Water treatment device

Abstract

The utility model discloses a water treatment device. The left end of the shell is open, the right end of the shell is closed, a limiting step is arranged on the inner side of the left end of the shell, a first connector and a second connector are arranged on the top of the shell, a filtering assembly is arranged in the shell, the first connector is connected with a three-way connector, and the second connector is connected with a second connector. The second connector is connected with a water segregator, the three-way connector and the water segregator are connected through a one-way valve, the one-way valve is closed from left to right and communicated from right to left, and the upper end of the three-way connector is connected with a water valve switch. Through the cooperation of the water segregator, the one-way valve, the three-way connector and the filtering assembly, the three functions of closing, filtering and reverse backwashing can be manually achieved, meanwhile, the filtering material can be selected and replaced according to needs, the service life of equipment is prolonged, and the filter has the advantages of being ingenious in structure and durable.

Description

Technical Field

[0001] This utility model relates to a water treatment device, and more particularly to a water treatment device. Background Technology

[0002] Modern water purifiers, in addition to filtering water, can extend their lifespan if they can backwash the filter cartridges, allowing for reuse and timely discharge of backwashed wastewater. Furthermore, since tap water quality varies from place to place, the required filter materials also differ. If the filter can be selected according to different water quality needs, it will include the necessary filter materials, ensuring the quality of purified water. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a water treatment device that can effectively solve the problem of backwashing filter cartridges, allowing the filter cartridges to be reused, while discharging the backwashed wastewater and allowing for the selection of filter materials as needed. Through the cooperation of a water distributor, a one-way valve, a three-way connector and a filter assembly, the device can manually realize three functions: shut-off, filtration and backwashing. At the same time, filter materials can be selected and replaced as needed, extending the service life of the equipment. It has the characteristics of ingenious structure and durability.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a water treatment device, comprising a tubular outer shell and a sealing cap, and a clamp for fixing the two together, wherein the left end of the outer shell is open and the right end is closed, characterized in that: a limiting step is provided on the inner side of the left end of the outer shell, and a first connector and a second connector are provided on the top of the outer shell, wherein the first connector is located on the left side of the limiting step, and the second connector is located on the right end of the outer shell;

[0005] The housing contains a filter assembly located to the left of the limiting step. The filter assembly includes a fixing member, a connecting member, and several filter elements arranged from right to left. The filter assembly has an inlet channel inside and an outlet channel on its outer surface corresponding to the first connector.

[0006] The first connector is connected to a three-way connector, the second connector is connected to a water distributor, the three-way connector and the water distributor are connected by a one-way valve, the one-way valve is closed from left to right and open from right to left, and a water valve switch is connected to the upper end of the three-way connector;

[0007] In the closed state, the water distributor does not supply water; in the filtering state, the water valve is open, and water from the water distributor enters the housing through the second connector. After being purified by the filter assembly, clean water flows out through the outlet channel, the first connector, the three-way connector, and the water valve; in the backwashing state, the water valve is closed, and water from the water distributor enters the one-way valve, passes through the three-way connector, the first connector, and the outlet channel into the sealing cover, performing a reverse backwash on the filter assembly in the opposite direction to the filtration direction. The wastewater after backwashing returns to the water distributor through the second connector and is finally discharged from the drain connector of the water distributor.

[0008] Furthermore, the right end of the fixing member is provided with a radially extending first protrusion, the outer diameter of the first protrusion is larger than the inner diameter of the limiting step and smaller than the inner diameter of the outer shell, the outer circumferential surface of the first protrusion is provided with a first sealing groove, the left end of the fixing member is provided with a first step, and the right side wall of the connector is provided with a second step that cooperates with the first step.

[0009] The connector is provided with several filter tubes for purifying water, and several first water purification holes communicating with the filter tubes are provided on the left side wall of the connector; the right end of the connector is provided with a radially extending second convex edge, and the outer surface of the second convex edge is provided with a third convex edge, and the left and right sides of the third convex edge are provided with second sealing grooves; the second convex edge is provided with a water guide hole for passing through the entire outlet water; the left end of the connector is provided with a radially narrowing first connecting step, and the first connecting step is provided with a third sealing groove and several first locking blocks, the third sealing groove being located to the left of the first locking blocks;

[0010] The filter element has a radially narrowing second connecting step at its left end and several first latches that cooperate with the first latch at its right end. The second connecting step has a fourth sealing groove and several second latches. The fourth sealing groove is located on the left side of the second latches, and the second latches cooperate with the first latches. The second connecting step contains filter material for purifying water, and the left side wall of the second connecting step has several second water purification holes for water flow.

[0011] Furthermore, it also includes several sealing rings, which cooperate with the first sealing groove, the second sealing groove, the third sealing groove and the fourth sealing groove.

[0012] Furthermore, the outer shell and the sealing cover are each provided with a sealing flange that cooperates with the sealing ring at one end. The sealing flange corresponds to the second convex edge and cooperates with the clamp.

[0013] Further, the water distributor includes a base and, arranged from bottom to top within the base, a lower sealing gasket, a lower valve core, an upper valve core, a transmission component, an upper sealing gasket, and a pressure cap. The base has an upward-opening inner cavity, and a bottom plate is located below the inner cavity. A filter interface, running longitudinally through the bottom plate, is located at the center of the bottom plate. A first water inlet, a first drain outlet, and several first auxiliary ports are arranged clockwise on the outer side of the filter interface. The edges of the first water inlet, the first drain outlet, and the first auxiliary ports are all provided with upward-extending sealing protrusions, which cooperate with the lower sealing gasket. A backwash connector, a water inlet connector, and a drain connector are provided on the outer wall of the base. The backwash connector is located above the bottom plate. The inlet connector and the drain connector are flush with the base plate. The inlet connector is connected to the first inlet, and the drain connector is connected to the first drain outlet. The backwash connector is connected to the one-way valve, and the filter interface is connected to the second connector. The lower valve core has a first outlet that runs longitudinally through the lower valve core and corresponds to the filter interface at its center. The outer side of the first outlet has a second inlet, a second drain outlet, and several second auxiliary ports arranged clockwise, corresponding to the first inlet, the first drain outlet, and the first auxiliary port, respectively. The upper valve core has a water guide notch on its circumferential sidewall, and the bottom surface of the upper valve core has a closed surface and a central inlet groove and a water guide groove that are connected to each other.

[0014] The upper valve core has several second latches at its top, and the transmission component has several three-locking blocks at its bottom that cooperate with the second latches. The lower sealing gasket has a second outlet that runs longitudinally through it at its center. The outer side of the second outlet has a third inlet, a third drain, and several third auxiliary ports that correspond to the first inlet, the first drain, and the first auxiliary port, respectively. The clamping cover is threadedly sealed to the base, and an auxiliary gasket is provided above the clamping cover. The upper end of the transmission component has a connecting part, which passes through the clamping cover and the auxiliary gasket and is connected to a handle. The inner wall of the inner cavity has several longitudinally arranged positioning strips, and the circumferential side wall of the lower valve core has several positioning grooves that cooperate with the positioning strips.

[0015] Furthermore, the outer shell is also provided with several mutually cooperating support legs, the upper end of which hugs the outer shell and the lower end is used to support the balance of the outer shell.

[0016] Furthermore, an ultrafiltration membrane filter element is provided between the one-way valve and the water distributor. The ultrafiltration membrane filter element can provide clean water for backwashing, thus preventing unclean raw water from contaminating the filtration component.

[0017] This utility model adopts the above-mentioned technical solution, overcomes the shortcomings of the background technology, and provides a water treatment device that can effectively solve the problem of backwashing filter cartridges, allowing the filter cartridges to be reused, and at the same time discharge the backwashed wastewater. Through the cooperation of the water distributor, one-way valve, three-way connector and filter components, the three functions of shut-off, filtration and backwashing can be manually realized. At the same time, filter materials can be selected and replaced as needed to extend the service life of the equipment. It has the characteristics of ingenious structure and durability. Attached Figure Description

[0018] Appendix Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Appendix Figure 2 This is a cross-sectional structural diagram of the present invention in the filtering state.

[0020] Appendix Figure 3 This is a cross-sectional structural diagram of the present invention in the backwashing state.

[0021] Appendix Figure 4 This is a schematic diagram of the split structure of this utility model.

[0022] Appendix Figure 5 This is a schematic diagram of the split structure of the filter component in this utility model.

[0023] Appendix Figure 6 This is a schematic diagram of the split structure of the water distributor in this utility model.

[0024] Appendix Figure 7 This is a schematic diagram of the base structure in this utility model.

[0025] Appendix Figure 8 This is a schematic diagram of the structure of the lower sealing gasket in this utility model.

[0026] Appendix Figure 9 This is a schematic diagram of the lower valve core in this utility model.

[0027] Appendix Figure 10 This is a schematic diagram of the upper valve core in this utility model. Figure 1 .

[0028] Appendix Figure 11 This is a schematic diagram of the upper valve core in this utility model. Figure 2 .

[0029] In the diagram: Outer shell 1, sealing cap 101, limiting step 102, first connector 103, second connector 104, sealing flange 105, clamp 2, filter assembly 3, fixing component 301, first protruding edge 301a, first sealing groove 301b, first step 301c, connecting component 302, second step 302a, filter tube 302b, first water purification hole 302c, second protruding edge 302d, second sealing groove 302e, water guide hole 302f, etc. Components include: a connecting step 302g, a third sealing groove 302h, a first locking block 302i, a third protruding edge 302j, a filter element 303, a second connecting step 303a, a first locking slot 303b, a fourth sealing groove 303c, a second locking block 303d, a second water purification hole 303e, a water inlet channel 304, a water outlet channel 305, a sealing ring 306, a three-way connector 4, a water distributor 5, a base 501, an inner cavity 501a, a bottom plate 501b, and a filter interface 5. 01c, First water inlet 501d, First drain outlet 501e, First auxiliary outlet 501f, Sealing protrusion 501g, Backwash connector 501h, Water inlet connector 501i, Drain connector 501j, Positioning strip 501k, Lower sealing gasket 502, Second water outlet 502a, Third water inlet 502b, Third drain outlet 502c, Third auxiliary outlet 502d, Lower valve core 503, First water outlet 503a, Second water inlet 503b Second drain outlet 503c, second auxiliary outlet 503d, positioning groove 503e, upper valve core 504, water guide notch 504a, second bayonet 504b, sealing surface 504c, central water inlet groove 504d, water guide groove 504e, transmission component 505, third locking block 505a, connecting part 505b, upper sealing gasket 506, pressing cover 507, auxiliary gasket 508, handle 509, one-way valve 6, water valve switch 7, support leg 8, ultrafiltration membrane filter element 9. Detailed Implementation

[0030] The following descriptions of the embodiments are made with reference to the accompanying drawings, illustrating specific embodiments in which the present invention can be implemented. The directional terms used in this invention, such as up, down, front, back, left, right, inside, outside, side, etc., are merely for the purpose of referring to the accompanying drawings. Therefore, the directional terms used are for the purpose of explaining and understanding the present invention, and not for limiting the present invention. In the drawings, structurally similar units are indicated by the same reference numerals.

[0031] The following description, in conjunction with the accompanying drawings, further clarifies the specific embodiments of the present invention, making the technical solution and its beneficial effects clearer and more explicit.

[0032] See appendix Figures 1 to 11The present invention includes a tubular outer shell 1 and a sealing cap 101, and a clamp 2 for fixing the two together. The left end of the outer shell 1 is open and the right end is closed. The invention is characterized in that: a limiting step 102 is provided on the inner side of the left end of the outer shell 1, and a first connector 103 and a second connector 104 are provided on the top of the outer shell 1. The first connector 103 is located on the left side of the limiting step 102, and the second connector 104 is located on the right end of the outer shell 1.

[0033] The outer casing 1 is provided with a filter assembly 3, which is located on the left side of the limiting step 102. The filter assembly 3 includes a fixing member 301, a connecting member 302 and a plurality of filter elements 303 arranged from right to left. The filter assembly 3 is provided with an inlet channel 304 inside and an outlet channel 305 corresponding to the first connector 103 on its outer surface.

[0034] The first connector 103 is connected to a three-way connector 4, and the second connector 104 is connected to a water distributor 5. The three-way connector 4 and the water distributor 5 are connected by a one-way valve 6. The one-way valve 6 is closed from left to right and open from right to left. A water valve switch 7 is connected to the upper end of the three-way connector 4.

[0035] In the closed state, the water distributor 5 does not supply water; in the filtering state, the water valve switch 7 is open, and the water from the water distributor 5 enters the interior of the outer casing 1 through the second connector 104. After being purified by the filter assembly 3, the clean water flows out through the outlet channel 305, the first connector 103, the three-way connector 4, and the water valve switch 7; in the backwashing state, the water valve switch 7 is closed, and the water from the water distributor 5 enters the one-way valve 6, passes through the three-way connector 4, the first connector 103, and the outlet channel 305 into the sealing cover 101, performing a reverse backwash on the filter assembly 3 in the opposite direction to the filtering direction. The wastewater after backwashing returns to the water distributor 5 through the second connector 104 and is finally discharged from the drain connector 501j of the water distributor 5.

[0036] Furthermore, the right end of the fixing member 301 is provided with a radially extending first protrusion 301a. The outer diameter of the first protrusion 301a is larger than the inner diameter of the limiting step 102 and smaller than the inner diameter of the outer shell 1. A first sealing groove 301b is provided on the circumferential outer surface of the first protrusion 301a. The left end of the fixing member 301 is provided with a first step 301c. The right side wall of the connecting member 302 is provided with a second step 302a that cooperates with the first step 301c. The fixing member 301 and the connecting member 302 can be inserted, hot-melt welded, or ultrasonically welded.

[0037] The connector 302 is provided with a plurality of filter tubes 302b for purifying water. The left side wall of the connector 302 is provided with a plurality of first water purification holes 302c communicating with the filter tubes 302b. The right end of the connector 302 is provided with a radially extending second protruding edge 302d. The outer surface of the second protruding edge 302d is provided with a third protruding edge. The left and right sides of the third protruding edge are provided with second sealing grooves 302e. The second protruding edge 302d is provided with a water guide hole 302f for passing through the entire outlet water. The left end of the connector 302 is provided with a radially narrowing first connecting step 302g. The first connecting step 302g is provided with a third sealing groove 302h and a plurality of first locking blocks 302i. The third sealing groove 302h is located to the left of the first locking blocks 302i.

[0038] The filter element 303 has a radially narrowing second connecting step 303a at its left end and several first latches 303b at its right end that cooperate with the first latch block 302i. The second connecting step 303a has a fourth sealing groove 303c and several second latches 303d. The fourth sealing groove 303c is located to the left of the second latches 303d, and the second latches 303d cooperate with the first latches 303b. The second connecting step 303a contains filter material for purifying water (not shown in the figure), and the left side wall of the second connecting step 303a has several second water purification holes 303e for water flow.

[0039] Furthermore, it also includes a plurality of sealing rings 306, which cooperate with the first sealing groove 301b, the second sealing groove 302e, the third sealing groove 302h and the fourth sealing groove 303c.

[0040] Furthermore, the outer shell 1 and the sealing cover 101 are both provided with a sealing flange 105 that cooperates with the sealing ring 306 at one end of their contact. The sealing flange 105 corresponds to the second protruding edge 302d and cooperates with the clamp 2.

[0041] Further, the water distributor 5 includes a base 501 and, arranged from bottom to top within the base 501, a lower sealing gasket 502, a lower valve core 503, an upper valve core 504, a transmission component 505, an upper sealing gasket 506, and a pressure cap 507. The base 501 has an upward-opening inner cavity 501a, and a base plate 501b is located below the inner cavity 501a. A filter interface 501c, extending longitudinally through the base plate 501b, is located at the center of the base plate 501b. The filter interface 501c has a... The base 501 has a first water inlet 501d, a first drain outlet 501e, and several first auxiliary outlets 501f arranged clockwise. Each of the first water inlet 501d, the first drain outlet 501e, and the first auxiliary outlets 501f has an upwardly extending sealing protrusion 501g at its edge, which mates with the lower sealing gasket 502. The outer wall of the base 501 is provided with a backwash connector 501h, a water inlet connector 501i, and a drain connector 501j. The backwash connector 501h is located on the bottom plate 501b. Above, the water inlet connector 501i and the drain connector 501j are flush with the base plate 501b. The water inlet connector 501i is connected to the first water inlet 501d, and the drain connector 501j is connected to the first drain outlet 501e. The backwash connector 501h is connected to the one-way valve 6, and the filter interface 501c is connected to the second connector 104. The lower valve core 503 has a first filter interface 501c that runs longitudinally through the lower valve core 503 and corresponds to the filter interface 501c. The first outlet 503a has a water outlet 503a. On the outer side of the first water outlet 503a, there are second water inlets 503b, second sewage outlets 503c and several second auxiliary outlets 503d arranged clockwise, which correspond to the first water inlet 501d, the first sewage outlet 501e and the first auxiliary outlet 501f respectively. The upper valve core 504 has a water guiding notch 504a on its circumferential side wall. The bottom surface of the upper valve core 504 has a closed surface 504c and a central water inlet groove 504d and a water guiding groove 504e that are connected to each other.

[0042] The upper valve core 504 has several second latches 504b at its top, and the transmission component 505 has several third latches 505a at its bottom that cooperate with the second latches 504b; the lower sealing gasket 502 has a second outlet 502a that extends longitudinally through the lower sealing gasket 502 at its center, and the outer side of the second outlet 502a has a third inlet 502b, a third outlet 502c, and several other outlets corresponding to the first inlet 501d, the first drain 501e, and the first auxiliary outlet 501f, respectively. The third auxiliary port 502d is provided; the clamping cover 507 is threadedly sealed to the base 501, and an auxiliary pad 508 is provided above the clamping cover 507; the upper end of the transmission component 505 is provided with a connecting part 505b, and the connecting part 505b passes through the clamping cover 507 and the auxiliary pad 508 and is connected to a handle 509; the inner wall of the inner cavity 501a is provided with a plurality of longitudinally arranged positioning strips 501k, and the circumferential side wall of the lower valve core 503 is provided with a plurality of positioning grooves 503e that cooperate with the positioning strips 501k.

[0043] Furthermore, the outer shell 1 is also provided with a number of mutually cooperating support legs 8, the upper end of which hugs the outer shell 1 and the lower end is used to support the balance of the outer shell 1.

[0044] Furthermore, an ultrafiltration membrane filter element 9 is provided between the one-way valve 6 and the water distributor 5. This ultrafiltration membrane filter element 9 provides clean water for backwashing, preventing unclean raw water from contaminating the filter assembly 3. The raw water is first filtered through the ultrafiltration membrane filter element 9 to obtain relatively clean water. This clean water enters the outer casing 1 through the tee connector 4 and the outlet channel 305 to backwash the filter assembly 3. Wastewater is discharged from the drain connector 501j on the water distributor 5. The ultrafiltration membrane filter element 9 is replaceable, and the replacement conditions depend on the usage requirements. Backwashing primarily removes dirt from the outer wall of the filter tube 302b and the inner cavity on the right side of the upper limit step 102 of the outer casing 1. A large amount of dirt adhering to the outer wall of the filter tube 302b will affect its filtration effect. To maintain the backwash water pressure, a switch can be installed on the pipe connected to the upper end of the tee connector 4. During backwashing, this switch is closed, allowing all the backwash water to concentrate inside the outer casing 1.

[0045] In the closed state, the inlet connector 501i, the first inlet 501d, the second inlet 503b, and the sealing surface 504c are connected in sequence, and the water distributor 5 does not discharge water. In the filtered state, the inlet connector 501i, the first inlet 501d, the second inlet 503b, the water guide channel 504e, the central inlet channel 504d, the first outlet 503a, the filter interface 501c, the outer shell 1, the inlet channel 304 (including the first clean water hole 302c and the second clean water hole 303e), the outlet channel 305, the first connector 103, and the water valve switch 7 (in the filtered state, the water valve switch 7 is open). The components are connected in sequence; in the backwash state, the following components are connected in sequence: inlet connector 501i, first inlet 501d, second inlet 503b, water guide notch 504a, backwash connector 501h, one-way valve 6 (in the filtration state, water valve switch 7 is closed), outlet channel 305, inlet channel 304 (including first clean water hole 302c and second clean water hole 303e), outer shell 1, second connector 104 filter interface 501c, first outlet 503a, central inlet tank 504d, water guide tank 504e, second drain port 503c, first drain port 501e and drain connector 501j.

[0046] By coordinating the water valve switch 7 and the water distributor 5, the above-mentioned functions of shutting off, filtering, and backwashing can be switched to meet the usage requirements.

[0047] The outer casing 1 and the sealing cover 101 are connected by clamps 2. By unscrewing clamps 2, the sealing cover 101 can be removed, allowing the filter element 303 inside the casing to be taken out. By placing different filter media for water purification inside different filter elements 303, filter elements 303 with different built-in filter media can be selected according to needs. These filter elements 303 are then connected by clips, and purified water that meets the required standards can be obtained through this filter. After a certain period of use, the filter elements 303 can be replaced as needed, or the filter media inside the filter elements 303 can be made easily accessible for direct replacement.

[0048] The filter tube 302b is made of ultra-fine pore material. It performs the first filtration of the raw water sent in by the water distributor 5. Impurities and viruses in the raw water will be filtered out and adhere to the outer wall of the filter tube 302b or remain inside the outer shell 1. The clean water after the first filtration flows out from the first clean water hole 302c. After multiple filtrations in the subsequent filter element 303, the clean water that meets the requirements finally flows out from the three-way connector 4.

[0049] The filter element 303 and the connector 302 can be snapped together. At the same time, the filter elements 303 can also be snapped together end to end. By stacking and combining multiple filter elements 303 with different filter materials, different filtration requirements can be effectively met.

[0050] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions made using techniques known in the art based on this utility model all fall within the protection scope of this utility model and should be defined by the claims.

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] In the description of this specification, the use of terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refers to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A water treatment device, comprising a tubular outer shell and a sealing cap, and a clamp for fixing the two together, wherein the left end of the outer shell is open and the right end is closed, characterized in that: The inner side of the left end of the outer shell is provided with a limiting step, and the top of the outer shell is provided with a first connector and a second connector. The first connector is located to the left of the limiting step, and the second connector is located at the right end of the outer shell. The housing contains a filter assembly located to the left of the limiting step. The filter assembly includes a fixing member, a connecting member, and several filter elements arranged from right to left. The filter assembly has an inlet channel inside and an outlet channel on its outer surface corresponding to the first connector. The first connector is connected to a three-way connector, the second connector is connected to a water distributor, the three-way connector and the water distributor are connected by a one-way valve, the one-way valve is closed from left to right and open from right to left, and a water valve switch is connected to the upper end of the three-way connector; In the closed state, the water distributor does not supply water; in the filtering state, the water valve is open, and water from the water distributor enters the housing through the second connector. After being purified by the filter assembly, clean water flows out through the outlet channel, the first connector, the three-way connector, and the water valve; in the backwashing state, the water valve is closed, and water from the water distributor enters the one-way valve, passes through the three-way connector, the first connector, and the outlet channel into the sealing cover, performing a reverse backwash on the filter assembly in the opposite direction to the filtration direction. The wastewater after backwashing returns to the water distributor through the second connector and is finally discharged from the drain connector of the water distributor.

2. The water treatment device according to claim 1, characterized in that: The right end of the fastener is provided with a radially extending first protrusion. The outer diameter of the first protrusion is larger than the inner diameter of the limiting step and smaller than the inner diameter of the outer shell. A first sealing groove is provided on the outer circumferential surface of the first protrusion. The left end of the fastener is provided with a first step. The right side wall of the connector is provided with a second step that cooperates with the first step. The connector is provided with several filter tubes for purifying water, and several first water purification holes communicating with the filter tubes are provided on the left side wall of the connector; the right end of the connector is provided with a radially extending second convex edge, and the outer surface of the second convex edge is provided with a third convex edge, and the left and right sides of the third convex edge are provided with second sealing grooves; the second convex edge is provided with a water guide hole for passing through the entire outlet water; the left end of the connector is provided with a radially narrowing first connecting step, and the first connecting step is provided with a third sealing groove and several first locking blocks, the third sealing groove being located to the left of the first locking blocks; The filter element has a radially narrowing second connecting step at its left end and several first latches that cooperate with the first latch at its right end. The second connecting step has a fourth sealing groove and several second latches. The fourth sealing groove is located on the left side of the second latches, and the second latches cooperate with the first latches. The second connecting step contains filter material for purifying water, and the left side wall of the second connecting step has several second water purification holes for water flow.

3. The water treatment device according to claim 2, characterized in that: It also includes several sealing rings, which cooperate with the first sealing groove, the second sealing groove, the third sealing groove and the fourth sealing groove.

4. A water treatment device according to claim 3, characterized in that: The outer shell and the sealing cover are both provided with a sealing flange that mates with the sealing ring at one end. The sealing flange corresponds to the second convex edge and mates with the clamp.

5. A water treatment device according to claim 1, characterized in that: The water distributor includes a base and, arranged from bottom to top within the base, a lower sealing gasket, a lower valve core, an upper valve core, a transmission component, an upper sealing gasket, and a pressure cap. The base has an upward-opening inner cavity, and a base plate is located below the inner cavity. A filter interface, running longitudinally through the base plate, is located at the center of the base plate. Outside the filter interface, a first water inlet, a first drain outlet, and several first auxiliary outlets are arranged clockwise. Each of the first water inlet, the first drain outlet, and the first auxiliary outlets has an upward-extending sealing protrusion at its edge, which mates with the lower sealing gasket. A backwash connector, a water inlet connector, and a drain connector are located on the outer wall of the base. The backwash connector is located above the base plate. The connector and the drain connector are flush with the base plate. The water inlet connector is connected to the first water inlet, and the drain connector is connected to the first drain outlet. The backwash connector is connected to the one-way valve, and the filter interface is connected to the second connector. The lower valve core has a first water outlet that runs longitudinally through the lower valve core and corresponds to the filter interface at its center. The outer side of the first water outlet has a second water inlet, a second drain outlet, and several second auxiliary ports arranged clockwise, corresponding to the first water inlet, the first drain outlet, and the first auxiliary port, respectively. The upper valve core has a water guiding notch on its circumferential sidewall, and the bottom surface of the upper valve core has a closed surface and a central water inlet groove and a water guiding groove that are connected to each other. The upper valve core has several second latches at its top, and the transmission component has several third latches at its bottom that cooperate with the second latches. The lower sealing gasket has a second outlet that runs longitudinally through it at its center. The outer side of the second outlet has a third inlet, a third drain, and several third auxiliary ports that correspond to the first inlet, the first drain, and the first auxiliary port, respectively. The clamping cover is threadedly sealed to the base, and an auxiliary gasket is provided above the clamping cover. The upper end of the transmission component has a connecting part, which passes through the clamping cover and the auxiliary gasket and is connected to a handle. The inner wall of the inner cavity has several longitudinally arranged positioning strips, and the circumferential side wall of the lower valve core has several positioning grooves that cooperate with the positioning strips.

6. A water treatment device according to claim 1, characterized in that: The outer shell is also provided with several interlocking feet, the upper end of which hugs the outer shell and the lower end of which supports the balance of the outer shell.

7. A water treatment device according to claim 1, characterized in that: An ultrafiltration membrane filter element is provided between the one-way valve and the water distributor. The ultrafiltration membrane filter element can provide clean water for backwashing, avoiding contamination of the filter component by unclean raw water.

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