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 at least two filtering modules which are sequentially connected in the first direction, and the two sides, distributed in the first direction, of each filtering module are provided with a first connecting structure and a second connecting structure respectively; the first connecting structure of one filtering module is used for being matched with the second connecting structure of the other filtering module, so that the two filtering modules are fixed; according to the technical scheme provided by the invention, the problem that the filter assemblies of different types of pre-filters cannot be shared can be solved.

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, currently in the market, a filter assembly of a corresponding type is generally provided for a pre-filter of a certain type, and filter assemblies of pre-filters of different types cannot be shared, which results in excessively high production costs. 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 solve the problem that filter assemblies between pre-filters of different models cannot be shared.

[0005] To achieve the above-mentioned purpose, the filter assembly proposed in the present invention is used for a pre-filter, comprising at least two filter modules connected in sequence in a first direction, and the filter modules are respectively provided with a first connecting structure and a second connecting structure on both sides distributed along the first direction, and the first connecting structure of one filter module is used to cooperate with the second connecting structure of another filter module to fix the two filter modules.

[0006] 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.

[0007] In one embodiment, a water flow cavity is provided inside the filter module, and the filter module is also formed with a first water flow port and a second water flow port connected to the water flow cavity. Two adjacent filter modules are connected through the first water flow port, and the filter module is also provided with a filter element arranged corresponding to the second water flow port.

[0008] 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.

[0009] 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 in the same filter module, the first water passage is formed on opposite sides of the two support frames.

[0010] In one embodiment, a third connecting structure is provided on the other side of one of the supporting frames away from the first water outlet, and a fourth connecting structure is provided on the other side of the other supporting frame away from the first water outlet. The third connecting structure of one supporting frame is used to cooperate with the fourth connecting structure of the other supporting frame to fix the two supporting frames.

[0011] In one embodiment, the third connection structure and the fourth connection structure are snap-connected.

[0012] In one embodiment, the supporting skeleton includes a first ring portion, a second ring portion, and an oblique supporting portion connecting the first ring portion and the second ring portion, the second water outlet is formed on the oblique supporting portion, the first water outlet is formed on the inner circumference of the first ring portion, and the first connecting structure and the second connecting structure are formed on the first ring portion.

[0013] In one embodiment, the third connection structure and the fourth connection structure are formed on the second ring portion.

[0014] In one embodiment, the filter element is gradually expanded in a direction from the first ring portion to the second ring portion.

[0015] In one embodiment, the filter element is at least partially arranged to be inclined.

[0016] In one embodiment, the walls of the first water outlets (330) of two adjacent filter modules (300) are in contact with each other. In one embodiment, the filter element is provided in the form of an annular pyramidal surface or an annular conical surface.

[0017] In one embodiment, the filter element is in the form of an annular conical surface, and the generatrix of the annular conical surface is arranged as a straight line or a concave arc.

[0018] The present invention also provides a pre-filter, which comprises the above-mentioned filter assembly.

[0019] The present invention also provides a water use system, comprising the above-mentioned pre-filter.

[0020] The technical solution of the present invention is to respectively arrange the first connecting structure and the second connecting structure on both sides of the filter module along the first direction, and the first connecting structure and the second connecting structure can cooperate and fasten with each other, so that the number of filter modules can be flexibly adjusted according to the model of the pre-filter (for example but not limited to the size of the filter bottle), thereby achieving the effect of adjusting the size of the filter component. Since the filter area on each filter module is fixed, by adjusting the number of filter modules, the total filter area of ​​the filter component can also be adjusted, so that a suitable filter area can be set, thereby achieving the effect of improving the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 A schematic structural diagram of a second embodiment of a filter assembly provided by the present invention; Figure 2 for Figure 1 A schematic cross-sectional view of a filter assembly is provided; Figure 3 A schematic structural diagram of a first viewing angle of an embodiment of a filtering module provided by the present invention; Figure 4 A schematic structural diagram of a second viewing angle of an embodiment of a filtering module provided by the present invention; Figure 5 A schematic diagram of an exploded structure of an embodiment of a filter module provided by the present invention; Figure 6 A schematic diagram of the exploded structure of the support frame of the filter module provided by the present invention; Figure 7 This is a schematic cross-sectional structural diagram of a first embodiment of a filter module provided by the present invention.

[0023] Description of Figure Numbers: 30. Filter assembly; 300. Filter module; 310. Support frame; 311. Oblique support portion; 312. First ring portion; 313. Second ring portion; 320. Filter element; 330. First water outlet; 340. Water passage cavity; 350. Second water outlet.

[0024] 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

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] It should be noted that the water supply end can be a tap, 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.

[0032] 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.

[0033] However, currently in the market, a filter assembly of a corresponding type is generally provided for a pre-filter of a certain type, and filter assemblies of pre-filters of different types cannot be shared, which results in excessively high production costs.

[0034] Reference Figures 1 to 3 Therefore, in order to solve the above problems, 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 at least two filter modules 300 connected in sequence in a first direction, and the filter modules 300 are respectively provided with a first connection structure and a second connection structure on both sides distributed along the first direction, and the first connection structure of one filter module 300 is used to cooperate with the second connection structure of another filter module 300 to fix the two filter modules 300.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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 is understandable 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 assembly 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. Both workers on the production line and ordinary consumers can easily complete the assembly and disassembly work.

[0039] It should be noted that the multiple indicated in this solution can be understood as two or more.

[0040] The first direction referred to in this solution 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 from the apex of the conical surface to the bottom surface.

[0041] 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 .

[0042] 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.

[0043] Optionally, a water passage cavity 340 is provided inside the filter module 300, and the filter module 300 is also formed with a first water passage 330 and a second water passage 350 connected to the water passage cavity 340. Two adjacent filter modules 300 are connected through the first water passage 330, and the mouth walls of the first water passages 330 of the two adjacent filter modules 300 are abutted against each other. The filter module 300 is also provided with a filter element 320 arranged corresponding to the second water passage 350. It can be understood that in the filtering flow path of the pre-filter, the second water passage 350, the water passage cavity 340 and the first water passage 330 are distributed in sequence along the upstream and downstream, that is, when the pre-filter is in a filtering state, the water flows through the second water passage 350, the water passage cavity 340 and the first water passage 330 in sequence and finally flows into the water use end.

[0044] Reference Figure 7 It should be noted that the filtering flow path of the filtering module 300 is as follows Figure 7 As 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.

[0045] The flushing flow path of the filter module 300 includes a forward flushing flow path and a back flushing flow path. Figure 7 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.

[0046] 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 end. 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.

[0047] Reference Figure 1 and Figure 4 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.

[0048] 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.

[0049] Reference Figure 5, optionally, the filter element 320 is at least partially inclined; it can be understood that the technical solution of the present invention increases the filtering area of ​​the filter element 320 relative to the solution in which the filter element 320 is planar by setting the filter element 320 at least partially inclined. Under the condition of the same axial height, the filtering area of ​​the filter element 320 can be increased. Due to the increase in the filtering area of ​​the filter element 320, it can withstand a larger flow load and improve the filtering efficiency. Moreover, since the filtering area of ​​the filter element 320 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.

[0050] Furthermore, the filter element 320 is annular and has an inner ring edge and an outer ring edge, and the outer ring edge is located on one axial side of the inner ring edge. It can be understood that the filter element 320 is arranged in an annular shape, and the outer ring edge of the filter element 320 is located on one 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 filtration area of ​​the filter element 320 can be increased, which means that under the same flow rate, the filter element 320 of this scheme can withstand a larger flow load and improve the filtration efficiency. Moreover, since the filtration area of ​​the filter element 320 of this scheme is large enough, even if a local area of ​​the filter element 320 is blocked, the remaining area of ​​the filter element 320 can continue to withstand a large flow load, which helps to extend the service life of the filter module 300 and reduce the replacement frequency, thereby reducing maintenance costs.

[0051] Secondly, the filter element 320 is arranged in an annular shape, and the outer ring edge is located on the axial side of the inner ring edge; this can increase the distance between the filter element 320 and the surrounding environment or another filter module 300, thereby reducing the probability of clogging of the filter module 300, and during backwashing, it is also helpful to flush impurities from the filter element 320.

[0052] In one embodiment, the filter element 320 is in a cone 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] Reference Figure 1 It should be noted that when the filter assembly 30 is constructed 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 .

[0058] 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 the filter module 300 located at the end is connected to the first water port 330 of the filter module 300 located in the middle, and the other is connected to the water port of the water-using end of the filter bottle. One first water port 330 of the other end filter module 300 is connected to the first water port 330 of the filter module 300 located in the middle, and the other first water port 330 is blocked.

[0059] 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 in a blocked state.

[0060] 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.

[0061] Reference Figures 3 to 7In 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. In the same filter module 300, the first water passage 330 is formed on the opposite sides of the two 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 covered 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] In one embodiment, a third connection structure is provided on the other side of a support frame 310 away from the first water outlet 330, and a fourth connection structure is provided on the other side of another support frame 310 away from the first water outlet 330. The third connection structure of one support frame 310 is used to cooperate with the fourth connection structure of another support frame 310 to fix the two support frames 310. It can be understood that this solution can avoid the use of external fasteners when installing the filter module 300 by setting the third connection structure on one support frame 310 and the fourth connection structure on the other support frame 310, which can facilitate the installation of the user; and it can also avoid the loss of fasteners after disassembly, causing the problem that the filter module 300 cannot be installed. Of course, this solution is not limited to this. In other embodiments, the third connection structure and the fourth connection structure can also be not set on the support frame 310, and the installation can be carried out through external fasteners, such as but not limited to glue, screws, etc.

[0066] Optionally, the support skeleton 310 includes a first ring portion 312, a second ring portion 313 and an inclined support portion 311 connecting the first ring portion 312 and the second ring portion 313, the second water outlet 350 is formed on the inclined 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. Such a support skeleton 310 has a simple structure and is easy to manufacture.

[0067] Among them, the first connecting structure and the second connecting structure are formed on the first ring portion 312, that is, the two adjacent filter modules 300 are connected through the first ring portion 312. 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 first connecting structure and the second connecting structure of the two adjacent filter modules 300 are formed on the first ring portion 312. In this way, the connection of the first water outlet 330 of the two adjacent filter modules 300 can be achieved while realizing the connection of the two adjacent filter modules 300, which is beneficial to saving processing steps and improving production efficiency.

[0068] In one embodiment, the third connection structure and the fourth connection structure are formed on the second ring portion 313. It can be understood that the second ring portion 313 is located at the edge of the support frame 310. The third connection structure and the fourth connection structure are arranged on the second ring portion 313 to avoid the third connection structure and the fourth connection structure from affecting the volume of the water passage cavity 340, thereby facilitating the increase in the utilization rate of the space of the support frame 310 and the increase in the volume of the water passage cavity 340. Of course, the present solution is not limited thereto. In other embodiments, the third connection structure and the fourth connection structure may also be formed on the oblique support portion 311.

[0069] The filter element 320 is gradually expanded in the direction from the first ring portion 312 to the second ring portion 313. The filter element 320 is arranged corresponding to the first ring portion 312 and the second ring portion 313. At this time, the outer diameter of the second ring portion 313 is larger than the outer diameter of the first ring portion 312, so that it is easy to install the support frame 310 and avoid the connection structure affecting the flow of water in the water cavity 340. In addition, 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 through the first ring portion 312, if bonding or welding is used for connection, it is necessary to open a communication 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 the production efficiency. Of course, the present solution is not limited to this. In other embodiments, the filter element 320 is gradually contracted in the direction from the first ring portion 312 to the second ring portion 313.

[0070] Further, in one embodiment, the third connection structure of a support frame 310 is used to be detachably connected with the fourth connection structure of another support frame 310 so that the two support frames 310 are fixed; it can be understood that the detachable connection allows the parts to be easily separated without damaging the connector itself or adjacent parts. This feature allows the filter module 300 to be operated quickly and effectively when the support 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 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.

[0071] Further, in some possible connection modes, the third connection structure and the fourth connection structure are snap-fitted. It can be understood that when the second ring portion 313 is made of plastic or metal, the snap-fitting 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-fitting 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.

[0072] 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.

[0073] 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.

[0074] 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: It comprises at least two filter modules connected in sequence in a first direction, wherein the filter modules are provided with a first connection structure and a second connection structure on both sides distributed along the first direction respectively, and 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.

2. The filter assembly according to claim 1, 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.

3. The filter assembly according to claim 1, characterized in that A water passage cavity is provided inside the filter module, and the filter module is also formed with a first water passage and a second water passage connected to the water passage cavity. Two adjacent filter modules are connected through the first water passage, and the filter module is also provided with a filter element arranged corresponding to the second water passage.

4. The filter assembly according to claim 3, 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.

5. The filter assembly according to claim 3, 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 in the same filter module, the first water passage is formed on opposite sides of the two support frames.

6. The filter assembly according to claim 5, characterized in that A third connection structure is provided on the other side of one of the support frames away from the first water outlet, and a fourth connection structure is provided on the other side of the other support frame away from the first water outlet. The third connection structure of one support frame is used to cooperate with the fourth connection structure of the other support frame to fix the two support frames.

7. The filter assembly according to claim 6, characterized in that The third connecting structure and the fourth connecting structure are snap-connected.

8. The filter assembly according to claim 6, characterized in that The supporting skeleton includes a first ring portion, a second ring portion and an oblique supporting portion connecting the first ring portion and the second ring portion, the second water outlet is formed on the oblique supporting portion, the first water outlet is formed on the inner circumference of the first ring portion, and the first connecting structure and the second connecting structure are formed on the first ring portion.

9. The filter assembly according to claim 8, characterized in that The third connection structure and the fourth connection structure are formed on the second ring portion.

10. The filter assembly according to claim 8, characterized in that The filter element is gradually expanded in a direction from the first ring portion to the second ring portion.

11. The filter assembly according to claim 3, characterized in that The filter element is at least partially arranged to be inclined; and / or The walls of the first water outlets of two adjacent filter modules are in contact with each other.

12. The filter assembly according to claim 3, characterized in that The filter element is arranged in the form of an annular pyramid surface or an annular conical surface.

13. The filter assembly according to claim 12, characterized in that The filter element is in the form of an annular conical surface, and the generatrix of the annular conical surface is arranged in the form of a straight line or a concave arc.

14. A pre-filter, characterized in that: The pre-filter comprises the filter assembly according to any one of claims 1 to 13.

15. A water system, characterized in that: Comprising the pre-filter as claimed in claim 14.

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