Pre-filter and water system

Abstract

The invention discloses a pre-filter and a water system, and relates to the technical field of filters. The pre-filter comprises a valve head, a filter bottle, a filter assembly and a reversing part, the filter assembly comprises a filter module, the filter module comprises a supporting framework and a filter part, the supporting framework is provided with a first water passing side located on the axial side and a second water passing side surrounding the supporting framework in the circumferential direction, the filter part is arranged on the second water passing side, and the reversing part is hollow. The inner peripheral side of the reversing part is communicated with the water outlet and the water filtering cavity, the reversing part comprises a communicating part and a blocking part, the reversing part is movably inserted into the filtering assembly, so that the pre-filter can be switched between a filtering mode and a flushing mode, and a flushing flow path between the water inlet and the reversing part is communicated through the communicating part and is cut off through the blocking part. The technical scheme provided by the invention has the technical effects that the filtering effect of the filtering assembly is ensured, and the service life of the pre-filter is prolonged.

Description

Technical Field

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

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

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

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

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

[0006] A filter assembly is fixedly installed in the water filter cavity, the filter assembly includes a filter module, the filter module includes a support frame and a filter element, the support frame has a first water pass side located on one side in the axial direction and a second water pass side surrounding in the circumferential direction, and the filter element is arranged on the second water pass side; and

[0007] The reversing member is hollow, the inner circumference 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 in the filter assembly so that the pre-filter can switch between a filtering mode and a flushing mode, and the flushing flow path between the water inlet and the reversing member is connected through the connecting portion and cut off through the blocking portion.

[0008] 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.

[0009] In one embodiment, the filter assembly includes a water distributor, the water distributor is located at one end of the filter assembly close to the water isolation ring, and the water isolation ring and the water distributor are spaced apart;

[0010] In the filtering mode, the baffle is at least located between the water isolation ring and the water distributor;

[0011] In the flushing mode, the connecting portion is at least partially located between the water isolation ring and the water distributor.

[0012] In one embodiment, the valve head is provided with a water-isolating ring between the water inlet and the water outlet, and the filter assembly also includes a water distributor connected to the axial side of the filter module, the water distributor has a first water flow space corresponding to the first water flow side and a second water flow space corresponding to the second water flow side, and the second water flow space is provided with guide blades, one end of the reversing member is connected to the water-isolating ring, and the other end extends into the filter module through the first water flow space.

[0013] In one embodiment, the reversing member also includes a hollow pipe section, the connecting portion, the blocking portion and the hollow pipe section are distributed in sequence along the axial direction, the connecting portion is plug-fitted with the water isolation ring, the blocking portion is plug-fitted with the water distributor, and the hollow pipe section extends into the filter module.

[0014] In one embodiment, a first connecting hole is provided on the peripheral wall of the hollow tube segment, the outer periphery of the hollow tube segment and the inner periphery of the filter assembly are sealed and matched, and the matching point of the two is located at one end of the first connecting hole away from the baffle portion.

[0015] In one embodiment, the filter assembly also includes an end cover, which includes a cylindrical portion and a limiting ring portion arranged around the cylindrical portion, the limiting ring portion is connected to the side of the filter module away from the water distributor, the cylindrical portion is inserted into the interior of the filter module, and the outer periphery of the hollow pipe segment and the inner periphery of the cylindrical portion are sealed together.

[0016] In one embodiment, the barrier portion includes an annular main body extending along the axial direction of the reversing member, and a barrier skirt arranged around the outer circumference of the annular main body, and the annular main body is inserted into the first water flow space and can be detachably sealed in the second water flow space.

[0017] In one embodiment, a water passing portion is provided on the inner periphery of the annular main body, the water passing portion is provided with a second connecting hole, and a blocking portion protruding toward the water isolation ring is provided in the first water passing space;

[0018] In the filtering mode, the water passing part and the blocking part are arranged at intervals;

[0019] In the flushing mode, the blocking portion abuts against the water flow portion at a side of the second communicating hole away from the water isolation ring.

[0020] In one embodiment, an elastic member is provided between the reversing member and the water distributor, one end of the elastic member is sleeved on the water passing portion, and the other end is sleeved on the blocking portion. Under the action of the elastic member, the reversing member can naturally maintain a position corresponding to the filtering mode.

[0021] In one embodiment, the pre-filter also includes a movable part, the water inlet, the water outlet and the filter assembly are arranged on one side of the movable part, the sewage outlet is arranged on the other side of the movable part, and the movable part is provided with a second flow port. In the flushing mode, both ends of the second flow port are respectively connected to the space on both sides of the movable part. In the filtering mode, the second flow port is blocked so that the space on both sides of the movable part is separated.

[0022] In one embodiment, the pre-filter also includes an exoskeleton and an impeller assembly disposed in the water filter chamber, the exoskeleton being rotatably mounted outside the filter assembly, the impeller assembly including a mounting seat fixedly mounted in the water filter chamber and an impeller body rotatably mounted in the mounting seat, the impeller body being circumferentially fixedly connected to the exoskeleton, the mounting seat being provided with a connected water inlet and a drain, at least one of the drain and the water inlet being a first flow port, the movable part including a sealing portion, the axial side surface of the sealing portion being separably sealed from the first flow port, and the second flow port and the first flow port being staggered.

[0023] In one embodiment, a sealing annular surface is provided in the water filter cavity corresponding to the sealing portion, and the outer periphery of the sealing portion is sealed to fit the sealing annular surface and can move axially relative to the sealing annular surface.

[0024] In one embodiment, the pre-filter also includes a reversing bottom shell fixedly connected to the mounting seat, the reversing bottom shell and the outer frame are respectively located on both axial sides of the mounting seat, the inner circumferential surface of the reversing bottom shell is the sealing annular surface, the sealing portion extends into the inner side of the reversing bottom shell, and is slidably connected to the reversing bottom shell.

[0025] In one embodiment, the exoskeleton is formed with a siphon flow channel, the exoskeleton includes a chassis and a side frame, 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 a second discharge port penetrating along the axial direction, the exoskeleton and the mounting seat are formed with a water retaining structure on opposite sides, the water retaining structure is arranged around the first discharge port, and the second discharge port is located at the periphery of the water retaining structure;

[0026] The water inlet includes a first water inlet arranged on one axial side of the mounting seat and a second water inlet arranged on a circumferential side of the mounting seat, the first discharge port is connected to the first water inlet, and the second discharge port is connected to the second water inlet.

[0027] In one embodiment, the pre-filter also includes an exoskeleton, the exoskeleton is provided with a water flow driving component, the water flow driving component has a driving surface, and the driving surface is arranged at an angle relative to the circumference of the exoskeleton, so that the driving surface can drive the exoskeleton to rotate after being impacted by the water flow.

[0028] In one embodiment, the water flow driving component includes a hanging portion and a driving body, the hanging portion is hung on the end of the exoskeleton close to the water inlet, the driving body is arranged in a conformal manner with the inner circumferential wall of the exoskeleton, the driving body extends along the circumferential arc of the exoskeleton, and has a plurality of water baffles distributed at intervals, and the driving surface is formed on the water baffles.

[0029] In one embodiment, the filter element is in a straight cylindrical shape.

[0030] In one embodiment, the filter element is sleeved outside the supporting frame, and the supporting frame includes a main body portion and an additional portion distributed along the axial direction. A sealing ring is sleeved at one end of the main body portion away from the additional portion, and a sealing ring is also sleeved at the additional portion. Both ends of the filter element are sealed and fitted to the supporting frame through a sealing ring.

[0031] The present invention also provides a water use system, comprising the aforementioned pre-filter.

[0032] In the technical solution of the present invention, the pre-filter is a backwash filter. In the flushing mode and the filtering mode, the flow direction of water flowing through the filtering component is opposite, and the flow direction of the water flow is switched by the reversing member. The technical solution of the present invention can change the connection relationship between different structures through the movement of the reversing member, thereby changing the flow direction of the raw water entering the water inlet and the flow path of the water flow in the water filter cavity, so as to realize the switching of the pre-filter between the filtering mode and the flushing mode, and realize the self-flushing of the internal filtering component of the pre-filter, so that there is no need for manual disassembly and cleaning, which facilitates the cleaning of the pre-filter and thus increases the service life of the pre-filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0034] Figure 1 A schematic structural diagram of an embodiment of a pre-filter provided by the present invention;

[0035] Figure 2 A schematic structural diagram of an embodiment of a valve head of a pre-filter provided by the present invention;

[0036] Figure 3 A schematic cross-sectional structure diagram of an embodiment of the pre-filter provided by the present invention in filtering mode;

[0037] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0038] Figure 5 for Figure 3 A schematic diagram of a local structure at another location in the figure;

[0039] Figure 6 A schematic cross-sectional structure diagram of an embodiment of the pre-filter provided by the present invention in a flushing mode;

[0040] Figure 7 for Figure 6 A partial enlarged view of point B in the middle;

[0041] Figure 8 for Figure 6 A schematic diagram of a local structure at another location in the figure;

[0042] Fig. 9 A schematic structural diagram of an embodiment of a filter assembly of a pre-filter provided by the present invention;

[0043] Fig.10 A schematic cross-sectional structure diagram of an embodiment of a filter assembly of a pre-filter provided by the present invention;

[0044] Fig.11 A schematic structural diagram of an embodiment of a reversing member of a pre-filter provided by the present invention;

[0045] Fig.12 A schematic structural diagram of an embodiment of a movable part of a pre-filter provided by the present invention;

[0046] Fig.13 for Fig.12 A schematic diagram of the structure of the moving parts from another perspective;

[0047] Fig.14 A schematic structural diagram of an embodiment of an exoskeleton of a pre-filter provided by the present invention;

[0048] Fig.15 for Fig.14 A schematic diagram of the structure of the exoskeleton from another perspective;

[0049] Fig.16 A schematic structural diagram of an impeller assembly of an embodiment of a pre-filter provided by the present invention;

[0050] Fig.17 for Fig.16 A schematic diagram of the structure of the impeller assembly from another perspective;

[0051] Fig.18 for Fig.16 A schematic structural diagram of an impeller body of an impeller assembly according to an embodiment of the present invention.

[0052] Description of Figure Numbers:

[0053] 10. filter bottle; 101. water filter chamber; 102. sewage outlet; 104. first flow outlet;

[0054] 20. Valve head; 21. Metal shell; 22. Plastic lining; 201. Water inlet; 202. Water outlet; 210. Water isolation ring;

[0055] 30, filter assembly; 300, filter module; 301, first water flow side; 302, second water flow side;

[0056] 310, supporting frame; 311, main body; 312, additional part;

[0057] 320, filter element;

[0058] 360, end cover; 361, cylindrical portion; 362, limiting ring portion;

[0059] 40, impeller assembly; 410, mounting seat; 402, first water inlet; 403, second water inlet; 404, drain outlet; 424, water retaining ring;

[0060] 440, impeller body; 441, impeller shaft; 442, impeller blades; 443, second protrusion;

[0061] 50, outer frame; 501, siphon flow channel; 503, first discharge port; 504, second discharge port;

[0062] 511, chassis; 512, side frame; 513, first protrusion; 514, water retaining ring; 531, siphon hole;

[0063] 540, water flow driving member; 541, hanging part; 542, driving body; 543, water baffle; 544, driving surface;

[0064] 60, water distributor; 610, first water flow space; 620, second water flow space; 621, guide vane; 604, blocking part;

[0065] 710, reversing bottom shell; 711, sealing ring surface;

[0066] 720, reversing member; 721, connecting portion; 722, blocking portion; 7221, annular main body; 7222, blocking skirt; 7224, water passing portion; 7225, second connecting hole; 723, hollow pipe section; 7231, first connecting hole;

[0067] 730, movable part; 731, blocking part; 7311, second flow opening; 732, connecting part;

[0068] 1001. Fastener; 1002. Sealing ring; 1003. Elastic member.

[0069] 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

[0070] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0072] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0073] Water use systems, such as whole-house water purification systems, are usually equipped with pre-filters, which are used to filter large particles of tap water. This not only ensures the safety of residents' water use, but also extends the service life of home appliances, prevents blockage of household water pipes, and improves the health of residents. The pre-filter is the first coarse filtration device in the whole-house water purification system. It is a physical filtration device used to protect the safety of back-end water use.

[0074] The present invention proposes a pre-filter, which has a filtering mode and a flushing mode. In the filtering mode, the pre-filter can filter large particles before using the water end. In the flushing mode, the pre-filter can clean the filtering components inside it to discharge the large particles previously intercepted, thereby eliminating the need to manually disassemble and clean the pre-filter, thereby increasing the service life of the pre-filter.

[0075] 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.

[0076] The water inlet 201 is connected to the water supply end of the water use system, and the water outlet 202 is connected to the water use end of the water use system, thereby filtering the raw water flowing from the water supply end to the water use end. It should be noted that the water supply end can be a water pipe, a water tower or a well water, and the water use end can be a faucet, a shower or a drinking water outlet, and this application does not make specific limitations on this.

[0077] The connection between the valve head 20 and the filter bottle 10 can be threaded connection. For example, the valve head 20 is provided with an external threaded tube, and the mouth of the filter bottle 10 is provided with an internal thread for threading the external threaded tube. In order to reduce the production difficulty of the pre-filter and the inspection requirements of the assembly results, and 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. The fastener 1001 can be a bolt, and the locking of the filter bottle 10 and the valve head 20 is achieved through the threaded cooperation between the bolt and the through hole; the fastener 1001 can also be a bolt and a nut assembly, and the bolt is locked with the nut after passing through the through hole; the fastener 1001 can also be a pin and a pin assembly, and the pin is passed through the through hole, and the pin is passed through the pin through the pin, so as to achieve the locking of the filter bottle 10 and the valve head 20.

[0078] The valve head 20 includes a metal shell part 21 and a plastic lining part 22 connected to each other, and the water inlet 201 and the water outlet 202 are both formed on the plastic lining part 22. The metal shell part 21 of the valve head 20 and the filter bottle 10 are connected by a fastener 1001. In this way, the water flowing through the pre-filter directly contacts the plastic lining part 22 instead of the metal shell part 21, which can avoid the problem of water being contaminated by metal elements precipitated from the metal shell part 21, and can also make the pre-filter have good aesthetics and shell strength. In other embodiments, the valve head 20 can also be directly configured as a metal part.

[0079] 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).

[0080] The pre-filter also includes a filter assembly 30 disposed in the water filter chamber 101. After the raw water (such as tap water or well water) flows into the water inlet 201 from the external water source, it can flow through the filter assembly 30 for filtration. The filter assembly 30 can intercept large particles of impurities in the water and remove some precipitated impurities, rust, sand, mud, bacteria and other particulate impurities generated in the pipeline, and play a good protective function for water purifiers, washing machines, showers, high-end faucets, downstream pipelines, etc., reducing the risk of damage to these devices due to clogging by impurities. The form and structure of the filter assembly 30 are not limited. The filter assembly 30 can be equipped with a stainless steel filter or a PP cotton filter to filter impurities.

[0081] 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.

[0082] In one embodiment, please refer to Fig. 9 and Fig.10The filter assembly 30 includes a filter module 310, and the filter module 310 includes a support frame 311 and a filter element 312. The support frame 311 has a first water-passing side 301 located on one side of the axial direction and a second water-passing side 302 surrounding the circumferential direction, and the filter element 312 is arranged on the second water-passing side 302. It can be understood that when the water flows through the filter module 310, it will flow in from one of the first water-passing side 301 and the second water-passing side 302, and then flow out from the other of the first water-passing side 301 and the second water-passing side 302, that is, the water will pass through the filter element 312, thereby being filtered by the filter element 312, and impurities will be intercepted by the filter element 312, and the filtered water will flow to the user's water-using end through the water outlet 202. Without loss of generality, when the pre-filter is in the filtering mode, the water inlet 201, the second water pass side 302, the first water pass side 301 and the water outlet 202 will be distributed in sequence along the upstream and downstream, that is, the raw water entering from the water inlet 201 will first pass through the second water pass side 302 and flow into the inner periphery of the filter module 310, thereby being filtered by the filter element 312, and then flow out of the filter module 310 from the first water pass side 301 and flow to the water outlet 202.

[0083] Specifically, the filter element 312 is a straight-cylindrical structure, and the support frame 311 is a corresponding straight-cylindrical structure, and one side of the support frame 311 is open to form the first water-passing side 301. In this way, the support frame 311 and the filter element 312 have simple structures, which can facilitate the processing and forming of the filter element 312 and the support bracket, and can facilitate the installation of the filter assembly 30 in the water filter chamber 101. At the same time, the support frame 311 and the filter element 312 are both circumferentially continuous structures, and the structural strength can be guaranteed, which is conducive to improving the ability of the filter assembly 30 to resist water flow impact, thereby facilitating the service life of the filter assembly 30. Of course, the filter element 312 and the support frame 311 can also be other structural forms, such as a conical structure.

[0084] Optionally, the material of the support frame 311 is configured as plastic. First, plastic materials are cheaper than other materials such as metals, which helps to reduce the manufacturing cost of the filter module 310; second, plastic materials have good corrosion resistance to various chemical substances and can be used for a long time in various corrosive environments, reducing the damage and replacement frequency of the filter module 310 caused by corrosion; third, the density of plastic materials is low, which reduces the overall weight of the support frame 311 and facilitates installation, transportation and maintenance; fourth, because plastic materials have good processing properties, they can be made into filter frames of various shapes and sizes through various processes such as injection molding and extrusion, which facilitates the processing and molding of the support frame 311. Of course, the present invention is not limited to this. In other embodiments, the material of the support frame 311 can also be configured as metal.

[0085] Optionally, the filter element 312 is made of metal, which is durable and stable, and can increase the service life of the filter element 312, thereby effectively filtering water for a long time, reducing the replacement frequency and cost. Of course, the present invention is not limited to this, and in other embodiments, the filter element 312 can also be made of plastic.

[0086] In this embodiment, the filter element 312 is configured as a metal filter screen, which has a solid structure and can withstand certain pressure and impact to ensure safety during use. Moreover, the metal filter screen can be customized according to user needs, such as customizing equipment of non-standard size, etc., to meet the use requirements under different support frames 311. Furthermore, since the metal filter screen can be rinsed and is easy to clean. Of course, the present invention is not limited to this. In other embodiments, the filter element 312 can also be configured as a filter membrane.

[0087] Optionally, the filter element 312 and the support frame 311 are integrally injection molded. It should be noted that the filter element 312 is a metal part, and the material of the support frame 311 is plastic. During the production process, the filter element 312 is first installed in the mold, and then the support frame 311 is molded by the injection molding process. In this way, the filter element 312 will be welded to the surface of the support frame 311 made of plastic material through the high temperature in the mold, so that the filter element 312 and the support frame 311 are integrally injection molded. During the injection molding process, the filter element 312 is directly combined with the plastic support frame 311, avoiding secondary processing steps such as hot melting, welding, and riveting, thereby shortening the assembly time and reducing production costs. Moreover, embedding the filter element 312 in the support frame 311 can improve the installation strength of the filter element 312, so that it can withstand greater loads and impacts.

[0088] In this embodiment, the filter element 320 is sleeved outside the support frame 310. That is, after the support frame 310 and the filter element 320 are formed separately, the filter element 320 is sleeved outside the support frame 310, so that the two are assembled into one body, so that the connection stability of the two and the structural stability of the filter assembly can be guaranteed. Among them, both ends of the filter element 320 are sealed with the support frame 310 to prevent water from flowing out from the end surface joint of the filter element 320 and the support frame 310, so that the water that is not filtered by the filter element 320 and the water that is filtered by the filter element 320 penetrate each other, affecting the filtering effect of the pre-filter.

[0089] Specifically, the support frame 310 includes a main body 311 and an additional part 312 distributed along the axial direction. The main body 311 is sleeved with a sealing ring at one end away from the additional part 312, and the additional part 312 is also sleeved with a sealing ring. The two ends of the filter 320 are respectively sealed and matched with the support frame 310 through a sealing ring. In this way, the inner and outer peripheral sides of the sealing ring will abut against the support frame 310 and the filter 320 respectively, so that both ends of the filter 320 are sealed and matched with the support frame 310 to ensure the filtering effect of the pre-filter. When assembling, the side of the main body 311 away from the sealing ring can be inserted into the filter 320 until the other side of the support is aligned with the filter 320, and then the additional part 312 is installed in the filter 320. In this way, during the assembly process of the support frame 310 and the filter 320, the filter 320 will not be subject to the resistance of the sealing ring throughout the whole process, and the assembly of the support frame 310 and the filter 320 can be completed more labor-saving and more conveniently. Of course, in other embodiments, the end of the filter element 320 may be bonded to the support frame 310 by using waterproof glue.

[0090] In one embodiment, please refer to Figures 3 to 8 and Fig.11 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.

[0091] In the technical solution of the present invention, the pre-filter is a backwash filter. In the flushing mode and the filtering mode, the flow direction of the water flowing through the filter assembly 30 is opposite, and the flow direction of the water flow is switched by the reversing member 720. This solution can change the connection relationship between different structures through the movement of the reversing member 720, thereby changing the flow direction of the raw water entering the water inlet 201 and the water flow path in the filter chamber 101, so as to realize the switching of the pre-filter between the filtering mode and the flushing mode, and realize the self-flushing of the internal filter assembly 30 of the pre-filter, so as to avoid manual disassembly and cleaning, facilitate the cleaning of the pre-filter, and thus improve the service life of the pre-filter. Among them, the connecting portion 721 and the blocking portion 722 are integrally formed on the reversing member 720, so as to facilitate the assembly of the reversing member 720, ensure the overall strength of the reversing member 720, and avoid the installation gap between the connecting portion 721 and the blocking portion 722, thereby causing the reversing member 720 to accidentally seep water, resulting in the possibility of water flow turbulence.

[0092] Furthermore, the filter assembly also includes a water distributor, which is connected to the filter module along the axial direction and is located on a side close to the valve head. Please refer to Figure 3 , Figure 4 , Figure 7 , Figure 8 and Fig.14 The water distributor 60 has a first water flow space 610 corresponding to the first water flow side 301 and a second water flow space 620 corresponding to the second water flow side 302. The second water flow space 620 is provided with a guide vane 621. The reversing member 720 extends into the filter module 300 through the first water flow space 610. That is, the filter flow path between the water inlet 201 and the outer peripheral side of the filter module 300 can be communicated through the second water flow space 620, the blocking part 722 can block the filter flow path by covering the second water flow space 620, and the filter flow path between the inner peripheral side of the filter module 300 and the water outlet 202 can be communicated through the first water flow space 610. In addition, the water flows into the water filter chamber 101 through the second water flow space 620, which can form a vortex to disturb the water flow and prevent impurities from being deposited.

[0093] In one embodiment, please refer to Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 The 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 peripheral side of the water-isolating ring 210, the water outlet 202 is connected to the inner peripheral side of the water-isolating ring 210, and the reversing member 720 is inserted in the water-isolating ring 210 and the filter assembly 30 axially movably. It can be understood that the water-isolating ring 210 and the filter assembly 30 are arranged opposite to each other in the axial direction, and one end of the reversing member 720 is plugged into and matched with the water-isolating ring 210, wherein 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 extends into the filter module 300 through the first water-passing space 610. In this way, the reversing member 720 can stably switch between different positions corresponding to the filtering mode and the flushing mode under the restriction of the water-isolating ring 210 and the filter assembly 30. Of course, in other embodiments, the reversing member 720 or other components may be provided with a corresponding water-isolating structure, which cooperates with the valve head 20 to play the role of the water-isolating ring 210 in this embodiment.

[0094] Please also read Figure 3 and Figure 4When the reversing member 720 is driven to a position corresponding to the filtering mode, the position of the blocking portion 722 can avoid the filtering flow path between the water inlet 201 and the second water flow space 620, and cut off the flushing flow path between the water inlet 201 and the inner circumference of the reversing member 720, so that the filtering flow path from the water inlet 201 to the water filter chamber 101 through the 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 flow through the second water flow space 620 to the filter assembly 30 for filtration, and flow from outside to inside along the radial direction of the filter assembly 30, thereby filtering the raw water, and the filtered water flows to the water outlet 202 through the inner circumference of the reversing member 720.

[0095] Please also read Figure 6 and Figure 7 When the reversing member 720 is driven to a position corresponding to the flushing mode, the position of the blocking portion 722 can separate the water inlet 201 and the second water flow space 620 to separate the filtering flow path between the water inlet 201 and the water filter chamber 101, and the position of the connecting portion 721 can provide the water inlet 201 to connect to the inner circumference of the reversing member 720 to conduct the flushing flow path from the water inlet 201 to the water filter chamber 101 through the inner circumference of the reversing member 720. At this time, since the sewage outlet 102 is opened and the water outlet 202 is closed, the raw water enters from the water inlet 201, enters the inner circumference of the reversing member 720 through the connecting portion 721, and then flows to the filter assembly 30 to flush the filter assembly 30, and finally is discharged from the sewage outlet 102.

[0096] Among them, the connecting part 721 and the blocking part 722 are integrally formed on the switching part 720, which not only facilitates the assembly of the switching part 720, but also ensures the overall strength of the switching part 720, and avoids the possibility of an installation gap between the connecting part 721 and the blocking part 722, which may cause accidental water seepage into the switching part 720 and cause water flow turbulence.

[0097] 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.

[0098] In this embodiment, the water-passing structure is formed by the water-isolating ring 210 and the water distributor 60. The reversing member 720 switches between different positions, and can change the relative positions between the blocking portion 722 and the connecting portion 721 and the water-passing structure, thereby controlling the connection and disconnection between the water-passing structure and the corresponding space, so that the corresponding flow path is connected and the corresponding flow path is blocked. Of course, in other embodiments, the water-passing structure can also be formed only on the water-isolating ring 210.

[0099] In one embodiment, please refer to Figure 3 , Figure 4 , Figure 6 and Figure 7 , the water isolating ring 210 and the water distributor 60 are spaced apart, the water passing structure is the space between the water isolating ring 210 and the water distributor 60, and the connecting portion 721 and the blocking portion 722 are distributed along the axial direction;

[0100] 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 passage space 620;

[0101] In the flushing mode, the connecting portion 721 is at least partially located between the water isolation ring 210 and the water distributor 60 , so that the connecting portion 721 is connected to the water inlet 201 , and the blocking portion 722 blocks the second water flow space 620 .

[0102] In this embodiment, the water passing structure is configured as the interval between the water isolation ring 210 and the water distributor 60, the connecting portion 721 and the blocking portion 722 are distributed along the axial direction, and the reversing member 720 is axially movable relative to the filter bottle 10. In different modes, the reversing member 720 moves axially to respectively set the connecting portion 721 and the blocking portion 722 relative to the interval between the water isolation ring 210 and the water distributor 60.

[0103] When the blocking portion 722 is arranged relative to the interval between the water blocking ring 210 and the water distributor 60, the blocking portion 722 is at least located between the water blocking ring 210 and the water distributor 60, and the interval at this location is divided into two parts by the blocking portion 722, one part is located on the outer peripheral side of the reversing member 720, and the other part is located on the outer peripheral side of the reversing member 720. The two parts are not directly connected here, and the following filtration flow path is formed: raw water flows from the water inlet 201 through the second water flow space 620 to the water filter chamber 101, and in the water filter chamber 101, flows from the outer peripheral side of the filter assembly 30 to the inner peripheral side of the filter assembly 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.

[0104] 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 the interval, the outer peripheral side of the reversing member 720 can be connected to the inner peripheral side of the reversing member 720 through the connecting portion 721. Since the blocking portion 722 blocks the second water flow space 620, the raw water flows from the water inlet 201 through the connecting portion 721 to the inner periphery of the reversing member 720, and then at the position corresponding to the filter assembly 30, it flows from the inner periphery of the reversing member 720 through the filter assembly 30 to the water filter chamber 101 on the outer peripheral side of the filter assembly 30, thereby flushing the filter assembly 30, and finally flows to the sewage outlet 102.

[0105] 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.

[0106] 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.

[0107] And when the water passing structure is configured as a through hole, the connecting portion 721 and the blocking portion 722 can be distributed along the circumference of the reversing member 720, that is, the connection relationship between different structures is changed by the rotation of the reversing member 720 relative to the water distributor 60 and the water blocking ring 210 to realize the switching of the filtering mode and the flushing mode. At this time, in the filtering mode, the through hole and the connecting portion 721 are circumferentially misaligned. Of course, the connecting portion 721 and the blocking portion 722 can also be distributed along the axial direction of the reversing member 720, that is, the reversing member 720 realizes the switching of the filtering mode and the flushing mode through axial movement. At this time, in the filtering mode, the through hole and the connecting portion 721 are axially misaligned.

[0108] In one embodiment, the water distributor 60 and the water-isolating ring 210 are axially opposed and spaced apart. In the filtering mode, the axial sides of the blocking portion 722 are respectively connected to the water distributor 60 and the water-isolating ring 210, and are respectively connected to the first water flow space 610 and the inner circumference of the water-isolating 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-isolating 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.

[0109] Specifically, the baffle portion 722 includes an annular main body 7221 extending along the axial direction of the reversing member 720, and a baffle skirt 7222 arranged around the outer periphery of the annular main body 7221. The annular main body 7221 is connected to the connecting portion 721 and is slidably connected to the water distributor 60. The baffle skirt 7222 is located between the water distributor 60 and the water isolation ring 210. In the flushing mode, the baffle skirt 7222 abuts against the water distributor 60 at the outer periphery of the water flow space to cover the second water flow space 620. In the filtering mode, there is a gap between the baffle skirt 7222 and the water distributor 60, that is, it is spaced from the second water flow space 620, and the outer periphery of the baffle skirt 7222 and the inner periphery of the filter bottle 10 are matched with each other, so that the water inlet 201 can be connected to the second water flow space 620 through the above gap.

[0110] In one embodiment, a filtering structure is provided around the circumference of the connecting portion 721. Specifically, the peripheral wall of the connecting portion 721 has a porous structure that can be connected to the water inlet 201, so that in the flushing mode, the raw water flowing into the water filter chamber 101 from the water inlet 201 can pass through, so as to pass the raw water into the inner periphery of the filter assembly 30, and clean the filter assembly 30 from the inside to the outside. However, there may be impurities inside the raw water. If it is not filtered, the impurities in the raw water may be filtered and stored in the inner periphery of the filter assembly 30 during the flushing process. When the pre-filter chamber 101 is converted from the flushing mode to the filtering mode, the impurities in the inner periphery flow out of the water outlet 202 together with the filtered raw water, resulting in a poor initial filtering effect. Therefore, a filtering structure is also provided around the connecting portion 721, and the filtering structure is often configured as a filter net, which is fixed to the inner side or outer side of the porous structure, or integrally formed on the connecting portion 721. Among them, the filter net can be bonded to the connecting portion 721. In other embodiments, the filtering structure may also be directly disposed on the periphery of the water-isolating ring 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 .

[0111] In one embodiment, please refer to Figure 3 , Figure 4 , Figure 6 , Figure 7 and Fig.11 , the reversing member 720 further includes a hollow pipe section 723, the connecting portion 721, the blocking portion 722 and the hollow pipe section 723 are sequentially distributed along the axial direction, the connecting portion 721 is plugged and matched with the water isolation ring 210, the blocking portion 722 is plugged and matched with the water distributor 60, and the hollow pipe section 723 extends into the filter module 300. It can be understood that the axis of the hollow pipe section 723 is parallel to or even coincides with the axis of the filter bottle 10, and the peripheral wall of the hollow pipe section 723 is provided with a through hole connected to the water filter cavity 101. In the flushing mode, the water flow entering the reversing member 720 from the connecting portion 721 can be guided to the inner periphery of the filter assembly 30 via the hollow pipe section 723.

[0112] In the filtering mode, raw water enters the filter chamber 101 from the water inlet 201, flows to the filter assembly 30 through the second water flow space 620 of the water distributor 60, and flows from the outside to the inside along the radial direction of the filter assembly 30, thereby filtering the raw water. After the filtered raw water enters the inner circumference of the filter assembly 30, it can enter the hollow pipe section 723, and then flow upward to the water outlet 202 under the action of water pressure; in the flushing mode, raw water enters the filter chamber 101 from the water inlet 201, enters the inner circumference of the reversing member 720 through the connecting portion 721, and continues to flow downward to the hollow pipe section 723, and then sprays toward the filter assembly 30, so that the cleaning water flow is sprayed from the outside to the inside along the radial direction of the filter assembly 30 to take away impurities on the filter assembly 30, thereby achieving the purpose of flushing the filter assembly 30, and then flows out from the sewage outlet 102.

[0113] In one embodiment, please refer to Figure 5 , Figure 8 and Fig.10 The filter assembly 30 also includes an end cover 360, which includes a cylindrical portion 361 and a limiting ring portion 362 arranged around the cylindrical portion 361, the limiting ring portion 362 is connected to the side of the filter module 300 away from the water distributor 60, the cylindrical portion 361 is inserted into the filter module 300, and the outer periphery of the hollow pipe segment 723 and the inner periphery of the cylindrical portion 361 are sealed and matched. Specifically, the cylindrical portion 361 is plugged into the inner circumference of the additional portion 312, the limiting ring portion 362 is limitedly abutted against the end face of the additional portion 312, the hollow tube section 723 and the cylindrical portion 361 are sealed by the sealing ring 1002, the hollow tube section 723 extends into the inner circumference of the cylindrical portion 361, and the connecting portion 732 of the movable part 730 in the following text also extends into the inner circumference of the cylindrical portion 361 and connects with the hollow tube section 723. In this way, the hollow tube section 723 and the movable part can be connected through the cylindrical portion 361. At the same time, the cylindrical part 361 can play a certain guiding role in the movement of the hollow pipe section 723 and the movable part 730. On this basis, due to the sealing cooperation between the hollow pipe section 723 and the cylindrical part 361, the water flow will not leak at the connection between the hollow pipe section 723 and the cylindrical part 361. The water flow in the inner periphery of the filter module 300 and the water filter cavity 101 needs to pass through the second water passing side 302, that is, it needs to pass through the filter element 320, so as to ensure the filtering effect of the pre-filter. Of course, in other embodiments, it is also possible that the inner periphery of the filter module 300 is directly convexly provided with a corresponding structure and the hollow pipe section 723 is sealed.

[0114] In one embodiment, please refer to Figure 6 , Figure 8 , Fig.14 and Fig.15, the pre-filter also includes an exoskeleton 50, and the exoskeleton 50 is rotatably mounted on the outside of the filter assembly 30. In this way, the exoskeleton 50 can be rotated to disturb the water flow in the water filter chamber 101, thereby preventing impurities from being deposited and attached to the filter assembly 30, the exoskeleton 50 and the side walls of the water filter chamber 101, reducing the possibility of clogging of the filter assembly 30, thereby ensuring the filtering effect of the filter assembly 30. In this embodiment, the exoskeleton 50 includes a side frame 512 and a chassis 511, and the chassis 511 is connected to the side frame 512 and is located on a side away from the valve head 20, with strong structural stability and high rotation stability. Of course, in other embodiments, the exoskeleton 50 may also include only the side frame 512 structure.

[0115] In one embodiment, please refer to Figure 6 and Figure 8 The outer frame 50 is formed with a siphon channel 501, the side frame 512 is provided with a siphon hole 531 connected to the siphon channel 501, and the bottom plate 511 is provided with a first discharge port 503 connected to the siphon channel 501, and the first discharge port 503 is connected to the sewage outlet 102 at least in the flushing mode. The technical solution of the present invention is to set the siphon channel 501 and the siphon hole 531 on the outer frame 50, when the impurities and particles intercepted by the filter assembly 30 are impacted by the water flow and fall off, they can be sucked into the siphon hole 531 and the siphon channel 501 by the siphon effect, and be more efficiently discharged to the sewage outlet 102 through the first discharge port 503. That is, the impurities, particles, etc. intercepted by the filter assembly 30 can be more effectively guided to the sewage outlet 102 in the flushing mode, and finally discharged through the sewage outlet 102, thereby improving the flushing effect of the water filter cavity 101, especially the filter assembly 30.

[0116] In one embodiment, please refer to Figure 6 , Figure 8 , Figures 16 to 18 An impeller assembly 40 is also provided in the water filter chamber 101, and the impeller assembly 40 includes a mounting seat 410 and an impeller body 440 rotatably mounted on the mounting seat 410, and the mounting seat 410 is formed with a water inlet and a drain port 404, and 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.

[0117] During the flushing stage of the pre-filter, that is, when the drain valve is opened, water flows into the pre-filter through the water inlet of the impeller assembly 40, and the impeller body 440 rotates under the impact of the water flow. This rotational motion can generate a vortex effect, so that the water flow forms a stronger agitation inside the filter bottle 10, thereby more effectively removing impurities and dirt attached to the surface of the filter medium. Compared with static water flow, the dynamic cleaning of the impeller assembly 40 can significantly improve the efficiency and effect of flushing. In addition, the rotational motion of the impeller body 440 can stir up the impurities and dirt inside the filter bottle 10, suspending them in the water, and discharge the filter bottle 10 with the water flow through the drain valve and the drain port 102, thereby avoiding the re-deposition of impurities on the filter medium and ensuring the thoroughness of the flushing process. In addition, the impeller assembly 40 can effectively prevent the clogging of the filter medium, keep the water flow unobstructed, and maintain the filtering efficiency of the pre-filter by enhancing the flushing effect. This is crucial to maintaining stable water pressure and clean water quality in home or commercial systems.

[0118] 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.

[0119] By arranging the impeller assembly 40 in the sewage system and using the water flow power to drive the impeller body 440 to rotate, not only can the flushing force and stirring effect of the water flow be enhanced, but also the sewage discharge efficiency and cleanliness can be improved. At the same time, the design of the impeller assembly 40 can be relatively simple, low cost, and no additional energy consumption is required, which helps to reduce the overall operating cost and reduce the waste of water resources.

[0120] Furthermore, the outer frame 50 is transmission-connected to the impeller body 440 , so that the impeller body 440 can rotate in the same direction as the outer frame 50 during the flushing stage and provide additional rotational driving force to the outer frame 50 .

[0121] There are many structural forms for realizing the transmission connection between the outer frame 50 and the impeller body 440. For example, the impeller body 440 is coaxially connected with the outer frame 50 and fixed in the circumferential direction, that is, the rotation axis of the impeller body 440 and the outer frame 50 is kept fixed in the circumferential direction. Fig.15 and Fig.16, it can be that a plurality of first protrusions 513 are distributed along the circumference of one side of the exoskeleton 50 facing the mounting seat 410, a plurality of second protrusions 443 are provided at one end of the impeller shaft 441 close to the exoskeleton 50, the plurality of second protrusions 443 are distributed along the circumference of the impeller shaft 441, and a first protrusion 513 is clamped between two adjacent second protrusions 443. Without loss of generality, the connecting portion 732 of the movable member 730 is penetrated through the mounting seat 410, the impeller body 440 and the exoskeleton 50, and the first protrusion 513 and the second protrusion 443 are also matched at the outer periphery 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 turbulent effect of the exoskeleton 50 and the impeller body 440, thereby avoiding the deposition of impurities.

[0122] It is worth mentioning that the first discharge port 503 is disposed at an oblique angle, so that the water flow can be inclined to enter the mounting seat 410, thereby improving the rotation efficiency of the impeller body 440.

[0123] In one embodiment, the water inlet further includes a second water inlet 403, the first water inlet 402 is arranged on one axial side of the mounting seat 410, and the second water inlet 403 is arranged 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 arranged on the impeller shaft 441, and the water flows from the first water inlet 402 and the second water inlet 403 can both cause the impeller blades 442 to drive the impeller shaft 441 to rotate. In this way, the water flow path and flow rate entering the mounting seat 410 are increased through the first water inlet 402 and the second water inlet 403, and the provision of multiple water inlets can form a more complex flow pattern of water flow in the impeller chamber, providing sufficient power for the rotation of the impeller body 440.

[0124] See also Fig.17 Specifically, optionally, the impeller body 440 includes an impeller shaft 441 and a plurality of inclined impeller blades 442, one side of the impeller blade 442 is curved into an arc surface, a portion of the arc surface faces the first water inlet 402, and the other portion faces the second water inlet 403, so that the impeller blade 442 can be acted upon by the water flow of the second side water inlet 403 and the first top water inlet 402 and drive the impeller shaft 441 to rotate.

[0125] Sewage enters the impeller chamber through the first water inlet 402 and the second water inlet 403, interacts with the rotating impeller body 440, generates a rotating force and a stirring effect, and helps to flush out the impurities remaining in the filter assembly 30. The rotating impeller body 440 not only enhances the rotating force and stirring effect of the water flow, but also guides the water flow to the sewage outlet 102 through its specific impeller blade 442 design, thereby improving the sewage discharge efficiency and cleanliness. The drain outlet 404 is set at the bottom or side of the mounting seat 410 (usually opposite to the sewage outlet 102) to facilitate the discharge of sewage.

[0126] In one embodiment, the chassis 511 is also provided with a second discharge port 504 extending axially therethrough, and a water retaining structure is formed on opposite sides of the exoskeleton 50 and the mounting seat 410, the water retaining structure being arranged around the first discharge port 503, and the second discharge port 504 is located on the outer periphery of the water retaining structure for being connected to the second water inlet 403.

[0127] For more details, please refer to Figure 8 , Fig.15 and Fig.16 The bottom of the outer frame 50 is provided with a water retaining ring 514, and the mounting seat 410 is provided with a water retaining ring 424. The water retaining ring 514 and the water retaining ring 424 cooperate to form a water retaining structure. The siphon flow channel 501 and the first water inlet 402 are connected at the inner periphery of the water retaining structure, and the filter water cavity 101 at the outer periphery of the filter assembly 30 is connected to the second water inlet 403 at the outer periphery of the water retaining structure through the second discharge port 504. Further, the mounting seat 410 is provided with second water inlets 403 on both opposite sides. When draining, the water in the filter bottle 10 other than the siphon flow channel 501 can enter from these two second water inlets 403. Four first water inlets 402 inclined in the same direction are designed on the mounting seat 410, and the water flowing out of the siphon flow channel 501 enters the impeller cavity through the first water inlet 402.

[0128] In one embodiment, 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.

[0129] In this embodiment, at least one of the drain port 404 and the water inlet is the first flow port 104, and the plugging portion 731 is further provided with a second flow port 7311, and the first flow port and the second flow port 7311 are staggered, without loss of generality, and the second flow port 7311 axially penetrates the plugging portion 731. Of course, in other embodiments, the plugging portion 731 may not be provided with a flow port, or the first flow port may be formed by other structures in the filter bottle 10, and even the sewage outlet 102 may be used as the first flow port for the plugging portion 731 to detachably plug.

[0130] The blocking portion 731 may be located on the inner side of the mounting seat 410. In this case, in the flushing mode, the water flowing into the mounting seat 410 from the water inlet 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 404. The mounting seat 410 may also be located on the outer side of the mounting seat 410. In this case, the second flow opening 7311 may be located upstream of the water inlet, or downstream of the drain 404. In addition, the blocking portion 731 may be provided corresponding to one of the water inlet and the drain 404 to detachably block one of the water inlet and the drain 404, or may be capable of simultaneously blocking the water inlet and the drain 404, and can move relative to the mounting seat 410 to a position where the water inlet and the drain 404 are simultaneously opened.

[0131] When the blocking portion 731 blocks the first flow port 104 through the solid structure around the second flow port 7311, the solid 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, 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.

[0132] In the flushing mode, the water inlet and the drain port 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, and reduce the possibility of blockage of the filter component 30, thereby ensuring the filtering effect of the filter component 30.

[0133] In one embodiment, please refer to Figure 5 and Figure 8, the connecting portion 732 is provided through the impeller body 440, one end is fixedly connected to the blocking portion 731, and the other end is transmission-connected to the reversing member 720. That is, the blocking portion 731 is located on the side of the impeller body 440 away from the filter assembly 30, and a through hole is provided on the impeller shaft 441 of the impeller body 440, and the connecting portion 732 is provided through the through hole, and is connected to the reversing member 720 on the other side of the impeller body 440. In this way, the through hole on the impeller shaft 441 can provide a guiding effect for the connecting portion 732 to ensure that the movable member 730 can stably move between different positions. At the same time, the connecting portion 732 can provide a supporting effect for the impeller body 440, and the impeller body 440 can rotate smoothly around the connecting portion 732. Of course, in other embodiments, it can also be that the blocking portion 731 is provided between the mounting seat 410 and the outer frame 50, and the connecting portion 732 is connected to the reversing member 720 after passing through the outer frame 50.

[0134] Further, in this embodiment, please refer to Figure 5 and Figure 8 , the connecting portion 732 is also penetrated through the mounting seat 410, the blocking portion 731 and the outer frame 50 are respectively located on the axial sides of the mounting seat 410, the drain port 404 is arranged on the opposite side of the mounting seat 410 and the blocking portion 731, and the blocking portion 731 can be detachably abutted against the side of the mounting seat 410 away from the outer frame 50, and can detachably block the drain port 404. That is, both axial side surfaces of the mounting seat 410 are provided with through holes. The connecting portion 732 penetrates into the through hole of the impeller body 440 from the side of the mounting seat 410 away from the filter assembly 30, and penetrates out from the side of the mounting seat 410 close to the filter assembly 30, and then passes through the outer frame 50, extends into the filter assembly 30 and connects with the reversing member 720. The impeller assembly 40 includes a mounting seat 410 and an impeller body 440, and the blocking portion 731 is located outside the impeller assembly 40, which is conducive to simplifying the structure of the mounting seat 410 and facilitating the modular design of the impeller assembly 40. Of course, in other embodiments, the blocking portion 731 can also be arranged inside the mounting seat 410, and the connecting portion 732 can be sequentially arranged through the impeller body 440, the axial side surface of the mounting seat 410 close to the outer frame 50, and the outer frame 50. In this case, the sealing ring surface 711 corresponds to the inner circumferential surface of the mounting seat 410.

[0135] In one embodiment, please refer to Figure 5 and Figure 8, the pre-filter also includes a reversing bottom shell 710, 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 can be understood that both axial sides of the reversing bottom shell 710 are provided with openings, which do not interfere with the cooperation between the blocking portion 731 and the first flow port and the communication between the second flow port 7311 and the sewage outlet 102. In this embodiment, the sliding cooperation between the reversing bottom shell 710 and the blocking portion 731 can provide a guiding effect for the axial movement of the movable part 730. Specifically, the outer periphery of the blocking portion 731 can be slidably matched with the inner periphery of the reversing bottom shell 710.

[0136] Without loss of generality, the reversing bottom shell 710 is fixedly connected to the mounting seat 410, and the reversing bottom shell 710 and the filter assembly 30 are respectively located on both axial sides of the mounting seat 410. Specifically, the reversing bottom shell 710 can be connected to the mounting seat 410 by means of snap-fit ​​or screw connection. Without loss of generality, for the two sides of the reversing bottom shell 710 distributed along the axial direction, one side is fixedly connected to the mounting seat 410, and the other side abuts against the filter bottle 10, so as to improve the installation stability of the reversing bottom shell 710 in the filter bottle 10, thereby improving the guiding effect on the plugging portion 731 and ensuring the sealing cooperation with the plugging portion 731. Of course, in other embodiments, the reversing bottom shell 710 can also be installed on the filter bottle 10.

[0137] Without loss of generality, the inner circumference of the reversing bottom shell 710 is a sealing annular surface 711, and the blocking portion 731 can be slidably sealed 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, and the inner circumference of the reversing bottom shell 710 can provide a guide for the movement of the blocking portion 731 to ensure that the blocking portion 731 switches smoothly between different positions. Of course, in other embodiments, the sealing annular surface 711 can also be formed by the filter bottle 10, and the sealing annular surface 711 on the filter assembly 30 and the filter bottle 10 can be slidably sealed, or the first flow port that matches the blocking portion 731 can also be formed by the reversing bottom shell 710.

[0138] In one embodiment, see Fig.14The side frame 512 is provided with a water flow driving member 540, and the water flow driving member 540 has a driving surface 544, and the driving surface 544 is set at an angle relative to the circumference of the outer frame 50, so that after the driving surface 544 is subjected to the impact of the water flow, it can drive the outer frame 50 to rotate. In this way, when the driving surface 544 is driven by the water flow, the water flow driving member 540 can generate a driving force on the outer frame 50 in the circumference of the outer frame 50, thereby prompting the outer frame 50 to rotate around its axis, that is, around the axial rotation of the filter assembly 30, so that the kinetic energy of the water flow can be converted into the kinetic energy of the rotation of the outer frame 50 through the driving surface 544, and the rotation of the outer frame 50 is realized, thereby disturbing the water flow in the water filter chamber 101, preventing impurities from being deposited and attached to the filter assembly 30, the outer frame 50 and the side wall of the water filter chamber 101, reducing the possibility of clogging of the filter assembly 30, and thus improving the filtering effect of the filter assembly 30. Furthermore, the water flow can form a vortex after passing through the water distributor 60, thereby providing a greater driving force through the driving surface 544. That is, the water distributor 60 cooperates with the water flow driving member 540 to provide a certain rotation driving force to the exoskeleton 50, and the impeller body 440 itself rotates under the impact of the water flow and links the exoskeleton 50, and can also provide a certain rotation driving force to the exoskeleton 50, and these two rotation driving forces are arranged in the same direction.

[0139] In one embodiment, the water flow drive member 540 is clamped to the end of the side frame 512. The water flow drive member 540 is connected to the end of the side frame 512 by clamping, so that the side frame 512 and the water flow drive member 540 are formed separately, which improves the molding probability and convenience. The side frame 512 and the water flow drive member 540 are connected by clamping, and the connection operation is convenient. At the same time, the water flow drive member 540 can also be kept stable at the end of the side frame 512 to improve production efficiency. Of course, in other embodiments, the water flow drive member 540 can also be connected to the side frame 512 by screwing, melting or integral molding, or the water flow drive member 540 is clamped to the axial middle part of the side frame 512.

[0140] Specifically, in this embodiment, a plurality of water flow driving members 540 are provided on the side frame 512, and the plurality of water flow driving members 540 are spaced apart along the circumference of the outer frame 50. It can be understood that the plurality of water flow driving members 540 are spaced apart at the end of the side frame 512 around the circumference of the outer frame 50, so that the plurality of driving surfaces 544 distributed in the circumference of the outer frame 50 tend to be uniform, and thus the driving force received by the outer frame 50 in the circumference can be balanced, so that the outer frame 50 can rotate at a uniform speed to ensure the cleaning effect of the filter assembly 30. Without loss of generality, in this embodiment, the water flow driving member 540 is provided with a plurality of driving surfaces 544, and the plurality of driving surfaces 544 are uniformly distributed on the water flow driving member 540 along the circumference of the outer frame 50, and the plurality of water flow driving members 540 are uniformly distributed in the circumference of the side frame 512, thereby ensuring that the driving surfaces 544 are uniformly distributed in the circumference of the side frame 512, so as to ensure the rotational stability of the outer frame 50. Of course, in other embodiments, a plurality of water flow driving members 540 may also be distributed along the axial direction of the side frame 512 to balance the rotational stability of the outer frame 50 in the axial direction.

[0141] As for the clamping relationship between the water flow drive member 540 and the side frame 512, in this embodiment, the water flow drive member 540 includes a hanging portion 541, and the hanging portion 541 is hung on the end of the side frame 512 and is clamped with the side frame 512. It can be understood that the water flow drive member 540 is hung from the end of the side frame 512 toward the side frame 512 along the axial direction, and the connection operation is convenient and the connection is stable. After the hanging portion 541 is hung on the side frame 512, the water flow drive member 540 is clamped with the side frame 512. Here, the hanging portion 541 can be clamped on the side frame 512, or other parts of the water flow drive member 540 can be clamped on the side frame 512. In this way, the connection in a hanging manner provides a positioning reference for the connection between the water flow drive member 540 and the side frame 512, and simplifies the connection between the water flow drive member 540 and the side frame 512. In addition, after the hooking portion 541 is hooked to the side wall, a limit is formed on the water flow driving member 540 in the radial direction to prevent the water flow driving member 540 from moving radially relative to the side frame 512. Of course, in other embodiments, the water flow driving member 540 can also be connected to the side wall by plugging, or by turning a knob.

[0142] The water flow driving member 540 also includes a driving body 542 connected to the hanging portion 541, the driving body 542 is hung on the inner side of the side frame 512, the hanging portion 541 is engaged with the outer side of the side frame 512, and the driving surface 544 is formed on the driving body 542. Without loss of generality, the gap between the outer frame 50 and the shell is small, and the gap between the outer frame 50 and the filter assembly 30 is large to ensure the efficiency of filtering the water through the filter assembly 30. In this way, the driving body 542 with the driving surface 544 is arranged on the inner side of the side frame 512 to prevent the tension between the side wall of the water filter chamber 101 and the water flow from affecting the impact force of the water flow on the driving surface 544, thereby ensuring the rotation stability and reliability of the outer frame 50. In addition, since the driving surface 544 is arranged on the driving body 542, the driving body 542 inevitably maintains good flatness in the circumferential direction of the side frame 512. The driving body 542 is arranged on the inner side of the side frame 512, which can ensure the flatness of the outer side of the outer frame 50, avoid the interference of the shell with the rotation of the outer frame 50, and ensure that the driving surface 544 obtains sufficient water flow impact. At the same time, the hanging part 541 is clamped on the outer side of the side frame 512, and the driving body 542 is on the inner side of the side frame 512, balancing the force of the water flow driving member 540 in the inner and outer directions of the side frame 512, thereby ensuring the connection stability of the water flow driving member 540 and the side frame 512. Of course, in other embodiments, when the gap between the side frame 512 and the cavity wall of the water filter cavity 101 is large, the driving body 542 can also be arranged on the outer side of the side frame 512.

[0143] In one embodiment, the driving surface 544 is parallel to the axial direction of the outer frame 50. It can be understood that the driving surface 544 is distributed in the circumferential direction of the side frame 512, and can refer to the arrangement of the guide blades 621 in the water distributor 60, and the water flow is guided to impact the driving surface 544 by the guiding effect of the guide blades 621 on the water flow, or a drainage structure is set on the channel wall between the water inlet 201 and the water flow driving member 540, and the water flow is guided in a vortex shape along the axial direction of the filter assembly 30, so that it can directly impact the driving surface 544 parallel to the axial direction of the outer frame 50, so that the water flow driving member 540 can obtain a larger water flow impact force, improve the rotation speed or rotation efficiency of the outer frame 50, avoid impurities from adhering to the filter assembly 30, ensure the cleanliness of the filter assembly 30, and improve the filtering efficiency of the filter assembly 30 for the water flow. Of course, in other embodiments, the driving surface 544 can also be inclined relative to the axial direction of the outer frame 50, or, relative to the radial direction of the side frame 512.

[0144] In one embodiment, the driving body 542 extends along the circumferential arc of the side frame 512, and a plurality of water baffles 543 are spaced apart, and the driving surface 544 is formed on the water baffles 543. Without loss of generality, the water baffles 543 are protruding from the driving body 542, and the driving surface 544 is formed on the side wall of the water baffles 543 along the circumferential direction of the side frame 512, so that the driving surface 544 can have a certain size in the radial direction, ensuring that the driving surface 544 is stably impacted by the water flow, and at the same time, the driving body 542 extends along the inner circumference of the side frame 512, and the plurality of water baffles 543 are spaced apart in the extension direction of the driving body 542, so as to evenly distribute the driving force in the circumferential direction of the side frame 512, and ensure the stability of the rotation of the exoskeleton 50. In addition, the driving body 542 is arranged in a conformal manner on the inner circumferential wall of the side frame 512, and the two are closely fitted. When the driving body 542 is subjected to force, the inner wall of the side frame 512 can provide a sufficiently stable support for the driving body 542, thereby effectively pulling the side frame 512 to rotate, avoiding shaking between the water flow driving member 540 and the side frame 512, resulting in energy waste, ensuring the rotation efficiency of the outer frame 50, and improving the cleaning effect of the filter assembly 30. Of course, in other embodiments, a driving groove can also be recessed on the driving body 542, and the side groove wall of the driving groove is configured as a driving surface 544.

[0145] In one embodiment, a cleaning structure is further provided on the side frame 512. The cleaning structure and the siphon flow channel 501 are staggered. The cleaning structure can also be provided in multiple groups in the circumferential direction to clean at least one of the inner peripheral wall of the filter bottle 10 and the outer peripheral side of the filter module 300. In the flushing mode, with the rotation of the outer frame 50, the cleaning structure can sweep away impurities on the relevant structure through the cleaning effect, so that the impurities are separated and can be discharged with the water flow, thereby avoiding serious blockage on the filter assembly 30, ensuring the filtering effect of the filter assembly 30, and improving the service life of the pre-filter.

[0146] In one embodiment, please refer to Figure 3 , Figure 5 , Figure 6 and Figure 8 The pre-filter also includes a movable part 730, which is movably disposed in the water filter chamber 101 so that the pre-filter can switch between a filtering mode and a flushing mode. The water inlet 201 and the water outlet 202 are disposed on one side of the movable part 730, and the sewage outlet 102 is disposed on the other side of the movable part 730. The spaces on the opposite sides of the movable part 730 are isolated in the filtering mode and connected in the flushing mode.

[0147] In the technical solution of the present invention, 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 a blocked state and a connected state, thereby switching the pre-filter between a filtering mode and a flushing mode.

[0148] In the filtering mode, the water outlet 202 is open and the sewage outlet 102 is closed. After the raw water entering from the water inlet 201 enters the water filter chamber 101, it is filtered by the filter assembly 30 and 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 assembly 30 in the water filter chamber 101. In this mode, the impurities attached to the filter assembly 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 conduct the space on both sides, so that the water inlet 201 and the sewage outlet 102 can be connected. Among them, when the pre-filter is in the filtering mode, the water inlet 201, the water outlet 202 and the filter assembly 30 can be relatively concentrated on the same side of the movable part 730, so that the raw water can be filtered more efficiently through the filter assembly 30.

[0149] In one embodiment, please refer to Figure 3 , Figure 5 , Figure 7 , Fig. 9 A first flow port 104 is formed in the water filter chamber 101, and a penetration direction of the first flow port 104 is parallel to a penetration direction of the sewage outlet 102. The movable member 730 includes a blocking portion 731, and 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.

[0150] 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.

[0151] 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 arranged, and a through hole eccentric to the rotation axis is arranged 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.

[0152] Without loss of generality, please also refer to Figure 2 , Figure 3 , Figure 6 and Figure 7 The first flow port 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 port 104 close to the filter assembly 30, or on the side of the first flow port 104 close to the sewage outlet 102. Of course, in other embodiments, the sewage outlet 102 can also be used as the first flow port 104.

[0153] Please also refer to Figure 3 , Figure 5 , Figure 7 , Fig. 9 , Fig.12 and Fig.13 A sealing ring surface 711 is arranged in the water filter chamber 101 corresponding to the sealing portion 731, and 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 matched with the sealing ring surface 711 and can move axially relative to the sealing ring surface 711; the axial side 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, and 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 spaces on both sides of the axial direction of the sealing portion 731.

[0154] That is, when the blocking portion 731 blocks the first flow port 104 through the solid structure around the second flow port 7311, the solid structure around the first flow port 104 can block the second flow port 7311, thereby isolating the space on both sides of the movable member 730, and when the blocking portion 731 is separated from the first flow port 104, the spaces 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. In addition, during the movement of the movable member 730, the outer periphery of the blocking portion 731 always maintains a state of sealing and matching with the sealing annular surface 711, which is conducive to ensuring the isolation of the space on both sides of the movable member 730 in the filtering mode, and avoiding water seepage from the side where the water inlet 201 is located to the side where the sewage outlet 102 is located, which affects 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.

[0155] Of course, in other embodiments, the outer periphery of the sealing portion 731 may be matched with the gap between other structures in the water filter chamber 101, and no flow structure is provided on the sealing portion 731. When the sealing portion 731 leaves the first flow port 104, the flow passes through the gap between the outer periphery of the sealing portion 731 and other structures. The sealing portion 731 is 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.

[0156] Without loss of generality, please refer to Figure 5 and Figure 8 , the outer periphery of the blocking portion 731 is sleeved 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 annular surface 711. In this way, the blocking portion 731 can achieve a sealing fit between the outer periphery and the sealing annular surface 711 through the sealing member, and the sealing member can be filled between the outer periphery of the blocking portion 731 and the sealing annular 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 annular 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 annular surface 711 are sealed and matched.

[0157] Furthermore, if Fig.17As shown, there are a plurality of first flow openings 104 distributed at intervals along the circumference of the water filter chamber 101. That is, more than two first flow openings 104 are distributed at intervals in the circumferential direction, so that the range of the flow area can be effectively increased. The plurality of 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, that is, a relatively concentrated flow area with a certain amount of coverage can be formed in the water filter chamber 101, which is conducive to ensuring that the water flows smoothly through the first flow opening 104. Of course, in other embodiments, it is also possible that only one first flow opening 104 is provided, and the blocking portion 731 covers the end side of the first flow opening 104, or the blocking portion 731 enters the first flow opening 104, and the sealing ring 1002 provided on the outer peripheral side cooperates with the inner peripheral seal of the first flow opening 104, thereby achieving the blocking of the first flow opening 104.

[0158] Furthermore, if Fig.12 and Fig.13 As shown, there are a plurality of second flow openings 7311 spaced apart along the circumference of the water filter chamber 101. That is, more than two second flow openings 7311 are spaced apart along the circumferential direction on the blocking portion 731, so that the range of the flow area can be effectively increased. The plurality of second flow openings 7311 should be distributed around the center of the blocking portion 731 so that the flow area is relatively concentrated, that is, 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 the water flows smoothly through the second flow openings 7311, and the blocking portion 731 does not need to have a second flow opening 7311 with a large area, which is conducive to ensuring the structural strength of the blocking portion 731. Furthermore, the plurality of second flow openings 7311 can be evenly spaced apart 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 both sides 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.

[0159] Furthermore, 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, so that 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, that is, the water inlet 201 and the sewage outlet 102 can be separated, and when the blocking portion 731 leaves 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 direction and the radial direction, 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 fast.

[0160] Furthermore, the first flow opening 104 and the second flow opening 7311 are distributed in plurality at intervals 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 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 staggered in the axial direction, and the position of a second flow opening 7311 in the circumferential direction is correspondingly located 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 capacities of multiple first flow openings 104 and multiple second flow openings 7311 are equivalent, thereby ensuring the smooth flow of water to the sewage outlet 102.

[0161] Without loss of generality, the movable member 730 and the reversing member 720 are connected in transmission, so that the movable member 730 and the reversing member 720 can be linked, and while the flow path of the water inlet 201 and the filter assembly 30 is switched by the reversing member 720, the connection relationship between the sewage outlet 102 and the water inlet 201 can also be changed by the movable member 730. Of course, in other embodiments, the reversing member 720 and the movable member 730 may not be connected in transmission, but may be driven by different driving sources respectively, and cooperate with each other to form a flushing flow path and a filtering flow path.

[0162] In one embodiment, 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 a 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, and the side of the movable member 730 close to the water inlet 201 will be subjected to pressure, so that the movable member 730 moves 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, and at the same time, the elastic member 1003 will undergo elastic deformation. When the pre-filter switches from the flushing mode to the filtering mode, the sewage outlet 102 is closed, the water outlet 202 is opened, and the elastic member 1003 will restore 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 spaces on both sides. Thereafter, in the absence of external force, the movable member 730 can be stably in the current position to provide a stable working environment for the filtering process of the pre-filter.

[0163] Of course, in other embodiments, the mode switching of the pre-filter may be controlled by other driving methods, such as manually twisting a screw rod. The user can switch the pre-filter to different modes by twisting the screw rod in different directions.

[0164] In one embodiment, please refer to Figure 3 , Figure 4 , Figure 6 and Figure 7 , the two ends of the elastic member 1003 are respectively connected to the switching member 720 and the filter assembly 30. Specifically, the elastic member 1003 is arranged between the switching member 720 and the filter assembly 30, so that one end of the elastic member 1003 is connected to the switching member 720, and the other end is connected to the filter assembly 30, thereby facilitating the installation of the elastic member 1003. Among them, the other end of the elastic member 1003 can be connected to the filter part of the filter assembly 30, and can also be connected to the water distributor 60.

[0165] The elastic member 1003 can be configured as a spring, so as to facilitate the installation of the elastic member 1003 and reduce the interference of the elastic member 1003 with the water flow inside the water filter chamber 101. In other embodiments, the elastic member 1003 can also be configured as an elastic block or an elastic sleeve, in which case, the elastic member 1003 is provided with an escape space for the water flow to pass through.

[0166] Furthermore, the elastic member 1003 is installed between the reversing member 720 and the water distributor 60. Specifically, because water needs to flow between the filter portion of the filter assembly 30 and the reversing member 720, especially in the flushing mode, the reversing member 720 sprays water from the inner periphery of the filter assembly 30 to the outside thereof to flush the filter assembly 30, the presence of the elastic member 1003 may affect the impact strength of the water flow, and therefore, the elastic member 1003 is arranged between the reversing member 720 and the water distributor 60.

[0167] Furthermore, one end of the elastic member 1003 is located inside the annular main body 7221, which helps to ensure the stable installation of the elastic member 1003, reduce the possibility of accidents of the elastic member 1003, and further reduce the interference of the elastic member 1003 on the water flow inside the water filter chamber 101. In other embodiments, the elastic member 1003 can also be arranged on the outside of the annular main body 7221. In this case, one end of the elastic member 1003 facing the connecting portion 721 can be sleeved on the annular main body 7221, thereby facilitating the annular main body 7221 to guide the elastic member 1003 to extend and contract. At this time, there may be no direct connection between the elastic member 1003 and the baffle skirt 7222, and one end of the elastic member 1003 abuts against the side of the baffle skirt 7222 facing the water distributor 60.

[0168] In one embodiment, a water flow portion 7224 is provided on the inner circumference of the annular main body portion 7221, and the water flow portion 7224 is provided with a second connecting hole 7225, and the first water flow space 610 has a blocking portion protruding toward the water isolation ring 210; in the filtering mode, the water flow portion 7224 and the blocking portion are spaced apart; in the flushing mode, the blocking portion abuts against the water flow portion 7224 on the side of the second connecting hole 7225 away from the water isolation ring 210.

[0169] Specifically, the first water flow space includes a portion located at the outer periphery of the blocking portion and a portion located at the inner periphery of the blocking portion. The hollow tube section 723 is inserted from the inner periphery of the blocking portion 604 to the inner periphery of the filter module 300. In the filtering mode, please refer to Figure 3 and Figure 4 The blocking portion 604 and the water passing portion 7224 are arranged at intervals, so that the inner periphery of the filter assembly 30 can be connected to the second connecting hole 7225 through the first water passing space 610, thereby facilitating the filtered raw water to flow into the inner periphery of the reversing member 720. In the flushing mode, please refer to Figure 7 and Figure 8 The blocking portion 604 abuts against the water passing portion 7224 at the side of the second communicating hole 7225 away from the water isolation ring 210 , thereby blocking the communication between the second communicating hole 7225 and the inner periphery of the filter assembly 30 .

[0170] In the flushing mode, the reversing member 720 sprays water to the inner periphery of the filter assembly 30 through the first connecting hole to flush the filter assembly 30, so sufficient water pressure is required. If the inner periphery of the reversing member 720 is connected to the inner periphery of the filter assembly 30 through the second connecting hole 7225, it may cause the dispersion of the water flow, affecting the impact effect of the water flow on the filter assembly 30. Therefore, by blocking the connection between the second connecting hole 7225 and the inner periphery of the filter assembly 30, the inner periphery of the hollow pipe section is directly connected to the inner periphery of the filter assembly 30 through the first connecting hole to ensure the impact force of the water flow. In the filtering mode, the second connecting hole 7225 can increase the water flow area of ​​the water flow portion 7224, thereby increasing the water output of the inner periphery of the filter assembly 30.

[0171] The bottom of the mounting ring groove 602 is provided with a blocking portion 604 protruding inwardly. The blocking portion 604 can abut against the lower edge of the second connecting hole 7225 in the flushing mode to block the communication between the second connecting hole 7225 and the inside of the filter assembly 30, thereby blocking the second connecting hole 7225 in the flushing state. If the blocking portion 604 blocks the communication between the second connecting hole 7225 and the inner circumference of the filter assembly 30 by blocking the second connecting hole 7225, once the circumferential offset occurs between the water distributor 60 and the reversing member 720, it may cause the blocking portion 604 to be unable to be smoothly inserted into the second connecting hole 7225, thereby causing the blocking portion 604 to fail. Therefore, the blocking portion 604 is arranged to abut against the lower edge of the second connecting hole 7225, thereby eliminating the gap between the water passing portion 7224 and the blocking portion 604 to block the water flow.

[0172] Furthermore, one end of the elastic member 1003 is sleeved on the water passing portion 7224, and the other end is sleeved on the blocking portion 604. Thus, both opposite ends of the elastic member 1003 have guide structures, thereby improving the installation stability of the elastic member 1003.

[0173] It should be noted that the multiple indicated in this solution, unless otherwise specified, should be understood as greater than or equal to two.

[0174] The present invention also proposes a water system, which includes a pre-filter. The specific structure of the pre-filter refers to the above embodiment. Since the water system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the water system at least includes related components from the pre-filter to the water end. For example, the water system can include household appliances such as water heaters, dishwashers, and water dispensers, and can also include accessories such as water pipes for domestic water in the whole house.

[0175] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention and the drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pre-filter, characterized in that: include: A valve head and a filter bottle, wherein the filter bottle is formed with a water filter cavity, the valve head is provided with a water inlet and a water outlet connected to the water filter cavity, and a sewage outlet connected to the water filter cavity is provided on a side of the filter bottle away from the valve head; A filter assembly is fixedly installed in the water filter cavity, the filter assembly includes a filter module, the filter module includes a support frame and a filter element, the support frame has a first water pass side located on one side in the axial direction and a second water pass side surrounding in the circumferential direction, and the filter element is arranged on the second water pass side; as well as The reversing member is hollow, the inner circumference 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 in the filter assembly so that the pre-filter can switch between a filtering mode and a flushing mode, and the flushing flow path between the water inlet and the reversing member is connected through the connecting portion and cut off through the blocking portion.

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

3. The pre-filter according to claim 2, characterized in that: The filter assembly comprises a water distributor, the water distributor is located at one end of the filter assembly close to the water isolation ring, and the water isolation ring and the water distributor are arranged at intervals; In the filtering mode, the baffle is at least located between the water isolation ring and the water distributor; In the flushing mode, the connecting portion is at least partially located between the water isolation ring and the water distributor.

4. The pre-filter according to claim 1, characterized in that: The valve head is provided with a water-isolating ring between the water inlet and the water outlet, and the filter assembly also includes a water distributor connected to the axial side of the filter module, the water distributor has a first water flow space corresponding to the first water flow side and a second water flow space corresponding to the second water flow side, and the second water flow space is provided with a guide vane, one end of the reversing member is connected to the water-isolating ring, and the other end extends into the filter module through the first water flow space.

5. The pre-filter according to claim 4, characterized in that: The reversing member also 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 plug-fitted with the water isolation ring, the blocking portion is plug-fitted with the water distributor, and the hollow pipe section extends into the filter module.

6. The pre-filter according to claim 5, characterized in that: The peripheral wall of the hollow tube section is provided with a first communicating hole, the outer periphery of the hollow tube section and the inner periphery of the filter assembly are sealed and matched, and the matching point of the two is located at one end of the first communicating hole away from the baffle portion.

7. The pre-filter according to claim 6, characterized in that: The filter assembly also includes an end cover, which includes a cylindrical portion and a limiting ring portion arranged around the cylindrical portion, the limiting ring portion is connected to the side of the filter module away from the water distributor, the cylindrical portion is inserted into the interior of the filter module, and the outer periphery of the hollow pipe segment and the inner periphery of the cylindrical portion are sealed and matched.

8. The pre-filter according to claim 4, characterized in that: The baffle portion includes an annular main body extending along the axial direction of the reversing member and a baffle skirt arranged around the outer circumference of the annular main body. The annular main body is inserted in the first water flow space and can be detachably sealed in the second water flow space.

9. The pre-filter according to claim 8, characterized in that: The inner periphery of the annular main body is provided with a water passing portion, the water passing portion is provided with a second connecting hole, and the first water passing space has a blocking portion protruding toward the water isolation ring; In the filtering mode, the water passing part and the blocking part are arranged at intervals; In the flushing mode, the blocking portion abuts against the water flow portion at a side of the second communicating hole away from the water isolation ring.

10. The pre-filter according to claim 9, characterized in that: An elastic member is provided between the reversing member and the water distributor, one end of the elastic member is sleeved on the water passing portion, and the other end is sleeved on the blocking portion. Under the action of the elastic member, the reversing member can naturally maintain a position corresponding to the filtering mode.

11. The pre-filter according to claim 1, characterized in that: The pre-filter also includes a movable part, the water inlet, the water outlet and the filter assembly are arranged on one side of the movable part, the sewage outlet is arranged on the other side of the movable part, and the movable part is provided with a second flow port. In the flushing mode, the two ends of the second flow port are respectively connected to the space on both sides of the movable part. In the filtering mode, the second flow port is blocked so that the space on both sides of the movable part is separated.

12. The pre-filter according to claim 11, characterized in that: The pre-filter also includes an exoskeleton and an impeller assembly arranged in the water filter chamber, the exoskeleton is rotatably mounted outside the filter assembly, the impeller assembly includes a mounting seat fixedly mounted in the water filter chamber and an impeller body rotatably mounted in the mounting seat, the impeller body is fixedly connected to the exoskeleton in the circumferential direction, the mounting seat is provided with a connected water inlet and a drain, at least one of the drain and the water inlet is a first flow port, the movable part includes a sealing portion, the axial side surface of the sealing portion can be detachably sealed from the first flow port, and the second flow port and the first flow port are staggered.

13. The pre-filter according to claim 12, characterized in that: A sealing annular surface is arranged in the water filtering cavity corresponding to the sealing portion, and the outer periphery of the sealing portion is sealed to fit the sealing annular surface and can move relative to the sealing annular surface along the axial direction.

14. The pre-filter according to claim 13, characterized in that: The pre-filter also includes a reversing bottom shell fixedly connected to the mounting seat, the reversing bottom shell and the outer frame are respectively located on both axial sides of the mounting seat, the inner circumferential 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.

15. The pre-filter according to claim 12, characterized in that: The exoskeleton is formed with a siphon flow channel, the exoskeleton includes a chassis and a side frame, 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 a second discharge port penetrating along the axial direction, the exoskeleton and the mounting seat are formed with a water retaining structure on opposite sides, the water retaining structure is arranged around the first discharge port, and the second discharge port is located at the periphery of the water retaining structure; The water inlet includes a first water inlet arranged on one axial side of the mounting seat and a second water inlet arranged on a circumferential side of the mounting seat, the first discharge port is connected to the first water inlet, and the second discharge port is connected to the second water inlet.

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

17. The pre-filter according to claim 16, characterized in that: The water flow driving component includes a hanging part and a driving body, the hanging part is hung on the end of the outer frame close to the water inlet, the driving body is arranged in a conformal manner with the inner circumferential wall of the outer frame, the driving body extends along the circumferential arc of the outer frame, and has a plurality of water baffles distributed at intervals, and the driving surface is formed on the water baffles.

18. The pre-filter according to claim 1, characterized in that: The filter element is in a straight cylindrical shape.

19. The pre-filter according to claim 1, characterized in that: The filter element is sleeved outside the support frame, and the support frame includes a main body and an additional part distributed along the axial direction. A sealing ring is sleeved on one end of the main body away from the additional part, and a sealing ring is also sleeved on the additional part. Both ends of the filter element are sealed and matched with the support frame through a sealing ring.

20. A water system, characterized in that: The pre-filter comprises the pre-filter according to any one of claims 1 to 19.

Images