Pre-filter and water system

Abstract

The utility model discloses a prefilter and water consuming system relates to filter technical field, wherein prefilter comprises valve head, filter flask and filter subassembly, the valve head and filter flask screw joint mutually, filter flask forms the water filter cavity, and the valve head forms the water inlet channel and the water outlet channel that are spaced mutually, the water inlet channel is communicated with the water filter cavity through the water inlet, and the water outlet channel is communicated with the water outlet cavity through the water outlet. The filtering assembly comprises a filtering module, a water passing cavity is formed in the filtering module, a first water passing opening is formed in the axial direction of the filtering module, and the water passing cavity is communicated with the water outlet through the first water passing opening; a second water passing opening communicated with the water passing cavity is formed in the circumferential direction of the filtering module, the filtering module comprises a filtering piece arranged at the second water passing opening, and at least part of the filtering piece is obliquely 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, large particles harmful to the human body, such as silt, rust, and bloodworms, are present in the water, seriously affecting residents' water health. Therefore, a pre-filter is installed, which contains a filter assembly and other components to filter out large particles before the tap water is used. However, while the pre-filter is filtering the water, impurities may accumulate in the filter chamber, especially on the surface of the filter assembly. Over time, these impurities may clog the filter assembly and reduce its filtering effectiveness. 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 are screwed together, the filter bottle forms a water filter cavity, the valve head forms a water inlet channel and a water outlet channel spaced apart, the water inlet channel is connected to the water filter cavity through a water inlet, the water outlet channel is connected to the water filter cavity through a water outlet, and a sewage outlet is provided on a side of the filter bottle away from the valve head; and

[0006] A filter assembly is provided in the water filter chamber, and the filter assembly includes a filter module. A water flow chamber is formed inside the filter module. A first water flow port is provided in the axial direction of the filter module. The water flow chamber is connected to the water outlet through the first water flow port. A second water flow port connected to the water flow chamber is provided in the circumferential direction of the filter module. The filter module includes a filter element provided at the second water flow port, and the filter element is at least partially inclined.

[0007] In one embodiment, the valve head and the filter bottle are sealed by a first sealing ring and a second sealing ring, and the first sealing ring and the second sealing ring are respectively located on both axial sides of the threaded connection between the valve head and the filter bottle.

[0008] In one embodiment, the first sealing ring is located on a side of the second sealing ring close to the water inlet, and corresponding to the first sealing ring and the second sealing ring, an annular groove and a first step are respectively provided on the outer periphery of the filter bottle, and a second step and a third step are respectively provided on the inner periphery of the valve head. The first sealing ring is accommodated in a space formed by the annular groove and the second step structure, and the second sealing ring is accommodated in a space formed by the first step and the third step structure.

[0009] In one embodiment, the first sealing ring is located on a side of the second sealing ring close to the water inlet, the axial interference of the first sealing ring is smaller than the axial interference of the second sealing ring, and the radial interference of the first sealing ring is larger than the radial interference of the second sealing ring.

[0010] In one embodiment, the valve head includes a metal outer shell portion and a plastic lining portion, and the plastic lining portion is screwed and sealingly fitted to the filter bottle.

[0011] In one embodiment, an annular convex portion is convexly provided on the outer periphery of the filter bottle, and the valve head abuts against one axial side of the annular convex portion.

[0012] In one embodiment, a reinforcing rib is further provided on the outer periphery of the filter bottle, and the reinforcing rib is connected to a side of the annular protrusion facing away from the valve head.

[0013] In one embodiment, the filter assembly further includes a water distributor fixedly mounted on the filter bottle, the water distributor being arranged on the axial side of the filter module away from the sewage outlet, the water distributor being provided with a first water flow space and a second water flow space spaced apart from each other, the first water flow port and the water outlet being connected via the first water flow space, and the second water flow port and the water inlet being connected via the second water flow space.

[0014] In one embodiment, the first water flow port and the water outlet are both axially opposite to the first water flow space, and the second water flow port and the water inlet are both axially opposite to the second water flow space.

[0015] In one embodiment, the water distributor is inserted into the water outlet on the axial side facing away from the filter module, and the connection between the water distributor and the water outlet is sealed.

[0016] In one embodiment, the second water flow space is annularly arranged outside the first water flow space, and the second water flow space is provided with guide blades inclined relative to the axial direction.

[0017] In one embodiment, the water distributor includes a first connecting ring and a second connecting ring, the second connecting ring is arranged outside the first connecting ring, the first water flow space is formed in the first connecting ring, a grid structure is provided in the first connecting ring, and the second water flow space is formed between the first connecting ring and the second connecting ring.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] The utility model also provides a water use system, comprising the aforementioned pre-filter.

[0022] In the technical solution of the present invention, in the filtering mode, the water inlet and the water outlet are opened, and the sewage outlet is closed. After the water entering the water inlet passes through the first water flow space and enters the water filter cavity, it will flow from the outer periphery of the filter component through the second water flow port of the filter component and enter the inner periphery of the filter component, thereby being filtered by the filter element, and impurities will be 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; 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 passes through the first water flow space and enters the water filter cavity. 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 attachment of impurities on the filter element, so as to ensure the filtering effect of the filter element and improve the service life of the pre-filter. Furthermore, at the same axial height, the filtering area of ​​the filter element can be increased, 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, thereby ensuring the filtering effect of the filter assembly, helping to extend the service life of the filter module, reduce the replacement frequency, and thus reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 1 A schematic diagram of the external structure of an embodiment of a pre-filter provided by the utility model;

[0025] Figure 2 This is a structural diagram of an embodiment of a valve head of a pre-filter provided by the present invention;

[0026] Figure 3 This is a structural schematic diagram of an embodiment of a filter bottle of a pre-filter provided by the present invention;

[0027] Figure 4 A schematic cross-sectional view of an embodiment of a pre-filter provided by the present invention;

[0028] Figure 5 for Figure 4 A partial enlarged view of point A in the middle;

[0029] Figure 6 for Figure 4 A partial enlarged view of the middle part;

[0030] Figure 7 A partial structural cross-sectional view of an embodiment of a pre-filter provided by the present utility model;

[0031] Figure 8 A schematic structural diagram of an embodiment of a filter assembly of a pre-filter provided by the present invention;

[0032] Figure 9 for Figure 8 A schematic diagram of the connection structure of two filter modules in an embodiment;

[0033] Figure 10 for Figure 8 A schematic diagram of the connection structure of the two filter modules in another embodiment;

[0034] Figure 11 for Figure 8 Schematic diagram of the exploded structure of an embodiment of the filtering module in FIG.

[0035] Description of Figure Numbers:

[0036] 10. Filter bottle; 101. Water filter chamber; 102. Installation port;

[0037] 103, annular groove; 104, first step; 105, annular convex portion; 106, reinforcing rib;

[0038] 20. Valve head; 21. Metal shell; 22. Plastic lining;

[0039] 201. Water inlet; 202. Water outlet;

[0040] 203, second step; 204, third step;

[0041] 210, water inlet channel; 220, water outlet channel;

[0042] 30. Filter assembly; 300. Filter module; 301. First connection structure; 302. Second connection structure;

[0043] 310, supporting frame; 311, oblique supporting portion; 312, first ring portion; 313, second ring portion;

[0044] 320, filter element; 330, first water outlet; 340, water passage cavity; 350, second water outlet;

[0045] 60. Water distributor; 601. First water flow space; 602. Second water flow space; 603. Guide vane; 610. First connecting ring; 620. Second connecting ring;

[0046] 1001, first sealing ring; 1002, second sealing ring.

[0047] 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

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] See also Figures 1 to 4 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 801 on the side away from the valve head 20.

[0054] 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.

[0055] Among them, the connection method between the valve head 20 and the filter bottle 10 can be a threaded connection. Without loss of generality, an external thread section is formed at the port of the filter bottle 10 near the valve head 20, that is, the outer periphery of the port of the filter bottle 10 is provided with a thread, and correspondingly, the inner periphery of the valve head 20 is provided with a thread. By inserting the port of the filter bottle 10 into the valve head 20 and screwing the two together, the fixation between the two is achieved.

[0056] Please refer to Figure 2 、 Figure 4 and Figure 5 The valve head 20 comprises a connected metal outer shell 21 and a plastic inner liner 22. Both the water inlet 201 and the water outlet 202 are formed in the plastic inner liner 22. This allows water flowing through the valve head 20 to directly contact the plastic inner liner 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 or plastic component.

[0057] 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).

[0058] Specifically, the metal outer shell 21 and the plastic inner liner 22 are integrally formed by insert injection molding, and the plastic inner liner is internally threaded to mate with the externally threaded section of the filter bottle 10. Of course, in other embodiments, the metal outer shell 21 may be provided with an internally threaded section protruding from the plastic inner liner 22, and the metal outer shell 21 may be threadedly connected to the filter bottle 10 via the internally threaded section.

[0059] In one embodiment, please refer to Figures 3 to 5 The valve head 20 and the filter bottle 10 are sealed together by a first sealing ring 1001 and a second sealing ring 1002. The first sealing ring 1001 and the second sealing ring 1002 are located on either side of the threaded connection between the valve head 20 and the filter bottle 10. This creates a double seal at the connection between the valve head 20 and the filter bottle 10, preventing water from leaking out through the connection between the valve head 20 and the filter bottle 10, thereby ensuring the performance of the prefilter. Of course, in other embodiments, the sealed connection between the two can also be achieved by filling with waterproof glue.

[0060] Furthermore, the first sealing ring 1001 is located on the side of the second sealing ring 1002 close to the water inlet 201. Corresponding to the first sealing ring 1001 and the second sealing ring 1002, an annular groove 103 and a first step 104 are respectively provided on the outer circumference of the filter bottle 10, and a second step 203 and a third step 204 are respectively provided on the inner circumference of the valve head 20. The first sealing ring 1001 is accommodated in the space formed by the annular groove 103 and the second step 203, and the second sealing ring 1002 is accommodated in the space formed by the first step 104 and the third step 204. In this way, the annular groove 103 structure and the step structure can form an installation space for the sealing rings, which has a strong limiting effect on the sealing rings, thereby ensuring the stable installation of the first sealing ring 1001 and the second sealing ring 1002. Specifically, when connecting the valve head 20 and the filter bottle 10, the first sealing ring 1001 can be firstly sleeved on the annular groove 103, and the second sealing ring 1002 can be sleeved on the first step 104, and then the filter bottle 10 can be screwed into the valve head 20. When the filter bottle 10 and the valve head 20 are screwed into place, the first sealing ring 1001 can be located in the accommodating space formed by the annular groove 103 and the second step 203, and the second sealing ring 1002 can be located in the accommodating space formed by the first step 104 and the third step 204.

[0061] Furthermore, the first sealing ring 1001 is located on the side of the second sealing ring 1002 close to the water inlet 201. The axial interference of the first sealing ring 1001 is smaller than the axial interference of the second sealing ring 1002, and the radial interference of the first sealing ring 1001 is larger than the radial interference of the second sealing ring 1002. It can be understood that the axial interference of the first sealing ring 1001 is the difference between the axial width of the first sealing ring 1001 and the axial width of the accommodating space formed by the annular groove 103 and the third step 204. The axial interference of the second sealing ring 1002, the radial interference of the first sealing ring 1001, and the radial interference of the second sealing ring 1002 are also referred to in the same way. In this way, the first sealing ring 1001 can reliably seal the radial gap between the annular groove 103 and the third step 204, and the second sealing ring 1002 can reliably seal the axial gap between the first step 104 and the second step 203. By taking into account both radial sealing and axial sealing, the sealing performance of the connection between the valve head 20 and the filter bottle 10 is guaranteed.

[0062] In one embodiment, an annular protrusion 105 is formed on the outer periphery of the filter bottle 10, and the valve head 20 abuts against one axial side of the annular protrusion 105. This provides a positioning function for the assembly of the valve head 20 and the filter bottle 10. When the valve head 20 abuts the annular protrusion 105, it indicates that the threaded connection between the valve head 20 and the filter bottle 10 is in place. It will be appreciated that the first step 104 is also formed on this side of the annular protrusion 105. This allows the annular protrusion 105 to be reused, providing both a positioning structure for the valve head 20 to abut against and a mounting structure for the second sealing ring 1002.

[0063] Furthermore, if Figure 1 and Figure 3 As shown, the outer periphery of the filter bottle 10 is further provided with reinforcing ribs 106, which are connected to the side of the annular protrusion 105 facing away from the valve head 20. This improves the structural strength of the annular protrusion 105, thereby ensuring the stability of the connection between the valve head 20 and the filter bottle 10. Furthermore, the enhanced structural strength of the annular protrusion 105 by the reinforcing ribs 106 allows the size of the filter bottle 10 on the side of the annular protrusion 105 facing away from the valve head 20 to be reduced, which helps save material for the filter bottle 10 and thus reduces the production cost of the pre-filter.

[0064] In one embodiment, if Figure 4 As shown, the pre-filter also includes a filter assembly 30 disposed in the water filter chamber 101. After the raw water (such as tap water or well water) flows into the water inlet 201 from the external water source, it can flow through the filter assembly 30 for filtration. The filter assembly 30 can intercept large particles of impurities in the water and remove some precipitated impurities, rust, sand, mud, bacteria and other particulate impurities generated in the pipeline. It plays a good protective role 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.

[0065] In one embodiment, please refer to Figures 7 to 11 The filter assembly 30 includes a filter module 300, which has a water passage cavity 340 formed therein. A first water passage 330 is provided axially of the filter module 300, communicating with the water passage cavity 340. A second water passage 350 is provided circumferentially of the filter module 300, communicating with the water passage cavity 340. The filter module 300 includes a filter element 320 disposed at the second water passage 350. In filtering mode, raw water entering from the water inlet 201, passing through the water filtration cavity 101 and flowing toward the water outlet 202, can flow through the second water passage 350 and be filtered by the filter element 320.

[0066] Further, please refer to Figure 4 、 Figure 7 and Figure 8 The filter assembly 30 further includes a water distributor 60 fixedly mounted on the filter bottle 10. The water distributor 60 is disposed on the axial side of the filter module 300 away from the sewage outlet 801. The water distributor 60 is provided with a first water flow space 601 and a second water flow space 602 spaced apart from each other. The first water flow port 330 and the water outlet 202 are connected via the first water flow space 601, and the second water flow port 350 and the water inlet 201 are connected via the second water flow space 602. Specifically, a water inlet channel 210 and a water outlet channel 220 spaced apart from each other are formed in the valve head 20. The water inlet channel 210 is connected to the water filter chamber 101 via the water inlet 201, and the water outlet channel 220 is connected to the water filter chamber 101 via the water outlet 202.

[0067] In the filtering mode, the water inlet channel 210 and the water outlet channel 220 are both turned on, and the sewage outlet 801 is closed. The raw water entering the pre-filter from the water inlet channel 210 will flow through the water inlet 201 and the second water flow space 602 in sequence to the water filter chamber 101 on the outer peripheral side of the filter module 300, and then flow into the water flow chamber 340 through the second water flow port 350, thereby being filtered by the filter element 320, and the impurities in the raw water are intercepted by the filter element 320. Finally, the clean water filtered in the water flow chamber 340 will flow through the first water flow space 601 to the water outlet 202, and finally flow to the water use end through the water outlet channel 220.

[0068] In the flushing mode, the water inlet channel 210 and the sewage outlet 801 are both open, and the water outlet channel 220 is closed. The water flowing in from the water inlet channel 210 will enter the water filter chamber 101 through the water inlet 201 and the second water flow space 602 in sequence. Since the pre-filter is a positive flushing type, the flow direction of the water does not change for the filter module 300. However, due to the closure of the water outlet 202 channel and the opening of the sewage outlet 801, the water in the water filter chamber 101 flows through the second water flow port 350 into the water flow chamber 340 and will not flow through the second water flow port 350. The first water outlet 330 flows to the water outlet channel 220, and will still flow to the water filter chamber 101 on the outer periphery of the filter module 300 through the second water outlet 350. Thus, the filter element 320 at the second water outlet 350 can be flushed by the water flowing in and out of the water chamber 340. After the water flow flushes the surface of the filter element 320, the sewage will be discharged through the sewage outlet 801, 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.

[0069] Without loss of generality, the first water inlet 330 and the water outlet 202 are both axially opposed to the first water flow space 601, and the second water inlet 350 and the water inlet 201 are both axially opposed to the second water flow space 602. This facilitates communication between the first water inlet 330 and the water outlet 202, and between the second water inlet 350 and the water inlet 201. Of course, in other embodiments, the first water inlet 330 and the water outlet 202, or the second water inlet 350 and the water inlet 201, can be staggered, with communication achieved through an intermediate structure.

[0070] Furthermore, the water distributor 60 is inserted into the water outlet 202 on the axial side away from the filter module 300, and the connection between the water distributor 60 and the water outlet 202 is sealed. Without loss of generality, the other axial side of the water distributor 60 is connected to the filter module 300, which will cause the end face of the water distributor 60 to abut against the peripheral wall of the first water outlet 330. The first water outlet 330, the first water flow space 601 and the water outlet 202 are also connected in sequence. The outer periphery of the water distributor 60 is provided with a sealing ring, which abuts against the inner periphery of the water outlet 202 to avoid the outer periphery of the water distributor 60 and the inner periphery of the water outlet 202 from leaking, thereby ensuring that the flow path between the water inlet channel 210 and the water outlet channel 220 must pass through the filter element 320 at the second water outlet 350, thereby ensuring the filtering effect of the pre-filter. Of course, in other embodiments, the peripheral wall of the water outlet 202 may be inserted into the first water flow space 601 , or the end face of the water distributor 60 may abut against the peripheral wall of the water outlet 202 to achieve docking between the first water flow space 601 and the water outlet 202 .

[0071] For further information, please refer to Figure 8 The second water flow space 602 is arranged in an annular manner outside the first water flow space 601, and the second water flow space 602 is provided with a guide vane 603 that is inclined relative to the axial direction. In this way, when the water flows through the first water flow space 601, it will be affected by the guide vane 603, and a vortex can be formed to enter the water filter chamber 101, thereby disturbing the water flow and preventing the deposition of impurities. In particular, in the flushing mode, the impurities can be better entrained in the water flow, thereby facilitating the discharge of impurities from the sewage outlet 801 along with the water flow. Among them, the second water flow space 602 is arranged in an annular manner outside the first water flow space 601, and can have a portion opposite to the water inlet 201. The second water flow space 602 is arranged relative to the water filter chamber 101 on the outer peripheral side of the filter module 300, so as to guide the water flow to diffuse circumferentially in the water filter chamber 101, thereby ensuring the working efficiency of the pre-filter.

[0072] For details, please refer to Figure 8The water distributor 60 includes a first connecting ring 610 and a second connecting ring 620. The second connecting ring 620 is disposed outside the first connecting ring 610. The first water flow space 601 is formed within the first connecting ring 610, and a grating structure is provided within the first connecting ring 610. The second water flow space 602 is formed between the first connecting ring 610 and the second connecting ring 620. In this way, the first water flow space 601 can disperse the water flow through the grating structure, thereby ensuring smooth and uniform outflow from the water outlet channel 220. The radial sides of the guide vanes 603 are respectively connected to the first connecting ring 610 and the second connecting ring 620, thereby ensuring the structural stability of the guide vanes 603 and the second water flow space 602. In addition, the water distributor 60 can be fixedly connected to the filter bottle 10 via the second connecting ring 620. The second connecting ring 620 and the filter bottle 10 can be fixed in the circumferential direction by the engagement of the protrusions and grooves. Of course, in other embodiments, the second connecting ring 620 may not be provided, and the guide vanes 603 may be directly matched with the filter bottle 10 to achieve circumferential fixation of the water distributor 60 and the filter bottle 10 .

[0073] In one embodiment, please refer to Figure 8 , the filter assembly 30 includes a plurality of filter modules 300. The provision of a plurality of filter modules 300 improves the modularity of the filter assembly 30, and the number of filter modules 300 can be flexibly adjusted according to the model of the pre-filter (for example, but not limited to the size of the filter bottle 10), thereby achieving the effect of adjusting the size of the filter assembly 30, thereby solving the problem of sharing the filter assembly 30 of pre-filters of different models. Since the filtration area on each filter module 300 is fixed, by adjusting the number of filter modules 300, the total filtration area of ​​the filter assembly 30 can also be adjusted, so that a suitable filtration area can be set, thereby achieving the effect of improving the filtration effect. Among them, when multiple filter modules 300 are provided, the water distributor 60 is connected to a filter module 300 provided closer to the valve head 20.

[0074] In one embodiment, if Figure 9 and Figure 10 As 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.

[0075] Among them, it can be, such as Figure 10 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 9 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.

[0076] 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.

[0077] In one embodiment, the filter element 320 is at least partially inclined. In this way, at the same axial height, the filtering area of ​​the filter element 320 can be increased, 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 clogged, 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.

[0078] Without loss of generality, see Figure 11 The filter element 320 is annular and has an inner edge and an outer edge. The outer edge is located axially to one side of the inner edge. That is, the inner edge and the outer 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.

[0079] 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.

[0080] In one embodiment, if Figure 8 As shown, the filter assembly 30 includes a plurality of filter modules 300. The provision of multiple filter modules 300 enhances the modularity of the filter assembly 30. The number of filter modules 300 can be flexibly adjusted according to the model of the pre-filter (for example, but not limited to, the size of the filter bottle 10), thereby achieving the effect of adjusting the size of the filter assembly 30, thereby solving the problem of sharing the filter assembly 30 of pre-filters of different models. Since the filtration area on each filter module 300 is fixed, by adjusting the number of filter modules 300, the total filtration area of ​​the filter assembly 30 can also be adjusted, thereby enabling the appropriate filtration area to be set, thereby achieving the effect of improving the filtration effect.

[0081] In one embodiment, please refer to Figures 9 to 11 The filter module 300 includes two axially distributed support frames 310, with the water passage chamber 340 formed between the two support frames 310. Each support frame 310 is provided with a filter element 320, and the inner and outer annular edges of two adjacent filter elements 320 are arranged in opposite directions. It can be understood that, given a constant radial space within the water filter chamber 101, compared to a filter module 300 that maintains a tapered shape in one direction, a filter element 320 in the same filter module 300 that tapers in opposite directions can achieve a larger filtration area. In this way, this embodiment fully utilizes the space within the water filter chamber 101, creating a larger filtration area around the filter module 300, ensuring that the filter assembly 30 can withstand a greater flow load and improving filtration efficiency. At the same time, a sufficiently large water passage chamber 340 can be formed within the two support frames 310 to facilitate water flow. Of course, in other embodiments, a filter module 300 may also include only one support frame 310 , and the first water outlet 330 , the second water outlet 350 and the water passage cavity 340 are formed on the same support frame 310 .

[0082] In one embodiment, if Figure 11 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.

[0083] Specifically, the inclined support portion 311 includes a plurality of ribs spaced apart along the circumferential direction to form a plurality of second water outlets 350 spaced apart along the circumferential direction. The filter element 320 is stacked on the inclined support portion 311. In this way, the inclined support portion 311 can provide sufficient support to the filter element 320, and the total flow area of ​​the second water outlet 350 is large, so that the filter module 300 has sufficient flow capacity.

[0084] 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.

[0085] In one embodiment, if Figures 9 to 11 As 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 810 itself or adjacent components. This feature allows for quick and efficient maintenance and 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.

[0086] 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.

[0087] Optionally, in the same filter module 300, the end faces of the two second ring portions 313 abut against each other; it can be understood that in the same filter module 300, the two support skeletons 310 are connected through the two second ring portions 313, and the water flow cavity 340 is formed between the two support skeletons 310. By abutting the end faces of the two second ring portions 313, the two support skeletons 310 can be connected while the water flow cavity 340 is sealed, which is beneficial to saving processing steps and improving production efficiency.

[0088] In one embodiment, the first ring portions 312 of two adjacent filter modules 300 are detachably connected. The specific method of detachably connecting the two first ring portions 312 can refer to the connection method of the two second ring portions 313, and the connection method between the water distributor 60 and the filter module 300 can also refer to the connection method between the two second ring portions 313. In this way, modular assembly between different filter modules 300 can be facilitated. Furthermore, the end faces of the first ring portions 312 of the two adjacent filter modules 300 are abutted against each other, so that while the connection of the two adjacent filter modules 300 is achieved, the first water outlets 330 of the two adjacent filter modules 300 can be connected, thereby saving processing steps and improving production efficiency.

[0089] It should be noted that the multiple indicated in this solution should be understood as greater than or equal to two unless otherwise specified.

[0090] 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.

[0091] 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 are screwed together, the filter bottle forms a water filter cavity, and a water inlet channel and a water outlet channel are formed in the valve head. The water inlet channel is connected to the water filter cavity through a water inlet, and the water outlet channel is connected to the water filter cavity through a water outlet. A sewage outlet is provided on the side of the filter bottle away from the valve head; as well as A filter assembly is provided in the water filter chamber, and the filter assembly includes a filter module. A water flow chamber is formed inside the filter module. A first water flow port is provided in the axial direction of the filter module. The water flow chamber is connected to the water outlet through the first water flow port. A second water flow port connected to the water flow chamber is provided in the circumferential direction of the filter module. The filter module includes a filter element provided at the second water flow port, and the filter element is at least partially inclined.

2. The prefilter according to claim 1, wherein The valve head and the filter bottle are sealed by a first sealing ring and a second sealing ring, and the first sealing ring and the second sealing ring are respectively located on both axial sides of the threaded connection between the valve head and the filter bottle.

3. The prefilter according to claim 2, wherein: The first sealing ring is located on the side of the second sealing ring close to the water inlet. Corresponding to the first sealing ring and the second sealing ring, an annular groove and a first step are respectively provided on the outer periphery of the filter bottle, and a second step and a third step are respectively provided on the inner periphery of the valve head. The first sealing ring is accommodated in the space formed by the annular groove and the second step structure, and the second sealing ring is accommodated in the space formed by the first step and the third step structure.

4. The prefilter according to claim 2, wherein: The first sealing ring is located on a side of the second sealing ring close to the water inlet, the axial interference of the first sealing ring is smaller than the axial interference of the second sealing ring, and the radial interference of the first sealing ring is larger than the radial interference of the second sealing ring.

5. The prefilter according to claim 1, wherein: The valve head includes a metal outer shell and a plastic lining portion, and the plastic lining portion is screwed and sealingly fitted to the filter bottle.

6. The prefilter according to claim 1, wherein: An annular convex portion is convexly provided on the outer periphery of the filter bottle, and the valve head abuts against one axial side of the annular convex portion.

7. The prefilter according to claim 6, wherein: The outer periphery of the filter bottle is further provided with a reinforcing rib, and the reinforcing rib is connected to the side of the annular protrusion facing away from the valve head.

8. The prefilter according to claim 1, wherein: The filter assembly also includes a water distributor fixedly mounted on the filter bottle, the water distributor being arranged on the axial side of the filter module away from the sewage outlet, the water distributor being provided with a first water flow space and a second water flow space spaced apart from each other, the first water flow port and the water outlet being connected via the first water flow space, and the second water flow port and the water inlet being connected via the second water flow space.

9. The prefilter according to claim 8, characterized in that The first water passage and the water outlet are both axially opposite to the first water passage space, and the second water passage and the water inlet are both axially opposite to the second water passage space.

10. The pre-filter according to claim 8, characterized in that The water distributor is inserted into the water outlet at an axial side facing away from the filter module, and the connection between the water distributor and the water outlet is sealed.

11. The prefilter according to claim 8, wherein The second water flow space is arranged in an annular manner outside the first water flow space, and the second water flow space is provided with guide blades inclined relative to the axial direction.

12. The pre-filter according to claim 8, wherein The water distributor includes a first connecting ring and a second connecting ring, the second connecting ring is arranged outside the first connecting ring, the first water flow space is formed in the first connecting ring, a grid structure is provided in the first connecting ring, and the second water flow space is formed between the first connecting ring and the second connecting ring.

13. 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.

14. The pre-filter according to claim 13, 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.

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

16. A water system, characterized in that: The pre-filter comprises the pre-filter according to any one of claims 1 to 15.

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