Pre-filter and water system

Abstract

The utility model discloses a pre-filter and a water consuming system, and relates to the technical field of filters, the pre-filter comprises a shell, a filtering assembly and an outer framework, the shell is provided with a water filtering cavity; the filtering assembly is arranged in the water filtering cavity; the outer framework is arranged in the water filtering cavity, the outer framework is rotatably arranged on the periphery of the filtering assembly in a sleeving mode, an inner cleaning structure is installed on the inner side of the outer framework and comprises an inner cleaning brush arranged in a protruding mode in the first direction, and a cleaning part is arranged on the inner cleaning brush; the cleaning part is at least located on the side portion, distributed on the axial direction of the filtering assembly, of the inner cleaning brush, the filtering assembly is provided with a filtering face extending in the radial direction, and the cleaning part is used for cleaning the filtering face; according to the technical scheme provided by the utility model, the cleaning effect of the pre-filter on the filtering component can be improved, and the service life of the pre-filter is prolonged.

Description

Technical Field

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

[0002] As people's living standards continue to improve, their demands for daily water use are also increasing. Due to long-term disrepair and aging of tap water pipes, large particles harmful to the human body, such as silt, rust, and bloodworms, are present in the water, seriously affecting residents' water safety. Therefore, a pre-filter, equipped with a filter assembly and other structures, is required to filter out large particles before 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 provided in the water filter cavity and is rotatably sleeved on the outer periphery of the filter assembly. An internal cleaning structure is installed on the inner side of the exoskeleton. The internal cleaning structure includes an internal cleaning brush protruding along a first direction, and a cleaning portion is provided on the internal cleaning brush. The cleaning portion is at least located on the side of the internal cleaning brush distributed in the axial direction of the filter assembly. The filter assembly has a filter surface extending radially, and the cleaning portion is used to clean the filter surface.

[0009] In one embodiment, the width of the cleaning portion along the first direction is greater than or equal to 4 mm and less than or equal to 6 mm; and / or,

[0010] The thickness of the cleaning portion is greater than or equal to 0.3 mm and less than or equal to 0.7 mm.

[0011] In one embodiment, the cleaning portion is gradually expanded in a direction away from the filter assembly.

[0012] In one embodiment, the cleaning portion has a cleaning surface facing the filter assembly, and an angle between the cleaning surface and the first direction is greater than or equal to 10° and less than or equal to 12°.

[0013] In one embodiment, the angle between the cleaning surface and the first direction is 10.8°.

[0014] In one embodiment, the cleaning portion has a cleaning surface facing the filter assembly, and the cleaning surface is arranged in an interference fit with the surface of the filter assembly; and / or,

[0015] The cleaning portion partially extends into the filter assembly, and a depth of the cleaning portion extending into the filter assembly is greater than or equal to 0.2 mm and less than or equal to 0.4 mm.

[0016] In one embodiment, the cleaning portion includes a plurality of brush bars spaced apart along the first direction.

[0017] In one embodiment, the interval between two adjacent brush strips is greater than or equal to 0.2 mm and less than or equal to 0.4 mm; and / or,

[0018] The thickness of the brush strip along the first direction is greater than or equal to 0.8 mm and less than or equal to 1.2 mm.

[0019] In one embodiment, the cleaning portion is configured as a brush extending along the first direction.

[0020] In one embodiment, the corners of the brush sheet are rounded, and the radius of the rounded corners is greater than or equal to 0.2 mm and less than or equal to 0.4 mm.

[0021] In one embodiment, the cleaning portion is configured as a flexible cleaning portion; and / or the cleaning portion is made of a flexible material.

[0022] In one embodiment, the inner cleaning brush further comprises a base portion protruding from the inner circumference of the outer frame along the first direction, and the cleaning portion is provided on a side of the base portion facing one end of the filter assembly.

[0023] In one embodiment, at least a portion of the cleaning portion is tapered in a direction away from the base portion.

[0024] In one embodiment, the diameter of the base portion is greater than or equal to 3 mm and less than or equal to 5 mm.

[0025] In one embodiment, the internal cleaning structure also includes a mounting portion, which is mounted on the inner side of the outer skeleton and extends axially along the outer skeleton. A plurality of internal cleaning brushes are arranged at intervals along the extension direction of the mounting portion, and reinforcing ribs are provided between the base portion and the mounting portion.

[0026] In one embodiment, the thickness of the reinforcing rib is greater than or equal to 1.5 mm and less than or equal to 3 mm.

[0027] In one embodiment, the filter assembly includes a plurality of filter modules connected in sequence along the axial direction of the outer skeleton, and the plurality of inner cleaning brushes include a first inner cleaning brush and / or a second inner cleaning brush, the first inner cleaning brush is provided with the cleaning portion on a side facing the filter assembly, and the second inner cleaning brushes are distributed on two opposite sides in the axial direction of the filter assembly. In one embodiment, a plurality of the inner cleaning structures are provided at intervals along the inner circumference of the outer skeleton; or,

[0028] A plurality of installation positions are arranged opposite to each other on the inner side of the outer frame, and at least one inner cleaning structure is installed on each of the installation positions.

[0029] The utility model also provides a water use system, comprising the pre-filter as described above.

[0030] The technical solution of the present invention is to set a water filter chamber in the shell, and the filter assembly and the exoskeleton are both arranged in the water filter chamber. The exoskeleton is rotatably sleeved on the outer periphery of the filter assembly, and an internal cleaning structure is installed on the inner side of the exoskeleton. The internal cleaning structure includes an internal cleaning brush, and the internal cleaning brush is provided with a cleaning part, and the cleaning part is at least located on the side of the internal cleaning brush distributed in the axial direction of the filter assembly. The filter assembly has a radially extending filter surface, that is, the cleaning part is arranged on the side of the internal cleaning brush and is parallel to the axial direction of the filter assembly, so that the cleaning part is arranged opposite to the filter surface, so that the cleaning part can directly clean the radially extending filter surface of the filter assembly, thereby reducing sanitary dead corners and increasing the cleaning area of ​​the filter assembly by the internal cleaning structure. 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 This is a schematic diagram of the assembly structure of the exoskeleton and filter assembly in an embodiment of the pre-filter provided by the present invention;

[0033] Figure 2 for Figure 1 Schematic diagram of the structure of the exoskeleton;

[0034] Figure 3 for Figure 1 A schematic structural diagram of the inner and outer cleaning structure from one angle;

[0035] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0036] Figure 5 for Figure 1 A schematic structural diagram of the inner and outer cleaning structure from another angle;

[0037] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0038] Figure 7 This is a structural schematic diagram from one angle of the inner cleaning structure of another embodiment of the pre-filter provided by the present invention;

[0039] Figure 8 for Figure 7 A partial enlarged view of point C in the middle;

[0040] Figure 9 for Figure 7 A schematic structural diagram of the inner and outer cleaning structure from another angle;

[0041] Figure 10 for Figure 9 A partial enlarged view of point D in the middle.

[0042] Description of Figure Numbers:

[0043] 1. Exoskeleton; 101. Mounting position; 11. Internal cleaning brush; 111. Cleaning part; 112. Base part; 113. Brush strip; 114. Brush sheet; 115. Mounting part; 116. First internal cleaning brush; 117. Second internal cleaning brush; 118. Reinforcement rib; 2. Filter assembly; 21. Filter module; 22. Filter surface.

[0044] 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

[0045] 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.

[0046] 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.

[0047] 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.

[0048] The utility model provides a pre-filter, the internal components of which can regularly clean the filter assembly 2 therein to discharge the large particulate matter previously intercepted, thereby eliminating the need to manually disassemble and clean the pre-filter, thereby increasing the service life of the pre-filter.

[0049] Water systems, such as whole-house water purification systems, typically feature a pre-filter to filter out 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. It is a physical filter that primarily intercepts large particles larger than 40 microns, ensuring back-end water safety.

[0050] See also Figure 1 and Figure 2 In one embodiment of the present invention, the pre-filter includes:

[0051] The housing has a water filtering cavity;

[0052] The filter assembly 2 is disposed in the water filter chamber; and

[0053] The exoskeleton 1 is arranged in the water filter cavity and can be rotatably mounted on the outer periphery of the filter assembly 2. An internal cleaning structure is installed on the inner side of the exoskeleton 1. The internal cleaning structure includes an internal cleaning brush 11 protruding along a first direction, and the internal cleaning brush 11 is provided with a cleaning portion 111. The cleaning portion 111 is at least located on the side of the internal cleaning brush 11 distributed in the axial direction of the filter assembly 2. The filter assembly 2 has a filter surface 22 extending radially, and the cleaning portion 111 is used to clean the filter surface 22.

[0054] Specifically, a water filter chamber is provided in the housing, and the filter assembly 2 and the exoskeleton 1 are both provided in the water filter chamber. The filter assembly 2 is used to filter the water flow in the water filter chamber, and the filter assembly 2 is fixed in the water filter chamber. The exoskeleton 1 is sleeved on the periphery of the filter assembly 2 to support the internal structure of the pre-filter and protect the filter assembly 2 and other structures from external pressure or impact. The exoskeleton 1 can rotate in the water filter chamber, that is, the exoskeleton 1 can rotate relative to the filter assembly 2. An internal cleaning structure is installed on the inner side of the exoskeleton 1. The internal cleaning structure can clean the filter assembly 2, thereby cleaning the filter assembly 2, reducing the possibility of impurities adhering to the surface of the filter assembly 2 and causing the filter assembly 2 to become clogged, thereby ensuring the filtering effect of the filter assembly 2.

[0055] In this embodiment, the filter component 2 has a filter surface 22 extending radially, that is, the filter surface 22 of the filter component 2 is set at an angle to the axial direction of the filter component 2, while the cleaning portion 111 of the internal cleaning brush 11 in the prior art is usually provided at the end of the internal cleaning brush 11 away from the outer skeleton 1, and protrudes toward the inner side of the outer skeleton 1, that is, the extension direction of the cleaning portion 111 is roughly parallel to or has a small angle with the filter surface 22 of the filter component 2 in this scheme, resulting in limited cleaning effect of the cleaning portion 111 on the filter surface 22, resulting in sanitary dead corners on the surface of the filter component 2 that are difficult to clean. Long-term adhesion of impurities not only affects the filtering effect of the filter component 2, but also easily causes bacterial growth.

[0056] Therefore, an internal cleaning brush 11 is provided, which protrudes in a first direction, that is, in a direction close to the filter assembly 2, and a cleaning portion 111 is provided on the internal cleaning brush 11, and the cleaning portion 111 is located on the side of the internal cleaning brush 11 distributed in the axial direction of the filter assembly 2, that is, the cleaning portion 111 is provided on the side of the internal cleaning brush 11 and is parallel to the axial direction of the filter assembly 2, so that the cleaning portion 111 is arranged opposite to the filter surface 22, so that the cleaning portion 111 can directly clean the radially extending filter surface 22 of the filter assembly 2, thereby reducing sanitary dead corners and increasing the cleaning area of ​​the filter assembly 2 by the internal cleaning structure.

[0057] It should be noted that the filter assembly 2 may have only a radially extending filter surface 22, without an axially extending filter surface 22, or may have both a radially extending filter surface 22 and an axially extending filter surface 22. Accordingly, the internal cleaning structure may include only an internal cleaning brush 11 with a cleaning portion 111 located on the axial side of the filter assembly 2, or may include both an internal cleaning brush 11 with a cleaning portion 111 located on the axial side of the filter assembly 2, or an internal cleaning brush 11 with a cleaning portion 111 located on the axial end of the filter assembly 2. The filter surface 22 extending radially of the filter assembly 2 may not be a flat surface, but may be a curved surface that is concave inward or outward, or may be formed by multiple folds. The filter surface 22 may not be completely parallel to the radial direction of the filter assembly 2, but may be at least at a certain angle to the radial direction of the filter assembly 2. The first direction may be parallel to the radial direction of the filter assembly 2, in which case the internal cleaning brush 11 is convex toward the axis of the filter assembly 2. The first direction may also be arranged at a certain angle relative to the radial direction of the filter assembly 2. Designers can make corresponding settings based on the specific structure of the filter component 2.

[0058] The cleaning portion 111 can be integrally formed with the inner cleaning brush 11, thereby facilitating the assembly of the inner cleaning brush 11. The inner cleaning brush 11 can also be integrally formed with the outer frame 1, or fastened to the outer frame 1 by snapping, bonding, or fasteners.

[0059] In one embodiment, the cleaning portion 111 is configured as a flexible cleaning portion 111, thereby facilitating the adaptive cooperation between the cleaning portion 111 and the filter surface 22, thereby improving the cleaning effect of the filter surface 22. The cleaning portion 111 can be made of a flexible material, such as silicone, rubber, or flexible plastic.

[0060] See also Figures 1 to 10 In an embodiment of the present invention, the inner cleaning brush 11 further comprises a base portion 112 protruding from the inner circumference of the outer frame 1 along a first direction, and the cleaning portion 111 is disposed on the side of the base portion 112 at one end facing the filter assembly 2. Specifically, the base portion 112 protrudes from the inner circumference of the outer frame 1, that is, the base portion 112 extends inwardly of the outer frame 1. The cleaning portion 111 is disposed on the side of the base portion 112 at one end facing the filter assembly 2, that is, the cleaning portion 111 is only disposed on the axial side of the base portion 112, thereby reducing unnecessary structural redundancy and helping to reduce the structural dimensions of the inner cleaning brush 11, thereby facilitating the installation of the inner cleaning brush 11.

[0061] See also Figure 6 and Figure 10In an embodiment of the present invention, the width of the cleaning portion 111 along the first direction is greater than or equal to 4 mm and less than or equal to 6 mm. Specifically, assuming that the width of the cleaning portion 111 along the first direction is D1, if the width D1 of the cleaning portion 111 along the first direction is greater than 6 mm, the width of the cleaning portion 111 along the first direction is too large and may exceed the width of the filter assembly 2 along the first direction, thereby causing unnecessary cost waste; if the width D1 of the cleaning portion 111 along the first direction is less than 4 mm, the width of the cleaning portion 111 along the first direction is too small and may be far less than the width of the filter assembly 2 along the first direction, thereby causing part of the filter surface 22 of the filter assembly 2 to be unable to be cleaned. Therefore, the width of the cleaning portion 111 along the first direction is set to be greater than or equal to 4 mm and less than or equal to 6 mm, thereby ensuring the cleaning effect of the cleaning portion 111 on the filter assembly 2 and reducing unnecessary cost waste. Preferably, the width of the cleaning portion 111 along the first direction is equal to the width of the filter assembly 2 along the first direction; or the width of the cleaning portion 111 along the first direction is slightly larger or slightly smaller than the width of the filter assembly 2 along the first direction, for example, the difference between the width of the cleaning portion 111 along the first direction and the width of the filter assembly 2 along the first direction is less than or equal to 1 mm. Specifically, the width D1 of the cleaning portion 111 along the first direction can be 4 mm, 4.2 mm, 4.5 mm, 4.7 mm, 5 mm, 5.2 mm, 5.5 mm, 5.7 mm, 6 mm, etc.

[0062] See also Figure 4 and Figure 8 In another embodiment of the present invention, the thickness of the cleaning portion 111 is greater than or equal to 0.3 mm and less than or equal to 0.7 mm. Specifically, the thickness of the cleaning portion 111 is H1, that is, the circumferential coverage thickness of the cleaning surface on the base portion 112. If the thickness H1 of the cleaning portion 111 is greater than 0.7 mm, the thickness of the cleaning portion 111 along the circumference of the base portion 112 is too large, the overall hardness of the cleaning portion 111 increases, and the surface of the cleaning portion 111 may be damaged when the cleaning portion 111 rotates relative to the filter assembly 2, or the cleaning portion 111 may be detached, or the exoskeleton 1 and the filter assembly 2 may be stuck, affecting the service life of the pre-filter; if the thickness H1 of the cleaning portion 111 is less than 0.3 mm, the thickness of the cleaning portion 111 along the circumference of the base portion 112 is too small, the overall hardness of the cleaning portion 111 is reduced, and the friction force of the cleaning portion 111 relative to the filter surface 22 may be insufficient, resulting in inadequate cleaning of the filter surface 22, affecting the cleaning effect of the pre-filter. Therefore, the thickness of the cleaning portion 111 along the circumference of the base portion 112 is greater than or equal to 0.3 mm and less than or equal to 0.7 mm, which can ensure both the cleaning effect of the filter assembly 2 and the service life of the pre-filter. Specifically, the thickness H1 of the cleaning portion 111 can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, etc.

[0063] See also Figure 6 and Figure 10 In order to ensure the cleaning effect of the cleaning portion 111, in an embodiment of the present utility model, the cleaning portion 111 is gradually expanded in the direction away from the filter assembly 2. Specifically, that is, in the direction away from the filter assembly 2, the length of the cleaning portion 111 becomes larger. Assuming that the length of the cleaning portion 111 is L1, if the filter surface 22 is an inclined surface extending along its radial direction, the shape of the cleaning portion 111 is just adapted to the filter surface 22, ensuring the cleaning effect of the cleaning surface. If the filter surface 22 is a plane, the farther away from the central axis of the filter assembly 2, the greater the friction force it is subjected to, thereby improving the cleaning effect at the outer edge corner of the filter assembly 2 and reducing sanitary dead corners. The outer contour of the side of the cleaning portion 111 of the cleaning assembly away from the base portion 112 can be linear, arc-shaped or stepped.

[0064] Furthermore, the cleaning portion 111 has a cleaning surface facing the filter assembly, and the angle between the cleaning surface and the first direction is greater than or equal to 10° and less than or equal to 12°. Specifically, the cleaning surface is also the end surface of the cleaning portion 111 away from the base portion 112, and the first direction is also the axial direction of the base portion. Therefore, the angle between the cleaning surface and the first direction, that is, the angle between the end surface of the cleaning portion 111 away from the base portion 112 and the axis of the base portion 112, is set to α. If the angle between the cleaning surface and the first direction is greater than 12°, the difference between the length of the side of the cleaning portion 111 close to the filter assembly 2 and the length of the side of the cleaning portion 111 close to the filter assembly 2 is too large, which may cause uneven cleaning of the filter assembly 2. If the angle between the cleaning surface and the first direction is less than 10°, the difference between the length of the side of the cleaning portion 111 close to the filter assembly 2 and the length of the side of the cleaning portion 111 close to the filter assembly 2 is too small, which is not conducive to the cleaning effect at the outer edge corner of the filter assembly 2. Specifically, the angle α between the cleaning surface and the first direction can be 10°, 10.3°, 10.5°, 10.8°, 11°, 11.3°, 11.5°, 11.8°, 12°, etc. Preferably, the angle α between the cleaning surface and the first direction is 10.8°.

[0065] Among them, if the end face of the cleaning part 111 of the cleaning component away from the base part 112 is an arc surface or a stepped surface, the straight line formed by the free end of the cleaning part 111 on the side close to the filter component 2 (the end of the cleaning part 111 away from the base part 112) and the free end of the cleaning part 111 on the side close to the filter component 2 (the end of the cleaning part 111 away from the base part 112) is used as the approximate surface of the end face of the cleaning part 111 on the side away from the base part 112, which is used to measure the relevant angle.

[0066] To further ensure the cleaning effect of the filter assembly 2, in the embodiment of the present utility model, please refer to Figure 2 、 Figure 4 and Figure 8 At least a portion of the cleaning portion 111 is tapered in a direction away from the base portion 112, that is, the thickness H1 of at least a portion of the cleaning portion 111 gradually decreases in a direction away from the base portion 112. This ensures that the cleaning portion 111 exerts a certain amount of friction on the filter assembly 2, thereby ensuring the cleaning effect, while not affecting the relative movement of the cleaning portion 111 and the filter assembly 2. Furthermore, the tapered shape of the cleaning portion 111 in a direction away from the base portion 112 can also make the thickness of the side of the cleaning portion 111 connected to the base portion 112 greater than the thickness of the side of the cleaning portion 111 closer to the cleaning surface, thereby improving the stability of the connection between the cleaning portion 111 and the base portion 112. Furthermore, the lower thickness of the cleaning portion 111 closer to the filter assembly 2 helps the free end of the cleaning portion 111 extend into the gaps in the filter screen formed by the filter assembly 2, thereby improving the cleaning effect.

[0067] To further ensure the cleaning effect of the filter assembly 2, in the embodiment of the present utility model, please refer to Figure 1 and Figure 2 The cleaning surface is arranged in an interference fit with the surface of the filter component 2, so that the cleaning part 111 has a certain friction force on the filter component 2, thereby ensuring the cleaning effect without affecting the relative movement of the cleaning part 111 and the filter component 2.

[0068] In another embodiment of the present invention, the cleaning portion 111 partially extends into the filter assembly 2, and the depth of the cleaning portion 111 extending into the filter assembly 2 is greater than or equal to 0.2 mm and less than or equal to 0.4 mm. Specifically, the cleaning portion 111 extends into the filter assembly 2 on the side away from the base portion 112, thereby improving the cleaning effect. If the depth of the cleaning portion 111 extending into the filter assembly 2 is greater than 0.4 mm, the friction of the cleaning portion 111 relative to the filter assembly 2 is too large, affecting the service life of the pre-filter. If the depth of the cleaning portion 111 extending into the filter assembly 2 is less than 0.2 mm, the friction of the cleaning portion 111 relative to the filter assembly 2 is too large, which may result in insufficient friction between the cleaning portion 111 and the filter surface 22, resulting in inadequate cleaning of the filter surface 22, affecting the cleaning effect of the pre-filter. Specifically, the depth of the cleaning portion 111 extending into the filter assembly 2 can be 0.2 mm, 0.22 mm, 0.25 mm, 0.27 mm, 0.3 mm, 0.32 mm, 0.35 mm, 0.37 mm, 0.4 mm, etc.

[0069] See also Figures 1 to 6In an embodiment of the present invention, the cleaning portion 111 includes a plurality of brush strips 113 spaced apart along a first direction. Specifically, the plurality of brush strips 113 are arranged along the first direction to form a cleaning portion 111, thereby facilitating adjustment of the width D1 of the cleaning portion 111.

[0070] Specifically, the interval between two adjacent brush strips 113 is greater than or equal to 0.2 mm and less than or equal to 0.4 mm. The thickness of the brush strip 113 along the first direction is greater than or equal to 0.8 mm and less than or equal to 1.2 mm.

[0071] Specifically, assuming the interval between two adjacent brush strips 113 is h1, if the interval between two adjacent brush strips 113 is greater than 0.4 mm, the interval between the two adjacent brush strips 113 is too large, resulting in a low arrangement density of the brush strips 113, which affects the cleaning effect of the filter assembly 2. If the interval between two adjacent brush strips 113 is less than 0.2 mm, the interval between the two adjacent brush strips 113 is too small, resulting in a high arrangement density of the brush strips 113, which affects the movement between the adjacent brush strips 113 and also affects the cleaning effect of the filter assembly 2. Specifically, the interval between two adjacent brush strips 113 can be 0.2 mm, 0.22 mm, 0.25 mm, 0.27 mm, 0.3 mm, 0.32 mm, 0.35 mm, 0.37 mm, 0.4 mm, etc.

[0072] Assuming that the thickness of the brush strip 113 along the first direction is h2, if the thickness of the brush strip 113 along the first direction is greater than 1.2 mm, the hardness of the brush strip 113 may be too high, resulting in excessive friction between the brush strip 113 and the filter assembly 2, affecting the relative movement of the brush strip 113 and the filter assembly 2 and shortening the service life of the pre-filter. If the thickness of the brush strip 113 along the second direction is less than 0.8 mm, the hardness of the brush strip 113 may be too low, resulting in excessive friction between the brush strip 113 and the filter assembly 2, affecting the cleaning effect of the filter assembly 2. Specifically, the thickness of the brush strip 113 along the first direction can be 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, 1.05 mm, 1.1 mm, 1.15 mm, 1.2 mm, etc.

[0073] In another embodiment of the present invention, please refer to Figures 6 to 10 The cleaning portion 111 is configured as a brush sheet 114 extending along the first direction, thereby facilitating the processing of the cleaning portion 111 and the base portion 112 .

[0074] Specifically, the corners of the brush sheet 114 are rounded, and the radius of the rounded corners is greater than or equal to 0.2 mm and less than or equal to 0.4 mm. Specifically, the rounded corners of the brush sheet 114 facilitate the processing of the brush sheet 114 on the one hand, and reduce the friction between the corners of the brush sheet 114 and the cleaning component on the other hand. Let the radius of the rounded corners be R1. If the radius of the rounded corners is greater than 0.4 mm, the radius of the corners is too large, which may affect the cleaning area of ​​the brush sheet 114 and the cleaning effect of the filter component 2. If the radius of the rounded corners is less than 0.2 mm, the radius of the corners is too small, which is inconvenient for the processing of the brush sheet 114. Specifically, the radius of the rounded corners can be 0.2 mm, 0.22 mm, 0.25 mm, 0.27 mm, 0.3 mm, 0.32 mm, 0.35 mm, 0.37 mm, 0.4 mm, etc.

[0075] See also Figures 3 to 10 In an embodiment of the present utility model, the diameter of the base portion 112 is greater than or equal to 3 mm and less than or equal to 5 mm. Specifically, the diameter of the base portion 112 is d1. If the diameter of the base portion 112 is greater than 5 mm, the base portion 112 is too thick, which may occupy the installation space of the cleaning portion 111 and affect the installation of the cleaning portion 111; if the diameter of the base portion 112 is less than 3 mm, the base portion 112 is too thin. During the cleaning process, bending or breaking may occur between the cleaning portion 111 and the filter assembly 2, affecting the stability of the cleaning portion 111. Therefore, the diameter of the base portion 112 is greater than or equal to 3 mm and less than or equal to 5 mm. It can not only ensure the structural strength of the base portion 112, ensure the stability of the cleaning portion 111, but also ensure that the cleaning portion 111 has sufficient installation space. Specifically, the diameter of the base portion 112 may be 3 mm, 3.2 mm, 3.5 mm, 3.7 mm, 4 mm, 4.2 mm, 4.5 mm, 4.7 mm, 5 mm, etc.

[0076] See also Figure 3In an embodiment of the present invention, the internal cleaning structure further includes a mounting portion 115, which is mounted on the inner side of the exoskeleton 1 and extends axially along the exoskeleton 1. A plurality of internal cleaning brushes 11 are arranged at intervals along the extension direction of the mounting portion 115, and a reinforcing rib 118 is provided between the base portion 112 and the mounting portion 115. Specifically, the mounting portion 115 is used to assemble with the exoskeleton 1. The plurality of internal cleaning brushes 11 are all provided on the mounting portion 115. Thus, by installing the mounting portion 115, the plurality of internal cleaning brushes 11 can be installed, thereby facilitating the installation of the internal cleaning structure. Furthermore, the mounting portion 115 extends axially along the exoskeleton 1, and the plurality of internal cleaning brushes 11 are arranged at intervals along the extension direction of the mounting portion 115. That is, the plurality of internal cleaning brushes 11 are arranged axially along the exoskeleton 1, thereby simultaneously cleaning the plurality of filter surfaces 22 of the filter assembly 2 and improving cleaning efficiency. Preferably, the plurality of internal cleaning brushes 11 are evenly spaced along the extension direction of the mounting portion 115. Of course, in other embodiments, the intervals between two adjacent inner cleaning brushes 11 may also be set to be unequal, and designers may design it according to the specific structure of the filter assembly 2 .

[0077] Among them, the mounting portion 115 and the base portion 112 can be integrally formed, thereby facilitating the installation of the multiple internal cleaning brushes 11 and improving the installation stability of the internal cleaning brush 11. In order to further improve the installation stability of the internal cleaning brush 11, in this embodiment, a reinforcing rib 118 is provided between the base portion 112 and the mounting portion 115, that is, a reinforcing structure is provided at the connection between the base portion 112 and the mounting portion 115 to increase the installation strength between the two and reduce the base portion 112 from falling off between the cleaning portion 111 and the filter assembly 2, affecting the stability of the cleaning portion 111. Among them, the reinforcing rib 118 can be configured as a triangular rib or as a strip rib. And preferably, the reinforcing rib 118 is located on one side of the axial direction of the cleaning portion 111, that is, it is provided on the side in the axial direction of the filter assembly 2, which helps to reduce the width of the mounting portion 115 along the circumference of the outer skeleton 1. It helps to reduce the installation space required for the entire internal cleaning structure. In other embodiments, the base portion 112 and the mounting portion 115 may also be formed separately, such as the base portion 112 being bonded or clamped or fixed to the mounting portion 115 via fasteners.

[0078] For further information, see Figure 4 and Figure 8, the thickness of the reinforcing rib 118 is greater than or equal to 1.5 mm and less than or equal to 3 mm. Specifically, assuming that the thickness of the reinforcing plate is d2, if the thickness of the reinforcing portion is greater than 3 mm, the thickness of the reinforcing plate portion is too large, and the thickness of the reinforcing portion may be greater than the diameter of the base portion 112, which may not only cause unnecessary strength redundancy, but also increase the width of the mounting portion 115 along the circumference of the exoskeleton 1, which is not conducive to reducing the installation space required for the internal cleaning structure as a whole; if the thickness of the reinforcing portion is less than 1.5 mm, the thickness of the reinforcing plate portion is too small, and the thickness of the reinforcing portion may be less than the diameter of the base portion 112, then the strength of the reinforcing portion itself is limited, and the reinforcing effect on the base portion 112 is also limited. Therefore, the thickness of the reinforcing rib 118 is greater than or equal to 1.5 mm and less than or equal to 3 mm, so as to ensure the reinforcing effect of the reinforcing rib 118 on the base portion 112 without increasing the width of the mounting portion 115 along the circumference of the exoskeleton 1. Specifically, the thickness of the reinforcement rib 118 can be 1.5 mm, 1.7 mm, 2 mm, 2.2 mm, 2.5 mm, 2.7 mm, 3 mm, etc.

[0079] See also Figures 1 to 10 In an embodiment of the present invention, the filter assembly 2 includes a plurality of filter modules 21 connected in sequence along the axial direction of the outer skeleton 1, and the plurality of internal cleaning brushes 11 include a first internal cleaning brush 116 and / or a second internal cleaning brush 117. The first internal cleaning brush 116 is provided with a cleaning portion 111 on the side facing the filter assembly 2, and the second internal cleaning brush 117 is provided with cleaning portions 111 on both opposite sides of the axial direction of the filter assembly 2.

[0080] In this embodiment, the filter assembly 2 includes a plurality of filter modules 21 connected in sequence along the axial direction of the outer skeleton 1, and the filter module 21 includes two truncated cone-shaped filter units, and the large ends of the two filter units are connected to each other, so the multiple internal cleaning brushes 11 include a first internal cleaning brush 116 and a second internal cleaning brush 117. The first internal cleaning brush 116 is provided with a cleaning portion 111 on the side facing the filter assembly 2, that is, the first internal cleaning brush 116 is provided with a cleaning portion 111 only on one side of the axial end of the base portion 112, and the second internal cleaning brush 117 is provided with a cleaning portion 111 on the opposite side of the axial direction of the filter assembly 2. Cleaning parts 111 are provided on both sides, that is, cleaning parts 111 are provided on opposite sides of the axial end of the base part 112 of the second internal cleaning brush 117. At this time, the first cleaning brush is provided at the opposite ends of the filter component 2, and is used to clean the single filter surface 22 at the axial end of the filter component 2, which helps to reduce the length of the internal cleaning structure along the outer skeleton 1; the second cleaning brush is provided between two adjacent filter modules 21, so as to clean the two opposite cleaning surfaces of the two filter modules 21 respectively, which helps to save the number of internal cleaning brushes 11 and reduce the space occupied by the internal cleaning structure inside the outer skeleton 1.

[0081] In another embodiment, the filter assembly 2 includes a plurality of filter modules 21 connected in sequence along the axial direction of the exoskeleton 1, and the filter module 21 includes two truncated cone-shaped filter units, and the small ends of the two filter units are connected to each other, so the plurality of internal cleaning brushes 11 include a second internal cleaning brush 117, and the second internal cleaning brush 117 is provided with a cleaning portion 111 on opposite sides of the axial direction of the filter assembly 2, that is, the base portion 112 of the second internal cleaning brush 117 is provided with a cleaning portion 111 on opposite sides of the axial end. At this time, the second cleaning brush extends into the adjacent filter module 21 and is located between the two filter units, thereby cleaning the two opposite cleaning surfaces of the filter module 21 respectively, which helps to save the number of internal cleaning brushes 11 and reduce the space occupied by the internal cleaning structure inside the exoskeleton 1.

[0082] To improve the cleaning effect of filter assembly 2, in an embodiment of the present invention, multiple internal cleaning structures are spaced apart along the inner circumference of the exoskeleton 1. Specifically, the provision of multiple internal cleaning structures allows the filter assembly 2 to be cleaned multiple times with each rotation of the exoskeleton 1 relative to the filter assembly 2, thereby improving the cleaning efficiency of the filter assembly 2. Furthermore, the multiple internal cleaning structures are spaced apart along the inner circumference of the exoskeleton 1, facilitating their installation.

[0083] In an embodiment of the present invention, the inner side of the exoskeleton 1 is provided with a plurality of mounting positions 101 arranged in a relative manner, and at least one internal cleaning structure is installed on each mounting position 101. Specifically, the inner side of the exoskeleton 1 is provided with a plurality of mounting positions 101 arranged in a relative manner, that is, the internal cleaning structures are arranged in a relative manner, thereby facilitating the rapid installation of the internal cleaning structures, and at least one internal cleaning structure is installed on each mounting position 101, further increasing the number of internal cleaning structures and improving the cleaning efficiency of the internal cleaning structures.

[0084] The present utility model also proposes a water use system, which includes a pre-filter. The specific structure of the pre-filter refers to the above-mentioned embodiment. Since the water use system 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.

[0085] The above are merely exemplary embodiments of the present invention and are not intended to 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 applications 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 provided in the water filter cavity and is rotatably sleeved on the outer periphery of the filter assembly. An internal cleaning structure is installed on the inner side of the exoskeleton. The internal cleaning structure includes an internal cleaning brush protruding along a first direction, and a cleaning portion is provided on the internal cleaning brush. The cleaning portion is at least located on the side of the internal cleaning brush distributed in the axial direction of the filter assembly. The filter assembly has a filter surface extending radially, and the cleaning portion is used to clean the filter surface.

2. The prefilter according to claim 1, wherein The width of the cleaning portion along the first direction is greater than or equal to 4 mm and less than or equal to 6 mm; and / or, The thickness of the cleaning portion is greater than or equal to 0.3 mm and less than or equal to 0.7 mm.

3. The prefilter according to claim 1, wherein: The cleaning portion is gradually expanded in a direction away from the filter assembly.

4. The prefilter according to claim 1, wherein The cleaning portion has a cleaning surface facing the filter assembly, and an angle between the cleaning surface and the first direction is greater than or equal to 10° and less than or equal to 12°.

5. The pre-filter according to claim 4, characterized in that The angle between the cleaning surface and the first direction is 10.8°.

6. The prefilter according to claim 1, wherein: The cleaning portion has a cleaning surface facing the filter assembly, and the cleaning surface is arranged in an interference fit with the surface of the filter assembly; and / or, The cleaning portion partially extends into the filter assembly, and a depth of the cleaning portion extending into the filter assembly is greater than or equal to 0.2 mm and less than or equal to 0.4 mm.

7. The prefilter according to claim 1, wherein: The cleaning portion includes a plurality of brush bars spaced apart along the first direction.

8. The pre-filter according to claim 7, characterized in that The interval between two adjacent brush strips is greater than or equal to 0.2 mm and less than or equal to 0.4 mm; and / or, The thickness of the brush strip along the first direction is greater than or equal to 0.8 mm and less than or equal to 1.2 mm.

9. The prefilter according to claim 1, wherein: The cleaning portion is configured as a brush extending along the first direction.

10. The pre-filter according to claim 9, characterized in that: The corners of the brush sheet are rounded, and the radius of the rounded corners is greater than or equal to 0.2 mm and less than or equal to 0.4 mm.

11. The prefilter according to claim 1, wherein The cleaning portion is configured as a flexible cleaning portion; and / or, the cleaning portion is made of a flexible material.

12. The pre-filter according to claim 1, wherein The inner cleaning brush further comprises a base portion protruding from the inner circumference of the outer frame along the first direction, and the cleaning portion is provided on a side portion of the base portion facing one end of the filter assembly.

13. The pre-filter according to claim 12, wherein: At least a portion of the cleaning portion is tapered in a direction away from the base portion.

14. The pre-filter according to claim 12, wherein: The diameter of the base portion is greater than or equal to 3 mm and less than or equal to 5 mm.

15. The pre-filter according to claim 12, wherein: The internal cleaning structure also includes a mounting portion, which is mounted on the inner side of the outer skeleton and extends axially along the outer skeleton. A plurality of internal cleaning brushes are arranged at intervals along the extension direction of the mounting portion, and reinforcing ribs are provided between the base portion and the mounting portion.

16. The pre-filter according to claim 15, characterized in that The thickness of the reinforcing rib is greater than or equal to 1.5 mm and less than or equal to 3 mm.

17. The pre-filter according to claim 1, wherein The filter assembly includes a plurality of filter modules connected in sequence along the axial direction of the outer skeleton, and the plurality of internal cleaning brushes include a first internal cleaning brush and / or a second internal cleaning brush. The first internal cleaning brush is provided with the cleaning portion on the side facing the filter assembly, and the second internal cleaning brush is distributed on both opposite sides of the axial direction of the filter assembly and is provided with the cleaning portion.

18. The pre-filter according to claim 1, wherein A plurality of the inner cleaning structures are spaced apart along the inner circumference of the outer frame; or, A plurality of installation positions are arranged opposite to each other on the inner side of the outer frame, and at least one inner cleaning structure is installed on each of the installation positions.

19. A water system, characterized in that: The method comprises the pre-filter according to any one of claims 1 to 18.

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