Pre-filter and water system

Abstract

The invention discloses a pre-filter and a water system, and relates to the technical field of filters, the pre-filter comprises a valve head, a filter bottle, a filter assembly, a reversing part and a driving part, a water filtering cavity is formed in the filter bottle, the valve head is provided with a water inlet and a water outlet which are communicated with the water filtering cavity, one side, away from the valve head, of the filter bottle is provided with a drain outlet, and the reversing part is hollow; the inner peripheral side of the reversing part is communicated with the water outlet and the water filtering cavity, the reversing part comprises a communicating part and a blocking part, the reversing part is movably inserted into the filtering assembly, so that the prefilter can be switched between a filtering mode and a flushing mode, and a flushing flow path between the water inlet and the reversing part is communicated through the communicating part and is cut off through the blocking part; the driving part is in driving connection with the reversing part and is exposed out of the front filter. According to the technical scheme, the filtering effect of the filtering assembly is guaranteed, and the service life of the pre-filter is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of filters, in particular to a pre-filter and a water use system. Background Art

[0002] As people's living standards continue to improve, the requirements for daily water use are also getting higher and higher. Due to long-term disrepair and aging of the tap water pipes, there are a large number of large particles in the water that are harmful to the human body, such as mud, rust, and red worms, which seriously affect the health of residents' water use. Therefore, a pre-filter is set up, and a filter component and other structures are provided inside the pre-filter, which can filter large particles before the tap water is used at the faucet. However, while the pre-filter is filtering the water, impurities will adhere to the filter cavity, especially the surface of the filter component, which will clog the filter component over time and reduce the filtering effect of the filter component. Summary of the invention

[0003] The main purpose of the present invention is to provide a pre-filter and a water-using system, aiming to ensure the filtering effect of the filtering component and to increase the service life of the pre-filter.

[0004] To achieve the above object, the pre-filter proposed by the present invention comprises:

[0005] A valve head and a filter bottle, wherein the filter bottle is formed with a water filter cavity, the valve head is provided with a water inlet and a water outlet connected to the water filter cavity, and a sewage outlet is provided on a side of the filter bottle away from the valve head;

[0006] A filter assembly is disposed in the water filter cavity;

[0007] a switching member, wherein the switching member is hollow, the inner circumference of the switching member is connected to the water outlet and the water filter chamber, the switching member comprises a connecting portion and a blocking portion, the switching member can be movably inserted into the filter assembly so that the pre-filter can switch between a filtering mode and a flushing mode, and the flushing flow path between the water inlet and the switching member is connected through the connecting portion and cut off through the blocking portion; and

[0008] A driving member is drivingly connected to the switching member and exposed on the outside of the pre-filter.

[0009] In one embodiment, the valve head is provided with a water isolating ring between the water inlet and the water outlet, the water inlet is connected to the outer peripheral side of the water isolating ring, the water outlet is connected to the inner peripheral side of the water isolating ring, and the reversing member is axially movably inserted in the water isolating ring and the filter assembly.

[0010] In one embodiment, the filter assembly includes a water distributor and a filter module connected along the axial direction, a water flow chamber is formed inside the filter module, and the filter module also forms a first water flow port and a second water flow port connected to the water flow chamber, the filter module includes a filter element, and the filter element is arranged at the second water flow port, the water distributor has a first water flow space corresponding to the first water flow port and a second water flow space corresponding to the second water flow port, a guide blade is arranged in the second water flow space, and the switching element extends into the water flow chamber through the first water flow space.

[0011] In one embodiment, the reversing member also includes a hollow pipe section, the connecting portion, the blocking portion and the hollow pipe section are distributed in sequence along the axial direction, the connecting portion is plug-fitted with the water blocking ring, the blocking portion is plug-fitted with the water distributor, and the hollow pipe section extends into the water passage chamber.

[0012] In one embodiment, the driving member includes a driving screw, one of the valve head and the reversing member is rotatably connected to the driving screw and axially fixed, and the other of the valve head and the reversing member is threadedly connected to the driving screw via a screw connection structure.

[0013] In one embodiment, the threaded structure is configured as a mounting bracket fixedly disposed in the reversing member, the driving screw is threadedly connected to the mounting bracket, and is rotatably connected to the valve head and fixed in the axial direction.

[0014] In one embodiment, the mounting bracket includes an inner ring portion and an outer ring portion connected to each other, the driving screw is screwed to the inner ring portion, and the outer ring portion is snap-connected to the reversing member.

[0015] In one embodiment, the outer ring portion is connected to a plurality of connecting arms extending in the axial direction, the plurality of connecting arms are distributed at intervals in the circumferential direction, the connecting arms are snap-connected to the switching member, the inner ring portion is arranged opposite to the connecting arms, and is connected to the plurality of connecting arms one by one through a plurality of connecting ribs distributed in the circumferential direction.

[0016] In one embodiment, the driving member further includes a driving knob, which is fixed to the driving screw and located outside the valve head.

[0017] In one embodiment, the driving knob is rotatably connected to the valve head and is relatively fixed to the valve head in the axial direction.

[0018] In one embodiment, the pre-filter also includes a movable part fixedly connected to the reversing part, the water inlet and the water outlet are arranged on one side of the movable part, the sewage outlet is arranged on the other side of the movable part, and the spaces on the opposite sides of the movable part are separated in the filtering mode and connected in the flushing mode.

[0019] In one embodiment, the filter assembly includes a plurality of filter modules, a water flow cavity is formed inside the filter module, the filter module is formed with a first water flow port and a second water flow port connected to the water flow cavity, the second water flow port is provided with a filter element, the filter element is arranged in a ring shape, and has an inner ring edge and an outer ring edge, and the outer ring edge is located on one axial side of the inner ring edge, and the plurality of filter modules are connected in sequence along the axial direction.

[0020] In one embodiment, the filter module includes two support frames distributed along the axial direction, the water passage cavity is formed between the two support frames, each support frame is provided with the filter element, and the inner ring edge and the outer ring edge of two adjacent filter elements are distributed in opposite directions.

[0021] In one embodiment, the supporting skeleton includes an oblique supporting portion, the two ends of the oblique supporting portion are respectively connected to a first ring portion and a second ring portion, the two oblique supporting portions of the same filter module are connected through the second ring portion, the first water outlet is provided on the inner periphery of the first ring portion, and the second water outlet is provided on the oblique supporting portion.

[0022] In one embodiment, the oblique support portion is formed with a plurality of the second water outlets distributed at intervals, and the filter module is provided with a filter element corresponding to each of the support frames, and the filter element is stacked on the surface of the oblique support portion.

[0023] In one embodiment, each of the supporting frames is provided with the second ring portion, the two second ring portions of the same filter module are detachably connected, and the first ring portions of two adjacent filter modules are detachably connected.

[0024] In one embodiment, the pre-filter further comprises an exoskeleton, which is rotatably mounted outside the filter assembly, and a cleaning brush is disposed on the inner periphery of the exoskeleton, and the cleaning brush is tilted toward the filter element.

[0025] In one embodiment, the pre-filter further comprises an exoskeleton, the exoskeleton is rotatably mounted outside the filter assembly, the exoskeleton comprises a side frame and a chassis, the chassis is connected to the side of the side frame away from the valve head.

[0026] In one embodiment, the outer frame forms a siphon channel, the side frame is provided with a siphon hole connected to the siphon channel, the chassis is provided with a first discharge port connected to the siphon channel, and the first discharge port is connected to the sewage outlet at least in the flushing mode.

[0027] In one embodiment, an impeller assembly is also provided in the water filter chamber, and the impeller assembly includes a mounting seat and an impeller body rotatably mounted on the mounting seat, the impeller body is coaxially connected to the exoskeleton and fixed in the circumferential direction, and the mounting seat is formed with a first water inlet and a drain that are connected to each other, the first water inlet is connected to the first discharge port, and the drain port is connected to the sewage outlet at least in the flushing mode.

[0028] In one embodiment, the mounting seat is further provided with a second water inlet, wherein the first water inlet is provided on one axial side of the mounting seat, and the second water inlet is provided on a circumferential side of the mounting seat;

[0029] The chassis is also provided with a second discharge port extending axially therethrough, and a water retaining structure is formed on opposite sides of the exoskeleton and the mounting seat. The water retaining structure is arranged around the first discharge port, and the second discharge port is located at the periphery of the water retaining structure. The second water inlet is connected to the second discharge port.

[0030] In one embodiment, the side frame is provided with a water flow driving member, and the water flow driving member has a driving surface, and the driving surface is arranged at an angle relative to the circumference of the outer frame, so that the driving surface can drive the outer frame to rotate after being impacted by the water flow.

[0031] In one embodiment, the water flow driving component includes a hanging portion and a driving body, the hanging portion is hung on the end of the side frame, the driving body is arranged in a conformal manner with the inner circumferential wall of the side frame, the driving body extends in a circumferential arc along the side frame, and has a plurality of water baffles distributed at intervals, and the driving surface is formed on the water baffles.

[0032] The present invention also provides a water use system, comprising the aforementioned pre-filter.

[0033] In the technical solution of the present invention, the pre-filter is a backwash filter. In the flushing mode and the filtering mode, the flow direction of water flowing through the filter assembly is opposite, and the water flow direction is switched by the reversing member. The driving member is exposed on the outside of the pre-filter for the user to act on. The user acts on the driving member to drive the reversing member to switch between two positions corresponding to the filtering mode and the flushing mode. This solution can change the connectivity between different structures through the movement of the reversing member, thereby changing the flow direction of the raw water entering the water inlet and the water flow path in the filter chamber, thereby switching the pre-filter between the filtering mode and the flushing mode, and realizing the self-flushing of the internal filtering assembly of the pre-filter, thereby eliminating the need for manual disassembly and cleaning, facilitating the cleaning of the pre-filter, and thereby increasing the service life of the pre-filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of the external structure of an embodiment of a pre-filter provided by the present invention;

[0036] Figure 2 A schematic cross-sectional structure diagram of an embodiment of the pre-filter provided by the present invention in filtering mode;

[0037] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0038] Figure 4 for Figure 2 A partial enlarged view of point B in the middle;

[0039] Figure 5 for Figure 2 A partial enlarged view of point C in the middle;

[0040] Figure 6 for Figure 3 Schematic diagram of the state of the corresponding local structure in the flushing mode;

[0041] Figure 7 for Figure 4 Schematic diagram of the state of the corresponding local structure in the flushing mode;

[0042] Figure 8 A schematic structural diagram of a partial structure of an embodiment of a pre-filter provided by the present invention;

[0043] Fig. 9 A schematic structural diagram of another partial structure of an embodiment of a pre-filter provided by the present invention;

[0044] Fig.10 A schematic diagram of the external structure of an embodiment of a filter assembly of a pre-filter provided by the present invention;

[0045] Fig.11 A schematic diagram of the connection structure of two filter modules of an embodiment of the pre-filter provided by the present invention;

[0046] Fig.12 A schematic diagram of the connection structure of two filter modules of another embodiment of the pre-filter provided by the present invention;

[0047] Fig.13 A schematic diagram of an exploded structure of an embodiment of a filter module of a pre-filter provided by the present invention;

[0048] Fig.14 A partial structural cross-sectional view of an embodiment of a pre-filter provided by the present invention;

[0049] Fig.15 A schematic structural diagram of an impeller assembly of an embodiment of a pre-filter provided by the present invention;

[0050] Fig.16 for Fig.15 A schematic diagram of the structure of the impeller assembly from another perspective;

[0051] Fig.17 for Fig.15 A schematic structural diagram of an impeller body of an impeller assembly according to an embodiment of the present invention;

[0052] Fig.18 A schematic structural diagram of an embodiment of an exoskeleton of a pre-filter provided by the present invention;

[0053] Fig.19 for Fig.18 Schematic diagram of the structure of the exoskeleton from another perspective.

[0054] Description of Figure Numbers:

[0055] 10, filter bottle; 101, water filter chamber; 102, sewage outlet; 140, sewage channel; 141, first channel; 142, second channel;

[0056] 20. Valve head; 201. Water inlet; 202. Water outlet; 203. Water isolation ring; 22. Metal outer shell; 23. Plastic lining;

[0057] 30. Filter assembly; 300. Filter module; 301. First connection structure; 302. Second connection structure;

[0058] 310, supporting frame; 311, oblique supporting portion; 312, first ring portion; 313, second ring portion;

[0059] 320, filter element;

[0060] 330, first water outlet; 340, water passage cavity; 350, second water outlet;

[0061] 40. Impeller assembly;

[0062] 410, mounting seat; 402, first water inlet; 403, second water inlet; 404, drain outlet; 424, water retaining ring;

[0063] 440, impeller body; 441, impeller shaft; 442, impeller blades; 443, second protrusion;

[0064] 50. Exoskeleton;

[0065] 501, siphon flow channel; 503, first discharge port; 504, second discharge port;

[0066] 511, chassis; 512, side frame; 513, first protrusion; 514, water retaining ring; 531, siphon hole;

[0067] 540, water flow driving member; 541, hanging part; 542, driving body; 543, water baffle; 544, driving surface;

[0068] 60. water distributor; 610. first water passage space; 620. second water passage space; 621. guide vane;

[0069] 720, reversing member; 721, connecting portion; 722, baffle portion; 7221, annular main body; 7222, baffle skirt; 723, hollow pipe section;

[0070] 730, movable part; 731, blocking part; 732, connecting part; 733, avoiding part;

[0071] 740, mounting bracket; 741, inner ring; 742, outer ring; 743, connecting arm; 744, clamping protrusion; 745, connecting rib;

[0072] 800, driving member; 810, driving screw; 820, driving knob;

[0073] 90. Cleaning structure; 1001. Fastener; 1002. Sealing ring.

[0074] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0075] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0076] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0077] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0078] Water use systems, such as whole-house water purification systems, are usually equipped with pre-filters, which are used to filter large particles of tap water. This not only ensures the safety of residents' water use, but also extends the service life of home appliances, prevents blockage of household water pipes, and improves the health of residents. The pre-filter is the first coarse filtration device in the whole-house water purification system. It is a physical filtration device used to protect the safety of back-end water use.

[0079] The present invention proposes a pre-filter, which has a filtering mode and a flushing mode. In the filtering mode, the pre-filter can filter large particles before using the water end. In the flushing mode, the pre-filter can clean the filtering components inside it to discharge the large particles previously intercepted, thereby eliminating the need to manually disassemble and clean the pre-filter, thereby increasing the service life of the pre-filter.

[0080] See also Figure 1 and Figure 2In one embodiment of the present invention, the pre-filter includes a valve head 20 and a filter bottle 10, the filter bottle 10 is formed with a water filter chamber 101, the valve head 20 is provided with a water inlet 201 and a water outlet 202 connected to the water filter chamber 101, and the filter bottle 10 is provided with a sewage outlet 102 on the side away from the valve head 20.

[0081] The water inlet 201 is connected to the water supply end of the water use system, and the water outlet 202 is connected to the water use end of the water use system, thereby filtering the raw water flowing from the water supply end to the water use end. It should be noted that the water supply end can be a water pipe, a water tower or a well water, and the water use end can be a faucet, a shower or a drinking water outlet, and this application does not make specific limitations on this.

[0082] The connection between the valve head 20 and the filter bottle 10 can be threaded, for example, the valve head 20 is provided with an external threaded tube, and the bottle mouth of the filter bottle 10 is provided with an internal thread for threading the external threaded tube. In order to reduce the production difficulty of the pre-filter and the inspection requirements of the assembly results, and reduce the material cost of the valve head 20, in this embodiment, the filter bottle 10 and the valve head 20 are connected by a fastener 10011.

[0083] The valve head 20 includes a metal shell 22 and a plastic lining 23 connected to each other, and the water inlet 201 and the water outlet 202 are both formed on the plastic lining 23. In this way, the water flowing through the pre-filter directly contacts the plastic lining 23 instead of the metal shell 22, which can avoid the problem of water being contaminated by metal elements precipitated from the metal shell 22, and can also make the pre-filter have good aesthetics and shell strength. In other embodiments, the valve head 20 can also be directly configured as a metal part.

[0084] The materials of the metal shell portion 22 and the plastic lining portion 23 are not specifically limited in this application. For example, the material of the metal shell portion 22 can be a copper alloy, such as brass, and the material of the plastic lining portion 23 can be PP (polypropylene) or PVC (polyvinyl chloride).

[0085] The pre-filter also includes a filter assembly 30 disposed in the water filter chamber 101. After the raw water (such as tap water or well water) flows into the water inlet 201 from the external water source, it can flow through the filter assembly 30 for filtration. The filter assembly 30 can intercept large particles of impurities in the water and remove some precipitated impurities, rust, sand, mud, bacteria and other particulate impurities generated in the pipeline, and play a good protective function for water purifiers, washing machines, showers, high-end faucets, downstream pipelines, etc., reducing the risk of damage to these devices due to clogging by impurities. The form and structure of the filter assembly 30 are not limited. The filter assembly 30 can be equipped with a stainless steel filter or a PP cotton filter to filter impurities.

[0086] The pre-filter is usually a "T"-shaped structure. The "horizontal" position on the top corresponds to the valve head 20, and the left and right ends are the water inlet 201 and the water outlet 202 respectively. The main body of the "vertical" position on the bottom is the filter bottle 10, and the sewage outlet 102 is located on the lower side of the filter bottle 10.

[0087] Please refer to Figures 2 to 9 The pre-filter also includes a driving member 800 and a reversing member 720. The driving member 800 is drivingly connected to the reversing member 720 and is exposed on the outside of the pre-filter. The reversing member 720 is hollow. The inner peripheral side of the reversing member 720 is connected to the water outlet 202 and the water filter chamber 101. The reversing member 720 includes a connecting portion 721 and a blocking portion 722. The reversing member 720 can be movably inserted into the filter assembly 30 so that the pre-filter can switch between a filtering mode and a flushing mode. The flushing flow path between the water inlet 201 and the reversing member 720 is connected through the connecting portion 721 and is cut off through the blocking portion 722.

[0088] In the technical solution of the present invention, the pre-filter is a backwash filter. In the flushing mode and the filtering mode, the flow direction of water flowing through the filter assembly 30 is opposite, and the flow direction of water is switched by the reversing member 720. The driving member 800 is exposed on the outside of the pre-filter for the user to act on. The user acts on the driving member 800 to drive the reversing member 720 to switch between the two positions corresponding to the filtering mode and the flushing mode.

[0089] Please also read Figure 2 and Figure 3 When the reversing member 720 is driven to a position corresponding to the filtering mode, the position of the blocking portion 722 can avoid the filtering flow path between the water inlet 201 and the water filter cavity 101 on the periphery of the filter assembly 30, so that the filtering flow path from the water inlet 201 to the water filter cavity 101 on the periphery of the filter assembly 30 is connected, and the flushing flow path between the water inlet 201 and the inner circumference of the reversing member 720 is cut off. At this time, since the sewage outlet 102 is closed and the water outlet 202 is opened, after the raw water enters the water filter cavity 101 from the water inlet 201, it can flow from the outside to the inside along the radial direction of the filter assembly 30, thereby filtering the raw water, and the filtered water flows to the water outlet 202 through the inner circumference of the reversing member 720.

[0090] Please also read Figure 2 and Figure 6When the reversing member 720 is driven to the position corresponding to the flushing mode, the position of the blocking portion 722 can cut off the filtering flow path between the water inlet 201 and the water filter chamber 101 on the outer periphery of the filter assembly 30, and the position of the connecting portion 721 can allow the water inlet 201 to connect to the inner periphery of the reversing member 720, so as to conduct the flushing flow path from the water inlet 201 to the water filter chamber 101 via the inner periphery of the reversing member 720. At this time, since the sewage outlet 102 is opened and the water outlet 202 is closed, the raw water enters from the water inlet 201, enters the inner periphery of the reversing member 720 via the connecting portion 721, and then flows to the filter assembly 30 to flush the filter assembly 30, and finally is discharged from the sewage outlet 102.

[0091] In summary, the present solution can change the connectivity between different structures through the movement of the reversing member 720, thereby changing the flow direction of the raw water entering the water inlet 201 and the water flow path in the water filter chamber 101, thereby enabling the pre-filter to switch between the filtering mode and the flushing mode, and achieving self-flushing of the internal filter assembly 30 of the pre-filter, thereby eliminating the need for manual disassembly and cleaning, facilitating the cleaning of the pre-filter, and thereby increasing the service life of the pre-filter.

[0092] Among them, the connecting part 721 and the blocking part 722 are integrally formed on the switching part 720, which not only facilitates the assembly of the switching part 720, but also ensures the overall strength of the switching part 720, and avoids the possibility of an installation gap between the connecting part 721 and the blocking part 722, which may cause accidental water seepage into the switching part 720 and cause water flow turbulence.

[0093] In one embodiment, the valve head 20 is provided with a water isolating ring 203 between the water inlet 201 and the water outlet 202, the water inlet 201 is connected to the outer peripheral side of the water isolating ring 203, the water outlet 202 is connected to the inner peripheral side of the water isolating ring 203, and the reversing member 720 is inserted in the water isolating ring 203 and the filter assembly 30 axially movable. It can be understood that the water isolating ring 203 and the filter assembly 30 are arranged opposite to each other in the axial direction, and one end of the reversing member 720 is plugged and matched with the water isolating ring 203, wherein the reversing member 720 can be sleeved outside the water isolating ring 203, or the water isolating ring 203 can be sleeved outside the reversing member 720, and the other end of the reversing member 720 is inserted into the inner peripheral side of the filter assembly 30. In this way, the reversing member 720 can stably switch between different positions corresponding to the filtering mode and the flushing mode under the restriction of the water isolating ring 203 and the filter assembly 30. Of course, in other embodiments, a corresponding water-isolating structure may be formed on the reversing member 720 or other components, which cooperates with the valve head 20 to perform the function of the water-isolating ring 203 in this embodiment.

[0094] In one embodiment, please refer to Figures 2 to 13The filter assembly 30 includes a water distributor 60 and a filter module 300 connected in the axial direction. A water passage cavity 340 is formed inside the filter module 300. The filter module 300 also forms a first water passage 330 and a second water passage 350 communicating with the water passage cavity 340. The filter module 300 includes a filter element 320, and the filter element 320 is arranged at the second water passage 350. The water distributor 60 has a first water passage space 610 corresponding to the first water passage 330 and a second water passage space 620 corresponding to the second water passage 350. A guide vane 621 is arranged in the second water passage space 620. The reversing element 720 extends into the water passage cavity 340 through the first water passage space 610. That is, the filter flow path between the water inlet 201 and the outer peripheral side of the filter module 300 can be communicated through the second water flow space 620, the baffle 722 can block the filter flow path by covering the second water flow space 620, and the filter flow path between the inner peripheral side of the filter module 300 and the water outlet 202 can be communicated through the first water flow space 610. In addition, the water flows into the water filter chamber 101 through the second water flow space 620, and a vortex can be formed to disturb the water flow and prevent the deposition of impurities.

[0095] It can be understood that in the filtering flow path of the pre-filter, the second water port 350, the water cavity 340 and the first water port 330 are sequentially distributed along the upstream and downstream. That is, when the pre-filter is in the filtering mode, the water flow entering from the water inlet 201 will flow to the water outlet 202 through the second water port 350, the water cavity 340 and the first water port 330 in sequence, that is, the water flow will flow from the outside of the filter module 300 to the inside of the filter module 300; and when the pre-filter is in the flushing mode, since the pre-filter is a backwashing type, the flow direction of the water flow will change for the filter module 300, and the water flow will flow from the inside of the filter module 300 to the outside of the filter module 300, that is, the water flow will flow from the inside of the filter cavity 340 through the second water port 350 to the filter cavity 101 on the outer peripheral side of the filter module 300.

[0096] Please also read Figure 2 and Figure 3When the reversing member 720 is driven to a position corresponding to the filtering mode, the position of the blocking portion 722 can avoid the filtering flow path between the water inlet 201 and the second water flow space 620, and cut off the flushing flow path between the water inlet 201 and the inner circumference of the reversing member 720, so that the filtering flow path from the water inlet 201 to the water filter chamber 101 through the water flow space is connected. At this time, since the sewage outlet 102 is closed and the water outlet 202 is opened, after the raw water enters from the water inlet 201, it can directly flow through the second water flow space 620 to the filter assembly 30 for filtration, and flow from outside to inside along the radial direction of the filter assembly 30, thereby filtering the raw water, and the filtered water flows to the water outlet 202 through the inner circumference of the reversing member 720.

[0097] Please also read Figure 2 and Figure 6 When the reversing member 720 is driven to a position corresponding to the flushing mode, the position of the blocking portion 722 can separate the water inlet 201 and the second water flow space 620 to separate the filtering flow path between the water inlet 201 and the water filter chamber 101, and the position of the connecting portion 721 can provide the water inlet 201 to connect to the inner circumference of the reversing member 720 to conduct the flushing flow path from the water inlet 201 to the water filter chamber 101 through the inner circumference of the reversing member 720. At this time, since the sewage outlet 102 is opened and the water outlet 202 is closed, the raw water enters from the water inlet 201, enters the inner circumference of the reversing member 720 through the connecting portion 721, and then flows to the filter assembly 30 to flush the filter assembly 30, and finally is discharged from the sewage outlet 102.

[0098] Among them, the connecting part 721 and the blocking part 722 are integrally formed on the switching part 720, which not only facilitates the assembly of the switching part 720, but also ensures the overall strength of the switching part 720, and avoids the possibility of an installation gap between the connecting part 721 and the blocking part 722, which may cause accidental water seepage into the switching part 720 and cause water flow turbulence.

[0099] In one embodiment, the water-isolating ring 203 and the water distributor 60 are jointly constructed to form a water-passing structure, and the water-passing structure is connected to the water inlet 201; on the adjacent side of the water distributor 60 and the water-isolating ring 203, the water-passing structure is separated from the connecting portion 721 in the filtering mode, and is connected to the connecting portion 721 in the flushing mode.

[0100] In this embodiment, the water-passing structure is formed by the water-isolating ring 203 and the water distributor 60. The reversing member 720 switches between different positions, and can change the relative positions between the blocking portion 722 and the connecting portion 721 and the water-passing structure, thereby controlling the connection and disconnection between the water-passing structure and the corresponding space, so that the corresponding flow path is connected and the corresponding flow path is blocked. Of course, in other embodiments, the water-passing structure can also be formed only on the water-isolating ring 203.

[0101] In one embodiment, please refer to Figure 2 , Figure 3 , Figure 6 and Figure 8 , the water isolating ring 203 and the water distributor 60 are spaced apart, the water passing structure is the space between the water isolating ring 203 and the water distributor 60, and the connecting portion 721 and the blocking portion 722 are distributed along the axial direction;

[0102] In the filtering mode, the blocking portion 722 is at least located between the water isolation ring 203 and the water distributor 60, so that the water inlet 201 is connected to the second water passage space 620;

[0103] In the flushing mode, the connecting portion 721 is at least partially located between the water isolation ring 203 and the water distributor 60 , so that the connecting portion 721 is connected to the water inlet 201 , and the blocking portion 722 blocks the second water flow space 620 .

[0104] In this embodiment, the water passing structure is configured as the interval between the water isolation ring 203 and the water distributor 60, the connecting portion 721 and the blocking portion 722 are distributed along the axial direction, and the reversing member 720 is axially movable relative to the filter bottle 10. In different modes, the reversing member 720 moves axially to respectively set the connecting portion 721 and the blocking portion 722 relative to the interval between the water isolation ring 203 and the water distributor 60.

[0105] When the blocking portion 722 is arranged relative to the interval between the water blocking ring 203 and the water distributor 60, the blocking portion 722 is at least located between the water blocking ring 203 and the water distributor 60, and the interval at this location is divided into two parts by the blocking portion 722, one part is located on the outer peripheral side of the reversing member 720, and the other part is located on the outer peripheral side of the reversing member 720. The two parts are not directly connected here, and the following filtration flow path is formed: raw water flows from the water inlet 201 through the second water flow space 620 to the water filter chamber 101, and in the water filter chamber 101, flows from the outer peripheral side of the filter component 30 to the inner peripheral side of the filter component 30, and then flows from the outer peripheral side of the reversing member 720 to the inner peripheral side of the reversing member 720, and finally flows to the water outlet 202.

[0106] When the connecting portion 721 is arranged relative to the interval between the water-isolating ring 203 and the water distributor 60, the connecting portion 721 is at least partially located between the water-isolating ring 203 and the water distributor 60. In this way, at the interval, the outer peripheral side of the reversing member 720 can be connected to the inner peripheral side of the reversing member 720 through the connecting portion 721. Since the blocking portion 722 blocks the second water flow space 620, the raw water flows from the water inlet 201 through the connecting portion 721 to the inner periphery of the reversing member 720, and then at the position corresponding to the filter assembly 30, it flows from the inner periphery of the reversing member 720 through the filter assembly 30 to the water filter chamber 101 on the outer peripheral side of the filter assembly 30, thereby flushing the filter assembly 30, and finally flows to the sewage outlet 102.

[0107] Among them, the direction from the connecting part 721 to the blocking part 722 can be the direction from the water isolation ring 203 to the water distributor 60, or it can be that the blocking part 722 includes two parts that block the second water flow space 620 and the gap between the water isolation ring 203 and the water distributor 60, and the two parts are respectively located on both sides of the axial direction of the connecting part 721, and the part that blocks the second water flow space 620 is on the side of the water distributor 60 away from the water isolation ring 203.

[0108] In other embodiments, the water passing structure can be configured as a through hole. In one embodiment, the water isolating ring 203 and the water distributor 60 are integrally formed, and the water passing structure can be configured as a through hole provided in the water isolating ring 203 and the water distributor 60; in another embodiment, the water isolating ring 203 and the water distributor 60 are separately formed, and the water isolating ring 203 and the water distributor 60 are abutted and assembled to form a through hole.

[0109] And when the water passing structure is configured as a through hole, the connecting portion 721 and the blocking portion 722 can be distributed along the circumference of the reversing member 720, that is, the connection relationship between different structures is changed by the rotation of the reversing member 720 relative to the water distributor 60 and the water blocking ring 203 to realize the switching of the filtering mode and the flushing mode. At this time, in the filtering mode, the through hole and the connecting portion 721 are circumferentially misaligned. Of course, the connecting portion 721 and the blocking portion 722 can also be distributed along the axial direction of the reversing member 720, that is, the reversing member 720 realizes the switching of the filtering mode and the flushing mode through axial movement. At this time, in the filtering mode, the through hole and the connecting portion 721 are axially misaligned.

[0110] In one embodiment, the water distributor 60 and the water-isolating ring 203 are arranged opposite to each other and spaced apart in the axial direction. In the filtering mode, the two axial sides of the baffle 722 are respectively connected to the water distributor 60 and the water-isolating ring 203 and spaced apart from the second water-passing space 620. In the flushing mode, the connecting portion 721 is at least partially located between the water distributor 60 and the water-isolating ring 203 and covers the second water-passing space 620. In this way, in the filtering mode, the water inlet 201 and the inner circumference of the reversing member 720 can be separated by the baffle 722 on the adjacent side of the water distributor 60 and the water-isolating ring 203, and the water inlet 201 will also be connected to the water filter chamber 101 on this side through the second water-passing space 620. In the flushing mode, the water inlet 201 and the inner circumference of the reversing member 720 can be connected through the connecting portion 721 on the adjacent side of the water distributor 60 and the water-isolating ring 203.

[0111] Specifically, the barrier portion 722 includes an annular main body 7221 extending along the axial direction of the reversing member 720, and a barrier skirt 7222 arranged around the outer periphery of the annular main body 7221. The annular main body 7221 is connected to the connecting portion 721 and is slidably connected to the water distributor 60. The barrier skirt 7222 is located between the water distributor 60 and the water isolation ring 203. In the flushing mode, the barrier skirt 7222 abuts against the water distributor 60 at the outer periphery of the second water flow space 620 to cover the second water flow space 620. In the filtering mode, there is a gap between the barrier skirt 7222 and the water distributor 60, and the outer periphery of the barrier skirt 7222 and the inner periphery of the filter bottle 10 are matched, so that the water inlet 201 can be connected to the second water flow space 620 through the above gap.

[0112] In one embodiment, a filtering structure is provided around the circumference of the connecting portion 721. Specifically, the peripheral wall of the connecting portion 721 has a porous structure that can be connected to the water inlet 201, so that in the flushing mode, the raw water flowing into the water filter chamber 101 from the water inlet 201 can pass through, so as to pass the raw water into the inner periphery of the filter assembly 30, and clean the filter assembly 30 from the inside to the outside. However, there may be impurities inside the raw water. If it is not filtered, the impurities in the raw water may be filtered and stored in the inner periphery of the filter assembly 30 during the flushing process. When the pre-filter chamber 101 is converted from the flushing mode to the filtering mode, the impurities in the inner periphery flow out of the water outlet 202 together with the filtered raw water, resulting in a poor initial filtering effect. Therefore, a filtering structure is also provided around the connecting portion 721, and the filtering structure is often configured as a filter net, which is fixed to the inner side or outer side of the porous structure, or integrally formed on the connecting portion 721. Among them, the filter net can be bonded to the connecting portion 721. In other embodiments, the filtering structure may also be directly disposed on the periphery of the water-isolating ring 203 by other fixed structures, so that the raw water flowing out of the water inlet 201 is filtered by the filtering structure and then flows to the connecting portion 721 .

[0113] In one embodiment, please refer to Figure 2 and Figure 8 , the reversing member 720 further includes a hollow pipe section 723, the connecting portion 721, the blocking portion 722 and the hollow pipe section 723 are sequentially distributed along the axial direction, the connecting portion 721 is plugged and matched with the water isolation ring 203, the blocking portion 722 is plugged and matched with the water distributor 60, and the hollow pipe section 723 extends into the filter module 300. It can be understood that the axis of the hollow pipe section 723 is parallel to or even coincides with the axis of the filter bottle 10, and the peripheral wall of the hollow pipe section 723 is provided with a through hole connected to the water filter cavity 101. In the flushing mode, the water flow entering the reversing member 720 from the connecting portion 721 can be guided to the inner periphery of the filter assembly 30 via the hollow pipe section 723.

[0114] In the filtering mode, raw water enters the filter chamber 101 from the water inlet 201, flows to the filter assembly 30 through the second water flow space 620 of the water distributor 60, and flows from the outside to the inside along the radial direction of the filter assembly 30, thereby filtering the raw water. After the filtered raw water enters the inner circumference of the filter assembly 30, it can enter the hollow pipe section 723, and then flow upward to the water outlet 202 under the action of water pressure; in the flushing mode, raw water enters the filter chamber 101 from the water inlet 201, enters the inner circumference of the reversing member 720 through the connecting portion 721, and continues to flow downward to the hollow pipe section 723, and then sprays toward the filter assembly 30, so that the cleaning water flow is sprayed from the outside to the inside along the radial direction of the filter assembly 30 to take away impurities on the filter assembly 30, thereby achieving the purpose of flushing the filter assembly 30, and then flows out from the sewage outlet 102.

[0115] In one embodiment, the driving member 800 includes a driving screw 810, and one of the valve head 20 and the reversing member 720 is rotatably connected to the driving screw 810 and axially fixed, and the other of the valve head 20 and the reversing member 720 is threadedly connected to the driving screw 810 via a screw connection structure.

[0116] When the reversing member 720 is screwed to the driving screw 810 through the screw connection structure, the driving screw 810 can rotate relative to the valve head 20, but is axially fixedly arranged relative to the valve head 20. In this way, when the driving screw 810 is rotated by the user, the driving screw 810 does not move axially relative to the valve head 20, but only rotates. Due to the threaded cooperation between the screw connection structure and the driving screw 810, the reversing member 720 will be driven to move axially relative to the valve head 20, thereby realizing the switching of the reversing member 720 between different axial positions.

[0117] When the valve head 20 is screwed to the driving screw 810 through a screw structure, the driving screw 810 can rotate relative to the reversing member 720, but is axially fixed relative to the reversing member 720. In this way, when the driving screw 810 is rotated by the user, the driving screw 810 can move axially relative to the valve head 20. Since the driving screw 810 and the reversing member 720 are relatively fixed in the axial direction, the reversing member 720 will be driven to move axially together. Moreover, since the driving screw 810 and the reversing member 720 are rotatably arranged, the reversing member 720 will not be driven by the driving screw 810 to rotate, which can reduce the movement of the reversing member 720 relative to the water barrier ring 203 and the filter assembly 30, thereby reducing friction.

[0118] In this embodiment, the driving member 800 drives the switching member 720 to move axially by means of a threaded connection. Of course, in other embodiments, the axial drive of the switching member 720 can also be achieved by a worm gear mechanism, or the driving member 800 drives the switching member 720 to rotate by an appropriate method.

[0119] In one embodiment, see Fig. 9 The screw connection structure is configured as a mounting bracket 740 fixedly mounted in the switching member 720, and the driving screw 810 is screwed to the mounting bracket 740, and is rotatably connected to the valve head 20 and fixed in the axial direction. Specifically, a screw hole is provided at the center of the mounting bracket 740, and the driving screw 810 is screwed to the screw hole to achieve screw connection between the switching member 720 and the driving screw 810. The mounting bracket 740 is provided with a plurality of water-passing holes at intervals around the circumference of the screw hole, so that the spaces on both sides of the axial direction between the mountings on the inner circumference of the switching member 720 can be connected, and the flow of water in the switching member 720 is not affected. Furthermore, the mounting bracket 740 can, of course, in other embodiments, an internal thread can be set on the inner circumference of the switching member 720, the mounting bracket 740 can be fixedly sleeved outside the driving screw 810, and an external thread can be set on the outer circumference of the mounting bracket 740. Through the screw connection between the mounting bracket 740 and the switching member 720, the screw connection drive between the driving screw 810 and the switching member 720 is realized.

[0120] In one embodiment, the mounting bracket 740 is detachably connected to the switching member 720. In this way, when one of the mounting bracket 740 and the switching member 720 is structurally damaged, the two can be disassembled and the damaged part can be replaced, which is conducive to saving the maintenance cost of the pre-filter. Of course, in other embodiments, the mounting bracket 740 can also be integrally formed with the switching member 720, or the two can be separately formed and fixedly connected by welding or bonding.

[0121] In one embodiment, the mounting bracket 740 is snap-connected to the reversing member 720. Of course, in other embodiments, the mounting bracket 740 and the reversing member 720 may also be connected by plugging, snapping or screw locking.

[0122] Specifically, the mounting bracket 740 includes an inner ring portion 741 and an outer ring portion 742 connected to each other, the driving screw 810 is screwed to the inner ring portion 741, and the outer ring portion 742 is snap-connected to the switching member 720. That is, the inner and outer peripheries of the mounting bracket 740 are both provided with ring portions, the inner periphery of the inner ring portion 741 is formed with screw holes for the driving screw 810 to be screwed, and the outer ring portion 742 can fit with the inner periphery of the switching member 720 to ensure that the mounting bracket 740 can be stably snap-connected to the switching member 720. Of course, in other embodiments, the outer periphery of the mounting bracket 740 may not be provided with a ring portion.

[0123] In one embodiment, a plurality of connecting arms 743 extending in the axial direction are connected to one axial side of the outer ring portion 742, and the plurality of connecting arms 743 are distributed at intervals in the circumferential direction, and the connecting arms 743 are provided with a snap-fitting protrusion 744, and the switching member 720 is correspondingly provided with a snap-fitting groove, and the snap-fitting protrusion 744 is snapped with the snap-fitting groove, and the inner ring portion 741 is arranged opposite to the connecting arms 743, and is connected to the plurality of connecting arms 743 one by one through a plurality of connecting ribs 745 distributed in the circumferential direction. That is, the inner ring portion 741 and the outer ring portion 742 are arranged in an axially staggered manner, and the outer ring portion 742 is snapped with the switching member 720 through the connecting arms 743, and the inner ring portion 741 is arranged opposite to the connecting portion 732, which is conducive to shortening the length of the force transmission path between the switching member 720 and the driving screw 810, and is convenient for driving the switching member 720. The inner ring portion 741 and the outer ring portion 742 are connected one-to-one by a plurality of connecting ribs 745 and a plurality of connecting arms 743, which is beneficial to enhancing the structural strength of the mounting bracket 740 and increasing the number of force transmission paths between the switching member 720 and the driving screw 810, thereby avoiding stress concentration between the two. The mounting bracket 740 is not easily damaged, which is beneficial to ensuring the connection stability between the switching member 720 and the driving screw 810.

[0124] In one embodiment, the buckle groove is formed in the baffle portion 722 , and the outer ring portion 742 is exposed at a port of the reversing member 720 . Specifically, the outer ring portion 742 is exposed at a port on a side of the connecting portion 721 away from the baffle portion 722 . Specifically, the connecting portion 721 and the blocking portion 722 are distributed axially from the water isolation ring 203 to the water distributor 60, and the connecting portion 721 has a hole-like structure distributed circumferentially. The mounting bracket 740 is inserted into the inner circumference of the reversing member 720 from one side of the connecting portion 721, wherein the end face of the outer ring portion 742 is preferably flush with the end face of the reversing member 720, and the connecting arm 743 extends into the inner circumference of the reversing member 720 relative to the blocking portion 722. A snap-fitting protrusion 744 is provided at the end of the connecting arm 743, which is snapped with the buckle groove of the blocking portion 722 through the snap-fitting protrusion 744. In this way, the connection stability between the mounting bracket 740 and the reversing member 720 can be guaranteed, and the mounting bracket 740 has little obstruction to the water flow at the connecting portion 721. Furthermore, the inner ring portion 741 is located relative to the blocking portion 722, and the inner ring portion 741 will not block the water flow at the connecting portion 721.

[0125] In one embodiment, please refer to Figure 2 , Figure 3 and Figure 6 , the driving member 800 further includes a driving knob 820, which is fixedly mounted at the end of the driving screw 810 and is located outside the valve head 20. In this way, the user can rotate the driving knob 820 to drive the driving screw 810 to rotate relative to the valve head 20, and the outer diameter of the driving knob 820 can be set to be larger than the outer diameter of the driving screw 810. Furthermore, anti-slip grooves can be set on the outer periphery of the driving knob 820, or a flat position can be set on the end surface of the driving knob 820 to facilitate user operation. Of course, in other embodiments, the end of the driving screw 810 can also be exposed to the valve head 20, and a flat position can be set, so that the user can act on the driving screw 810 with a wrench, thereby driving the driving screw 810 to rotate.

[0126] In one embodiment, the driving knob 820 is rotatably connected to the valve head 20 and is limitedly matched with the valve head 20 in the axial direction so that the two are relatively fixed in the axial direction. In this way, through the limited matching of the driving knob 820 and the valve head 20, the driving screw 810 can be relatively fixed with the valve head 20 in the axial direction to ensure the motion transmission between the driving screw 810 and the reversing member 720. Specifically, it can be that a groove is provided on the outer side of the valve head 20, and the driving knob 820 is at least partially accommodated in the groove. One of the inner wall of the groove and the outer periphery of the driving knob 820 is provided with an annular groove, and the other is provided with a convex portion slidably connected with the annular groove. The convex portion can be annular, or can be provided at a single point, or can be provided in multiple portions and distributed at intervals along the circumferential direction. In this way, through the matching of the annular groove and the convex portion, the driving knob 820 and the driving screw 810 can be relatively fixed with the valve head 20 in the axial direction and can rotate relative to the valve head 20. Of course, in other embodiments, the drive screw 810 may be limitedly matched with the valve head 20 in the axial direction.

[0127] In one embodiment, please refer to Figure 2 , Figure 4 and Figure 7 The reversing member 720 also includes a movable member 730, and the reversing member 720 is transmission-connected to the movable member 730. The movable member 730 includes a blocking portion 731. The valve head 20 is provided with a sewage discharge channel 140 on the side of the filter assembly 30 away from the water distributor 60. The sewage discharge channel 140 is connected to the water filter chamber 101 through the sewage discharge port 102. The blocking portion 731 is located in the sewage discharge channel 140, and blocks the sewage discharge channel 140 in the filtering mode, and opens the sewage discharge channel 140 in the flushing mode. In this way, when the reversing member 720 moves to different positions, it can not only switch the flow path between the water inlet 201 and the water filter chamber 101, but also drive the movable member 730 to move to open or close the sewage channel 140. That is, the blocking portion 731 of the movable member 730 realizes a function similar to a valve core at the sewage channel 140. Therefore, there is no need to set a valve body structure at the sewage channel 140. When the pre-filter switches the mode, it is only necessary to perform corresponding operations on the valve body at the water outlet 202 and perform corresponding operations on the reversing member 720.

[0128] In one embodiment, the reversing member 720 also includes a movable member 730, and the reversing member 720 is transmission-connected to the movable member 730, and the movable member 730 includes a sealing portion 731. The shell forms a sewage channel 140 on the side of the filter assembly 30 away from the water distributor 60, and the sewage channel 140 is connected to the water filter chamber 101 through the sewage outlet 102. The sealing portion 731 is located in the sewage channel 140, and blocks the sewage channel 140 in the filtering mode, and opens the sewage channel 140 in the flushing mode. In this way, when the reversing member 720 moves to different positions, it can not only switch the flow path between the water inlet 201 and the water filter chamber 101, but also drive the movable member 730 to move to open or close the sewage channel 140. That is, the blocking portion 731 of the movable member 730 realizes a function similar to a valve core at the sewage channel 140. Therefore, there is no need to set a valve body structure at the sewage channel 140. When the pre-filter switches the mode, it is only necessary to perform corresponding operations on the valve body at the water outlet 202 and perform corresponding operations on the reversing member 720.

[0129] In one embodiment, please refer to Figure 2 , Figure 4 and Figure 7 The sewage channel 140 has a first channel 141 and a second channel 142 that are coaxially connected, and the first channel 141 is located on a side close to the water filter chamber 101; the movable part 730 also includes an avoidance portion 733, and the avoidance portion 733 is connected to a side of the blocking portion 731 close to the blocking portion 722; in the filtering mode, the blocking portion 731 blocks the first channel 141, and in the flushing mode, the blocking portion 731 is in the second channel 142 and is gapped with the second channel 142, and the avoidance portion 733 passes through the first channel 141 and is gapped with the first channel 141. It can be understood that the inner diameter of the second channel 142 is larger than the outer diameter of the sealing portion 731, the inner diameter of the first channel 141 is larger than the outer diameter of the avoidance portion 733, the inner diameter of the second channel 142 is larger than the inner diameter of the first channel 141, the outer diameter of the blocking portion 731 is larger than the outer diameter of the avoidance portion 733, the avoidance portion 733 and the first channel 141 and the second channel 142 can all be loosely matched, when the reversing member 720 moves, the avoidance portion 733 will not interfere with the sewage channel 140, and, in the flushing mode, the avoidance portion 733 and the sealing portion 731 will not block the sewage channel 140, so that the sewage channel 140 is opened, and the filter chamber can be connected to the sewage pipe via the gap between the second channel 142 and the avoidance portion 733 and the gap between the first channel 141 and the sealing portion 731 in sequence.

[0130] In one embodiment, please refer to Figure 2 , Figure 4 and Figure 7 , the outer periphery of the blocking portion 731 is provided with a sealing ring 10022. In the filtering mode, the blocking portion 731 is located in the first channel 141, and the outer periphery of the sealing ring 10022 abuts against the inner peripheral wall of the first channel 141. At this time, the outer diameter of the blocking portion 731 should be equal to or slightly smaller than the inner diameter of the first channel 141, so that the blocking portion 731 can achieve the blocking of the first channel 141 through the sealing ring 10022 and the inner peripheral wall of the first channel 141. Among them, the cross section of the sealing ring 10022 can be circular or peanut-shaped or V-shaped. Of course, in other embodiments, in the filtering mode, the blocking portion 731 can also abut against the step surface at the connection between the first channel 141 and the second channel 142, and the end side of the first channel 141 is blocked by the end side of the blocking portion 731, so as to achieve the sealing of the first channel 141. At this time, the outer diameter of the blocking portion 731 should be greater than the inner diameter of the first channel 141.

[0131] In one embodiment, please refer to Figure 2 , Figure 5 and Figure 8 , the movable member 730 is fixedly connected to the reversing member 720. In this way, when the reversing member 720 is driven to move axially, the movable member 730 can be driven to move axially synchronously, so that the blocking portion 731 moves correspondingly in the sewage discharge channel 140. Of course, in other embodiments, the reversing member 720 and the movable member 730 can also be connected through an intermediate structure. For example, the reversing member 720 and the movable member 730 are plugged in so as to be axially movable, and an elastic member is connected between the two to transmit the axial movement through the elastic member.

[0132] Specifically, the switching member 720 includes a hollow pipe section 723, and the hollow pipe section 723 and the movable member 730 are fixedly connected at the inner periphery of the filter assembly 30. Specifically, the end of the avoidance portion 733 away from the blocking portion 731 also has a connecting portion 732, and the connecting portion 732 extends into the filter assembly 30 and is connected to the hollow pipe section 723. Among them, the movable member 730 and the switching member 720 can be connected by threading, that is, one of the hollow pipe section 723 and the connecting portion 732 is provided with a screw hole, and the other is provided with an external thread, and the two are fixedly connected by screwing. In this way, the movable member 730 and the switching member 720 are separately formed, and different materials can be selected for processing and forming to meet the needs of switching and blocking respectively. Of course, in other embodiments, it can also be that the switching member 720 and the blocking portion 731 are integrally formed.

[0133] In one embodiment, please refer to Fig.10The filter assembly 30 includes a plurality of filter modules 300, and the plurality of filter modules 300 are sequentially connected along the axial direction. The setting of the plurality of filter modules 300 improves the modularity of the filter assembly 30, and the number of the filter modules 300 can be flexibly adjusted according to the model of the pre-filter (for example, but not limited to the size of the filter bottle 10), so as to achieve the effect of adjusting the size of the filter assembly 30, thereby solving the problem of sharing the filter assembly 30 of the pre-filters of different models. Since the filtration area on each filter module 300 is fixed, by adjusting the number of the filter modules 300, the total filtration area of ​​the filter assembly 30 can also be adjusted, so that a suitable filtration area can be set, thereby achieving the effect of improving the filtration effect.

[0134] Furthermore, the filter element 320 is annular and has an inner ring edge and an outer ring edge, and the outer ring edge is located on one axial side of the inner ring edge. It can be understood that the filter element 320 is arranged in an annular shape, and the outer ring edge of the filter element 320 is located on one axial side of the inner ring edge of the filter element 320, that is, the inner ring edge and the outer ring edge are not at the same height in the axial direction. Under the axial condition of the same height, the filtering area of ​​the filter element 320 can be increased, which means that under the same flow rate, the filter element 320 of this scheme can withstand a larger flow load and improve the filtering efficiency. Moreover, since the filtering area of ​​the filter element 320 of this scheme is large enough, even if a local area of ​​the filter element 320 is clogged, the remaining area of ​​the filter element 320 can continue to withstand a larger flow load, which helps to extend the service life of the filter module 300 and reduce the replacement frequency, thereby reducing maintenance costs.

[0135] Furthermore, the outer side surface of the filter element 320 is set in a conical surface. The design of the conical surface is conducive to the uniform distribution and smooth flow of the fluid, reduces the eddy current and turbulence of the fluid inside the filter module 300, and reduces energy loss. Specifically, the generatrix of the conical surface can be a straight line, or the generatrix of the conical surface can also be a concave arc line that is concave toward the inside of the water cavity 340, or the generatrix of the conical surface can also be a convex arc line that protrudes out of the water cavity 340. In other embodiments, the outer side surface of the filter element 320 can also be a pyramidal surface, and the cross-section of the pyramidal surface is a polygon, so that the filtering area of ​​the filter element 320 can be increased.

[0136] In one embodiment, if Fig.11 and Fig.12As shown, the first connection structure 301 and the second connection structure 302 are respectively provided on both axial sides of the filter module 300, and the first connection structure 301 of one filter module 300 is used to be detachably connected with the second connection structure 302 of another filter module 300, so that the two filter modules 300 are fixed to each other, and at least one of the first connection structure 301 and the second connection structure 302 can be detachably connected with the water distributor 60. That is, the structure of detachable connection between the two filter modules 300 is also used for detachable connection with the water distributor 60, so that the modularization degree of the filter assembly 30 can be improved, and the assembly between the various structures of the filter assembly 30 is convenient.

[0137] Among them, it can be, for example Fig.12 As shown, one of the first connection structure 301 and the second connection structure 302 is configured as a convex, and the other is configured as a slot. The water distributor 60 is correspondingly configured with a convex or a slot. Of course, it can also be, for example Fig.11 As shown, one of the first connection structure 301 and the second connection structure 302 is configured as a hook, and the other is configured as a hook groove, and the water distributor 60 is correspondingly configured with a hook or a hook groove.

[0138] Specifically, the filter module 300 may be provided with a latching protrusion on a side close to the water distributor 60 and a latching groove on a side away from the water distributor 60, and the water distributor 60 may be provided with a latching groove on a side close to the filter module 300. In this way, the water distributor 60 and the filter module 300 as well as two adjacent filter modules 300 may be detachably connected through the cooperation of the latching protrusion and the latching groove, and the same is true for the cooperation of the hook groove and the latching hook.

[0139] In one embodiment, please refer to Figures 11 to 13 , the filter module 300 includes two support frames 310 distributed along the axial direction, the water passage cavity 340 is formed between the two support frames 310, each of the support frames 310 is provided with the filter element 320, and the inner ring edge and the outer ring edge of the two adjacent filter elements 320 are distributed in opposite directions. It can be understood that when the radial space in the water filter cavity 101 is constant, compared with the filter module 300 that maintains a tapered shape in one direction, the two filter elements 320 of the same filter module 300 are tapered in opposite directions, which can obtain a larger filtering area. In this way, the present embodiment can make full use of the space in the water filter cavity 101, and form a larger filtering area on the peripheral side of the filter module 300 to ensure that the filter assembly 30 can withstand a larger flow load and improve the filtering efficiency. At the same time, a sufficiently large water passage cavity 340 can be formed in the two support frames 310 to facilitate the flow of water. Of course, in other embodiments, a filter module 300 may also include only one support frame 310 , and the first water outlet 330 , the second water outlet 350 and the water passage cavity 340 are formed on the same support frame 310 .

[0140] In one embodiment, the support frame 310 includes an oblique support portion 311, and the two ends of the oblique support portion 311 are respectively connected to a first ring portion 312 and a second ring portion 313, and the two oblique support portions 311 of the same filter module 300 are connected through the second ring portion 313, and the inner periphery of the first ring portion 312 is provided with the first water outlet 330, and the second water outlet 350 is provided at the oblique support portion 311. In this way, the structural strength of the support frame 310 can be guaranteed, and the connection strength between the two support frames 310 can be guaranteed, so as to ensure the filtering capacity of the filter assembly 30. Of course, in other embodiments, the support frame 310 can also be set to other structural forms.

[0141] Specifically, the inclined support portion 311 includes a plurality of ribs spaced apart along the circumferential direction to form a plurality of second water outlets 350 spaced apart along the circumferential direction. The filter element 320 is stacked on the inclined support portion 311. In this way, the filter element 320 can be provided with sufficient support by the inclined support portion 311. In addition, the total flow area of ​​the second water outlet 350 is relatively large, so that the filter module 300 has sufficient flow capacity.

[0142] Specifically, the water distributor 60 is connected to a filter module 300 arranged closer to the valve head 20. The first water outlet 330 of the filter module 300 is connected to the water outlet 202 through the inner peripheral space of the water distributor 60. The two adjacent filter modules 300 are connected by the first ring portion 312. The water flow chambers 340 of the two are connected through the first water outlet 330. The second water outlet 350 is arranged on the peripheral side of the filter component 30. In the filtering mode, the raw water located on the periphery of the filter component 30 enters the water flow chamber 340 through the second water outlet 350, and then flows to the water outlet 202 through the first water outlet 330.

[0143] Without loss of generality, the outer diameter of the second ring portion 313 is greater than the outer diameter of the first ring portion 312, so that each filter element 320 will be alternately tapered in the upper and lower directions, which can make fuller use of the space in the water filter cavity 101 to provide a larger filtering area, thereby further improving the filtering efficiency of the filter assembly 30. Of course, in other embodiments, the outer diameter of the first ring portion 312 may be greater than the outer diameter of the second ring portion 313, or there may be no definite size relationship between the diameters of the first ring portion 312 and the second ring portion 313.

[0144] In one embodiment, each of the support skeletons 310 is provided with the second ring portion 313, and the two second ring portions 313 of the same filter module 300 are detachably connected. It can be understood that the detachable connection allows the parts to be easily separated without damaging the connector itself or adjacent parts. This feature allows the filter module 300 to be operated quickly and effectively when the support skeleton 310 needs to be repaired or replaced, reducing the difficulty and cost of maintenance. Since the detachable connection is easy to operate, it can greatly save time when the filter module 300 maintains and replaces the support skeleton 310. Moreover, the detachable connection allows the fast replacement of the faulty support skeleton 310, thereby reducing the water outage time of the water system and improving the maintenance efficiency. Secondly, compared with the non-detachable connection, the detachable connection reduces the situation of the overall scrapping of the parts due to the inability to disassemble, and reduces the waste of resources. Furthermore, the detachable connection allows the filter assembly 30 to be inspected and maintained regularly or irregularly to ensure its stability and safety, which helps to timely discover and solve potential safety hazards.

[0145] Further, in some possible connection modes, the two second ring portions 313 are snap-fitted. It can be understood that when the second ring portion 313 is made of plastic or metal, the snap-fit ​​structure can be directly formed on the second ring portion 313, and no additional locking accessories, such as screws, nuts, etc., are required during assembly, thereby reducing manufacturing costs and assembly costs. Moreover, since the snap-fit ​​structure is flexible in design, it can be customized according to the actual needs of the second ring portion 313, reducing material waste and improving material utilization. Secondly, snap-fitting can achieve rapid assembly and disassembly without the need for complex tools and equipment. This greatly improves production efficiency and assembly efficiency, and also facilitates the maintenance and replacement of the filter module 300. Specifically, the snap-fit ​​structure can be a combination of a hook and a hook groove, or a combination of a convex and a groove. Of course, in other embodiments, the two second ring portions 313 may be threadedly connected. Through the tight engagement of the threads, the connection between the two second ring portions 313 has higher tensile and compressive strengths, which can meet the use requirements under various working conditions. After assembly, the connection portion 732 is not easy to loosen and can maintain a stable connection state, thereby ensuring the normal operation of the filter module 300.

[0146] Optionally, in the same filter module 300, the end faces of the two second ring portions 313 abut against each other; it can be understood that in the same filter module 300, the two support skeletons 310 are connected by the two second ring portions 313, and the water passage cavity 340 is formed between the two support skeletons 310. By abutting the end faces of the two second ring portions 313, the two support skeletons 310 can be connected and the water passage cavity 340 can be sealed at the same time, which is beneficial to saving processing steps and improving production efficiency.

[0147] In one embodiment, the first ring parts 312 of the two adjacent filter modules 300 are detachably connected, and the specific method of detachably connecting the two first ring parts 312, as well as the connection method between the water distributor 60 and the filter module 300, can all refer to the connection method of the two second ring parts 313. In this way, it is convenient to modularize the assembly between different filter modules 300, and to disassemble and assemble the water distributor 60 and the corresponding filter module 300. Further, the end faces of the first ring parts 312 of the two adjacent filter modules 300 are abutted, so that the connection of the first water outlets 330 of the two adjacent filter modules 300 can be achieved while realizing the connection of the two adjacent filter modules 300, thereby saving processing steps and improving production efficiency. Similarly, the end face of the water distributor 60 abuts against the end face of the corresponding first ring part 312, and while realizing the connection of the water distributor 60 and the filter module 300, the first water space 610 is connected to the corresponding first water outlet 330.

[0148] In one embodiment, please refer to Figure 2 and Fig.14 , the pre-filter also includes an exoskeleton 50, and the exoskeleton 50 is rotatably mounted on the outside of the filter assembly 30. In this way, the exoskeleton 50 can be rotated to disturb the water flow in the water filter chamber 101, thereby preventing impurities from being deposited and attached to the filter assembly 30, the exoskeleton 50 and the side walls of the water filter chamber 101, reducing the possibility of clogging of the filter assembly 30, thereby ensuring the filtering effect of the filter assembly 30. In this embodiment, the exoskeleton 50 includes a side frame 512 and a chassis 511, and the chassis 511 is connected to the side frame 512 and is located on a side away from the valve head 20, with strong structural stability and high rotation stability. Of course, in other embodiments, the exoskeleton 50 may also include only the side frame 512 structure.

[0149] In one embodiment, see Fig.14 and Fig.18 The outer frame 50 is formed with a siphon channel 501, the side frame 512 is provided with a siphon hole 531 connected to the siphon channel 501, and the bottom plate 511 is provided with a first discharge port 503 connected to the siphon channel 501, and the first discharge port 503 is connected to the sewage outlet 102 at least in the flushing mode. The technical solution of the present invention is to set the siphon channel 501 and the siphon hole 531 on the outer frame 50, when the impurities and particles intercepted by the filter assembly 30 are impacted by the water flow and fall off, they can be sucked into the siphon hole 531 and the siphon channel 501 by the siphon effect, and be more efficiently discharged to the sewage outlet 102 through the first discharge port 503. That is, the impurities, particles, etc. intercepted by the filter assembly 30 can be more effectively guided to the sewage outlet 102 in the flushing mode, and finally discharged through the sewage outlet 102, thereby improving the flushing effect of the water filter cavity 101, especially the filter assembly 30.

[0150] In one embodiment, see Figures 14 to 17 An impeller assembly 40 is also provided in the water filter chamber 101. The impeller assembly 40 includes a mounting seat 410 and an impeller body 440 rotatably mounted on the mounting seat 410. The mounting seat 410 is formed with a first water inlet 402 and a drain port 404. The first water inlet 402 is connected to the first discharge port 503, and the drain port 404 is connected to the sewage outlet 102 at least in the flushing mode.

[0151] During the flushing stage of the pre-filter, that is, when the drain valve is opened, water flows into the pre-filter through the water inlet of the impeller assembly 40, and the impeller body 440 rotates under the impact of the water flow. This rotational motion can generate a vortex effect, so that the water flow forms a stronger agitation inside the filter bottle 10, thereby more effectively removing impurities and dirt attached to the surface of the filter medium. Compared with static water flow, the dynamic cleaning of the impeller assembly 40 can significantly improve the efficiency and effect of flushing. In addition, the rotational motion of the impeller body 440 can stir up the impurities and dirt inside the filter bottle 10, suspending them in the water, and discharge the filter bottle 10 with the water flow through the drain valve and the drain port 102, thereby avoiding the re-deposition of impurities on the filter medium and ensuring the thoroughness of the flushing process. In addition, the impeller assembly 40 can effectively prevent the clogging of the filter medium, keep the water flow unobstructed, and maintain the filtering efficiency of the pre-filter by enhancing the flushing effect. This is crucial to maintaining stable water pressure and clean water quality in home or commercial systems.

[0152] In addition, the impeller assembly 40 is arranged upstream of the sewage outlet 102. The impeller assembly 40 generates centrifugal force through rotation, which can cause the water flowing out of the sewage outlet 102 to generate a vortex, thereby improving the drainage effect and flushing efficiency and reducing water waste. The design of the impeller assembly 40 helps to achieve a more environmentally friendly and energy-saving filtration system.

[0153] By arranging the impeller assembly 40 in the sewage system and using the water flow power to drive the impeller body 440 to rotate, not only can the flushing force and stirring effect of the water flow be enhanced, but also the sewage discharge efficiency and cleanliness can be improved. At the same time, the design of the impeller assembly 40 can be relatively simple, low cost, and no additional energy consumption is required, which helps to reduce the overall operating cost and reduce the waste of water resources.

[0154] Furthermore, the outer frame 50 is transmission-connected to the impeller body 440 , so that the impeller body 440 can rotate in the same direction as the outer frame 50 during the flushing stage and provide additional rotational driving force to the outer frame 50 .

[0155] There are many structural forms for realizing the transmission connection between the outer frame 50 and the impeller body 440. For example, the impeller body 440 is coaxially connected with the outer frame 50 and fixed in the circumferential direction, that is, the impeller body 440 and the rotation axis of the outer frame 50 are kept fixed in the circumferential direction. Specifically, the outer frame 50 may have a plurality of first protrusions 513 distributed along the circumference on one side facing the mounting seat 410, and a plurality of second protrusions 443 are provided at one end of the impeller shaft 441 close to the outer frame 50. The plurality of second protrusions 443 are distributed along the circumference of the impeller shaft 441, and a first protrusion 513 is clamped between two adjacent second protrusions 443. It can be understood that the movable part 730 needs to pass through the mounting seat 410, the impeller body 440 and the outer frame 50, and then be fixed with the reversing part 720 in the filter assembly 30, and the first protrusion 513 and the second protrusion 443 are matched at the outer periphery of the movable part 730. In this way, the rotation of the outer frame 50 and the rotation of the impeller body 440 can promote each other to ensure the turbulent effect of the outer frame 50 and the impeller body 440, thereby avoiding the deposition of impurities.

[0156] See also Fig.19 It is worth mentioning that the first discharge port 503 is set at an oblique angle, which can make the water flow obliquely enter the mounting seat 410, thereby improving the rotation efficiency of the impeller body 440.

[0157] In one embodiment, please refer to Fig.14 , Fig.15 and Fig.19 , the mounting seat 410 is also provided with a second water inlet 403, the first water inlet 402 is provided on one axial side of the mounting seat 410, and the second water inlet 403 is provided on the circumferential side of the mounting seat 410. Correspondingly, the impeller body 440 includes an impeller shaft 441 and a plurality of impeller blades 442 obliquely provided on the impeller shaft 441, and the water flows from the first water inlet 402 and the second water inlet 403 can both cause the impeller blades 442 to drive the impeller shaft 441 to rotate. In this way, the water flow path and flow rate entering the mounting seat 410 are increased through the first water inlet 402 and the second water inlet 403, and the provision of multiple water inlets can form a more complex flow pattern of water flow in the impeller chamber, providing sufficient power for the rotation of the impeller body 440.

[0158] See also Fig.17 Specifically, optionally, the impeller body 440 includes an impeller shaft 441 and a plurality of inclined impeller blades 442, one side of the impeller blade 442 is curved into an arc surface, a portion of the arc surface faces the first water inlet 402, and the other portion faces the second water inlet 403, so that the impeller blade 442 can be acted upon by the water flow of the second side water inlet 403 and the first top water inlet 402 and drive the impeller shaft 441 to rotate.

[0159] Sewage enters the impeller chamber through the first water inlet 402 and the second water inlet 403, interacts with the rotating impeller body 440, generates a rotating force and a stirring effect, and helps to flush out the impurities remaining in the filter assembly 30. The rotating impeller body 440 not only enhances the rotating force and stirring effect of the water flow, but also guides the water flow to the sewage outlet 102 through its specific impeller blade 442 design, thereby improving the sewage discharge efficiency and cleanliness. The drain outlet 404 is set at the bottom or side of the mounting seat 410 (usually opposite to the sewage outlet 102) to facilitate the discharge of sewage.

[0160] In one embodiment, see Fig.19 The chassis 511 is also provided with a second discharge port 504 extending axially therethrough, and a water retaining structure is formed on opposite sides of the exoskeleton 50 and the mounting seat 410, the water retaining structure is arranged around the first discharge port 503, the second discharge port 404 is located on the outer periphery of the water retaining structure, the first water inlet 402 is connected to the first discharge port 503, and the second water inlet 403 is connected to the second discharge port 504.

[0161] Specifically, see Fig.15 and Fig.19 The bottom of the outer frame 50 is provided with a water retaining ring 514, and the mounting seat 410 is provided with a water retaining ring 424. The water retaining ring 514 and the water retaining ring 424 cooperate to form a water retaining structure. The siphon flow channel 501 and the first water inlet 402 are connected at the inner periphery of the water retaining structure, and the filter water cavity 101 at the outer periphery of the filter assembly 30 is connected to the second water inlet 403 at the outer periphery of the water retaining structure through the second discharge port 504. Further, the mounting seat 410 is provided with second water inlets 403 on both opposite sides. When draining, the water in the filter bottle 10 other than the siphon flow channel 501 can enter from these two second water inlets 403. Four first water inlets 402 inclined in the same direction are designed on the mounting seat 410, and the water flowing out of the siphon flow channel 501 enters the impeller cavity through the first water inlet 402.

[0162] In one embodiment, see Fig.18 and Fig.19The side frame 512 is provided with a water flow driving member 540, and the water flow driving member 540 has a driving surface 544. The driving surface 544 is set at an angle relative to the circumference of the outer frame 50, so that after the driving surface 544 is subjected to the impact of the water flow, it can drive the outer frame 50 to rotate. It can be understood that after the water flows through the water distributor 60, a vortex is formed, and it can be opposite to or inclined opposite to the driving surface 544, and can be driven by the water flow. At the same time, the driving surface 544 is inclined relative to the circumference of the exoskeleton 50. When the driving surface 544 is driven by the water flow, the water flow driving member 540 can generate a driving force on the exoskeleton 50 in the circumference of the exoskeleton 50, thereby prompting the exoskeleton 50 to rotate around its axis, that is, around the axial rotation of the filter component 30, so that the kinetic energy of the water flow can be converted into the kinetic energy of the rotation of the exoskeleton 50 through the driving surface 544, and the rotation of the exoskeleton 50 is realized, thereby disturbing the water flow in the water filter chamber 101, avoiding impurities from being deposited and attached to the filter component 30, the exoskeleton 50 and the side walls of the water filter chamber 101, reducing the possibility of blockage of the filter component 30, and thus improving the filtering effect of the filter component 30.

[0163] In one embodiment, the water flow driving member 540 includes a hanging portion 541 and a driving body 542, the hanging portion 541 is hung on the end of the side frame 512 away from the chassis 511, the driving body 542 is arranged in a conformal manner with the inner wall of the side frame 512, the driving body 542 extends in an arc shape along the circumference of the side frame 512, and has a plurality of water baffles 543 distributed at intervals, and the driving surface 544 is formed on the water baffles 543.

[0164] Without loss of generality, the water baffle 543 is protruding from the driving body 542, and the driving surface 544 is formed on the side wall of the water baffle 543 along the circumference of the side frame 512, so that the driving surface 544 can have a certain size in the radial direction to ensure that the driving surface 544 is stably impacted by the water flow. At the same time, the driving body 542 extends in an arc shape along the inner circumference of the side frame 512, and multiple water baffles 543 are spaced apart in the extension direction of the driving body 542 to evenly distribute the driving force in the circumference of the side frame 512 to ensure the stability of the rotation of the exoskeleton 50. In addition, the driving body 542 is arranged in a conformal manner on the inner wall of the side frame 512, and the two are closely fitted. When the driving body 542 is subjected to force, the inner wall of the side frame 512 can provide a sufficiently stable support for the driving body 542, thereby effectively pulling the side frame 512 to rotate, avoiding shaking between the water flow driving member 540 and the side frame 512, resulting in energy waste, ensuring the rotation efficiency of the outer frame 50, and improving the cleaning effect of the filter assembly 30. In addition, the water flow driving member 540 can be stably assembled on the side frame 512 through the hanging part 541 to ensure reliable driving of the outer frame 50.

[0165] Without loss of generality, the side wall of the water baffle 543 extends along the axial direction of the outer frame 50, so that the driving surface 544 is parallel to the axial direction of the outer frame 50. It can be understood that the driving surface 544 is distributed in the circumferential direction of the side frame 512, and can refer to the above-mentioned arrangement of the water distributor 60, and guide the water flow to impact the driving surface 544 by the guiding effect of the guide blade 621 on the water flow, or, a drainage structure is set on the channel wall between the water inlet 201 and the water flow driving member 540, and the water flow is diverted and pushed along the axial direction of the filter component 30 in a vortex shape, and then it can directly impact the driving surface 544 parallel to the axial direction of the outer frame 50, so that the water flow driving member 540 obtains a larger water flow impact force, improves the rotation speed or rotation efficiency of the outer frame 50, prevents impurities from adhering to the filter component 30, ensures the cleanliness of the filter component 30, and improves the filtering efficiency of the filter component 30 for the water flow.

[0166] In one embodiment, see Fig.18 and Fig.19 The side frame 512 is also provided with a cleaning structure 90, which is staggered with the siphon flow channel 501. The cleaning structure 90 can also be arranged in multiple groups in the circumferential direction to clean at least one of the inner wall of the filter bottle 10 and the outer peripheral side of the filter module 300. In the flushing mode, with the rotation of the outer frame 50, the cleaning structure 90 can sweep away the impurities on the relevant structure through the cleaning effect, so that the impurities are separated and can be discharged with the water flow, thereby avoiding serious blockage on the filter assembly 30, ensuring the filtering effect of the filter assembly 30, and improving the service life of the pre-filter.

[0167] Specifically, the cleaning structure 90 includes a cleaning brush disposed on the inner circumference of the side frame 512, and the cleaning brush is tilted toward the filter 320. In this way, more bristles of the cleaning brush can be directed toward the filter 320, thereby improving the cleaning effect of the cleaning brush on the filter 320. It can be understood that the bristles at the end of the cleaning brush should abut against the filter 320 and stretch out to cover the filter 320 to ensure the cleaning effect of the cleaning brush on the filter 320.

[0168] It should be noted that the multiple indicated in this solution, unless otherwise specified, should be understood as greater than or equal to two.

[0169] The present invention also proposes a water system, which includes a pre-filter. The specific structure of the pre-filter refers to the above embodiment. Since the water system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the water system at least includes related components from the pre-filter to the water end. For example, the water system can include household appliances such as water heaters, dishwashers, and water dispensers, and can also include accessories such as water pipes for domestic water in the whole house.

[0170] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pre-filter, characterized in that: include: A valve head and a filter bottle, wherein the filter bottle is formed with a water filter cavity, the valve head is provided with a water inlet and a water outlet connected to the water filter cavity, and a sewage outlet is provided on a side of the filter bottle away from the valve head; A filter assembly is disposed in the water filter cavity; A reversing member, wherein the reversing member is hollow, and the inner peripheral side of the reversing member is connected to the water outlet and the water filter chamber, and the reversing member includes a connecting portion and a blocking portion, and the reversing member can be movably inserted into the filter assembly to enable the pre-filter to switch between a filtering mode and a flushing mode, and the flushing flow path between the water inlet and the reversing member is connected through the connecting portion and cut off through the blocking portion; as well as A driving member is drivingly connected to the switching member and exposed on the outside of the pre-filter.

2. The pre-filter according to claim 1, characterized in that: The valve head is provided with a water isolating ring between the water inlet and the water outlet, the water inlet is connected to the outer peripheral side of the water isolating ring, the water outlet is connected to the inner peripheral side of the water isolating ring, and the reversing member is axially movably inserted in the water isolating ring and the filter assembly.

3. The pre-filter according to claim 2, characterized in that: The filter assembly includes a water distributor and a filter module connected along the axial direction, a water flow cavity is formed inside the filter module, and the filter module also forms a first water flow port and a second water flow port connected to the water flow cavity, the filter module includes a filter element, and the filter element is arranged at the second water flow port, the water distributor has a first water flow space corresponding to the first water flow port and a second water flow space corresponding to the second water flow port, a guide vane is arranged in the second water flow space, and the reversing element extends into the water flow cavity through the first water flow space.

4. The pre-filter according to claim 3, characterized in that: The reversing member also includes a hollow pipe section, the connecting portion, the blocking portion and the hollow pipe section are distributed in sequence along the axial direction, the connecting portion is plug-fitted with the water isolation ring, the blocking portion is plug-fitted with the water distributor, and the hollow pipe section extends into the water passage cavity.

5. The pre-filter according to claim 1, characterized in that: The driving member includes a driving screw, one of the valve head and the reversing member is rotatably connected to the driving screw and is axially fixed, and the other of the valve head and the reversing member is threadedly connected to the driving screw via a screw connection structure.

6. The pre-filter according to claim 5, characterized in that: The screw connection structure is configured as a mounting bracket fixedly arranged in the reversing member, the driving screw is screwed to the mounting bracket, and is rotatably connected to the valve head and fixed in the axial direction.

7. The pre-filter according to claim 6, characterized in that: The mounting bracket comprises an inner ring portion and an outer ring portion which are connected to each other, the driving screw is screwed to the inner ring portion, and the outer ring portion is snap-connected to the reversing member.

8. The pre-filter according to claim 7, characterized in that: The outer ring portion is connected to a plurality of connecting arms extending in the axial direction, the plurality of connecting arms are distributed at intervals in the circumferential direction, the connecting arms are snap-connected to the switching member, the inner ring portion is arranged opposite to the connecting arms, and is connected to the plurality of connecting arms one by one through a plurality of connecting ribs distributed in the circumferential direction.

9. The pre-filter according to claim 5, characterized in that: The driving member further comprises a driving knob, which is fixed to the driving screw and located outside the valve head.

10. The pre-filter according to claim 9, characterized in that: The driving knob is rotatably connected to the valve head and is relatively fixed to the valve head in the axial direction.

11. The pre-filter according to claim 1, characterized in that: The pre-filter also includes a movable part fixedly connected to the reversing part, the water inlet and the water outlet are arranged on one side of the movable part, the sewage outlet is arranged on the other side of the movable part, and the spaces on the opposite sides of the movable part are separated in the filtering mode and connected in the flushing mode.

12. The pre-filter according to claim 1, characterized in that: The filter assembly includes a plurality of filter modules, a water passage cavity is formed inside the filter module, a first water passage and a second water passage are formed on the filter module which are connected to the water passage cavity, a filter element is provided at the second water passage, the filter element is arranged in an annular shape and has an inner ring edge and an outer ring edge, and the outer ring edge is located on one axial side of the inner ring edge, and the plurality of filter modules are connected in sequence along the axial direction.

13. The pre-filter according to claim 12, characterized in that: The filter module includes two support frames distributed along the axial direction, the water passage cavity is formed between the two support frames, each support frame is provided with the filter element, and the inner ring edge and the outer ring edge of two adjacent filter elements are distributed in opposite directions.

14. The pre-filter according to claim 13, characterized in that: The support frame includes an oblique support portion, and the two ends of the oblique support portion are respectively connected to a first ring portion and a second ring portion, the two oblique support portions of the same filter module are connected through the second ring portion, the first water outlet is provided on the inner periphery of the first ring portion, and the second water outlet is provided on the oblique support portion.

15. The pre-filter according to claim 14, characterized in that: Each of the supporting frames is provided with the second ring portion, the two second ring portions of the same filter module are detachably connected, and the first ring portions of two adjacent filter modules are detachably connected.

16. The pre-filter according to claim 12, characterized in that: The pre-filter further comprises an outer frame, which is rotatably sleeved outside the filter assembly. A cleaning brush is arranged on the inner periphery of the outer frame, and the cleaning brush is arranged tilted toward the filter element.

17. The pre-filter according to claim 1, characterized in that: The pre-filter also includes an outer frame, which is rotatably sleeved outside the filter assembly. The outer frame includes a side frame and a bottom plate, and the bottom plate is connected to the side frame and is located away from the valve head.

18. The pre-filter according to claim 17, characterized in that: The outer frame forms a siphon flow channel, the side frame is provided with a siphon hole connected to the siphon flow channel, the chassis is provided with a first discharge port connected to the siphon flow channel, and the first discharge port is connected to the sewage outlet at least in the flushing mode.

19. The pre-filter according to claim 18, characterized in that: An impeller assembly is also provided in the water filter chamber, and the impeller assembly includes a mounting seat and an impeller body rotatably mounted on the mounting seat, the impeller body is coaxially connected to the exoskeleton and fixed in the circumferential direction, and the mounting seat is formed with a first water inlet and a drain that are connected to each other, the first water inlet is connected to the first discharge port, and the drain port is connected to the sewage outlet at least in the flushing mode.

20. The pre-filter according to claim 19, characterized in that The mounting seat is further provided with a second water inlet, wherein the first water inlet is provided on one axial side of the mounting seat, and the second water inlet is provided on a circumferential side of the mounting seat; The chassis is also provided with a second discharge port extending axially therethrough, and a water retaining structure is formed on opposite sides of the exoskeleton and the mounting seat. The water retaining structure is arranged around the first discharge port, and the second discharge port is located at the periphery of the water retaining structure. The second water inlet is connected to the second discharge port.

21. The pre-filter according to claim 1, characterized in that: The pre-filter also includes an exoskeleton, which includes a side frame. The side frame is provided with a water flow driving component, and the water flow driving component has a driving surface. The driving surface is arranged at an angle relative to the circumference of the exoskeleton, so that the driving surface can drive the exoskeleton to rotate after being impacted by the water flow.

22. The pre-filter according to claim 21, characterized in that The water flow driving component includes a hanging part and a driving body, the hanging part is hung on the end of the side frame, the driving body is arranged in a conformal manner with the inner circumferential wall of the side frame, the driving body extends in a circumferential arc along the side frame, and has a plurality of water baffles distributed at intervals, and the driving surface is formed on the water baffles.

23. A water system, characterized in that: Comprising the pre-filter according to any one of claims 1 to 22.

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