Multi-stage intelligent water purifier

Abstract

The application discloses a multi-stage intelligent water purifying processor, which comprises a shell, a water inlet pipe communicated with the shell, and a filter assembly arranged in the shell, wherein the filter assembly comprises a pipeline communicated with the water inlet pipe. In the application, a backwashing assembly is arranged, a booster pipe is matched with a piston, a shaft rod and a rotating arm, in the daily water use process of a user, the driving rod is driven to rotate by the impact force generated by the water hammer effect with the opening and closing of a hand tap, the driving rod is rebounded by the ratchet and the ratchet teeth after rotation, energy is stored by a torsional spring, when the user uses a second water outlet pipe to drain water, additional water pressure is provided by the torsional spring, and then the first filter core, the second filter core and the third filter core are subjected to more effective backwashing operation, the kinetic energy of water is fully utilized, and the backwashing of the filter assembly is automatically completed with low power consumption.

Description

Technical Field

[0001] This invention relates to the field of hardware processing equipment technology, and in particular to a multi-stage intelligent water purifier. Background Technology

[0002] A water purifier, also known as a water purifier or water quality purifier, is a water treatment device that performs deep filtration and purification of water according to the requirements of water use. The function of a water purifier is to remove floating matter, heavy metals, bacteria, viruses, residual chlorine, sediment, rust, microorganisms, etc. from the water. It has high-precision filtration technology. In the home field, it generally adopts multi-stage filtration, and its last stage is a reverse osmosis membrane or ultrafiltration membrane, so that the treated water can meet the standards for direct drinking water.

[0003] Water purifiers have become widespread in the home market. However, in practical applications, existing water purifiers often require long filter replacement cycles for home users. They only replace the filters when the reverse osmosis or ultrafiltration membranes are severely clogged, significantly affecting the water output. This not only affects the quality of the water but also increases the filtration load on the reverse osmosis or ultrafiltration membranes, reducing their lifespan. To address these issues, we propose a multi-stage intelligent water purifier. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a multi-level intelligent water purifier.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-stage intelligent water purifier includes a housing, an inlet pipe connected to the housing, and a filter assembly disposed within the housing, wherein:

[0007] The filtration assembly includes a pipe connected to the inlet pipe. The housing is provided with a first-stage filter element, a second-stage filter element, a third-stage filter element, a fourth-stage filter element and a post-activated carbon connected in sequence through the pipe. The housing is also provided with a backwashing assembly. A first outlet pipe is connected to one side of the housing. The second-stage filter element and the third-stage filter element are also provided with a sewage discharge assembly. The first outlet pipe is connected to a pipe near the post-activated carbon.

[0008] The backwash assembly includes a booster pipe connected to a pipeline. A piston is slidably connected inside the booster pipe, and a crossbar is fixedly connected to the upper end of the piston. A shaft is rotatably connected to the end of the booster pipe away from the pipeline, and a rotating arm is fixedly connected to the side wall of the shaft. A slotted groove is formed on the side wall of the rotating arm, and the slotted groove of the crossbar is slidably connected. A drive rod is rotatably connected to one end of the shaft via a one-way bearing, and a torsion spring is sleeved on the side wall of the drive rod. A water storage tank is fixedly connected inside the housing, and the drive rod passes through the water storage tank. The side wall of the drive rod located inside the water storage tank is fixedly connected to... The water storage tank is equipped with blades and is connected to a pipeline via a backflush pipe. A solenoid valve is installed on the backflush pipe. A torsion spring is fixedly connected to the side wall of the water storage tank. A ratchet is also fitted on the side wall of the drive rod. A ratchet tooth matching the ratchet is rotatably connected to the side wall of the water storage tank. An electromagnet is also fixedly connected to the side wall of the water storage tank near the ratchet tooth. A diverter pipe is connected to the water inlet pipe, and the diverter pipe is connected to the water storage tank via a one-way valve. A two-position three-way solenoid valve is connected to one end of the pipeline near the inlet pipe, and the two-position three-way solenoid valve is also connected to a second outlet pipe.

[0009] Preferably, a mounting frame is fixedly connected inside the housing, a drive motor is fixedly connected to the mounting frame, and a connecting rod is rotatably connected to the output end of the drive motor. Two placement racks are fixedly connected to the connecting rod. The fourth-stage filter element and the post-activated carbon are located on the placement racks, and an adapter pipe is provided on the placement rack. The adapter pipe is connected to the fourth-stage filter element and the post-activated carbon, and pressure sensors are provided at both ends of the adapter pipe. The pressure sensors are electrically connected to an electronic control module via wires, and the electronic control module is electrically connected to the drive motor. Extension tubes are slidably sleeved at both ends of the adapter pipe, and the extension tubes are fixedly connected to the outer wall of the adapter pipe via a first compression spring. An adapter is fixedly connected to the pipe near the extension tube. A rope shaft is fixedly connected to the output end of the drive motor, and a pull rope is wound on the rope shaft. The end of the pull rope away from the rope shaft is fixedly connected to the extension tube. An auxiliary wheel is rotatably connected to the placement rack, and the pull rope abuts against the auxiliary wheel.

[0010] Preferably, the sewage discharge assembly includes a circular pipe that is slidably connected to the inner wall of the pipe, and a return spring is provided at one end of the circular pipe. The return spring is fixedly connected to the inner wall of the pipe. A one-way valve is provided at one end of the circular pipe. A sewage discharge port is opened on one side of the circular pipe. A sewage discharge pipe is connected to the side wall of the pipe near the sewage discharge port, and the sewage discharge pipe is connected to the second water outlet pipe.

[0011] Preferably, the booster pipe is located between the first outlet pipe and the post-activated carbon, and the backwash pipe is located between the third-stage filter element and the fourth-stage filter element.

[0012] Preferably, the water storage shell is disc-shaped, and a buffer cavity is provided on one side of the water storage shell. A sealing plug is slidably connected in the buffer cavity, and the blades are interference-fitted with the inner wall of the water storage shell.

[0013] Preferably, a transition shell is provided at the connection between the backflushing pipe and the pipeline, the transition shell has a stepped surface inside, and a baffle is rotatably connected to the side wall of the transition shell near the stepped surface via a spring shaft.

[0014] Preferably, the electronic control module includes a signal processor, a battery unit, and a motor controller.

[0015] Preferably, the adapter includes a circular tube, a limit ring is fixedly connected inside the circular tube, and a plug is slidably connected inside the circular tube. A second compression spring is also fixedly connected inside the circular tube, and the second compression spring is disposed against the plug.

[0016] Preferably, the first-stage filter element, the second-stage filter element, and the third-stage filter element are respectively a PP cotton filter element, a granular activated carbon filter element, and a precision compressed activated carbon filter element.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This invention, by setting up a backwashing assembly, utilizes a pressure booster pipe in conjunction with a piston, shaft, and rotating arm. During the user's daily water usage, the impact force generated by the water hammer effect drives the drive rod to rotate as the faucet is opened and closed. After the drive rod rotates, the ratchet and ratchet teeth cause the drive rod to rebound, thereby storing energy in a torsion spring. When the user drains water using the second outlet pipe, the torsion spring provides additional water pressure, which then performs a more effective backwashing operation on the first, second, and third stage filter elements. This not only fully utilizes the kinetic energy of water but also completes the backwashing of the filter components automatically with low power consumption, extending the maintenance cycle of the water purifier. It eliminates the need for manual operation by the user, prevents impurities filtered by the filter components from remaining in the filter components for a long time, and also improves the service life of the fourth stage filter element and the post-activated carbon filter.

[0019] 2. In this invention, a booster pipe is installed between the first water outlet pipe and the post-activated carbon filter. While storing energy for the backwashing components, it can also mitigate the impact of water hammer caused by the user's daily use of the faucet. This can improve the service life of the post-activated carbon filter and the fourth-stage filter element, while reducing the load on the water supply pipe and improving the service life of the filter components. The backwashing pipe installed between the third-stage filter element and the fourth-stage filter element avoids the fourth-stage filter element with higher filtration efficiency, preventing damage to the fourth-stage filter element due to high backwashing water pressure. At the same time, it ensures that there is sufficient water pressure to backwash the first-stage, second-stage, and third-stage filter elements.

[0020] 3. This invention, through the mounting bracket set inside the housing and in conjunction with the drive motor, when the pressure sensors at both ends of the adapter tube detect a large pressure difference, uses the electronic control module to control the drive motor. At this time, the drive motor rotates, and then the rope shaft drives the pull rope. Subsequently, the pull rope pulls the extension tube to disengage from the adapter. Then, the drive motor drives the connecting rod to rotate, causing the two mounting brackets to interchange positions. Finally, the drive motor releases, and the first compression spring drives the extension tube to connect with the adapter, automatically completing the replacement of the fourth-stage filter and the post-activated carbon. It has a high degree of automation, which is not only convenient for users, but also suitable for families with elderly people or children who do not know how to change filter cartridges. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a multi-level intelligent water purifier proposed in this invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of a multi-level intelligent water purifier proposed in this invention;

[0023] Figure 3 This is a partial structural schematic diagram of a multi-level intelligent water purifier proposed in this invention;

[0024] Figure 4 This is a schematic diagram of the backwashing component structure of a multi-stage intelligent water purifier proposed in this invention.

[0025] Figure 5 This is a schematic diagram of the water storage shell structure of a multi-level intelligent water purifier proposed in this invention;

[0026] Figure 6 This is a schematic diagram of the booster pipe structure of a multi-stage intelligent water purifier proposed in this invention;

[0027] Figure 7 This is a schematic diagram of the placement rack structure for a multi-level intelligent water purifier proposed in this invention;

[0028] Figure 8 This is a schematic diagram of the sewage discharge component structure of a multi-level intelligent water purifier proposed in this invention;

[0029] Figure 9 This is a schematic diagram of the adapter shell structure of a multi-level intelligent water purifier proposed in this invention;

[0030] Figure 10 This is a schematic diagram of the adapter structure of a multi-stage intelligent water purifier proposed in this invention.

[0031] In the diagram: 1. Shell; 2. Inlet pipe; 3. Pipe; 4. First-stage filter element; 5. Second-stage filter element; 6. Third-stage filter element; 7. Fourth-stage filter element; 8. Post-activated carbon; 9. First outlet pipe; 10. Booster pipe; 11. Piston; 12. Crossbar; 13. Shaft; 14. Rotary arm; 15. Drive rod; 16. Torsion spring; 17. Water tank; 18. Blade; 19. Ratchet; 20. Electromagnet; 21. Diverter pipe; 22. 23. Second outlet pipe; 24. Mounting bracket; 25. Drive motor; 26. Connecting rod; 27. Placement bracket; 28. Adapter pipe; 29. ​​Extension pipe; 30. Rope shaft; 31. First compression spring; 32. Auxiliary wheel; 33. Buffer chamber; 34. Sealing plug; 35. Adapter shell; 36. Baffle; 37. Round pipe; 38. Limiting ring; 39. Second compression spring; 40. Plug; 41. Round pipe; 42. Return spring; 43. Sewage pipe. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Reference Figure 1-10 A multi-stage intelligent water purifier includes a housing 1, with a water inlet pipe 2 connected to the housing 1, and a filter assembly disposed inside the housing 1, wherein:

[0034] The filtration assembly includes a pipe 3 connected to the inlet pipe 2. The housing 1 contains a first-stage filter element 4, a second-stage filter element 5, a third-stage filter element 6, a fourth-stage filter element 7, and a post-activated carbon filter 8, all connected sequentially via the pipe 3. The first-stage filter element 4, second-stage filter element 5, and third-stage filter element 6 are respectively a PP cotton filter element, a granular activated carbon filter element, and a precision compressed activated carbon filter element, while the fourth-stage filter element 7 is a reverse osmosis membrane or an ultrafiltration membrane. This type of filtration assembly is commonly used in existing technologies. The tap water passing through the reverse osmosis membrane or ultrafiltration membrane... It can meet the standards for direct drinking water. The post-activated carbon 8 is set to remove the odor in the water. The shell 1 is equipped with a backwashing component. One side of the shell 1 is connected to the first water outlet pipe 9. The second-stage filter element 5 and the third-stage filter element 6 are also equipped with a sewage discharge component. The first water outlet pipe 9 is connected to the pipe 3 near the post-activated carbon 8. The first water outlet pipe 9 is the main water outlet. The water flowing out of the first water outlet pipe 9 meets the standards for direct drinking water and can also be used for cooking and other purposes. It has a high degree of filtration and filters out bacteria in the water.

[0035] The backwash assembly includes a booster pipe 10 connected to pipe 3. A piston 11 is slidably connected inside the booster pipe 10, and a crossbar 12 is fixedly connected to the upper end of the piston 11. A shaft 13 is rotatably connected to the end of the booster pipe 10 away from pipe 3, and a rotating arm 14 is fixedly connected to the side wall of the shaft 13. A slotted groove is formed on the side wall of the rotating arm 14, and the slotted groove of the crossbar 12 is slidably connected. A drive rod 15 is rotatably connected to one end of the shaft 13 through a one-way bearing, and a torsion spring 16 is sleeved on the side wall of the drive rod 15. In this design, piston 11 is driven by water flow. During daily water use, the faucet is frequently turned on and off. When the faucet is turned off, a water hammer effect is generated in pipe 3, creating a certain impact force. This causes piston 11 to move upwards, which in turn drives shaft 13 to rotate. Drive rod 15 rotates under the drive of shaft 13 and, in conjunction with torsion spring 16, stores force. When the user turns on the faucet, a negative water hammer occurs, causing piston 11 to return to its original position, thus achieving the reciprocating motion of piston 11. The housing 1... A water storage tank 17 is fixedly connected inside the tank, and a drive rod 15 passes through the tank. A blade 18 is fixedly connected to the side wall of the drive rod 15 inside the tank. The tank is also connected to a pipe 3 via a backflush pipe, on which a solenoid valve is installed. A torsion spring 16 is fixedly connected to the side wall of the tank. A ratchet 19 is also fitted onto the side wall of the drive rod 15. A ratchet tooth matching the ratchet 19 is rotatably connected to the side wall of the tank. The side wall of the tank near the ratchet tooth is also fixedly connected to... There is an electromagnet 20. The water inlet pipe 2 is connected to a diversion pipe 21, and the diversion pipe 21 is connected to the water storage tank 17 through a one-way valve. The end of the pipe 3 near the water inlet pipe 2 is connected to a two-position three-way solenoid valve, and the two-position three-way solenoid valve is also connected to a second water outlet pipe 22. The second water outlet pipe 22 is mainly used to discharge water containing impurities and bacteria filtered by the filter components. It can be used for cleaning water or bathroom water. Since its water source is tap water, it is relatively clean and hygienic and has a high backwashing frequency, so it will not be too dirty and affect the user's use.

[0036] Furthermore, a mounting bracket 23 is fixedly connected inside the housing 1. A drive motor 24 is fixedly connected to the mounting bracket 23, and a connecting rod 25 is rotatably connected to the output end of the drive motor 24. Two placement brackets 26 are fixedly connected to the connecting rod 25. The fourth-stage filter element 7 and the post-activated carbon 8 are located on the placement brackets 26, and a transfer pipe 27 is provided on the placement brackets 26. The transfer pipe 27 is connected to the fourth-stage filter element 7 and the post-activated carbon 8, and pressure sensors are provided at both ends of the transfer pipe 27. The pressure sensors are electrically connected to an electronic control module via wires. The electronic control module includes a signal processor, a battery unit, and a motor controller. The motor controller is electrically connected to the drive motor 24. The signal processor is also electrically connected to a two-position three-way solenoid valve, an electromagnet 20, and the solenoid valve via wires to realize automatic control of all electronic control components and ultimately achieve the purpose of automated backwashing. Extensions are slidably sleeved at both ends of the transfer pipe 27. The pipe 28 is fixedly connected to the outer wall of the adapter pipe 27 via a first compression spring 30. An adapter is fixedly connected to the pipe 3 near the extension pipe 28. A rope shaft 29 is fixedly connected to the output end of the drive motor 24, and a pull rope is wound on the rope shaft 29. The end of the pull rope away from the rope shaft 29 is fixedly connected to the extension pipe 28. An auxiliary wheel 31 is rotatably connected to the placement rack 26. The pull rope is set to abut against the auxiliary wheel 31. In this design, the drive motor 24, in conjunction with the connecting rod 25 and the placement rack 26, is used to automatically replace the fourth-stage filter element 7 and the post-activated carbon 8 when the pressure difference sensed by the two pressure sensors is large. This is especially suitable for users with elderly people or children at home who are inconvenient to replace filter elements. The young adults can replace the filter elements independently while the young adults are away at work, ensuring the water supply at home. Users only need to replace the fourth-stage filter element 7 and the post-activated carbon 8 located on the placement rack 26 within a certain period.

[0037] Furthermore, the sewage discharge assembly includes a circular tube 40 slidably connected to the inner wall of the pipe 3, and a return spring 41 is provided at one end of the circular tube 40. The return spring 41 is fixedly connected to the inner wall of the pipe 3. A one-way valve is provided at one end of the circular tube 40. A sewage outlet is opened on one side of the circular tube 40. A sewage discharge pipe 42 is connected to the side wall of the pipe 3 near the sewage outlet, and the sewage discharge pipe 42 is connected to the second water outlet pipe 22. The two sewage discharge assemblies are respectively arranged between the second-stage filter element 5 and the third-stage filter element 6, and between the third-stage filter element 6 and the fourth-stage filter element 7. Although the filtration pore sizes of the different filter elements are different, they all filter extremely fine particulate impurities. During backwashing, the upstream filter element still affects the discharge of water into the second outlet pipe after backwashing. When the backwashing unit is running, the sewage containing impurities flows from the downstream filter element to the upstream filter element, which drives the circular pipe 40 to move towards the upstream filter element. In conjunction with the one-way valve, the water in the pipe flows towards the upstream filter element. The high-pressure water generated by the backwashing unit causes the water in the pipe to flow back quickly, achieving the backwashing effect on each stage of the filter element. After the circular pipe 40 moves to the sewage outlet, the water containing impurities flows into the second outlet pipe 22 along the sewage pipe 42, thereby preventing the upstream filter element from blocking the impurities from the downstream filter element after backwashing and ensuring that the impurities from backwashing can be discharged smoothly.

[0038] Furthermore, the booster pipe 10 is located between the first outlet pipe 9 and the post-activated carbon 8, and the backwash pipe is located between the third-stage filter element 6 and the fourth-stage filter element 7. The closer the booster pipe 10 is to the outlet pipe, the better it buffers the water hammer effect and the greater the kinetic energy it absorbs. While ensuring the backwash effect, it avoids damage to the filter components caused by the water hammer effect. However, the backwash pipe has a relatively high water pressure, while the fourth-stage filter element 7 and the post-activated carbon 8 have high filtration precision. Not only is the backwash effect poor, but high-pressure backwashing may also damage them. Therefore, the backwash pipe is only used to backwash the third-stage filter and its preceding filter elements, mainly targeting particulate impurities remaining on the third-stage filter and its preceding filter elements, rather than the finer impurities such as bacteria blocked by the fourth filter element.

[0039] Furthermore, the water storage shell 17 is disc-shaped, and a buffer cavity 32 is provided on one side of the water storage shell 17. A sealing plug 33 is slidably connected in the buffer cavity 32. The blade 18 is interference-fitted with the inner wall of the water storage shell 17. In this design, the water storage shell 17 is used to buffer a certain amount of water when the backwash component is storing energy, and then the water in the water storage shell 17 is used to backwash the filter component when the backwash component is running.

[0040] Furthermore, a transition shell 34 is provided at the connection between the backwash pipe and the pipe 3. The transition shell 34 has a stepped surface inside, and a baffle 35 is rotatably connected to the side wall of the transition shell 34 near the stepped surface via a spring shaft. In actual use, since multiple people may be using water in a household, in order to prevent water with high pressure during the operation of the backwash assembly and water that has not been filtered by the first-stage filter element 4, the second-stage filter element 5, and the third-stage filter element 6 from flowing directly to the fourth-stage filter element 7, the baffle 35 connected by the spring shaft is set as a one-way valve to block the backwash water from flowing towards the first outlet pipe 9, thereby avoiding damage to the fourth-stage filter element 7.

[0041] Furthermore, the adapter includes a circular tube 36, a limiting ring 37 is fixedly connected inside the circular tube 36, and a plug 39 is slidably connected inside the circular tube 36. A second compression spring 38 is also fixedly connected inside the circular tube 36, and the second compression spring 38 is abutted against the plug 39. The adapter is provided to cooperate with the extension tube 28 to ensure the connection between the extension tube 28 and the first water outlet pipe 9 and the post-activated carbon 8, and to ensure its sealing to prevent water leakage during the switching process.

[0042] In this invention, during installation, the user places the water purifier in the kitchen and connects the tap water pipe to the inlet pipe 2. Then, the first outlet pipe 9 is connected to the kitchen faucet, while the second outlet pipe 22 is connected to the water for cleaning or bathroom use, or directly to the water heater for showering. Although the water discharged from the second outlet pipe 22 contains some impurities filtered by the filter components, the water source is tap water, with low impurity content and a high backwash frequency, ensuring that the water discharged from the second outlet pipe 22 still meets the needs of daily cleaning. After tap water enters the water purifier through the inlet pipe 2, it is purified by the filter components to meet the hygiene standards for direct drinking water. Solid particles in the tap water and... Larger impurities are blocked by the first-stage filter element 4, the second-stage filter element 5, and the third-stage filter element 6. During daily water use, users inevitably turn the faucet on and off. When the faucet is closed, the water hammer effect generates an impact force in the outlet pipe. This impact force drives the piston 11 in the booster pipe 10 to move upwards. The piston 11, in conjunction with the crossbar 12, drives the rotating arm 14 to rotate. The rotating arm 14 then drives the drive rod 15 to rotate via a one-way bearing. The rotation of the drive rod 15 causes the blade 18 located inside the water storage shell 17 to rotate. Simultaneously, the torsion spring 16 converts the kinetic energy into elastic potential energy for storage. When the faucet is turned on, the blade returns to its initial position under the influence of the negative water hammer effect. This design fully utilizes the time spent turning the faucet on and off in daily water use. The water hammer effect generated by pipe 3, while protecting pipe 3, converts the impact force of the water hammer effect into the potential energy of the torsional force and stores it. Generally, in daily household water use, the faucet connected to the first outlet pipe 9 is used more frequently, while the cleaning water connected to the second outlet pipe 22 is used less frequently. This allows the backwash component to accumulate a large amount of potential energy after the user has used the water flowing from the first outlet pipe 9 multiple times. When the user uses the water discharged from the second outlet pipe 22, the solenoid valve and electromagnet 20 located on the backwash pipe are activated simultaneously. Electromagnet 20 uses magnetic force to drive the ratchet to rotate, so that the ratchet no longer restricts the ratchet 19, and the two-position three-way solenoid valve switches to the state where pipe 3 is connected to the second outlet pipe 22. When the torsion spring 16 drives the blade 18 to rotate, it uses its elastic potential energy to convert into kinetic energy to apply greater pressure to the water. This causes the water in the water storage tank 17 to enter the pipe 3 along the backwash pipe. In conjunction with the sewage discharge component, the third-stage filter element 6, the second-stage filter element 5, and the first-stage filter element 4 are backwashed in sequence. This washes off the impurities that remain on the first-stage filter element 4, the second-stage filter element 5, and the third-stage filter element 6, and discharges the impurities, thus achieving self-cleaning of the filter components. It features high backwashing frequency, high degree of automation, and low equipment energy consumption. At the same time, due to its high backwashing frequency, it is difficult for stubborn impurities to remain on the first-stage filter element 4, the second-stage filter element 5, and the third-stage filter element 6, which can maintain a clean state for a long time. The pressure and water consumption required for backwashing are also relatively small.

[0043] On the other hand, during daily use, since the fourth-stage filter element 7 and the post-activated carbon 8 are difficult to clean directly using backwashing, two pressure sensors are installed to monitor the water pressure before and after the fourth-stage filter element 7 and the post-activated carbon 8. When the pressure difference is too large, the control module controls the drive motor 24 to run. When the drive motor 24 runs, it drives the rope shaft 29 to rotate. The rope shaft 29, in turn, uses the pull rope and the auxiliary wheel 31 to move the two extension tubes 28 closer to each other, so that the extension tubes 28 are connected to the adapter. The head detaches, and the pull rope is then straightened. The drive motor 24 drives the placement rack 26 to rotate, causing the two placement racks 26 to interchange positions. Finally, the drive motor 24 releases the pull rope, and the first compression spring 30 drives the extension tube 28 to insert into the adapter, realizing the connection between the pipe 3 and the adapter tube 27. This completes the replacement of the fourth-stage filter element 7 and the post-activated carbon 8. This design is mainly for situations where adults in the family are at work, and only the elderly and children in the family do not need to replace the fourth-stage filter element 7 and the post-activated carbon 8. It meets the actual needs of modern families and ensures the supply of drinking water in the family.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-stage intelligent water purifier, characterized in that, Includes a housing (1), on which a water inlet pipe (2) is connected, and a filter assembly is also provided inside the housing (1), wherein: The filter assembly includes a pipe (3) connected to the inlet pipe (2). The housing (1) is provided with a first-stage filter element (4), a second-stage filter element (5), a third-stage filter element (6), a fourth-stage filter element (7) and a post-activated carbon (8) connected in sequence through the pipe (3). The housing (1) is also provided with a backwashing assembly. A first outlet pipe (9) is connected to one side of the housing (1). The second-stage filter element (5) and the third-stage filter element (6) are also provided with a sewage discharge assembly. The first outlet pipe (9) is connected to the pipe (3) near the post-activated carbon (8). The backwash assembly includes a booster pipe (10) connected to the pipe (3). A piston (11) is slidably connected inside the booster pipe (10), and a crossbar (12) is fixedly connected to the upper end of the piston (11). A shaft (13) is rotatably connected to the end of the booster pipe (10) away from the pipe (3), and a rotating arm (14) is fixedly connected to the side wall of the shaft (13). A slotted groove is provided on the side wall of the rotating arm (14), and the slotted groove of the crossbar (12) is slidably connected. A drive rod (15) is rotatably connected to one end of the shaft (13) through a one-way bearing, and a torsion spring (16) is sleeved on the side wall of the drive rod (15). A water storage shell (17) is fixedly connected inside the housing (1), and the drive rod (15) is installed through the water storage shell (17). The drive rod (15) is located inside the water storage shell (17). A blade (18) is fixedly connected to the side wall of the moving rod (15). The water storage shell (17) is also connected to the pipe (3) through a backflush pipe. An electromagnetic valve is provided on the backflush pipe. The torsion spring (16) is fixedly connected to the side wall of the water storage shell (17). A ratchet (19) is also sleeved on the side wall of the driving rod (15). A ratchet tooth matching the ratchet (19) is rotatably connected to the side wall of the water storage shell (17). An electromagnet (20) is also fixedly connected to the side wall of the water storage shell (17) near the ratchet tooth. A diversion pipe (21) is connected to the water inlet pipe (2). The diversion pipe (21) is connected to the water storage shell (17) through a one-way valve. A two-position three-way electromagnetic valve is connected to one end of the pipe (3) near the water inlet pipe (2). The two-position three-way electromagnetic valve is also connected to the second outlet pipe (22). The booster pipe (10) is located between the first outlet pipe (9) and the post-activated carbon (8), and the backwash pipe is located between the third-stage filter element (6) and the fourth-stage filter element (7). The sewage discharge assembly includes a circular pipe that is slidably connected to the inner wall of the pipe (3), and a return spring (41) is provided at one end of the circular pipe. The return spring (41) is fixedly connected to the inner wall of the pipe (3). A one-way valve is provided at one end of the circular pipe. A sewage outlet is opened on one side of the circular pipe. A sewage pipe (42) is connected to the side wall of the pipe (3) near the sewage outlet. The sewage pipe (42) is connected to the second water outlet pipe (22). A transition shell (34) is provided at the connection between the backflushing pipe and the pipe (3). A stepped surface is provided inside the transition shell (34), and a baffle (35) is rotatably connected to the side wall of the transition shell (34) near the stepped surface through a spring shaft.

2. The multi-stage intelligent water purifier according to claim 1, characterized in that, A mounting bracket (23) is fixedly connected inside the housing (1). A drive motor (24) is fixedly connected to the mounting bracket (23), and a connecting rod (25) is rotatably connected to the output end of the drive motor (24). Two placement brackets (26) are fixedly connected to the connecting rod (25). The fourth-stage filter element (7) and the post-activated carbon (8) are located on the placement brackets (26), and a transfer tube (27) is provided on the placement brackets (26). The transfer tube (27) is connected to the fourth-stage filter element (7) and the post-activated carbon (8), and pressure sensors are provided at both ends of the transfer tube (27). The pressure sensors are electrically connected to an electronic control module through wires. The block is electrically connected to the drive motor (24). Both ends of the adapter pipe (27) are slidably fitted with extension pipes (28), and the extension pipes (28) are fixedly connected to the outer wall of the adapter pipe (27) through the first compression spring (30). The pipe (3) is fixedly connected to the adapter near the extension pipe (28). The output end of the drive motor (24) is fixedly connected to the rope shaft (29), and a pull rope is wound on the rope shaft (29). The end of the pull rope away from the rope shaft (29) is fixedly connected to the extension pipe (28). An auxiliary wheel (31) is rotatably connected to the placement frame (26), and the pull rope is set against the auxiliary wheel (31).

3. The multi-stage intelligent water purifier according to claim 1, characterized in that, The water storage shell (17) is disc-shaped, and a buffer cavity (32) is provided on one side of the water storage shell (17). A sealing plug (33) is slidably connected in the buffer cavity (32), and the blade (18) is interference-fitted with the inner wall of the water storage shell (17).

4. A multi-stage intelligent water purifier according to claim 2, characterized in that, The electronic control module includes a signal processor, a battery unit, and a motor controller.

5. A multi-stage intelligent water purifier according to claim 2, characterized in that, The adapter includes a round tube, a limit ring (37) is fixedly connected inside the round tube, and a plug (39) is slidably connected inside the round tube. A second compression spring (38) is also fixedly connected inside the round tube, and the second compression spring (38) is abutted against the plug (39).

6. A multi-stage intelligent water purifier according to claim 1, characterized in that, The first-stage filter element (4), the second-stage filter element (5), and the third-stage filter element (6) are respectively a PP cotton filter element, a granular activated carbon filter element, and a precision compressed activated carbon filter element.

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