Pre-filter and water system

Abstract

The utility model discloses a prefilter and water consuming system relates to filter technical field, wherein prefilter includes valve head, filter flask, filter subassembly and moving part, filter flask forms the water filter cavity, valve head is equipped with the water inlet and water outlet that is communicated with water filter cavity, filter flask is equipped with the drain outlet that is communicated with water filter cavity, filter subassembly is provided in the water filter cavity, and the moving part is equipped with the water inlet and water outlet that is communicated with water filter cavity. The filtering assembly comprises a filtering module, the filtering module comprises a filtering part, at least part of the filtering part is obliquely arranged, the movable part is movably arranged in the water filtering cavity, so that the pre-filter can be switched between a filtering mode and a flushing mode, the water inlet and the water outlet are formed in one side of the movable part, and the sewage draining outlet is formed in the other side of the movable part; the spaces on the two opposite sides of the movable part are separated in the filtering mode and communicated in the flushing mode. According to the technical scheme provided by the utility model, the filtering effect of the filtering assembly is ensured, and the service life of the pre-filter is prolonged.

Description

Technical Field

[0001] The utility model 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, their demands for daily water use are also increasing. Due to long-term disrepair and aging of tap water pipes, a large amount of large particles harmful to the human body, such as mud, rust, and red worms, are present in the water, seriously affecting the health of residents. Therefore, a pre-filter is provided, which is equipped with a filter assembly and other structures inside the pre-filter to filter out large particles before the tap water is used. However, while the pre-filter is filtering the water, impurities will adhere to the water filter cavity, especially the surface of the filter assembly. Over time, this will clog the filter assembly and reduce the filtering effect of the filter assembly. Utility Model Content

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

[0004] To achieve the above-mentioned purpose, 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 the filter bottle is provided with a sewage outlet connected to the water filter cavity on a side away from the valve head;

[0006] a filter assembly disposed in the water filter cavity, the filter assembly comprising a filter module, a water flow cavity being formed therein, a first water flow port being provided in the axial direction of the filter module for communicating with the water flow cavity, a second water flow port being provided in the circumferential direction of the filter module for communicating with the water flow cavity, the filter module comprising a filter element disposed at the second water flow port, the filter element being at least partially inclined; and

[0007] A movable part is movably arranged in the water filter chamber, so that the pre-filter can switch between a filtering mode and a flushing mode. The water inlet and the water outlet are arranged on one side of the movable part, and the sewage outlet is arranged on the other side of the movable part. The spaces on the opposite sides of the movable part are separated in the filtering mode and connected in the flushing mode.

[0008] In one embodiment, the valve head and the filter bottle are connected by fasteners.

[0009] In one embodiment, a first flange is protruded from the outer periphery of the filter bottle, and a second flange is protruded from the outer periphery of the valve head. The first flange and the second flange are in contact with each other and are connected by fasteners.

[0010] 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, and each of the support frames is provided with the second water passage port.

[0011] In one embodiment, the support skeleton 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 inner periphery of the first ring portion is provided with the first water outlet, and the second water outlet is provided on the oblique support portion.

[0012] In one embodiment, the oblique support portion is formed with a plurality of second water outlets distributed at intervals, and the filter module is provided with a filter element corresponding to each support frame, and the filter element is stacked on the surface of the oblique support portion.

[0013] In one embodiment, each of the support 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.

[0014] In one embodiment, the movable part includes a blocking portion, a first flow port is formed in the water filter chamber, a penetration direction of the first flow port is parallel to a penetration direction of the sewage outlet, and the movable part includes a blocking portion, the blocking portion is axially movable relative to the shell, and blocks the first flow port in the filtering mode and opens the first flow port in the flushing mode.

[0015] In one embodiment, a sealing annular surface is provided in the water filter cavity corresponding to the blocking portion, the axial direction of the sealing annular surface is parallel to the penetration direction of the first flow opening, the outer periphery of the blocking portion is sealingly fitted with the sealing annular surface and is movable relative to the sealing annular surface in the axial direction;

[0016] The axial side surface of the blocking portion can be detachably blocked from the first flow opening. The blocking portion is provided with a second flow opening, and the second flow opening and the first flow opening are staggered. In the flushing mode, the two ends of the second flow opening are respectively connected to the spaces on both sides of the axial direction of the blocking portion.

[0017] In one embodiment, a reversing bottom shell is fixedly installed in the water filter chamber, the reversing bottom shell is hollow, the inner circumferential surface of the reversing bottom shell is the sealing ring surface, the blocking portion extends into the inner side of the reversing bottom shell and is slidably connected to the reversing bottom shell.

[0018] In one embodiment, the pre-filter further comprises an exoskeleton, which is rotatably mounted outside the filter assembly. The exoskeleton comprises a side frame and a chassis, and the chassis is connected to the side frame and is located away from the valve head.

[0019] In one embodiment, the outer skeleton is formed with a siphon channel, the side frame is provided with a siphon hole connected to the siphon channel, and 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.

[0020] In one embodiment, an impeller assembly is further 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 water inlet and a drain, and the water inlet includes a first water inlet, and at least in the flushing mode, the first discharge port is connected to the sewage outlet via the first water inlet and the drain port in sequence.

[0021] In one embodiment, the water inlet further includes a second water inlet, 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;

[0022] The chassis is also provided with a second discharge port extending axially therethrough. 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. The second discharge port is located on the outer periphery of the water retaining structure for communicating with the second water inlet.

[0023] In one embodiment, the movable member includes a blocking portion, the blocking portion is located on a side of the outer frame away from the valve head, and the blocking portion can detachably block at least one of the water inlet and the drain outlet;

[0024] In the filtering mode, the blocking portion blocks at least one of the water inlet and the drain outlet; in the flushing mode, both the water inlet and the drain outlet are open.

[0025] In one embodiment, the pre-filter also includes a reversing bottom shell, which is fixedly connected to the mounting seat, the reversing bottom shell and the exoskeleton are respectively located on both axial sides of the mounting seat, and the sealing portion extends into the inner side of the reversing bottom shell and is slidably connected to the reversing bottom shell.

[0026] In one embodiment, the pre-filter also includes a reversing member, which is transmission-connected to the movable member, and the reversing member is hollow. 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. The reversing member can be movably inserted into the filter assembly, 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.

[0027] 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, the connecting portion and the blocking portion are distributed axially, and the reversing member is axially movably inserted into the water isolating ring and the filter assembly.

[0028] In one embodiment, the filter assembly includes a water distributor, which is located at one end of the filter assembly close to the water isolation ring. The water isolation ring and the water distributor together form a water flow structure, and the water flow structure is connected to the water inlet.

[0029] The reversing member further includes a hollow pipe section, the connecting portion, the blocking portion and the hollow pipe section are sequentially distributed along the axial direction, the connecting portion is plugged into the water separator, the blocking portion is plugged into the water distributor, and the hollow pipe section extends into the filter module;

[0030] On adjacent sides of the water distributor and the water isolation ring, the water flow structure is isolated from the connecting portion in the filtering mode and is connected to the connecting portion in the flushing mode.

[0031] In one embodiment, 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. The water distributor and the water isolation ring are axially opposite and spaced apart. In the filtering mode, the axial sides of the baffle are respectively connected to the water distributor and the water isolation ring, and are respectively connected to the first water flow space and the inner circumference of the water isolation ring, and are spaced apart from the second water flow space. In the flushing mode, the connecting portion is at least partially located between the water distributor and the water isolation ring, and the baffle covers the second water flow space.

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

[0033] In the technical solution of the present invention, the movable part moves within the water filter chamber, causing the space on both sides of the movable part to switch between a blocked state and a connected state, thereby switching the pre-filter between a filtration mode and a flushing mode. In the filtration mode, the water outlet is open and the sewage outlet is closed. After entering the water filter chamber, the raw water entering from the water inlet is filtered by the filter assembly and flows to the water outlet. At this time, the movable part is in a position to separate the space on both sides. In the flushing mode, the water outlet is closed and the sewage outlet is open. The water flow entering from the water inlet can flush the filter assembly within the water filter chamber. In this mode, impurities attached to the filter assembly can be cleaned, and then sewage can flow out through the sewage outlet. At this time, the movable part is in a position to connect the space on both sides, so that the water inlet and the sewage outlet can be connected. Therefore, in the technical solution of the present invention, the pre-filter has a flushing mode, which can regularly clean impurities attached to the filter assembly, thereby ensuring the filtration effect of the filter assembly and improving the service life of the pre-filter. Moreover, the movable parts can switch between different positions accordingly, which can effectively ensure the working performance of the pre-filter in different working modes. 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

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

[0036] Figure 2 for Figure 1 Schematic diagram of the internal structure of the valve head;

[0037] Figure 3 This is a schematic cross-sectional view of an embodiment of the pre-filter provided by the present invention in filtering mode;

[0038] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0039] Figure 5 for Figure 3 A partial enlarged view of point B in the middle;

[0040] Figure 6 for Figure 3 A partial enlarged view of point C in the middle;

[0041] Figure 7This is a schematic cross-sectional view of an embodiment of the pre-filter provided by the present invention in filtering mode;

[0042] Figure 8 for Figure 7 A partial enlarged view of point D in the middle;

[0043] Figure 9 for Figure 7 A partial enlarged view of point E in the middle;

[0044] Figure 10 A structural diagram of an embodiment of a movable part of a pre-filter provided by the present utility model;

[0045] Figure 11 for Figure 10 A schematic diagram of the structure of the moving parts from another perspective;

[0046] Figure 12 A structural diagram of an embodiment of a reversing member of a pre-filter provided by the present utility model;

[0047] Figure 13 A schematic structural diagram of an embodiment of a filter assembly of a pre-filter provided by the present invention;

[0048] Figure 14 for Figure 13 Schematic diagram of the exploded structure of an embodiment of the filtering module in FIG.

[0049] Figure 15 for Figure 13 A schematic diagram of the connection structure of two filter modules in an embodiment;

[0050] Figure 16 for Figure 13 A schematic diagram of the connection structure of the two filter modules in another embodiment;

[0051] Figure 17 This is a structural diagram of an embodiment of the exoskeleton of the pre-filter provided by the present invention;

[0052] Figure 18 for Figure 17 A schematic diagram of the structure of the exoskeleton from another perspective;

[0053] Figure 19 This is a structural schematic diagram of an embodiment of an impeller assembly of a pre-filter provided by the present utility model;

[0054] Figure 20 for Figure 19 A schematic diagram of the structure of the impeller assembly from another perspective;

[0055] Figure 21 for Figure 19A schematic structural diagram of an impeller body of an impeller assembly according to an embodiment of the present invention;

[0056] Figure 22 This is a partial structural cross-sectional view of an embodiment of the pre-filter provided by the utility model.

[0057] Description of Figure Numbers:

[0058] 10. Filter bottle; 101. Water filter chamber; 102. Sewage outlet; 104. First flow outlet; 110. First flange;

[0059] 20. Valve head; 21. Metal shell; 22. Plastic lining; 201. Water inlet; 202. Water outlet; 210. Water isolation ring; 220. Second flange;

[0060] 30. Filter assembly; 300. Filter module; 301. First connection structure; 302. Second connection structure;

[0061] 310, support frame; 311, oblique support portion; 312, first ring portion; 313, second ring portion; 320, filter element; 330, first water outlet; 340, water passage cavity; 350, second water outlet;

[0062] 40. Impeller assembly; 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; 501, siphon flow channel; 503, first discharge port; 504, second discharge port;

[0065] 511, chassis; 512, side frame; 513, first protrusion; 514, water retaining ring; 531, siphon hole;

[0066] 60. Water distributor; 610. First water flow space; 620. Second water flow space; 621. Guide vane;

[0067] 710, reversing bottom shell; 711, sealing ring surface;

[0068] 720, reversing member; 721, connecting portion; 722, baffle portion; 7221, annular main body; 7222, baffle skirt; 723, hollow pipe section;

[0069] 730, movable part; 731, blocking portion; 7311, second flow port; 732, connecting portion;

[0070] 1001. Fastener; 1002. Sealing ring; 1003. Elastic part.

[0071] 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

[0072] 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 embodiments described 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 making any creative work are within the scope of protection of the present invention.

[0073] 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 indications will also change accordingly.

[0074] 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 for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0075] Water systems, such as whole-house water purification systems, typically feature a pre-filter to remove large particles from tap water. This not only ensures water safety but also extends the life of appliances, prevents clogged household water pipes, and improves residents' health. The pre-filter is the first coarse filtration device in a whole-house water purification system and is a physical filtration device used to protect back-end water safety.

[0076] The utility model proposes a pre-filter, which has a filtering mode and a flushing mode. In the filtering mode, the pre-filter can filter large particulate matter before the water end. In the flushing mode, the pre-filter can clean the filter components inside it to discharge the large particulate matter previously intercepted, thereby eliminating the need for manual disassembly and cleaning of the pre-filter, thereby increasing the service life of the pre-filter.

[0077] See also Figures 1 to 3 In 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.

[0078] The water inlet 201 is connected to the water supply end of the water supply system, and the water outlet 202 is connected to the water consumption end of the water supply system, thereby filtering the raw water flowing from the water supply end to the water consumption end. It should be noted that the water supply end can be a tap, water tower, or well water, and the water consumption end can be a faucet, shower, or drinking water outlet, which is not specifically limited in this application.

[0079] The valve head 20 and the filter bottle 10 can be connected by a threaded connection. For example, the valve head 20 may be provided with an externally threaded tube, and the mouth of the filter bottle 10 may be provided with corresponding internal threads for threading the externally threaded tube. To reduce the difficulty of pre-filter production and the requirements for assembly test results, as well as to 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 1001.

[0080] Specifically, the outer periphery of the filter bottle 10 is provided with a first flange 110, and the outer periphery of the valve head 20 is provided with a second flange 220. The first flange 110 and the second flange 220 are in contact with each other and connected by a fastener 1001. It is understood that both the first flange 110 and the second flange 220 are provided with through-holes for the fastener 1001 to pass through. The fastener 1001 can be a bolt, which, through the threaded engagement of the bolt and the through-hole, achieves locking of the first flange 110 and the second flange 220; the fastener 1001 can also be a bolt and nut assembly, where the bolt passes through the through-hole and is locked with the nut; the fastener 1001 can also be a pin and a shaft assembly, where the pin passes through the through-hole and the shaft passes through the pin, achieving locking of the first flange 110 and the second flange 220.

[0081] The valve head 20 comprises a connected metal outer shell 21 and a plastic inner lining 22. The water inlet 201 and the water outlet 202 are both formed in the plastic inner lining 22. The second flange 220 is formed on the metal outer shell 21. This ensures that water flowing through the pre-filter directly contacts the plastic inner lining 22, rather than the metal outer shell 21. This prevents water contamination by metal elements precipitated from the metal outer shell 21, while also enhancing the pre-filter's aesthetics and housing strength. In other embodiments, the valve head 20 can also be configured directly as a metal component.

[0082] The materials of the metal shell portion 21 and the plastic lining portion 22 are not specifically limited in this application. For example, the material of the metal shell portion 21 can be a copper alloy, such as brass, and the material of the plastic lining portion 22 can be PP (polypropylene) or PVC (polyvinyl chloride).

[0083] The pre-filter also includes a filter assembly 30 disposed within the water filter chamber 101. After raw water (e.g., tap water or well water) flows from an external water source into the water inlet 201, 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. This provides better protection for water purifiers, washing machines, showers, high-end faucets, downstream pipelines, etc., reducing the risk of damage to these devices due to impurity blockage. The form and structure of the filter assembly 30 are not limited. The filter assembly 30 can be equipped with a stainless steel filter mesh or a PP cotton filter mesh to filter impurities.

[0084] 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.

[0085] In one embodiment, please refer to Figures 13 to 16The filter assembly 30 includes a filter module 300, and a water flow cavity 340 is formed inside the filter module 300. A first water flow port 330 communicating with the water flow cavity 340 is provided in the axial direction of the filter module 300, and a second water flow port 350 communicating with the water flow cavity 340 is provided in the circumferential direction of the filter module 300. The filter module 300 includes a filter element 320 provided at the second water flow port 350, and the filter element 320 is at least partially inclined. It can be understood that in the filtering mode, the raw water will enter the water flow chamber 340 through the second water flow outlet 350 on the peripheral side of the filter module 300, so that the impurities in the raw water can be filtered by the filter element 320, and finally the clean water flows from the first water flow outlet 330 on the axial side of the filter module 300 to the water outlet 202. Since the filter element 320 is at least partially inclined, the filtering area of ​​the filter element 320 can be increased at the same axial height, which means that at the same flow rate, the filter element 320 of this solution can withstand a larger flow load and improve the filtering efficiency. Moreover, since the filtering area of ​​the filter element 320 of this solution is large enough, even if a local area of ​​the filter element 320 is blocked, 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, reduce the replacement frequency, and thus reduce maintenance costs.

[0086] It can be understood that in the filtration flow path of the pre-filter, the second water inlet 350, the water passage cavity 340, and the first water inlet 330 are sequentially arranged along the upstream and downstream sides. That is, when the pre-filter is in filtration mode, water entering from the water inlet 201 will flow through the second water inlet 350, the water passage cavity 340, and the first water inlet 330 in sequence to the water outlet 202. In other words, the water will flow from the outside of the filter module 300 to the inside of the filter module 300. However, when the pre-filter is in flushing mode, since the pre-filter is a backwash type, the flow direction of the water in the filter module 300 will change, flowing from the inside of the filter module 300 to the outside of the filter module 300. In other words, the water will flow from the water passage cavity 340 through the second water inlet 350 to the water passage cavity 101 on the outer peripheral side of the filter module.

[0087] Without loss of generality, the filter element 320 is annular and has an inner and outer ring edges, with the outer ring edge located axially to one side of the inner ring edge. That is, the inner and outer ring edges are not at the same height in the axial direction, so that the filter element 320 maintains an inclined shape in the circumferential direction. This can further increase the filtration area of ​​the filter element 320, further improve the flow load that the filter element 320 can withstand, and improve the filtration efficiency.

[0088] In one embodiment, if Figure 13As shown, the filter assembly 30 includes a plurality of filter modules 300. The provision of multiple filter modules 300 enhances the modularity of the filter assembly 30. The number of 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), thereby achieving the effect of adjusting the size of the filter assembly 30, thereby solving the problem of sharing the filter assembly 30 of pre-filters of different models. Since the filtration area on each filter module 300 is fixed, by adjusting the number of filter modules 300, the total filtration area of ​​the filter assembly 30 can also be adjusted, thereby enabling the appropriate filtration area to be set, thereby achieving the effect of improving the filtration effect.

[0089] Furthermore, the outer side surface of the filter element 320 is configured as a conical surface. The conical surface design facilitates uniform distribution and smooth flow of the fluid, reduces eddy currents and turbulence within 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 be a concave arc that is concave toward the inside of the water chamber 340, or the generatrix of the conical surface can be a convex arc that is convex toward the outside of the water chamber 340. In other embodiments, the outer side surface of the filter element 320 can also be a pyramidal surface with a polygonal cross-section, thereby increasing the filtration area of ​​the filter element 320.

[0090] In one embodiment, if Figure 14 As shown, the filter assembly 30 further includes a water distributor 60 , which is axially connected to the filter module 300 . Specifically, when multiple filter modules 300 are provided, the water distributor 60 is connected to a filter module 300 that is closer to the valve head 20 .

[0091] In one embodiment, see Figure 14 and Figure 15 A first connecting structure 301 and a second connecting structure 302 are respectively provided on both axial sides of the filter module 300. The first connecting structure 301 of one filter module 300 is used to detachably connect with the second connecting structure 302 of the other filter module 300, thereby fixing the two filter modules 300. At least one of the first connecting structure 301 and the second connecting structure 302 can be detachably connected to the water distributor 60. In other words, the structure for detachably connecting the two filter modules 300 is also used for detachably connecting with the water distributor 60. In this way, the modularity of the filter assembly 30 can be improved, and the assembly of the various structures of the filter assembly 30 can be facilitated.

[0092] Among them, it can be that one of the first connecting structure 301 and the second connecting structure 302 is set as a convexity and the other is set as a groove, and the water distributor 60 is correspondingly provided with a convexity or a groove. Of course, it can also be that one of the first connecting structure 301 and the second connecting structure 302 is set as a hook and the other is set as a hook groove, and the water distributor 60 is correspondingly provided with a hook or a hook groove.

[0093] Specifically, the filter module 300 may be provided with a latching protrusion on the side close to the water distributor 60 and a latching groove on the side away from the water distributor 60, and the water distributor 60 may be provided with a latching groove on the side close to the filter module 300. In this way, the water distributor 60 and the filter module 300 as well as the two adjacent filter modules 300 can be detachably connected through the cooperation of the latching protrusion and the latching groove, and the same applies to the cooperation of the hook groove and the latching hook.

[0094] In one embodiment, please refer to Figures 13 to 16 The filter module 300 includes two axially distributed support frames 310, with the water passage chamber 340 formed between the two support frames 310. Each support frame 310 is provided with a filter element 320, and the inner and outer annular edges of two adjacent filter elements 320 are arranged in opposite directions. It can be understood that, given a constant radial space within the water filter chamber 101, compared to a filter module 300 that maintains a tapered shape in one direction, a filter element 320 in the same filter module 300 that tapers in opposite directions can achieve a larger filtration area. In this way, this embodiment fully utilizes the space within the water filter chamber 101, creating a larger filtration area around the filter module 300, ensuring that the filter assembly 30 can withstand a greater flow load and improving filtration efficiency. At the same time, a sufficiently large water passage chamber 340 can be formed within the two support frames 310 to facilitate water flow. 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 .

[0095] In one embodiment, the support frame 310 includes an oblique support portion 311, with a first ring portion 312 and a second ring portion 313 connected to each end of the oblique support portion 311. The two oblique support portions 311 of the same filter module 300 are connected by the second ring portion 313. The first water outlet 330 is provided on the inner periphery of the first ring portion 312, and the second water outlet 350 is provided on the oblique support portion 311. This ensures the structural strength of the support frame 310 and the connection strength between the two support frames 310, thereby maintaining the filtration capacity of the filter assembly 30. Of course, in other embodiments, the support frame 310 can also be configured as other structural forms.

[0096] 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 inclined support portion 311 can provide sufficient support to the filter element 320, and the total flow area of ​​the second water outlet 350 is large, so that the filter module 300 has sufficient flow capacity.

[0097] Without loss of generality, the outer diameter of the second ring portion 313 is larger than the outer diameter of the first ring portion 312. Thus, each filter element 320 alternately tapers in the upper and lower directions, making fuller use of the space within the water filter cavity 101 to provide a larger filtration area, thereby further improving the filtration efficiency of the filter assembly 30. Of course, in other embodiments, the outer diameter of the first ring portion 312 may be larger than the outer diameter of the second ring portion 313, or there may be no fixed size relationship between the diameters of the first ring portion 312 and the second ring portion 313.

[0098] In one embodiment, each support frame 310 is provided with a second ring portion 313, and the two second ring portions 313 of the same filter module 300 are detachably connected. It will be appreciated that a detachable connection allows for easy separation of components without damaging the connected components or adjacent components. This feature allows for quick and efficient maintenance or replacement of the support frame 310 of the filter module 300, reducing maintenance effort and costs. The ease of detachable connection significantly saves time when maintaining or replacing the support frame 310 of the filter module 300. Furthermore, the detachable connection allows for quick replacement of faulty support frames 310, thereby reducing water system outage time and improving maintenance efficiency. Furthermore, compared to non-detachable connections, detachable connections reduce the likelihood of entire components being scrapped due to inability to disassemble, thus reducing resource waste. Furthermore, the detachable connection allows for regular or irregular inspection and maintenance of the filter assembly 300 to ensure its stability and safety, helping to promptly identify and address potential safety hazards.

[0099] Furthermore, in some possible connection methods, the two second ring portions 313 are snap-connected. It can be understood that when the second ring portion 313 is made of plastic or metal, the snap-connecting structure can be directly molded 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-connecting 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-connection 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-connecting structure can be a combination of a hook and a hook groove, or a combination of a protrusion 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 high tensile and compressive strength, 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.

[0100] 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 through the two second ring portions 313, and the water flow 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 while the water flow cavity 340 is sealed, which is beneficial to saving processing steps and improving production efficiency.

[0101] In one embodiment, the first ring portions 312 of two adjacent filter modules 300 are detachably connected. The specific method of detachably connecting the two first ring portions 312 can refer to the connection method of the two second ring portions 313, and the connection method between the water distributor 60 and the filter module 300 can also refer to the connection method between the two second ring portions 313. In this way, modular assembly between different filter modules 300 can be facilitated. Furthermore, the end faces of the first ring portions 312 of the two adjacent filter modules 300 are abutted against each other, so that while the connection of the two adjacent filter modules 300 is achieved, the first water outlets 330 of the two adjacent filter modules 300 can be connected, thereby saving processing steps and improving production efficiency.

[0102] In one embodiment, if Figure 13As shown, the water distributor 60 has a first water flow space 610 corresponding to the first water flow port 330 and a second water flow space 620 corresponding to the second water flow port 350. The second water flow space 620 is provided with guide vanes 621. In other words, the filtration flow path between the water inlet 201 and the outer periphery of the filter module 300 can be connected through the second water flow space 620, and the filtration flow path between the inner periphery of the filter module 300 and the water outlet 202 can be connected through the first water flow space 610. Furthermore, water flowing through the second water flow space 620 into the water filter chamber 101 can form a vortex, which disturbs the water flow and prevents impurity deposition.

[0103] In one embodiment, please refer to Figure 3 、 Figure 6 、 Figure 7 and Figure 9 The pre-filter also includes a movable part 730, which is movably arranged in the water filter chamber 101, so that the pre-filter can switch between the filtering mode and the flushing mode. The water inlet 201 and the water outlet 202 are arranged on one side of the movable part 730, and the sewage outlet 102 is arranged on the other side of the movable part 730. The spaces on the opposite sides of the movable part 730 are separated in the filtering mode and connected in the flushing mode.

[0104] In the technical solution of the present utility model, the movable part 730 moves in the water filter chamber 101, so that the space on both sides of the movable part 730 switches between the blocked state and the connected state, thereby switching the pre-filter between the filtering mode and the flushing mode.

[0105] In the filtering mode, the water outlet 202 is opened and the sewage outlet 102 is closed. The raw water entering from the water inlet 201 enters the water filter chamber 101, is filtered by the filter component 30, and then flows to the water outlet 202. At this time, the movable part 730 is in a position to separate the space on both sides; in the flushing mode, the water outlet 202 is closed and the sewage outlet 102 is opened. The water flow entering from the water inlet 201 can flush the filter component 30 in the water filter chamber 101. In this mode, impurities attached to the filter component 30 can be cleaned, and then the sewage can flow out through the sewage outlet 102. At this time, the movable part 730 is in a position to connect the space on both sides, so that the water inlet 201 and the sewage outlet 102 can be connected.

[0106] When the pre-filter is in filtering mode, the water inlet 201 , the water outlet 202 and the filter assembly 30 can be relatively concentratedly distributed on the same side of the movable part 730 , so that the raw water can be filtered through the filter assembly 30 more efficiently.

[0107] Without loss of generality, when the pre-filter switches from filtering mode to flushing mode, that is, when the water outlet 202 is closed and the sewage outlet 102 is opened, a pressure difference is generated in the space on both sides of the movable member 730. This pressure difference causes the movable member 730 to move, thereby moving to a position where the space on both sides of the movable member 730 is connected, thereby connecting the flushing flow path between the water inlet 201 and the sewage outlet 102. Of course, in other embodiments, the position of the movable member 730 can be changed by other driving methods, for example, by manually turning a screw to drive the movable member 730 to move.

[0108] In the present invention, the pre-filter has a flushing mode that regularly cleans impurities adhering to the filter assembly 30, thereby ensuring the filtration efficiency of the filter assembly 30 and extending the service life of the pre-filter. Furthermore, the movable member 730 switches between different positions, effectively ensuring the performance of the pre-filter in different operating modes.

[0109] In one embodiment, please refer to Figure 3 、 Figure 6 、 Figure 7 and Figure 9 A first flow port 104 is formed in the water filter chamber 101. The penetration direction of the first flow port 104 is parallel to the penetration direction of the sewage outlet 102. The movable part 730 includes a blocking portion 731. The blocking portion 731 is axially movable relative to the shell, and blocks the first flow port 104 in the filtering mode and opens the first flow port 104 in the flushing mode.

[0110] It can be understood that parallel means parallel or approximately parallel. In this way, the movement direction of the blocking portion 731 will be parallel to the distribution direction of the water inlet 201 and the sewage outlet 102, and the direction of the force of the pressure difference on the blocking portion 731 can also be parallel to the movement direction, which can more reliably drive the blocking portion 731. In addition, the penetration direction of the first flow port 104 and the movement direction of the movable part 730 are correspondingly set to the same direction, which can facilitate the layout of various structures in the water filter chamber 101 and enhance the structural symmetry of the pre-filter, thereby ensuring the water pressure stability of the pre-filter in the water filter chamber 101, so as to ensure the working stability of the pre-filter.

[0111] Of course, in other embodiments, the setting mode of the first flow port 104 and the movement direction of the movable part 730 can also be adaptively adjusted to other directions, or, when the penetration direction of the first flow port 104 is parallel to the penetration direction of the sewage outlet 102, the movable part 730 can also be rotatably set, and a through hole eccentric to the rotation axis is set on the blocking part 731. At this time, the movable part 730 can be driven to rotate so that the through hole is opposite to the first flow port 104 or staggered with the first flow port 104. When the two are opposite, the first flow port 104 can be opened, and when the two are staggered, the blocking part 731 blocks the first flow port 104.

[0112] Without loss of generality, please refer to Figure 3 、 Figure 6 、 Figure 7 and Figure 9 The first flow opening 104 is located between the water inlet 201 and the sewage outlet 102, specifically, between the filter assembly 30 and the sewage outlet 102. The blocking portion 731 can be located on the side of the first flow opening 104 close to the filter assembly 30, or on the side of the first flow opening 104 close to the sewage outlet 102. Of course, in other embodiments, the sewage outlet 102 can also serve as the first flow opening 104.

[0113] In one embodiment, please refer to Figure 3 、 Figure 6 、 Figure 7 、 Figures 9 to 11 A sealing ring surface 711 is provided in the water filter chamber 101 corresponding to the sealing portion 731. The axial direction of the sealing ring surface 711 is parallel to the penetration direction of the first flow port 104. The outer peripheral seal of the sealing portion 731 is fitted with the sealing ring surface 711 and can move axially relative to the sealing ring surface 711; the axial side surface of the sealing portion 731 can be detachably sealed on the first flow port 104, and the sealing portion 731 is provided with a second flow port 7311. The second flow port 7311 and the first flow port 104 are staggered. In the flushing mode, the two ends of the second flow port 7311 are respectively connected to the space on both sides of the axial direction of the sealing portion 731.

[0114] That is, when the blocking portion 731 blocks the first flow port 104 through the physical structure surrounding the second flow port 7311, the physical structure surrounding the first flow port 104 can block the second flow port 7311, thereby isolating the space on both sides of the movable member 730. When the blocking portion 731 is separated from the first flow port 104, the spaces on both axial sides of the first flow port 104 and the second flow port 7311 are connected, allowing the water inlet 201 to be connected to the sewage outlet 102 through the first flow port 104 and the second flow port 7311. In addition, during the movement of the movable member 730, the outer periphery of the blocking portion 731 always maintains a sealed fit with the sealing annular surface 711. In the filtering mode, this helps to ensure the isolation of the space on both sides of the movable member 730 and prevent water from seeping from the side where the water inlet 201 is located to the side where the sewage outlet 102 is located, thereby affecting the filtering process of the pre-filter. Furthermore, the sealing annular surface 711 can provide guidance for the movement of the blocking portion 731 to ensure that the blocking portion 731 switches smoothly between different positions.

[0115] Of course, in other embodiments, the outer periphery of the blocking portion 731 may be fitted with a gap between other structures in the water filter chamber 101, and no flow structure may be provided on the blocking portion 731. When the blocking portion 731 leaves the first flow port 104, water flows through the gap between the outer periphery of the blocking portion 731 and other structures. The blocking portion 731 may be provided with a sealing structure corresponding to the first flow port 104 to ensure the sealing effect and the partition effect on the spaces on both sides.

[0116] Further, please refer to Figure 3 、 Figure 6 、 Figure 7 and Figure 9 The outer periphery of the blocking portion 731 is provided with a sealing member, and the inner periphery and outer periphery of the sealing member are respectively in contact with the blocking portion 731 and the sealing ring surface 711. Without loss of generality, the sealing member is configured as a sealing ring 1002. In this way, the blocking portion 731 can achieve a sealing fit between the outer periphery and the sealing ring surface 711 through the sealing ring 1002. The sealing ring 1002 can be filled between the outer periphery of the blocking portion 731 and the sealing ring surface 711 in an interference fit, but the interference should not be too high to ensure that the blocking portion 731 can move relatively smoothly along the sealing ring surface 711. Of course, in other embodiments, the outer periphery of the blocking portion 731 can also be formed with an elastic deformation portion, and the elastic deformation portion and the sealing ring surface 711 are sealed together.

[0117] In one embodiment, if Figure 20As shown, there are multiple first flow openings 104 spaced apart along the circumference of the water filter chamber 101. The term "multiple" refers to more than two, that is, more than two first flow openings 104 are spaced apart in the circumferential direction. This effectively increases the range of the flow area. The multiple first flow openings 104 should be distributed around the central axis of the water filter chamber 101 so that the flow area is relatively concentrated. In other words, a relatively concentrated flow area with a certain coverage can be formed within the water filter chamber 101, which is conducive to ensuring smooth flow of water through the first flow openings 104. Of course, in other embodiments, only one first flow opening 104 may be provided, and the blocking portion 731 may cover the end side of the first flow opening 104, or the blocking portion 731 may enter the first flow opening 104 and seal the first flow opening 104 through the sealing ring 1002 provided on the outer circumference and the inner circumference of the first flow opening 104.

[0118] In one embodiment, if Figure 10 and Figure 11 As shown, there are multiple second flow openings 7311 distributed at intervals along the circumference of the water filter chamber 101. That is, two or more second flow openings 7311 are distributed at intervals along the circumferential direction on the blocking portion 731. In this way, the range of the flow area can be effectively increased. The multiple second flow openings 7311 should be distributed around the center of the blocking portion 731 so that the flow area is relatively concentrated. In other words, a relatively concentrated flow area with a certain amount of coverage can be formed on the blocking portion 731, which is conducive to ensuring that water flows smoothly through the second flow openings 7311. In addition, there is no need to open a second flow opening 7311 with a large area on the blocking portion 731, which is conducive to ensuring the structural strength of the blocking portion 731. Furthermore, the multiple second flow openings 7311 can be evenly distributed around the center of the blocking portion 731 to improve the flow uniformity of the blocking portion 731. Without loss of generality, the two second flow openings 7311 are evenly spaced around the center of the blocking portion 731. That is, the two second flow openings 7311 are relatively distributed on either side of the center of the blocking portion 731 in the same radial direction of the blocking portion 731. Of course, in other embodiments, only one second flow opening 7311 may be provided.

[0119] In one embodiment, the first flow opening 104 and the second flow opening 7311 are staggered in the circumferential direction and / or radial direction of the water filter chamber 101. That is, the first flow opening 104 and the second flow opening 7311 are staggered in at least one of the circumferential direction and radial direction of the water filter chamber 101. In this way, when the blocking portion 731 blocks the first flow opening 104, the second flow opening 7311 will not be opposite to the first flow opening 104, and the water inlet 201 and the sewage outlet 102 can be separated. When the blocking portion 731 is separated from the first flow opening 104, the water inlet 201 and the sewage outlet 102 can be connected through the first flow opening 104 and the second flow opening 7311. In particular, when the first flow opening 104 and the second flow opening 7311 are staggered in both the circumferential and radial directions, the path of water flowing from the first flow opening 104 to the second flow opening 7311 can be extended, thereby providing a buffering effect and preventing the water from flowing too quickly.

[0120] In one embodiment, a plurality of the first flow openings 104 and the second flow openings 7311 are spaced apart along the circumference of the water filter chamber 101, and the plurality of the first flow openings 104 and the plurality of the second flow openings 7311 are staggered in both the circumferential and radial directions of the water filter chamber 101. Specifically, when the blocking portion 731 blocks the first flow opening 104, the first flow opening 104 and the second flow opening 7311 are axially offset, and a second flow opening 7311 is circumferentially positioned between two adjacent second flow openings 7311. In addition, if the flow area of ​​a single first flow opening 104 is larger than the flow area of ​​a single second flow opening 7311, the number of first flow openings 104 can be adaptively set to be greater than the number of second flow openings 7311, so that the flow capacity of multiple first flow openings 104 and multiple second flow openings 7311 is equivalent, thereby ensuring the smooth flow of water to the sewage outlet 102.

[0121] In one embodiment, see Figure 3 and Figure 7 , 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 adhering 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, and thus ensuring the filtering effect of the filter assembly 30. In this embodiment, the exoskeleton 50 includes a side frame 512 and a chassis 511. The chassis 511 is connected to the side frame 512 and is located on the side away from the valve head 20. It has strong structural stability and high rotation stability. Of course, in other embodiments, the exoskeleton 50 may only include the side frame 512 structure.

[0122] In one embodiment, please refer to Figure 3 、 Figure 7 、 Figure 17 and Figure 22 The exoskeleton 50 is formed with a siphon channel 501, the side frames 512 are provided with siphon holes 531 communicating with the siphon channel 501, and the base 511 is provided with a first discharge port 503 communicating with the siphon channel 501. The first discharge port 503 is connected to the sewage outlet 102 at least in the flushing mode. By providing the siphon channel 501 and siphon holes 531 on the exoskeleton 50, the present invention's technical solution allows impurities and particulate matter intercepted by the filter assembly 30 to be dislodged by the impact of the water flow and then drawn into the siphon holes 531 and siphon channel 501 by the siphon effect, and then more efficiently discharged through the first discharge port 503 to the sewage outlet 102. In other words, in the flushing mode, impurities and particulate matter intercepted by the filter assembly 30 can be more quickly and effectively directed to the sewage outlet 102, where they are ultimately discharged, thereby improving the flushing effect on the water filter chamber 101, and particularly the filter assembly 30.

[0123] In one embodiment, please refer to Figure 3 、 Figure 5 、 Figure 7 、 Figure 9 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 water inlet and a drain port 404. The water inlet includes a first water inlet 402. At least in the flushing mode, the first discharge port 503 is connected to the sewage outlet 102 via the first water inlet 402 and the drain port 404 in sequence.

[0124] During the pre-filter flushing phase (i.e., when the drain valve is open), water enters through the water inlet of the impeller assembly 40. Impeller body 440 rotates under the impact of the water flow. This rotational motion creates a vortex effect, causing the water flow to more intensely agitate within the filter bottle 10, thereby more effectively removing impurities and dirt adhering to the filter media surface. Compared to static water flow, the dynamic cleaning of impeller assembly 40 can significantly improve the efficiency and effectiveness of flushing. Furthermore, the rotational motion of impeller body 440 stirs up impurities and dirt within the filter bottle 10, suspending them in the water. These impurities are then discharged from the filter bottle 10 through the drain valve and drain port 102 with the water flow, preventing them from redepositing on the filter media and ensuring a thorough flushing process. Furthermore, by enhancing the flushing effect, impeller assembly 40 effectively prevents clogging of the filter media, maintaining unimpeded water flow, and preserving the filtration efficiency of the pre-filter. This is crucial for maintaining stable water pressure and clean water quality in home or commercial systems.

[0125] 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.

[0126] By installing an impeller assembly 40 in the sewage system and utilizing the power of the water flow to drive the impeller body 440 to rotate, not only can the flushing and stirring effects of the water flow be enhanced, thereby improving sewage discharge efficiency and cleanliness, but the impeller assembly 40 can also be relatively simple in design, cost-effective, and require no additional energy consumption, thereby helping to reduce overall operating costs and minimize water waste.

[0127] Furthermore, the outer frame 50 is in transmission connection with 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 .

[0128] There are many structural forms for achieving transmission connection between the outer frame 50 and the impeller body 440. For example, the impeller body 440 and the outer frame 50 are coaxially connected and fixed in the circumferential direction, that is, the rotation axis of the impeller body 440 and the outer frame 50 remains fixed in the circumferential direction. Figure 18 and Figure 19 , the side of the exoskeleton 50 facing the mounting seat 410 may have a plurality of first protrusions 513 distributed along the circumference, and the end of the impeller shaft 441 close to the exoskeleton 50 may have a plurality of second protrusions 443 provided thereon. The plurality of second protrusions 443 are distributed along the circumference of the impeller shaft 441, and a first protrusion 513 is interposed between two adjacent second protrusions 443. Without loss of generality, the connecting portion 732 of the movable member 730 is provided through the mounting seat 410, the impeller body 440, and the exoskeleton 50, and the first protrusions 513 and the second protrusions 443 are also engaged on the outer circumference of the movable member 730. In this way, the rotation of the exoskeleton 50 and the rotation of the impeller body 440 can promote each other to ensure the turbulence effect of the exoskeleton 50 and the impeller body 440, thereby preventing the deposition of impurities.

[0129] See also Figure 18 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.

[0130] In one embodiment, see Figure 19The water inlet also includes 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 disposed on the impeller shaft 441. The water flow 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 first water inlet 402 and the second water inlet 403 increase the flow path and flow rate of water entering the mounting seat 410. The provision of multiple water inlets can form a more complex flow pattern within the impeller chamber, providing sufficient power for the rotation of the impeller body 440.

[0131] See also Figure 21 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, part of the arc surface faces the first water inlet 402, and the other part faces the second water inlet 403, so that the impeller blade 442 can be affected by the water flow from the second water inlet 403 on the side and the first water inlet 402 on the top and drive the impeller shaft 441 to rotate.

[0132] Sewage enters the impeller chamber through the first and second water inlets 402, 403. The interaction with the rotating impeller body 440 generates a rotational force and a stirring effect, helping to flush out impurities remaining within the filter assembly 30. The rotating impeller body 440 not only enhances the rotational force and stirring effect of the water flow, but also, through its uniquely designed impeller blades 442, directs the water flow toward the drain outlet 102, improving drainage efficiency and cleanliness. The drain outlet 404 is located at the bottom or side of the mounting base 410 (typically opposite the drain outlet 102) to facilitate the removal of sewage.

[0133] In one embodiment, see Figure 18 The chassis 511 is also provided with a second discharge port 504 extending axially therethrough. 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 504 is located on the outer periphery of the water retaining structure for communicating with the second water inlet 403.

[0134] For more details, please refer to Figure 18 and Figure 19The 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 on the inner periphery of the water retaining structure, and the filter cavity 101 on the outer periphery of the filter assembly 30 is connected to the second water inlet 403 on the outer periphery of the water retaining structure through the second discharge port 504. Furthermore, the mounting seat 410 is provided with second water inlets 403 on both opposite sides. When discharging sewage, 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 top of the mounting seat 410. The water flowing out of the siphon flow channel 501 enters the impeller cavity through the first water inlet 402.

[0135] In one embodiment, please refer to Figure 3 、 Figure 5 、 Figure 7 and Figure 9 The blocking portion 731 is located on a side of the exoskeleton 50 away from the valve head 20, and the blocking portion 731 can detachably block at least one of the water inlet and the drain outlet 404; in the filtering mode, the blocking portion 731 blocks at least one of the water inlet and the drain outlet 404; in the flushing mode, the water inlet and the drain outlet 404 are both open.

[0136] It can be understood that at least one of the drain port 404 and the water inlet is the first flow opening 104. The blocking portion 731 can be located on the inner side of the mounting seat 410. In this case, in the flushing mode, water flowing from the water inlet into the mounting seat 410 will first pass through the second flow opening 7311 on the blocking portion 731, and then flow out of the mounting seat 410 through the drain port 404. The mounting seat 410 can also be located on the outer side of the mounting seat 410. In this case, the second flow opening 7311 can be located upstream of the water inlet or downstream of the drain port 404. In addition, the blocking portion 731 can be provided corresponding to one of the water inlet and the drain port 404 to detachably block one of the water inlet and the drain port 404, or it can be capable of simultaneously blocking the water inlet and the drain port 404 and can move relative to the mounting seat 410 to a position where the water inlet and the drain port 404 are simultaneously opened.

[0137] When the blocking portion 731 blocks the first flow port 104 through the physical structure around the second flow port 7311, the physical structure around the first flow port 104 on the mounting seat 410 can block the second flow port 7311, thereby isolating the space on both sides of the axial direction of the blocking portion 731. When the blocking portion 731 is separated from the first flow port 104, the space on both sides of the axial direction of the first flow port 104 and the second flow port 7311 are connected, so that the water inlet 201 can be connected to the sewage outlet 102 through the first flow port 104 and the second flow port 7311.

[0138] In the flushing mode, the water inlet and the drain outlet 404 on the mounting seat 410 are both in an open state, and the water in the water filter chamber 101 can enter the mounting seat 410, thereby driving the impeller body 440 to rotate. Since the exoskeleton 50 and the impeller body 440 are fixedly connected in the circumferential direction, a driving force can be provided for the rotation of the exoskeleton 50. The rotation of the exoskeleton 50 can disturb the water flow in the water filter chamber 101, prevent impurities from being deposited and attached to the filter component 30, the exoskeleton 50 and the side walls of the water filter chamber 101, reduce the possibility of blockage of the filter component 30, and thus ensure the filtering effect of the filter component 30.

[0139] In one embodiment, please refer to Figure 3 、 Figure 5 、 Figure 7 and Figure 9 The pre-filter further includes a reversing bottom shell 710, and the blocking portion 731 extends into the inner side of the reversing bottom shell 710 and is slidably connected to the reversing bottom shell 710. It is understood that the reversing bottom shell 710 is provided with openings on both axial sides, which do not interfere with the fit between the blocking portion 731 and the first flow port 104, or the communication between the second flow port 7311 and the sewage outlet 102. In this embodiment, the sliding fit between the reversing bottom shell 710 and the blocking portion 731 can provide a guide for the axial movement of the movable member 730. Specifically, the outer periphery of the blocking portion 731 can be slidably fitted with the inner periphery of the reversing bottom shell 710.

[0140] Without loss of generality, the reversing bottom shell 710 is fixedly connected to the mounting seat 410. The reversing bottom shell 710 and the filter assembly 30 are respectively located on opposite axial sides of the mounting seat 410. Specifically, the reversing bottom shell 710 can be connected to the mounting seat 410 by means of a snap or screw connection. Without loss of generality, with respect to the two axially distributed sides of the reversing bottom shell 710, one side is fixedly connected to the mounting seat 410, while the other side abuts the filter bottle 10, thereby enhancing the installation stability of the reversing bottom shell 710 within the filter bottle 10, thereby enhancing the guidance of the sealing portion 731 and ensuring a sealed fit with the sealing portion 731. Furthermore, the outer periphery of the reversing bottom shell 710 and the inner periphery of the filter bottle 10 are sealed together by a sealing ring 1002, thereby preventing water leakage at the joint between the reversing bottom shell 710 and the filter bottle 10 and ensuring the sealing effect of the sealing portion 731. Of course, in other embodiments, the reversing bottom shell 710 may also be installed on the filter bottle 10 .

[0141] Without loss of generality, please also refer to Figure 3 、 Figure 5 、 Figure 7 and Figure 9The inner circumference of the reversing bottom shell 710 is the sealing annular surface 711, and the blocking portion 731 is slidably and sealingly engaged with the inner circumference of the reversing bottom shell 710. In this embodiment, the inner circumference of the reversing bottom shell 710 and the outer circumference of the blocking portion 731 can be sealed together, and the inner circumference of the reversing bottom shell 710 can provide a guide for the movement of the blocking portion 731, thereby ensuring that the blocking portion 731 smoothly switches between different positions. Of course, in other embodiments, the sealing annular surface 711 can be formed by the filter bottle 10, and the filter assembly 30 and the sealing annular surface 711 on the filter bottle 10 can be slidably and sealingly engaged. Alternatively, the first flow port 104 that cooperates with the blocking portion 731 can be formed by the reversing bottom shell 710.

[0142] In one embodiment, the pre-filter also includes a reversing member 720, which is hollow. The inner circumference 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.

[0143] In the technical solution of the present invention, the pre-filter is a backwash filter. In flushing mode and filtering mode, the direction of water flowing through the filter assembly 30 is opposite, and this water flow direction is switched by the diverter 720. This solution can change the connection relationship between different structures through the movement of the diverter 720, thereby changing the flow direction of raw water entering the water inlet 201 and the flow path of water within the water filter chamber 101, enabling the pre-filter to switch between filtering mode and flushing mode, and realizing self-flushing of the internal filter assembly 30 of the pre-filter, thereby eliminating the need for manual disassembly and cleaning, facilitating cleaning of the pre-filter, and thereby increasing the service life of the pre-filter. The connecting portion 721 and the blocking portion 722 are integrally formed in the diverter 720, thereby facilitating assembly of the diverter 720, ensuring the overall strength of the diverter 720, and preventing the presence of an installation gap between the connecting portion 721 and the blocking portion 722, which could cause unexpected water leakage into the diverter 720 and cause water flow disturbances.

[0144] In one embodiment, please refer to Figure 2 and Figure 3The valve head 20 is provided with a water-isolating ring 210 between the water inlet 201 and the water outlet 202. The water inlet 201 is connected to the outer circumference of the water-isolating ring 210, and the water outlet 202 is connected to the inner circumference of the water-isolating ring 210. The reversing member 720 is axially movable and inserted into the water-isolating ring 210 and the filter assembly 30. It can be understood that the water-isolating ring 210 and the filter assembly 30 are arranged opposite to each other along the axial direction, and one end of the reversing member 720 is plugged into and matched with the water-isolating ring 210. The reversing member 720 can be sleeved outside the water-isolating ring 210, or the water-isolating ring 210 can be sleeved outside the reversing member 720, and the other end of the reversing member 720 is inserted into the inner circumference of the filter assembly 30. Specifically, the reversing member 720 extends into the water-flowing cavity 340 through the first water-flowing space 610. In this way, the reversing member 720 can stably switch between different positions corresponding to the filtering mode and the flushing mode within the constraints of the water barrier ring 210 and the filter assembly 30. Without loss of generality, the water barrier ring 210 and the plastic lining portion 22 of the valve head 20 are integrally formed. Of course, in other embodiments, the reversing member 720 or other components may be formed with corresponding water barrier structures that cooperate with the valve head 20 to perform the function of the water barrier ring 210 in this embodiment.

[0145] Please also refer to Figure 3 and Figure 4 When the reversing member 720 is driven to the 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 second water flow space 620 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 pass 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.

[0146] Please also refer to Figure 7 and Figure 8When the reversing member 720 is driven to the 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, so as to cut off the filtering flow path between the water inlet 201 and the water filter chamber 101. The position of the connecting portion 721 can allow the water inlet 201 to communicate with the inner circumference of the reversing member 720, so as 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 open 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.

[0147] Among them, the connecting portion 721 and the blocking portion 722 are integrally formed on the reversing member 720, which not only facilitates the assembly of the reversing member 720, but also ensures the overall strength of the reversing member 720, and avoids the installation gap between the connecting portion 721 and the blocking portion 722, which may cause accidental water leakage into the reversing member 720 and cause water flow turbulence.

[0148] In one embodiment, the water-isolating ring 210 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 210, 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.

[0149] In this embodiment, the water flow structure is formed by the water isolation ring 210 and the water distributor 60. The switching member 720 switches between different positions, which can change the relative positions of the blocking portion 722 and the connecting portion 721 with the water flow structure, thereby controlling the connection and disconnection between the water flow structure and the corresponding space, thereby connecting or blocking the corresponding flow path. Of course, in other embodiments, the water flow structure can also be formed only on the water isolation ring 210.

[0150] In one embodiment, please refer to Figure 3 、 Figure 5 、 Figure 7 and Figure 9 The water separator 210 and the water distributor 60 are spaced apart, the water-passing structure is the space between the water separator 210 and the water distributor 60, and the connecting portion 721 and the blocking portion 722 are distributed along the axial direction;

[0151] In the filtering mode, the blocking portion 722 is at least located between the water isolation ring 210 and the water distributor 60 , so that the water inlet 201 is connected to the second water flow space 620 ;

[0152] In the flushing mode, the communication portion 721 is at least partially located between the water isolation ring 210 and the water distributor 60 , so that the communication portion 721 is connected to the water inlet 201 , and the blocking portion 722 blocks the second water flow space 620 .

[0153] In this embodiment, the water-passing structure is configured as the gap between the water-isolating ring 210 and the water distributor 60. The connecting portion 721 and the blocking portion 722 are axially distributed, and the reversing member 720 is axially movable relative to the filter bottle 10. In different modes, the reversing member 720 axially moves to dispose the connecting portion 721 and the blocking portion 722 relative to the gap between the water-isolating ring 210 and the water distributor 60.

[0154] When the barrier portion 722 is arranged relative to the interval between the water-isolating ring 210 and the water distributor 60, the barrier portion 722 is at least located between the water-isolating ring 210 and the water distributor 60, and the interval at this location is divided into two parts by the barrier portion 722, one part is on the outer peripheral side of the reversing member 720, and the other part is on the outer peripheral side of the reversing member 720. The two parts are not directly connected here, but form the following filtration flow path: the 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.

[0155] When the connecting portion 721 is arranged relative to the interval between the water-isolating ring 210 and the water distributor 60, the connecting portion 721 is at least partially located between the water-isolating ring 210 and the water distributor 60. In this way, at this 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 flowing to the sewage outlet 102.

[0156] Among them, the direction from the connecting part 721 to the blocking part 722 can be the direction from the water isolation ring 210 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 210 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 210.

[0157] In other embodiments, the water passing structure can be configured as a through-hole. In one embodiment, the water isolating ring 210 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 210 and the water distributor 60; in another embodiment, the water isolating ring 210 and the water distributor 60 are separately formed, and the water isolating ring 210 and the water distributor 60 are abutted and assembled to form a through-hole.

[0158] 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 rotating the reversing member 720 relative to the water distributor 60 and the water-isolating ring 210 to realize the switching between 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 between 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.

[0159] In one embodiment, please refer to Figure 3 、 Figure 5 、 Figure 7 and Figure 9 The water distributor 60 and the water isolation ring 210 are arranged opposite to each other and spaced apart in the axial direction. In the filtering mode, the axial sides of the blocking portion 722 are respectively connected to the water distributor 60 and the water isolation ring 210, and are respectively connected to the first water flow space 610 and the inner circumference of the water isolation ring 210, and are spaced apart from the second water flow space 620. In the flushing mode, the connecting portion 721 is at least partially located between the water distributor 60 and the water isolation ring 210, and the blocking portion 722 covers the second water flow 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 blocking portion 722 on the adjacent side of the water distributor 60 and the water isolation ring 210, and the water inlet 201 will also be connected to the water filter chamber 101 through the second water flow space 620 on this side. 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 isolation ring 210.

[0160] Specifically, the baffle portion 722 includes an annular main portion 7221 extending axially along the reversing member 720, and a baffle skirt 7222 disposed around the outer periphery of the annular main portion 7221. The annular main portion 7221 is connected to the connecting portion 721 and is slidably connected to the water distributor 60. The baffle skirt 7222 is located between the water distributor 60 and the water ring 210. In the flushing mode, the baffle skirt 7222 abuts the water distributor 60 at the outer periphery of the second water flow space 620 to seal the second water flow space 620. In the filtration mode, a gap is defined between the baffle skirt 7222 and the water distributor 60, separating the baffle skirt 7222 from the second water flow space 620. Furthermore, the outer periphery of the baffle skirt 7222 is spaced apart from the inner periphery of the filter bottle 10, allowing the water inlet 201 to communicate with the second water flow space 620 through the gap.

[0161] In one embodiment, a filtering structure is provided around the circumference of the connecting portion 721. Specifically, the circumferential wall of the connecting portion 721 includes a porous structure that communicates with the water inlet 201. This allows raw water flowing from the water inlet 201 into the water filter chamber 101 to pass through during flushing mode, allowing the raw water to flow into the inner circumference of the filter assembly 30 and clean the filter assembly 30 from the inside out. However, this raw water may contain impurities. If not filtered, these impurities may be trapped within the inner circumference of the filter assembly 30 during the flushing process. When the pre-filter chamber 101 switches from flushing mode to filtering mode, these impurities flow out of the water outlet 202 along with the filtered raw water, resulting in a poor initial filtration effect. Therefore, a filtering structure is also provided around the circumference of the connecting portion 721. This filtering structure is often configured as a filter screen, which is fixed to the inside or outside of the porous structure or integrally formed with the connecting portion 721. The filter screen 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 isolation ring 210 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 .

[0162] In one embodiment, please refer to Figure 3 、 Figure 7 and Figure 12 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 into the water isolation ring 210, and the blocking portion 722 is plugged into the water distributor 60. 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. The peripheral wall of the hollow pipe section 723 is provided with a through hole that communicates with the water filter chamber 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 through the hollow pipe section 723.

[0163] In the filtering mode, raw water enters the water 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 outside to inside along the radial direction of the filter assembly 30, thereby filtering the raw water. After the filtered raw water enters the inner periphery 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 water filter chamber 101 from the water inlet 201, enters the inner periphery of the reversing member 720 through the connecting part 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 outside to 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.

[0164] In one embodiment, please refer to Figure 3 、 Figure 5 、 Figure 7 and Figure 9 The connecting portion 732 is disposed through the impeller body 440, with one end fixedly connected to the blocking portion 731 and the other end drivingly connected to the reversing member 720. Specifically, the blocking portion 731 is located on the side of the impeller body 440 away from the filter assembly 30. The impeller shaft 441 of the impeller body 440 is provided with a through hole, through which the connecting portion 732 is disposed, and is connected to the reversing member 720 on the other side of the impeller body 440. In this manner, the through hole on the impeller shaft 441 provides a guide for the connecting portion 732, ensuring that the movable member 730 can move stably between different positions. At the same time, the connecting portion 732 provides support for the impeller body 440, allowing the impeller body 440 to rotate smoothly about the connecting portion 732. Of course, in other embodiments, the blocking portion 731 may be disposed between the mounting base 410 and the outer frame 50, and the connecting portion 732 may be connected to the reversing member 720 after passing through the outer frame 50.

[0165] Furthermore, in this embodiment, please refer to Figure 3 、 Figure 5 、 Figure 7 and Figure 9The connecting portion 732 is also provided through the mounting seat 410. The blocking portion 731 and the exoskeleton 50 are respectively located on opposite axial sides of the mounting seat 410. The drain port 404 is provided on the side of the mounting seat 410 opposite to the blocking portion 731. The blocking portion 731 can be detachably abutted against the side of the mounting seat 410 facing away from the exoskeleton 50, thereby detachably blocking the drain port 404. In other words, through holes are provided on both axial side surfaces of the mounting seat 410. The connecting portion 732 penetrates the through hole of the impeller body 440 from the side of the mounting seat 410 away from the filter assembly 30, and exits from the side of the mounting seat 410 close to the filter assembly 30, then passes through the exoskeleton 50, extends into the filter assembly 30, and connects with the reversing member 720. The impeller assembly 40 includes a mounting base 410 and an impeller body 440. The sealing portion 731 is located outside the impeller assembly 40, which helps simplify the structure of the mounting base 410 and facilitates the modular design of the impeller assembly 40. Of course, in other embodiments, the sealing portion 731 can also be located inside the mounting base 410, and the connecting portion 732 can be sequentially provided through the impeller body 440, the axial side surface of the mounting base 410 on the side close to the exoskeleton 50, and the exoskeleton 50. In this case, the sealing ring surface 711 corresponds to the inner circumferential surface of the mounting base 410.

[0166] In one embodiment, please refer to Figure 3 、 Figure 5 、 Figure 7 and Figure 9 , the movable member 730 is fixedly connected to the reversing member 720. Thus, when the reversing member 720 is driven to move axially, it can drive the movable member 730 to move axially synchronously, causing the blocking portion 731 to move correspondingly within the sewage discharge channel. 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 can be plugged in so as to be axially movable, with an elastic member 1003 connected therebetween, and the axial movement is transmitted through the elastic member 1003.

[0167] Specifically, the reversing member 720 includes a hollow pipe section 723, and the hollow pipe section 723 and the movable member 730 are fixedly connected on the inner periphery of the filter assembly 30. Specifically, the connecting portion 732 extends into the filter assembly 30 and is connected to the hollow pipe section 723. The movable member 730 and the reversing member 720 can be connected by threads, 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 screw connection. In this way, the movable member 730 and the reversing member 720 are formed separately, and different materials can be selected for processing and forming to meet the requirements of reversing and blocking respectively. Of course, in other embodiments, the reversing member 720 and the blocking portion 731 can also be formed as one piece.

[0168] Without loss of generality, please also refer to Figure 3 、 Figure 4 、 Figure 7 and Figure 8 At least one of the reversing member 720 and the movable member 730 is connected to an elastic member 1003. Under the action of the elastic member 1003, the reversing member 720 and the movable member 730 can naturally maintain the position corresponding to the filtering mode. When the pre-filter switches from the filtering mode to the flushing mode, the water outlet 202 is closed and the sewage outlet 102 is opened, so that there is a pressure difference between the water inlet 201 and the sewage outlet 102. The side of the movable member 730 close to the water inlet 201 will be subjected to pressure, causing the movable member 730 to move toward the sewage outlet 102, thereby driving the reversing member 720 to move accordingly, so that a flushing flow path from the water inlet 201 to the sewage outlet 102 is formed in the pre-filter. At the same time, the elastic member 1003 will undergo elastic deformation. When the pre-filter switches from flushing mode to filtering mode, the sewage outlet 102 is closed, the water outlet 202 is opened, and the elastic member 1003 will resume its deformation, thereby driving the reversing member 720 and the movable member 730 to return to the position corresponding to the filtering mode. That is, the movable member 730 will return to the position separating the two sides of the space. Thereafter, in the absence of external forces, the movable member 730 can be stably maintained in the current position, thereby providing a stable working environment for the filtering process of the pre-filter. Of course, in other embodiments, the mode switching of the pre-filter can also be controlled by other driving methods, such as a manual screw method. The user can switch the pre-filter to different modes by turning the screw in different directions.

[0169] It should be noted that the multiple indicated in this solution should be understood as greater than or equal to two unless otherwise specified.

[0170] The present invention also provides a water system including a prefilter. The specific structure of the prefilter is similar to that of the above-described embodiments. Since the present water system utilizes all of the technical solutions of all of the above-described embodiments, it at least possesses all of the beneficial effects of the technical solutions of the above-described embodiments, and therefore will not be further detailed here. The water system includes at least the relevant components from the prefilter to the water supply terminal. For example, the water system may include household appliances such as a water heater, a dishwasher, and a water dispenser, as well as accessories such as water pipes for household water supply.

[0171] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application 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 the filter bottle is provided with a sewage outlet connected to the water filter cavity on a side away from the valve head; a filter assembly disposed in the water filter cavity, the filter assembly comprising a filter module, a water flow cavity being formed therein, a first water flow port being provided in the axial direction of the filter module for communicating with the water flow cavity, a second water flow port being provided in the circumferential direction of the filter module for communicating with the water flow cavity, the filter module comprising a filter element disposed at the second water flow port, the filter element being at least partially inclined; and A movable part is movably arranged in the water filter chamber, so that the pre-filter can switch between a filtering mode and a flushing mode. The water inlet and the water outlet are arranged on one side of the movable part, and the sewage outlet is arranged on the other side of the movable part. The spaces on the opposite sides of the movable part are separated in the filtering mode and connected in the flushing mode.

2. The prefilter according to claim 1, wherein The valve head and the filter bottle are connected by fasteners.

3. The prefilter according to claim 2, wherein: A first flange is convexly provided on the outer periphery of the filter bottle, and a second flange is convexly provided on the outer periphery of the valve head. The first flange and the second flange are in abutment with each other and are connected by fasteners.

4. The prefilter according to claim 1, wherein The filter module includes two support frames distributed along the axial direction, the water passage cavity is formed between the two support frames, and each support frame is provided with the second water passage.

5. The pre-filter according to claim 4, 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 inner periphery of the first ring portion is provided with the first water outlet, and the second water outlet is provided on the oblique support portion.

6. The prefilter according to claim 5, characterized in that The oblique support portion is formed with a plurality of second water outlets distributed at intervals. The filter module is provided with a filter element corresponding to each support frame. The filter element is stacked on the surface of the oblique support portion.

7. The pre-filter according to claim 5, characterized in that Each of the support 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.

8. The prefilter according to claim 1, wherein: The movable part includes a blocking portion, and a first flow port is formed in the water filter cavity. The penetration direction of the first flow port is parallel to the penetration direction of the sewage outlet. The movable part includes a blocking portion, and the blocking portion is axially movable relative to the filter assembly, and blocks the first flow port in the filtering mode and opens the first flow port in the flushing mode.

9. The prefilter according to claim 8, characterized in that A sealing annular surface is provided in the water filter cavity corresponding to the blocking portion, the axial direction of the sealing annular surface being parallel to the penetrating direction of the first flow opening, the outer periphery of the blocking portion is sealedly fitted with the sealing annular surface and can move axially relative to the sealing annular surface; The axial side surface of the blocking portion can be detachably blocked from the first flow opening. The blocking portion is provided with a second flow opening, and the second flow opening and the first flow opening are staggered. In the flushing mode, the two ends of the second flow opening are respectively connected to the spaces on both sides of the axial direction of the blocking portion.

10. The pre-filter according to claim 9, characterized in that A reversing bottom shell is fixedly installed in the water filtering chamber. The reversing bottom shell is hollow. The inner peripheral surface of the reversing bottom shell is the sealing annular surface. The blocking portion extends into the inner side of the reversing bottom shell and is slidably connected to the reversing bottom shell.

11. The prefilter according to claim 1, wherein The pre-filter further comprises an exoskeleton which is rotatably sleeved on the outside of the filter assembly. The exoskeleton comprises a side frame and a bottom plate which is connected to the side frame and is located away from the valve head.

12. The pre-filter according to claim 11, wherein The outer frame is formed with 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.

13. The pre-filter according to claim 12, wherein: 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 water inlet and a drain, the water inlet includes a first water inlet, and at least in the flushing mode, the first discharge port is connected to the sewage outlet via the first water inlet and the drain port in sequence.

14. The pre-filter according to claim 13, wherein: The water inlet further includes a second water inlet, 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. 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. The second discharge port is located on the outer periphery of the water retaining structure for communicating with the second water inlet.

15. The pre-filter according to claim 13, wherein The movable member includes a blocking portion, the blocking portion is located on a side of the outer frame away from the valve head, and the blocking portion can detachably block at least one of the water inlet and the drain outlet; In the filtering mode, the blocking portion blocks at least one of the water inlet and the drain outlet; in the flushing mode, both the water inlet and the drain outlet are open.

16. The pre-filter according to claim 15, characterized in that The pre-filter also includes a reversing bottom shell, which is fixedly connected to the mounting seat. The reversing bottom shell and the exoskeleton are respectively located on both axial sides of the mounting seat. The blocking portion extends into the inner side of the reversing bottom shell and is slidably connected to the reversing bottom shell.

17. The pre-filter according to claim 1, wherein The pre-filter also includes a reversing member, which is transmission-connected to the movable member. 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. The reversing member includes a connecting portion and a blocking portion. The reversing member can be movably inserted into the filter assembly. The flushing flow path between the water inlet and the reversing member is connected through the connecting portion and cut off by the blocking portion.

18. The pre-filter according to claim 17, wherein: 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, and the water outlet is connected to the inner peripheral side of the water isolating ring. The connecting part and the blocking part are distributed axially, and the reversing member is axially movably inserted into the water isolating ring and the filter assembly.

19. The pre-filter according to claim 18, wherein The filter assembly includes a water distributor, which is located at one end of the filter assembly close to the water isolation ring. The water isolation ring and the water distributor together form a water flow structure, which is connected to the water inlet. The reversing member further includes a hollow pipe section, the connecting portion, the blocking portion and the hollow pipe section are sequentially distributed along the axial direction, the connecting portion is plugged into the water separator, the blocking portion is plugged into the water distributor, and the hollow pipe section extends into the filter module; On adjacent sides of the water distributor and the water isolation ring, the water flow structure is isolated from the connecting portion in the filtering mode and is connected to the connecting portion in the flushing mode.

20. The pre-filter according to claim 19, wherein 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. The water distributor and the water isolation ring are axially opposite and spaced apart. In the filtering mode, the axial sides of the baffle are respectively connected to the water distributor and the water isolation ring, and are respectively connected to the first water flow space and the inner circumference of the water isolation ring, and are spaced apart from the second water flow space. In the flushing mode, the connecting portion is at least partially located between the water distributor and the water isolation ring, and the baffle covers the second water flow space.

21. A water system, characterized in that: The pre-filter comprises the pre-filter according to any one of claims 1 to 20.

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