Pre-filter and water system

Abstract

The utility model discloses a prefilter and water consuming system relates to filter technical field, wherein prefilter includes valve head, filter flask and filter subassembly, valve head is equipped with the waterproof ring between water inlet and water outlet, the filter subassembly includes the water distributor and a plurality of filter module that connect in proper order, water distributor is located close to valve head side, the filter flask is located close to valve head side, and the filter module is located close to valve head side. The filtering module is provided with a first water passing opening and a second water passing opening, the second water passing opening is provided with a filter which is at least partially inclined, the water distributor forms a first water passing space and a second water passing space, the second water passing space is annularly arranged outside the first water passing space, and the two axial sides of the first water passing space are communicated with the first water passing opening and the inner circumferential side of the waterproof ring respectively; the two axial sides of the second water passing space communicate with the peripheral side of the waterproof ring and the second water passing opening correspondingly, and guide vanes inclined relative to the axial direction are arranged. According to the technical scheme provided by the utility model, the filtering effect of the filtering assembly is ensured, and the service life of the pre-filter is prolonged.

Description

Technical Field

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

[0002] As people's living standards continue to improve, their demands for daily water use are also increasing. Due to long-term disrepair and aging of tap water pipes, a large amount of large particles harmful to the human body, such as mud, rust, and red worms, are present in the water, seriously affecting the health of residents. Therefore, a pre-filter is provided, which is equipped with a filter assembly and other structures inside the pre-filter to filter out large particles before the tap water is used. However, while the pre-filter is filtering the water, impurities will adhere to the water filter cavity, especially the surface of the filter assembly. Over time, this will clog the filter assembly and reduce the filtering effect of the filter assembly. Utility Model Content

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

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

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

[0006] A filter assembly is provided in the water filter cavity and is located between the water inlet and the sewage outlet. The filter assembly includes a water distributor and a plurality of filter modules connected in sequence. The water distributor is located on a side close to the valve head.

[0007] A water passage cavity is formed inside the filter module, a first water passage is provided in the axial direction of the filter module and is connected to the water passage cavity, a second water passage is provided in the circumferential direction of the filter module and is connected to the water passage cavity, the filter module includes a filter element provided at the second water passage, and the filter element is at least partially inclined;

[0008] The water distributor is formed with a first water flow space and a second water flow space. The second water flow space is arranged outside the first water flow space. The axial sides of the first water flow space are respectively connected to the first water flow port and the inner circumference of the water isolation ring. The axial sides of the second water flow space are respectively connected to the outer circumference of the water isolation ring and the second water flow port, and are provided with guide blades inclined relative to the axial direction.

[0009] In one embodiment, the water distributor and the water isolation ring are formed separately and are sealed and connected.

[0010] In one embodiment, the water distributor includes an annular convex portion protruding away from the filter module, the first water flow space is formed on the inner circumference of the annular convex portion, and the annular convex portion is plugged into the water isolation ring.

[0011] In one embodiment, the annular protrusion is inserted into the water-isolating ring, and a sealing ring is provided on the outer shell of the annular protrusion, and abuts against the inner peripheral wall of the water-isolating ring through the sealing ring.

[0012] In one embodiment, the water distributor also includes a first connecting ring and a second connecting ring, the second connecting ring is arranged outside the first connecting ring, the second water flow space is formed between the first connecting ring and the second connecting ring, the annular protrusion is protruded from the first connecting ring, and is connected to the first connecting ring in a step-like shape, and the first connecting ring abuts against the end face of the water-isolating ring.

[0013] In one embodiment, the water distributor is fixedly connected to the filter bottle.

[0014] In one embodiment, the outer periphery of the water distributor is snap-connected to the inner peripheral wall of the filter bottle.

[0015] In one embodiment, the water distributor also includes a first connecting ring and a second connecting ring, the second connecting ring is arranged outside the first connecting ring, the second water flow space is formed between the first connecting ring and the second connecting ring, and a fixing protrusion is convexly provided on the outer peripheral side of the second connecting ring, and a mounting groove is correspondingly provided on the inner peripheral wall of the filter bottle, and the fixing protrusion is clamped in the mounting groove.

[0016] In one embodiment, the water distributor and the filter module are fixedly connected.

[0017] In one embodiment, a first connecting structure and a second connecting structure are respectively provided on both axial sides of the filter module, and the first connecting structure of one filter module is used to be detachably connected to the second connecting structure of another filter module to fix the two filter modules, and at least one of the first connecting structure and the second connecting structure can be detachably connected to the water distributor.

[0018] In one embodiment, one of the first connection structure and the second connection structure is configured as a latching protrusion, and the other is configured as a latching groove, and the water distributor is correspondingly configured with a latching protrusion or a latching groove.

[0019] In one embodiment, one of the first connection structure and the second connection structure is configured as a hook, and the other is configured as a hook groove, and the water distributor is correspondingly provided with a hook or a hook groove.

[0020] In one embodiment, the filter module includes two support frames distributed along the axial direction, the water passage cavity is formed between the two support frames, and each of the support frames is provided with the second water passage port.

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

[0022] In one embodiment, each of the support frames is provided with the second ring portion, the two second ring portions of the same filter module are detachably connected, and the first ring portions of two adjacent filter modules are detachably connected.

[0023] In one embodiment, the pre-filter also includes an exoskeleton, which is rotatably mounted on the outside of the filter assembly. The exoskeleton is provided with a cleaning structure, which includes an inner cleaning brush protruding from the inner circumference of the exoskeleton. The inner cleaning brush includes a cleaning portion, which extends in the axial direction of the exoskeleton. The cleaning portion is arranged corresponding to the filter element, and the cleaning portion is used to clean the filter element.

[0024] In one embodiment, the cleaning portion extends along the circumferential direction of the exoskeleton at an angle relative to the axial direction of the exoskeleton.

[0025] In one embodiment, the cleaning portion is configured as a sheet-like structure.

[0026] In one embodiment, the side portion of the cleaning portion distributed in the axial direction of the outer skeleton is inclined.

[0027] In one embodiment, a plurality of cleaning portions are distributed in the axial direction of the outer frame, one cleaning portion is provided corresponding to one filter element, and an acute angle is formed between two adjacent cleaning portions.

[0028] In one embodiment, the inner cleaning brush further comprises a base portion, the base portion is protruding from the inner circumference of the outer frame, and the cleaning portion is connected to the outer circumference of the base portion.

[0029] In one embodiment, the valve head and the filter bottle are connected by fasteners.

[0030] In one embodiment, a first flange is protruded from the outer periphery of the filter bottle, and a second flange is protruded from the outer periphery of the valve head. The first flange and the second flange are in contact with each other and are connected by fasteners.

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

[0032] In the technical solution of the present invention, the filtering area of ​​the filter element can be increased at the same axial height, which means that at the same flow rate, the filter element of this solution can withstand a larger flow load and improve the filtering efficiency. Moreover, since the filtering area of ​​the filter element of this solution is large enough, even if a local area of ​​the filter element is clogged, the remaining area of ​​the filter element can continue to withstand a larger flow load, which helps to extend the service life of the filter module, reduce the replacement frequency, and thus reduce maintenance costs.

[0033] In the filtering mode, the water inlet and the water outlet are opened, and the sewage outlet is closed. The water entering the water inlet flows through the first water flow space into the water filter chamber, and then flows from the outer periphery of the filter component through the second water flow port of the filter component into the inner periphery of the filter component, thereby being filtered by the filter element, and impurities are intercepted by the filter element. The filtered water will flow through the second water flow space to the inner peripheral side of the water isolation ring, and finally flow to the water outlet.

[0034] In the flushing mode, the water inlet and the sewage outlet are opened, and the water outlet is closed. The water entering the water inlet still enters the water filter chamber through the first water flow space. After the water flow flushes the surface of the filter element, the sewage will be discharged through the sewage outlet, thereby discharging the impurities previously intercepted, which can reduce the adhesion of impurities on the filter element, thereby ensuring the filtering effect of the filter component and improving the service life of the pre-filter.

[0035] Among them, the guide blades arranged in the first water flow space enable the water flow entering the water filter chamber to form a vortex, so as to disturb the water flow and avoid the deposition of impurities. Especially in the flushing mode, the impurities can be better entrained in the water flow, thereby facilitating the discharge of impurities from the sewage outlet along with the water flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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.

[0037] Figure 1 A schematic diagram of the external structure of an embodiment of a pre-filter provided by the utility model;

[0038] Figure 2 This is a structural diagram of an embodiment of a valve head of a pre-filter provided by the present invention;

[0039] Figure 3 A schematic cross-sectional view of an embodiment of a pre-filter provided by the present invention;

[0040] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0041] Figure 5 A schematic structural diagram of an embodiment of a filter assembly of a pre-filter provided by the present invention;

[0042] Figure 6 for Figure 5 Schematic diagram of the exploded structure of an embodiment of the filtering module in FIG.

[0043] Figure 7 for Figure 5 A schematic diagram of the connection structure of two filter modules in an embodiment;

[0044] Figure 8 for Figure 5 A schematic diagram of the connection structure of the two filter modules in another embodiment;

[0045] Figure 9 This is a structural diagram of an embodiment of the exoskeleton of the pre-filter provided by the present invention;

[0046] Figure 10 for Figure 9 A schematic cross-sectional view of an embodiment of an exoskeleton;

[0047] Figure 11 A schematic diagram of the coordination state of the cleaning structure of the pre-filter and the filter assembly according to one embodiment of the present invention;

[0048] Figure 12 A schematic structural diagram of an embodiment of a cleaning structure of a pre-filter provided by the present invention from a first perspective;

[0049] Figure 13 for Figure 12 Schematic diagram of the clean structure from other perspectives;

[0050] Figure 14 This is a schematic diagram of the assembly structure of the cleaning structure and outer frame of the pre-filter provided by the utility model.

[0051] Description of Figure Numbers:

[0052] 10. Filter bottle; 101. Water filter chamber; 102. Sewage outlet; 110. First flange;

[0053] 20. Valve head; 21. Metal shell; 22. Plastic lining; 201. Water inlet; 202. Water outlet; 210. Water isolation ring; 220. Second flange;

[0054] 30. Filter assembly; 300. Filter module; 301. First connection structure; 302. Second connection structure;

[0055] 310, support frame; 311, oblique support portion; 312, first ring portion; 313, second ring portion; 320, filter element; 330, first water outlet; 340, water passage cavity; 350, second water outlet;

[0056] 50, exoskeleton; 511, chassis; 512, side frame;

[0057] 60. Water distributor; 601. First water flow space; 602. Second water flow space; 603. Guide vane; 604. Fixed protrusion; 610. Annular protrusion; 620. First connecting ring; 630. Second connecting ring;

[0058] 90. Cleaning structure; 910. Internal cleaning brush; 911. Cleaning unit; 912. Base unit; 930. Mounting unit;

[0059] 1001. Fastener; 1002. Sealing ring.

[0060] 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

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] The utility model proposes a pre-filter, which has a filtering mode and a flushing mode. In the filtering mode, the pre-filter can filter large particulate matter before the water end. In the flushing mode, the pre-filter can clean the filter components inside it to discharge the large particulate matter previously intercepted, thereby eliminating the need for manual disassembly and cleaning of the pre-filter, thereby increasing the service life of the pre-filter.

[0066] See also Figures 1 to 3 In one embodiment of the present invention, the pre-filter includes a valve head 20 and a filter bottle 10, the filter bottle 10 is formed with a water filter chamber 101, the valve head 20 is provided with a water inlet 201 and a water outlet 202 connected to the water filter chamber 101, and the filter bottle 10 is provided with a sewage outlet 102 on the side away from the valve head 20.

[0067] 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.

[0068] The valve head 20 and the filter bottle 10 can be connected by a threaded connection. For example, the valve head 20 may be provided with an externally threaded tube, and the mouth of the filter bottle 10 may be provided with corresponding internal threads for threading the externally threaded tube. To reduce the difficulty of pre-filter production and the requirements for assembly test results, as well as to reduce the material cost of the valve head 20, in this embodiment, the filter bottle 10 and the valve head 20 are connected by a fastener 1001.

[0069] Specifically, if Figure 1 As shown, a first flange 110 is protruding from the outer periphery of the filter bottle 10, and a second flange 220 is protruding from the outer periphery of the valve head 20. The first flange 110 and the second flange 220 abut against each other and are connected by a fastener 1001. It is understood that both the first flange 110 and the second flange 220 are provided with through-holes for the fastener 1001 to pass through. The fastener 1001 can be a bolt, which, through the threaded engagement between the bolt and the through-hole, achieves locking of the first flange 110 and the second flange 220. The fastener 1001 can also be a bolt and nut assembly, where the bolt passes through the through-hole and is locked to the nut. The fastener 1001 can also be a pin and a pin assembly, where the pin passes through the through-hole and the pin is passed through the pin, achieving locking of the first flange 110 and the second flange 220.

[0070] like Figure 3 As shown, the valve head 20 comprises a connected metal outer shell 21 and a plastic inner lining 22, with the water inlet 201 and the water outlet 202 both formed in the plastic inner lining 22. The second flange 220 is formed on the metal outer shell 21. This ensures that water flowing through the pre-filter directly contacts the plastic inner lining 22, rather than the metal outer shell 21. This prevents water contamination by metal elements precipitated from the metal outer shell 21, while also enhancing the pre-filter's aesthetics and housing strength. In other embodiments, the valve head 20 can also be configured directly as a metal component.

[0071] The material of the metal shell part 21 and the plastic lining part 22 is not specifically limited in this application. For example, the material of the metal shell part 21 can be a copper alloy such as brass, and the material of the plastic lining part 22 can be PP (polypropylene) or PVC (polyvinyl chloride).

[0072] The pre-filter also includes a filter assembly 30 disposed within the water filter chamber 101. After raw water (e.g., tap water or well water) flows from an external water source into the water inlet 201, it can flow through the filter assembly 30 for filtration. The filter assembly 30 can intercept large particles of impurities in the water and remove some precipitated impurities, rust, sand, mud, bacteria, and other particulate impurities generated in the pipeline. This provides better protection for water purifiers, washing machines, showers, high-end faucets, downstream pipelines, etc., reducing the risk of damage to these devices due to impurity blockage. The form and structure of the filter assembly 30 are not limited. The filter assembly 30 can be equipped with a stainless steel filter mesh or a PP cotton filter mesh to filter impurities.

[0073] 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.

[0074] In one embodiment, please refer to Figures 5 to 8 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 330 connected to the water cavity 340 is provided in the axial direction of the filter module 300, and a second water passage 350 connected to the water cavity 340 is provided in the circumferential direction of the filter module 300. The filter module 300 includes a filter element 320 arranged at the second water passage 350, and the filter element 320 is at least partially inclined. It can be understood that in the filtering mode, the raw water will enter the water flow chamber 340 through the second water flow outlet 350 on the peripheral side of the filter module 300, so that the impurities in the raw water can be filtered by the filter element 320, and finally the clean water flows from the first water flow outlet 330 on the axial side of the filter module 300 to the water outlet 202. Since the filter element 320 is at least partially inclined, the filtering area of ​​the filter element 320 can be increased at the same axial height, which means that at the same flow rate, the filter element 320 of this solution can withstand a larger flow load and improve the filtering efficiency. Moreover, since the filtering area of ​​the filter element 320 of this solution is large enough, even if a local area of ​​the filter element 320 is blocked, the remaining area of ​​the filter element 320 can continue to withstand a larger flow load, which helps to extend the service life of the filter module 300, reduce the replacement frequency, and thus reduce maintenance costs.

[0075] Without loss of generality, Figure 6 As shown, the filter element 320 is annular and has an inner ring edge and an outer ring edge, with the outer ring edge located axially to one side of the inner ring edge. 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. This can further increase the filtration area of ​​the filter element 320, further improve the flow load that the filter element 320 can withstand, and improve the filtration efficiency.

[0076] Furthermore, the outer side surface of the filter element 320 is configured as a conical surface. The conical surface design facilitates uniform distribution and smooth flow of the fluid, reduces eddy currents and turbulence within the filter module 300, and reduces energy loss. Specifically, the generatrix of the conical surface can be a straight line, or the generatrix of the conical surface can be a concave arc that is concave toward the inside of the water chamber 340, or the generatrix of the conical surface can be a convex arc that is convex toward the outside of the water chamber 340. In other embodiments, the outer side surface of the filter element 320 can also be a pyramidal surface with a polygonal cross-section, thereby increasing the filtration area of ​​the filter element 320.

[0077] In one embodiment, the filter assembly 30 includes a plurality of filter modules 300. The provision of multiple filter modules 300 enhances the modularity of the filter assembly 30. The number of filter modules 300 can be flexibly adjusted according to the model of the pre-filter (for example, but not limited to, the size of the filter bottle 10), thereby achieving the effect of adjusting the size of the filter assembly 30, thereby solving the problem of sharing the filter assembly 30 of pre-filters of different models. Since the filtration area of ​​each filter module 300 is fixed, adjusting the number of filter modules 300 can also achieve the effect of adjusting the total filtration area of ​​the filter assembly 30, thereby enabling the setting of an appropriate filtration area, thereby achieving the effect of improving the filtration effect.

[0078] It can be understood that in the filtration flow path of the pre-filter, the second water inlet 350, the water passage cavity 340, and the first water inlet 330 are sequentially arranged along the upstream and downstream sides. That is, when the pre-filter is in filtration mode, water entering from the water inlet 201 will flow sequentially through the second water inlet 350, the water passage cavity 340, and the first water inlet 330 to the water outlet 202. However, when the pre-filter is in flushing mode, since the pre-filter is a positive flushing type, the flow direction of the water does not change for the filtration module. However, due to the closure of the water outlet 202 and the opening of the sewage outlet 102, water entering from the water inlet 201, after passing through the second water inlet 350 and entering the water passage cavity 340, will not flow through the first water inlet 330 to the water outlet 202, but will ultimately flow through the second water inlet 350 to the sewage outlet 102.

[0079] In one embodiment, if Figure 14 As shown, the filter assembly 30 further includes a water distributor 60 , which is axially connected to the filter module 300 . Specifically, when multiple filter modules 300 are provided, the water distributor 60 is connected to a filter module 300 that is closer to the valve head 20 .

[0080] In one embodiment, if Figure 7 and Figure 8As shown, a first connecting structure 301 and a second connecting structure 302 are respectively provided on both axial sides of the filter module 300. The first connecting structure 301 of one filter module 300 is used to detachably connect with the second connecting structure 302 of the other filter module 300 to fix the two filter modules 300 together. At least one of the first connecting structure 301 and the second connecting structure 302 can be detachably connected to the water distributor 60. In other words, the structure for detachably connecting the two filter modules 300 is also used for detachably connecting with the water distributor 60. In this way, the modularity of the filter assembly 30 can be improved, and the assembly of the various structures of the filter assembly 30 can be facilitated.

[0081] Among them, it can be, such as Figure 8 As shown, one of the first connection structure 301 and the second connection structure 302 is set as a card convex, and the other is set as a card slot. The water distributor 60 is correspondingly provided with a card convex or a card slot. Of course, it can also be, as shown in FIG. Figure 7 As shown, one of the first connection structure 301 and the second connection structure 302 is configured as a hook, and the other is configured as a hook groove, and the water distributor 60 is correspondingly configured with a hook or a hook groove.

[0082] Specifically, the filter module 300 may be provided with a latching protrusion on the side close to the water distributor 60 and a latching groove on the side away from the water distributor 60, and the water distributor 60 may be provided with a latching groove on the side close to the filter module 300. In this way, the water distributor 60 and the filter module 300 as well as the two adjacent filter modules 300 can be detachably connected through the cooperation of the latching protrusion and the latching groove, and the same applies to the cooperation of the hook groove and the latching hook.

[0083] In one embodiment, if Figure 6 As shown, the filter module 300 includes two axially distributed support frames 310, with a water passage chamber 340 formed between the two support frames 310. Each support frame 310 is equipped with a filter element 320, and the inner and outer edges of adjacent filter elements 320 are arranged in opposite directions. It can be understood that, given a constant radial space within the water filter chamber 101, compared to a filter module 300 that maintains a tapered shape in one direction, having two filter elements 320 of the same filter module 300 tapered in opposite directions can achieve a larger filtration area. In this way, this embodiment fully utilizes the space within the water filter chamber 101, creating a larger filtration area around the filter module 300 to ensure that the filter assembly 30 can withstand a larger flow load and improve filtration efficiency. At the same time, a sufficiently large water passage chamber 340 can be formed within the two support frames 310 to facilitate water flow. Of course, in other embodiments, a filter module 300 may also include only one support frame 310 , and the first water outlet 330 , the second water outlet 350 and the water passage cavity 340 are formed on the same support frame 310 .

[0084] In one embodiment, if Figure 6 As shown, the support frame 310 includes an oblique support portion 311, with a first ring portion 312 and a second ring portion 313 connected to each end of the oblique support portion 311. The two oblique support portions 311 of the same filter module 300 are connected by the second ring portion 313. The first water outlet 330 is provided on the inner periphery of the first ring portion 312, and the second water outlet 350 is provided on the oblique support portion 311. This ensures the structural strength of the support frame 310 and the connection strength between the two support frames 310, thereby ensuring the filtration capacity of the filter assembly 30. Of course, in other embodiments, the support frame 310 can also be configured as other structural forms.

[0085] Specifically, if Figure 6 As shown, the inclined support portion 311 includes a plurality of ribs spaced apart along the circumferential direction to form a plurality of second water outlets 350 spaced apart along the circumferential direction. The filter element 320 is stacked on the inclined support portion 311. In this way, the inclined support portion 311 can provide sufficient support for the filter element 320, and the total flow area of ​​the second water outlet 350 is large, so that the filter module 300 has sufficient flow capacity.

[0086] Without loss of generality, the outer diameter of the second ring portion 313 is larger than the outer diameter of the first ring portion 312. Thus, each filter element 320 alternately tapers in the upper and lower directions, making fuller use of the space within the water filter cavity 101 to provide a larger filtration area, thereby further improving the filtration efficiency of the filter assembly 30. Of course, in other embodiments, the outer diameter of the first ring portion 312 may be larger than the outer diameter of the second ring portion 313, or there may be no fixed size relationship between the diameters of the first ring portion 312 and the second ring portion 313.

[0087] In one embodiment, if Figure 6As shown, each support frame 310 is provided with a second ring portion 313, and the two second ring portions 313 of the same filter module 300 are detachably connected. It will be appreciated that the detachable connection allows for easy separation of components without damaging the connector itself or adjacent components. This feature allows for quick and efficient repair or replacement of the support frame 310 of the filter module 300, reducing maintenance effort and costs. The ease of detachable connection significantly saves time when maintaining or replacing the support frame 310 of the filter module 300. Furthermore, the detachable connection allows for quick replacement of faulty support frames 310, thereby reducing water system outage time and improving maintenance efficiency. Furthermore, compared to non-detachable connections, detachable connections reduce the likelihood of entire components being scrapped due to inability to disassemble, thus reducing resource waste. Furthermore, the detachable connection allows for regular or irregular inspection and maintenance of the filter assembly 300 to ensure its stability and safety, helping to promptly identify and address potential safety hazards.

[0088] Furthermore, in some possible connection methods, the two second ring portions 313 are snap-fitted. It is understood that when the second ring portions 313 are made of plastic or metal, the snap-fit ​​structure can be molded directly onto the second ring portions 313, eliminating the need for additional fastening components such as screws or nuts during assembly, thereby reducing manufacturing and assembly costs. Furthermore, due to the flexible design of the snap-fit ​​structure, it can be customized to the actual needs of the second ring portion 313, reducing material waste and improving material utilization. Furthermore, the snap-fit ​​connection allows for rapid assembly and disassembly without the need for complex tools and equipment. This significantly improves production and assembly efficiency, while also facilitating maintenance and replacement of the filter module 300. Specifically, the snap-fit ​​structure can be a combination of a hook and a groove, or a protrusion and a groove. Of course, in other embodiments, the two second ring portions 313 can also be threadedly connected. The tight engagement of the threads provides the connection between the two second ring portions 313 with high tensile and compressive strength, meeting the requirements of various operating conditions. After assembly, the connection is less likely to loosen, maintaining a stable connection and ensuring the proper operation of the filter module 300.

[0089] 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 frames 310 are connected by the two second ring portions 313, and the water flow cavity 340 is formed between the two support frames 310. By abutting the end faces of the two second ring portions 313, the two support frames 310 can be connected while the water flow cavity 340 is sealed, which is beneficial to saving processing steps and improving production efficiency.

[0090] In one embodiment, the first ring portions 312 of two adjacent filter modules 300 are detachably connected. The specific method of detachably connecting the two first ring portions 312 can refer to the connection method of the two second ring portions 313, and the connection method between the water distributor 60 and the filter module 300 can also refer to the connection method between the two second ring portions 313. In this way, modular assembly between different filter modules 300 can be facilitated. Furthermore, the end faces of the first ring portions 312 of two adjacent filter modules 300 abut against each other, so that while achieving the connection of the two adjacent filter modules 300, the first water outlets 330 of the two adjacent filter modules 300 can be connected, thereby saving processing steps and improving production efficiency.

[0091] Optionally, the support frame 310 is made of plastic. First, plastic is less expensive than other materials such as metal, which helps reduce the manufacturing cost of the filter module 300. Second, plastic has good corrosion resistance to various chemical substances and can be used for a long time in various corrosive environments, reducing damage to the filter module 300 and the frequency of replacement due to corrosion. Third, the low density of plastic reduces the overall weight of the support frame 310, making it easier to install, transport, and maintain. Fourth, due to its good processing properties, plastic can be manufactured into filter frames of various shapes and sizes through various processes such as injection molding and extrusion, facilitating the processing and shaping of the support frame 310. Of course, the present invention is not limited to this. In other embodiments, the support frame 310 can also be made of metal.

[0092] Optionally, the filter element 320 is made of metal. Metal is durable and stable, which can extend the service life of the filter element 320, thereby effectively filtering water for a long time and reducing replacement frequency and cost. Of course, the present invention is not limited to this. In other embodiments, the filter element 320 can also be made of plastic.

[0093] In this embodiment, the filter element 320 is configured as a metal filter. The metal filter has a sturdy structure and can withstand certain pressure and impact, ensuring safety during use. Furthermore, the metal filter can be customized according to user needs, such as customizing equipment of non-standard sizes, to meet the needs of different support frames 310. Furthermore, the metal filter can be flushed and easily cleaned. Of course, the present invention is not limited to this. In other embodiments, the filter element 320 can also be configured as a filter membrane.

[0094] Optionally, the filter element 320 and the support frame 310 are integrally injection molded. It should be noted that the filter element 320 is metal, while the support frame 310 is plastic. During the production process, the filter element 320 is first installed in a mold, and then the support frame 310 is formed through an injection molding process. In this way, the filter element 320 is welded to the surface of the plastic support frame 310 by the high temperature within the mold, thus allowing the filter element 320 and the support frame 310 to be integrally injection molded. Directly joining the filter element 320 to the plastic support frame 310 during the injection molding process avoids secondary processing steps such as heat smelting, welding, and riveting, thereby shortening assembly time and reducing production costs. Furthermore, embedding the filter element 320 within the support frame 310 can improve the installation strength of the filter element 320, enabling it to withstand greater loads and impacts. Of course, the present invention is not limited to this embodiment. In other embodiments, the filter element 320 and the support frame 310 can also be formed separately and then connected by bonding or welding.

[0095] In one embodiment, please refer to Figures 2 to 4 A water-isolating ring 210 is provided between the water inlet 201 and the water outlet 202 of the valve head 20. The water inlet 201 is connected to the outer peripheral side of the water-isolating ring 210, and the water outlet 202 is connected to the inner peripheral side of the water-isolating ring 210. The water distributor 60 is formed with a first water flow space 601 and a second water flow space 602. The second water flow space 602 is arranged outside the first water flow space 601. The axial sides of the first water flow space 601 are respectively connected to the first water outlet 330 and the inner peripheral side of the water-isolating ring 210. The axial sides of the second water flow space 602 are respectively connected to the outer peripheral side of the water-isolating ring 210 and the second water outlet 350, and are provided with guide blades 603 inclined relative to the axial direction. Specifically, the axial sides of the water distributor 60 are respectively connected to the filter module 300 and the water isolation ring 210. In the flushing mode and the filtering mode of the pre-filter, the first water flow space 601 and the second water flow space 602 of the water distributor 60 will maintain communication with the above-mentioned corresponding structures, that is, the pre-filter is a positive flushing filter. In the flushing mode and the filtering mode, the flow path of water flowing into the filter assembly 30 does not change.

[0096] In the filtering mode, the water inlet 201 and the water outlet 202 are opened, and the sewage outlet 102 is closed. After the water entering the water inlet 201 passes through the first water flow space 601 and enters the water filter chamber 101, it will flow from the outer periphery of the filter component 30 through the second water flow port 350 of the filter component 30 and enter the inner periphery of the filter component 30, thereby being filtered by the filter element 320. Impurities are intercepted by the filter element 320, and the filtered water flow will flow through the second water flow space 602 to the inner peripheral side of the water isolation ring 210, and finally flow to the water outlet 202.

[0097] In the flushing mode, the water inlet 201 and the sewage outlet 102 are opened, and the water outlet 202 is closed. The water entering the water inlet 201 still enters the water filter chamber 101 through the first water flow space 601. After the water flow flushes the surface of the filter element 320, the sewage will be discharged through the sewage outlet 102, thereby discharging the impurities previously intercepted, which can reduce the adhesion of impurities on the filter element 320, so as to ensure the filtering effect of the filter assembly 30 and improve the service life of the pre-filter.

[0098] Among them, the guide blades 603 arranged in the second water flow space 601 enable the water flow entering the water filter chamber 101 to form a vortex, so as to disturb the water flow and avoid the deposition of impurities. Especially in the flushing mode, the impurities can be better entrained in the water flow, thereby facilitating the discharge of impurities from the sewage outlet 102 along with the water flow.

[0099] In one embodiment, the water distributor 60 and the water isolation ring 210 are separately molded and sealed. Specifically, the water isolation ring 210 can be integrally molded with the plastic lining portion 22 of the valve head 20, and the water distributor 60 can be assembled with the filter module 300 first, and then the filter assembly 30 is assembled on the valve head 20, so that the water distributor 60 and the water isolation ring 210 are sealed and connected, and finally the valve head 20 and the filter bottle 10 are assembled. The sealed connection between the water distributor 60 and the water isolation ring 210 can avoid water leakage at the connection between the two, which would cause the unfiltered raw water and the filtered clean water to leak into each other, thereby ensuring the filtering effect of the pre-filter. Of course, in other embodiments, the water distributor 60 and the water isolation ring 210 can also be integrally molded.

[0100] In one embodiment, please refer to Figure 4 and Figure 5 The water distributor 60 includes an annular protrusion 610 protruding away from the filter module 300, and a first water flow space 601 is formed on the inner peripheral side of the annular protrusion 610, and the annular protrusion 610 is plugged into the water isolation ring 210. In this way, the fixed connection between the water distributor 60 and the water isolation ring 210 can be achieved, and at the same time, the sealed connection between the water distributor 60 and the water isolation ring 210 is facilitated. Among them, the annular protrusion 610 can be inserted into the water isolation ring 210, or the water isolation ring 210 can be inserted into the annular protrusion 610. The water distributor 60 and the water isolation ring 210 can be sealed by bonding or melt welding, or a sealing ring 1002 can be sleeved on the outer periphery of the annular protrusion 610, and the sealing ring 1002 is sealed with the inner periphery of the water isolation ring 210. Of course, in other embodiments, the water distributor 60 may be formed with a groove structure, and the water isolation ring 210 may be inserted into the groove of the water distributor 60, or the end surfaces of the water distributor 60 and the water isolation ring 210 may be butted against each other.

[0101] In one embodiment, please refer to Figure 4 and Figure 5The water distributor 60 further includes a first connecting ring 620 and a second connecting ring 630. The second connecting ring 630 is disposed outside the first connecting ring 620. A second water flow space 602 is formed between the first connecting ring 620 and the second connecting ring 630. The annular protrusion 610 protrudes from the first connecting ring 620 and is connected to the first connecting ring 620 in a stepped manner. The first connecting ring 620 abuts the end face of the water isolation ring 210. In this way, the stepped structure formed by the annular protrusion 610 protruding from the first connecting ring 620 can provide a positioning function for the insertion between the water distributor 60 and the water isolation ring 210. When the end face of the water isolation ring 210 abuts against the first connecting ring 620, it means that the annular protrusion 610 is inserted into the water isolation ring 210. Of course, in other embodiments, a stepped structure can also be formed on the inner circumference of the water isolation ring 210 for the end face of the annular protrusion 610 to abut.

[0102] In one embodiment, the outer periphery of the water distributor 60 is clamped to the inner periphery of the filter bottle 10. Figure 5 The outer circumference of the second connecting ring 630 is provided with a fixing protrusion 604, and the inner circumferential wall of the filter bottle 10 is correspondingly provided with a mounting groove, and the fixing protrusion 604 is snapped into the mounting groove. Specifically, there can be multiple fixing protrusions 604 and mounting grooves correspondingly provided. Through the one-to-one engagement of the two, the water distributor 60 and the filter bottle 10 are fixed in the circumferential direction to ensure that the water distributor 60 forms a swirl effect. Furthermore, due to the fixed connection between the water distributor 60 and the filter module 300, the water distributor 60 and the filter bottle 10 are relatively fixed in the circumferential direction, which can also keep each filter module 300 relatively fixed in the filter bottle 10, thereby ensuring the installation stability of the filter assembly 30 in the filter bottle 10.

[0103] In one embodiment, see Figure 3 The pre-filter also includes an exoskeleton 50, which is rotatably mounted on the outside of the filter assembly 30. In this way, the exoskeleton 50 can be rotated to disturb the water flow in the water filter chamber 101, thereby preventing impurities from being deposited and adhering to the filter assembly 30, the exoskeleton 50, and the side walls of the water filter chamber 101, reducing the possibility of clogging of the filter assembly 30, and thus ensuring the filtering effect of the filter assembly 30. In this embodiment, the exoskeleton 50 includes a side frame 512 and a chassis 511. The chassis 511 is connected to the side frame 512 and is located on the side away from the valve head 20. It has strong structural stability and high rotation stability. Of course, in other embodiments, the exoskeleton 50 may only include the side frame 512 structure.

[0104] In one embodiment, please refer to Figure 9 and 10The side frame 512 is also provided with a cleaning structure 90. The cleaning structures 90 and the siphon flow channel 501 are staggered. Multiple groups of cleaning structures 90 can also be provided circumferentially to clean at least one of the inner circumferential wall of the filter bottle 10 and the outer circumference of the filter module 300. In flushing mode, the rotation of the exoskeleton 50 and the cleaning effect of the cleaning structure 90 can sweep away impurities on the relevant structures, allowing the impurities to be discharged with the water flow, thereby preventing serious blockage of the filter assembly 30, ensuring the filtering effect of the filter assembly 30, and extending the service life of the pre-filter.

[0105] In one embodiment, see Figures 11 to 13 The cleaning structure 90 includes an inner cleaning brush 910 protruding from the inner circumference of the outer frame 50. The inner cleaning brush 910 includes a cleaning portion 911. The cleaning portion 911 extends in the axial direction of the outer frame 50. The cleaning portion 911 and the filter element 320 are correspondingly arranged so that the filter element 320 can be cleaned by the cleaning portion 911. Since the filter element 320 of the filter assembly 30 has a certain extension in the radial direction of the outer frame 50, the side portion of the cleaning portion 911 distributed in the axial direction of the outer frame 50 can be arranged opposite to the filter element 320. The filter element 320 can be scraped and cleaned by the side portion, which can relatively comprehensively cover the filter element 320, thereby increasing the cleaning area of ​​the filter element 320 by the cleaning portion 911 and largely avoiding dead corners. As a result, the cleaning effect of the pre-filter on the filter assembly 30 can be improved, thereby increasing the service life of the pre-filter.

[0106] In one embodiment, the cleaning portion 911 extends obliquely relative to the axial direction of the exoskeleton 50. In this way, the deformation capacity of the cleaning portion 911 in the axial direction of the exoskeleton 50 can be improved. It can be understood that the cleaning portion 911 and the filter element 320 will abut and fit in the axial direction of the exoskeleton 50. The cleaning portion 911 is easy to deform in the abutting and fitting direction between the two, which is conducive to reducing the pressure between the cleaning portion 911 and the filter element 320. Therefore, when the exoskeleton 50 and the filter assembly 30 rotate relative to each other, the friction between the cleaning portion 911 and the filter element 320 is reduced, so that the exoskeleton 50 can rotate smoothly relative to the filter assembly 30, so as to ensure that the cleaning portion 911 fully cleans the filter element 320 in the circumferential direction.

[0107] Furthermore, the cleaning portion 911 extends obliquely along the circumference of the exoskeleton 50 relative to the axial direction of the exoskeleton 50. It will be appreciated that the direction in which the cleaning portion 911 is inclined facilitates its deformation. In this embodiment, the exoskeleton 50 rotates circumferentially, and the cleaning portion 911 easily deforms circumferentially of the exoskeleton 50, which further reduces the friction between the cleaning portion 911 and the filter element 320, thereby ensuring smooth rotation of the exoskeleton 50. Furthermore, the cleaning portion 911 can more easily cover a larger area on the filter element 320, thereby enhancing the cleaning effect of the cleaning portion 911 on the filter element 320.

[0108] In one embodiment, a plurality of cleaning portions 911 are distributed along the axial direction of the outer frame 50, and one cleaning portion 911 is provided corresponding to one filter element 320. In this way, one cleaning portion 911 can clean one filter element 320 accordingly, thereby ensuring a cleaning effect on the filter assembly 30.

[0109] In one embodiment, see Figure 9 and Figure 10 , there are multiple cleaning structures 90 distributed in the circumferential direction of the outer skeleton 50. Among them, it can be that each cleaning structure 90 is provided with the same number of cleaning parts 911 corresponding to the number of filter elements 320. In this way, each filter element 320 will be cleaned by the cleaning parts 911 of multiple cleaning structures 90 distributed in the circumferential direction, which is beneficial to ensuring the cleaning effect of the filter assembly 30. Of course, it can also be that a cleaning structure 90 is only provided with cleaning parts 911 for some filter elements 320. By staggering the cleaning parts 911 on multiple cleaning structures 90 distributed in the circumferential direction, each filter element 320 is provided with at least one cleaning part 911. In this way, under the premise of ensuring the coverage of the filter element 320 by the cleaning structure 90, the friction between the cleaning part 911 and the filter element 320 can also be dispersed in the circumferential direction, which is beneficial to ensuring the stability and smoothness of the rotation of the outer skeleton 50.

[0110] The plurality of cleaning portions 911 are arranged along the same circumferential direction of the exoskeleton 50 and are tilted relative to the axial direction of the exoskeleton 50. This allows the tilt of the cleaning portions 911 to be conveniently adjusted based on the rotational direction of the exoskeleton 50, thereby reducing friction between the cleaning portions 911 and the cleaning surface and ensuring smooth rotation of the exoskeleton 50. For example, if the exoskeleton 50 needs to rotate clockwise, each cleaning portion 911 is tilted counterclockwise.

[0111] In one embodiment, see Figure 13In the schematic diagram on the right side, the cleaning portion 911 is tilted along the axial direction of the exoskeleton 50. The side of the cleaning portion 911 used to clean the filter element 320 is tilted relative to the filter element 320, which improves the fit between the cleaning portion 911 and the filter element 320 and facilitates the cleaning force of the cleaning portion 911 on the filter element 320, thereby ensuring the cleaning effect of the filter assembly 30 and extending the life of the pre-filter.

[0112] In one embodiment, see Figure 12 For multiple cleaning portions 911 located at the same axial position, the angle α between two adjacent cleaning portions 911 is an acute angle. This facilitates the spatial arrangement of the multiple cleaning portions 911 and helps ensure that the cleaning portions 911 cover the filter element 320 in the axial direction.

[0113] In one embodiment, see Figures 11 to 13 The inner cleaning brush 910 further includes a base portion 912, which is protruding from the inner circumference of the outer frame 50, and the cleaning portion 911 is connected to the outer circumference of the base portion 912. In this way, the base portion 912 can provide support for the cleaning portion 911 to enhance the structural strength of the inner cleaning brush 910. The cleaning portion 911 can be connected to the outer frame 50 through the base portion 912, without extending to the inner circumference of the outer frame 50 to connect to the outer frame 50. The cleaning portion 911 only needs to maintain axial coverage of the filter element 320. Of course, in other embodiments, the cleaning portion 911 can also be directly connected to the outer frame 50.

[0114] In one embodiment, one base portion 912 is provided with two cleaning portions 911 extending in opposite directions in the axial direction of the exoskeleton 50. Thus, the two cleaning portions 911 provided on one base portion 912 can clean two filter elements 320, thereby simplifying the structure of the cleaning structure 90. Of course, in other embodiments, the base portions 912 and cleaning portions 911 may be provided in a one-to-one correspondence.

[0115] Furthermore, a base portion 912 is provided at the connection between the two filter modules 300. Two cleaning portions 911 on the base portion 912 extend in opposite directions relative to the base portion 912 in the axial direction of the exoskeleton 50. This creates a space at the connection between the two adjacent filter modules 300 for accommodating the internal cleaning brush 910. The two cleaning portions 911 on the base portion 912 can be used to clean the filter elements 320 on adjacent sides of the two filter modules 300, respectively. This helps improve the compactness of the pre-filter's internal structure, thereby increasing the utilization of the internal space of the water filter chamber 101 and facilitating a miniaturized pre-filter design.

[0116] In this embodiment, the internal cleaning brush 910 has two types of structures. The internal cleaning brush 910 corresponding to the connection between the two filter modules 300 has two cleaning portions 911 extending in opposite directions in the axial direction of the outer skeleton 50 on a base portion 912. The internal cleaning brush 910 corresponding to the end of the filter assembly 30 only needs to have one cleaning portion 911 on the base portion 912. The structure of the internal cleaning brush 910 can be the structure of the aforementioned internal cleaning brush 910 split in half. Without loss of generality, in the former type of internal cleaning brush 910, the base portion 912 can be cylindrical, with the two cleaning portions 911 distributed on both sides of the axis of the cylinder. In the latter type of internal cleaning brush 910, the base portion 912 is configured as half a cylinder, and the cleaning portions 911 are connected to the circumference of the cylinder.

[0117] In one embodiment, see Figure 12 and Figure 13 , the cleaning portion 911 is configured as a sheet structure. In this way, the cleaning portion 911 is relatively thin, and the cleaning portion 911 can have an appropriate thickness d, and can have good deformation ability. When the cleaning portion 911 abuts against the filter element 320, it will not generate too much resistance to the filter element 320, thereby avoiding the situation where the filter element 320 is stuck and the exoskeleton 50 cannot rotate. It can be understood that the thickness of the cleaning portion 911 needs to be able to meet the requirements for deformation ability, and also ensure that the cleaning portion 911 has sufficient structural strength, and ensure the connection stability of the cleaning portion 911 and the base portion 912 or other related structures.

[0118] In one embodiment, the cleaning portion 911 and the filter element 320 are in interference fit. In this way, the cleaning portion 911 can clean the impurities in the filter element 320 more deeply, thereby enhancing the cleaning force of the cleaning structure 90 on the filter assembly 30, thereby ensuring the filtering effect of the filter assembly 30 and increasing the service life of the pre-filter. The degree of contact between the cleaning portion 911 and the filter element 320 needs to be within an appropriate range. While ensuring the cleaning force of the cleaning portion 911 on the filter element 320, the friction between the cleaning portion 911 and the filter element 320 will not be too large, thereby avoiding excessive interference with the rotation of the exoskeleton 50 and reducing wear on the cleaning portion 911.

[0119] In one embodiment, the cleaning structure 90 is detachably mounted to the exoskeleton 50. This allows for easy removal of the cleaning structure 90 and replacement of a new cleaning structure 90 when the cleaning portion 911 becomes excessively worn and no longer effectively cleans the filter assembly 30. In other embodiments, only the cleaning portion 911 may be removable and replaceable, thereby reducing pre-filter maintenance costs.

[0120] In one embodiment, see Figure 10 and Figure 11The cleaning structure 90 also includes a mounting portion 930, on which a plurality of internal cleaning brushes 910 are provided. The exoskeleton 50 is correspondingly provided with a mounting groove, and the mounting portion 930 is snapped into the mounting groove. It can be understood that the mounting portion 930 extends along the axial direction of the exoskeleton 50, and the plurality of internal cleaning brushes 910 are also distributed in the axial direction of the exoskeleton 50. In this way, a plurality of internal cleaning brushes 910 can be installed on the exoskeleton 50 through a mounting portion 930, and the mounting portion 930 and the exoskeleton 50 can be disassembled and assembled to replace the plurality of internal cleaning brushes 910, which can improve the convenience of maintenance of the cleaning structure 90. Of course, in other embodiments, the internal cleaning brush 910 can also be directly connected to the exoskeleton 50.

[0121] In one embodiment, see Figure 14 , some corners of the mounting portion 930 are configured as chamfered shapes, and the corresponding corners of the mounting slot are configured as the same chamfered shapes. Of the corners of the mounting portion 930, only some are configured as chamfered shapes, and the corners of the mounting slot are configured with corresponding chamfered shapes. This facilitates the matching of the mounting portion 930 and the corresponding corners of the mounting slot, and plays a foolproof role during the assembly process of the cleaning structure 90 and the exoskeleton 50, preventing the cleaning structure 90 from being installed upside down. Of course, in other embodiments, foolproofing can also be achieved through other means, such as providing a directional arrow on the outer side of the mounting portion 930.

[0122] In the embodiment of the present invention, the mounting portion 930 and the inner cleaning brush 910 are integrally formed. Specifically, the mounting portion 930 and the inner cleaning brush 910 are integrally formed, thereby facilitating the installation of the inner cleaning brush 910 and ensuring the stable installation of the inner cleaning brush 910.

[0123] Without loss of generality, see Figure 9 There are multiple siphon channels 501, cleaning structures 90 and water flow driving members 540. Multiple siphon channels 501 and multiple cleaning structures 90 are alternately distributed in the circumferential direction of the side frame 512. The water flow driving member 540 can be set corresponding to the cleaning structure 90. In this way, the flushing effect of the pre-filter can be guaranteed.

[0124] It should be noted that the multiple indicated in this solution should be understood as greater than or equal to two unless otherwise specified.

[0125] The present invention also provides a water system including a prefilter. The specific structure of the prefilter is similar to that of the above-described embodiments. Since the present water system utilizes all of the technical solutions of all of the above-described embodiments, it at least possesses all of the beneficial effects of the technical solutions of the above-described embodiments, and therefore will not be further detailed here. The water system includes at least the relevant components from the prefilter to the water supply terminal. For example, the water system may include household appliances such as a water heater, a dishwasher, and a water dispenser, as well as accessories such as water pipes for household water supply.

[0126] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pre-filter, characterized in that: include: A valve head and a filter bottle, wherein the filter bottle is formed with a water filter cavity, the valve head is provided with a water inlet and a water outlet connected to the water filter cavity, and a water isolation ring is provided between the water inlet and the water outlet, the water inlet is connected to the outer peripheral side of the water isolation ring, and the water outlet is connected to the inner peripheral side of the water isolation ring, and the filter bottle is provided with a sewage outlet connected to the water filter cavity on a side away from the valve head; as well as A filter assembly is provided in the water filter cavity and is located between the water inlet and the sewage outlet. The filter assembly includes a water distributor and a plurality of filter modules connected in sequence. The water distributor is located on a side close to the valve head. A water passage cavity is formed inside the filter module, a first water passage is provided in the axial direction of the filter module and is connected to the water passage cavity, a second water passage is provided in the circumferential direction of the filter module and is connected to the water passage cavity, the filter module includes a filter element provided at the second water passage, and the filter element is at least partially inclined; The water distributor is formed with a first water flow space and a second water flow space. The second water flow space is arranged outside the first water flow space. The axial sides of the first water flow space are respectively connected to the first water flow port and the inner circumference of the water isolation ring. The axial sides of the second water flow space are respectively connected to the outer circumference of the water isolation ring and the second water flow port, and are provided with guide blades inclined relative to the axial direction.

2. The prefilter according to claim 1, wherein The water distributor and the water isolation ring are formed separately and are sealed and connected.

3. The prefilter according to claim 1, wherein: The water distributor includes an annular convex portion protruding away from the filter module, the first water flow space is formed on the inner circumference of the annular convex portion, and the annular convex portion is plugged into the water isolation ring.

4. The prefilter according to claim 3, characterized in that The annular convex portion is inserted into the water-isolating ring, and a sealing ring is provided on the outer shell of the annular convex portion, and abuts against the inner peripheral wall of the water-isolating ring through the sealing ring.

5. The pre-filter according to claim 3, characterized in that: The water distributor also includes a first connecting ring and a second connecting ring, the second connecting ring is arranged outside the first connecting ring, the second water flow space is formed between the first connecting ring and the second connecting ring, the annular protrusion is protruded from the first connecting ring and is connected to the first connecting ring in a step-like shape, and the first connecting ring abuts against the end face of the water-isolating ring.

6. The prefilter according to claim 1, wherein: The water distributor is fixedly connected to the filter bottle.

7. The prefilter according to claim 6, wherein: The outer periphery of the water distributor is clamped to the inner peripheral wall of the filter bottle.

8. The pre-filter according to claim 7, characterized in that The water distributor also includes a first connecting ring and a second connecting ring, the second connecting ring is arranged outside the first connecting ring, the second water flow space is formed between the first connecting ring and the second connecting ring, and a fixing protrusion is convexly provided on the outer peripheral side of the second connecting ring. The inner peripheral wall of the filter bottle is correspondingly provided with an installation groove, and the fixing protrusion is clamped in the installation groove.

9. The prefilter according to claim 1, wherein: The water distributor and the filter module are fixedly connected.

10. The pre-filter according to claim 9, characterized in that A first connecting structure and a second connecting structure are respectively provided on both axial sides of the filter module. The first connecting structure of one filter module is used to be detachably connected to the second connecting structure of another filter module to fix the two filter modules. At least one of the first connecting structure and the second connecting structure can be detachably connected to the water distributor.

11. The prefilter according to claim 10, wherein: One of the first connecting structure and the second connecting structure is configured as a locking protrusion, and the other is configured as a locking groove, and the water distributor is correspondingly configured with a locking protrusion or a locking groove; And / or, one of the first connecting structure and the second connecting structure is configured as a hook, and the other is configured as a hook groove, and the water distributor is correspondingly configured with a hook or a hook groove.

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

13. The pre-filter according to claim 12, wherein: The support frame includes an oblique support portion, and the two ends of the oblique support portion are respectively connected to a first ring portion and a second ring portion. The two oblique support portions of the same filter module are connected through the second ring portion. The inner periphery of the first ring portion is provided with the first water outlet, and the second water outlet is provided on the oblique support portion.

14. The pre-filter according to claim 13, wherein: Each of the support frames is provided with the second ring portion, the two second ring portions of the same filter module are detachably connected, and the first ring portions of two adjacent filter modules are detachably connected.

15. The pre-filter according to claim 1, wherein The pre-filter also includes an exoskeleton, which is rotatably mounted on the outside of the filter assembly. The exoskeleton is provided with a cleaning structure, which includes an inner cleaning brush protruding from the inner circumference of the exoskeleton. The inner cleaning brush includes a cleaning portion, which extends in the axial direction of the exoskeleton. The cleaning portion is arranged corresponding to the filter element, and the cleaning portion is used to clean the filter element.

16. The pre-filter according to claim 15, characterized in that The cleaning portion extends along the circumference of the exoskeleton and is inclined relative to the axial direction of the exoskeleton; And / or, the cleaning portion is configured as a sheet-like structure; And / or, the side portion of the cleaning portion distributed in the axial direction of the outer skeleton is inclined.

17. The pre-filter according to claim 15, wherein: The cleaning parts are distributed in a plurality in the axial direction of the outer frame, one cleaning part is provided corresponding to one filter element, and two adjacent cleaning parts are provided at an acute angle; And / or, the inner cleaning brush further comprises a base portion, the base portion is protruding from the inner circumference of the outer frame, and the cleaning portion is connected to the outer circumference of the base portion.

18. The pre-filter according to claim 1, wherein The valve head and the filter bottle are connected by fasteners.

19. The pre-filter according to claim 18, wherein A first flange is convexly provided on the outer periphery of the filter bottle, and a second flange is convexly provided on the outer periphery of the valve head. The first flange and the second flange are in abutment with each other and are connected by fasteners.

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

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