Pre-filter and water system

Abstract

The invention discloses a pre-filter and a water system, and relates to the technical field of filters. Wherein the pre-filter comprises a valve head, a filter bottle, a filter assembly, an outer framework, a reversing piece and a movable piece, the outer framework is rotatably arranged outside the filter assembly in a sleeving manner, the reversing piece and the movable piece are in transmission connection and are movably arranged, so that the pre-filter can be switched between a filtering mode and a flushing mode, the reversing piece can switch flow paths, and the valve head is connected with the valve bottle. The reversing part and the movable part are arranged in the filtering mode, the movable part can switch on and off of the spaces on the two sides, at least one of the reversing part and the movable part is connected with an elastic part, and under the action of the elastic part, the reversing part and the movable part can be naturally maintained at the positions corresponding to the filtering mode. 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 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 the pre-filter is equipped with components such as a filter assembly, 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 assembly, which will clog the filter assembly over time and reduce the filtering effect of the filter assembly. 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 and an outer frame are arranged in the water filter cavity, and the outer frame is rotatably sleeved outside the filter assembly; and

[0007] A reversing member and a movable member connected in a transmission manner, wherein the reversing member can be movably inserted in the filter assembly so that the pre-filter can be switched between a filtering mode and a flushing mode;

[0008] 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 water inlet, the water outlet and the filter assembly are arranged on one side of the movable member, and the sewage outlet is arranged on the other side of the movable member;

[0009] In the filtering mode, the flushing flow path between the water inlet and the reversing member is cut off by the blocking portion, and the space on the opposite sides of the movable member is separated;

[0010] In the flushing mode, the flushing flow path between the water inlet and the reversing member is connected through the baffle, and the spaces on opposite sides of the movable member are connected;

[0011] At least one of the switching member and the movable member is connected with an elastic member, and under the action of the elastic member, the switching member and the movable member can naturally maintain a position corresponding to the filtering mode.

[0012] In one embodiment, the exoskeleton is provided with a water flow driving member, and the water flow driving member has a driving surface, and the driving surface is arranged at an angle relative to the circumference of the exoskeleton, so that the driving surface can drive the exoskeleton to rotate after being impacted by the water flow.

[0013] 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.

[0014] In one embodiment, the exoskeleton includes a side frame and a chassis, the chassis is connected to the side frame and is located on a side away from the valve head, the exoskeleton forms a siphon channel, the side frame is provided with a siphon hole connected to the siphon channel, the chassis is provided with a discharge port connected to the siphon channel, and the discharge port is connected to the sewage outlet at least in the flushing mode.

[0015] In one embodiment, the chassis is provided with a shielding portion, the movable part includes a sealing portion and a connecting portion arranged on a side of the sealing portion away from the sewage outlet, the water inlet and the sewage outlet are arranged on both axial sides of the sealing portion, the movable part is provided with a flow port, the water outlet side of the flow port penetrates to a side of the sealing portion close to the sewage outlet, the water inlet side of the flow port extends axially to the connecting portion, and radially penetrates the radial side surface of the connecting portion, and in the filtering mode, the shielding portion blocks the water inlet side of the flow port.

[0016] In one embodiment, the connecting portion is axially movable so that the shielding portion can be detachably blocked on the water inlet side of the flow opening.

[0017] In one embodiment, the shielding portion is annular, and the water inlet side of the flow port is accommodated in the shielding portion in the filtering mode, and is at least partially exposed to the outside in the flushing mode.

[0018] In one embodiment, the shielding portion is protruding from a side of the bottom plate close to the sewage outlet, and in the filtering mode, the discharge outlet and the water inlet side of the flow port are respectively located on two opposite sides of the shielding portion.

[0019] In one embodiment, a mounting protrusion is protrudingly provided on one side of the blocking portion close to the sewage outlet, and the mounting protrusion is sleeved with a second elastic member.

[0020] In one embodiment, the mounting protrusion and the connecting portion are coaxially arranged, and the water outlet side of the flow port passes through the mounting protrusion.

[0021] In one embodiment, a reversing bottom shell is connected to a side of the outer frame close to the sewage outlet, the blocking portion is located in the reversing bottom shell, and the connecting portion extends into the outer frame.

[0022] In one embodiment, the outer peripheral side of the blocking portion is sealingly fitted to the inner peripheral side of the reversing bottom shell.

[0023] In one embodiment, the filter assembly includes a plurality of filter modules connected in sequence, a water flow cavity is formed inside the filter module, a first water flow port connected to the water flow cavity is provided in the axial direction of the filter module, a second water flow port connected to the water flow cavity is provided in the circumferential direction of the filter module, a filter element is provided in the second water flow port, the filter element is arranged in a ring shape, and has an inner ring edge and an outer ring edge, and the outer ring edge is located on one axial side of the inner ring edge.

[0024] In one embodiment, a plurality of cleaning brushes are convexly disposed on the inner circumference of the outer frame and distributed along the axial direction of the outer frame, one cleaning brush is disposed corresponding to one filter element, and the cleaning brush is disposed obliquely toward the filter element.

[0025] In one embodiment, the inner annular edges and the outer annular edges of two adjacent filter elements are distributed in opposite directions, and the extension directions of two adjacent cleaning brushes in the axial direction of the outer skeleton are opposite.

[0026] In one embodiment, the filter module includes two support frames distributed along the axial direction, the water passage cavity is formed between the two support frames, each support frame is provided with the second water passage, and the inner ring edge and the outer ring edge of two adjacent filter elements are distributed in opposite directions.

[0027] In one embodiment, the supporting skeleton includes an oblique supporting portion, the two ends of the oblique supporting portion are respectively connected to a first ring portion and a second ring portion, the two oblique supporting portions of the same filter module are connected through the second ring portion, the first water outlet is provided on the inner periphery of the first ring portion, and the second water outlet is provided on the oblique supporting portion.

[0028] In one embodiment, each of the supporting frames is provided with the second ring portion, the two second ring portions of the same filter module are detachably connected, and the first ring portions of two adjacent filter modules are detachably connected.

[0029] 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, and the water outlet is connected to the inner peripheral side of the water isolating ring;

[0030] The filter assembly includes a water distributor and a filter module, wherein the water distributor is connected to a side of the filter module close to the water isolation ring;

[0031] A water passage cavity is formed inside the filter module, a first water passage port communicating with the water passage cavity is provided in the axial direction of the filter module, a second water passage port communicating with the water passage cavity is provided in the circumferential direction of the filter module, and a filter element is provided in the second water passage port;

[0032] The water distributor and the water isolation ring are arranged opposite to each other and spaced apart in the axial direction, the water distributor has a first water flow space arranged corresponding to the first water flow port and a second water flow space arranged corresponding to the second water flow port, and the second water flow space is provided with guide blades inclined relative to the circumferential direction;

[0033] The connecting portion and the blocking portion are distributed along the axial direction, the connecting portion is plug-fitted with the water isolation ring, and the blocking portion is plug-fitted with the water distributor. In the filtering mode, the axial sides of the blocking portion are respectively connected to the water distributor and the water isolation ring, and are respectively connected to the first water flow space and the inner circumference of the water isolation ring, and are separated from the second water flow space. In the flushing mode, the connecting portion is at least partially located between the water distributor and the water isolation ring, and the blocking portion covers the second water flow space.

[0034] In one embodiment, a first elastic member is provided between the reversing member and the water distributor.

[0035] In one embodiment, the switching member further includes a hollow pipe section, the connecting portion, the blocking portion and the hollow pipe section are sequentially distributed along the axial direction, and the hollow pipe section extends into the filter module.

[0036] In one embodiment, the movable part includes a blocking portion and a connecting portion provided on a side of the blocking portion away from the sewage outlet, and the hollow pipe section is fixedly connected to the connecting portion.

[0037] In one embodiment, the barrier portion includes an annular main body portion extending axially along the reversing member, and a barrier skirt arranged on the outer periphery of the annular main body portion, the connecting portion and the annular main body portion are distributed axially, and the annular main body portion and the water distributor can be movably plugged into each other.

[0038] In one embodiment, a first mounting ring groove is provided on the outer circumference of the first water flow space, a second mounting ring groove is provided on the inner circumference of the annular main body, and the elastic member includes a first elastic member, one end of the first elastic member is installed in the first mounting ring groove, and the other end is installed in the second mounting ring groove.

[0039] The present invention also provides a water use system, comprising the aforementioned pre-filter.

[0040] In the technical solution of the present invention, the pre-filter is of backwash type, and the switching between different positions by the switching member and the movable member can effectively ensure the working performance of the pre-filter in different working modes. Due to the transmission between the movable member and the switching member, while the flow path of the water inlet and the filter assembly is switched by the switching member, the connection relationship between the sewage outlet and the water inlet can be changed by the movable member, so that the pre-filter can form a filtering flow path and a flushing flow path in the filtering mode and the flushing mode respectively. In the flushing mode, the pre-filter can regularly clean the impurities attached to the filter assembly through the flushing flow path, thereby ensuring the filtering effect of the filter assembly and improving the service life of the pre-filter. At the same time, under the action of the elastic member, when the pre-filter is in the filtering mode, the switching member and the movable member can stably maintain the current position to provide a stable filtering working environment for the pre-filter, and when the pre-filter is in the flushing mode, when the driving force applied by the outside disappears, the switching member and the movable member can spontaneously return to the position corresponding to the filtering mode, so as to facilitate the switching of the pre-filter back to the filtering mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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.

[0042] Figure 1 A schematic structural diagram of an embodiment of a pre-filter provided by the present invention;

[0043] Figure 2 A schematic cross-sectional structure diagram of an embodiment of the pre-filter provided by the present invention in filtering mode;

[0044] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0045] Figure 4 for Figure 2 A partial enlarged view of point B in the middle;

[0046] Figure 5 A schematic cross-sectional structure diagram of an embodiment of the pre-filter provided by the present invention in a flushing mode;

[0047] Figure 6 for Figure 5 A partial enlarged view of point C in the middle;

[0048] Figure 7 for Figure 5 A partial enlarged view of point D in the middle;

[0049] Figure 8 A schematic structural diagram of an embodiment of an exoskeleton of a pre-filter provided by the present invention;

[0050] Fig. 9 for Figure 8 A schematic diagram of the structure of the exoskeleton from another perspective;

[0051] Fig.10 A schematic diagram of the assembly structure of the movable part, the reversing part and the filter assembly of the pre-filter provided by the present invention;

[0052] Fig.11 for Fig.10 A schematic structural diagram of an embodiment of a commutator in FIG.

[0053] Fig.12 for Fig.10 A schematic diagram of the local structure of the moving parts in FIG.

[0054] Fig.13 for Fig.12 A schematic diagram of the structure of the local structure of the moving parts in another perspective;

[0055] Fig.14 for Fig.10 A schematic diagram of the connection structure of two filter modules of a filter assembly in an embodiment;

[0056] Fig.15 for Fig.10 A schematic diagram of the connection structure of two filter modules of another embodiment of the filter assembly;

[0057] Fig.16 for Fig.10 An exploded structural diagram of an embodiment of a filtering module in FIG.

[0058] Fig.17 for Fig.10 A structural schematic diagram of an embodiment of a filter assembly in FIG.

[0059] Fig.18 A schematic structural diagram of an embodiment of a water distributor and an outer frame of a pre-filter provided by the present invention.

[0060] Description of Figure Numbers:

[0061] 10. filter bottle; 101. water filter chamber; 102. sewage outlet;

[0062] 20, valve head; 201, water inlet; 202, water outlet; 203, water isolation ring;

[0063] 30. Filter assembly; 300. Filter module; 301. First connection structure; 302. Second connection structure;

[0064] 310, supporting frame; 311, oblique supporting portion; 312, first ring portion; 313, second ring portion;

[0065] 320, filter element;

[0066] 330, first water outlet; 340, water passage cavity; 350, second water outlet;

[0067] 50. Exoskeleton;

[0068] 501, siphon flow channel; 501a, side wall flow channel; 501b, bottom flow channel; 503, discharge port; siphon hole, 531;

[0069] 511, chassis; 512, side frame; 550, shielding part;

[0070] 540, water flow driving member; 541, hanging part; 542, driving body; 543, water baffle; 544, driving surface;

[0071] 60, water distributor; 610, first water flow space; 620, second water flow space; 621, guide vane; 630, first mounting ring groove;

[0072] 710, reversing bottom shell; 711, sealing ring surface;

[0073] 720, reversing member; 721, connecting portion; 722, blocking portion; 7221, reversing main body; 7222, blocking skirt; 723, hollow pipe section; 724, second mounting ring groove;

[0074] 730, movable part; 731, blocking part; 7311, flow outlet; 7312, mounting protrusion; 732, connecting part; 734, sealing part; 7301, water inlet side; 7302, water outlet side;

[0075] 80. sewage discharge assembly; 810. connecting piece; 820. sewage discharge valve;

[0076] 90. Cleaning brush;

[0077] 1001, fastener; 1003, first elastic member; 1004, second elastic member.

[0078] 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

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] See also Figures 1 to 7 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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).

[0089] 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.

[0090] 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.

[0091] In one embodiment, please refer to Figures 14 to 16 The filter assembly 30 includes a filter module 300, a water passage cavity 340 is formed inside the filter module 300, a first water passage port 330 connected to the water passage cavity 340 is provided in the axial direction of the filter module 300, a second water passage port 350 connected to the water passage cavity 340 is provided in the circumferential direction of the filter module 300, and the filter module 300 includes a filter element 320 arranged at the second water passage port 350, and the filter element 320 is at least partially inclined. It can be understood that in the filtering mode, the raw water will enter the water passage chamber 340 through the second water passage 350 on the peripheral side of the filter module 300, so that the impurities in the raw water can be filtered by the filter element 320, and finally the clean water flows from the first water passage 330 on the axial side of the filter module 300 to the water outlet 202. Since the filter element 320 is at least partially inclined, the filtering area of ​​the filter element 320 can be increased at the same axial height, which means that at the same flow rate, the filter element 320 of this scheme can withstand a larger flow load and improve the filtering efficiency. Moreover, since the filtering area of ​​the filter element 320 of this scheme is large enough, even if a local area of ​​the filter element 320 is blocked, the remaining area of ​​the filter element 320 can continue to withstand a larger flow load, which helps to extend the service life of the filter module 300, reduce the replacement frequency, and thus reduce maintenance costs.

[0092] It can be understood that in the filtering flow path of the pre-filter, the second water port 350, the water cavity 340 and the first water port 330 are sequentially distributed along the upstream and downstream. That is, when the pre-filter is in the filtering mode, the water flow entering from the water inlet 201 will flow to the water outlet 202 through the second water port 350, the water cavity 340 and the first water port 330 in sequence, that is, the water flow will flow from the outside of the filter module 300 to the inside of the filter module 300; and when the pre-filter is in the flushing mode, since the pre-filter is a backwashing type, the flow direction of the water flow will change for the filter module 300, and the water flow will flow from the inside of the filter module 300 to the outside of the filter module 300, that is, the water flow will flow from the inside of the filter cavity 340 through the second water port 350 to the filter cavity 101 on the outer peripheral side of the filter module.

[0093] Without loss of generality, the filter element 320 is annular and has an inner ring edge and an outer ring edge, and the outer ring edge is located on one side of the inner ring edge in the axial direction, that is, the inner ring edge and the outer ring edge are not at the same height in the axial direction, so that the filter element 320 maintains an inclined shape in the circumferential direction. In this way, the filtering area of ​​the filter element 320 can be further increased, so as to further increase the flow load that the filter element 320 can withstand and improve the filtering efficiency.

[0094] In one embodiment, if Fig.10 and Fig.17 As shown, the filter assembly 30 includes a plurality of filter modules 300. The provision of a plurality of filter modules 300 improves the modularity of the filter assembly 30, and the number of filter modules 300 can be flexibly adjusted according to the model of the pre-filter (for example, but not limited to the size of the filter bottle 10), thereby achieving the effect of adjusting the size of the filter assembly 30, thereby solving the problem of sharing the filter assembly 30 of pre-filters of different models. Since the filtration area on each filter module 300 is fixed, by adjusting the number of filter modules 300, the total filtration area of ​​the filter assembly 30 can also be adjusted, so that a suitable filtration area can be set, thereby achieving the effect of improving the filtration effect.

[0095] Furthermore, the outer side surface of the filter element 320 is set in a conical surface. The design of the conical surface is conducive to the uniform distribution and smooth flow of the fluid, reduces the eddy current and turbulence of the fluid inside the filter module 300, and reduces energy loss. Specifically, the generatrix of the conical surface can be a straight line, or the generatrix of the conical surface can also be a concave arc line that is concave toward the inside of the water cavity 340, or the generatrix of the conical surface can also be a convex arc line that protrudes out of the water cavity 340. In other embodiments, the outer side surface of the filter element 320 can also be a pyramidal surface, and the cross-section of the pyramidal surface is a polygon, so that the filtering area of ​​the filter element 320 can be increased.

[0096] In one embodiment, if Fig.10 and Fig.17 As shown, the filter assembly 30 further includes a water distributor 60 , which is axially connected to the filter module 300 . Specifically, when multiple filter modules 300 are provided, the water distributor 60 is connected to a filter module 300 that is closer to the valve head 20 .

[0097] In one embodiment, see Fig.14 and Fig.15 , the first connection structure 301 and the second connection structure 302 are respectively arranged on both axial sides of the filter module 300, the first connection structure 301 of one filter module 300 is used to be detachably connected with the second connection structure 302 of another filter module 300, so that the two filter modules 300 are fixed, and at least one of the first connection structure 301 and the second connection structure 302 can be detachably connected with the water distributor 60. That is, the structure of detachable connection between the two filter modules 300 is also used for detachable connection with the water distributor 60, so that the modularization degree of the filter assembly 30 can be improved, and the assembly between the various structures of the filter assembly 30 is convenient.

[0098] Among them, it can be that one of the first connecting structure 301 and the second connecting structure 302 is set as a convexity and the other is set as a groove, and the water distributor 60 is correspondingly provided with a convexity or a groove. Of course, it can also be that one of the first connecting structure 301 and the second connecting structure 302 is set as a hook and the other is set as a hook groove, and the water distributor 60 is correspondingly provided with a hook or a hook groove.

[0099] Specifically, the filter module 300 may be provided with a latching protrusion on a side close to the water distributor 60 and a latching groove on a side away from the water distributor 60, and the water distributor 60 may be provided with a latching groove on a side close to the filter module 300. In this way, the water distributor 60 and the filter module 300 as well as two adjacent filter modules 300 may be detachably connected through the cooperation of the latching protrusion and the latching groove, and the same is true for the cooperation of the hook groove and the latching hook.

[0100] In one embodiment, please refer to Figures 14 to 16, the filter module 300 includes two support frames 310 distributed along the axial direction, the water passage cavity 340 is formed between the two support frames 310, each of the support frames 310 is provided with the filter element 320, and the inner ring edge and the outer ring edge of the two adjacent filter elements 320 are distributed in opposite directions. It can be understood that when the radial space in the water filter cavity 101 is constant, compared with the filter module 300 that maintains a tapered shape in one direction, the two filter elements 320 of the same filter module 300 are tapered in opposite directions, which can obtain a larger filtering area. In this way, the present embodiment can make full use of the space in the water filter cavity 101, and form a larger filtering area on the peripheral side of the filter module 300 to ensure that the filter assembly 30 can withstand a larger flow load and improve the filtering efficiency. At the same time, a sufficiently large water passage cavity 340 can be formed in the two support frames 310 to facilitate the flow of water. Of course, in other embodiments, a filter module 300 may also include only one support frame 310 , and the first water outlet 330 , the second water outlet 350 and the water passage cavity 340 are formed on the same support frame 310 .

[0101] In one embodiment, the support frame 310 includes an oblique support portion 311, and the two ends of the oblique support portion 311 are respectively connected to a first ring portion 312 and a second ring portion 313, and the two oblique support portions 311 of the same filter module 300 are connected through the second ring portion 313, and the inner periphery of the first ring portion 312 is provided with the first water outlet 330, and the second water outlet 350 is provided at the oblique support portion 311. In this way, the structural strength of the support frame 310 can be guaranteed, and the connection strength between the two support frames 310 can be guaranteed, so as to ensure the filtering capacity of the filter assembly 30. Of course, in other embodiments, the support frame 310 can also be set to other structural forms.

[0102] Specifically, the inclined support portion 311 includes a plurality of ribs spaced apart along the circumferential direction to form a plurality of second water outlets 350 spaced apart along the circumferential direction. The filter element 320 is stacked on the inclined support portion 311. In this way, the filter element 320 can be provided with sufficient support by the inclined support portion 311. In addition, the total flow area of ​​the second water outlet 350 is relatively large, so that the filter module 300 has sufficient flow capacity.

[0103] Without loss of generality, the outer diameter of the second ring portion 313 is greater than the outer diameter of the first ring portion 312, so that each filter element 320 will be alternately tapered in the upper and lower directions, which can make fuller use of the space in the water filter cavity 101 to provide a larger filtering area, thereby further improving the filtering efficiency of the filter assembly 30. Of course, in other embodiments, the outer diameter of the first ring portion 312 may be greater than the outer diameter of the second ring portion 313, or there may be no definite size relationship between the diameters of the first ring portion 312 and the second ring portion 313.

[0104] In one embodiment, each of the support skeletons 310 is provided with the second ring portion 313, and the two second ring portions 313 of the same filter module 300 are detachably connected. It can be understood that the detachable connection allows the parts to be easily separated without damaging the connector itself or adjacent parts. This feature allows the filter module 300 to be operated quickly and effectively when the support skeleton 310 needs to be repaired or replaced, reducing the difficulty and cost of maintenance. Since the detachable connection is easy to operate, it can greatly save time when the filter module 300 maintains and replaces the support skeleton 310. Moreover, the detachable connection allows the fast replacement of the faulty support skeleton 310, thereby reducing the water outage time of the water system and improving the maintenance efficiency. Secondly, compared with the non-detachable connection, the detachable connection reduces the situation of the overall scrapping of the parts due to the inability to disassemble, and reduces the waste of resources. Furthermore, the detachable connection allows the filter assembly 30 to be inspected and maintained regularly or irregularly to ensure its stability and safety, which helps to timely discover and solve potential safety hazards.

[0105] Further, in some possible connection modes, the two second ring portions 313 are snap-fitted. It can be understood that when the second ring portion 313 is made of plastic or metal, the snap-fit ​​structure can be directly formed on the second ring portion 313, and no additional locking accessories, such as screws, nuts, etc., are required during assembly, thereby reducing manufacturing costs and assembly costs. Moreover, since the snap-fit ​​structure is flexible in design, it can be customized according to the actual needs of the second ring portion 313, reducing material waste and improving material utilization. Secondly, snap-fitting can achieve rapid assembly and disassembly without the need for complex tools and equipment. This greatly improves production efficiency and assembly efficiency, and also facilitates the maintenance and replacement of the filter module 300. Specifically, the snap-fit ​​structure can be a combination of a hook and a hook groove, or a combination of a convex and a groove. Of course, in other embodiments, the two second ring portions 313 may be threadedly connected. Through the tight engagement of the threads, the connection between the two second ring portions 313 has higher tensile and compressive strengths, which can meet the use requirements under various working conditions. After assembly, the connection portion 732 is not easy to loosen and can maintain a stable connection state, thereby ensuring the normal operation of the filter module 300.

[0106] Optionally, in the same filter module 300, the end faces of the two second ring portions 313 abut against each other; it can be understood that in the same filter module 300, the two support skeletons 310 are connected by the two second ring portions 313, and the water passage cavity 340 is formed between the two support skeletons 310. By abutting the end faces of the two second ring portions 313, the two support skeletons 310 can be connected and the water passage cavity 340 can be sealed at the same time, which is beneficial to saving processing steps and improving production efficiency.

[0107] In one embodiment, the first ring portions 312 of two adjacent filter modules 300 are detachably connected, and the specific method of the detachable connection of the two first ring portions 312 can refer to the connection method of the two second ring portions 313, and the connection method between the water distributor 60 and the filter module 300 can also refer to the connection method between the two second ring portions 313. In this way, modular assembly between different filter modules 300 can be facilitated. Furthermore, the end faces of the first ring portions 312 of the two adjacent filter modules 300 are abutted against each other, so that the first water outlets 330 of the two adjacent filter modules 300 can be connected while the connection of the two adjacent filter modules 300 is achieved, which is conducive to saving processing steps and improving production efficiency.

[0108] In one embodiment, if Fig.13 As shown, the water distributor 60 has a first water passage space 610 corresponding to the first water passage 330 and a second water passage space 620 corresponding to the second water passage 350, and a guide vane 621 is provided in the second water passage space 620. The filtration flow path between the water inlet 201 and the outer peripheral side of the filter module 300 can be communicated through the second water passage space 620, and the water flows into the water filter chamber 101 through the second water passage space 620, which can form a vortex to disturb the water flow and prevent impurities from being deposited.

[0109] In one embodiment, please refer to Figure 3 , Figure 4 , Figure 7 and Figure 8 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.

[0110] 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.

[0111] In one embodiment, please refer to Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 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 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 water-passing cavity 340 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.

[0112] 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.

[0113] Please also read Figure 7 and Figure 8 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] In one embodiment, please refer to Figure 3 , Figure 4 , Figure 7 and Figure 8 , 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;

[0118] 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;

[0119] 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 .

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] In one embodiment, please refer to Figure 3 and Figure 5The water distributor 60 and the water-isolating ring 210 are arranged opposite to each other and spaced apart in the axial direction. In the filtering mode, the axial sides of the blocking portion 722 are respectively connected to the water distributor 60 and the water-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.

[0127] 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.

[0128] 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 .

[0129] In one embodiment, please refer to Figure 2 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.

[0130] 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.

[0131] In one embodiment, please refer to Figure 2 , Figure 4 , Figure 5 and Figure 7 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.

[0132] 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.

[0133] In the filtering mode, the water outlet 202 is opened and the sewage outlet 102 is closed. The raw water entering from the water inlet 201 enters the water filter chamber 101, is filtered by the filter component 30, and then flows to the water outlet 202. At this time, the movable part 730 is in a position to separate the space on both sides; in the flushing mode, the water outlet 202 is closed and the sewage outlet 102 is opened. The water flow entering from the water inlet 201 can flush the filter component 30 in the water filter chamber 101. In this mode, impurities attached to the filter component 30 can be cleaned, and then the sewage can flow out through the sewage outlet 102. At this time, the movable part 730 is in a position to conduct the space on both sides, so that the water inlet 201 and the sewage outlet 102 can be connected.

[0134] When the pre-filter is in the filtering mode, the water inlet 201 , the water outlet 202 and the filtering assembly 30 can be relatively concentratedly distributed on the same side of the movable part 730 , so that the raw water can be filtered through the filtering assembly 30 more efficiently.

[0135] In one embodiment, please refer to Figure 2 , Figure 4 , Figure 5 and Figure 7The movable part 730 includes a blocking portion 731 and a connecting portion 732 arranged on the side of the blocking portion 731 away from the sewage outlet 102, the water inlet 201 and the sewage outlet 102 are arranged on both sides of the axial direction of the blocking portion 731, the water outlet side 7302 of the flow port 7311 passes through the side of the blocking portion 731 close to the sewage outlet 102, the water inlet side 7301 of the flow port 7311 extends axially to the connecting portion 732, and radially passes through the radial side of the connecting portion 732, and in the filtering mode, the shielding portion 550 blocks the water inlet side 7301 of the flow port 7311.

[0136] It can be understood that the axial direction of the sealing portion 731 is also the direction perpendicular or approximately perpendicular to its circumferential plane. The water inlet 201, the water outlet 202 and the filter assembly 30 are arranged on the same axial side of the sealing portion 731, and the sewage outlet 102 is located on the other axial side of the sealing portion 731. In the filtering mode, the space on both sides of the movable part 730 is mainly separated by the sealing portion 731, that is, two unconnected spaces are formed on both axial sides of the sealing portion 731.

[0137] It can be understood that the movement of the movable member 730 can change the relative position of the water inlet side 7301 of the flow port 7311 and the shielding portion 550. Figure 4 As shown, in the filtering mode, the position of the movable member 730 will cause the shielding portion 550 to block the water inlet side 7301 of the flow port 7311, and the space on both sides of the axial direction of the blocking portion 731 can be isolated, so that the water inlet 201 and the sewage outlet 102 are not connected to each other; Figure 7 As shown, in the flushing mode, the position of the movable member 730 will make the water inlet side 7301 of the flow port 7311 separate from the shielding portion 550, and the water inlet side 7301 of the flow port 7311 will also be exposed, so that the water inlet 201 can be connected to the sewage outlet 102 through the flow port 7311. Of course, in other embodiments, the flow port 7311 can also be an area that axially penetrates the blocking portion 731 and is located on the periphery of the connecting portion 732.

[0138] Without loss of generality, the connecting portion 732 is axially movable, and the shielding portion 550 is separably blocked from the water inlet side 7301 of the flow port 7311 by changing the relative position of the water inlet side 7301 of the flow port 7311 and the shielding portion 550 in the axial direction. Of course, in other embodiments, the movable member 730 may also be rotatably arranged, and the shielding portion 550 is separably blocked from the water inlet side 7301 of the flow port 7311 by changing the relative position of the water inlet side 7301 of the flow port 7311 and the shielding portion 550 in the circumferential direction.

[0139] Without loss of generality, in the filtering mode, the shielding portion 550 abuts against the blocking portion 731, that is, the blocking portion 731 can detachably abut against the side of the shielding portion 550 close to the sewage outlet 102. Thus, through the abutment and cooperation between the shielding portion 550 and the blocking portion 731, a positioning effect can be provided for the movement of the movable part 730, thereby ensuring that the shielding portion 550 can reliably block the water inlet side 7301 of the flow outlet 7311.

[0140] Specifically, please participate Figure 3 , Figure 6 and Figure 8 , the shielding portion 550 is annular, and the water inlet side 7301 of the flow port 7311 is accommodated in the shielding portion 550 in the filtering mode, and at least partially exposed to the outside in the flushing mode. In this way, in the filtering mode, the water inlet side 7301 of the flow port 7311 and the shielding portion 550 are arranged opposite to each other, and can be accommodated in the inner circumference of the shielding portion 550. The shielding portion 550 blocks the water inlet side 7301 of the flow port 7311 by surrounding the connecting portion 732 where the water inlet side 7301 of the flow port 7311 is located. Furthermore, the flow port 7311 forms a plurality of penetration positions in the circumferential direction of the connecting portion 732, so that a plurality of water inlet sides 7301 are formed, and the annular shielding portion 550 can block the plurality of water inlet sides 7301 together. Of course, in other embodiments, the shielding portion 550 may be in an arc shape and disposed corresponding to the water inlet side 7301 of the flow opening 7311 .

[0141] In one embodiment, please refer to Figure 2 , Figure 4 , Figure 5 and Figure 7 , a sealing annular surface 711 is provided in the water filter chamber 101 corresponding to the sealing portion 731, and the outer periphery of the sealing portion 731 is sealed and matched with the sealing annular surface 711, and can move relative to the sealing annular surface 711 in the axial direction. That is, during the movement of the movable member 730, the outer periphery of the sealing portion 731 always maintains a state of sealing and matching with the sealing annular surface 711. In the filtering mode, it is beneficial to ensure the isolation of the space on both sides of the axial direction of the sealing portion 731, and avoid 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. In addition, the sealing annular surface 711 can provide a guiding effect for the movement of the sealing portion 731 to ensure that the sealing portion 731 switches smoothly between different positions. Of course, in other embodiments, the outer periphery of the sealing portion 731 can also be matched with the structural gap of the circumference.

[0142] Without loss of generality, please also refer to Figure 2 , Figure 4 , Figure 5 , Figure 7 , Fig.12 and Fig.13, the outer periphery of the blocking portion 731 is sleeved with a sealing member 734, and the inner periphery and outer periphery of the sealing member 734 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 734, and the sealing member 734 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.

[0143] In one embodiment, please refer to Figure 2 , Figure 4 , Figure 5 and Figure 7 , the pre-filter also includes a reversing bottom shell 710, the reversing bottom shell 710 is fixedly installed in the water filter chamber 101, and the blocking portion 731 extends into the inner side of the reversing bottom shell 710 and is slidably connected to the reversing bottom shell 710. It 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 movable part 730 and the shielding part 550 and the communication between the 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.

[0144] Without loss of generality, the inner circumference of the reversing bottom shell 710 is the 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 filter assembly 30 and the sealing annular surface 711 on the filter bottle 10 can be slidably sealed.

[0145] In one embodiment, please refer to Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 8The pre-filter further comprises an outer frame 50, which is sleeved outside the filter assembly 30, and the outer frame 50 comprises a side frame 512 and a bottom plate 511, wherein the bottom plate 511 is provided with a discharge port connected to the water inlet 201, and the movable member 730 comprises a blocking portion 731, wherein the discharge port and the sewage outlet 102 are respectively arranged on both axial sides of the blocking portion 731. It can be understood that the water filter chamber 101 is divided into two spaces by the bottom plate 511, the filter assembly 30 is installed on a side of the bottom plate 511 close to the water inlet 201, the side frame 512 is also located on this side, and the blocking portion 731 is located on a side of the bottom plate 511 close to the sewage outlet 102, and the spaces on both sides are connected through the discharge port on the bottom plate 511, and in the filtering mode, the water inlet 201 is connected to the sewage outlet 102 via the discharge port and the flow port 7311 in sequence.

[0146] In one embodiment, please refer to Figure 2 , Figure 4 , Figure 5 , Figures 7 to 9 The outer frame 50 is provided with an annular shielding portion 550, the water inlet side 7301 of the flow port 7311 is arranged corresponding to the inner circumference of the shielding portion 550, and the discharge port is arranged corresponding to the outer circumference of the shielding portion 550. Specifically, the discharge port 503 is located on the outer circumference of the shielding portion 550. In the filtering mode, the shielding portion 550 blocks the water inlet side 7301 of the flow port 7311 on its inner circumference, and the portion of the blocking portion 731 located on the outer circumference of the shielding portion 550 can separate the discharge port from the sewage outlet 102.

[0147] Specifically, the reversing bottom shell 710 is fixedly connected to a side of the bottom plate 511 close to the sewage outlet 102, and the discharge outlet is arranged corresponding to the inner circumference of the reversing bottom shell 710. Since the outer circumference of the blocking portion 731 and the inner circumference of the reversing bottom shell 710 are sealed and matched, and the discharge outlet is also located on the inner circumference of the reversing bottom shell 710, when the water inlet side 7301 of the flow port 7311 is blocked by the shielding portion 550, the flow path between the discharge outlet and the sewage outlet 102 is also cut off by the blocking portion 731, and when the water inlet side 7301 of the flow port 7311 is exposed outside the shielding portion 550, the discharge outlet can be connected to the sewage outlet 102 through the flow port 7311. Of course, in other embodiments, the blocking portion 731 may be provided with a convex portion corresponding to the discharge outlet, and the convex portion may be inserted into the discharge outlet to block the discharge outlet accordingly.

[0148] Furthermore, the exoskeleton 50 can be rotatably sleeved outside 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, and thus ensuring the filtering effect of the filter assembly 30. In this embodiment, the exoskeleton 50 includes a side frame 512 and a chassis 511, and the chassis 511 is connected to the side frame 512 and is located on a side away from the valve head 20, with strong structural stability and high rotation stability. Of course, in other embodiments, the exoskeleton 50 may also include only the side frame 512 structure.

[0149] In one embodiment, see Figure 8 The 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] In one embodiment, please refer to Figure 2 , Figure 4 , Figure 5 and Figure 7 , a siphon channel 501 is formed on the outer frame 50, a siphon hole 531 connected to the siphon channel 501 is provided on the side frame 512, and the discharge port 503 is provided on the bottom plate and connected to the siphon channel 501. In this way, in the flushing mode, 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 discharge port 503. That is, in the flushing mode, the impurities, particles, etc. intercepted by the filter assembly 30 can be more effectively and quickly guided to the sewage outlet 102, and finally discharged through the sewage outlet 102, thereby improving the flushing effect of the water filter chamber 101, especially the filter assembly 30. Specifically, the siphon channel 501 includes a connected side wall channel 501a and a bottom channel 501b, a plurality of siphon holes 531 are distributed at intervals along the extension direction of the side wall channel 501a, and the discharge port 503 is located at the end of the bottom channel 501b, that is, at one end away from the side wall channel 501a.

[0157] Without loss of generality, the spaces on both axial sides of the chassis 512 of the exoskeleton 50 are connected only through the discharge port 503, that is, in the sewage discharge mode, the water flow entering the water inlet 101 needs to pass through the siphon channel 501 to flow toward the sewage discharge port 102. The setting of the siphon channel 501 causes the water flow through the filter assembly 30 to eventually flow from the inside to the outside, thereby entraining the impurities fallen off the filter element 320 to be sucked into the siphon channel 501 through the siphon hole 531, and discharged from the discharge port 503 in the direction of the sewage discharge port 102, thereby achieving the purpose of cleaning the filter element 320.

[0158] In one embodiment, please refer to Figure 8 , Fig. 9 and Fig.18 , the inner circumference of the outer skeleton 50 is convexly provided with a plurality of cleaning brushes 90 distributed along the axial direction of the outer skeleton 50, one cleaning brush 90 is arranged corresponding to one filter element 320, and the cleaning brush 90 is arranged obliquely toward the filter element 320. In this embodiment, when the outer skeleton 50 rotates relative to the filter assembly 30, the impurities on the filter element 320 can be cleaned by the cleaning brush 90. Specifically, in the direction from the outside to the inside, the cleaning brush 90 is inclined toward the filter element 320 relative to the radial direction of the outer skeleton, so that the cleaning brush 90 can have more bristles facing the filter element 320, thereby enhancing the cleaning effect of the cleaning brush 90 on the filter element 320. It can be understood that the bristles at the end of the cleaning brush 90 should abut against the filter element 320, and stretch out, so as to cover the filter element 320, so as to ensure the cleaning effect of the cleaning brush 90 on the filter element 320.

[0159] Please refer to Fig.18 , corresponding to the matching relationship between two adjacent filters 320, the extension directions of the two adjacent cleaning brushes 90 in the axial direction of the outer frame 50 are opposite. In this way, the cleaning brush 90 can be arranged one-to-one with the filter 320 to ensure the cleaning effect of the cleaning brush 90 on the filter 320.

[0160] Furthermore, the cleaning brush 90 and the corresponding filter element 320 are set at an acute angle with the opening facing the outer periphery of the outer frame 50. In this way, the friction between the cleaning brush 90 and the filter element 320 can be reduced when the outer frame 50 rotates relative to the filter assembly 30, thereby ensuring that the cleaning brush 90 can clean the filter element 320 in the circumferential direction. Without loss of generality, the two adjacent cleaning brushes 90 are set at an acute angle, and correspondingly, the cone angle of the annular filter element 320 is set at an obtuse angle, so as to ensure the cleaning effect of the cleaning brush 90 while ensuring the filtering area of ​​the filter element 320.

[0161] Furthermore, 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, the movable member 730 is fixedly connected to the switching member 720. Thus, when the switching member 720 is driven to move axially, the movable member 730 can be driven to move axially synchronously, so that the blocking portion 731 moves accordingly. Of course, in other embodiments, the switching member 720 and the movable member 730 can also be connected by an intermediate structure. For example, the switching member 720 and the movable member 730 can be plugged in axially movable manner, and an elastic member is connected between the two to transmit the axial movement through the elastic member.

[0163] For more information, please see Figure 4 and Figure 7 , the switching member 720 is fixedly connected to the inner periphery of the filter assembly 30 through the hollow pipe section 723 and the connecting portion 732 of the movable member 730. Specifically, the connecting portion 732 extends into the filter assembly 30 and is connected to the hollow pipe section 723. Among them, the movable member 730 and the switching member 720 can be connected by threads, that is, one of the hollow pipe section 723 and the connecting portion 732 is provided with a screw hole, and the other is provided with an external thread, and the two are fixedly connected by screw connection. In this way, the movable member 730 and the switching member 720 are separately formed, and different materials can be selected for processing and forming to meet the requirements of switching and blocking respectively. Of course, in other embodiments, the switching member 720 and the blocking portion 731 can also be integrally formed.

[0164] Furthermore, 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 positions 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 reversing member will return to the position corresponding to the filtering mode, and the movable member 730 will return to the position separating the spaces on both sides. Thereafter, without being acted upon by external forces, the reversing member and the movable member 730 can stably stay in the current position to provide a stable working environment for the filtering process of the pre-filter.

[0165] In one embodiment, please refer to Figure 2 , Figure 3 , Figure 5 and Figure 6 , a first elastic member 1003 is provided between the switching member 720 and the filter assembly 30. Specifically, the first elastic member 1003 is provided between the switching member 720 and the filter assembly 30, so that one end of the first 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 first elastic member 1003. The other end of the first 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.

[0166] The first elastic member 1003 can be configured as a spring, so as to facilitate the installation of the first elastic member 1003 and reduce the interference of the first elastic member 1003 with the water flow inside the water filter chamber 101. In other embodiments, the first elastic member 1003 can also be configured as an elastic block or an elastic sleeve. In this case, the first elastic member 1003 is provided with an escape space for the water flow to pass through.

[0167] Furthermore, the first 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 first elastic member 1003 may affect the impact strength of the water flow, and therefore the first elastic member 1003 is arranged between the reversing member 720 and the water distributor 60.

[0168] Furthermore, one end of the first elastic member 1003 is located inside the annular main body 7221, which helps to ensure the stable installation of the first elastic member 1003, reduce the possibility of accidents of the first elastic member 1003, and further reduce the interference of the first elastic member 1003 on the water flow inside the water filter chamber 101. In other embodiments, the first elastic member 1003 can also be arranged on the outside of the annular main body 7221. In this case, one end of the first 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 expansion and contraction of the first elastic member 1003. At this time, there may be no direct connection between the first elastic member 1003 and the baffle skirt 7222, and one end of the first elastic member 1003 abuts against the side of the baffle skirt 7222 facing the water distributor 60.

[0169] In one embodiment, a first mounting ring groove is provided on the outer circumference of the first water-passing space, a second mounting ring groove is provided on the inner circumference of the annular main body, one end of the first elastic member is installed in the first mounting ring groove, and the other end is installed in the second mounting ring groove. In this way, the first elastic member can be stably installed, thereby ensuring the switching of the reversing member between different positions.

[0170] Specifically, the outer peripheral wall of the second mounting ring groove is also the annular main body, and the outer peripheral side of the annular main body can be slidably abutted against the outer peripheral side of the first mounting ring groove, so that the first mounting ring groove can also provide a guiding effect for the axial movement of the reversing main body, and one end of the first elastic member is adapted to be arranged outside the inner peripheral wall of the first mounting ring groove, and the other end is adapted to be arranged outside the inner peripheral wall of the second mounting ring groove to ensure the installation stability of the first elastic member. Without loss of generality, when the reversing member is in a position corresponding to the filtering mode, there is a spacing between the inner peripheral wall of the first mounting ring groove and the reversing member in the axial direction, and when the reversing member is switched to a position corresponding to the flushing mode, the reversing member abuts against the inner peripheral wall of the first mounting ring groove. In addition, the first water flow space is formed on the inner peripheral side of the inner peripheral wall of the first mounting ring groove.

[0171] In one embodiment, please refer to Figure 2 , Figure 4 , Figure 5 and Figure 7, a second elastic member is provided on a side of the movable member 730 close to the sewage outlet 102. In this way, the structure at the bottom of the filter bottle 10 can provide a mounting base for the second elastic member 1004, and it is not easy to interfere with other structures. Of course, in other embodiments, the second elastic member 1004 can also be provided on a side of the movable member 730 away from the sewage outlet 102.

[0172] Specifically, the second elastic member 1004 is disposed on a side of the blocking portion 731 close to the sewage outlet 102. It can be understood that the second elastic member 1004 is hollow, and the flow port 7311 and the sewage outlet 102 are arranged corresponding to the inner peripheral space of the second elastic member 1004. Even if the second elastic member 1004 is compressed to a clearance-free fit on the circumference, sewage can be discharged to the sewage outlet 102 through the inner peripheral space of the second elastic member 1004. Alternatively, the flow channel between the water outlet side of the flow port 7311 and the sewage outlet 102 is arranged to bypass the second elastic member 1004.

[0173] Further, in this embodiment, please refer to Figure 2 , Figure 4 , Figure 5 , Figure 7 , Fig.12 and Fig.13 , a mounting protrusion 7312 is convexly provided on one side of the blocking portion 731 close to the sewage outlet 102, and the second elastic member 1004 is sleeved on the mounting protrusion 7312. In this way, the second elastic member 1004 can be limited by the mounting protrusion 7312, so that the second elastic member 1004 is not easily displaced, so that it can be stably installed between the blocking portion 731 and the sewage outlet 102, thereby stably providing a restoring force to the movable member 730. Of course, in other embodiments, a groove can also be provided in the blocking portion 731 to accommodate the end of the second elastic member 1004, or the second elastic member 1004 can also be embedded in the blocking portion 731.

[0174] Without loss of generality, the mounting protrusion 7312 and the connecting portion 732 are coaxially arranged, and the outlet side 7302 of the flow port 7311 passes through the mounting protrusion 7312. In this way, the second elastic member 1004 can be centrally connected to the blocking portion 731, and the inner peripheral space of the second elastic member 1004 can be arranged relative to the outlet side 7302 of the flow port 7311 and the sewage outlet 102 without interfering with the connection between the outlet side 7302 of the flow port 7311 and the sewage outlet 102. Of course, in other embodiments, the flow port 7311 can pass through the side of the blocking portion 731, and a plurality of mounting protrusions 7312 can be arranged around the flow port 7311, and a second elastic member 1004 can be collectively sleeved outside the plurality of mounting protrusions 7312, or a plurality of second elastic members 1004 can be sleeved on the plurality of mounting protrusions 7312 in a one-to-one correspondence.

[0175] Without loss of generality, please also refer to Figure 2 , Figure 4 , Figure 5 and Figure 7 The housing includes a sewage discharge assembly 80, the sewage discharge port 102 is formed in the sewage discharge assembly 80, the sewage discharge assembly 80 includes a sewage discharge valve 820, the second elastic member 1004 is located between the movable member 730 and the sewage discharge valve 820, and the two ends of the second elastic member 1004 are respectively abutted against the movable member 730 and the sewage discharge assembly 80. In this way, the sewage discharge port 102 can be controlled to be on and off by the sewage discharge valve 820, and the second elastic member 1004 abuts against the sewage discharge assembly 80, so that the second elastic member 1004 can be relatively centrally arranged relative to the movable member 730, that is, it can be arranged relative to the fixed connection portion 732 and the hollow pipe section 723, which is conducive to the transmission between the movable member 730 and the reversing member 720. Of course, in other embodiments, it can also be that the end of the second elastic member 1004 away from the movable member 730 abuts against the filter bottle 10 or the reversing bottom shell 710.

[0176] Further, in this embodiment, please refer to Figure 2 , Figure 4 , Figure 5 and Figure 7 The sewage discharge assembly 80 includes a connecting member 810, the connecting member 810 is installed on the sewage discharge port 102, the sewage discharge valve 820 is connected to the connecting member 810, and the second elastic member 1004 abuts against the connecting member 810. Specifically, the reversing bottom shell 710 is located between the outer frame 50 and the sewage discharge port 102, and one axial side thereof is installed on the outer frame 50, and the other axial side abuts against the filter bottle 10 and is connected to the connecting member 810, and one end of the second elastic member 1004 abuts against the blocking portion 731, and the other end abuts against the connecting member 810. It can be understood that the connecting piece 810 will also be hollow, and the sewage will flow to the sewage valve 820 through the inner peripheral space of the connecting piece 810. The second elastic piece 1004 abuts against the connecting piece 810, so that the inner peripheral space of the second elastic piece 1004 and the inner peripheral space of the connecting piece 810 can be relatively and centrally arranged to ensure the smoothness of sewage discharge. At the same time, it is beneficial to reduce the size of the second elastic piece 1004, thereby saving the production cost of the pre-filter.

[0177] Without loss of generality, the second elastic member 1004 is configured as a compression spring. When the water inlet 201 and the water outlet 202 are opened, and the sewage outlet 102 is closed, that is, the pre-filter is in the filtering mode, the second elastic member 1004 can be in a natural state, that is, the second elastic member 1004 maintains its original length, and the second elastic member 1004 can also be in a compressed state to provide a certain pre-tightening force to the movable member 730 to ensure that the blocking part 731 reliably isolates the chambers on both sides; when the water outlet 202 is switched to a closed state and the sewage outlet 102 is switched to an open state, that is, when the pre-filter is switched to the flushing mode, the pressure difference on both sides of the blocking part 731 will indirectly act on the second elastic member 1004, causing the second elastic member 1004 to be compressed. In this way, when the pre-filter is switched to the filtering mode again, that is, after the pressure difference on both sides of the blocking part 731 disappears, the elastic force of the second elastic member 1004 will act on the blocking part 731, thereby driving the movable member 730 to return to its previous position. Of course, in other embodiments, the second elastic member 1004 may also be an elastic silicone sleeve or an elastic rubber sleeve.

[0178] It should be noted that the multiple indicated in this solution, unless otherwise specified, should be understood as greater than or equal to two.

[0179] 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.

[0180] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pre-filter, characterized in that: include: A valve head and a filter bottle, wherein the filter bottle is formed with a water filter cavity, the valve head is provided with a water inlet and a water outlet connected to the water filter cavity, and a sewage outlet connected to the water filter cavity is provided on a side of the filter bottle away from the valve head; A filter assembly and an outer frame are arranged in the water filter cavity, and the outer frame is rotatably sleeved outside the filter assembly; and A reversing member and a movable member connected in a transmission manner, wherein the reversing member can be movably inserted in the filter assembly so that the pre-filter can be switched between a filtering mode and a flushing mode; 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 water inlet, the water outlet and the filter assembly are arranged on one side of the movable member, and the sewage outlet is arranged on the other side of the movable member; In the filtering mode, the flushing flow path between the water inlet and the reversing member is cut off by the blocking portion, and the space on opposite sides of the movable member is separated; In the flushing mode, the flushing flow path between the water inlet and the reversing member is connected through the baffle, and the spaces on opposite sides of the movable member are connected; At least one of the switching member and the movable member is connected with an elastic member, and under the action of the elastic member, the switching member and the movable member can naturally maintain a position corresponding to the filtering mode.

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

3. The pre-filter according to claim 2, 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.

4. The pre-filter according to claim 1, characterized in that: The exoskeleton includes a side frame and a chassis, the chassis is connected to the side frame and is located away from the valve head, the exoskeleton forms a siphon channel, the side frame is provided with a siphon hole connected to the siphon channel, the chassis is provided with a discharge port connected to the siphon channel, and the discharge port is connected to the sewage outlet at least in the flushing mode.

5. The pre-filter according to claim 4, characterized in that: The chassis is provided with a shielding portion, the movable part includes a sealing portion and a connecting portion arranged on a side of the sealing portion away from the sewage outlet, the water inlet and the sewage outlet are arranged on both axial sides of the sealing portion, the movable part is provided with a flow port, the water outlet side of the flow port penetrates to a side of the sealing portion close to the sewage outlet, the water inlet side of the flow port extends axially to the connecting portion, and radially penetrates the radial side surface of the connecting portion, and in the filtering mode, the shielding portion blocks the water inlet side of the flow port.

6. The pre-filter according to claim 5, characterized in that: The connecting portion can be axially movable so that the shielding portion can be detachably blocked on the water inlet side of the flow opening.

7. The pre-filter according to claim 5, characterized in that: The shielding portion is annular, and the water inlet side of the flow port is accommodated in the shielding portion in the filtering mode, and is at least partially exposed to the outside in the flushing mode.

8. The pre-filter according to claim 5, characterized in that: The shielding portion is protrudingly disposed on one side of the bottom plate close to the sewage outlet. In the filtering mode, the discharge outlet and the water inlet side of the flow outlet are respectively located on two opposite sides of the shielding portion.

9. The pre-filter according to claim 5, characterized in that: A mounting protrusion is protrudingly provided on one side of the blocking portion close to the sewage outlet, and a second elastic member is sleeved on the mounting protrusion.

10. The pre-filter according to claim 9, characterized in that: The mounting protrusion and the connecting portion are coaxially arranged, and the water outlet side of the flow port passes through the mounting protrusion.

11. The pre-filter according to claim 5, characterized in that: A reversing bottom shell is connected to one side of the outer frame close to the sewage outlet, the blocking portion is located in the reversing bottom shell, and the connecting portion extends into the outer frame.

12. The pre-filter according to claim 11, characterized in that: The outer peripheral side of the blocking portion is sealingly fitted to the inner peripheral side of the reversing bottom shell.

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

14. The pre-filter according to claim 13, characterized in that: A plurality of cleaning brushes are convexly disposed on the inner circumference of the outer frame and distributed along the axial direction of the outer frame. One cleaning brush is disposed corresponding to one filter element, and the cleaning brush is disposed obliquely toward the filter element.

15. The pre-filter according to claim 14, characterized in that: The inner annular edges and the outer annular edges of two adjacent filter elements are distributed in opposite directions, and the extension directions of two adjacent cleaning brushes in the axial direction of the outer skeleton are opposite.

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

17. The pre-filter according to claim 16, characterized in that: The support frame includes an oblique support portion, and the two ends of the oblique support portion are respectively connected to a first ring portion and a second ring portion, the two oblique support portions of the same filter module are connected through the second ring portion, the first water outlet is provided on the inner periphery of the first ring portion, and the second water outlet is provided on the oblique support portion.

18. The pre-filter according to claim 17, characterized in that: Each of the supporting frames is provided with the second ring portion, the two second ring portions of the same filter module are detachably connected, and the first ring portions of two adjacent filter modules are detachably connected.

19. 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 communicated with the outer peripheral side of the water isolating ring, and the water outlet is communicated with the inner peripheral side of the water isolating ring; The filter assembly includes a water distributor and a filter module, wherein the water distributor is connected to a side of the filter module close to the water isolation ring; A water passage cavity is formed inside the filter module, a first water passage port communicating with the water passage cavity is provided in the axial direction of the filter module, a second water passage port communicating with the water passage cavity is provided in the circumferential direction of the filter module, and a filter element is provided in the second water passage port; The water distributor and the water isolation ring are arranged opposite to each other and spaced apart in the axial direction, the water distributor has a first water flow space arranged corresponding to the first water flow port and a second water flow space arranged corresponding to the second water flow port, and the second water flow space is provided with guide blades inclined relative to the circumferential direction; The connecting portion and the blocking portion are distributed along the axial direction, the connecting portion is plug-fitted with the water isolation ring, and the blocking portion is plug-fitted with the water distributor. In the filtering mode, the axial sides of the blocking portion are respectively connected to the water distributor and the water isolation ring, and are respectively connected to the first water flow space and the inner circumference of the water isolation ring, and are separated from the second water flow space. In the flushing mode, the connecting portion is at least partially located between the water distributor and the water isolation ring, and the blocking portion covers the second water flow space.

20. The pre-filter according to claim 19, characterized in that A first elastic member is provided between the reversing member and the water distributor.

21. The pre-filter according to claim 19, characterized in that: The switching member further includes a hollow pipe section, the connecting portion, the blocking portion and the hollow pipe section are sequentially distributed along the axial direction, and the hollow pipe section extends into the filter module.

22. The pre-filter according to claim 21, characterized in that The movable part comprises a blocking portion and a connecting portion arranged on a side of the blocking portion away from the sewage outlet, and the hollow pipe section is fixedly connected to the connecting portion.

23. The pre-filter according to claim 19, characterized in that: The barrier portion includes an annular main body portion extending axially along the reversing member, and a barrier skirt edge arranged around the outer periphery of the annular main body portion. The connecting portion and the annular main body portion are distributed along the axial direction. The annular main body portion and the water distributor can be movably plugged in and matched.

24. The pre-filter according to claim 23, characterized in that A first mounting ring groove is provided on the outer circumference of the first water flow space, a second mounting ring groove is provided on the inner circumference of the annular main body, and the elastic member includes a first elastic member, one end of the first elastic member is installed in the first mounting ring groove, and the other end is installed in the second mounting ring groove.

25. A water system, characterized in that: The pre-filter comprises the pre-filter according to any one of claims 1 to 24.

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