Pre-filter and water system

Abstract

The utility model discloses a prefilter and water consuming system relates to filter technical field, wherein prefilter includes casing, filtration subassembly and outer skeleton, casing is equipped with the water filtration chamber, filtration subassembly and outer skeleton are provided in the water filtration chamber, outer skeleton sleeve is provided at the outer periphery of filtration subassembly, and the outer skeleton is provided with the water filtration chamber. The outer framework and the filtering assembly can rotate relatively, the outer framework is provided with a cleaning structure, the cleaning structure comprises an inner cleaning brush arranged on the inner circumferential side of the outer framework in a protruding mode, and the inner cleaning brush comprises a cleaning part; the filtering assembly is provided with a filtering surface extending in the radial direction of the outer framework, the cleaning part extends in the axial direction of the outer framework, the cleaning part and the filtering surface are correspondingly arranged, and the cleaning part is used for cleaning the filtering surface. According to the technical scheme provided by the utility model, the cleaning effect of the pre-filter on the filtering component is improved, so that the service life of the pre-filter is prolonged.

Description

Technical Field

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

[0002] As people's living standards continue to improve, their demands for daily water use are also increasing. Due to long-term disrepair and aging of tap water pipes, large particles harmful to the human body, such as silt, rust, and bloodworms, are present in the water, seriously affecting residents' water safety. Therefore, a pre-filter, equipped with a filter assembly and other structures, is required to filter out large particles before the tap water is used.

[0003] However, while the pre-filter is filtering water, impurities will adhere to the water filter cavity, especially the surface of the filter component, which will clog the filter component over time and reduce the filtering effect of the filter component. Therefore, a cleaning structure is usually provided to clean the filter component, but the cleaning structure in the prior art is often not designed reasonably, resulting in limited cleaning effect of the filter component. Utility Model Content

[0004] The main purpose of the utility model is to provide a pre-filter and a water system, aiming to improve the cleaning effect of the pre-filter on the filter component and to increase the service life of the pre-filter.

[0005] To achieve the above-mentioned purpose, the pre-filter proposed by the present invention comprises:

[0006] The housing has a water filtering cavity;

[0007] A filter assembly is disposed in the water filter cavity; and

[0008] An exoskeleton is disposed in the water filter cavity and sleeved on the outer periphery of the filter assembly, wherein the exoskeleton and the filter assembly are relatively rotatable, and the exoskeleton is equipped with a cleaning structure, wherein the cleaning structure includes an inner cleaning brush protruding from the inner periphery of the exoskeleton, and the inner cleaning brush includes a cleaning portion;

[0009] The filter assembly has a filter surface extending in the radial direction of the outer skeleton, the cleaning portion extends in the axial direction of the outer skeleton, the cleaning portion is arranged corresponding to the filter surface, and the cleaning portion is used to clean the filter surface.

[0010] In one embodiment, the cleaning portion extends obliquely relative to the axial direction of the outer frame.

[0011] In one embodiment, the cleaning portion extends along the circumferential direction of the exoskeleton at an angle relative to the axial direction of the exoskeleton.

[0012] In one embodiment, the inner cleaning brush further comprises a base portion, the base portion is protruding from the inner circumference of the outer frame, and the cleaning portion is connected to the outer circumference of the base portion.

[0013] In one embodiment, one base portion is correspondingly provided with two cleaning portions extending in opposite directions in the axial direction of the outer skeleton.

[0014] In one embodiment, a plurality of the cleaning portions and the filtering surfaces are correspondingly distributed in the axial direction of the outer skeleton.

[0015] In one embodiment, the plurality of cleaning portions are arranged along the same circumferential direction of the outer frame and are inclined relative to the axial direction of the outer frame.

[0016] In one embodiment, the filter assembly includes a plurality of filter modules, and one filter module is formed with two filter surfaces that are opposite to each other in the axial direction.

[0017] In one embodiment, two adjacent cleaning portions are arranged at an acute angle therebetween.

[0018] In one embodiment, the angle between two adjacent cleaning portions is 60 degrees to 80 degrees.

[0019] In one embodiment, the side portion of the cleaning portion distributed in the axial direction of the outer skeleton is inclined, and the filtering surface is in a corresponding annular cone shape.

[0020] In one embodiment, the filter assembly includes a plurality of filter modules distributed along the axial direction, and one of the filter modules is provided with two filter surfaces that are tapered in opposite directions. The internal cleaning brush also includes a base portion, which is protruded from the inner circumference of the outer skeleton and is arranged corresponding to the connection between the two filter modules. The outer circumference of one of the base portions is provided with two cleaning portions that extend in opposite directions in the axial direction of the outer skeleton.

[0021] In one embodiment, the cleaning portion is configured as a sheet-like structure.

[0022] In one embodiment, the cleaning portion has a thickness of 0.5 mm to 1 mm.

[0023] In one embodiment, the cleaning portion and the filter surface are in interference contact.

[0024] In one embodiment, the interference between the cleaning portion and the filter surface is 0.8 mm to 1.2 mm.

[0025] In one embodiment, the cleaning structure is detachably mounted on the outer frame.

[0026] In one embodiment, the cleaning structure further includes a mounting portion, a plurality of the inner cleaning brushes are provided on the mounting portion, the outer frame is correspondingly provided with a mounting groove, and the mounting portion is snap-connected to the mounting groove.

[0027] In one embodiment, some corners of the mounting portion are configured to be chamfered, and corresponding corners of the mounting groove are configured to be the same chamfered.

[0028] In one embodiment, a plurality of cleaning structures are distributed in the circumferential direction of the outer skeleton.

[0029] The utility model also provides a water use system, which includes the aforementioned pre-filter.

[0030] In the technical solution of the present invention, the filter surface of the filter assembly extends in the radial direction of the exoskeleton, while the cleaning portion extends in the axial direction of the exoskeleton. The cleaning portion and the filter surface are arranged correspondingly so that the filter surface can be cleaned by the cleaning portion. In this way, the side portion of the cleaning portion distributed in the axial direction of the exoskeleton can be arranged opposite to the filter surface. By scraping the filter surface through the side portion, the filter surface can be covered more comprehensively, thereby increasing the cleaning area of ​​the filter surface by the cleaning portion and avoiding dead corners to a large extent. As a result, the cleaning effect of the pre-filter on the filter assembly can be improved, thereby increasing the service life of the pre-filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of the external structure of an embodiment of a pre-filter provided by the utility model;

[0033] Figure 2 A schematic cross-sectional view of an embodiment of a pre-filter provided by the present invention;

[0034] Figure 3 This is a schematic cross-sectional view of an embodiment of the exoskeleton and filter assembly of the pre-filter provided by the present invention;

[0035] Figure 4 A schematic structural diagram of an embodiment of an exoskeleton provided by the present utility model;

[0036] Figure 5 for Figure 4 A schematic diagram of the structure of the exoskeleton from another perspective;

[0037] Figure 6 for Figure 4 Schematic diagram of the transverse cross-sectional structure of the exoskeleton;

[0038] Figure 7 This is a structural diagram of an embodiment of the cleaning structure of the exoskeleton provided by the present invention;

[0039] Figure 8 for Figure 7 A schematic diagram of the cleaning structure from another perspective;

[0040] Figure 9 for Figure 7 A schematic diagram of the cleaning structure from another perspective;

[0041] Figure 10 for Figure 7 A schematic diagram of the cleaning structure from another perspective.

[0042] Description of Figure Numbers:

[0043] 10. Filter bottle; 101. Water filter chamber; 102. Sewage outlet;

[0044] 20. Valve head; 21. Metal shell; 22. Plastic lining; 201. Water inlet; 202. Water outlet;

[0045] 30. Filter assembly; 300. Filter module; 301. Filter surface;

[0046] 50. Exoskeleton;

[0047] 90. Cleaning structure; 910. Internal cleaning brush; 911. Cleaning unit; 912. Base unit; 930. Mounting unit;

[0048] 1001. Fasteners.

[0049] 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

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0051] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0052] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0053] Water systems, such as whole-house water purification systems, typically feature a pre-filter to remove large particles from tap water. This not only ensures water safety but also extends the life of appliances, prevents clogged household water pipes, and improves residents' health. The pre-filter is the first coarse filtration device in a whole-house water purification system and is a physical filtration device used to protect back-end water safety.

[0054] The utility model proposes a pre-filter, which has a filtering mode and a flushing mode. In the filtering mode, the pre-filter can filter large particulate matter before the water end. In the flushing mode, the pre-filter can clean the filter components inside it to discharge the large particulate matter previously intercepted, thereby eliminating the need for manual disassembly and cleaning of the pre-filter, thereby increasing the service life of the pre-filter.

[0055] Please also refer to Figures 1 to 3 as well as Figures 7 to 9 In one embodiment of the present invention, the prefilter includes a housing having a water filtration chamber 101. Without loss of generality, the housing includes a valve head 20 and a filter bottle 10. The filter bottle 10 defines the water filtration chamber 101. The valve head 20 is provided with a water inlet 201 and a water outlet 202 communicating with the water filtration chamber 101. The filter bottle 10 is provided with a sewage outlet 102 on a side away from the valve head 20.

[0056] The water inlet 201 is connected to the water supply end of the water supply system, and the water outlet 202 is connected to the water consumption end of the water supply system, thereby filtering the raw water flowing from the water supply end to the water consumption end. It should be noted that the water supply end can be a tap, water tower, or well water, and the water consumption end can be a faucet, shower, or drinking water outlet, which is not specifically limited in this application.

[0057] The connection between the valve head 20 and the filter bottle 10 can be a threaded connection. For example, the valve head 20 may be provided with an externally threaded tube, and the mouth of the filter bottle 10 may be provided with an internal thread for threading the externally threaded tube. To reduce the production difficulty of the prefilter and the inspection requirements for the assembly results, as well as to reduce the material cost of the valve head 20, in this embodiment, the filter bottle 10 and the valve head 20 are connected by a fastener 1001. The fastener 1001 may be a bolt, wherein the bolt and the through hole threadably engage to lock the filter bottle 10 and the valve head 20. The fastener 1001 may also be a bolt and nut assembly, wherein the bolt passes through the through hole and is locked with the nut. The fastener 1001 may also be a pin and a pin shaft assembly, wherein the pin passes through the through hole and the pin shaft passes through the pin, thereby locking the filter bottle 10 and the valve head 20.

[0058] The valve head 20 includes a metal outer shell 21 and a plastic lining 22, both of which are connected. The water inlet 201 and the water outlet 202 are formed in the plastic lining 22. The metal outer shell 21 of the valve head 20 and the filter bottle 10 are connected by fasteners 1001. In this way, the water flowing through the pre-filter directly contacts the plastic lining 22 rather than the metal outer shell 21. This can prevent the water from being contaminated by metal elements precipitated from the metal outer shell 21, and can also make the pre-filter have good aesthetics and shell strength. In other embodiments, the valve head 20 can also be directly configured as a metal part.

[0059] The materials of the metal shell portion 21 and the plastic lining portion 22 are not specifically limited in this application. For example, the material of the metal shell portion 21 can be a copper alloy, such as brass, and the material of the plastic lining portion 22 can be PP (polypropylene) or PVC (polyvinyl chloride).

[0060] The pre-filter also includes a filter assembly 30 arranged in the water filter chamber 101. A corresponding filter structure is provided at the filter surface 301 of the filter assembly 30. The filter structure can be a stainless steel filter mesh or a PP cotton filter mesh. After the raw water (such as tap water or well water) flows into the water inlet 201 from the external water source, it can flow through the filter assembly 30. When the raw water flows through the filter surface 301, the large particles of impurities in the raw water can be filtered, thereby removing some precipitated impurities, rust, sand, mud, bacteria and other particulate impurities generated in the pipeline, which provides better protection for water purifiers, washing machines, showers, high-end faucets, downstream pipelines, etc., and reduces the risk of damage to these equipment due to blockage by impurities.

[0061] The pre-filter also includes an exoskeleton 50 and a cleaning structure 90 provided on the exoskeleton 50. The exoskeleton 50 is sleeved outside the filter assembly 30. The internal cleaning brush 910 of the cleaning structure 90 is protruding from the inner circumference of the exoskeleton 50. The exoskeleton 50 and the filter assembly 30 can rotate relative to each other. In this way, through the relative rotation of the exoskeleton 50 and the filter assembly 30, the internal cleaning brush 910 can scrub the circumference of the filter surface 301 in all directions to sweep away impurities attached to the filter surface 301, thereby avoiding clogging of the filter structure at the filter surface 301 and ensuring the filtering performance and service life of the filter assembly 30. Among them, the cleaning part 911 can be an elastic material such as silicone, rubber, or a flexible material such as a brush. In this way, the cleaning part 911 can have a certain degree of deformation ability to improve the adaptability of the cleaning part 911 to the filter surface 301, so that the cleaning part 911 and the filter surface 301 can be in close contact, and the cleaning part 911 can also better clean the filter surface 301 comprehensively.

[0062] The pre-filter is usually a "T"-shaped structure. The upper "horizontal" position corresponds to the valve head 20, and the left and right ends are the water inlet 201 and the water outlet 202 respectively. The lower "vertical" main body is the filter bottle 10, and the sewage outlet 102 is located on the lower side of the filter bottle 10.

[0063] It can be understood that the pre-filter has a filtering mode and a flushing mode. In the filtering mode of the pre-filter, the water inlet 201 and the water outlet 202 are both open, the sewage outlet 102 is closed, and the raw water flows from the water inlet 201 into the water filter chamber 101, and then in the process of flowing to the water outlet 202, it will flow through the filter assembly 30, and thus be filtered by the filter assembly 30, thereby filtering the raw water; in the flushing mode of the pre-filter, the water inlet 201 and the sewage outlet 102 are both open, and the water outlet 202 is closed. After the raw water flows from the water inlet 201 into the water filter chamber 101, it can entrain impurities in the water filter chamber 101, some of which are also the impurities swept off the filter assembly 30 by the internal cleaning brush 910, and the sewage is finally discharged from the pre-filter from the sewage outlet 102, thereby flushing the pre-filter.

[0064] Without loss of generality, the filter assembly 30 is fixedly installed in the water filter chamber 101, and the exoskeleton 50 is rotatably provided in the water filter chamber 101. The exoskeleton 50 can be rotated to disturb the water flow in the water filter chamber 101 to avoid the deposition of impurities, so that the water flow can better carry away the impurities to discharge them, thereby ensuring the cleanliness of the pre-filter and the filtering effect of the pre-filter.

[0065] In the technical solution of the present utility model, the filter surface 301 of the filter assembly 30 extends in the radial direction of the outer skeleton 50, while the cleaning portion 911 extends in the axial direction of the outer skeleton 50. The cleaning portion 911 and the filter surface 301 are correspondingly arranged so that the filter surface 301 can be cleaned by the cleaning portion 911. In this way, the side portion of the cleaning portion 911 distributed in the axial direction of the outer skeleton 50 can be arranged opposite to the filter surface 301. By scraping the filter surface 301 through the side portion, the filter surface 301 can be relatively fully covered, thereby increasing the cleaning area of ​​the filter surface 301 by the cleaning portion 911 and largely avoiding dead corners. As a result, the cleaning effect of the pre-filter on the filter assembly 30 can be improved, thereby increasing the service life of the pre-filter.

[0066] The technical solution of the utility model is applicable to both forward flushing pre-filters and back flushing filters. Figure 2 The cross section shown corresponds to a forward flushing pre-filter, and the purpose is to illustrate the relative positional relationship of related components, and is not to limit the scope of application of the technical solution of the present utility model.

[0067] In one embodiment, the cleaning portion 911 extends obliquely relative to the axial direction of the exoskeleton 50. In this way, the deformation ability of the cleaning portion 911 in the axial direction of the exoskeleton 50 can be improved. It can be understood that the cleaning portion 911 and the filter surface 301 will abut and fit in the axial direction of the exoskeleton 50. The cleaning portion 911 is easy to deform in the abutting and fitting direction between the two, which is conducive to reducing the pressure between the cleaning portion 911 and the filter surface 301. Therefore, when the exoskeleton 50 and the filter assembly 30 rotate relative to each other, the friction between the cleaning portion 911 and the filter surface 301 is reduced, so that the exoskeleton 50 can rotate smoothly relative to the filter assembly 30, so as to ensure that the cleaning portion 911 fully cleans the filter surface 301 in the circumferential direction.

[0068] Furthermore, the cleaning portion 911 extends obliquely along the circumference of the exoskeleton 50 relative to the axial direction of the exoskeleton 50. It will be appreciated that the oblique direction of the cleaning portion 911 facilitates its deformation. In this embodiment, the exoskeleton 50 rotates circumferentially, and the cleaning portion 911 easily deforms circumferentially of the exoskeleton 50, which further reduces the friction between the cleaning portion 911 and the filter surface 301, thereby ensuring smooth rotation of the exoskeleton 50. Furthermore, the cleaning portion 911 can more easily cover a larger area on the filter surface 301, thereby enhancing the cleaning effect of the cleaning portion 911 on the filter surface 301.

[0069] In one embodiment, a plurality of cleaning portions 911 and filter surfaces 301 are correspondingly distributed in the axial direction of the outer frame 50. In this way, a cleaning portion 911 can be used to clean a filter surface 301, thereby ensuring a cleaning effect on the filter assembly 30.

[0070] In one embodiment, see Figure 5 , there are multiple cleaning structures 90 distributed in the circumferential direction of the exoskeleton 50. Among them, it can be that each cleaning structure 90 is provided with the same number of cleaning parts 911 corresponding to the number of filter surfaces 301. In this way, each filter surface 301 will be cleaned by the cleaning parts 911 of multiple cleaning structures 90 distributed in the circumferential direction, which is beneficial to ensuring the cleaning effect of the filter assembly 30. Of course, it can also be that a cleaning part 911 is only provided for part of the filter surface 301 on a cleaning structure 90. By staggering the cleaning parts 911 on multiple cleaning structures 90 distributed in the circumferential direction, each filter surface 301 is provided with at least one cleaning part 911. In this way, under the premise of ensuring the coverage of the filter surface 301 by the cleaning structure 90, the friction between the cleaning part 911 and the filter surface 301 can also be dispersed in the circumferential direction, which is beneficial to ensuring the stability and smoothness of the rotation of the exoskeleton 50.

[0071] The plurality of cleaning portions 911 are arranged along the same circumferential direction of the exoskeleton 50 and are tilted relative to the axial direction of the exoskeleton 50. This allows the tilt of the cleaning portions 911 to be conveniently adjusted based on the rotational direction of the exoskeleton 50, thereby reducing friction between the cleaning portions 911 and the cleaning surface and ensuring smooth rotation of the exoskeleton 50. For example, if the exoskeleton 50 needs to rotate clockwise, each cleaning portion 911 is tilted counterclockwise.

[0072] In one embodiment, see Figure 9 The side portion of the cleaning portion 911 distributed in the axial direction of the outer skeleton 50 is inclined, and the filter surface 301 is in a corresponding annular cone shape. The annular cone-shaped filter surface 301 allows the space of the water filter chamber 101 to be fully utilized, increasing the water flow area of ​​the filter component 30 and the area that can intercept impurities, thereby improving the filtering effect of the filter component 30. The side portion of the cleaning portion 911 used to clean the filter surface 301 is set to an inclined shape corresponding to the filter surface 301, which can improve the fit between the cleaning portion 911 and the filter surface 301, and is conducive to improving the cleaning force of the cleaning portion 911 on the filter surface 301, thereby ensuring the cleaning effect of the filter component 30 and ensuring the life of the pre-filter.

[0073] In one embodiment, see Figure 3 The filter assembly 30 includes multiple filter modules 300. Each filter module 300 has two axially opposed filter surfaces 301. It is understood that a water flow cavity is formed between the two filter surfaces 301 of each filter module 300. The water flow cavities of the multiple filter modules 300 are interconnected and ultimately connected to the water outlet 202. During filtration, water in the water filter cavity 101 can flow through the filter surface 301 into the water flow cavity and ultimately flow to the water outlet 202.

[0074] The two filter surfaces 301 of a filter module 300 are arranged to gradually expand in opposite directions, ensuring that a sufficiently large water flow cavity is formed within the filter module 300 to guarantee the water flow capacity of the filter assembly 30, thereby ensuring that the filter assembly 30 can withstand a sufficiently large flow rate. Providing multiple filter modules 300 with filter surfaces 301 arranged in this manner further utilizes the space within the water filter cavity 101, increases the number of filter surfaces 301, and effectively enhances the filtration capacity of the filter assembly 30.

[0075] In one embodiment, see Figure 7 and Figure 8 For multiple cleaning parts 911 located at the same axial position, an acute angle is formed between two adjacent cleaning parts 911. In this way, the spatial arrangement of the multiple cleaning parts 911 can be facilitated, and at the same time, it is beneficial to ensure that the cleaning parts 911 cover the filter surface 301 in the axial direction. Figure 10 The angle α between two adjacent cleaning portions 911 is preferably 60 to 80 degrees. That is, the angle α between two adjacent cleaning portions 911 is greater than or equal to 60 degrees and less than or equal to 80 degrees. Of course, in other embodiments, the angle between two adjacent cleaning portions 911 can also be adjusted to a range less than 60 degrees or greater than 80 degrees.

[0076] In one embodiment, see Figure 3 The inner cleaning brush 910 further includes a base portion 912, which is protruding from the inner circumference of the outer frame 50, and the cleaning portion 911 is connected to the outer circumference of the base portion 912. In this way, the base portion 912 can provide support for the cleaning portion 911 to enhance the structural strength of the inner cleaning brush 910, and the cleaning portion 911 can be connected to the outer frame 50 through the base portion 912, without extending to the inner circumference of the outer frame 50 to connect with the outer frame 50. The cleaning portion 911 only needs to maintain axial coverage of the filter surface 301. Of course, in other embodiments, the cleaning portion 911 can also be directly connected to the outer frame 50.

[0077] In one embodiment, one base portion 912 is provided with two cleaning portions 911 extending in opposite directions in the axial direction of the exoskeleton 50. Thus, the two cleaning portions 911 provided on one base portion 912 can clean both filter surfaces 301, simplifying the structure of the cleaning structure 90. Of course, in other embodiments, the base portions 912 and cleaning portions 911 may be provided in a one-to-one correspondence.

[0078] Furthermore, the two filter surfaces 301 of the same filter module 300 taper in opposing directions. A base portion 912 is provided at the connection between the two filter modules 300. Two cleaning portions 911 on the base portion 912 extend in opposing directions relative to the base portion 912 in the axial direction of the exoskeleton 50. This creates a space at the connection between adjacent filter modules 300 for accommodating the internal cleaning brush 910. The two cleaning portions 911 on the base portion 912 can clean the filter surfaces 301 on adjacent sides of the two filter modules 300, respectively. This improves the compactness of the pre-filter's internal structure, thereby increasing the utilization of the internal space of the water filter chamber 101 and facilitating a miniaturized pre-filter design.

[0079] In this embodiment, the internal cleaning brush 910 has two types of structures. The internal cleaning brush 910 corresponding to the connection between the two filter modules 300 has two cleaning portions 911 extending in opposite directions in the axial direction of the outer skeleton 50 on a base portion 912. The internal cleaning brush 910 corresponding to the end of the filter assembly 30 only needs to have one cleaning portion 911 on the base portion 912. The structure of the internal cleaning brush 910 can be the structure of the aforementioned internal cleaning brush 910 split in half. Without loss of generality, in the former type of internal cleaning brush 910, the base portion 912 can be cylindrical, with the two cleaning portions 911 distributed on both sides of the axis of the cylinder. In the latter type of internal cleaning brush 910, the base portion 912 is configured as half a cylinder, and the cleaning portions 911 are connected to the circumference of the cylinder.

[0080] In one embodiment, see Figure 7 and Figure 8 The cleaning portion 911 is configured as a sheet structure. In this way, the cleaning portion 911 is relatively thin and has good deformation capability. When the cleaning portion 911 contacts the filter surface 301, it does not generate too much resistance to the filter surface 301, thus avoiding the situation where the filter surface 301 is stuck and the outer frame 50 cannot rotate. Figure 10 , the thickness d of the cleaning portion 911 is 0.5 mm to 1 mm. That is, the thickness d of the cleaning portion 911 is greater than or equal to 0.5 mm and less than or equal to 1 mm. In this way, the cleaning portion 911 can have an appropriate thickness, which can not only meet the requirements for deformation ability, but also ensure that the cleaning portion 911 has sufficient structural strength and ensure the connection stability between the cleaning portion 911 and the base portion 912 or other related structures. Of course, in other embodiments, under the premise of meeting the requirements for deformation ability and structural strength, the thickness of the cleaning portion 911 can also be set to a range of less than 0.5 mm or greater than 1 mm.

[0081] In one embodiment, the cleaning portion 911 and the filter surface 301 are in interference fit. This allows the cleaning portion 911 to more deeply clean impurities on the filter surface 301, thereby enhancing the cleaning power of the cleaning structure 90 on the filter assembly 30, ensuring the filtering effect of the filter assembly 30 and increasing the service life of the pre-filter. Specifically, the interference fit between the cleaning portion 911 and the filter surface 301 is between 0.8 mm and 1.2 mm. That is, the interference fit between the cleaning portion 911 and the filter surface 301 is greater than or equal to 0.8 mm and less than or equal to 1.2 mm. This allows the degree of contact between the cleaning portion 911 and the filter surface 301 to be within an appropriate range. While ensuring the cleaning power of the cleaning portion 911 on the filter surface 301, the friction between the cleaning portion 911 and the filter surface 301 will not be excessive, thereby avoiding excessive interference with the rotation of the exoskeleton 50 and reducing wear on the cleaning portion 911. Of course, in other embodiments, the interference between the cleaning portion 911 and the filter surface 301 can also be adjusted to a range less than 0.8 mm or a range greater than 1.2 mm according to needs.

[0082] In one embodiment, the cleaning structure 90 is detachably mounted to the exoskeleton 50. This allows for easy removal of the cleaning structure 90 and replacement of a new cleaning structure 90 when the cleaning portion 911 becomes excessively worn and no longer effectively cleans the filter assembly 30. In other embodiments, only the cleaning portion 911 may be removable and replaceable, thereby reducing pre-filter maintenance costs.

[0083] In one embodiment, see Figure 6 The cleaning structure 90 also includes a mounting portion 930, on which a plurality of internal cleaning brushes 910 are provided. The exoskeleton 50 is correspondingly provided with a mounting groove, and the mounting portion 930 is snapped into the mounting groove. It can be understood that the mounting portion 930 extends along the axial direction of the exoskeleton 50, and the plurality of internal cleaning brushes 910 are also distributed in the axial direction of the exoskeleton 50. In this way, a plurality of internal cleaning brushes 910 can be installed on the exoskeleton 50 through a mounting portion 930, and the mounting portion 930 and the exoskeleton 50 can be disassembled and assembled to replace the plurality of internal cleaning brushes 910, which can improve the convenience of maintenance of the cleaning structure 90. Of course, in other embodiments, the internal cleaning brush 910 can also be directly connected to the exoskeleton 50.

[0084] In one embodiment, see Figure 5, some corners of the mounting portion 930 are configured as chamfered shapes, and the corresponding corners of the mounting slot are configured as the same chamfered shapes. Of the corners of the mounting portion 930, only some are configured as chamfered shapes, and the corners of the mounting slot are configured with corresponding chamfered shapes. This facilitates the matching of the mounting portion 930 and the corresponding corners of the mounting slot, and plays a foolproof role during the assembly process of the cleaning structure 90 and the exoskeleton 50, preventing the cleaning structure 90 from being installed upside down. Of course, in other embodiments, foolproofing can also be achieved through other means, such as providing a directional arrow on the outer side of the mounting portion 930.

[0085] It should be noted that the multiple indicated in this solution should be understood as greater than or equal to two unless otherwise specified.

[0086] The present invention also provides a water system including a prefilter. The specific structure of the prefilter is similar to that of the above-described embodiments. Since the present water system utilizes all of the technical solutions of all of the above-described embodiments, it at least possesses all of the beneficial effects of the technical solutions of the above-described embodiments, and therefore will not be further detailed here. The water system includes at least the relevant components from the prefilter to the water supply terminal. For example, the water system may include household appliances such as a water heater, a dishwasher, and a water dispenser, as well as accessories such as water pipes for household water supply.

[0087] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pre-filter, characterized in that: include: The housing has a water filtering cavity; A filter assembly is arranged in the water filter cavity; as well as An exoskeleton is disposed in the water filter cavity and sleeved on the outer periphery of the filter assembly, wherein the exoskeleton and the filter assembly are relatively rotatable, and the exoskeleton is equipped with a cleaning structure, wherein the cleaning structure includes an inner cleaning brush protruding from the inner periphery of the exoskeleton, and the inner cleaning brush includes a cleaning portion; The filter assembly has a filter surface extending in the radial direction of the outer skeleton, the cleaning portion extends in the axial direction of the outer skeleton, the cleaning portion is arranged corresponding to the filter surface, and the cleaning portion is used to clean the filter surface.

2. The prefilter according to claim 1, wherein The cleaning portion extends obliquely relative to the axial direction of the outer frame.

3. The prefilter according to claim 1, wherein: The cleaning portion extends along the circumferential direction of the outer frame and is inclined relative to the axial direction of the outer frame.

4. The prefilter according to claim 1, wherein The inner cleaning brush further comprises a base portion, the base portion is protrudingly arranged on the inner circumference of the outer frame, and the cleaning portion is connected to the outer circumference of the base portion.

5. The pre-filter according to claim 4, characterized in that One base portion is correspondingly provided with two cleaning portions extending in opposite directions in the axial direction of the outer frame.

6. The prefilter according to claim 1, wherein: A plurality of the cleaning parts and the filtering surfaces are correspondingly distributed in the axial direction of the outer skeleton.

7. The prefilter according to claim 6, wherein: The plurality of cleaning portions are arranged along the same circumferential direction of the outer frame and are inclined relative to the axial direction of the outer frame.

8. The pre-filter according to claim 6, wherein: The filter assembly includes a plurality of filter modules, and one filter module is formed with two filter surfaces that are opposite to each other in the axial direction.

9. The prefilter according to claim 8, characterized in that Two adjacent cleaning parts are arranged at an acute angle.

10. The pre-filter according to claim 9, characterized in that The included angle between two adjacent cleaning parts is 60 degrees to 80 degrees.

11. The prefilter according to claim 1, wherein The side portion of the cleaning portion distributed in the axial direction of the outer skeleton is inclined, and the filtering surface is in a corresponding annular cone shape.

12. The pre-filter according to claim 11, characterized in that The filter assembly includes a plurality of filter modules distributed along the axial direction, and one of the filter modules is provided with two filter surfaces that are tapered in opposite directions. The inner cleaning brush also includes a base portion, which is protruded from the inner circumference of the outer skeleton and is arranged corresponding to the connection between the two filter modules. The outer circumference of one of the base portions is provided with two cleaning portions whose extension directions in the axial direction of the outer skeleton are opposite to each other.

13. The pre-filter according to claim 1, wherein: The cleaning portion is configured as a sheet-like structure; And / or, the cleaning portion has a thickness of 0.5 mm to 1 mm.

14. The pre-filter according to claim 1, wherein The cleaning portion and the filter surface are in interference contact.

15. The pre-filter according to claim 14, characterized in that The interference between the cleaning portion and the filtering surface is 0.8 mm to 1.2 mm.

16. The pre-filter according to claim 1, wherein The cleaning structure is detachably mounted on the outer frame.

17. The pre-filter according to claim 16, wherein: The cleaning structure further comprises a mounting portion, on which a plurality of the inner cleaning brushes are provided, and the outer frame is correspondingly provided with mounting grooves, and the mounting portion is clamped in the mounting grooves.

18. The pre-filter according to claim 17, wherein: Part of the corners of the mounting portion are configured as chamfered shapes, and the corresponding corners of the mounting groove are configured as the same chamfered shapes.

19. The pre-filter according to claim 1, wherein: A plurality of cleaning structures are distributed in the circumferential direction of the outer skeleton.

20. A water system, characterized in that: The pre-filter comprises the pre-filter according to any one of claims 1 to 17.

Images