically, a water receiving area is provided on the front of the shell 1, an operation panel is provided above the water receiving area, and a kettle base is provided below the water receiving area. The kettle base can be used to place a hot water kettle for use after power is turned on; an installation cavity 2 is provided on the back of the shell 1, and multiple installation cavities 2 are provided laterally, corresponding to different filtering functions; the filter cartridge 3 is detachably installed in the installation cavity 2, specifically: a flange is provided on the upper end of the filter cartridge 3, and after the filter cartridge 3 is inserted into the installation cavity 2 from top to bottom, the flange limits the height of the filter cartridge 3; the liquid outlet 4 corresponds to the perforated core tube 6, that is, the perforated core tube 6 is at the axial center position in the filter cartridge 3; the liquid inlet 5 is at an eccentric position, which directly guides the water flow to the space between the filter cartridge 3 and the filter element 7; the perforated core tube 6 is arranged in the direction of its extension A plurality of small holes are evenly arranged for guiding the filtered water flow and then directing it to the liquid outlet 4; the perforated core tube 6 is rotatably sleeved on the liquid outlet 4 and extends to the upper end of the filter cartridge 3 and is sealed; the filter element 7 is cylindrical, hollow in the middle and matches the perforated core tube 6, and the outer diameter is smaller than the inner diameter of the filter cartridge 3 to form a gap, and the water flow mainly flows through the outer wall of the filter element 7 to the hollow in the middle 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 liquid inlet 5 and then selectively guides it to the lower side or upper side of the filter cartridge 3, thereby realizing the switching of the water flow introduction position; the driving 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 actual use of this technical solution, when it is first used, the flow control component keeps controlling the water flow connected to the liquid inlet 5 to be introduced into the lower side of the filter cartridge 3, and the filter element 7 is used normally. After that, when the filter element 7 is used for a period of time, the lower half of the filter element 7 is consumed to a certain extent. When blockage occurs, the driving component drives the core tube 6 with holes to rotate, so as to drive the flow control component to switch the water flow introduced into the liquid inlet 5 from being introduced into the lower side of the filter cartridge 3 to being introduced into the upper side of the filter cartridge 3, thereby solving the problem of rapid blockage of the lower half of the filter element 7 caused by the diversion at a single position, and making full use of the various height parts of the filter element 7 to extend the service life of the filter element 7.

[0039] Compared with the prior art, a multi-stage reverse osmosis water purifier proposed in an embodiment of the present invention is provided with a rotatable perforated core tube 6. Under the drive of the driving component, the perforated core tube 6 rotates to drive the flow control component to switch the water flow introduced into the liquid inlet 5 from the lower side of the filter cartridge 3 to the upper side of the filter cartridge 3, thereby solving the problem of rapid blockage of the lower half of the filter element 7 caused by the diversion at a single position, and making full use of the various height parts of the filter element 7, extending the service life of the filter element 7, and improving the practicality of the device.

[0040] As the preferred technical solution of this embodiment, the flow control component includes a rotating member 8 arranged on the lower side of the filter element 7 and coaxially fixedly connected to the perforated core tube 6, a separating ring 9 fixed to the inner wall of the filter cartridge 3 is fitted on the upper side of the rotating member 8, a plurality of first through holes 10 are arranged on the circumference of the separating ring 9, a second through hole 11 matching the first through hole 10 is arranged on the upper end of the rotating member 8, a flow guide component is provided on the side wall of the filter cartridge 3, and the two ends of the flow guide component 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 member 8. The side wall of the rotating member 8 is provided with a third through hole 12. Under the rotation of the perforated core tube 6, the conduction between the first through hole 10 and the second through hole 11 and the conduction between the guide component and the third through hole 12 are switched. Specifically, the rotating member 8 is in the shape of a round cover, with an open lower end and an outer diameter matching the inner diameter of the filter cartridge 3. The lower end of the perforated core tube 6 is located at the lower side of the rotating member 8 and is rotatably connected to the liquid outlet 4; the upper end of the liquid inlet 5 extends to the interior of the filter cartridge 3 and is located at the lower side of the rotating member 8; the separating ring 9 is attached to the upper side of the rotating member 8 to When the rotating member 8 rotates to make the first through hole 10 and the second through hole 11 completely misaligned, the space between the lower side of the rotating member 8 and the upper side of the separating ring 9 is cut off; the inner diameter of the separating ring 9 matches the outer diameter of the filter element 7; the first through holes 10 are evenly arranged on the separating ring 9, and a certain arc interval is left between the two adjacent first through holes 10, and the second through holes 11 are matched one by one with the first through holes 10. The above interval setting helps to achieve the complete misalignment of the first through hole 10 and the second through hole 11; the guide component is used to The side space spans the lower part of the filter cartridge 3 and is directly connected to the upper part of the filter cartridge 3; the third through hole 12 rotates with the rotating part 8 to form an overlap or a certain angle of dislocation on the rotating surface to control the on and off of the guide component, and is staggered with the on and off of the first through hole 10 and the second through hole 11, that is, when the first through hole 10 is fully connected with the second through hole 11, the third through hole 12 is not connected with the guide component, and when the third through hole 12 is fully connected with the guide component, the first through hole 10 is not connected with the second through hole 11.

[0041] As a preferred technical solution of this embodiment, the flow guide assembly includes a flow guide pipe 13 arranged in the housing 1, the upper end of the flow guide pipe 13 is connected to the upper part of the side wall of the filter cartridge 3 through the first plug 14, and the lower end of the flow guide pipe 13 is connected to the lower side of the side wall of the filter cartridge 3 through the hose 15. Specifically, the main body of the flow guide pipe 13 is axially arranged parallel to the installation cavity 2, and the upper end of the flow guide pipe 13 is bent to point to the radial arrangement of the installation cavity 2; the first plug 14 is inserted from the inside of the filter cartridge 3 and extends out of the filter cartridge 3. When the filter cartridge 3 is installed in the installation cavity 2, the first plug 14 is inserted from the inside of the filter cartridge 3 and extends out of the filter cartridge 3. The plug 14 should correspond to the upper end of the guide tube 13, and then the first plug 14 is connected to the upper end of the guide tube 13, and the filter cartridge 3 can be limited and fixed in the installation cavity 2; an equipment area is provided in the shell 1 corresponding to the lower end of the installation cavity 2, which is used to install devices such as a water pump, a wastewater combination valve, a 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 corresponding to the third through hole 12.

[0042] As a further preferred technical solution of this embodiment, the first plug 14 is movably arranged to penetrate the side wall of the filter cartridge 3, and the end thereof is detachably connected to the upper end of the guide tube 13. Specifically, the end of the first plug 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 removed or installed in the installation cavity 2, the filter element 7 is removed first, and then the first plug 14 can be operated to rotate from the filter cartridge 3 to connect or remove it with the guide tube 13.

[0043] As a further preferred technical solution of this embodiment, a fourth through hole 16 is provided on the lower side of the side wall of the filter cartridge 3, matching the third through hole 12. A second plug 17 is provided at the end of the hose 15 away from the flow guide tube 13, which is detachably connected to the fourth through hole 16. Specifically, the second plug 17 and the fourth through hole 16 can also be threaded, in which case the second plug 17 is rotatably connected to one end of the hose 15, or the second plug 17 and the fourth through hole 16 are plugged in with an interference fit, in which case the second plug 17 has a certain degree of elasticity. The above arrangement of the flow guide assembly satisfies the flow diversion requirements and does not hinder the removal and installation of the filter cartridge 3 within the installation cavity 2.

[0044] In another embodiment of the present invention, a cartridge cover 18 is provided at the upper end of the filter cartridge 3, and a driving assembly includes a knob 19 rotatably arranged on the cartridge cover 18, a pressure plate 20 is elastically movably provided on the lower side of the knob 19, and a synchronously rotating rotary block 21 is coaxially plugged into the upper end of the perforated core tube 6, and the pressure plate 20 is in damping contact with the rotary block 21. Specifically, the cartridge cover 18 is threadedly connected to the filter cartridge 3; the cartridge cover 18 is connected to the upper end portion of the filter cartridge 3 extending out of the mounting cavity 2; the knob 19 is coaxially rotatably connected to the center of the cartridge cover 18; a retraction cavity is provided at 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 a polygonal column, which satisfies the telescopic movement of the pressure plate 20 and enables 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 is connected between the inner walls of the retraction chamber, thereby keeping the pressure plate 20 automatically extending out of the retraction chamber; when the cylinder cover 18 is tightened on the filter cartridge 3, the telescopic rod 34 contracts a certain length, and the pressure plate 20 maintains the elastic force to counteract the rotary block 21, and the pressure plate 20 is in damping contact with the rotary block 21, that is, when the pressure plate 20 rotates with the knob 19, the pressure plate 20 drives the rotary block 21 to rotate through friction damping, and then drives the perforated core tube 6 to rotate; the rotary block 21 includes a circular plate portion in contact with the pressure plate 20 and a plug-in portion for plugging into the perforated core tube 6. The plug-in portion is preferably in the shape of a polygonal column, and a socket matching the plug-in portion is provided at the upper end of the perforated core tube 6, thereby meeting the needs of torque transmission and disassembly. The detachable rotary 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 member 8 in the filter cartridge 3 is limited. Specifically, a positioning block 35 is provided on the outer wall of the rotating member 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 cartridge 3. The positioning block 35 only slides in the positioning groove 36 to limit the rotation range of the rotating member 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 proposed by the present invention, the inner wall of the filter cartridge 3 is rotatably connected to a plurality of guide plates 22 evenly arranged around the circumference, and the plurality of guide plates 22 rotate synchronously and divide the space between the filter cartridge 3 and the filter element 7 into an upper and lower area. Specifically, the plurality of guide plates 22 divide the space between the filter cartridge 3 and the filter element 7 into an upper and lower area. When the water flow introduced by the liquid inlet 5 enters the filter cartridge 3 from the lower side, part of the water flow flows upward through the guide plates 22, which can push the guide plates 22 to rotate upward; when the water flow introduced by the liquid inlet 5 enters the filter cartridge 3 from the upper side, the water flow flows downward through the guide plates 22, which pushes the guide plates 22 to rotate downward; the provision of the guide plates 22 ensures that the water flow flows more concentratedly in the designated area, further satisfying the function of fully utilizing the filter element 7.

[0046] As the preferred technical solution of this embodiment, a rotating groove 23 is provided in the side wall entity of the filter cartridge 3, and a gear ring 24 is rotatably provided in the rotating groove 23. The lower side of the gear ring 24 is meshed with a bevel gear 25 coaxially connected to the rotating shaft of the guide vane 22, and a slider 26 is fixedly provided on the upper side of the gear ring 24. A slide groove 27 matching the slider 26 is provided in the side wall entity of the filter cartridge 3, and an elastic member 28 that hinders the movement of one side of the slider 26 is provided in the slide groove 27. Specifically, the rotating groove 23 is sleeved on the outside of the internal space of the filter cartridge 3; the gear ring 24 is meshed with each bevel gear 25 to realize the synchronous rotation of each guide vane 22; the elastic member 28 can preferably be a spring, and the elastic member 28 The movement direction of the obstruction slider 26 corresponds to: when the guide plate 22 rotates upward, the movement direction of the slider 26 is transmitted, and the movement direction of the other side of the slider 26 is not affected. The range of movement of the slider 26 in the slide groove 27 limits the range of upward or downward rotation of the guide plate 22 to no more than 90°; the elastic member 28 has an obstructing effect on the slider 26, that is, it obstructs the guide plate 22 from rotating upward, thereby causing, when the water flow introduced by the liquid inlet 5 enters the filter cartridge 3 from the lower side, after a period of time, the lower half of the filter element 7 is consumed to a certain extent, and blockage occurs, then the water flow passing through the guide plate 22 upward increases, and only then can the guide plate 22 obstructed by the elastic force be pushed.

[0047] As a preferred technical solution of this embodiment, the cylinder cover 18 and the knob 19 are connected by a coil spring 29. A limit assembly for limiting the rotation of the limit knob 19 is provided in the cylinder cover 18. The limit assembly cancels the limit action and is linked to the activity of the slider 26. Specifically, the cooperation between the coil spring 29 and the limit assembly enables the knob 19 to store the potential energy of the rotation trend. Before the cylinder cover 18 is installed, the knob 19 stores the rotation potential energy and is limited by the limit assembly. During the installation process of the cylinder cover 18, the knob 19 is fixed relative to the cylinder cover 18, and the cylinder cover 18 rotates clockwise. Dynamic installation, as the cylinder cover 18 is tightened, the pressure plate 20 contacts the rotary block 21 and generates friction damping. At this time, the pressure plate 20 prompts the rotary block 21 to rotate in the direction that just drives the perforated core tube 6 and the rotating member 8 to rotate, so that the first through hole 10 and the second through hole 11 gradually correspond or remain corresponding, and the third through hole 12 and the fourth through hole 16 gradually stagger or remain staggered, until the cylinder cover 18 is tightened. Under the damping between the pressure plate 20 and the rotary block 21, the first through hole 10 and the second through hole 11 are completely corresponding, and the third through hole 12 and the fourth through hole 16 are completely corresponding. 6 is completely staggered; at this time, the rotational potential energy stored in the knob 19 is just opposite to the rotation direction of the cylinder cover 18 when it is installed, and then when the slider 26 moves to trigger the limit assembly to cancel the limit, the rotation of the knob 19 relative to the cylinder cover 18 can drive the rotating member 8 to rotate through the pressure plate 20, the rotary block 21, and the perforated core tube 6, so that the first through hole 10 and the second through hole 11 are completely staggered, and the third through hole 12 is completely corresponding to the fourth through hole 16; the activity direction of the slider 26 triggering the limit assembly to cancel the limit corresponds to the slider 26 compressing the elastic member 2 8, that is, the guide plate 22 rotates upward to a certain extent. That is to say, the water flow introduced at the liquid inlet 5 enters from the lower side of the filter cartridge 3 and after a period of use, the lower half of the filter element 7 is consumed to a certain extent, causing blockage. The water flow passing through the guide plate 22 upward increases to a certain extent to satisfy the guide plate 22 pushing upward to a certain angle, thereby triggering the movement of the slider 26, and then triggering the limit component to cancel the limit function, thereby realizing automatic control of the switching of the water flow introduction position according to the blockage of the lower part of the filter element 7.

[0048] As the preferred technical solution of this embodiment, the limit assembly includes a limit column 30 that is movably arranged on the cylinder cover 18, a card plate 31 is fixedly provided on the side wall of the knob 19, and a movable groove 32 that matches the card plate 31 is provided in the cylinder cover 18. The limit column 30 passes through the movable groove 32 to be in the movable stroke of the card plate 31, and a notch 33 that matches the card plate 31 is provided on the limit column 30. When the slider 26 moves to compress the elastic member 28 to a certain extent, the limit column 30 rises in conjunction with the notch 33 to correspond to the height of the card plate 31. Specifically, the upper and lower ends of the limit column 30 are provided with a column that movably passes through the cylinder cover 18, and the limit column 30 does not rotate; the card plate 31 is movable The movable range within the groove 32 corresponds to the rotation range of the rotating member 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 card plate 31 abuts against the limiting post 30 to be limited, and at this time, the knob 19 stores rotational potential energy; and 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, and the knob 19 drives the card plate 31 to rotate, and the edge of the card plate 31 can move smoothly through the notch 33. In addition, the card plate 31 is embedded in the notch 33, which actually limits the height of the limiting post 30. The upper end column of the limiting post 30 remains extended out of the barrel cover 18 to serve as a reminder, and the user can use this to judge that the life of the filter element 7 is less than half. Furthermore, a concave annular groove 37 is physically provided at the upper end of the filter cartridge 3. When the cartridge cover 18 is tightened and the limiting post 30 is kept at the lowest height to limit the card plate 31, the lower end of the limiting post 30 extends into the concave annular groove 37; a ring body 38 is provided in the concave annular groove 37 for lifting and lowering, and the ring body 38 corresponds to the lower end of the limiting post 30. A push rod 39 is fixedly provided at the lower end of the ring body 38, and a slope block 40 is provided at the upper end of the slider 26. The lower end of the push rod 39 is movably extended into the rotating groove 23 and wedge-fits with the slope block 40; in actual use, the guide plate 22 is pushed by the upward flowing water flow to rotate upward, and then the slider 26 is linked to squeeze the elastic member 28 to move. When the slider 26 moves in this direction After moving to a certain distance, that is, through the wedge-shaped extrusion of the slope block 40 and the lower end of the push rod 39, the push rod 39 drives the ring body 38 to rise, and the ring body 38 pushes the limit column 30 to rise, so that the height of the notch 33 corresponds to the movable groove 32, thereby canceling the limit of the card plate 31, and the rotational potential energy of the knob 19 is released. The water flow guide of the liquid inlet 5 is switched 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 of the lower end of the filter element 7 is reduced; in addition, the water flow in this direction mainly flows downward, and the obstruction of the guide plate 22 to the downward flowing water flow is not affected by the elastic member 28, so that the lower part of the filter element 7 can also be fully utilized.

[0049] In addition, forming a rotating groove 23 and a sliding groove 27 in the wall of the filter cartridge 3 and using them to assemble linkage components such as the gear ring 24, the bevel gear 25, and the slider 26 is not a conventional setting. In order to facilitate assembly, the filter cartridge 3 preferably adopts a segmented structure, that is, it includes an upper tube 301 and a lower tube 302, wherein the outer wall of the lower tube 302 is processed to form groove-type and hole-type structures such as the rotating groove 23 and the sliding groove 27. After the components are assembled on the outer wall of the lower tube 302, the upper tube 301 is threadedly installed on the lower tube 302, thereby facilitating assembly. Furthermore, a hole is opened on the inner wall of the lower tube 302 and sealed after the parts are assembled, and the joint between the upper tube 301 and the lower tube 302 is also threaded and sealed.

[0050] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A multi-stage reverse osmosis water purifier, comprising a housing (1), characterized in that: Also includes: A mounting cavity (2) disposed within the housing (1); A filter cartridge (3) is disposed in the mounting cavity (2), and has a liquid outlet (4) at the center of its lower end and a liquid inlet (5) at an eccentric position of its lower end; A core tube with a hole (6) is rotatably arranged in the filter cartridge (3), a filter core (7) is sleeved on the outer side thereof, and a lower end thereof is communicated with the liquid outlet (4); A flow control component is arranged on the lower side of the filter cartridge (3) and is connected to the liquid inlet (5). The flow control component 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 being introduced from the upper side of the filter cartridge (3); A driving assembly is used to drive the perforated core tube (6) to rotate.

2. The multi-stage reverse osmosis water purifier according to claim 1, characterized in that: The flow control component includes a rotating member (8) arranged on the lower side of the filter element (7) and coaxially fixedly connected to the perforated core tube (6), a separating ring (9) fixed to the inner wall of the filter cartridge (3) is provided on the upper side of the rotating member (8), a plurality of first through holes (10) are provided on the circumference of the separating ring (9), a second through hole (11) matching the first through hole (10) is provided on the upper end of the rotating member (8), a flow guide component is provided on the side wall of the filter cartridge (3), two ends of the flow guide component 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 side wall of the rotating member (8), and a third through hole (12) is provided on the side wall of the rotating member (8). Under the rotation of the perforated core tube (6), the conduction between the first through hole (10) and the second through hole (11) and the conduction between the flow guide component and the third through hole (12) are switched.

3. The multi-stage reverse osmosis water purifier according to claim 2, characterized in that: The flow guide assembly comprises a flow guide tube (13) disposed in the housing (1); the upper end of the flow guide tube (13) is connected to the upper portion of the side wall of the filter cartridge (3) via a first plug nozzle (14), while the lower end of the flow guide tube (13) is connected to the lower side wall of the filter cartridge (3) via a hose (15).

4. The multi-stage reverse osmosis water purifier according to claim 3, characterized in that: The first plug nozzle (14) is movably arranged to penetrate the side wall of the filter cartridge (3), and the end portion is detachably connected to the upper end of the guide tube (13).

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

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

7. The multi-stage reverse osmosis water purifier according to claim 6, characterized in that: The inner wall of the filter cartridge (3) is rotatably connected to a plurality of guide plates (22) evenly arranged around the circumference, and the plurality of guide plates (22) rotate synchronously and separate the space between the filter cartridge (3) and the filter element (7) into upper and lower areas.

8. The multi-stage reverse osmosis water purifier according to claim 7, characterized in that: A rotation groove (23) is provided in the side wall entity of the filter cartridge (3), a gear ring (24) is rotatably provided in the rotation groove (23), a bevel gear (25) is meshedly connected to the lower side of the gear ring (24) and is coaxially connected to the rotating shaft of the guide vane (22), a slider (26) is fixedly provided on the upper side of the gear ring (24), a slide groove (27) matching the slider (26) is provided in the side wall entity of the filter cartridge (3), and an elastic member (28) is provided in the slide groove (27) to prevent the slider (26) from moving on one side.

9. The multi-stage reverse osmosis water purifier according to claim 8, characterized in that: The cylinder cover (18) and the knob (19) are connected via a coil spring (29). A limit assembly for rotating the limit knob (19) is provided in the cylinder cover (18). The action of canceling the limit by the limit assembly is linked to the movement of the slider (26).

10. The multi-stage reverse osmosis water purifier according to claim 9, characterized in that: The limiting assembly includes a limiting column (30) that is movable and arranged on the cylinder cover (18), a clamping plate (31) is fixedly arranged on the side wall of the knob (19), a movable groove (32) that matches the clamping plate (31) is arranged in the cylinder cover (18), the limiting column (30) passes through the movable groove (32) to be in the movable stroke of the clamping plate (31), and a notch (33) that matches the clamping plate (31) is arranged on the limiting column (30). When the slider (26) moves to press the elastic member (28) to a certain extent, the limiting column (30) rises in a linked manner so that the notch (33) corresponds to the height of the clamping plate (31).

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