Filter with automatic cleaning function and water purifier

Abstract

The utility model discloses a filter and a water purifier with an automatic cleaning function, which comprise a shell, a filter element arranged in the shell, and a blow-off pipe assembly and a water inlet pipe assembly which are connected with the shell, a first cleaning pipe is arranged on the inner side of the filter element and / or a second cleaning pipe is arranged on the outer side of the filter element, a plurality of first jet holes are formed in the first cleaning pipe, and a plurality of second jet holes are formed in the second cleaning pipe. A plurality of second spraying holes are formed in the second cleaning pipe, and the first spraying holes and the second spraying holes communicate with the water inlet pipe assembly. Water can be sprayed to dirt which is attached to the surface of the filter element and intercepted through the water inlet pipe assembly, the first cleaning pipe and the first spraying holes in the first cleaning pipe, so that the purpose of automatically cleaning the filter element from the center to the periphery is achieved, and / or water is sprayed to dirt which is attached to the surface of the filter element and intercepted through the water inlet pipe assembly, the second cleaning pipe and the second spraying holes in the second cleaning pipe. Therefore, the purpose of automatically cleaning the filter element from the periphery to the center is achieved. The utility model is favorable for recovering design flow, is convenient to use, and does not need to be soaked and cleaned by medicaments or detached and brushed by manual scrubbing.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification equipment, in particular to a filter with an automatic cleaning function and a water purifier containing the filter. Background Art

[0002] With the continuous improvement of living standards, many consumers choose to use water purifiers to purify water. At present, using a hollow fiber membrane type water purifier with a high filtration accuracy to purify water is a very effective method. However, after using for a certain period of time, dirt will be intercepted and attached to the surface of the hollow fiber membrane filter element, resulting in a decrease in the filtered water flow rate. It is necessary to regularly clean and remove the intercepted dirt attached to the surface of the hollow fiber membrane filter element to restore the designed flow rate. The existing cleaning methods for the hollow fiber membrane filter element mainly include chemical agent immersion cleaning, backwashing, disassembly of the filter element for brushing or manual rubbing.

[0003] For the chemical agent immersion cleaning method, it has high professional requirements, and after chemical agent immersion cleaning, a large amount of clean water is required to thoroughly clean the residual chemical agents. Common chemical agents will also cause a certain degree of corrosion to the hollow fiber membrane filter element. Therefore, it has the defects of high professional requirements, waste of water resources and shortening of the designed service life.

[0004] For the backwashing cleaning method, there is a strict upper limit on the backwashing pressure. Exceeding the pressure limit will cause irreversible damage to the hollow fiber membrane filter element. Also, since the micropores of the hollow fiber membrane filter element are in a numerical range, such as 10 nanometers to 50 nanometers, during the actual backwashing process, due to the pressure relief of the larger pore diameter, the backwashing effect of the smaller pore diameter is not good. Therefore, it has the defect that a single backwashing cannot effectively meet the requirement of restoring the designed flow rate.

[0005] For the cleaning method of disassembly of the filter element for brushing or manual rubbing, since it is necessary to disassemble other components such as the water purifier housing and pipelines, it requires personnel with strong practical ability to operate, which also affects the user experience. Moreover, it is very difficult to control the mechanical strength properly during the brushing or manual rubbing process, which will cause deformation of the surface micropores of the hollow fiber membrane filter element or even damage to the filter element. It has the defects of complex operation and shortening of the designed service life. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a filter that can be automatically cleaned, is easy to use, is beneficial to restoring the designed flow rate, and avoids shortening the designed service life.

[0007] The utility model further provides a water purifier including the above filter.

[0008] To solve the above technical problems, the utility model adopts the following technical solutions:

[0009] A water purifier with an automatic cleaning function, comprising a housing, a filter element disposed inside the housing, and a sewage discharge pipe assembly and a water inlet pipe assembly connected to the housing. A first cleaning pipe is provided inside the filter element and / or a second cleaning pipe is provided outside the filter element. A plurality of first injection holes are provided on the first cleaning pipe, and a plurality of second injection holes are provided on the second cleaning pipe. Both the first injection holes and the second injection holes are communicated with the water inlet pipe assembly.

[0010] As a further improvement of the above technical solution: It further includes a driving mechanism for driving the first cleaning pipe and / or the second cleaning pipe to rotate.

[0011] As a further improvement of the above technical solution: One end of the first cleaning pipe is closed and the other end is butted with a passive magnetic rotating pipe. A first bearing seat is provided outside the passive magnetic rotating pipe. There is a gap between the first bearing seat and the inner wall of the sewage discharge pipe assembly. The driving mechanism includes an active magnetic driving seat provided outside the sewage discharge pipe assembly. A first magnetic member is provided on the passive magnetic rotating pipe, and a second magnetic member cooperating with the first magnetic member is provided on the active magnetic driving seat.

[0012] As a further improvement of the above technical solution: One end of the second cleaning pipe is connected to one end of the housing through a second bearing seat, and the other end of the second cleaning pipe is connected to the other end of the housing through a passive magnetic bearing seat. A third magnetic member is provided on the passive magnetic bearing seat, and a fourth magnetic member cooperating with the third magnetic member is provided on the active magnetic driving seat.

[0013] As a further improvement of the above technical solution: A rotating seat is provided between the passive magnetic rotating pipe and the first bearing seat, and the rotating seat extends to the outside of the first cleaning pipe.

[0014] As a further improvement of the above technical solution: A sealing ring is provided between the rotating seat and the first cleaning pipe, and sealing rings are also provided between the second cleaning pipe and the second bearing seat, and between the second cleaning pipe and the passive magnetic bearing seat; Mechanical seals are provided between the second bearing seat and the housing, and between the passive magnetic bearing seat and the housing.

[0015] As a further improvement of the above technical solution: The water inlet pipe assembly includes a first water inlet branch pipe, and the end of the first water inlet branch pipe penetrates through the sewage discharge pipe assembly and is butted with the first bearing seat.

[0016] As a further improvement of the above technical solution: The water inlet pipe assembly further includes a water inlet pipe and a second water inlet branch pipe. The water inlet pipe, the first water inlet branch pipe and the second water inlet branch pipe are connected through a three-way valve, and the second water inlet branch pipe is communicated with the housing.

[0017] As a further improvement of the above technical solution: a plurality of the first injection holes are spirally distributed, and a plurality of the second injection holes are spirally distributed.

[0018] As a further improvement of the above technical solution: the filter element is a hollow fiber membrane type filter element.

[0019] A water purifier includes the above filter with an automatic cleaning function.

[0020] Compared with the prior art, the advantages of the present utility model are as follows: for the filter with an automatic cleaning function disclosed by the present utility model, water can be sprayed through the water inlet pipe assembly, the first cleaning pipe and the first injection holes thereon onto the dirt intercepted on the surface of the filter element, so as to achieve the purpose of automatically cleaning the filter element from the center to the periphery; and / or, water is sprayed through the water inlet pipe assembly, the second cleaning pipe and the second injection holes thereon onto the dirt intercepted on the surface of the filter element, so as to achieve the purpose of automatically cleaning the filter element from the periphery to the center; the sewage generated during the cleaning process can be discharged from the sewage pipe assembly. The water purifier disclosed by the present utility model is beneficial to restoring the design flow rate, is convenient to use, and does not require soaking and cleaning with chemicals or disassembly, brushing, and manual rubbing.

[0021] The water purifier disclosed by the present utility model includes the above filter with an automatic cleaning function, and thus has the above advantages as well.

[0022] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the filter with an automatic cleaning function of the present utility model.

[0024] Figure 2 is Figure 1 a partial enlarged view of

[0025] Each label in the figure represents:

[0026] 1. Housing; 11. Water outlet pipe; 12. End cover; 2. Filter element; 3. Sewage pipe assembly; 31. Sewage pipe; 32. Sewage valve; 4. Water inlet pipe assembly; 41. First water inlet branch pipe; 42. Water inlet pipe; 43. Second water inlet branch pipe; 44. Three-way valve; 5. First cleaning pipe; 51. First injection hole; 52. Passive magnetic rotation pipe; 521. First magnetic part; 53. First bearing seat; 54. Rotating seat; 6. Second cleaning pipe; 61. Second injection hole; 62. Second bearing seat; 63. Passive magnetic bearing seat; 631. Third magnetic part; 7. Active magnetic drive seat; 71. Second magnetic part; 72. Fourth magnetic part; 81. Sealing ring; 82. Mechanical seal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0029] In the present utility model, unless otherwise clearly specified and defined, terms such as "assembly", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] The present utility model will be further described in detail below in conjunction with the specification drawings and specific embodiments.

[0031] Embodiment 1

[0032] Figures 1 to 2 An embodiment of the filter with an automatic cleaning function of the present utility model is shown. The water purifier with an automatic cleaning function in this embodiment includes a housing 1, a filter element 2 provided in the housing 1, a sewage discharge pipe assembly 3 and a water inlet pipe assembly 4 connected to the housing 1. A first cleaning pipe 5 is provided inside the filter element 2, and a second cleaning pipe 6 is provided outside the filter element 2. A plurality of first injection holes 51 are provided on the first cleaning pipe 5, and a plurality of second injection holes 61 are provided on the second cleaning pipe 6. Both the first injection holes 51 and the second injection holes 61 are communicated with the water inlet pipe assembly 4. Preferably, the filter element 2 is a hollow fiber membrane type filter element (or ultrafiltration membrane filter element), which has a good purification effect on water. Of course, in other embodiments, the filter element 2 can also be of other types; the sewage discharge pipe assembly 3 includes a sewage discharge pipe 31 communicated with the bottom of the housing 1 and a sewage discharge valve 32 for controlling the on-off of the sewage discharge pipe 31.

[0033] For the filter with an automatic cleaning function in this embodiment, water can be sprayed through the water inlet pipe assembly 4, the first cleaning pipe 5 and the first spraying holes 51 thereon onto the dirt intercepted on the surface of the filter element 2, so as to achieve the purpose of automatically cleaning the filter element 2 from the center to the periphery; or water can be sprayed through the water inlet pipe assembly 4, the second cleaning pipe 6 and the second spraying holes 61 thereon onto the dirt intercepted on the surface of the filter element 2, so as to achieve the purpose of automatically cleaning the filter element 2 from the periphery to the center; or the first cleaning pipe 5 and the second cleaning pipe 6 can be cleaned simultaneously. The sewage generated during the cleaning process can be discharged from the sewage discharge pipe assembly 3. The water purifier with an automatic cleaning function in this embodiment is beneficial to restoring the design flow rate, is convenient to use, and does not require soaking and cleaning with chemicals or disassembly, brushing, and manual scrubbing. Of course, in other embodiments, only the first cleaning pipe 5 or the second cleaning pipe 6 can be provided, but the cleaning effect is relatively poor.

[0034] Furthermore, in this embodiment, the filter with an automatic cleaning function further includes a driving mechanism for driving the first cleaning pipe 5 and the second cleaning pipe 6 to rotate. Through the rotational movement, the spraying water columns of the first spraying holes 51 and the second spraying holes 61 on the first cleaning pipe 5 and the second cleaning pipe 6 can spray onto the intercepted dirt attached to the surface of the filter element 2 without dead angles, ensuring a comprehensive cleaning range, and can also reduce the number of openings of the first cleaning pipe 5 and the second cleaning pipe 6 to ensure the spraying pressure, thereby ensuring the cleaning effect. Preferably, a plurality of first spraying holes 51 are distributed in a spiral shape, and a plurality of second spraying holes 61 are distributed in a spiral shape.

[0035] Even further, in this embodiment, one end of the first cleaning pipe 5 is closed and the other end is docked with a passive magnetic rotating pipe 52. A first bearing seat 53 is provided outside the passive magnetic rotating pipe 52. There is a gap between the first bearing seat 53 and the inner wall of the sewage discharge pipe assembly 3 (specifically, there is a gap between the first bearing seat 53 and the inner wall of the sewage discharge pipe 31, which is convenient for sewage to be discharged from the gap). The driving mechanism includes an active magnetic driving seat 7 provided outside the sewage discharge pipe assembly 3. A first magnetic member 521 is provided on the passive magnetic rotating pipe 52, and a second magnetic member 71 cooperating with the first magnetic member 521 is provided on the active magnetic driving seat 7. Among them, the first magnetic member 521 and the second magnetic member 71 can be permanent magnets, etc., as long as they can achieve the transmission of rotational power. When cleaning is required, the active magnetic driving seat 7 and the second magnetic member 71 thereon rotate, and the first magnetic member 521 rotates under the magnetic force of the second magnetic member 71 and drives the passive magnetic rotating pipe 52 to rotate, and the first cleaning pipe 5 rotates synchronously with the passive magnetic rotating pipe 52. Using magnetic drive to achieve rotation can reduce the complex mechanical transmission structure and reduce the volume of the water purifier. The passive magnetic rotating pipe 52 and the first bearing seat 53 are located inside the sewage discharge pipe 31 and do not occupy extra space, and the structure is compact and reasonable.

[0036] Furthermore, in this embodiment, one end of the second cleaning pipe 6 is connected to one end of the housing 1 (specifically, the end cover 12 on the upper part of the housing 1) through the second bearing seat 62, and the other end of the second cleaning pipe 6 is connected to the other end of the housing 1 through the passive magnetic bearing seat 63. A third magnetic member 631 is provided on the passive magnetic bearing seat 63, and a fourth magnetic member 72 that cooperates with the third magnetic member 631 is provided on the active magnetic drive seat 7. Among them, the third magnetic member 631 and the fourth magnetic member 72 can be permanent magnets, etc., as long as they can achieve the transmission of rotational power. When cleaning is required, the active magnetic drive seat 7 and the fourth magnetic member 72 thereon rotate, and the third magnetic member 631 rotates under the magnetic force of the fourth magnetic member 72 and drives the passive magnetic bearing seat 63 to rotate, and the second cleaning pipe 6 rotates synchronously with the passive magnetic bearing seat 63. Using magnetic drive to achieve rotation can reduce the complex mechanical transmission structure and reduce the volume of the filter. Moreover, the first cleaning pipe 5 and the second cleaning pipe 6 share the active magnetic drive seat 7, which can reduce the number of drive components, simplify the structure, and reduce the cost.

[0037] Furthermore, in this embodiment, a rotating seat 54 is provided between the passive magnetic rotating pipe 52 and the first bearing seat 53. The rotating seat 54 extends to the outside of the first cleaning pipe 5, or in other words, the docking between the first cleaning pipe 5 and the passive magnetic rotating pipe 52 is achieved through the rotating seat 54.

[0038] Furthermore, in this embodiment, a sealing ring 81 is provided between the rotating seat 54 and the first cleaning pipe 5, and sealing rings 81 are also provided between the second cleaning pipe 6 and the second bearing seat 62, and between the second cleaning pipe 6 and the passive magnetic bearing seat 63; mechanical seals 82 are provided between the second bearing seat 62 and the housing 1, and between the passive magnetic bearing seat 63 and the housing 1. By providing the sealing ring 81 and the mechanical seal 82, the sealing performance of the connection part can be ensured, leakage can be avoided, so that the water flow can flow along the set path, and the structure is simple and effective.

[0039] As a preferred embodiment, the water inlet pipe assembly 4 includes a first water inlet branch pipe 41. The end of the first water inlet branch pipe 41 penetrates through the sewage pipe assembly 3 and is docked with the first bearing seat 53. Water can sequentially pass through the first water inlet branch pipe 41, the passive magnetic rotating pipe 52, the first cleaning pipe 5, and the first injection hole 51 and be sprayed on the dirt intercepted on the surface of the filter element 2 to achieve the purpose of automatically cleaning the filter element 2 from the center to the periphery.

[0040] As a preferred embodiment, the water inlet pipe assembly 4 further includes a water inlet pipe 42 and a second water inlet branch pipe 43. The water inlet pipe 42, the first water inlet branch pipe 41, and the second water inlet branch pipe 43 are connected by a three-way valve 44. The three-way valve 44 can be used to control the on-off of the first water inlet branch pipe 41 and the second water inlet branch pipe 43. The second water inlet branch pipe 43 is communicated with the housing 1. Water can be sprayed onto the dirt intercepted on the surface of the filter element 2 through the second water inlet branch pipe 43 and the second spray holes 61 in sequence, so as to achieve the purpose of automatically cleaning the filter element 2 from the periphery to the center.

[0041] Preferably, both the three-way valve 44 and the sewage discharge valve 32 are electric valves, which are convenient for automatic control of on-off, further improving the automation degree of the filter and making it more convenient to use.

[0042] The water purifier with an automatic cleaning function of the present utility model has three working modes, which are specifically as follows:

[0043] 1) Cleaning from the periphery to the center: First, place the valve control rod of the three-way valve 44 in the closed position of the water inlet pipe 42, open the sewage discharge valve 32 to drain the water in the housing 1, and then place the valve control rod of the three-way valve 44 in the position where the water inlet pipe 42 and the second water inlet branch pipe 43 are communicated. Water flows from the upper-stage coarse filter through the water inlet pipe 42, through the three-way valve 44 and the second water inlet branch pipe 43, and after flowing through the cavity composed of the end cover 12, the housing 1, the second cleaning pipe 6, the second bearing seat 62 connected to the upper end, and the passive magnetic bearing seat 63 connected to the lower end, it is sprayed onto the dirt intercepted on the surface of the hollow fiber membrane filter element through a number of second spray holes 61 spirally extending axially along the radial direction on the wall of the second cleaning pipe 6. The sewage generated during the cleaning process flows through the sewage discharge pipe 31 and is discharged to the sewage main pipe through the sewage discharge valve 32;

[0044] At the same time, through the rotating active magnetic drive seat 7, the second cleaning pipe 6 connected to the passive magnetic bearing seat 63 and the second bearing seat 62 connected to the upper end are driven to rotate simultaneously, so that the sprayed water column is sprayed onto the intercepted dirt on the surface of the hollow fiber membrane filter element without dead angle due to the rotation of the second cleaning pipe 6, so as to achieve the purpose of cleaning the intercepted dirt on the surface of the hollow fiber membrane filter element from the periphery to the center.

[0045] 2) Cleaning from the center to the periphery:

[0046] First, place the valve control rod of the three-way valve 44 in the closed position of the water inlet pipe 42, open the drain valve 32 to drain the water in the housing 1, and then place the valve control rod of the three-way valve 44 in the position where the water inlet pipe 42 is connected to the first water inlet branch pipe 41. Water flows from the upper-stage coarse filter through the water inlet pipe 42, through the three-way valve 44, through the first water inlet branch pipe 41, through the passive magnetic rotating tube 52, through the first cleaning pipe 5, and through a number of first spray holes 51 radially wound and axially spirally extended on the wall of the first cleaning pipe 5, and is sprayed on the dirt intercepted on the surface of the hollow fiber membrane filter element. The sewage generated during the cleaning process flows through the sewage pipe 31 and is discharged to the sewage main pipe through the drain valve 32;

[0047] At the same time, the rotating active magnetic drive seat 7 drives the passive magnetic rotating tube 52, the rotating seat 54 installed on the first bearing seat 53 and the first cleaning pipe 5 to rotate, so that the sprayed water column is sprayed on the dirt intercepted on the surface of the hollow fiber membrane filter element without dead angle through the rotation of the first cleaning pipe 5, so as to achieve the purpose of cleaning the dirt intercepted on the surface of the hollow fiber membrane filter element from the center to the periphery.

[0048] 3) Daily use disturbance cleaning:

[0049] Water flows from the upper-stage coarse filter through the water inlet pipe 42, through the three-way valve 44 with the valve control rod placed in the position where the water inlet pipe 42, the second water inlet branch pipe 43 and the first water inlet branch pipe 41 are simultaneously connected, and flows out through the second cleaning pipe 6 and the first cleaning pipe 5 at the same time to meet the flow requirements during daily use. The purified water filtered by the hollow fiber membrane filter element is collected in the cavity of the end cover 12 and then enters the next-stage treatment or is used for daily use through the water outlet pipe 11;

[0050] At the same time, the water flowing out through the second cleaning pipe 6 and the first cleaning pipe 5 can disturb the dirt intercepted on the surface of the hollow fiber membrane filter element to a certain extent, so that the dirt is deposited in the bottom cavity of the sewage pipe 31 and is discharged into the sewage main pipe together during the next cleaning.

[0051] Embodiment 2

[0052] A water purifier includes the above-mentioned filter with an automatic cleaning function.

[0053] The water purifier of this embodiment includes the above-mentioned filter with an automatic cleaning function, so it also has the above-mentioned advantages.

[0054] Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present utility model by using the technical content disclosed above without departing from the scope of the technical solution of the present utility model, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall fall within the scope of protection of the technical solution of the present utility model.

Claims

1. A filter with an automatic cleaning function, comprising a housing (1), a filter element (2) disposed in the housing (1), and a sewage pipe assembly (3) and a water inlet pipe assembly (4) connected to the housing (1), characterized in that: A first cleaning pipe (5) is provided on the inner side of the filter element (2) and / or a second cleaning pipe (6) is provided on the outer side of the filter element (2); a plurality of first spray holes (51) are provided on the first cleaning pipe (5); a plurality of second spray holes (61) are provided on the second cleaning pipe (6); the first spray holes (51) and the second spray holes (61) are both connected to the water inlet pipe assembly (4).

2. The filter with automatic cleaning function according to claim 1, characterized in that: It also comprises a driving mechanism for driving the first cleaning pipe (5) and / or the second cleaning pipe (6) to rotate.

3. The filter with automatic cleaning function according to claim 2, characterized in that: One end of the first cleaning tube (5) is closed and the other end is connected to a passive magnetic rotating tube (52). A first bearing seat (53) is provided on the outside of the passive magnetic rotating tube (52). A gap is provided between the first bearing seat (53) and the inner wall of the sewage pipe assembly (3). The driving mechanism comprises an active magnetic driving seat (7) provided on the outside of the sewage pipe assembly (3). A first magnetic part (521) is provided on the passive magnetic rotating tube (52). A second magnetic part (71) cooperating with the first magnetic part (521) is provided on the active magnetic driving seat (7).

4. The filter with automatic cleaning function according to claim 3, characterized in that: One end of the second cleaning pipe (6) is connected to one end of the shell (1) via a second bearing seat (62), and the other end of the second cleaning pipe (6) is connected to the other end of the shell (1) via a passive magnetic bearing seat (63), a third magnetic component (631) is provided on the passive magnetic bearing seat (63), and a fourth magnetic component (72) that cooperates with the third magnetic component (631) is provided on the active magnetic drive seat (7).

5. The filter with automatic cleaning function according to claim 4, characterized in that: A rotating seat (54) is provided between the passive magnetic rotating tube (52) and the first bearing seat (53), and the rotating seat (54) extends to the outside of the first cleaning tube (5).

6. The filter with automatic cleaning function according to claim 5, characterized in that: A sealing ring (81) is provided between the rotating seat (54) and the first cleaning pipe (5), and a sealing ring (81) is also provided between the second cleaning pipe (6) and the second bearing seat (62), and between the second cleaning pipe (6) and the passive magnetic bearing seat (63); a mechanical seal (82) is provided between the second bearing seat (62) and the housing (1), and between the passive magnetic bearing seat (63) and the housing (1).

7. The filter with automatic cleaning function according to claim 3, characterized in that: The water inlet pipe assembly (4) comprises a first water inlet branch pipe (41), the end of the first water inlet branch pipe (41) passes through the sewage pipe assembly (3) and is butt-jointed with the first bearing seat (53).

8. The filter with automatic cleaning function according to claim 7, characterized in that: The water inlet pipe assembly (4) further comprises a water inlet pipe (42) and a second water inlet branch pipe (43); the water inlet pipe (42), the first water inlet branch pipe (41) and the second water inlet branch pipe (43) are connected via a three-way valve (44); and the second water inlet branch pipe (43) is in communication with the housing (1).

9. The filter with automatic cleaning function according to any one of claims 1 to 8, characterized in that: The plurality of first injection holes (51) are distributed in a spiral shape, and the plurality of second injection holes (61) are distributed in a spiral shape.

10. The filter with automatic cleaning function according to any one of claims 1 to 8, characterized in that: The filter element (2) is a hollow fiber membrane filter element.

11. A water purifier, characterized in that: A filter with automatic cleaning function comprising the filter according to any one of claims 1 to 10.

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