Filtering device for water purifier

Abstract

The invention discloses a filtering device for a water purifier and relates to the technical field of water purifiers, the filtering device comprises a shell and a cleaning assembly, a water inlet pipe is arranged at the lower end of one side of the shell, a water outlet pipe is connected to the center of the top of the shell, a blow-off pipe is connected to the bottom of the shell, and a filtering cylinder is fixed to the upper end of the interior of the shell; the cleaning assembly is arranged at the upper end of the interior of the shell. When the pump body conveys water flow into the shell from the water inlet pipe, the end cover can seal the blow-off pipe, so that the water pressure of the lower end in the shell is increased, the water flow can push a scraping ring to move upwards, a compression spring is shrunk, and when the scraping ring moves to the upper end in the shell, a transmission rod is extruded through a limiting ring, so that the scraping ring is driven to rotate; the connecting rod pulls the pressing block to move upwards through the transmission frame, the driving block can have a certain moving space, water flow can push the needle plate to be separated from the filter cartridge, and therefore when water flows, the filter cartridge can block particle impurities in the water.

Description

Technical Field

[0001] The invention relates to the technical field of water purifiers, in particular to a filtering device for a water purifier. Background Art

[0002] A water purifier, also called a water purifier or a water purifier, is a water treatment device that deeply filters and purifies water according to the requirements of water use. The water purifier we usually talk about generally refers to a small purifier for home use. The water is pre-treated through a filtering device before entering the water purifier.

[0003] For example, the invention of application number CN202210196017.3 discloses a water purifier filter device. This invention realizes automatic cleaning and collection of impurities through the power of the tap water flow itself, and at the same time collects the impurities in the impurity removal port, which is not easy to diffuse outward. It has a simple structure, is easy to repair and maintain, and has low cost of use. However, in the actual use of this type of device, since the surface of the filter plate is scraped and cleaned by a scraper, once the impurity particles are partially embedded in the sieve holes, the scraper cannot push these impurity particles and scrape them clean, and when there are too many blocked impurities, the scraper will be stuck during movement, causing problems that affect the normal use of the device.

[0004] Therefore, in view of this, research and improvement are conducted on the existing structure and defects, and a filtering device for a water purifier is proposed. Summary of the invention

[0005] The object of the present invention is to provide a filtering device for a water purifier to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a filtering device for a water purifier, comprising a shell and a cleaning component, a water inlet pipe is arranged at the lower end of one side of the shell, and a water outlet pipe is connected to the top center of the shell, a sewage pipe is connected to the bottom of the shell, and a filter cartridge is fixed to the inner upper end of the shell, the cleaning component is arranged at the inner upper end of the shell, the cleaning component comprises a compression spring, a scraper ring, a limit ring, a transmission rod, a hanging cover, a connecting rod, a transmission frame, a reset spring, a pressure block, a driving block, a needle plate and a guide plate, a compression spring is arranged at the inner upper end of the shell, and a scraper ring is connected to the bottom of the compression spring, the scraper ring is slidably connected to the filter cartridge, and A limiting ring is fixed on the top of the scraper ring, and a transmission rod is slidably connected to the inside of the upper end of the filter cartridge, and one end of the transmission rod is inclined, and a hanging cover is slidably connected to the outside of the other end of the transmission rod, and the hanging cover is fixedly connected to the shell, and a connecting rod is rotatably connected to the bottom center of the transmission rod, and the bottom of the connecting rod is rotatably connected to the transmission frame, a return spring is provided at the top center of the transmission frame, and a pressure block is connected to the bottom of the transmission frame, and the pressure block is conical, and a driving block is slidably connected to the bottom of the pressure block, and a needle plate is arranged on one side of the driving block, the needle plate is slidably connected to the filter cartridge, and a guide plate is arranged on the lower end of one side of the needle plate, and the guide plate is slidably connected to the filter cartridge.

[0007] Furthermore, an anti-blocking component is provided in the middle part of the hanging cover, and the anti-blocking component includes a blade shaft, a center gear and a planetary gear. The inside of the water outlet pipe is provided with a blade shaft, and the blade shaft is rotatably connected to the hanging cover. A center gear is arranged at the lower end of the blade shaft, and a planetary gear is meshed on the outer side of the center gear, and the planetary gear is rotatably connected to the hanging cover.

[0008] Furthermore, the anti-blocking component also includes a ring gear, a connecting plate and a drive shaft. A ring gear is meshed on one side of the planetary gear, and a connecting plate is fixed to the bottom of the ring gear. A drive shaft is arranged at the center of the bottom of the connecting plate, and the drive shaft is rotatably connected to the hanging cover, the drive shaft is slidably connected to the transmission frame, and the drive shaft is rotatably connected to the filter cartridge.

[0009] Furthermore, the anti-blocking component also includes a guide groove, a transmission block and a limit plate. A guide groove is opened on the outer side of the middle part of the driving shaft, and a transmission block is slidably connected to the inside of the guide groove. The transmission block is fixedly connected to the pressure block, and a limit plate is arranged at the bottom of the pressure block.

[0010] Furthermore, a shielding assembly is provided at the bottom of the filter cartridge, and the shielding assembly includes a fixed plate, a rotating plate and a sliding column. The bottom of the filter cartridge is provided with a fixed plate, and the bottom of the fixed plate is rotatably connected to a rotating plate. The rotating plate is obtuse-angled, and a sliding column is fixed to one end of the rotating plate.

[0011] Furthermore, the shielding assembly also includes a connecting ear and a lifting sleeve, the outer side of the sliding column is sleeved with the connecting ear, and the lifting sleeve is fixed to one side of the connecting ear, and the inner diameter of the lifting sleeve is larger than the inner diameter of the sewage pipe.

[0012] Furthermore, the shielding assembly also includes a sponge pad and a blocking column. The sponge pad is placed on the bottom of the lifting sleeve, and the inner part of the lifting sleeve is slidably connected to the blocking column, and the blocking column is fixedly connected to the filter cartridge.

[0013] Furthermore, an anti-sticking component is provided at the lower end of the shell, and the anti-sticking component includes a driving column, a limiting groove and a limiting column. The bottom of the blocking column is rotatably connected to the driving column, and a limiting groove is opened at the bottom of the driving column. The limiting groove is hexagonal, and the inside of the limiting groove is slidably connected to the limiting column.

[0014] Furthermore, the anti-sticking component also includes an end cap, a handle and a sealing ring. The end cap is fixed to the bottom of the limiting column, and the end cap is threadedly connected to the sewage pipe. The bottom of the end cap is provided with a handle, and a sealing ring is arranged on the inner bottom surface of the end cap.

[0015] Furthermore, the anti-sticking component also includes a first scraper and a second scraper. The first scraper is fixed to the outside of the driving column and is slidably connected to the sewage pipe. The top of the first scraper is connected to the second scraper, and the second scraper is inclined and is slidably connected to the shell.

[0016] The present invention provides a filtering device for a water purifier, which has the following beneficial effects:

[0017] 1. When the pump body of the present invention delivers water from the water inlet pipe to the shell, the end cover will close the sewage pipe, so that the water pressure at the lower end of the shell will increase, and the water flow will push the scraper ring to move upward, causing the compression spring to contract. When the scraper ring moves to the upper end of the shell, it will squeeze the transmission rod through the limit ring, so that the connecting rod pulls the pressure block upward through the transmission frame, and the driving block will have a certain moving space. Therefore, the water flow will push the needle plate to separate it from the filter cartridge, so that when the water flows, the filter cartridge will block the particulate impurities in the water. When not in use, the water pressure is gradually reduced by controlling the pump body, and the scraper ring will move downward to separate the limit ring from the transmission rod. Then the return spring will squeeze the transmission frame under the limit of the hanging cover to move the pressure block downward, so that all the needle plates are inserted into the filter cartridge through the drive block to push out the impurity particles inside, avoid the residue of impurity particles and improve the cleaning effect. Then, as the scraper ring continues to move downward, the impurities can be scraped from the surface of the filter cartridge to the lower end of the shell and settled in the sewage pipe for collection of the impurity particles.

[0018] 2. The filtered water of the present invention will be discharged from the water outlet pipe, and the water flow will also drive the fan blade shaft to rotate. At this time, the reduction structure of the central gear, planetary gear and ring gear can provide a large torque, so that the connecting plate drives the driving shaft to rotate. At the same time, due to the upward movement of the pressure block, the limit plate will also be driven to move up, and the limit plate will squeeze the bottom of the driving block, so that the needle plate can be inserted into the filter hole on the filter cartridge, and when the limit plate is separated from the driving block, the needle plate can be separated from the filter cartridge under the push of the water flow. Therefore, when the driving shaft rotates, it will drive the pressure block to rotate through the guide groove and the transmission block, so that the limit block contacts with multiple driving blocks one by one, and the filter hole of the filter cartridge can be cleaned, thereby preventing the filter cartridge from being blocked during long-term use.

[0019] 3. When the scraper ring moves downward, the present invention will also squeeze the rotating plate to make it rotate around the bottom of the fixed plate, thereby pulling the connecting ear through the sliding column to make the lifting sleeve move upward along the blocking column. Therefore, in the process of impurity sedimentation, the impurity particles will fall into the sewage pipe under the guidance of the inclined surface of the shell, and in the filtering process, the scraper ring will not squeeze the rotating plate due to the upward movement. At this time, the lifting sleeve will move downward under the action of gravity and cooperate with the blocking column to block the top of the sewage pipe, thereby preventing the internal impurities from re-floating under the interference of the water flow, reducing the interference during filtration, and at the same time, the sponge pad can improve the fit between the bottom of the lifting sleeve and the shell and the second scraper, thereby blocking impurities from passing through.

[0020] 4. When the impurities accumulated inside the sewage pipe are discharged, the present invention can open the sewage pipe by rotating the end cover by the handle. At the same time, in the process of rotating the end cover, the first scraper and the second scraper can be driven to rotate by the limiting column and the limiting groove, so that the scale and impurities adhered to the inner side of the lower end of the shell can be scraped off and suspended in the water. After opening the end cover, the impurities can be discharged with the water flow, thereby improving the cleaning effect. The second scraper is inclined, and the driving column can also guide the impurities when rotating in the direction of the inclination of the second scraper, so that it is easier to gather to the sewage pipe, thereby facilitating the discharge of impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the internal structure of the housing of the filtering device for a water purifier of the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the cleaning component of the filtering device for a water purifier of the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the needle plate of the filtering device for a water purifier of the present invention;

[0024] Figure 4 It is a schematic diagram of the internal three-dimensional structure of the hanging cover of the filtering device for a water purifier of the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the transmission frame of the filtering device for a water purifier of the present invention;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the shielding component of the filtering device for a water purifier of the present invention;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the end cover of the filtering device for a water purifier of the present invention.

[0028] In the figure: 1, housing; 2, water inlet pipe; 3, water outlet pipe; 4, sewage pipe; 5, filter cartridge; 6, cleaning assembly; 601, compression spring; 602, scraper ring; 603, limit ring; 604, transmission rod; 605, hanging cover; 606, connecting rod; 607, transmission frame; 608, return spring; 609, pressure block; 610, driving block; 611, needle plate; 612, guide plate; 7, anti-blocking assembly; 701, fan shaft; 702, central gear; 703, planetary gear; 704, ring gear; 705, connecting plate; 706, driving shaft; 707, guide groove; 708, transmission block; 709, limit plate; 8, shielding assembly; 801, fixed plate; 802, rotating plate; 803, sliding column; 804, connecting ear; 805, lifting sleeve; 806, sponge pad; 807, stop column; 9, anti-sticking assembly; 901, driving column; 902, limit groove; 903, limit column; 904, end cover; 905, handle; 906, sealing ring; 907, first scraper; 908, second scraper. DETAILED DESCRIPTION

[0029] See also Figures 1 to 7The present invention provides a technical solution: a filtering device for a water purifier, comprising a shell 1 and a cleaning component 6, a water inlet pipe 2 is arranged at the lower end of one side of the shell 1, and a water outlet pipe 3 is connected to the top center of the shell 1, a sewage pipe 4 is connected to the bottom of the shell 1, and a filter cartridge 5 is fixed to the inner upper end of the shell 1, and the cleaning component 6 is arranged at the inner upper end of the shell 1, and the cleaning component 6 comprises a compression spring 601, a scraper ring 602, a limit ring 603, a transmission rod 604, a hanging cover 605, a connecting rod 606, a transmission frame 607, a reset spring 608, a pressure block 609, a driving block 610, a needle plate 611 and a guide plate 612, a compression spring 601 is arranged at the inner upper end of the shell 1, and a scraper ring 602 is connected to the bottom of the compression spring 601, the scraper ring 602 is slidably connected to the filter cartridge 5, and the top of the scraper ring 602 is fixed with The limiting ring 603, the transmission rod 604 is slidably connected to the inner part of the upper end of the filter cartridge 5, and one end of the transmission rod 604 is inclined, and the other end of the transmission rod 604 is slidably connected to the outer side of the suspension cover 605, and the suspension cover 605 is fixedly connected to the shell 1, the bottom center of the transmission rod 604 is rotatably connected to the connecting rod 606, and the bottom of the connecting rod 606 is rotatably connected to the transmission frame 607, a return spring 608 is provided at the top center of the transmission frame 607, and a pressure block 609 is connected to the bottom of the transmission frame 607, and the pressure block 609 is conical, and the bottom of the pressure block 609 is slidably connected to the driving block 610, and a needle plate 611 is arranged on one side of the driving block 610, the needle plate 611 is slidably connected to the filter cartridge 5, and a guide plate 612 is arranged on the lower end of one side of the needle plate 611, and the guide plate 612 is slidably connected to the filter cartridge 5.

[0030] See also Figures 1 to 5 , an anti-blocking component 7 is arranged in the middle of the hanging cover 605, and the anti-blocking component 7 includes a blade shaft 701, a central gear 702 and a planetary gear 703. The inside of the water outlet pipe 3 is provided with a blade shaft 701, and the blade shaft 701 is rotatably connected to the hanging cover 605. A central gear 702 is arranged at the lower end of the blade shaft 701, and a planetary gear 703 is meshed on the outer side of the central gear 702, and the planetary gear 703 is rotatably connected to the hanging cover 605. The anti-blocking component 7 also includes a ring gear 704, a connecting plate 705 and a driving shaft 706. A ring gear 704 is meshed on one side of the planetary gear 703, and the ring gear 7 A connecting plate 705 is fixed to the bottom of 04, a driving shaft 706 is arranged at the center of the bottom of the connecting plate 705, and the driving shaft 706 is rotatably connected to the hanging cover 605, the driving shaft 706 is slidably connected to the transmission frame 607, and the driving shaft 706 is rotatably connected to the filter cartridge 5, the anti-blocking component 7 also includes a guide groove 707, a transmission block 708 and a limit plate 709, a guide groove 707 is opened on the outer side of the middle part of the driving shaft 706, and a transmission block 708 is slidably connected inside the guide groove 707, the transmission block 708 is fixedly connected to the pressing block 609, and a limit plate 709 is arranged at the bottom of the pressing block 609;

[0031] The specific operation is as follows: the pump body will transport water into the housing 1 through the water inlet pipe 2, and as the water pressure at the lower end of the housing 1 increases, the water flow will push the scraper ring 602 to move upward, causing the compression spring 601 to contract, and when the scraper ring 602 moves to the upper end of the housing 1, it will squeeze the transmission rod 604 through the limit ring 603, so that the connecting rod 606 pulls the pressure block 609 upward through the transmission frame 607. At the same time, during the upward movement of the pressure block 609, it will also drive the limit plate 709 to move upward, and the limit plate 709 will squeeze the single The bottom of the driving block 610 allows the needle plate 611 to be inserted into the filter hole on the filter cartridge 5, and the other driving blocks 610 have a certain amount of moving space, so the water flow will push the needle plate 611 to separate it from the filter cartridge 5, and the guide plate 612 will improve the stability of the needle plate 611 when it moves. Later, when it circulates, the filter cartridge 5 will block the particulate impurities in the water, and the filtered water will be discharged into the water purifier through the outlet pipe 3. In this process, the water flow will also drive the fan shaft 701 to rotate. At this time, the fan shaft 701 is used to The reduction structure of the central gear 702, the planetary gear 703 and the ring gear 704 can provide a large torque, so that the connecting plate 705 drives the driving shaft 706 to rotate, and then drives the pressing block 609 to rotate through the guide groove 707 and the transmission block 708, so that the limit plate 709 contacts with multiple driving blocks 610 one by one, and the filter holes of the filter cartridge 5 can be ejected and cleaned, thereby preventing the filter cartridge 5 from being blocked during long-term use. When not in use, the water pressure is gradually reduced by controlling the pump body, and the scraper ring 602 will move downward to separate the limiting ring 603 from the transmission rod 604, and then the return spring 608 will squeeze the transmission frame 607 under the limit of the hanging cover 605, so that the pressure block 609 moves downward, so that all the needle plates 611 are inserted into the filter cartridge 5 through the driving block 610, and the impurity particles inside are pushed out to avoid the impurity particles from remaining. Then, as the scraper ring 602 continues to move downward, the impurities can be scraped from the surface of the filter cartridge 5 to the lower end of the shell 1 and settled in the sewage pipe 4 so that the impurity particles can be collected.

[0032] See also Figure 6 and Figure 7, a shielding assembly 8 is provided at the bottom of the filter cartridge 5, and the shielding assembly 8 includes a fixed plate 801, a rotating plate 802 and a sliding column 803. A fixed plate 801 is arranged at the bottom of the filter cartridge 5, and the bottom of the fixed plate 801 is rotatably connected to the rotating plate 802, the rotating plate 802 is obtuse, and a sliding column 803 is fixed to one end of the rotating plate 802. The shielding assembly 8 also includes a connecting ear 804 and a lifting sleeve 805. The outer side of the sliding column 803 is sleeved with a connecting ear 804, and a lifting sleeve 805 is fixed to one side of the connecting ear 804, and the inner diameter of the lifting sleeve 805 is larger than the inner diameter of the sewage pipe 4. The shielding assembly 8 also includes a sponge pad 806 and a blocking column 807. A sponge pad 806 is arranged at the bottom of the lifting sleeve 805, and the inner side of the lifting sleeve 805 is slidably connected to the blocking column 807, and the blocking column 807 is fixedly connected to the filter cartridge 5. An anti-sticking assembly 9 is provided at the lower end of the shell 1, and the anti-sticking assembly 9 includes a driving column 901 , a limiting groove 902 and a limiting column 903, the bottom of the blocking column 807 is rotatably connected to the driving column 901, and the bottom of the driving column 901 is provided with a limiting groove 902, the limiting groove 902 is hexagonal, and the inner part of the limiting groove 902 is slidably connected to the limiting column 903, the anti-sticking component 9 also includes an end cap 904, a handle 905 and a sealing ring 906, the bottom of the limiting column 903 is fixed with an end cap 904, and the end cap 904 is threadedly connected to the sewage pipe 4, and the end A handle 905 is provided at the bottom of the cover 904, and a sealing ring 906 is arranged on the inner bottom surface of the end cover 904. The anti-sticking component 9 also includes a first scraper 907 and a second scraper 908. The first scraper 907 is fixed to the outer side of the driving column 901, and the first scraper 907 is slidably connected to the sewage pipe 4. The top of the first scraper 907 is connected to the second scraper 908, and the second scraper 908 is inclined, and the second scraper 908 is slidably connected to the housing 1.

[0033] The specific operation is as follows. During use, when the scraper ring 602 moves up, the lifting sleeve 805 will move down under the action of gravity, and cooperate with the blocking column 807 to cover the top of the sewage pipe 4, so as to prevent the internal impurities from floating up again under the interference of the water flow, reduce the interference during filtration, and at the same time, the sponge pad 806 can be used to improve the fit between the bottom of the lifting sleeve 805 and the shell 1 and the second scraper 908. When the filtering device is not in use, as the scraper ring 602 moves down, it will squeeze the rotating plate 802 to make it rotate around the bottom of the fixed plate 801, so that By pulling the connecting ear 804 through the sliding column 803, the lifting sleeve 805 moves up along the blocking column 807, so that the foreign particles will fall into the sewage pipe 4 under the guidance of the inclined surface of the shell 1. Afterwards, when the end cover 904 is rotated by the handle 905, the first scraper 907 and the second scraper 908 can also be driven to rotate through the limiting column 903 and the limiting groove 902, so as to scrape off the scale and impurities adhered to the inner side of the lower end of the shell 1. At the same time, the impurities will be suspended in the water under the stirring of the scraper, and after opening the end cover 904, the impurities can be discharged with the water flow, thereby improving the cleaning effect.

[0034] In summary, when the filtering device for a water purifier is used, first, the pump body will transport water into the shell 1 through the water inlet pipe 2, and as the water pressure at the lower end of the shell 1 increases, the water flow will push the scraper ring 602 to move upward, causing the compression spring 601 to contract. At this time, the lifting sleeve 805 will move downward under the action of gravity, and cooperate with the blocking column 807 to block the top of the sewage pipe 4, thereby preventing the internal impurities from re-floating under the interference of the water flow. At the same time, the sponge pad 806 can be used to improve the fit between the bottom of the lifting sleeve 805 and the shell 1 and the second scraper 908. Then, when the scraper ring 602 moves to the upper end of the shell 1, it will squeeze the transmission rod 604 through the limit ring 603, so that the connecting rod 606 pulls the pressure block 609 upward through the transmission frame 607. The limit plate 709 will move upwards, and the limit plate 709 will squeeze the bottom of the single driving block 610, so that the single needle plate 611 can be inserted into the filter hole on the filter cartridge 5, and the other driving blocks 610 will have a certain moving space. Therefore, the water flow will push the needle plate 611 to separate it from the filter cartridge 5. At the same time, the guide plate 612 will improve the stability of the needle plate 611 when it moves, and can also limit its moving position. Secondly, the filter cartridge 5 will block the particulate impurities in the water, and the filtered water will be discharged into the water purifier through the water outlet pipe 3. In this process, the water flow will also drive the fan shaft 701 to rotate. At this time, the speed reduction structure of the central gear 702, the planetary gear 703 and the ring gear 704 is used. It can provide a large torque, so that the connecting plate 705 drives the driving shaft 706 to rotate, and then drives the pressing block 609 to rotate through the guide groove 707 and the transmission block 708, so that the limit plate 709 contacts with multiple driving blocks 610 one by one, and the filter holes in the filter cartridge 5 can be ejected and cleaned. Then, when the filtering device is not in use, the water pressure is gradually reduced by controlling the pump body. At this time, the scraper ring 602 will move downward to separate the limit ring 603 from the transmission rod 604, and then the return spring 608 will squeeze the transmission frame 607 under the limit of the hanging cover 605, so that the pressing block 609 moves downward, so that all the needle plates 611 are inserted into the filter cartridge 5 through the driving block 610, and the impurity particles inside it are ejected. Then, as the scraper ring 602 continues to move downward, the impurities can be removed from The surface of the filter cartridge 5 is scraped to the lower end of the interior of the shell 1, and when the scraper ring 602 moves downward, it also squeezes the rotating plate 802 to rotate around the bottom of the fixed plate 801, thereby pulling the connecting ear 804 through the sliding column 803, so that the lifting sleeve 805 moves up along the blocking column 807. Therefore, in the process of impurity sedimentation, the impurity particles will fall into the sewage pipe 4 under the guidance of the inclined surface of the shell 1. Finally, during cleaning and maintenance, the end cover 904 is rotated by the handle 905, and the first scraper 907 and the second scraper 908 are driven to rotate through the limiting column 903, the limiting groove 902 and the driving column 901, so that the scale and impurities adhered to the inner side of the lower end of the shell 1 can be scraped off, and the impurities will be suspended in the water under the stirring of the scraper, so that after opening the end cover 904,Impurities can be discharged with the water flow.

[0035] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A filtering device for a water purifier, characterized in that: The invention comprises a shell (1) and a cleaning assembly (6), wherein a water inlet pipe (2) is arranged at the lower end of one side of the shell (1), and a water outlet pipe (3) is connected to the center of the top of the shell (1), a sewage discharge pipe (4) is connected to the bottom of the shell (1), and a filter cartridge (5) is fixed to the upper end of the interior of the shell (1), and the cleaning assembly (6) is arranged at the upper end of the interior of the shell (1), and comprises a compression spring (601), a scraper ring (602), a stop ring (603), a transmission rod (604), and a filter cartridge (5) is fixed to the upper end of the interior of the shell (1). (604), a hanging cover (605), a connecting rod (606), a transmission frame (607), a return spring (608), a pressure block (609), a driving block (610), a needle plate (611) and a guide plate (612), a compression spring (601) is arranged on the inner upper end of the housing (1), and a scraper ring (602) is connected to the bottom of the compression spring (601), the scraper ring (602) is slidably connected to the filter cartridge (5), and a limit ring (602) is fixed to the top of the scraper ring (602). 3), a transmission rod (604) is slidably connected to the interior of the upper end of the filter cartridge (5), and one end of the transmission rod (604) is inclined, and a hanging cover (605) is slidably connected to the outside of the other end of the transmission rod (604), and the hanging cover (605) is fixedly connected to the housing (1), and a connecting rod (606) is rotatably connected to the bottom center of the transmission rod (604), and the bottom of the connecting rod (606) is rotatably connected to a transmission frame (607), and the top center of the transmission frame (607) is provided with a A return spring (608) is arranged, and a pressure block (609) is connected to the bottom of the transmission frame (607), and the pressure block (609) is conical, and the bottom of the pressure block (609) is slidably connected to a driving block (610), and a needle plate (611) is arranged on one side of the driving block (610), and the needle plate (611) is slidably connected to the filter cartridge (5), and a guide plate (612) is arranged on the lower end of one side of the needle plate (611), and the guide plate (612) is slidably connected to the filter cartridge (5).

2. The filtering device for a water purifier according to claim 1, characterized in that: An anti-blocking component (7) is arranged in the middle of the hanging cover (605), and the anti-blocking component (7) comprises a fan blade shaft (701), a central gear (702) and a planetary gear (703); the fan blade shaft (701) is arranged inside the water outlet pipe (3), and the fan blade shaft (701) is rotatably connected to the hanging cover (605); the central gear (702) is arranged at the lower end of the fan blade shaft (701), and the outer side of the central gear (702) is meshed with a planetary gear (703), and the planetary gear (703) is rotatably connected to the hanging cover (605).

3. The filtering device for a water purifier according to claim 2, characterized in that: The anti-blocking component (7) also includes a ring gear (704), a connecting plate (705) and a drive shaft (706); the ring gear (704) is meshed with one side of the planetary gear (703); the connecting plate (705) is fixed to the bottom of the ring gear (704); a drive shaft (706) is arranged at the center of the bottom of the connecting plate (705); the drive shaft (706) is rotatably connected to the hanging cover (605); the drive shaft (706) is slidably connected to the transmission frame (607); and the drive shaft (706) is rotatably connected to the filter cartridge (5).

4. The filtering device for a water purifier according to claim 3, characterized in that: The anti-blocking assembly (7) further comprises a guide groove (707), a transmission block (708) and a limit plate (709); a guide groove (707) is provided on the outer side of the middle part of the driving shaft (706); a transmission block (708) is slidably connected inside the guide groove (707); the transmission block (708) is fixedly connected to the pressing block (609), and a limit plate (709) is arranged at the bottom of the pressing block (609).

5. The filtering device for a water purifier according to claim 1, characterized in that: A shielding assembly (8) is arranged at the bottom of the filter cartridge (5), and the shielding assembly (8) comprises a fixed plate (801), a rotating plate (802) and a sliding column (803). The fixed plate (801) is arranged at the bottom of the filter cartridge (5), and the bottom of the fixed plate (801) is rotatably connected to the rotating plate (802), the rotating plate (802) is in an obtuse angle shape, and a sliding column (803) is fixed to one end of the rotating plate (802).

6. The filtering device for a water purifier according to claim 5, characterized in that: The shielding assembly (8) further comprises a connecting ear (804) and a lifting sleeve (805); the connecting ear (804) is sleeved on the outer side of the sliding column (803); the lifting sleeve (805) is fixed on one side of the connecting ear (804); and the inner diameter of the lifting sleeve (805) is greater than the inner diameter of the sewage pipe (4).

7. The filtering device for a water purifier according to claim 6, characterized in that: The shielding assembly (8) further comprises a sponge pad (806) and a blocking column (807); the sponge pad (806) is arranged at the bottom of the lifting sleeve (805); the blocking column (807) is slidably connected inside the lifting sleeve (805); and the blocking column (807) is fixedly connected to the filter cartridge (5).

8. The filtering device for a water purifier according to claim 7, characterized in that: The lower end of the shell (1) is provided with an anti-sticking component (9), and the anti-sticking component (9) includes a driving column (901), a limiting groove (902) and a limiting column (903); the bottom of the blocking column (807) is rotatably connected to the driving column (901), and the bottom of the driving column (901) is provided with a limiting groove (902), the limiting groove (902) is hexagonal, and the inside of the limiting groove (902) is slidably connected to the limiting column (903).

9. The filtering device for a water purifier according to claim 8, characterized in that: The anti-sticking component (9) further comprises an end cover (904), a handle (905) and a sealing ring (906); the end cover (904) is fixed to the bottom of the limiting column (903), and the end cover (904) is threadedly connected to the sewage pipe (4); the bottom of the end cover (904) is provided with a handle (905), and the inner bottom surface of the end cover (904) is provided with a sealing ring (906).

10. The filtering device for a water purifier according to claim 9, characterized in that: The anti-sticking component (9) also includes a first scraper (907) and a second scraper (908); the first scraper (907) is fixed to the outer side of the driving column (901), and the first scraper (907) is slidably connected to the sewage pipe (4); the top of the first scraper (907) is connected to the second scraper (908), and the second scraper (908) is inclined, and the second scraper (908) is slidably connected to the shell (1).

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