Filter assembly, pre-filter and water system

Abstract

The invention discloses a filtering assembly, a pre-filter and a water consuming system.The filtering assembly comprises a plurality of filtering modules, a water passing cavity is formed in each filtering module, each filtering module is provided with a first water passing opening and a second water passing opening, and the first water passing openings and the second water passing openings are communicated with the water passing cavities; the second water passing opening is provided with a filtering part, the filtering part is annularly arranged and is provided with an inner ring edge and an outer ring edge, the outer ring edge is located on one axial side of the inner ring edge, and the multiple filtering modules are sequentially connected in the first direction; according to the technical scheme provided by the invention, the filtering area of the module can be filtered.

Description

Technical Field

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

[0002] At present, the pre-filter is the first coarse filtration equipment for water use in the whole house. It can filter out mud, rust, large particles, etc. in tap water, thereby preventing the large amount of precipitated impurities generated in the urban and community water supply network from causing harm to the human body.

[0003] However, the filter assembly of the existing pre-filter is a straight-cylinder filter screen structure with a small filter area, which results in a low filter efficiency of the filter assembly. Summary of the invention

[0004] The main purpose of the present invention is to provide a filter assembly, a pre-filter and a water use system, aiming to increase the filter area of ​​the filter assembly.

[0005] To achieve the above-mentioned purpose, the filter assembly proposed in the present invention is used for a pre-filter, and the filter assembly includes multiple filter modules. A water flow cavity is formed inside the filter module. The filter module is formed with a first water flow port and a second water flow port connected to the water flow cavity. The second water flow port is provided with a filter element. The filter element is arranged in an annular shape and has an inner ring edge and an outer ring edge. The outer ring edge is located on one axial side of the inner ring edge. Multiple filter modules are connected in sequence along a first direction.

[0006] In one embodiment, the filter modules are provided with a first connection structure and a second connection structure on both sides distributed along the first direction, respectively. The first connection structure of one filter module is used to cooperate with the second connection structure of another filter module to fix the two filter modules.

[0007] In one embodiment, the first connection structure of one filter module is used to be engaged with the second connection structure of another filter module.

[0008] In one embodiment, the first connection structure of one filter module is used to be threadedly connected to the second connection structure of another filter module.

[0009] In one embodiment, two adjacent filter modules are connected through the first water outlet, and the walls of the first water outlets of two adjacent filter modules are in contact with each other.

[0010] In one embodiment, the first connection structure and the second connection structure are the walls of the first water outlet, and the first connection structure and the second connection structure are fixed to each other by welding or bonding.

[0011] In one embodiment, the filter assembly further includes a water distributor, the water distributor is connected to the filter module, and a water flow space of the water distributor is arranged relative to the second water flow port.

[0012] In one embodiment, the water distributor is provided with a fifth connection structure on one side along the first direction, and the fifth connection structure is used to cooperate with the first connection structure or the second connection structure of the filter module to fix the water distributor and the filter module.

[0013] In one embodiment, the filter element is configured in a conical shape.

[0014] In one embodiment, the cone angle of the filter element ranges from 150° to 170°.

[0015] In one embodiment, the filter module includes a support frame, the water passage cavity is formed in the support frame, the first water passage and the second water passage are formed in the support frame, and the filter element is disposed on the support frame and covers the second water passage.

[0016] In one embodiment, the filter module includes two support frames distributed along the first direction, the water passage cavity is formed between the two support frames, and the first water passage and the second water passage are formed on at least one of the support frames.

[0017] In one embodiment, the support frame includes an inclined support portion, and the second water outlet is provided on the inclined support portion.

[0018] In one embodiment, the oblique support portion is formed with a plurality of the second water outlets distributed at intervals, and the filter module is provided with a filter element corresponding to each of the support frames, and the filter element is provided on the oblique support portion.

[0019] In one embodiment, the oblique support portion includes a plurality of support ribs spaced apart along the circumferential direction, and a second water outlet is formed between every two adjacent support ribs.

[0020] In one embodiment, the support ribs include a plurality of main support ribs and a plurality of secondary support ribs, the main support ribs on one support frame abut against the main support ribs on another support frame, and the secondary support ribs on one support frame are spaced apart from the secondary support ribs on another support frame.

[0021] In one embodiment, the support frame further includes a first ring portion and a second ring portion, two ends of the oblique support portion are respectively connected to the first ring portion and the second ring portion, and the first water outlet is provided on the inner periphery of the first ring portion.

[0022] In one embodiment, the two support frames are connected via the second ring portion, and the outer diameter of the second ring portion is greater than the outer diameter of the first ring portion.

[0023] In one embodiment, the two second ring parts are detachably connected.

[0024] In one embodiment, one of the second ring parts is provided with a first hook groove, and another of the second ring parts is provided with a first hook corresponding to the first hook groove, and the first hook is engaged in the first hook groove; or One of the second ring parts is provided with a first clamping groove, and the other of the second ring part is provided with a first clamping protrusion corresponding to the first clamping groove, and the first clamping protrusion is engaged in the first clamping groove.

[0025] In one embodiment, in the same filter module, end surfaces of two second ring portions are in contact with each other; and / or The end surfaces of the first ring portions of two adjacent filter modules are in contact with each other.

[0026] The present invention also provides a pre-filter, which comprises the above-mentioned filter assembly.

[0027] The present invention also provides a water use system, comprising the above-mentioned pre-filter.

[0028] The technical solution of the present invention is to set the filter element in an annular shape, and the outer ring edge of the filter element is located on the axial side of the inner ring edge. Under the condition of the same axial height, the filter area of ​​the filter element can be increased. Due to the increase in the filter area of ​​the filter element, it can withstand a larger flow load and improve the filtering efficiency; moreover, since the filter area of ​​the filter element is large enough, even if a local area of ​​the filter element is blocked, the remaining area of ​​the filter element can continue to withstand a large flow load, which helps to extend the service life of the filter module, reduce the replacement frequency, and thus reduce maintenance costs. Secondly, the filter assembly of the present solution includes multiple filter modules. Since the filter area on each filter module is fixed, the present solution can increase the total filter area of ​​the filter assembly by setting multiple filter modules, thereby improving the filtering efficiency; moreover, in the case where the filter element of a single filter module is tilted, setting multiple filter modules can further utilize space to form a larger filter area. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 A schematic structural diagram of a first viewing angle of an embodiment of a filter assembly provided by the present invention; Figure 2 A schematic structural diagram of a second viewing angle of an embodiment of a filter assembly provided by the present invention; Figure 3 A schematic cross-sectional view of a first embodiment of a filter assembly provided by the present invention; Figure 4 A schematic cross-sectional view of a second embodiment of a filter assembly provided by the present invention; Figure 5 A schematic structural diagram of a third embodiment of a filter assembly provided by the present invention; Figure 6 for Figure 5 A schematic cross-sectional view of a filter assembly is provided; Figure 7 for Figure 5 A schematic diagram of a partial cross-sectional structure of a filter assembly is provided; Figure 8 A partial structural schematic diagram of another embodiment of the filter assembly provided by the present invention; Fig. 9 for Figure 8 A schematic cross-sectional view of a portion of the structure of a filter assembly is provided; Fig.10 A schematic structural diagram of a first viewing angle of an embodiment of a filtering module provided by the present invention; Fig.11 A schematic structural diagram of a second viewing angle of an embodiment of a filtering module provided by the present invention; Fig.12 A schematic diagram of an exploded structure of an embodiment of a filter module provided by the present invention; Fig.13 A schematic diagram of the exploded structure of the support frame of the filter module provided by the present invention; Fig.14 A schematic cross-sectional view of a first embodiment of a filter module provided by the present invention; Fig.15 A schematic cross-sectional view of a second embodiment of a filter module provided by the present invention; Fig.16 A schematic structural diagram of a support frame of a filter module provided by the present invention from a first perspective; Fig.17 A schematic cross-sectional view of a first embodiment of a support frame of a filter module provided by the present invention; Fig.18 This is a schematic structural diagram of the water distributor provided by the present invention.

[0031] Description of Figure Numbers: 30. Filter assembly; 300. Filter module; 310. Support frame; 311. Oblique support portion; 311a. Main support ribs; 311b. Secondary support ribs; 312. First ring portion; 313. Second ring portion; 313a. First ring convexity; 313b. First ring groove; 320. Filter element; 330. First water outlet; 340. Water passage cavity; 350. Second water outlet; 60. Water distributor.

[0032] 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

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] Water use systems, such as whole-house water purification systems, are usually equipped with pre-filters, which are used to filter large particles in tap water. This not only ensures the safety of residents' water use, but also extends the service life of home appliances, prevents blockage of household water pipes, and improves the health of residents. The pre-filter is the first coarse filtration device in the whole-house water purification system. It is a physical filtration device that is mainly used to intercept large particles larger than 40 microns to protect the safety of back-end water use.

[0037] Some pre-filters on the market usually have a flushing function, that is, they can be cleaned regularly to discharge the large particles that were previously intercepted, thereby increasing the service life of the pre-filter.

[0038] The pre-filter comprises a filter bottle and a valve head connected to the filter bottle, the filter bottle has a water filter cavity, the valve head has a water inlet and a water outlet connected to the water filter cavity, the water inlet is connected to the water supply end, and the water outlet is connected to the water use end.

[0039] It should be noted that the water supply end can be a water pipe, a water tower or well water, and the water use end can be a faucet, a shower or a drinking water outlet, and this application does not make specific limitations on this.

[0040] Furthermore, the pre-filter also includes a filter assembly 30 disposed in the water filter cavity. The filter assembly 30 is disposed in the water filter cavity. After raw water (such as tap water or well water) flows into the water inlet from the external water source end, it can be filtered out of large particles in the water filter cavity by the filter assembly 30 when flowing through the water filter cavity. The filtered water then flows out of the pre-filter from the water outlet and flows to the water use end. In this way, through this process, the raw water can be roughly filtered.

[0041] However, the filter assembly of the existing pre-filter is a straight-cylinder filter screen structure with a small filter area, which results in a low filter efficiency of the filter assembly.

[0042] Reference Figure 5 and Figure 6 Therefore, in order to solve the above-mentioned problem, the present invention proposes a filter assembly 30. In one embodiment of the present invention, the filter assembly 30 is used for a pre-filter, and the filter assembly 30 includes a plurality of filter modules 300, wherein a water passage cavity 340 is formed inside the filter module 300, and the filter module 340 is formed with a first water passage 330 and a second water passage 350 communicating with the water passage cavity 340, and the second water passage 350 is provided with a filter element 320, and the filter element 320 is arranged in an annular shape and has an inner ring edge and an outer ring edge, and the outer ring edge is located on one axial side of the inner ring edge, and the plurality of filter modules 300 are sequentially connected along a first direction.

[0043] The technical solution of the present invention is to arrange the filter element 320 in a ring shape, and the outer ring edge of the filter element 320 is located on the axial side of the inner ring edge of the filter element 320, that is, the inner ring edge and the outer ring edge are not at the same height in the axial direction. Under the axial condition of the same height, the filtering area of ​​the filter element 320 can be increased, which means that under 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 and reduce the replacement frequency, thereby reducing maintenance costs.

[0044] Secondly, the filter assembly of the present solution includes multiple filter modules 300. Since the filter area on each filter module 300 is fixed, the present solution can increase the total filter area of ​​the filter assembly 30 by setting multiple filter modules 300, thereby improving the filter efficiency; moreover, when the filter element 320 of a single filter module 300 is tilted, setting multiple filter modules 300 can further utilize the space and form a larger filter area.

[0045] It should be noted that the multiple indicated in this solution can be understood as greater than or equal to two.

[0046] Reference Figures 7 to 9 Furthermore, the filter assembly 30 includes at least two filter modules 300 connected in sequence in a first direction, and the first connection structure and the second connection structure are respectively provided on both sides of the filter modules 300 distributed along the first direction. The first connection structure of a filter module 300 is used to cooperate with the second connection structure of another filter module 300 to fix the two filter modules 300.

[0047] The technical solution of the present invention is to respectively set the first connecting structure and the second connecting structure on both sides of the filter module 300 along the first direction, and the first connecting structure and the second connecting structure can cooperate with each other to be fastened. In this way, 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), so as to achieve the effect of adjusting the size of the filter component 30, thereby solving the problem of sharing the filter component 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 component 30 can also be adjusted, so that a suitable filtration area can be set, thereby achieving the effect of improving the filtration effect.

[0048] Secondly, since the first connecting structure and the second connecting structure are respectively provided on both sides of each filter module 300, the user can pick up two filter modules 300 at will and connect and fix them, which can avoid the user from searching for a suitable filter module 300 for installation, thereby improving the installation efficiency of the filter assembly 30.

[0049] Further, the first connection structure of a filter module 300 is used to be detachably connected to the second connection structure of another filter module 300. It can be understood that the detachable connection allows the parts to be easily separated without damaging the connector itself or adjacent parts. This feature allows the filter assembly 30 to be operated quickly and effectively when the filter module 300 needs to be repaired or replaced, reducing the difficulty and cost of maintenance. Since the detachable connection is easy to operate, it can greatly save time when the filter assembly 30 is maintained and replaced. Moreover, the detachable connection allows the faulty filter module 300 to be quickly replaced, thereby reducing the time of water outage in the water system and improving the maintenance efficiency. Secondly, compared with the non-detachable connection, the detachable connection reduces the situation of overall scrapping of components due to the inability to disassemble, reducing the waste of resources. Furthermore, the detachable connection allows the filter assembly 30 to be inspected and maintained regularly or irregularly to ensure its stability and safety, which helps to promptly discover and solve potential safety hazards.

[0050] Reference Figures 3 to 7 In one embodiment, the first connection structure of a filter module 300 is used to snap-fit ​​with the second connection structure of another filter module 300; it can be understood that the snap-fit ​​method does not require additional locking accessories, such as screws, nuts, etc., during assembly, thereby reducing the manufacturing cost and assembly cost of the filter component 30. Moreover, due to the flexible snap-fit ​​design, it can be customized according to the actual needs of the filter module 300, reducing material waste and improving material utilization. Secondly, the snap-fit ​​can achieve rapid assembly and disassembly without the need for complex tools and equipment. This greatly improves production efficiency and assembly efficiency, and also facilitates the maintenance and replacement of the filter module 300. Furthermore, the operation process of the snap-fit ​​is simple and clear, and easy to master. Whether it is workers on the production line or ordinary consumers, they can easily complete the assembly and disassembly work.

[0051] It should be noted that the first direction referred to in this scheme is the axial direction, that is, the axial direction of the inner ring edge of the filter element 320, that is, the height direction corresponding to the conical surface of the filter element 320. The axial direction is equivalent to the direction of the vertical line drawn from the apex of the conical surface to the bottom surface.

[0052] The circumferential direction referred to in this solution refers to the circumferential direction of the axis of the first direction, that is, the circumferential direction of the first water outlet 330 , and can also be understood as the circumferential direction of the inner ring edge of the filter element 320 .

[0053] Optionally, the first connection structure of a filter module 300 is used to be threadedly connected to the second connection structure of another filter module 300; it is understandable that the threaded connection, through the tight engagement of the threads, makes the connection position of the two filter modules 300 have higher tensile and compressive strengths, which can meet the use requirements under various working conditions. Moreover, after the threaded connection is assembled, the connection part is not easy to loosen, and a stable connection state can be maintained to ensure the normal operation of the filter assembly 30. Secondly, the structure of the threaded connection is relatively simple, easy to process and assemble, and reduces the manufacturing and maintenance costs. The connection or disassembly of the filter assembly 30 can be achieved by rotating the filter module 300, without the need for complex tools and equipment, thereby improving work efficiency.

[0054] Optionally, a water flow cavity 340 is provided inside the filter module 300, and the filter module 300 is also formed with a first water flow port 330 connected to the water flow cavity 340. Two adjacent filter modules 300 are connected through the first water flow port 330, and the mouth walls of the first water flow ports 330 of the two adjacent filter modules 300 are abutted against each other. It can be understood that by abutting the mouth walls of the first water flow ports 330, the water flow of the two adjacent filter modules 300 can be connected.

[0055] Optionally, the first connection structure and the second connection structure are the mouth wall of the first water outlet 330, and the first connection structure and the second connection structure are fixed to each other by welding; the welding connection method forms a larger contact area on the mouth wall connection surface of the first water outlet 330, so it has better firmness and shock resistance. The welded connection will not loosen due to heavy load, vibration or temperature change, thereby effectively enhancing the structural strength and stability of the two filter modules 300. Moreover, during the welding process, the molten metal will fill the gaps and tiny pores at the connection parts of the two filter modules 300 to form a continuous metal connection. This connection can effectively prevent the penetration of water flow and ensure the normal operation of the filter assembly 30.

[0056] Optionally, the first connection structure and the second connection structure are the mouth wall of the first water outlet 330, and the first connection structure and the second connection structure are fixed to each other by bonding; it can be understood that the bonding process is relatively simple, does not require complex equipment and tools, and is easy and quick to operate. This allows bonding to quickly and efficiently complete the task of connecting the two filter modules 300. Since the equipment and material costs required for the bonding process are relatively low, the overall cost is also relatively economical; this is conducive to reducing production costs and improving economic benefits. Secondly, bonding has good sealing properties, and the use of bonding can improve the sealing properties of the two filter modules 300, which can effectively prevent the penetration of water.

[0057] Reference Fig.14 It should be noted that the filtering flow path of the filtering module 300 is as follows Fig.14As shown by the solid arrows in the figure, in the filtering flow path of the pre-filter, the second water outlet 350, the water passage cavity 340 and the first water outlet 330 are sequentially distributed along the upstream and downstream, that is, when the pre-filter filters the water flow, the water flow in the filtering cavity of the filter bottle passes through the second water outlet 350, the water passage cavity 340 and the first water outlet 330 in sequence, and then flows into the water use end from the first water outlet 330.

[0058] The backwash flow path of the filter module 300 is as follows Fig.14 As shown by the dotted arrow, when the pre-filter is in the backwash state, the water flow at the water end flows into the first water outlet 330, the water chamber 340 and the second water outlet 350 in sequence, and then the large particles intercepted by the filter element 320 are backwashed and discharged, thereby increasing the service life of the pre-filter.

[0059] Reference Figure 5 It should be noted that when the filter assembly 30 includes multiple filter modules 300, multiple first water ports 330 are connected to form a water channel. In the filter flow path of the pre-filter, water flows in from the second water port of each filter module 300, and then enters the water cavity 340 of each filter module 300, and then converges into the water channel, and finally flows into the water section. In the backwash flow path of the pre-filter, the water flow at the water end first flows into the water channel, and then flows into the water cavity 340 of each filter module 300, and then is discharged from the second water port 350 of each filter module 300, so as to realize the backwash discharge of the large particles intercepted on the filter element 320.

[0060] Reference Fig.12 In one embodiment, the filter element 320 is in a conical shape, which makes it easier for impurities to slide off the surface of the filter element 320 and reduces the probability of impurities clogging the filter element 320.

[0061] Furthermore, the outer side surface of the filter element 320 is set in a conical surface. The design of the conical surface is conducive to the uniform distribution and smooth flow of the fluid, reduces the eddy current and turbulence of the fluid inside the filter module 300, and reduces energy loss. Specifically, the generatrix of the conical surface can be a straight line, or the generatrix of the conical surface can also be a concave arc line that is concave toward the inside of the water cavity 340, or the generatrix of the conical surface can also be a convex arc line that protrudes toward the outside of the water cavity 340.

[0062] In the second embodiment, the outer side surface of the filter element 320 is a pyramidal surface; the cross section of the pyramidal surface is a polygon, so that the filtering area of ​​the filter element 320 can be increased.

[0063] Furthermore, the first water outlet 330 is at least disposed on the inner periphery of one of the inner ring edge and the outer ring edge of the filter element 320 . Such a first water outlet 330 is simple to form and easy to manufacture.

[0064] In this embodiment, the first water outlet 330 is provided on both the inner ring edge and the outer ring edge. Of course, the present invention is not limited to this. In other embodiments, the first water outlet 330 can also be provided on only one ring edge, which can be set according to the actual application environment.

[0065] Reference Figure 6 Furthermore, the cone angle of the filter element 320 is in the range of 150° to 170°. The cone angle in this range can provide a larger water flow space between the filter module 300 and the environmental component, so that the flow area of ​​the second water port 350 can be increased while reducing the axial space of the filter bottle occupied by the filter element 320. Moreover, when the filter assembly 30 of the pre-filter is formed by a plurality of filter modules 300, the cone angle in this range can provide a larger water flow space between two adjacent filter modules 300 or between the filter module 300 and the environmental component, and can also ensure the filtration area of ​​the filter element 320, thereby improving the filtration efficiency of the filter assembly 30.

[0066] The cone angle of the filter element 320 is denoted as α, specifically, 150°≤α≤170°.

[0067] In this embodiment, the cone angle of the filter element 320 is 160°.

[0068] Reference Figures 1 to 4 It should be noted that when the filter assembly 30 is formed by a plurality of filter modules 300 , the plurality of filter modules 300 are distributed along the axial direction of the first water outlet 330 , and two adjacent filter modules 300 are connected through the first water outlet 330 .

[0069] Specifically, the two first water ports 330 of the filter module 300 located in the middle are respectively connected to the first water ports 330 of the adjacent filter modules 300, one first water port 330 of one end filter module 300 is connected to the first water port 330 of the middle filter module 300, and the other is connected to the water outlet of the pre-filter. One first water port 330 of the other end filter module 300 is connected to the first water port 330 of the middle filter module 300, and the other first water port 330 is blocked.

[0070] The filter assembly 30 may also include only one filter module 300. In this case, one first water outlet 330 of the filter module 300 is connected to the water outlet of the filter bottle, and the other first water outlet 330 is blocked.

[0071] It should be noted that the first water outlet 330 may be blocked by using a bottom connector during a later installation process, or may be blocked during a production process.

[0072] Reference Figures 10 to 13 Optionally, the filter module 300 includes a support frame 310, a water passage cavity 340 is formed in the support frame 310, a first water passage 330 and a second water passage 350 passing through the water cavity 340 are also formed in the support frame 310, the filter element 320 is arranged on the support frame 310 and covers the second water passage 350, and in the filter flow path of the pre-filter, the second water passage 350, the water passage cavity 340 and the first water passage 330 are distributed upstream and downstream in sequence; it can be understood that the support frame 310 can increase the supporting force of the filter module 300 on the filter element 320, and the at least partially inclined filter element 320 can increase the water passage area of ​​the filter module 300, thereby improving the filtering efficiency of the filter module 300.

[0073] Furthermore, a water passage cavity 340 is formed inside the support frame 310, a first water passage 330 is formed on the support frame 310, the support frame 310 also includes an inclined support portion 311, a second water passage 350 is disposed on the inclined support portion 311, the second water passage 350 is connected to the water passage cavity 340, the filter element 320 is disposed on the inclined support portion 311, and covers the second water passage 350. It can be understood that the inclined support portion 311 can support the filter element 320, thereby making the installation of the filter element 320 more stable.

[0074] Reference Fig.12 and Fig.13 In one embodiment, the support skeleton 310 also includes a first ring portion 312 and a second ring portion 313, and the two ends of the oblique support portion 311 are respectively connected to the first ring portion 312 and the second ring portion 313, the second water outlet 350 is formed on the oblique support portion 311, the first water outlet 330 is formed on the inner periphery of the first ring portion 312, and the first connecting structure and the second connecting structure are formed on the first ring portion 312. It can be understood that the two filter modules 300 are connected through the first water outlet 330, and the first water outlet 330 is arranged on the inner periphery of the first ring portion 312. In this scheme, the first connecting structure and the second connecting structure are arranged on the first ring portion 312, so that the sealing of the connection of the two first ring portions 312 can be ensured while the sealing of the two first water outlets 330 can be achieved.

[0075] In this embodiment, the filter module 300 includes two support frames 310 distributed along the first direction, and the water passage cavity 340 is formed between the two support frames 310. The first water passage 330 and the second water passage 350 are formed on at least one of the support frames 310. It can be understood that the filter module 300 is configured as two support frames 310 distributed along the axial direction, and they are overlapped with each other to form a water passage cavity 340 between the two support frames 310. The filter module 300 can be enclosed and formed by connecting the two support frames 310, which can reduce the production efficiency of the filter module 300.

[0076] Specifically, in the same filter module 300 , the first water inlet 330 is formed on opposite sides of the two supporting frames 310 .

[0077] Of course, the present invention is not limited to this. In the second embodiment, the filter module 300 may also include an inner ring, an outer ring, and two conical panels respectively connecting the opposite ends of the inner ring and the outer ring. The water flow chamber 340 is formed between the two conical panels, the inner ring and the outer ring. The first water flow port 330 is formed on the inner circumference of the inner ring, and the second water flow port 350 is formed on the conical panel.

[0078] In the third embodiment, the filter module 300 may also include a support frame 310 and a bottom plate, the bottom plate covers the side of the support frame 310 opposite to the filter element 320, the first water outlet 330 and the second water outlet 350 are formed on the support frame 310, and the water passage chamber 340 is formed between the support frame 310 and the bottom plate.

[0079] In the fourth embodiment, the plurality of support frames 310 include a plurality of side frames distributed along the circumferential direction, the side frames are provided with a through groove and an arc groove segment circumferentially arranged around the outer wall of the through groove, the plurality of side frames are connected so that the plurality of through grooves are covered to form a second water outlet 350, the plurality of arc groove segments are surrounded to form a water passage cavity 340 and a second water outlet 350, and the filter element 320 covers the arc groove segment to cover the second water outlet 350.

[0080] In this embodiment, the filter module 300 includes two support frames 310 distributed along the axial direction. Each support frame 310 is provided with an oblique support portion 311 , and a first ring portion 312 and a second ring portion 313 disposed at opposite ends of the oblique support portion 311 .

[0081] Furthermore, the two support frames 310 are connected by the second ring portion 313, and the outer diameter of the second ring portion 313 is larger than the outer diameter of the first ring portion 312, so that the support frame 310 can be easily installed to avoid the connection structure affecting the flow of water in the water chamber 340, and the second ring portion 313 is located at the periphery of the filter module 300. The two second ring portions 313 are used to connect the two support frames 310, which can improve the selection of connection methods, such as bonding or welding. When the two support frames 310 are connected by the first ring portion 312, if bonding or welding is used for connection, it is necessary to open a connecting port on the second ring portion 313, which not only affects the area of ​​the connection surface and the stability of the connection, but also increases the processing technology, thereby reducing production efficiency. Of course, the present invention is not limited to this. In other embodiments, the two support frames 310 can also be connected by the first ring portion 312.

[0082] Further, in one embodiment, the two second ring portions 313 are detachably connected; it is understood that the detachable connection allows the parts to be easily separated without damaging the connector itself or adjacent parts. This feature allows the filter module 300 to be operated quickly and effectively when the support frame 310 needs to be repaired or replaced, reducing the difficulty and cost of maintenance. Since the detachable connection is easy to operate, it can greatly save time when the filter module 300 maintains and replaces the support frame 310. Moreover, the detachable connection allows the fast replacement of the faulty support frame 310, thereby reducing the water outage time of the water system and improving the maintenance efficiency. Secondly, compared with the non-detachable connection, the detachable connection reduces the situation of the overall scrapping of the parts due to the inability to disassemble, reducing the waste of resources. Furthermore, the detachable connection allows the filter assembly 30 to be inspected and maintained regularly or irregularly to ensure its stability and safety, which helps to timely discover and solve potential safety hazards.

[0083] Reference Fig.15 and Fig.17 Furthermore, in some possible connection methods, the two second ring portions 313 are snap-fitted. It can be understood that when the second ring portion 313 is made of plastic or metal, the snap-fit ​​structure can be directly formed on the second ring portion 313, and no additional locking accessories, such as screws, nuts, etc., are required during assembly, thereby reducing manufacturing costs and assembly costs. Moreover, since the snap-fit ​​structure is flexible in design, it can be customized according to the actual needs of the second ring portion 313, reducing material waste and improving material utilization. Secondly, snap-fitting can achieve rapid assembly and disassembly without the need for complex tools and equipment. This greatly improves production efficiency and assembly efficiency, and also facilitates the maintenance and replacement of the filter module 300. Furthermore, the operation process of snap-fitting is simple and clear, and easy to master. Both workers on the production line and ordinary consumers can easily complete assembly and disassembly work.

[0084] In this embodiment, one of the second ring portions 313 is provided with a first hook groove, and the other second ring portion 313 is provided with a first hook corresponding to the first hook groove, and the first hook is engaged in the first hook groove. Such a snap-on structure is simple and easy to manufacture, and the first buckle has a certain elasticity, so that when the first hook is engaged in the first hook groove, the first hook avoids and is engaged in the first hook groove, so that the connection between the two second ring portions 313 can be more labor-saving.

[0085] The first hook includes an elastic arm disposed on the second ring portion 313 and a hook protrusion disposed on the free end of the elastic arm.

[0086] Furthermore, the first hook groove is provided on the inner circumferential surface of the second ring portion 313 and is provided in an annular shape. A plurality of first hooks are provided at intervals along the circumference of the second ring portion 313. Since the plurality of first hooks are all engaged in the same annular first hook groove, blind insertion can be achieved, which is conducive to improving installation efficiency. Of course, the present application is not limited to this. In other embodiments, a plurality of first hooks are provided at intervals along the circumference of the second ring portion 313, and a first hook groove is provided corresponding to a first hook.

[0087] In the second embodiment, one of the second ring parts 313 is provided with a first slot, and another of the second ring parts 313 is provided with a first protrusion corresponding to the first slot, and the first protrusion is engaged in the first slot. Such a structure is simple and easy to install.

[0088] Specifically, the first clamping groove is the first annular groove 313b, and the first clamping protrusion is the first annular protrusion 313a arranged corresponding to the first annular groove 313b, and the first annular protrusion 313a is clamped in the first annular groove 313b, so that the side walls of the first annular groove 313b and the first annular protrusion 313a can be used to fit each other, thereby improving the sealing of the connection between the two support frames 310. Of course, the present application is not limited to this, and in other embodiments, the fourth connection structure is a plurality of first clamping protrusions arranged at intervals along the circumferential direction, and the third connection structure is provided with a first clamping groove corresponding to a first clamping protrusion, and a first clamping protrusion is clamped in the first clamping groove.

[0089] It should be noted that the groove wall of the first annular groove 313b or the first annular protrusion 313a has a certain elastic deformation. When the first annular protrusion 313a is inserted, the groove wall of the first annular groove 313b or the first annular protrusion 313a elastically avoids, so that the first annular protrusion 313a is inserted into the first annular groove 313b, which is conducive to the engagement between the first annular groove 313b and the first annular protrusion 313a.

[0090] In some connection modes, the two second ring portions 313 are threadedly connected, and the threaded connection, through the tight meshing of the threads, makes the second ring portion 313 have high tensile and compressive strength, which can meet the use requirements under various working conditions. Moreover, after the threaded connection is assembled, the connection part is not easy to loosen, and a stable connection state can be maintained to ensure the normal operation of the filter module 300. Secondly, the structure of the threaded connection is relatively simple, easy to process and assemble, and reduces the manufacturing and maintenance costs. The connection or disassembly can be achieved by rotating the support frame 310, without the need for complex tools and equipment, thereby improving work efficiency.

[0091] Optionally, in the same filter module 300, the end faces of the two second ring portions 313 abut against each other; it can be understood that in the same filter module 300, the two support skeletons 310 are connected by the two second ring portions 312, 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 and the water flow cavity 340 can be sealed at the same time, which is beneficial to saving processing steps and improving production efficiency.

[0092] Furthermore, the end faces of the first ring portions 312 of the two adjacent filter modules 300 are abutted against each other; it can be understood that the two adjacent filter modules 300 are connected through the first ring portion 312, and it can be understood that the two adjacent filter modules are connected through the first water outlet 330, and the first water outlet 330 is formed on the inner periphery of the first ring portion 312. In this scheme, the end faces of the first ring portions 312 of the two adjacent filter modules 300 are abutted against each other, so that the connection of the two adjacent filter modules 300 can be achieved while the first water outlet 330 of the two adjacent filter modules 300 is achieved, which is beneficial to save processing steps and improve production efficiency.

[0093] Reference Figure 3 and Fig. 9 In some connection methods, the two second ring parts 313 are bonded to each other; the bonding process is relatively simple, does not require complex equipment and tools, and is easy and quick to operate. This allows bonding to quickly and efficiently complete the task of connecting the two second ring parts 313. Since the equipment and material costs required for the bonding process are relatively low, the overall cost is also relatively economical. This is conducive to reducing production costs and improving economic benefits. Secondly, bonding has good sealing properties. The use of bonding can improve the sealing properties of the two second ring parts 313 and effectively prevent water penetration.

[0094] In some connection methods, the two second ring portions 313 are welded; the welding connection method forms a larger contact area on the connection surface, so it has better firmness and shock resistance. The welded connection will not loosen due to heavy load, vibration or temperature change, thereby effectively enhancing the structural strength and stability of the workpiece. Moreover, during the welding process, the molten metal will fill the gaps and tiny pores in the connection parts to form a continuous metal connection. This connection can effectively prevent the penetration of water flow and ensure the normal operation of the filter module 300.

[0095] Among them, the welding method can be ultrasonic welding, hot plate welding and other welding methods.

[0096] Reference Figures 11 to 13Optionally, the oblique support portion 311 is formed with a plurality of second water outlets 350 spaced apart along the circumferential direction, and the filter element 320 is arranged to cover the oblique support portion 311. It can be understood that the arrangement of a plurality of second water outlets 350 can increase the amount of water passing through the filter module 300, thereby improving the filtering efficiency. Moreover, the arrangement of an annular filter element 320 and directly covering the oblique support portion 311 can increase the stability of the installation of the filter element 320, and compared with the solution of arranging a filter element 320 for each second water outlet 350, this can reduce the installation process. Of course, the present application is not limited to this. In other embodiments, the filter module 300 can also be provided with a filter element 320 corresponding to a second water outlet 350.

[0097] Reference Figures 10 to 13 Optionally, the oblique support portion 311 includes a plurality of support ribs spaced apart along the circumferential direction, a second water outlet 350 is formed between every two adjacent support ribs, and the first water outlet 330 is arranged on the inner circumference of the first ring portion 312. Such a support skeleton 310 is simple to form, and the support ribs can increase the strength of the oblique support portion 311, reducing the probability of the oblique support portion 311 breaking when the water flow is too large. Of course, the present invention is not limited to this. In other embodiments, the oblique support portion 311 can also be configured as a conical plate, and a plurality of second water outlets 350 are formed on the conical plate.

[0098] The two ends of the support rib are respectively connected to the first ring portion 312 and the second ring portion 313 , and the inner periphery of the first ring portion 312 of the support frame 310 is provided with a first water outlet 330 .

[0099] Reference Fig.10 and Fig.13 Optionally, the support ribs include a plurality of main support ribs 311a and a plurality of secondary support ribs 311b, the main support ribs 311a on one support frame 310 abut against the main support ribs 311a on another support frame 310, and the secondary support ribs 311b on one support frame 310 are spaced apart from the secondary support ribs 311b on another support frame 310; it can be understood that the main support ribs 311a on one support frame 310 abut against the main support ribs 311a on another support frame 310, which can improve the support strength between the two support frames 310, and the secondary support ribs 311b on one support frame 310 are spaced apart from the secondary support ribs 311b on another support frame 310, which can increase the gap between the two support frames 310, thereby increasing the flow area of ​​the water chamber 340, and further improving the filtering efficiency. Of course, the present invention is not limited to this, and in other embodiments, all the support ribs on one support frame 310 can also be spaced apart from all the support ribs on another support frame 310.

[0100] Among them, multiple main support ribs 311a and multiple secondary support ribs 311b are arranged alternately along the circumferential direction, which can further improve the support strength between the two support frames 310. Of course, the present invention is not limited to this. In some other embodiments, multiple main support ribs 311a and multiple secondary support ribs 311b can also be arranged in other ways, such as but not limited to, multiple main support ribs 311a and multiple secondary support ribs 311b are arranged alternately in different numbers along the circumferential direction. Specifically, along the circumferential direction, two main support frames are arranged first, and then a secondary support frame is arranged. Or, along the circumferential direction, two secondary support frames are arranged first, and then a main support frame is arranged.

[0101] Reference Figure 1 , Figure 3 , Figure 4 and Fig.18 Optionally, the filter assembly 30 further includes a water distributor 60, which is connected to the filter module 300, and the water flow space of the water distributor 60 is arranged relative to the second water flow port 350; the water distributor 60 can achieve uniform water distribution, ensuring that the water flow can evenly pass through each part of the second water flow port 350 of the filter module 300. This uniform water distribution helps to improve the filtering efficiency of the filter assembly 30 and avoid differences in filtering effects caused by uneven water flow distribution. Moreover, through the uniform water distribution of the water distributor 60, the water flow can fully contact the filter element 320 in the filter module 300, thereby more effectively removing impurities, odors, heavy metal ions and other harmful substances in the water. The water distributor 60 can also play a certain protective role on the filter module 300. Because it can ensure the uniform distribution of the water flow, it avoids the local scouring and wear of the filter module 300 by the water flow, thereby extending the service life of the filter module 300.

[0102] Optionally, the water distributor 60 is provided with a fifth connecting structure on one side along the first direction, and the fifth connecting structure is used to cooperate with the first connecting structure or the second connecting structure of the filter module 300 to fix the water distributor 60 and the filter module 300; it can be understood that the filter module 300 is provided with a first connecting structure and a second connecting structure on both sides along the first direction, and the water distributor 60 is provided with a fifth connecting structure along the first direction that cooperates with the first connecting structure or the second connecting structure of the filter module 300, so that it is convenient to connect the filter with the filter module 300, and avoid setting a separate connecting structure on the filter module 300 that is compatible with the water distributor 60. In particular, when the filter assembly 30 includes multiple filter modules 300 distributed along the first direction, it is advantageous for any two filter modules 300 to be connected to each other, and any filter module 300 can be connected to the water distributor 60. In this way, the connections can be made in any order, which can greatly improve the installation efficiency of the filter assembly 30. Moreover, it can also avoid providing a connection structure that is compatible with the fifth connection structure of the water distributor 60 on a single filter module 300, which not only requires the filter module 300 to be installed at the end, but also requires additional processing technology, which in turn leads to an increase in installation cost and a decrease in installation efficiency.

[0103] Furthermore, the water distributor 60 is detachably connected to the filter module 300, that is, the fifth connection structure is detachably connected to the first connection structure or the second connection structure; since the detachable connection method can be quickly installed and disassembled, when the water distributor 60 or the filter module 300 needs to be repaired or replaced, the problem can be quickly located and solved, avoiding unnecessary overall replacement, thereby reducing maintenance costs.

[0104] Optionally, in one embodiment, the water distributor 60 and the filter module 300 are snap-connected, that is, the fifth connecting structure is snap-connected with the first connecting structure or the second connecting structure; it can be understood that no additional locking accessories, such as screws, nuts, etc., are required during assembly, thereby reducing manufacturing costs and assembly costs. Moreover, since the snap-connection structure is flexible in design, it can be customized according to the actual needs of the water distributor 60 and the filter module 300, reducing material waste and improving material utilization. Secondly, snap-connection can achieve rapid assembly and disassembly without the need for complex tools and equipment. This greatly improves production efficiency and assembly efficiency, and also facilitates the maintenance and replacement of the filter assembly 30. Furthermore, the operation process of snap-connection is simple and clear, and easy to master. Whether it is workers on the production line or ordinary consumers, assembly and disassembly can be easily completed.

[0105] Optionally, in the second embodiment, the water distributor 60 is threadedly connected to the filter module 300, that is, the fifth connection structure is threadedly connected to the first connection structure or the second connection structure, and the threaded connection is tightly meshed through the threads, so that the threads of the water distributor 60 and the filter module 300 have high tensile and compressive strengths, which can meet the use requirements under various working conditions. Moreover, after the threaded connection is assembled, the connection part is not easy to loosen, and a stable connection state can be maintained to ensure the normal operation of the filter assembly 30. Secondly, the structure of the threaded connection is relatively simple, easy to process and assemble, and reduces the manufacturing and maintenance costs. Connection or disassembly can be achieved by rotating the threads of the water distributor 60 or the filter module 300, without the need for complex tools and equipment, thereby improving work efficiency.

[0106] Optionally, in the third embodiment, the water distributor 60 is bonded to the filter module 300, that is, the fifth connection structure is bonded to the first connection structure or the second connection structure; the bonding process is relatively simple, does not require complex equipment and tools, and is easy and quick to operate. This allows the bonding to quickly and efficiently complete the task of connecting the two second connection parts. Since the equipment and material costs required for the bonding process are relatively low, the overall cost is also relatively economical. This is conducive to reducing production costs and improving economic benefits. Secondly, bonding has good sealing properties. The bonding method can improve the sealing properties of the water distributor 60 and the filter module 300, which can effectively prevent the penetration of water flow.

[0107] Optionally, in the fourth embodiment, the water distributor 60 is welded to the filter module 300, that is, the fifth connection structure is welded to the first connection structure or the second connection structure. It can be understood that the welding connection method forms a larger contact area on the connection surface, so it has better firmness and shock resistance. The welded connection will not loosen due to heavy load, vibration or temperature change, thereby effectively enhancing the structural strength and stability of the workpiece. Moreover, during the welding process, the molten metal will fill the gaps and tiny pores of the connection parts to form a continuous metal connection. This connection can effectively prevent the penetration of water flow and ensure the normal operation of the filter assembly 30.

[0108] Among them, the welding method can be ultrasonic welding, hot plate welding and other welding methods.

[0109] The present invention also proposes a pre-filter, which includes a filter assembly. The specific structure of the filter assembly refers to the above-mentioned embodiment. Since the pre-filter adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0110] The present invention also proposes a water system, which includes a pre-filter. The specific structure of the pre-filter refers to the above embodiment. Since the water system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the water system at least includes related components from the pre-filter to the water end. For example, the water system can include household appliances such as water heaters, dishwashers, and water dispensers, and can also include accessories such as water pipes for domestic water in the whole house.

[0111] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

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

2. The filter assembly according to claim 1, characterized in that The filter modules are respectively provided with a first connection structure and a second connection structure on both sides distributed along the first direction. The first connection structure of one filter module is used to cooperate with the second connection structure of another filter module to fix the two filter modules.

3. The filter assembly according to claim 2, characterized in that The first connection structure of one filter module is used to be snap-connected with the second connection structure of another filter module.

4. The filter assembly according to claim 2, characterized in that The first connection structure of one filter module is used for threaded connection with the second connection structure of another filter module.

5. The filter assembly according to claim 2, characterized in that Two adjacent filter modules are connected through the first water outlet, and the walls of the first water outlets of the two adjacent filter modules are in contact with each other.

6. The filter assembly according to claim 5, characterized in that The first connection structure and the second connection structure are the opening walls of the first water outlet, and the first connection structure and the second connection structure are fixed to each other by welding or bonding.

7. The filter assembly according to claim 2, characterized in that The filter assembly further comprises a water distributor, which is connected to the filter module, and a water flow space of the water distributor is arranged relative to the second water flow port.

8. The filter assembly according to claim 7, characterized in that The water distributor is provided with a fifth connection structure on one side along the first direction, and the fifth connection structure is used to cooperate with the first connection structure or the second connection structure of the filter module to fix the water distributor and the filter module.

9. The filter assembly according to claim 1, characterized in that The filter element is arranged in a conical shape.

10. The filter assembly according to claim 9, characterized in that The cone angle of the filter element ranges from 150° to 170°.

11. The filter assembly according to any one of claims 1 to 10, characterized in that: The filter module comprises a support frame, the water passage cavity is formed in the support frame, the first water passage and the second water passage are formed in the support frame, and the filter element is arranged on the support frame and covers the second water passage.

12. The filter assembly according to claim 11, characterized in that The filter module includes two support frames distributed along the first direction, the water passage cavity is formed between the two support frames, and the first water passage port and the second water passage port are formed on at least one of the support frames.

13. The filter assembly according to claim 12, characterized in that The support frame includes an oblique support portion, and the second water outlet is arranged on the oblique support portion.

14. The filter assembly according to claim 13, characterized in that The oblique support portion is formed with a plurality of the second water outlets which are distributed at intervals. The filter module is provided with a filter element corresponding to each of the support frames. The filter element is arranged on the oblique support portion.

15. The filter assembly according to claim 14, characterized in that The oblique support portion includes a plurality of support ribs spaced apart along the circumferential direction, and a second water outlet is formed between every two adjacent support ribs.

16. The filter assembly according to claim 15, characterized in that The support ribs include a plurality of main support ribs and a plurality of secondary support ribs. The main support ribs on one support frame abut against the main support ribs on another support frame, and the secondary support ribs on one support frame are spaced apart from the secondary support ribs on another support frame.

17. The filter assembly according to claim 13, characterized in that The support frame further includes a first ring portion and a second ring portion, two ends of the oblique support portion are respectively connected to the first ring portion and the second ring portion, and the first water outlet is disposed on the inner periphery of the first ring portion.

18. The filter assembly according to claim 17, characterized in that The two support frames are connected via the second ring portion, and the outer diameter of the second ring portion is greater than the outer diameter of the first ring portion.

19. The filter assembly according to claim 18, characterized in that The two second ring parts are detachably connected.

20. The filter assembly according to claim 19, characterized in that One, the second ring portion is provided with a first hook groove, and another, the second ring portion is provided with a first hook corresponding to the first hook groove, and the first hook is engaged in the first hook groove; or One of the second ring parts is provided with a first clamping groove, and the other of the second ring part is provided with a first clamping protrusion corresponding to the first clamping groove, and the first clamping protrusion is engaged in the first clamping groove.

21. The filter assembly according to claim 17, wherein: In the same filtering module, the end faces of the two second ring parts are in contact with each other; and / or The end surfaces of the first ring portions of two adjacent filter modules are in contact with each other.

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

23. A water system, characterized in that: Comprising the pre-filter as claimed in claim 16.

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