Reversing piece, pre-filter and water system

Abstract

The utility model discloses a reversing piece, prefilter and water consuming system relates to filter technical field, wherein the reversing piece includes switching section and hollow pipe section, switching section and hollow pipe section split molding and then mutually fixed connection, switching section includes communication portion and baffle portion, and the baffle portion is connected with the switching section and the hollow pipe section. The reversing part is arranged in the hollow pipe section and is arranged close to a water inlet of the pre-filter, a first communicating hole is formed in the peripheral wall of the hollow pipe section, and the reversing part is movably inserted into a filtering assembly of the pre-filter through the hollow pipe section, so that a filtering flow path between the water inlet and the first communicating hole can be communicated through the communicating part; and the partition part can be used for partition. According to the technical scheme, the reversing part is produced in a detachable mode, and the manufacturability of the reversing part is improved through split forming of the switching section and the hollow pipe section.

Description

Technical Field

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

[0002] As people's living standards continue to improve, the requirements for daily water use are also getting higher and higher. Due to long-term disrepair and aging of tap water pipes, there are a large number of large particles in the water that are harmful to the human body, such as mud, rust, and red worms, which seriously affect the health of residents' water use. Therefore, a pre-filter is set up, and a filter assembly and other structures are provided inside the pre-filter to filter large particles before the tap water is used. In the backwash pre-filter, a reversing member for switching the flow path is provided. However, in the related art, the manufacturability of the structure of the reversing member is low, which is not conducive to the production of the reversing member. Utility Model Content

[0003] The main purpose of the utility model is to propose a reversing member, a pre-filter and a water system, aiming to disassemble the reversing member for production, and improve the manufacturability of the reversing member by separately molding the switching section and the hollow pipe section.

[0004] To achieve the above-mentioned purpose, the reversing member proposed in the present invention is applied to the pre-filter, and the reversing member includes a switching section and a hollow pipe section. The switching section and the hollow pipe section are separately formed and fixedly connected. The switching section includes a connecting portion and a blocking portion, and is arranged near the water inlet of the pre-filter. The peripheral wall of the hollow pipe section is provided with a first connecting hole. The reversing member can be movably inserted into the filter assembly of the pre-filter through the hollow pipe section, so that the filtration flow path between the water inlet and the first connecting hole can be connected through the connecting portion, and can be blocked by the blocking portion.

[0005] In one embodiment, the switching section and the hollow tube section are detachably connected.

[0006] In one embodiment, the switching section and the hollow tube section are connected by buckling.

[0007] In one embodiment, a connecting buckle groove is provided on the inner circumference of the switching section, and a connecting buckle is provided on the end side of the hollow tube section, and the connecting buckle is buckled with the connecting buckle groove.

[0008] In one embodiment, a connecting ring portion is convexly provided on the inner circumference of the switching section, and the connecting buckle groove is formed in the connecting ring portion.

[0009] In one embodiment, a cantilever protruding along the axial direction is provided on the end side of the hollow tube section, and the connecting buckle is provided on the cantilever.

[0010] In one embodiment, a plurality of the connecting buckle grooves and the connecting buckles are correspondingly distributed along the circumferential direction.

[0011] In one embodiment, the reversing member further includes a water flow portion, which is integrally formed at the end of the hollow pipe segment. The diameter of the water flow portion is larger than the diameter of the hollow pipe segment. The hollow pipe segment is connected to the switching segment through the water flow portion.

[0012] The water passing portion is provided with a second communicating hole, so that the pre-filter can form a filtering flow path between the water inlet and the reversing member through the first communicating hole and the second communicating hole.

[0013] In one embodiment, the second communicating hole is blocked in the flushing mode of the pre-filter, and the water flow on the inner circumference of the hollow tube section can form a jet of water toward the filter assembly after flowing through the first communicating hole.

[0014] In one embodiment, an abutting slope is formed on the outer peripheral side of the water passing portion at a side of the second communicating hole close to the hollow pipe section, and the abutting slope extends obliquely toward the central axis of the reversing member in a direction close to the hollow pipe section.

[0015] In one embodiment, the width of the second communicating hole is greater than the width of the first communicating hole.

[0016] In one embodiment, a connecting buckle is provided on the end side of the water passing portion away from the hollow pipe section, and the water passing portion is buckled with the switching section through the connecting buckle.

[0017] In one embodiment, a cantilever is protruding from the end side of the water passing portion away from the hollow pipe section, and the connecting buckle is formed on the cantilever.

[0018] In one embodiment, a plurality of the cantilevers and the second communicating holes are distributed along the circumferential direction, and each of the second communicating holes is arranged corresponding to the interval between two adjacent cantilevers.

[0019] In one embodiment, a groove penetrating the end surface of the water-passing portion is provided on the end side away from the hollow pipe section, and the root of the cantilever is located in the groove.

[0020] In one embodiment, the connecting portion and the blocking portion are distributed along the axial direction, a connecting buckle groove is formed on a side of the blocking portion close to the connecting portion, and the connecting buckle is buckled in the connecting buckle groove.

[0021] In one embodiment, the barrier portion includes an annular main body extending axially and a barrier skirt arranged around the outer periphery of the annular main body, and the water passing portion is accommodated on the inner periphery of the annular main body and is spaced apart from the annular main body.

[0022] In one embodiment, the first communicating hole is configured as a strip-shaped hole extending in the axial direction.

[0023] In one embodiment, the width of the first communicating hole is 1 mm to 2 mm.

[0024] In one embodiment, the first communicating hole penetrates the peripheral wall of the hollow tube segment along a tangential direction of the inner peripheral surface of the hollow tube segment.

[0025] In one embodiment, the first communicating hole is arranged in an arc shape in the penetrating direction.

[0026] In one embodiment, a rounded corner is formed on the outer circumference of the hollow tube section corresponding to the arc-shaped inner circumference of the first communicating hole.

[0027] In one embodiment, the first communicating hole is gradually expanded in a penetrating direction from the inside to the outside.

[0028] In one embodiment, the hollow tube section is provided with a plurality of first communication holes spaced apart in the circumferential direction.

[0029] In one embodiment, a plurality of arc segments are formed on the inner circumference of the hollow tube section corresponding to the first communicating hole. The plurality of arc segments are sequentially tangentially connected in the water outlet direction of the corresponding first communicating hole, and the radius increases sequentially.

[0030] In one embodiment, the inner circumference of the hollow pipe section is formed with a first arc segment and a second arc segment corresponding to the first connecting hole. The first arc segment and the second arc segment are sequentially tangentially connected in the water outlet direction of the corresponding first connecting hole, and the radius increases sequentially. The central axis of the first arc segment is the central axis of the hollow pipe section.

[0031] In one embodiment, the radius of the first arc segment is 3 mm to 3.5 mm.

[0032] In one embodiment, the radius of the second arc segment is 5 mm to 7 mm.

[0033] The present invention also provides a pre-filter, which comprises:

[0034] A valve head and a filter bottle, wherein the filter bottle is formed with a water filter cavity, the valve head is provided with a water inlet and a water outlet connected to the water filter cavity, and the filter bottle is provided with a sewage outlet connected to the water filter cavity on a side away from the valve head;

[0035] A filter assembly is disposed in the water filter cavity; and

[0036] In the aforementioned reversing member, the hollow pipe section is movably inserted into the filter assembly from a side of the filter assembly close to the valve head.

[0037] The utility model also provides a water use system, which includes the aforementioned pre-filter.

[0038] In the technical solution of the present utility model, the switching section including the connecting part and the blocking part and the hollow tube section provided with the first connecting hole are formed separately, so that the switching part with a relatively complex structure can be split into two parts with a relatively simple structure. The two parts are molded separately, and the mold development difficulty is low. When the switching part is produced, the switching section and the hollow tube section are formed separately, which is convenient for demoulding, improves the manufacturability of the switching part, and is conducive to ensuring the product yield of the switching part. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0040] Figure 1 A schematic diagram of the assembly structure of a switching member according to an embodiment of the present invention;

[0041] Figure 2 for Figure 1 A schematic cross-sectional view of an embodiment of a switching member in FIG.

[0042] Figure 3 for Figure 1 Schematic diagram of the assembly structure of the reversing member from another perspective;

[0043] Figure 4 for Figure 1 A schematic diagram of the assembly structure of the reversing member from another perspective;

[0044] Figure 5 A schematic structural diagram of an embodiment of a switching section of a reversing member provided by the present invention;

[0045] Figure 6 for Figure 5 A structural diagram of the switching segment from another perspective;

[0046] Figure 7 This is a structural diagram of an embodiment of the hollow pipe section and water-passing portion of the reversing member provided by the utility model;

[0047] Figure 8 for Figure 7A schematic diagram of the structure of the hollow pipe section and the water-passing part from another perspective;

[0048] Figure 9 for Figure 7 A schematic diagram of the structure of the hollow pipe section and the water-passing part from another perspective;

[0049] Figure 10 for Figure 7 A schematic cross-sectional view of an embodiment of a hollow tube segment;

[0050] Figure 11 A schematic diagram of the assembly structure of a pre-filter according to an embodiment of the present invention;

[0051] Figure 12 This is a schematic cross-sectional view of an embodiment of the pre-filter provided by the present invention in filtering mode;

[0052] Figure 13 for Figure 12 A partial enlarged view of point A in the middle;

[0053] Figure 14 for Figure 13 A schematic diagram of the coordinated state of the local structure in an embodiment when the pre-filter is in flushing mode;

[0054] Figure 15 This is a structural schematic diagram of an embodiment of a filter assembly of a pre-filter provided by the utility model.

[0055] Description of Figure Numbers:

[0056] 10. Filter bottle; 101. Water filter chamber; 102. Sewage outlet;

[0057] 20. Valve head; 21. Metal shell; 22. Plastic lining; 201. Water inlet; 202. Water outlet; 1001. Fastener;

[0058] 30. Filter assembly; 300. Filter module;

[0059] 60. Water distributor; 610. First water flow space; 620. Second water flow space; 604. Blocking portion;

[0060] 720, reversing member; 7200, switching section; 7201, connecting buckle groove; 721, connecting portion; 722, blocking portion; 7221, annular main body; 7222, blocking skirt;

[0061] 7223, connecting ring; 7224, water flow portion; 7225, second communication hole; 7226, connecting buckle; 7227, cantilever; 7228, abutting inclined surface; 7229, groove;

[0062] 723, hollow tube section; 7231, first connecting hole; 7232, rounded corner; 7233, first arc segment; 7234, second arc segment.

[0063] 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

[0064] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0065] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0066] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0067] Water systems, such as whole-house water purification systems, typically feature a pre-filter to remove large particles from tap water. This not only ensures water safety but also extends the life of appliances, prevents clogged household water pipes, and improves residents' health. The pre-filter is the first coarse filtration device in a whole-house water purification system and is a physical filtration device used to protect back-end water safety.

[0068] The pre-filter has a filtering mode and a flushing mode. In the filtering mode, the pre-filter can filter large particles before the water end. In the flushing mode, the pre-filter can clean its internal filter components 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.

[0069] See also Figure 11 and Figure 12 The pre-filter includes a valve head 20 and a filter bottle 10, wherein 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.

[0070] The water inlet 201 is connected to the water supply end of the water supply system, and the water outlet 202 is connected to the water consumption end of the water supply system, thereby filtering the raw water flowing from the water supply end to the water consumption end. It should be noted that the water supply end can be a tap, water tower, or well water, and the water consumption end can be a faucet, shower, or drinking water outlet, which is not specifically limited in this application.

[0071] The connection between the valve head 20 and the filter bottle 10 can be a threaded connection. For example, the valve head 20 may be provided with an externally threaded tube, and the mouth of the filter bottle 10 may be provided with an internal thread for threading the externally threaded tube. To reduce the production difficulty of the prefilter and the inspection requirements for the assembly results, as well as to reduce the material cost of the valve head 20, in this embodiment, the filter bottle 10 and the valve head 20 are connected by a fastener 1001. The fastener 1001 may be a bolt, wherein the bolt and the through hole threadably engage to lock the filter bottle 10 and the valve head 20. The fastener 1001 may also be a bolt and nut assembly, wherein the bolt passes through the through hole and is locked with the nut. The fastener 1001 may also be a pin and a pin shaft assembly, wherein the pin passes through the through hole and the pin shaft passes through the pin, thereby locking the filter bottle 10 and the valve head 20.

[0072] The valve head 20 includes a metal outer shell 21 and a plastic lining 22, both of which are connected. The water inlet 201 and the water outlet 202 are formed in the plastic lining 22. The metal outer shell 21 of the valve head 20 and the filter bottle 10 are connected by fasteners 1001. In this way, the water flowing through the pre-filter directly contacts the plastic lining 22 rather than the metal outer shell 21. This can prevent the water from being contaminated by metal elements precipitated from the metal outer shell 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.

[0073] 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).

[0074] The pre-filter also includes a filter assembly 30 disposed within the water filter chamber 101. After raw water (e.g., tap water or well water) flows from an external water source into the water inlet 201, it can flow through the filter assembly 30 for filtration. The filter assembly 30 is provided with a filter structure on its periphery, which can intercept large particles of impurities in the water and remove some precipitated impurities, rust, sand, mud, bacteria, and other particulate impurities generated in the pipeline. This provides better protection for water purifiers, washing machines, showers, high-end faucets, downstream pipelines, etc., reducing the risk of damage to these devices due to impurity blockage. The form and structure of the filter structure are not limited. The filter structure can be configured with a stainless steel filter mesh or a PP cotton filter mesh to filter impurities.

[0075] The pre-filter is usually a "T"-shaped structure. The upper "horizontal" position corresponds to the valve head 20, and the left and right ends are the water inlet 201 and the water outlet 202 respectively. The lower "vertical" main body is the filter bottle 10, and the sewage outlet 102 is located on the lower side of the filter bottle 10.

[0076] The pre-filter includes two types: forward flushing and back flushing. The back flushing pre-filter is provided with a reversing member 720. The reversing member 720 switches the internal flow path, so that the pre-filter can form a filtering flow path in the filtering mode and a flushing flow path different from the filtering flow path in the flushing mode. In the filtering flow path, the water flows from the outer periphery of the filter component 30 to the inner periphery of the filter component 30 to intercept impurities on the outer periphery of the filter component 30. Impurities will be attached to the outer peripheral surface of the filter component 30, especially at the position of the filter structure. As for the flushing flow path, the water flows from the inner periphery of the filter component 30 to the outside. Under the impact of the water flow, impurities attached to the filter structure can be more easily removed, thereby achieving the purpose of flushing the filter component 30.

[0077] In the related art, the switching member needs to be molded with a related structure so that the internal flow path of the pre-filter can switch between the flushing flow path and the filtration flow path. However, this makes the structure of the switching member complex and the manufacturability poor. The switching member is generally configured as a plastic part and is molded by an injection molding process, and an injection mold needs to be developed for it. Due to the complex structure of the switching member, the structure of the mold is also complex, resulting in great difficulty in mold development and high development costs. In addition, when producing the switching member, it is easy to encounter problems such as difficulty in demolding and low product yield.

[0078] The present utility model provides a reversing member 720 .

[0079] See also Figures 1 to 9 In one embodiment of the present invention, the reversing member 720 includes a switching section 7200 and a hollow pipe section 723. The switching section 7200 and the hollow pipe section 723 are separately formed and fixedly connected. The switching section 7200 includes a connecting portion 721 and a blocking portion 722, and is arranged near the water inlet 201 of the pre-filter. The peripheral wall of the hollow pipe section 723 is provided with a first connecting hole 7231. The reversing member 720 is movably inserted into the filter assembly 30 of the pre-filter through the hollow pipe section 723, so that the filtration flow path between the water inlet 201 and the first connecting hole 7231 can be connected through the connecting portion 721, and can be blocked by the blocking portion 722.

[0080] Among them, the reversing member 720 moves relative to the filter assembly 30, so that the connecting part 721 and the blocking part 722 move to different positions, thereby switching the internal flow path of the pre-filter between the flushing flow path and the filtration flow path, and the hollow pipe section 723 of the reversing member 720 is inserted into the interior of the filter assembly 30.

[0081] When the pre-filter is in filtering mode, the water inlet 201 and water outlet 202 are open, the sewage outlet 102 is closed, and the blocking portion 722 is positioned to block the flushing flow path between the water inlet 201 and the reversing member 720, thereby forming a filtering flow path. In the filtering flow path, water from the water inlet 201 will first flow into the water filter chamber 101, then flow from the outer periphery of the filter assembly 30 to the inner periphery of the filter assembly 30, thereby intercepting impurities through the filter assembly 30. Thereafter, the water can flow through the first connecting hole 7231 into the inner periphery of the reversing member 720. The water flow on the inner periphery of the reversing member 720 can finally flow through the water outlet 202 to the water end.

[0082] When the pre-filter is in flushing mode, the water inlet 201 and the sewage outlet 102 are open, and the water outlet 202 is closed. On the side of the filter assembly 30 near the water inlet 201, the barrier portion 722 is positioned to separate the water filter chamber 101 from the water inlet 201 on the outer periphery of the filter assembly 30. The water inlet 201 can be connected to the inner periphery of the reversing member 720 through the connecting portion 721, thereby isolating the filtration flow path and forming a flushing flow path. In the flushing flow path, water from the water inlet 201 will flow through the connecting portion 721 to the inner periphery of the reversing member 720. Then, water on the inner periphery of the reversing member 720 can flush the filter assembly 30 through the first connecting hole 7231. The water will finally flow from the inner periphery of the filter assembly 30 into the water filter chamber 101 on the outer periphery of the filter assembly 30, and finally exit the pre-filter through the sewage outlet 102.

[0083] In the technical solution of the present utility model, the switching section 7200 including the connecting portion 721 and the blocking portion 722 and the hollow tube section 723 provided with the first connecting hole 7231 are formed separately, so that the switching member 720 with a relatively complex structure can be split into two parts with relatively simple structures. The two parts are molded separately, and the mold development difficulty is low. When the switching member 720 is produced, the switching section 7200 and the hollow tube section 723 are formed separately, which is convenient for demoulding, improves the manufacturability of the switching member 720, and is conducive to ensuring the product yield of the switching member 720.

[0084] In one embodiment, the switching segment 7200 and the hollow tube segment 723 are detachably connected. This detachable connection allows the switching segment 7200 and the hollow tube segment 723 to be replaced independently while maintaining a stable connection. If one of the two segments is damaged, the two can be disassembled and only the damaged segment can be replaced, and then both can be fixed together, which helps reduce maintenance costs for the switching member 720. Of course, in other embodiments, the switching segment 7200 and the hollow tube segment 723 can also be fixed together using a non-detachable method, such as welding or bonding.

[0085] The switching section 7200 and the hollow tube section 723 can be detachably connected by threaded connection, screw locking, buckling or clamping.

[0086] In this embodiment, please refer to Figures 2 to 4 The switching segment 7200 and the hollow tube segment 723 are detachably connected via a snap-fit ​​mechanism. Specifically, one of the switching segment 7200 and the hollow tube segment 723 is provided with a snap, and the other is provided with a snap groove. The snap and groove engage to secure the switching segment 7200 and the hollow tube segment 723. The snap-fit ​​connection between the switching segment 7200 and the hollow tube segment 723 facilitates assembly and disassembly, improving the production and assembly efficiency of the switching segment 7200 and the hollow tube segment 723, as well as facilitating maintenance and replacement.

[0087] Without loss of generality, see Figures 2 to 9The inner circumference of the switching section 7200 is provided with a connecting buckle groove 7201, and the end of the hollow tube section 723 is provided with a connecting buckle 7226, which engages with the connecting buckle groove 7201. Thus, by extending the connecting buckle 7226 provided on the end of the hollow tube section 723 into the inner circumference of the switching section 7200, so that the connecting buckle 7226 and the connecting buckle groove 7201 are aligned and engaged with the connecting buckle groove 7201, the switching section 7200 and the hollow tube section 723 are fixed. Furthermore, the connection between the two will be located on the inner circumference of the switching section 7200, and the switching section 7200 can protect the connection to ensure the stability of the connection. Of course, in other embodiments, a connecting buckle groove 7201 may be provided on the inner circumference of the switching section 7200 , or a connecting buckle 7226 may be provided on the switching section 7200 , and a connecting buckle groove 7201 may be provided on the end side of the hollow tube section 723 .

[0088] Further, see Figure 4 and Figure 6 The inner circumference of the switching section 7200 is provided with a protruding connecting ring portion 7223, and the connecting buckle groove 7201 is formed in the connecting ring portion 7223. Thus, the connecting buckle groove 7201 can be exposed on the inner circumference of the switching section 7200, facilitating the alignment of the connecting buckle 7226. The connecting buckle 7226 can pass over the connecting ring portion 7223 via the connecting buckle groove 7201, moving from one axial side of the connecting ring portion 7223 to the other axial side of the connecting ring portion 7223. It is restrained by the connecting ring portion 7223, preventing the hollow tube section 723 from escaping. Of course, in other embodiments, the inner circumferential wall of the switching section 7200 may also be provided with a recessed connecting buckle groove 7201.

[0089] Further, see Figures 7 to 9 The end of the hollow tube section 723 is provided with an axially protruding cantilever 7227, and the connecting buckle 7226 is provided on the cantilever 7227. As a result, because the cantilever 7227 is easily deformable, the connecting buckle 7226 can be more easily engaged with the connecting buckle groove 7201. After the connecting buckle 7226 and the connecting buckle groove 7201 are engaged, the cantilever 7227 has a tendency to recover its deformation, and the connecting buckle 7226 can react on the connecting buckle groove 7201, thereby making the engagement between the connecting buckle 7226 and the connecting buckle groove 7201 tighter, thereby ensuring the connection stability between the switching section 7200 and the hollow tube section 723. Of course, in other embodiments, the deformability of the connecting buckle 7226 can also be enhanced by opening a hole near the location where the connecting buckle 7226 is provided.

[0090] Furthermore, the connecting buckle grooves 7201 and the connecting clips 7226 are distributed circumferentially in a corresponding manner. Thus, the engagement of the multiple connecting clips 7226 with the connecting buckle grooves 7201 can further enhance the connection stability between the switching section 7200 and the hollow tube section 723. It is understood that multiple cantilevers 7227 are also provided, with the connecting clips 7226 located on the side of the cantilever 7227 facing away from the central axis of the hollow tube section 723. Thus, when the two components are assembled, the multiple cantilevers 7227 will converge inward. After the multiple connecting clips 7226 and the connecting buckle grooves 7201 engage, the multiple cantilevers 7227 can exert a force from the center toward the circumference on the inner circumference of the switching section 7200, forming a state similar to an interference fit, making it difficult for the switching section 7200 and the hollow tube section 723 to separate, thereby further ensuring the stability of the connection between the switching section 7200 and the hollow tube section 723.

[0091] In one embodiment, see Figures 2 to 4 and Figures 7 to 9 The reversing member 720 further includes a water passing portion 7224, which is integrally formed at the end of the hollow pipe section 723. The diameter of the water passing portion 7224 is larger than the diameter of the hollow pipe section 723. The hollow pipe section 723 is connected to the switching section 7200 through the water passing portion 7224. The water passing portion 7224 is provided with a second connecting hole 7225, so that the pre-filter can form a filtering flow path between the water inlet 201 and the reversing member 720 through the first connecting hole 7231 and the second connecting hole 7225. The larger diameter of the water passage 7224 facilitates the formation of related structures for connection to the switching section 7200. The smaller diameter of the hollow tube section 723 allows for easier insertion into the inner circumference of the filter assembly 30, and the inner circumferential space of the filter assembly 30 can also be appropriately reduced. Consequently, the filtering surface of the filter assembly 30 can be configured to be inclined, fully utilizing the space within the water filter chamber 101 while providing sufficient filtering area. This facilitates miniaturization of the pre-filter while ensuring sufficient filtration throughput for the filter assembly 30. Furthermore, the second connecting hole 7225 provided in the water passage 7224 enhances the water flow capacity of the diverter 720. When the pre-filter is in filtering mode, water flowing into the inner circumference of the filter assembly 30 can also flow through the second connecting hole 7225 provided in the water passage 7224 into the inner circumference of the diverter 720, thereby enhancing the filtering capacity and flow rate of the pre-filter.

[0092] Specifically, the water passage 7224 is provided with the aforementioned cantilever 7227 protruding from the end side away from the hollow tube section 723. The cantilever 7227 is formed with a connecting clip 7226. The connecting clip 7226 is fastened to the switching section 7200, which not only facilitates the assembly of the two components of the reversing member 720 but also ensures the stability of the connection between the two components. In addition, the two components of the reversing member 720 are detachably connected. If either component is damaged, it can be removed and replaced separately, reducing the maintenance cost of the reversing member 720. Of course, in other embodiments, the water passage 7224 can also be connected through non-detachable methods such as welding and bonding, or can be screwed together through threaded connection, screw locking, or clipping.

[0093] Furthermore, a plurality of the cantilevers 7227 and the second connecting holes 7225 are circumferentially distributed, with each second connecting hole 7225 corresponding to the spacing between two adjacent cantilevers 7227. That is, the cantilevers 7227 are not axially opposed to the second connecting holes 7225, but are staggered. This helps ensure the structural strength of the connection between the cantilevers 7227 and the end surface of the water passage 7224, thereby ensuring the connection reliability between the two components of the reversing member 720. Of course, in other embodiments, the cantilevers 7227 can also be positioned relative to the second connecting holes 7225 while ensuring the structural strength of the connection between the cantilevers 7227 and the end surface of the water passage 7224.

[0094] Further, see Figure 7 and Figure 8 The end of the water-passing portion 7224 away from the hollow tube section 723 is provided with a groove 7229 extending through the end surface, and the root of the cantilever 7227 is located within the groove 7229. This further strengthens the connection stability between the cantilever 7227 and the end surface of the water-passing portion 7224, making the cantilever 7227 less likely to break. Furthermore, the groove 7229 provided at the connection between the cantilever 7227 and the end surface of the water-passing portion 7224 ensures that the thickness at the connection between the cantilever 7227 and the end surface of the water-passing portion 7224 is relatively uniform with the thickness at other locations, thereby preventing the cantilever 7227 from breaking due to uneven shrinkage during injection molding. Of course, in other embodiments, a reinforcing rib structure may also be provided at the connection between the cantilever 7227 and the end surface of the water-passing portion 7224.

[0095] In one embodiment, the second communicating hole 7225 is blocked in the pre-filter's flushing mode, and water flowing from the inner circumference of the hollow tube section 723, after flowing through the first communicating hole 7231, can form a jet of water toward the filter assembly 30. Thus, in the pre-filter's flushing mode, the second communicating hole 7225 is blocked, and water from the inner circumference of the reversing member 720 can only flow outward through the first communicating hole 7231. In this embodiment, the structure of the first communicating hole 7231 is designed so that the water flowing through it forms a jet, thereby generating a greater impact force on the filter assembly 30, thereby effectively flushing the filter assembly 30.

[0096] In one embodiment, see Figures 7 to 9 The width of the second connecting hole 7225 is greater than the width of the first connecting hole 7231. The smaller width of the first connecting hole 7231 is more conducive to forming an outward water jet, while the larger width of the second connecting hole 7225 is conducive to increasing the water flow capacity of the reversing member 720 in the filtering mode. Of course, in other embodiments, the width of the second connecting hole 7225 can also be smaller than the width of the first connecting hole 7231. In this case, by increasing the distribution density of the second connecting holes 7225, the water flow capacity of the reversing member 720 in the filtering mode can also be greatly increased.

[0097] In one embodiment, see Figure 8 and Figure 9 An abutting slope 7228 is formed on the outer circumference of the water-passing portion 7224, on a side of the second communicating hole 7225 near the hollow tube section 723. The abutting slope 7228 extends obliquely toward the central axis of the reversing member 720 in a direction approaching the hollow tube section 723. The abutting slope 7228 is configured to abut against related structures on the end side of the filter assembly 30 to block the second communicating hole 7225. When the pre-filter is in filtering mode, a gap exists between the abutting bevel 7228 and the corresponding structure, allowing water flowing from the inner circumference of the filter assembly 30 to flow toward the second communicating hole 7225 through the gap. The abutting bevel 7228 also serves to guide the water flow. When the pre-filter is in flushing mode, the abutting bevel 7228 abuts against the corresponding structure, blocking the passage from the inner circumference of the reversing member 720 to the inner circumference of the filter assembly 30 through the second communicating hole 7225. Consequently, water flowing from the inner circumference of the reversing member 720 can only flow out through the first communicating hole 7231. Of course, in other embodiments, a corresponding structure can be inserted into the second communicating hole 7225 to block it.

[0098] In one embodiment, see Figures 1 to 5The connecting portion 721 and the blocking portion 722 are arranged axially. The blocking portion 722 includes an axially extending annular main portion 7221 and a blocking skirt 7222 disposed around the outer periphery of the annular main portion 7221. The water-passing portion 7224 is accommodated on the inner periphery of the annular main portion 7221 and is spaced apart from the annular main portion 7221. In this manner, the reversing member 720 can be axially moved relative to the filter assembly 30 to switch between a position corresponding to a filtration mode and a position corresponding to a flushing mode, thereby opening or blocking the corresponding flow path. Specifically, on the side of the filter assembly 30 near the water inlet 201, the annular main body 7221 and the barrier skirt 7222 can be used to block different locations in different modes to disconnect the corresponding passages. For example, in the filtering mode of the pre-filter, the annular main body 7221 can block the connection between the water inlet 201 and the inner circumference of the reversing member 720, while in the flushing mode of the pre-filter, the barrier skirt 7222 can block the connection between the water inlet 201 and the water filter chamber 101. Of course, in other embodiments, corresponding to other connection modes of the relevant structure, the barrier portion 722 can also be adjusted to other shapes.

[0099] Without loss of generality, see Figures 12 to 15 The filter assembly 30 includes a connected filter module 300 and a water distributor 60. A filter structure is provided on the outer peripheral side of the filter module 300. The water distributor 60 is located at one end of the filter assembly 30 close to the water inlet 201. The water distributor 60 is formed with a first water flow space 610 and a second water flow space 620 arranged outside the first water flow space 610. The first water flow space 610 is arranged corresponding to the inner peripheral side of the filter module 300, and the second water flow space 620 is arranged corresponding to the outer peripheral side of the filter module 300. The hollow pipe section 723 of the reversing member 720 is inserted into the inner periphery of the filter module 300 through the first water flow space 610. The axial side of the connecting portion 721 away from the blocking portion 722 can be axially movably connected to the valve head 20, so that the inner peripheral side of the reversing member 720 can be connected to the water outlet 202. The first water flow space 610 is further formed with a protruding blocking portion 604 . The blocking portion 604 is spaced apart from the abutting inclined surface 7228 in the filtering mode, and abuts against the abutting inclined surface 7228 in the flushing mode.

[0100] See also Figure 13 In the filtering mode of the pre-filter, the connecting portion 721 is retracted into the valve head 20, and the blocking portion 722 is arranged corresponding to the interval between the valve head 20 and the water distributor 60. The axial sides of the annular main body 7221 are respectively connected to the valve head 20 and the inner circumferential wall of the first water flow space 610, and the blocking skirt 7222 is spaced apart from the inner circumferential wall of the filter bottle 10. The water flow from the water inlet 201 will flow into the water filter chamber 101 through the interval and the second water flow space 620 in sequence, thereby forming the aforementioned filtration flow path.

[0101] See also Figure 14 In the pre-filter flushing mode, the barrier skirt 7222 seals the second water flow space 620, the annular main body 7221 retracts into the first water flow space 610, and the connecting portion 721 is at least partially located between the valve head 20 and the water distributor 60. Water from the water inlet 201 flows through the connecting portion 721 into the inner circumference of the reversing member 720, thereby forming the aforementioned flushing flow path. The connecting portion 721 is configured as a porous structure, with a filter structure corresponding to the holes to filter the flowing water and prevent impurities from entering the inner circumference of the filter assembly 30. The filter structure is often configured as a filter screen, which is fixed to the inside or outside of the connecting portion 721, or integrally formed with the connecting portion 721.

[0102] In one embodiment, see Figure 2 The connecting buckle groove 7201 is formed on the side of the baffle 722 close to the connecting portion 721. Specifically, the connecting buckle 7226 is engaged with the connecting buckle groove 7201 at the connection between the annular main body 7221 and the connecting portion 721. If the water flow portion 7224 is connected to the connecting portion 721, in the filtering mode, when the water flows into the reversing member 720, it needs to pass through the second connecting hole 7225 to flow through the connecting portion 721, which will bring too much resistance. Therefore, it is better to form the connecting buckle groove 7201 on the baffle 722. In addition, the closer the connecting buckle groove 7201 is arranged to the connecting portion 721, the more the water flow portion 7224 can be accommodated on the inner circumference of the baffle 722, which is conducive to the corresponding structures of the reversing member 720 and the water distributor 60 to cooperate. Specifically, the water flow portion 7224 is accommodated on the inner circumference of the annular main body 7221 and is spaced apart from the annular main body 7221. In this way, the reversing member 720 and the water distributor 60 need to be connected through an elastic member, and the elastic member can be installed at the gap. When the reversing member 720 is in a position corresponding to the flushing mode, under the action of the elastic member, the reversing member 720 can have a tendency to reset to a position corresponding to the filtering mode.

[0103] In one embodiment, see Figures 7 to 9 The first connecting hole 7231 is configured as a strip-shaped hole extending axially. This allows the width of the first connecting hole 7231 to be designed to be relatively small, allowing water from the inner periphery of the hollow tube section 723 to be ejected through the first connecting hole 7231. Furthermore, since the first connecting hole 7231 extends axially, it helps ensure that the first connecting hole 7231 covers the filter structure on the filter module 300, thereby ensuring a flushing effect on the filter module 300. Furthermore, it helps form a uniform axially distributed water jet flow, so that the filter structure is subjected to a uniform axial impact force, thereby ensuring the structural stability of the filter assembly 30. Of course, in other embodiments, multiple first connecting holes 7231 may be provided, spaced apart along the axial direction.

[0104] Specifically, the width D of the first connecting hole 7231 is between 1 mm and 2 mm. That is, the width D of the first connecting hole 7231 is greater than or equal to 1 mm and less than or equal to 2 mm. This ensures that a water flow of appropriate strength is stably ejected from the first connecting hole 7231, allowing the filter module 300 to be subjected to an appropriate impact force. This ensures a flushing effect on the filter module 300 while also helping to maintain the structural stability of the filter module 300. Of course, in other embodiments, the width of the first connecting hole 7231 may be less than 1 mm or greater than 2 mm, provided that an appropriate water flow is generated.

[0105] Further, see Figure 10 Multiple first communication holes 7231 are distributed circumferentially. This ensures that the jetted water flow covers the filter structure circumferentially, thereby ensuring a flushing effect on the filter module 300. Furthermore, this facilitates forming a uniform circumferential jetted water flow, so that the filter structure is subjected to a uniform impact force in the axial direction, thereby ensuring the structural stability of the filter assembly 30.

[0106] In one embodiment, see Figure 10 The first communication hole 7231 penetrates the circumferential wall of the hollow tube section 723 along a tangential direction of the inner circumferential surface of the hollow tube section 723. In this way, the water flow can be guided by the inner circumferential surface of the hollow tube section 723 to reduce resistance to the water flow and form a swirling flow, thereby more fully flushing the filter module 300. Of course, in other embodiments, the first communication hole 7231 can also penetrate the circumferential wall of the hollow tube section 723 in a radial direction.

[0107] In one embodiment, see Figure 10 The first communication hole 7231 is gradually expanded in the direction of penetration from the inside to the outside. This can increase the outlet pressure of the water flow, thereby improving the flushing effect of the water flow on the filter module 300. Of course, in other embodiments, the first communication hole 7231 can also be gradually contracted and expanded in the direction of penetration from the inside to the outside, which is conducive to increasing the flow rate of the water flow.

[0108] In one embodiment, see Figure 10 The first communicating hole 7231 is arranged in an arc shape in the penetrating direction. In this way, the swirl effect can be further enhanced, thereby further improving the flushing effect of the filter module 300. Of course, in other embodiments, the first communicating hole 7231 can also be arranged straight in the penetrating direction.

[0109] Specifically, see Figure 10The outer circumference of the hollow tube section 723 is formed with a rounded corner 7232 on the arc-shaped inner circumference corresponding to the first communication hole 7231. This prevents the formation of a sharp structure here that affects the effect of the swirl flow. At the same time, the guiding effect of the rounded corner 7232 can further enhance the effect of the swirl flow, thereby ensuring the flushing effect of the filter module 300.

[0110] In one embodiment, the inner circumference of the hollow tube section 723 is formed with multiple arc segments corresponding to the first connecting hole 7231. These arc segments are sequentially connected tangentially in the direction of water outlet from the corresponding first connecting hole 7231, and their radii increase sequentially. That is, the curvature of the arc segments gradually decreases in the direction of water outlet from the corresponding first connecting hole 7231. This allows the water flow to be gradually guided toward the first connecting hole 7231 through the multiple arc segments, transforming the water flow from the first connecting hole 7231 into a vortex flow. This helps maintain a certain centrifugal force, making the water flow from the first connecting hole 7231 more dispersed, thereby ensuring comprehensive flushing of the filter module 300. Furthermore, the tangent connection between the two connected arc segments can prevent localized losses that could affect the formation of a vortex flow. Furthermore, when multiple first communicating holes 7231 are provided circumferentially around the hollow tube section 723, among the multiple arc segments corresponding to two adjacent communicating holes, the arc segment with the greatest curvature corresponding to one first communicating hole 7231 will be positioned adjacent to the arc segment with the smallest curvature corresponding to the other first communicating hole 7231, and both will be located near the preceding first communicating hole 7231. However, the curvature difference between the two arc segments is significant, and water flow will not be directed to the arc segment corresponding to the succeeding first communicating hole 7231, but will flow smoothly out through the preceding first communicating hole 7231. In other embodiments, a gradually curvatured arc segment may be formed for each first communicating hole 7231, i.e., the curvature of the arc segment gradually decreases as it approaches the corresponding first communicating hole 7231.

[0111] Further, see Figure 10The inner circumference of the hollow tube section 723 is formed with a first arc segment 7233 and a second arc segment 7234, corresponding to each first connecting hole 7231. The first arc segment 7233 and the second arc segment 7234 are tangentially connected in sequence in the direction of water outflow from the corresponding first connecting hole 7231, and their radii increase successively. The central axis of the first arc segment 7233 is the central axis of the hollow tube section 723. In other words, the curvature of the second arc segment 7234 is less than that of the first arc segment 7233, and the second arc segment 7234 is flatter than the first arc segment 7233. In this way, the first arc segment 7233 and the second arc segment 7234 form two distinct arc segments, ensuring the formation of a swirling flow. The first arc segment 7233 serves as the starting point for the swirling flow, and its central axis is the central axis of the hollow tube section 723, which can better guide the water flow. Of course, in other embodiments, other numbers of arc segments, such as three or four, can be formed corresponding to each first connecting hole 7231.

[0112] The radius of the first arc segment 7233 is preferably between 3 mm and 3.5 mm, and the radius of the second arc segment 7234 is preferably between 5 mm and 7 mm. That is, the radius of the first arc segment 7233 is greater than or equal to 3 mm and less than or equal to 3.5 mm, and the radius of the second arc segment 7234 is greater than or equal to 5 mm and less than or equal to 7 mm. In this way, the first arc segment 7233 and the second arc segment 7234 can have appropriate curvatures to form a good guiding effect on the water flow, thereby ensuring the formation of a vortex of sufficient intensity. Of course, in other embodiments, the radius of the first arc segment 7233 can also be less than 3 mm or greater than 3.5 mm, and the radius of the second arc segment 7234 can also be less than 5 mm or greater than 7 mm.

[0113] It should be noted that the multiple indicated in this solution should be understood as greater than or equal to two unless otherwise specified.

[0114] The present invention also proposes a pre-filter, which includes a reversing member. The specific structure of the reversing member refers to the above-mentioned embodiment. Since the pre-filter adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0115] The present invention also provides a water system including the aforementioned pre-filter, thereby also providing at least all of the benefits of the technical solutions of the aforementioned embodiments, which will not be detailed here. The water system includes at least the components from the pre-filter to the water supply terminal. For example, the water system may include household appliances such as a water heater, a dishwasher, and a water dispenser, as well as accessories such as water pipes for household water supply.

[0116] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A reversing element, applied to a pre-filter, characterized in that: The switching member includes a switching section and a hollow pipe section, and the switching section and the hollow pipe section are fixedly connected after being separately formed. The switching section includes a connecting portion and a blocking portion, and is arranged near the water inlet of the pre-filter. The peripheral wall of the hollow pipe section is provided with a first connecting hole. The switching member can be movably inserted into the filter assembly of the pre-filter through the hollow pipe section, so that the filtering flow path between the water inlet and the first connecting hole can be connected through the connecting portion, and can be blocked by the blocking portion.

2. The reversing element according to claim 1, wherein: The switching section and the hollow tube section are detachably connected.

3. The reversing member according to claim 1, wherein: The switching section and the hollow tube section are connected by buckling.

4. The reversing member according to claim 1, wherein: A connecting buckle groove is provided on the inner circumference side of the switching section, and a connecting buckle is provided on the end side of the hollow tube section, and the connecting buckle is buckled with the connecting buckle groove.

5. The reversing element according to claim 4, wherein: A connecting ring portion is convexly provided on the inner circumference of the switching section, and the connecting buckle groove is formed in the connecting ring portion; And / or, the end side of the hollow tube section is provided with a cantilever protruding along the axial direction, and the connecting buckle is provided on the cantilever.

6. The reversing element according to claim 4, wherein: There are a plurality of connecting buckle grooves and connecting buckles correspondingly distributed along the circumferential direction.

7. The reversing element according to claim 1, wherein: The reversing member further includes a water flow portion, which is integrally formed at the end of the hollow pipe section. The diameter of the water flow portion is larger than the diameter of the hollow pipe section. The hollow pipe section is connected to the switching section through the water flow portion. The water passing portion is provided with a second communicating hole, so that the pre-filter can form a filtering flow path between the water inlet and the reversing member through the first communicating hole and the second communicating hole.

8. The reversing element according to claim 7, wherein: The second communicating hole is blocked in the flushing mode of the pre-filter, and the water flow on the inner peripheral side of the hollow pipe section can form a jet of water toward the filter assembly after flowing through the first communicating hole.

9. The reversing element according to claim 8, wherein: An abutting slope is formed on the outer peripheral side of the water passing portion at a side of the second communicating hole close to the hollow pipe section. The abutting slope extends obliquely toward the central axis of the reversing member in a direction close to the hollow pipe section.

10. The reversing element according to claim 7, wherein: The width of the second communicating hole is greater than that of the first communicating hole.

11. The reversing element according to claim 7, wherein: A connecting buckle is provided on the end side of the water passing portion away from the hollow pipe section, and the water passing portion is buckled with the switching section through the connecting buckle.

12. The reversing element according to claim 11, wherein: A cantilever is protruding from the end side of the water passing portion away from the hollow pipe section, and the connecting buckle is formed on the cantilever.

13. The reversing element according to claim 12, wherein: There are a plurality of the cantilevers and the second communicating holes distributed along the circumferential direction, and each of the second communicating holes is arranged corresponding to the interval between two adjacent cantilevers.

14. The reversing element according to claim 12, wherein: The end side of the water-passing portion away from the hollow pipe section is provided with a groove penetrating the end surface, and the root of the cantilever is located in the groove.

15. The reversing element according to claim 11, wherein: The communicating portion and the blocking portion are distributed along the axial direction. A connecting buckle groove is formed on one side of the blocking portion close to the communicating portion, and the connecting buckle is buckled in the connecting buckle groove.

16. The reversing element according to claim 15, wherein: The barrier portion includes an annular main body extending in the axial direction and a barrier skirt arranged around the outer periphery of the annular main body. The water passing portion is accommodated on the inner periphery of the annular main body and is spaced apart from the annular main body.

17. The reversing element according to claim 1, wherein: The first communicating hole is configured as a strip-shaped hole extending in the axial direction.

18. The reversing element according to claim 17, wherein: The width of the first communicating hole is 1 mm to 2 mm.

19. The reversing element according to claim 1, wherein: The first communicating hole penetrates the peripheral wall of the hollow tube section along a tangential direction of the inner peripheral surface of the hollow tube section.

20. The reversing element according to claim 1, wherein: The first communicating hole is arranged in an arc shape in the penetrating direction.

21. The reversing element according to claim 20, wherein: A rounded corner is formed on the outer circumference of the hollow tube section corresponding to the arc-shaped inner circumference of the first communicating hole.

22. The reversing element according to claim 1, wherein: The first communicating hole is gradually expanded in a penetrating direction from the inside to the outside.

23. The reversing element according to claim 1, wherein: The hollow tube section is provided with a plurality of first communication holes spaced apart in the circumferential direction.

24. The reversing element according to claim 1, wherein: The inner circumference of the hollow pipe section is formed with a plurality of arc segments corresponding to the first communicating hole. The plurality of arc segments are sequentially tangently connected in the water outlet direction of the corresponding first communicating hole, and the radius increases sequentially.

25. The reversing element according to claim 1, wherein: The inner circumference of the hollow pipe section is formed with a first arc segment and a second arc segment corresponding to the first connecting hole. The first arc segment and the second arc segment are tangentially connected in sequence in the water outlet direction of the corresponding first connecting hole, and the radius increases successively. The central axis of the first arc segment is the central axis of the hollow pipe section.

26. The reversing element according to claim 25, wherein: The radius of the first arc segment is 3 mm to 3.5 mm; And / or, the radius of the second arc segment is 5 mm to 7 mm.

27. A pre-filter, characterized in that: include: A valve head and a filter bottle, wherein the filter bottle is formed with a water filter cavity, the valve head is provided with a water inlet and a water outlet connected to the water filter cavity, and the filter bottle is provided with a sewage outlet connected to the water filter cavity on a side away from the valve head; A filter assembly is arranged in the water filter cavity; as well as The reversing member according to any one of claims 1 to 26, wherein the hollow pipe section is movably inserted into the filter assembly from a side of the filter assembly close to the valve head.

28. A water system, characterized in that: Includes the pre-filter according to claim 27.

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