Pre-filter and water system

Abstract

The utility model discloses a prefilter and water consuming system relates to filter technical field, wherein prefilter includes shell and outer skeleton, the shell is equipped with water inlet, water outlet and with the water filter cavity of water inlet and water outlet intercommunication, is equipped with filter subassembly in the water filter cavity; the outer framework is rotatably arranged in the water filtering cavity and arranged outside the filtering assembly in a sleeving mode, the outer framework is provided with a water flow driving part and a cleaning structure, the water flow driving part is provided with a driving face, and the driving face is arranged in an included angle mode relative to the circumferential direction of the outer framework, so that after the driving face is impacted by water flow, the cleaning structure is arranged on the outer framework. The driving structure can drive the outer framework to rotate, so that the cleaning structure cleans the inner wall of the filtering assembly and / or the water filtering cavity; according to the technical scheme provided by the utility model, impurities attached in the water filtering cavity can be conveniently and timely cleaned, and the filtering effect of the pre-filter is ensured.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a pre-filter and a water system. Background Technology

[0002] As people's living standards continue to improve, their demands for daily water use are also increasing. Due to long-term neglect and aging, tap water pipes often contain large particles harmful to the human body, such as sediment, rust, and red worms, seriously affecting residents' drinking water health. Therefore, installing a pre-filter, which contains filtration components, can filter large particles from tap water before it reaches the faucet.

[0003] However, while the pre-filter is filtering water, impurities will adhere to the filter chamber, such as on the surface of the filter components and the inner wall of the filter chamber. Over time, this will affect the filtration effect of the pre-filter. Utility Model Content

[0004] The main purpose of this invention is to provide a pre-filter and water system, which aims to facilitate timely cleaning of impurities attached to the filter chamber and ensure the filtration effect of the pre-filter.

[0005] To achieve the above objectives, the pre-filter proposed in this utility model includes:

[0006] The housing includes a water inlet, a water outlet, and a filter chamber connecting the water inlet and the water outlet, wherein a filter assembly is provided within the filter chamber; and

[0007] An outer frame is rotatably disposed inside the water filtration chamber and sleeved on the outside of the filter assembly. The outer frame is provided with a water flow driving component and a cleaning structure. The water flow driving component has a driving surface, which is set at an angle relative to the circumference of the outer frame. This allows the driving surface to rotate after being impacted by water flow, so that the cleaning structure can clean the inner wall of the filter assembly and / or the water filtration chamber.

[0008] In one embodiment, the outer frame includes a circumferentially enclosing side frame, the cleaning structure extends axially along the side frame, and the cleaning structure and the water flow drive are circumferentially offset along the side frame.

[0009] In one embodiment, the outer frame includes a circumferentially enclosing side frame, and the water flow drive is engaged with the end of the side frame near the water inlet.

[0010] In one embodiment, the water flow drive includes a hook-on portion that is hooked onto the end of the side frame and engages with the side frame.

[0011] In one embodiment, the hook-on portion is flush with the outer peripheral wall of the side frame; and / or,

[0012] The protrusion height of the hook part on the outer peripheral wall of the side frame is less than the protrusion height of the external cleaning brush on the outer peripheral wall of the side frame.

[0013] In one embodiment, the water flow drive includes a drive body that conforms to the inner peripheral wall of the side frame. The drive body extends in a circumferential arc along the side frame and is provided with a plurality of baffles at intervals. The drive surface is formed on the baffles.

[0014] In one embodiment, the pre-filter further includes a water distributor, which is disposed closer to the water inlet than the water flow drive member, and the water distributor has a plurality of guide vanes that are relatively axially inclined in the circumferential direction.

[0015] And / or, the outer frame is provided with a plurality of water flow driving elements, which are distributed at intervals along the circumference of the outer frame.

[0016] In one embodiment, the pre-filter further includes an impeller body, which is tractively connected to the end of the outer frame away from the water flow drive component.

[0017] In one embodiment, the housing is further provided with a drain outlet, and the pre-filter further includes a mounting base. The mounting base is disposed in the water filtration chamber and located between the outer frame and the drain outlet. The mounting base is provided with an impeller chamber, and the impeller body is rotatably disposed in the impeller chamber. The impeller chamber can communicate with the water filtration chamber and the drain outlet.

[0018] In one embodiment, the cleaning structure further includes an inner cleaning brush protruding from the inner side of the outer frame and an outer cleaning brush protruding from the outer side of the outer frame. The inner cleaning brush is provided with a cleaning part that extends axially in the outer frame. The filter assembly has a filter surface that extends radially in the outer frame. The cleaning part is provided correspondingly to the filter surface for cleaning the filter surface. The outer cleaning brush is used to clean the inner wall of the water filtration chamber.

[0019] In one embodiment, the outer frame is further provided with a mounting part, the inner cleaning brush is disposed on the side of the mounting part facing the inner side of the outer frame, and the outer cleaning brush is disposed on the side of the mounting part facing the outer side of the outer frame.

[0020] In one embodiment, the mounting portion is detachably mounted to the outer frame; and / or,

[0021] The mounting part, the outer cleaning brush, and the inner cleaning brush are integrally formed.

[0022] In one embodiment, the cleaning section is located at least on the side of the filter assembly where the inner cleaning brushes are distributed axially and parallel to the axial direction of the outer frame.

[0023] In one embodiment, the cleaning part extends obliquely relative to the axial direction of the outer frame in the circumferential direction.

[0024] In one embodiment, multiple cleaning sections and filter surfaces are distributed axially on the outer frame accordingly;

[0025] Furthermore, the plurality of cleaning sections are inclined relative to the axial direction of the outer frame along the same circumference; and / or, adjacent cleaning sections are arranged at an acute angle.

[0026] In one embodiment, the inner cleaning brush further includes a base portion protruding from the inner peripheral side of the outer frame, and the cleaning portion is connected to the outer peripheral side of the base portion;

[0027] Furthermore, the cleaning portion is gradually expanding in the direction away from the filter assembly; and / or, at least a portion of the cleaning portion is gradually contracting in the direction away from the substrate.

[0028] In one embodiment, the cleaning unit includes a plurality of brush strips spaced apart;

[0029] Alternatively, the cleaning unit may be configured as a brush.

[0030] In one embodiment, the filter assembly includes a plurality of filter modules connected sequentially along the axial direction of the outer frame, 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 has one cleaning part, and the second inner cleaning brush has two cleaning parts extending in opposite directions along the axial direction of the outer frame.

[0031] This utility model also proposes a water system, including a pre-filter as described above.

[0032] The technical solution of this utility model is achieved by setting a water filtration chamber inside the housing, and an inlet and an outlet connecting the water filtration chamber. Both the filter assembly and the outer frame are provided with water filtration chambers. The outer frame can rotate inside the water filtration chamber, thereby rotating relative to the inner wall of the water filtration chamber and the filter assembly. The cleaning structure is fixed to the outer frame, which is set towards the inner wall of the filter assembly and / or the water filtration chamber. This allows the outer frame to drive the cleaning structure to rotate relative to the inner wall of the water filtration chamber and the filter assembly, cleaning the inner wall of the filter assembly and / or the water filtration chamber, thus facilitating the cleaning of the inner wall of the filter assembly and / or the water filtration chamber.

[0033] The outer frame also includes a water flow drive component with a driving surface. This driving surface is angled relative to the circumference of the outer frame, allowing the outer frame to rotate within the filter chamber after being impacted by the water flow. This driving surface can be opposite or inclined to the direction of water flow in the filter chamber, or it can be inclined relative to the circumference of the outer frame. When the driving surface is driven by the water flow, the water flow drive component generates a driving force on the outer frame 50 circumferentially, causing the outer frame to rotate around its axial direction, i.e., around the axial direction of the filter assembly. This allows the kinetic energy of the water flow to be converted into the kinetic energy of the outer frame's rotation via the driving surface. Therefore, no additional drive mechanism is needed to drive the outer frame's rotation. This also effectively agitates the water flow in the filter chamber, preventing impurities from depositing and adhering to the filter assembly, outer frame, and sidewalls of the filter chamber, reducing the likelihood of clogging and ensuring the filtration effect of the filter assembly. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 A schematic diagram of the internal structure of an embodiment of the pre-filter provided by this utility model;

[0036] Figure 2 for Figure 1 Assembly drawing of the inner and outer frame, water distributor and impeller body;

[0037] Figure 3 for Figure 1 Assembly drawing of the outer frame and impeller body;

[0038] Figure 4 for Figure 1 Schematic diagram of the assembly structure of the inner and outer frame and filter components;

[0039] Figure 5 for Figure 1 A schematic diagram of the exoskeleton at one angle;

[0040] Figure 6 for Figure 1 Another structural diagram of the exoskeleton in the diagram;

[0041] Figure 7 for Figure 1 Another angular structural diagram of the exoskeleton;

[0042] Figure 8 for Figure 7Cross-sectional view of the outer and middle skeleton along AA;

[0043] Figure 9 for Figure 1 A structural schematic diagram of the mounting section at one angle;

[0044] Figure 10 for Figure 9 A magnified view of a section at point A in the middle;

[0045] Figure 11 for Figure 1 Another structural diagram of the mounting section;

[0046] Figure 12 A schematic diagram of the mounting portion at an angle in another embodiment of the pre-filter provided by this utility model;

[0047] Figure 13 for Figure 12 A magnified view of a section at point B in the middle;

[0048] Figure 14 for Figure 10 Another structural diagram of the mounting section;

[0049] Figure 15 A cross-sectional view of the assembly structure of the outer frame and filter components in another embodiment of the pre-filter provided by this utility model;

[0050] Figure 16 for Figure 15 A schematic diagram of the exoskeleton structure;

[0051] Figure 17 for Figure 15 Cross-sectional view of the exoskeleton;

[0052] Figure 18 for Figure 15 A schematic diagram of the internal cleaning brush.

[0053] Explanation of icon numbers:

[0054] 1. Outer frame; 11. Inner cleaning brush; 111. Cleaning section; 112. Base section; 113. Mounting section; 114. Outer cleaning brush; 115. Receiving groove; 116. First inner cleaning brush; 117. Second inner cleaning brush; 118. Brush strip; 119. Brush blade; 12. Side frame; 2. Filter assembly; 21. Filter module; 22. Filter surface; 3. Water flow drive component; 31. Drive surface; 32. Hanging part; 33. Drive body; 34. Water baffle; 4. Water distributor; 41. Guide vane; 5. Impeller body; 51. Mounting base; 52. Impeller cavity; 6. Housing; 61. Filter chamber.

[0055] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0056] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0057] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0058] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0059] This invention proposes a pre-filter that allows for the switching of internal flow channels, enabling regular cleaning of the internal filter component 2 to remove previously intercepted large particles. This eliminates the need for manual disassembly and cleaning of the pre-filter, thus extending its service life.

[0060] Water systems, such as whole-house water purification systems, typically include pre-filters. These pre-filters remove large particles from tap water, ensuring water safety, extending the lifespan of appliances, preventing pipe blockages, and improving residents' health. The pre-filter is the first coarse filtration stage in a whole-house water purification system; it's a physical filtration device primarily used to intercept large particles larger than 40 microns, protecting downstream water supply.

[0061] Please see Figures 1 to 6 In one embodiment of this utility model, the pre-filter includes a housing 6, which has a water filtration chamber 61 and an inlet and an outlet communicating with the water filtration chamber 61. The housing 6 is usually formed in two parts, so the housing 6 includes a filter bottle and a valve head connected to the filter bottle. The water filtration chamber 61 is at least located in the filter bottle, and the inlet and outlet are both located in the valve head.

[0062] The inlet is connected to the water supply end of the water system, and the outlet is connected to the water consumption end of the water 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 pipe, a water tower, or well water, and the water consumption end can be a faucet, a shower head, or a drinking water outlet; this application does not make specific limitations in this regard.

[0063] The valve head and filter bottle are primarily connected by threaded connections. For example, the valve head has an externally threaded tube, and the filter bottle opening has a corresponding internal thread for screwing the externally threaded tube. To reduce the production difficulty of the pre-filter, lower the testing requirements for its assembly results, and reduce the material cost of the valve head, in this embodiment, the filter bottle and valve head are fastened together with fasteners.

[0064] The valve head includes a connected metal outer shell and a plastic inner liner, with the inlet and outlet formed within the plastic inner liner. This ensures that water flowing through the pre-filter directly contacts the plastic inner liner, rather than the metal outer shell, preventing contamination from metal elements leached from the metal outer shell and maintaining both aesthetic appeal and shell strength. In other embodiments, the valve head can also be directly configured as a metal component.

[0065] This application does not specifically limit the materials of the metal outer shell and the plastic inner liner. For example, the material of the metal outer shell can be a copper alloy, such as brass, and the material of the plastic inner liner can be PP (polypropylene) or PVC (polyvinyl chloride).

[0066] The pre-filter also includes a filter assembly 2 housed within the filtration chamber 61. Raw water (e.g., tap water or well water) flows into the inlet from an external water source and passes through the filter assembly 2 for filtration. This filter assembly 2 can intercept large particles of impurities in the water and remove sediment, rust, sand, bacteria, and other particulate impurities generated in the pipes. It provides good protection for water purifiers, washing machines, showerheads, high-end faucets, and downstream pipes, reducing the risk of damage to these devices due to clogging. The form and structure of the filter assembly 2 are not limited; it can be a stainless steel filter screen or a PP cotton filter screen.

[0067] The pre-filter is usually a "T" shaped structure. The top horizontal section has the water inlet and outlet on the left and right sides, respectively. The bottom vertical section is used to install the filter assembly 2. The bottom end (the end furthest from the water inlet 201) usually has a drain outlet, and the drain valve controls its opening and closing.

[0068] The pre-filter also includes an outer frame 1, which is rotatably disposed within the filtration chamber 61 and fitted over the filter assembly 2. The outer frame 1 is equipped with a cleaning structure, which rotates to clean the filter assembly 2 and / or the inner wall of the filtration chamber 61. Specifically, the outer frame 1 can rotate within the filtration chamber 61, thereby rotating relative to the inner wall of the filtration chamber 61 and the filter assembly 2. The cleaning structure is fixed to the outer frame 1, which is positioned towards the inner wall of the filter assembly 2 and / or the filtration chamber 61. This allows the outer frame 1 to drive the cleaning structure to rotate relative to the inner wall of the filtration chamber 61 and the filter assembly 2, cleaning the inner wall of the filter assembly 2 and / or the filtration chamber 61, thus facilitating the cleaning of the inner wall of the filter assembly 2 and / or the filtration chamber 61.

[0069] The outer frame 1 is also equipped with a water flow drive component 3, which has a drive surface 31. The drive surface 31 is set at an angle relative to the circumference of the outer frame 1, so that after the drive surface 31 is subjected to the impact of the water flow, it can drive the outer frame 1 to rotate in the water filter chamber 61. The drive surface 31 is opposite to or inclined to the direction of the water flow in the water filter chamber 61, and can also be inclined relative to the circumference of the outer frame 1. When the drive surface 31 is pushed by the water flow, the water flow drive component 3 can generate a driving force on the outer frame 1 in the circumference, thereby causing the outer frame 1 to rotate around its axis, that is, around the axis of the filter assembly 2. This allows the kinetic energy of the water flow to be converted into the kinetic energy of the rotation of the outer frame 1 through the drive surface 31. Therefore, there is no need to set up an additional drive mechanism to drive the outer frame 1 to rotate. It can also fully disturb the water flow in the water filter chamber 61, prevent impurities from depositing and adhering to the side walls of the filter assembly 2, the outer frame 1, and the water filter chamber 61, reduce the possibility of clogging of the filter assembly 2, and thus ensure the filtration effect of the filter assembly 2.

[0070] Please see Figure 3 and Figure 6In an embodiment of this utility model, the outer frame 1 includes a side frame 12 that surrounds the outer frame 1 circumferentially. The cleaning structure extends axially along the side frame 12, and the cleaning structure and the water flow drive 3 are offset circumferentially along the side frame 12. Specifically, the side frame 12 serves as the main body of the outer frame 1 and is used for the installation of the cleaning structure and the water flow drive 3. The cleaning structure extends axially along the side frame 12 and preferably fills the entire axial direction of the side frame 12 to ensure sufficient cleaning area. If the cleaning structure and the water flow drive 3 overlap circumferentially along the side frame 12, they are prone to positional interference, affecting their respective installation. Therefore, the offset circumferential arrangement of the cleaning structure and the water flow drive 3 along the side frame 12 reduces the possibility of positional interference and ensures the cleaning area of ​​the cleaning structure.

[0071] It should be noted that the cleaning structure and the water flow drive 3 are circumferentially offset along the side frame 12, that is, their projections along the axial direction of the outer frame 1 do not overlap at all.

[0072] To facilitate the installation of the water flow drive component 3, in this embodiment of the invention, the outer frame 1 includes a side frame 12 that surrounds the perimeter, and the water flow drive component 3 is snapped onto the end of the side frame 12 near the water inlet. Specifically, the water flow drive component 3 is connected to the end of the side frame 12 by snapping, achieving separate molding of the side frame 12 and the water flow drive component 3, improving molding probability and convenience. The side frame 12 and the water flow drive component 3 are connected by snapping, which is convenient for connection operations. At the same time, the water flow drive component 3 can also remain stable at the end of the side frame 12, thereby improving production efficiency. Of course, in other embodiments, the water flow drive component 3 can also be connected to the side frame 12 by screwing, bonding, or integral molding, or the water flow drive component 3 can be snapped onto the axial center of the side frame 12.

[0073] In this embodiment, please refer again. Figure 3 and Figure 6The outer frame 1 is provided with multiple water flow driving components 3, which are spaced apart circumferentially along the outer frame 1. Specifically, the multiple water flow driving components 3 are spaced apart at the ends of the side frame 12 around the circumference of the outer frame 1. In this way, the multiple driving surfaces 31 distributed circumferentially on the outer frame 1 tend to be uniform, thereby balancing the driving force on the outer frame 1 in the circumferential direction, enabling the outer frame 1 to rotate at a uniform speed and ensuring the cleaning effect on the filter assembly 2. Without loss of generality, in this embodiment, the water flow driving components 3 are provided with multiple driving surfaces 31, which are uniformly distributed on the water flow driving components 3 along the circumference of the outer frame 1, and the multiple water flow driving components 3 are uniformly distributed in the circumferential direction of the side frame 12, thereby ensuring that the driving surfaces 31 are uniformly distributed in the circumferential direction of the side frame 12, so as to ensure the rotational stability of the outer frame 1. Of course, in other embodiments, the multiple water flow driving components 3 can also be distributed along the axial direction of the side frame 12 to balance the rotational stability of the outer frame 1 in the axial direction.

[0074] Furthermore, the water flow drive component 3 includes a hook-on portion 32, which hooks onto the end of the side frame 12 and engages with it. It can be understood that the water flow drive component 3 hooks onto the side frame 12 axially from its end, facilitating a convenient and stable connection. After the hook-on portion 32 is hooked onto the side frame 12, the water flow drive component 3 engages with it. This engagement can occur either with the hook-on portion 32 or with other parts of the water flow drive component 3. This hook-on connection provides a positioning reference for the connection between the water flow drive component 3 and the side frame 12, simplifying the connection process. Additionally, after the hook-on portion 32 is hooked onto the side wall, it provides a radial limit to the water flow drive component 3, preventing radial movement of the water flow drive component 3 relative to the side frame 12. Of course, in other embodiments, the water flow drive 3 can also be snapped onto the side wall by insertion or by a knob.

[0075] Preferably, the hook-on portion 32 is flush with the outer surface of the side frame 12 and the outer peripheral wall of the side frame 12. That is, in the circumferential direction, the hook-on portion 32 is flush with the side frame 12. Since the gap between the outer frame 1 and the inner wall of the filter chamber 61 is usually small, if the hook-on portion 32 protrudes circumferentially from the side frame 12, it may cause a certain degree of friction with the hook-on portion 32, which will not only increase the force required for the frame to rotate, but may also affect the installation stability of the water flow drive component 3.

[0076] In other embodiments, the protrusion height of the hook-on portion 32 on the outer peripheral wall of the side frame 12 is less than the protrusion height of the outer cleaning brush 114 on the outer peripheral wall of the side frame 12. That is, the protrusion height of the hook-on portion 32 on the outer peripheral wall of the side frame 12 is less than the gap between the outer frame 1 and the inner wall of the filter chamber 61, thereby effectively avoiding friction between the hook-on portion 32 and the inner wall of the filter chamber 61. To achieve this, the thickness of the hook-on portion 32 can be appropriately reduced, or a relief groove can be provided at the hook-on position of the side frame 12 and the hook-on portion 32 to reduce the protrusion height of the hook-on portion 32 on the outer peripheral wall of the side frame 12.

[0077] In an embodiment of this utility model, the water flow driving component 3 includes a driving body 33 that conforms to the inner peripheral wall of the side frame 12. The driving body 33 extends in an arc along the circumferential direction of the side frame 12 and is provided with a plurality of baffles 34 at intervals. A driving surface 31 is formed on the baffles 34. Without loss of generality, the baffles 34 protrude from the driving body 33, and the driving surface 31 is formed on the side wall of the baffles 34 along the circumferential direction of the side frame 12, so that the driving surface 31 can have a certain size in the radial direction, ensuring that the driving surface 31 is stably impacted by the water flow. At the same time, the driving body 33 extends in an arc along the inner peripheral direction of the side frame 12, and the plurality of baffles 34 are distributed at intervals in the extension direction of the driving body 33, so as to evenly distribute the driving force in the circumferential direction of the side frame 12, ensuring the stability of the rotation of the outer frame 1.

[0078] Furthermore, the drive body 33 is conformally mounted to the inner peripheral wall of the side frame 12, and the two fit tightly together. When the drive body 33 is under force, the inner wall of the side frame 12 can provide sufficient and stable support for the drive body 33, thereby effectively pulling the side frame 12 to rotate. This avoids energy waste caused by shaking between the water flow drive component 3 and the side frame 12, ensuring the rotation efficiency of the outer frame 1 and improving the cleaning effect on the filter component 2. Of course, in other embodiments, the drive body 33 can also be recessed with a drive groove, and the side wall of the drive groove is configured as a drive surface 31.

[0079] To facilitate the generation of driving force between the water flow drive component 3 and the water flow, please refer to the embodiments of this utility model. Figure 2 , Figure 3 and Figure 6The pre-filter also includes a water distributor 4, which is positioned closer to the inlet than the water flow drive 3. The water distributor 4 has multiple guide vanes 41 that are relatively axially inclined and distributed circumferentially. It can be understood that the water distributor 4 is located between the water flow drive 3 and the inlet, and the water flow from the inlet must first pass through the water distributor 4 before flowing to the water flow drive 3. The water distributor 4 has multiple guide vanes 41 that are circumferentially distributed around the filter assembly 2. The guide vanes 41 extend at an axial inclination relative to the filter assembly 2, and a relatively axially inclined flow channel is formed between two adjacent guide vanes 41. There are multiple such flow channels in the circumferential direction of the filter assembly 2. Furthermore, the guide vane 41 is tilted opposite to or tilted relative to the drive surface 31. Thus, under the guiding effect of the guide vane 41, the water flowing through the above-mentioned flow channel can impact the drive surface 31 vertically or nearly vertically. This not only ensures the magnitude of the driving force for rotating the outer frame 1, so that the outer frame 1 can rotate stably, but also, while ensuring that the drive surface 31 can drive the outer frame 1 to rotate in the circumferential direction of the side frame 12, the tilt of the drive surface 31 can be flexibly adjusted to adapt to various water flow environments.

[0080] It should be noted that on the side of the water distributor 4 near the inlet, the water flow can fully cover the water distributor 4, so that the direction of the water flow can be adjusted by any of the guide vanes 41. The water distributor 4 is fixedly connected to the housing 6. Correspondingly, there is a gap between the water distributor 4 and the water flow drive component 3 to ensure that the water flow guided by the guide vanes 41 can impact the corresponding drive surface 31. The water flow drive component 3 and the side frame 12 can generally rotate relative to the housing 6 within the water filter chamber 61. The water distributor 4 causes the water flow to flow in a circumferential vortex along the axial direction of the filter assembly 2. The drive surface 31 extends along the axial direction of the filter assembly 2, thereby generating a maximum circumferential driving force on the outer frame 1, improving the rotation speed of the outer frame 1 and the cleaning effect of the filter assembly 2.

[0081] Please see Figures 1 to 3 In this embodiment of the present invention, the pre-filter further includes an impeller body 5, which is tractively connected to the end of the outer frame 1 away from the water flow drive component 3. Specifically, both the outer frame 1 and the impeller body 5 are rotatably disposed within the housing 6, enabling synchronous rotation of the outer frame 1 and the impeller body 5. Driven by the water flow, the impeller body 5 rotates within the filter chamber 61, thereby pulling the outer frame 1 to rotate. Furthermore, both the water flow drive component 3 and the impeller body 5 can rotate in the water flow to pull the outer frame 1 to rotate, achieving mutual promotion of rotation and ensuring the rotational stability and efficiency of the outer frame 1. This effectively disturbs the water flow in the filter chamber 61, preventing impurities from depositing and adhering to the filter assembly 2, the outer frame 1, and the inner wall of the filter chamber 61, reducing the possibility of clogging of the filter assembly 2, and thus ensuring the filtration effect of the filter assembly 2.

[0082] The pre-filter has a normal filtration mode and an occasional cleaning mode. In filtration mode, only the inlet and outlet are connected to the pre-filter to achieve pre-filtration of water by the filter element 2. In cleaning mode, water flows into the filter chamber 61 from the inlet and out of the filter chamber 61 from the drain outlet. During this process, the water flow can impact the impeller body 5 in the impeller chamber 52, causing the impeller body 5 to rotate, which in turn pulls the outer frame 1 to rotate, thereby washing away impurities on the filter element 2, preventing the filter element 2 from clogging and improving the filtration effect. Regardless of whether it is filtration mode or cleaning mode, the water flow in the filter chamber 61 can impact the drive surface 31, causing the outer frame 1 to be pushed circumferentially, thereby achieving the rotation of the outer frame 1 itself, so as to prevent impurities from adhering to the filter element 2, preventing the filter element 2 from clogging and improving the filtration effect.

[0083] Furthermore, the impeller body 5 is connected to the end of the outer frame 1 away from the water flow drive component 3, meaning the water flow drive component 3 and the impeller body 5 are respectively located at opposite axial ends of the outer frame 1. It can be understood that when the pre-filter is in filtration or flushing mode, the driving surface 31 on the water flow drive component 3 pulls the outer frame 1 to rotate, and the impeller body 5 also rotates synchronously, forming rotational balance at both axial ends of the outer frame 1. This prevents eccentric rotation of the outer frame 1, ensuring its rotational stability, and thus uniformly cleaning impurities from the surface of the filter assembly 2 along the axial direction of the filter group. Especially during the flushing process, both the impeller body 5 and the water flow drive component 3 are impacted by the water flow, and both ends of the outer frame 1 have rotational driving force, effectively improving the rotational efficiency of the outer frame 1. This prevents impurities from adhering to the filter assembly 2 or washes them away from the surface of the filter assembly 2, ensuring the filtration effect of the pre-filter. Of course, in other embodiments, the water flow drive component 3 or the impeller assembly can also be located in the middle of the outer frame 1.

[0084] Please see Figure 1 In one embodiment, the pre-filter further includes a mounting base 51, which is disposed in the filter chamber 61 and located between the outer frame 1 and the drain outlet. The mounting base 51 has an impeller cavity 52, and the impeller body 5 is rotatably disposed in the impeller cavity 52. ​​The impeller cavity 52 connects the filter chamber 61 and the drain outlet. The mounting base 51 limits the impeller body 5 within the impeller cavity 52 and provides support for the impeller body 5, thereby supporting the outer frame 1 and ensuring the stability of the outer frame 1 and the impeller body 5 within the filter chamber 61. Furthermore, the mounting base 51 guides water flow from the filter chamber 61 to the impeller cavity 52, driving the impeller body 5 to rotate. The water then flows from the impeller cavity 52 towards the drain outlet 1, achieving a water diversion effect so that the impeller body 5 can be effectively driven by the water flow, thus ensuring the rotational stability of the outer frame 1.

[0085] Please see Figures 5 to 18In an embodiment of this utility model, the cleaning structure further includes an inner cleaning brush 11 protruding from the inner side of the outer frame 1 and an outer cleaning brush 114 protruding from the outer side of the outer frame 1. The inner cleaning brush 11 is provided with a cleaning part 111, which extends axially in the outer frame 1. The filter assembly 2 has a filter surface 22 extending radially in the outer frame 1. The cleaning part 111 is correspondingly provided with the filter surface 22 for cleaning the filter surface 22. The outer cleaning brush 114 is used to clean the inner wall of the water filtration chamber 61.

[0086] Specifically, the filter assembly 2 has a radially extending filter surface 22, that is, the filter surface 22 of the filter assembly 2 is set at an angle to the axial direction of the filter assembly 2. In the prior art, the cleaning part 111 of the inner cleaning brush 11 is usually located at the end of the inner cleaning brush 11 away from the outer frame 1 and protrudes inward to the outer frame 1. That is, the extension direction of the cleaning part 111 is roughly parallel to or has a small angle with the filter surface 22 of the filter assembly 2 in this solution. As a result, the cleaning effect of the cleaning part 111 on the filter surface 22 is limited, resulting in the presence of hard-to-clean hygiene dead corners on the surface of the filter assembly 2. Long-term attachment of impurities not only affects the filtration effect of the filter assembly 2, but also easily causes bacterial growth.

[0087] Therefore, an inner cleaning brush 11 is provided, extending axially in the outer frame 1, to correspond to the filter surface 22, thereby effectively cleaning the filter surface 22, reducing dead corners, and increasing the cleaning area of ​​the filter assembly 2 by the inner cleaning structure.

[0088] Furthermore, an external cleaning brush 114 protrudes from the outer side of the outer frame 1, facing the cavity wall of the water filter chamber 61. This external cleaning brush 114 cleans the inner surface of the water filter chamber 61, reducing the possibility of impurities adhering to the surface of the water filter chamber 61 and causing bacterial growth inside the pre-filter, thus ensuring the service life of the pre-filter. Therefore, when the outer frame 1 rotates inside the water filter chamber 61, it can simultaneously drive the inner cleaning brush 11 and the outer cleaning brush 114 of the water filter chamber 61 to rotate simultaneously, thereby cleaning both the filter assembly 2 and the inner wall of the water filter chamber 61 at the same time, improving the cleaning effect of the pre-filter.

[0089] For further details, please refer to [link / reference]. Figure 5 and Figure 8The outer frame 1 is also equipped with a mounting part 113. An inner cleaning brush 11 is located on the side of the mounting part 113 facing inwards from the outer frame 1, and an outer cleaning brush 114 is located on the side of the mounting part 113 facing outwards from the outer frame 1. Specifically, the mounting part 113 is used for assembly with the outer frame 1. Both the outer cleaning brush 114 and the inner cleaning brush 11 are located on the mounting part 113, thus facilitating the installation of the inner and outer cleaning brushes 114. In other embodiments, the inner cleaning brush 11 and the outer cleaning brush 114 can also be mounted on the outer frame 1 using their respective mounting structures; that is, the inner cleaning brush 11 and the outer cleaning brush 114 are independently configured and not connected to each other.

[0090] Furthermore, in the embodiments of this utility model, the mounting part 113, the outer cleaning brush 114, and the inner cleaning brush 11 are integrally formed. Specifically, the mounting part 113, the outer cleaning brush 114, and the inner cleaning brush 11 are integrally formed, which facilitates the installation of the inner cleaning brush 11 and the outer cleaning brush 114, and also ensures the stability of the installation of the inner cleaning brush 11 and the outer cleaning brush 114.

[0091] In other embodiments, the mounting portion 113 and the outer cleaning brush 114 can be integrally formed, thereby facilitating the installation of the plurality of outer cleaning brushes 114 and improving the installation stability of the outer cleaning brushes 114. In other embodiments, the outer cleaning brush 114 and the mounting portion 113 can also be separately formed, such as by bonding, snapping, or fixing the outer cleaning brush 114 to the mounting portion 113 with fasteners. The mounting portion 113 and the inner cleaning brush 11 can be integrally formed, thereby facilitating the installation of the plurality of inner cleaning brushes 11 and improving the installation stability of the inner cleaning brush 11. In other embodiments, the inner cleaning brush 11 and the mounting portion 113 can also be separately formed, such as by bonding, snapping, or fixing the inner cleaning brush 11 to the mounting portion 113 with fasteners. The mounting portion 113 can be separately formed from the outer frame 1, such as by bonding, snapping, or fixing the mounting portion 113 to the outer frame 1, thereby facilitating the overall processing of the outer frame 1 and allowing for the selection of materials for the outer frame 1 and the mounting portion 113. In other embodiments, the mounting part 113 may also be integrally formed with the outer frame 1.

[0092] To facilitate the disassembly of the inner cleaning brush 11 and the outer cleaning brush 114, in this embodiment of the utility model, the mounting part 113 is detachably mounted on the outer frame 1, thereby facilitating the disassembly of the inner cleaning brush 11 and the outer cleaning brush 114. When the inner cleaning brush 11 and / or the outer cleaning brush 114 fail, they can be replaced in time without having to replace the entire outer frame 1, thus facilitating the maintenance of the pre-filter.

[0093] Please see Figure 1 , Figure 2 , Figures 6 to 13In this embodiment of the present invention, the cleaning part 111 is located on the side of the inner cleaning brush 11 distributed along the axial direction of the filter assembly 2, and parallel to the axial direction of the outer frame; that is, the cleaning part 111 is located on the side of the inner cleaning brush 11 and parallel to the axial direction of the filter assembly 2, so that the cleaning part 111 is arranged opposite to the filter surface 22, thereby enabling the cleaning part 111 to directly clean the radially extending filter surface 22 of the filter assembly 2, thereby reducing dead corners and increasing the cleaning area of ​​the filter assembly 2 by the inner cleaning structure.

[0094] In an embodiment of this utility model, the inner cleaning brush 11 further includes a base portion 112 protruding from the inner circumferential side of the outer frame 1, and a cleaning portion 111 disposed on the side of the base portion 112 facing the filter assembly 2. Specifically, the base portion 112 protrudes from the inner circumferential side of the outer frame 1, that is, the base portion 112 extends inward toward the outer frame 1. The base portion 112 can extend radially along the outer frame 1, or it can be set at a certain angle to the radial direction of the outer frame 1. Designers can configure this according to the specific structure of the filter assembly 2. The cleaning portion 111 is disposed on the side of the base portion 112 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 size of the inner cleaning brush 11, thus facilitating the installation of the inner cleaning brush 11.

[0095] For further details, please refer to [link / reference]. Figures 9 to 14 The cleaning section 111 gradually expands in the direction away from the filter assembly 2; specifically, the length of the cleaning section 111 increases in the direction away from the filter assembly 2. Let the length of the cleaning section 111 be h1. If the filter surface 22 is a sloping surface extending radially, the shape of the cleaning section 111 perfectly matches the filter surface 22, ensuring effective cleaning. If the filter surface 22 is planar, the frictional force increases further away from the central axis of the filter assembly 2, thereby improving the cleaning effect at the outer corners of the filter assembly 2 and reducing dead corners. The outer contour of the cleaning section 111 of this cleaning assembly, on the side away from the base portion 112, can be straight, curved, or stepped.

[0096] Furthermore, please refer to the following: Figures 9 to 14At least a portion of the cleaning section 111 tapers away from the base section 112, meaning that the thickness H1 of at least a portion of the cleaning section 111 gradually decreases away from the base section 112. This ensures that the cleaning section 111 has sufficient frictional force against the filter assembly 2, thus guaranteeing the cleaning effect, without affecting the relative movement between the cleaning section 111 and the filter assembly 2. Furthermore, the taper of the cleaning section 111 away from the base section 112 also allows the thickness of the side where the cleaning section 111 connects to the base section 112 to be greater than the thickness of the free end of the cleaning section 111, thereby improving the stability of the connection between the cleaning section 111 and the base section 112. Additionally, the lower thickness of the free end of the cleaning section 111 facilitates the insertion of a portion of the free end into the gaps of the filter screen formed by the filter assembly 2, improving the cleaning effect.

[0097] See Figures 9 to 11 In one embodiment, the cleaning section 111 includes a plurality of brush strips 118 spaced apart; specifically, the plurality of brush strips 118 are arranged at intervals to form a cleaning section 111, thereby facilitating adjustment of the width D1 of the cleaning section 111.

[0098] See Figures 12 to 14 In another embodiment, the cleaning part 111 is configured as a brush 119, thereby facilitating the processing of the cleaning part 111 and the base part 112.

[0099] In an embodiment of this utility model, the filter assembly 2 includes a plurality of filter modules 21 connected sequentially along the axial direction of the outer frame 1, and a plurality of inner cleaning brushes 11 including a first inner cleaning brush 116 and / or a second inner cleaning brush 117. The first inner cleaning brush 116 has a cleaning part 111 on one side facing the filter assembly 2, and the second inner cleaning brush 117 has cleaning parts 111 on both opposite sides along the axial direction of the filter assembly 2.

[0100] See Figure 1 and Figure 4In this embodiment, the filter assembly 2 includes multiple filter modules 21 connected sequentially along the axial direction of the outer frame 1. Each filter module 21 includes two frustum-shaped filter units, with their large ends connected to each other. Therefore, the multiple inner cleaning brushes 11 include a first inner cleaning brush 116 and a second inner cleaning brush 117. The first inner cleaning brush 116 has a cleaning part 111 on the side facing the filter assembly 2, that is, the first inner cleaning brush 116 only has a cleaning part 111 on one side of the axial end of the base portion 112. The second inner cleaning brush 117 is located opposite to the filter assembly 2 along the axial direction. Cleaning sections 111 are provided on both sides, that is, cleaning sections 111 are provided on both opposite sides of the axial end of the base part 112 of the second inner cleaning brush 117. At this time, the first cleaning brush is provided at the opposite ends of the filter assembly 2 to clean the single filter surface 22 at the axial end of the filter assembly 2, which helps to reduce the length of the inner cleaning structure along the outer frame 1; the second cleaning brush is provided between two adjacent filter modules 21, thereby cleaning the two opposite cleaning surfaces of the two filter modules 21 respectively, which helps to save the number of inner cleaning brushes 11 and reduce the space occupied by the inner cleaning structure inside the outer frame 1.

[0101] In another embodiment, the filter assembly 2 includes a plurality of filter modules 21 connected sequentially along the axial direction of the outer frame 1, and each filter module 21 includes two frustum-shaped filter units, with the small ends of the two filter units connected to each other. Therefore, the plurality of inner cleaning brushes 11 include a second inner cleaning brush 117. The second inner cleaning brush 117 has cleaning portions 111 on both opposite sides along the axial direction of the filter assembly 2, that is, cleaning portions 111 are provided on both opposite sides of the axial ends of the base portion 112 of the second inner cleaning brush 117. 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 inner cleaning brushes 11 and reduce the space occupied by the inner cleaning structure inside the outer frame 1.

[0102] See Figure 5 , Figure 7 and Figure 8 In one embodiment, the outer cleaning brush 114 is configured as a brush strip 118 extending axially along the outer frame 1. Specifically, the outer cleaning brush 114 is configured as a brush strip 118, which facilitates the forming of the outer cleaning brush 114, and the outer cleaning brush 114 extends axially along the outer frame 1, thereby increasing the cleaning area of ​​the outer cleaning brush 114. In this embodiment, the outer cleaning brush 114 has a straight structure; in other embodiments, the outer cleaning brush 114 may extend spirally or bend along the axial direction of the outer frame 1.

[0103] At least a portion of the external cleaning brush 114 is tapered in the direction away from the axis of the outer frame 1. That is, the thickness of at least a portion of the external cleaning brush 114 along the axial direction of the outer frame 1 gradually decreases in the direction away from the outer frame 1. This ensures that the external cleaning brush 114 exerts a certain force on the inner wall of the filter chamber 61, thus guaranteeing the cleaning effect, without affecting the relative movement of the external cleaning brush 114 on the inner wall of the filter chamber 61. Furthermore, the tapering shape of the external cleaning brush 114 in the direction away from the outer frame 1 also allows the thickness of the side of the external cleaning brush 114 connected to the outer frame 1 to be greater than the thickness of the external cleaning brush 114 itself, thereby improving the stability of the connection between the external cleaning brush 114 and the outer frame 1.

[0104] The cleaning brush can be entirely tapered away from the outer frame 1, in which case the cross-section of the cleaning brush perpendicular to the axis of the outer frame 1 is triangular. Alternatively, only a portion of the cleaning brush can be tapered away from the outer frame 1, in which case the cross-section of the cleaning brush perpendicular to the axis of the outer frame 1 is trapezoidal or a combination of rectangle and triangle.

[0105] This utility model also proposes a water system, which includes a pre-filter. The specific structure of the pre-filter is as described in the above embodiments. Since this water system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The water system includes at least related components from the pre-filter to the water outlet. For example, the water system may include household appliances such as water heaters, dishwashers, and water dispensers, or auxiliary components such as water pipes for domestic water use throughout the house.

[0106] The above are merely exemplary embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A pre-filter, characterized in that, include: The housing has a water inlet, a water outlet, and a water filter chamber connecting the water inlet and the water outlet, and the water filter chamber is equipped with a filter assembly; as well as An outer frame is rotatably disposed inside the water filtration chamber and sleeved on the outside of the filter assembly. The outer frame is provided with a water flow driving component and a cleaning structure. The water flow driving component has a driving surface, which is set at an angle relative to the circumference of the outer frame. This allows the driving surface to rotate after being impacted by water flow, so that the cleaning structure can clean the inner wall of the filter assembly and / or the water filtration chamber.

2. The pre-filter as described in claim 1, characterized in that, The outer frame includes a side frame that surrounds the periphery, the cleaning structure extends axially along the side frame, and the cleaning structure and the water flow drive are offset from each other circumferentially along the side frame.

3. The pre-filter as described in claim 1, characterized in that, The outer frame includes a side frame that surrounds the perimeter, and the water flow drive component is snapped into the end of the side frame near the water inlet.

4. The pre-filter as described in claim 3, characterized in that, The water flow drive component includes a hook-on part, which is hooked onto the end of the side frame and engaged with the side frame.

5. The pre-filter as described in claim 4, characterized in that, The mounting portion is flush with the outer peripheral wall of the side frame; and / or The protrusion height of the hook part on the outer peripheral wall of the side frame is less than the protrusion height of the cleaning structure on the outer peripheral wall of the side frame.

6. The pre-filter as described in claim 3, characterized in that, The water flow driving component includes a driving body that conforms to the inner peripheral wall of the side frame. The driving body extends in a circumferential arc along the side frame and is provided with multiple baffles at intervals. The driving surface is formed on the baffles.

7. The pre-filter as described in claim 1, characterized in that, The pre-filter also includes a water distributor, which is located closer to the water inlet than the water flow drive component. The water distributor has multiple guide vanes that are relatively axially inclined in the circumferential direction. And / or, the outer frame is provided with a plurality of water flow driving elements, which are distributed at intervals along the circumference of the outer frame.

8. The pre-filter as described in claim 1, characterized in that, The pre-filter also includes an impeller body, which is tractively connected to the end of the outer frame away from the water flow drive component.

9. The pre-filter as described in claim 8, characterized in that, The housing is also provided with a drain outlet, and the pre-filter also includes a mounting base. The mounting base is disposed in the water filtration chamber and located between the outer frame and the drain outlet. The mounting base is provided with an impeller chamber, and the impeller body is rotatably disposed in the impeller chamber. The impeller chamber can connect the water filtration chamber and the drain outlet.

10. The pre-filter as described in any one of claims 1 to 9, characterized in that, The cleaning structure further includes an inner cleaning brush protruding from the inner side of the outer frame and an outer cleaning brush protruding from the outer side of the outer frame. The inner cleaning brush is provided with a cleaning part that extends axially in the outer frame. The filter assembly has a filter surface that extends radially in the outer frame. The cleaning part is provided correspondingly to the filter surface for cleaning the filter surface. The outer cleaning brush is used to clean the inner wall of the water filtration chamber.

11. The pre-filter as claimed in claim 10, characterized in that, The outer frame is also equipped with a mounting part, the inner cleaning brush is located on the side of the mounting part facing the inside of the outer frame, and the outer cleaning brush is located on the side of the mounting part facing the outside of the outer frame.

12. The pre-filter as described in claim 11, characterized in that, The mounting part is detachably mounted to the outer frame; and / or The mounting part, the outer cleaning brush, and the inner cleaning brush are integrally formed.

13. The pre-filter as described in claim 10, characterized in that, The cleaning section is located at least on the side of the filter assembly where the inner cleaning brushes are distributed along the axial direction, and is parallel to the axial direction of the outer frame.

14. The pre-filter as described in claim 10, characterized in that, The cleaning section extends obliquely relative to the axial direction of the outer frame along its circumference.

15. The pre-filter as described in claim 14, characterized in that, The cleaning section and the filter surface are distributed in multiple ways along the axial direction of the outer frame. Furthermore, the plurality of cleaning sections are inclined relative to the axial direction of the outer frame along the same circumference; and / or, adjacent cleaning sections are arranged at an acute angle.

16. The pre-filter as claimed in claim 10, characterized in that, The inner cleaning brush also includes a base portion protruding from the inner peripheral side of the outer frame, and the cleaning part is connected to the outer peripheral side of the base portion; Furthermore, the cleaning portion is gradually expanding in the direction away from the filter assembly; and / or, at least a portion of the cleaning portion is gradually contracting in the direction away from the substrate.

17. The pre-filter as claimed in claim 10, characterized in that, The cleaning unit includes multiple brush strips spaced apart; Alternatively, the cleaning unit may be configured as a brush.

18. The pre-filter as claimed in claim 10, characterized in that, The filter assembly includes multiple filter modules connected sequentially along the axial direction of the outer frame, and the multiple inner cleaning brushes include a first inner cleaning brush and / or a second inner cleaning brush. The first inner cleaning brush has a cleaning part, and the second inner cleaning brush has two cleaning parts that extend in opposite directions along the axial direction of the outer frame.

19. The pre-filter as described in claim 18, characterized in that, The external cleaning brush is configured as a brush strip extending axially along the outer skeleton; and / or, At least a portion of the external cleaning brush is tapered in a direction away from the axis of the exoskeleton.

20. A water supply system, characterized in that, Includes a pre-filter as described in any one of claims 1 to 19.

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