Pre-filter and water system

Abstract

This invention discloses a pre-filter and a water system, relating to the field of filter technology. The pre-filter includes a valve head, a filter bottle, a filter assembly, an outer frame, and an impeller assembly. The outer frame is rotatably fitted over the filter assembly. The impeller assembly includes a mounting base fixedly installed within the filtration chamber and an impeller body rotatably installed on the mounting base. The impeller body and the outer frame are coaxially connected and fixed circumferentially. The mounting base includes a first inlet on one axial side, a second inlet on one circumferential side, and a drain outlet on the other axial side. The technical effect of the solution provided by this invention is to ensure the filtration effect of the filter assembly and improve the service life of the pre-filter.

Description

Technical Field

[0001] This invention 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 human health, such as sediment, rust, and red worms, seriously affecting residents' drinking water health. Therefore, pre-filters are installed. These pre-filters contain filter components to filter large particles from tap water before it reaches the faucet. However, while the pre-filter is filtering the water, impurities accumulate inside the filter chamber, especially on the surface of the filter components. Over time, this can clog the filter components, reducing their filtration efficiency. Summary of the Invention

[0003] The main objective of this invention is to provide a pre-filter and water system that aims to ensure the filtration effect of the filter components and improve the service life of the pre-filter.

[0004] To achieve the above objectives, the pre-filter proposed in this invention includes:

[0005] The valve head and filter bottle are provided, wherein the filter bottle forms a water filtration chamber, the valve head is provided with an inlet and an outlet that communicate with the water filtration chamber, and the filter bottle is provided with a drain outlet on the side away from the valve head.

[0006] A filter assembly is fixedly installed in the water filtration chamber. The filter assembly includes a filter module, which includes a support frame and a filter element. The support frame has a first water passage side located on one side of the axial direction and a second water passage side surrounding it in the circumferential direction. The filter element is disposed on the second water passage side.

[0007] An outer frame is located inside the water filtration chamber and is rotatably fitted onto the outside of the filter assembly;

[0008] The impeller assembly includes a mounting base fixedly installed in the water filter chamber and an impeller body rotatably installed on the mounting base. The impeller body and the outer frame are coaxially connected and fixed in the circumferential direction. The mounting base includes a first water inlet on one axial side, a second water inlet on the circumferential side, and a drain outlet on the other axial side.

[0009] In one embodiment, the outer frame includes a side frame and a chassis. The chassis is connected to the side frame on the side away from the valve head. The outer frame forms a siphon channel, which includes a sidewall channel and a bottom channel communicating with the sidewall channel. The sidewall channel is disposed corresponding to the side frame and has siphon holes facing the filter assembly. The bottom channel is disposed corresponding to the chassis and has a first discharge port, which is connected to at least one of the first inlet and the second inlet.

[0010] In one embodiment, the outer frame further includes a bottom cover, which, together with the chassis cover, forms the bottom flow channel.

[0011] In one embodiment, the bottom cover is disposed on the side of the chassis near the filter assembly, the filter assembly is rotatably connected to the bottom cover, and the first discharge port is disposed on the chassis.

[0012] In one embodiment, the bottom cover is detachably connected to the chassis.

[0013] In one embodiment, the chassis has a protruding flow channel groove, which is open on the side facing the filter assembly. The flow channel groove communicates with the side wall flow channel and extends to the center of the chassis. The bottom cover engages with the flow channel groove and seals the opening of the flow channel groove to form the bottom flow channel.

[0014] In one embodiment, the bottom cover covers the flow channel groove, the outer side wall of the flow channel groove is provided with a buckle, the bottom cover is provided with a buckle groove corresponding to the buckle, and the bottom cover is fixed to the chassis by the buckle and the buckle groove engaging.

[0015] In one embodiment, a buckle is provided on each of the opposite sides of the flow channel groove, and the chassis is provided with a process notch that passes through the chassis corresponding to the buckle. After the bottom cover is closed with the chassis, the bottom cover covers the process notch.

[0016] In one embodiment, the sidewall flow channels are provided at multiple intervals along the circumference of the side frame, the bottom cover includes multiple covering parts, one of the covering parts and the chassis surround to form a bottom flow channel, and the bottom flow channel is correspondingly connected to a sidewall flow channel.

[0017] In one embodiment, the chassis is provided with a second discharge port that extends through the axial direction, and a water-blocking structure is formed on the opposite side of the outer frame and the mounting base. The water-blocking structure is arranged around the first discharge port, and the second discharge port is located on the outer periphery of the water-blocking structure. The first discharge port is connected to the second water inlet, and the second discharge port is connected to the second water inlet.

[0018] In one embodiment, a cleaning structure is mounted on the outer frame for cleaning the inner peripheral wall of the filter bottle and at least one of the filter elements.

[0019] In one embodiment, a cleaning brush is provided on the inner peripheral wall of the exoskeleton, and the cleaning brush is arranged radially inclined relative to the exoskeleton in a direction from the outside to the inside.

[0020] In one embodiment, multiple cleaning brushes are distributed along the axial direction of the outer skeleton.

[0021] In one embodiment, two adjacent cleaning brushes extend in different directions along the axial direction of the outer frame.

[0022] In one embodiment, two adjacent cleaning brushes are arranged at an acute angle.

[0023] In one embodiment, the outer frame is provided with a water flow driving component, which has a driving surface. The driving surface is set at an angle relative to the circumference of the outer frame, so that the driving surface can drive the outer frame to rotate after being impacted by the water flow.

[0024] In one embodiment, the water flow driving component includes a mounting part and a driving body. The mounting part is mounted on the end of the outer frame near the water inlet. The driving body is conformally arranged to the inner peripheral wall of the outer frame. The driving body extends in a circumferential arc along the outer frame and has multiple baffles distributed at intervals. The driving surface is formed on the baffles.

[0025] In one embodiment, the pre-filter further includes a water distributor, which has a first water passage space and a second water passage space surrounding the first water passage space. One axial side of the water distributor is connected to the valve head, and the other axial side is connected to the filter module, such that the first water passage side is connected to the outlet through the first water passage space, and the second water passage side is connected to the inlet through the second water passage space. The second water passage space is provided with guide vanes that are relatively inclined to the axial direction.

[0026] In one embodiment, a water-sealing ring is provided between the water inlet and the water outlet of the valve head. The water inlet is connected to the outer circumference of the water-sealing ring, and the water outlet is connected to the inner circumference of the water-sealing ring. The water distributor and the water-sealing ring are inserted into each other and sealed together.

[0027] In one embodiment, the filter element has a cylindrical structure.

[0028] In one embodiment, the filter assembly is fixed to the filter bottle in the circumferential direction, and the outer frame is rotatably connected to the filter assembly.

[0029] The present invention also proposes a water system including the aforementioned pre-filter.

[0030] In the technical solution of this invention, the pre-filter has a flushing mode, which can periodically clean impurities attached to the filter assembly. Under the disturbance of the outer frame and impeller assembly, the flushed wastewater can effectively carry away impurities and discharge them through the drain port. Furthermore, the water flow path and flow rate into the mounting base can be increased through the first and second inlets, allowing the water flow to form a more complex flow pattern within the impeller cavity. This provides sufficient power for the rotation of the impeller body, enabling the outer frame and impeller body to move at a faster synchronous speed. This ensures the disturbance effect on the water flow within the filter cavity, preventing impurities from settling and thus ensuring the flushing effect of the pre-filter. Consequently, the filtration effect of the filter assembly is guaranteed, and the service life of the pre-filter is improved. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the external structure of an embodiment of the pre-filter provided by the present invention;

[0033] Figure 2 A schematic diagram of the external structure of a valve head of a pre-filter provided by the present invention;

[0034] Figure 3 This is a cross-sectional structural schematic diagram of an embodiment of the pre-filter provided by the present invention;

[0035] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0036] Figure 5 for Figure 3 A magnified view of a section at point B in the middle;

[0037] Figure 6 A schematic diagram of the assembly structure of the filter assembly and outer frame of a pre-filter provided by the present invention;

[0038] Figure 7 A schematic diagram of the structure of a filter assembly for a pre-filter provided by the present invention;

[0039] Figure 8 A schematic diagram of the structure of the exoskeleton of the pre-filter provided by the present invention from one perspective;

[0040] Figure 9 A schematic diagram of the structure of the exoskeleton of the pre-filter provided by the present invention from one perspective;

[0041] Figure 10 A schematic diagram of the structure of an embodiment of the exoskeleton of the pre-filter provided by the present invention from another perspective;

[0042] Figure 11 A schematic diagram of the structure of an embodiment of the impeller assembly of the pre-filter provided by the present invention;

[0043] Figure 12 for Figure 11 A schematic diagram of the impeller assembly from another perspective;

[0044] Figure 13 for Figure 11 A schematic diagram of the structure of the impeller body in an embodiment of the impeller assembly.

[0045] Explanation of icon numbers:

[0046] 10. Filter bottle; 101. Filter chamber; 102. Drain outlet;

[0047] 20. Valve head; 201. Inlet; 202. Outlet; 203. Water-proof ring;

[0048] 30. Filter assembly; 301. First water passage side; 302. Second water passage side;

[0049] 310. Filter module; 311. Support frame; 312. Filter element; 313. Connecting protrusion;

[0050] 320. Water distributor; 321. First water passage space; 322. Second water passage space; 323. Guide vane;

[0051] 40. Impeller assembly; 410. Mounting base; 402. First water inlet; 403. Second water inlet; 404. Drain outlet; 424. Water baffle ring;

[0052] 440. Impeller body; 441. Impeller shaft; 442. Impeller blades; 443. Flat section;

[0053] 50. Outer frame; 501. Siphon channel; 501a. Side wall channel; 501b. Bottom channel; 503. First discharge port; 504. Second discharge port;

[0054] 511. Chassis; 511a. Process notch; 512. Side frame; 514. Water baffle ring; 515. Flow channel groove; 516. Buckle; 517. Snap-fit ​​groove; 518. Connecting groove;

[0055] 520. Bottom cover; 521. Snap groove; 522. Cover fitting;

[0056] 530. Siphon component; 531. Siphon orifice;

[0057] 540. Water flow driving component; 541. Hanging part; 542. Driving body; 543. Water baffle; 544. Driving surface;

[0058] 60. Cleaning brush; 1001. Fasteners.

[0059] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0061] It should be noted that if the embodiments of the present invention 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.

[0062] Furthermore, if the embodiments of this invention 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. Thus, 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 invention.

[0063] 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 used to protect downstream water supply.

[0064] This invention proposes a pre-filter with a filtration mode and a flushing mode. In the filtration mode, the pre-filter can filter large particles before the water is used. In the flushing mode, the pre-filter can clean its internal filter components 30 to discharge the previously intercepted large particles, thus eliminating the need for manual disassembly and cleaning of the pre-filter and improving its service life.

[0065] Please see Figures 1 to 3 In one embodiment of the present invention, the pre-filter includes a valve head 20 and a filter bottle 10. The filter bottle 10 forms a water filtration chamber 101. The valve head 20 is provided with an inlet 201 and an outlet 202 communicating with the water filtration chamber 101. The filter bottle 10 is provided with a drain outlet 102 on the side away from the valve head 20.

[0066] The inlet 201 is connected to the water supply end of the water system, and the outlet 202 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 any specific limitations on these.

[0067] The valve head 20 and the filter bottle 10 can be connected by a threaded connection. For example, the valve head 20 has an externally threaded tube protruding from it, and the bottle mouth of the filter bottle 10 has an internal thread for the externally threaded tube to be screwed in. To reduce the production difficulty of the pre-filter and the inspection requirements of the assembly results, as well as to reduce the material cost of the valve head 20, in this embodiment, the filter bottle 10 and the valve head 20 are connected by a fastener 1001. The fastener 1001 can be a bolt, which locks the filter bottle 10 and the valve head 20 by the threaded engagement of the bolt and the through hole; the fastener 1001 can also be an assembly of a bolt and a nut, with the bolt passing through the through hole and being locked to the nut; the fastener 1001 can also be an assembly of a pin and a pin shaft, with the pin passing through the through hole and the pin shaft passing through the pin to lock the filter bottle 10 and the valve head 20.

[0068] The valve head 20 includes a connected metal outer shell and a plastic inner liner. Both the inlet 201 and outlet 202 are formed within the plastic inner liner. The metal outer shell of the valve head 20 and the filter bottle 10 are connected by fasteners 1001. Thus, the water flowing through the pre-filter directly contacts the plastic inner liner, not the metal outer shell, avoiding contamination from metal elements leached from the metal outer shell, while also ensuring the pre-filter has good aesthetics and shell strength. In other embodiments, the valve head 20 can also be directly configured as a metal component.

[0069] The materials of the metal outer shell and the plastic inner liner are not specifically limited in this application. 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 (polypropylene) or (polyvinyl chloride).

[0070] The pre-filter also includes a filter assembly 30 housed within the filtration chamber 101. Raw water (such as tap water or well water) flows into the inlet 201 from an external water source and passes through the filter assembly 30 for filtration. This filter assembly 30 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 30 are not limited; it can be equipped with a stainless steel filter screen or a cotton filter screen to filter impurities.

[0071] The pre-filter is typically a "T" shaped structure. The horizontal line at the top corresponds to the valve head 20, with the inlet 201 and outlet 202 at the left and right ends, respectively. The vertical line at the bottom is the filter bottle 10, with the drain outlet 102 located on the lower side of the filter bottle 10. The filter assembly 30 is located at the vertical line at the bottom.

[0072] In one embodiment, please refer to the following: Figure 3 and Figure 4 , Figure 6 and Figure 7The filter assembly 30 includes a filter module 310, which includes a support frame 311 and a filter element 312. The support frame 311 has a first water-passing side 301 located on one axial side and a second water-passing side 302 surrounding it in the circumferential direction. The filter element 312 is disposed on the second water-passing side 302. It can be understood that when water flows through the filter module 310, it will flow into one of the first water-passing side 301 and the second water-passing side 302, and then flow out from the other of the first water-passing side 301 and the second water-passing side 302. That is, the water will pass through the filter element 312, thereby being filtered by the filter element 312. Impurities are intercepted by the filter element 312, and the filtered water will flow to the user's water outlet through the outlet 202. Without loss of generality, when the front filter is in filtration mode, the inlet 201, the second water passage side 302, the first water passage side 301 and the outlet 202 will be distributed sequentially upstream and downstream. That is, the raw water entering from the inlet 201 will first flow into the inner periphery of the filter module 310 through the second water passage side 302, thereby being filtered by the filter element 312, and then flow out of the filter module 310 from the first water passage side 301 and flow to the outlet 202.

[0073] Specifically, the filter element 312 has a cylindrical structure, and the supporting frame 311 has a corresponding cylindrical structure. One side of the supporting frame 311 is open, and the other side is closed. The first water-passing side 301 is located on the open side of the supporting frame 311. Thus, the structure of the supporting frame 311 and the filter element 312 is simple, facilitating the processing and forming of the filter element 312 and the supporting frame, and allowing for easy installation of the filter assembly 30 within the water filtration chamber 101. Furthermore, both the supporting frame 311 and the filter element 312 are circumferentially continuous structures, ensuring structural strength and improving the filter assembly 30's resistance to water flow impact, thereby ensuring the service life of the filter assembly 30. Of course, the filter element 312 and the supporting frame 311 can also have other structural forms, such as a conical structure.

[0074] Optionally, the support frame 311 can be made of plastic. Firstly, plastic is less expensive than other materials such as metal, helping to reduce the manufacturing cost of the filter module 310. Secondly, plastic has good corrosion resistance to various chemicals, allowing for long-term use in various corrosive environments, reducing the frequency of damage and replacement of the filter module 310 due to corrosion. Thirdly, the low density of plastic reduces the overall weight of the support frame 311, facilitating installation, transportation, and maintenance. Fourthly, plastic has good processing properties, allowing for the fabrication of filter frames of various shapes and sizes through injection molding, extrusion, and other processes, facilitating the processing and shaping of the support frame 311. Of course, the invention is not limited to this; in other embodiments, the support frame 311 can also be made of metal.

[0075] Optionally, the filter element 312 may be made of metal. Metal materials are durable and stable, which can improve the service life of the filter element 312, thereby enabling it to effectively filter water flow for a longer period of time and reducing replacement frequency and cost. Of course, the present invention is not limited to this; in other embodiments, the filter element 312 may also be made of plastic.

[0076] In this embodiment, the filter element 312 is configured as a metal filter screen. The metal filter screen has a robust structure and can withstand certain pressure and impact, ensuring safety during use. Furthermore, the metal filter screen can be customized according to user needs, such as customizing non-standard sized equipment to meet the usage requirements under different support frames 311. Moreover, the metal filter screen is washable and easy to clean. Of course, the invention is not limited to this; in other embodiments, the filter element 312 can also be configured as a filter membrane.

[0077] Optionally, the filter element 312 and the support frame 311 are integrally injection molded. It should be noted that the filter element 312 is a metal part, while the support frame 311 is made of plastic. During production, the filter element 312 is first installed in the mold, and then the support frame 311 is formed through injection molding. In this way, the filter element 312 is welded to the surface of the plastic support frame 311 by the high temperature inside the mold, thus making the filter element 312 and the support frame 311 integrally injection molded. In the injection molding process, the filter element 312 is directly combined with the plastic support frame 311, avoiding secondary processing steps such as hot melting, welding, and riveting, thereby shortening assembly time and reducing production costs. Moreover, embedding the filter element 312 into the support frame 311 can improve the installation strength of the filter element 312, enabling it to withstand greater loads and impacts. Of course, the invention is not limited to this; in other embodiments, the filter element 312 and the support frame 311 can also be formed separately and then connected by bonding or welding.

[0078] In one embodiment, please refer to the following: Figure 3 and Figure 4 , Figure 6 and Figure 7 The pre-filter also includes a water distributor 320, which has a first water passage space 321 and a second water passage space 322 surrounding the first water passage space 321. One axial side of the water distributor 320 is connected to the valve head 20, and the other axial side is connected to the filter module 310, such that the first water passage side 301 is connected to the outlet 202 through the first water passage space 321, and the second water passage side 302 is connected to the inlet 201 through the second water passage space 322. The second water passage space 322 is provided with guide vanes 323 that are relatively inclined to the axial direction.

[0079] The water distributor 320 is connected to the filter module 310 and the valve head 20 on its two axial sides, respectively. In the flushing mode and the filtration mode of the pre-filter, the first water passage space 321 and the second water passage space 322 of the water distributor 320 will be connected to the corresponding structure mentioned above. That is, the pre-filter is a positive flushing filter. In the flushing mode and the filtration mode, the flow path of water into the filter component 30 does not change.

[0080] In filtration mode, the inlet 201 and outlet 202 are open, and the drain outlet 102 is closed. The water entering through the inlet 201 enters the filter chamber 101 through the second water passage 322, and then flows from the outer periphery of the filter assembly 30 through the second water passage of the filter assembly 30 into the inner periphery of the filter assembly 30. Thus, it can be filtered by the filter element 312, which intercepts impurities. The filtered water will flow through the first water passage 321 to the outlet 202.

[0081] In flushing mode, the inlet 201 and the outlet 102 are open, and the outlet 202 is closed. The water entering through the inlet 201 still enters the filter chamber 101 through the second water passage 322. After the water flows to flush the surface of the filter element 312, the sewage will be discharged through the outlet 102, thereby removing the previously intercepted impurities. This reduces the adhesion of impurities on the filter element 312, ensuring the filtration effect of the filter assembly 30 and improving the service life of the pre-filter.

[0082] The guide vanes 323 installed in the second water passage space 322 enable the water flow entering the filter chamber 101 to form a swirling flow, thereby disturbing the water flow and preventing impurities from settling. Especially in the flushing mode, it can better encapsulate impurities in the water flow, thus facilitating the discharge of impurities from the drain outlet 102 with the water flow.

[0083] Furthermore, a water-isolating ring 203 is provided between the inlet 201 and the outlet 202 of the valve head 20. The inlet 201 is connected to the outer circumference of the water-isolating ring 203, and the outlet 202 is connected to the inner circumference of the water-isolating ring 203. The water distributor 320 is inserted into the water-isolating ring 203 and sealed. Specifically, the water distributor 320 is inserted into the inner side of the water-isolating ring 203, and a sealing ring is fitted around the outer circumference of the water distributor 320. The outer circumference of the sealing ring abuts against the inner circumference of the water-isolating ring 203, thereby achieving a sealed fit between the two. In this way, the water distributor 320 and the water-isolating ring 203 can be stably connected, and there will be no leakage at the connection point. The raw water that has not been filtered by the filter element 312 and the purified water that has been filtered by the filter element 312 will not leak into each other, which helps to ensure the filtration effect of the pre-filter.

[0084] In one embodiment, please refer to Figures 3 to 6The pre-filter also includes an outer frame 50, which is rotatably fitted onto the filter assembly 30. This allows the outer frame 50 to rotate, disturbing the water flow within the filtration chamber 101 and preventing impurities from depositing and adhering to the sidewalls of the filter assembly 30, the outer frame 50, and the filtration chamber 101. This reduces the likelihood of clogging in the filter assembly 30, thereby ensuring its filtration efficiency. In this embodiment, the outer frame 50 includes a side frame 512 and a base 511. The base 511 is connected to the side frame 512 on the side furthest from the valve head 20, providing strong structural stability and smooth rotation. Of course, in other embodiments, the outer frame 50 may only include the side frame 512 structure.

[0085] In one embodiment, please refer to Figure 8 The side frame 512 is equipped with a water flow drive component 540, which has a drive surface 544. The drive surface 544 is set at an angle relative to the circumference of the outer frame 50, so that the drive surface 544 can drive the outer frame 50 to rotate after being impacted by the water flow. Thus, when the drive surface 544 is driven by the water flow, the water flow drive component 540 can generate a driving force on the outer frame 50 in the circumference, thereby causing the outer frame 50 to rotate around its axial direction, that is, around the axial direction of the filter assembly 30. This allows the kinetic energy of the water flow to be converted into the kinetic energy of the rotation of the outer frame 50 through the drive surface 544, thereby realizing the rotation of the outer frame 50. This disturbs the water flow in the filter chamber 101, preventing impurities from depositing and adhering to the side walls of the filter assembly 30, the outer frame 50, and the filter chamber 101, reducing the possibility of clogging of the filter assembly 30, and thus improving the filtration effect of the filter assembly 30. Furthermore, the water flow can form a swirling flow after passing through the water distributor 320, thereby providing a greater driving force through the drive surface 544. That is, the water distributor 320, in conjunction with the water flow drive component 540, can provide a certain rotational driving force to the outer frame 50. The impeller body 440 itself rotates due to the impact of the water flow and is linked to the outer frame 50, which can also provide a certain rotational driving force to the outer frame 50. Moreover, these two rotational driving forces are arranged in the same direction.

[0086] In one embodiment, the water flow drive component 540 is snapped onto the end of the side frame 512. The water flow drive component 540 is connected to the end of the side frame 512 via a snap-fit ​​mechanism, enabling separate molding of the side frame 512 and the water flow drive component 540, improving molding probability and convenience. The snap-fit ​​connection between the side frame 512 and the water flow drive component 540 facilitates the connection operation, and also allows the water flow drive component 540 to remain stable at the end of the side frame 512, thereby improving production efficiency. Of course, in other embodiments, the water flow drive component 540 can also be connected to the side frame 512 via screwing, melting, or integral molding; alternatively, the water flow drive component 540 can be snapped onto the axial center of the side frame 512.

[0087] Specifically, in this embodiment, the side frame 512 is provided with a plurality of water flow driving components 540, which are spaced apart along the circumference of the outer frame 50. It can be understood that the plurality of water flow driving components 540 are spaced apart at the ends of the side frame 512 around the circumference of the outer frame 50. Thus, the plurality of driving surfaces 544 distributed in the circumferential direction of the outer frame 50 tend to be uniform, thereby balancing the driving force on the outer frame 50 in the circumferential direction, enabling the outer frame 50 to rotate at a uniform speed, ensuring the cleaning effect on the filter assembly 30. Without loss of generality, in this embodiment, the water flow driving component 540 is provided with a plurality of driving surfaces 544, which are uniformly distributed along the circumference of the outer frame 50. The plurality of water flow driving components 540 are also uniformly distributed in the circumferential direction of the side frame 512, thereby ensuring the uniform distribution of the driving surfaces 544 in the circumferential direction of the side frame 512, and thus ensuring the rotational stability of the outer frame 50. Of course, in other embodiments, multiple water flow drive elements 540 may also be distributed along the axial direction of the side frame 512 to balance the rotational stability of the outer frame 50 in the axial direction.

[0088] Regarding the engagement relationship between the water flow drive component 540 and the side frame 512, in this embodiment, the water flow drive component 540 includes a hook-on portion 541, which hooks onto the end of the side frame 512 and engages with it. It can be understood that the water flow drive component 540 hooks onto the side frame 512 axially from its end, facilitating a convenient and stable connection. After the hook-on portion 541 hooks onto the side frame 512, the water flow drive component 540 engages with it. This engagement can occur either with the hook-on portion 541 or with other parts of the water flow drive component 540. This hook-on connection provides a positioning reference for the connection between the water flow drive component 540 and the side frame 512, simplifying the connection process. Furthermore, after the mounting part 541 is mounted on the side wall, it limits the water flow drive member 540 in the radial direction, preventing the water flow drive member 540 from moving radially relative to the side frame 512. Of course, in other embodiments, the water flow drive member 540 can also be snapped onto the side wall by insertion or by a knob.

[0089] The water flow drive component 540 also includes a drive body 542 connected to the mounting portion 541. The drive body 542 is mounted on the inner side of the side frame 512, and the mounting portion 541 engages with the outer side of the side frame 512. A drive surface 544 is formed on the drive body 542. Without loss of generality, the gap between the outer frame 50 and the housing is small, while the gap between the outer frame 50 and the filter assembly 30 is large, to ensure the efficiency of water flow filtration through the filter assembly 30. Thus, by positioning the drive body 542 with the drive surface 544 on the inner side of the side frame 512, the tension between the side wall of the filter chamber 101 and the water flow is prevented from affecting the impact force of the water flow on the drive surface 544, thereby ensuring the rotational stability and reliability of the outer frame 50. Furthermore, since the driving surface 544 is located on the driving body 542, the driving body 542 inevitably maintains good flatness in the circumferential direction of the side frame 512. Positioning the driving body 542 inside the side frame 512 ensures the flatness of the outer side of the outer frame 50, preventing interference from the housing with the rotation of the outer frame 50, and ensuring sufficient water flow impact on the driving surface 544. Simultaneously, the hook part 541 is engaged on the outer side of the side frame 512, and the driving body 542 is located inside the side frame 512, balancing the force on the water flow driving member 540 in the inward and outward directions of the side frame 512, thereby ensuring the connection stability between the water flow driving member 540 and the side frame 512. Of course, in other embodiments, when the gap between the side frame 512 and the cavity wall of the filter chamber 101 is large, the driving body 542 can also be positioned on the outer side of the side frame 512.

[0090] In one embodiment, the driving surface 544 is parallel to the axial direction of the outer frame 50. It can be understood that the driving surface 544 is distributed circumferentially on the side frame 512, similar to the arrangement of the guide vanes 323 in the water distributor 320. The guide vanes 323 guide the water flow to impact the driving surface 544. Alternatively, a flow-guiding structure can be provided on the channel wall between the inlet 201 and the water flow drive 540 to guide the water flow in a vortex shape along the axial direction of the filter assembly 30. This allows the water flow drive 544, which is parallel to the axial direction of the outer frame 50, to directly impact the driving surface 544, thereby providing the water flow drive 540 with a greater water flow impact force. This increases the rotational speed or efficiency of the outer frame 50, prevents impurities from adhering to the filter assembly 30, ensures the cleanliness of the filter assembly 30, and improves the filtration efficiency of the filter assembly 30. Of course, in other embodiments, the driving surface 544 can also be inclined relative to the axial direction of the outer frame 50, or radially inclined relative to the side frame 512.

[0091] In one embodiment, the drive body 542 extends in a circumferential arc along the side frame 512 and is provided with a plurality of baffles 543 at intervals. A drive surface 544 is formed on the baffles 543. Without loss of generality, the baffles 543 protrude from the drive body 542, and the drive surface 544 is formed on the sidewall of the baffles 543 along the circumferential direction of the side frame 512, so that the drive surface 544 can have a certain size in the radial direction, ensuring that the drive surface 544 is stably impacted by the water flow. At the same time, the drive body 542 extends in a circumferential arc along the inner circumference of the side frame 512, and the plurality of baffles 543 are distributed at intervals in the extension direction of the drive body 542, so as to evenly distribute the driving force in the circumferential direction of the side frame 512, ensuring the stability of the rotation of the outer frame 50. Furthermore, the drive body 542 is conformally arranged to the inner peripheral wall of the side frame 512, and the two fit tightly together. When the drive body 542 is subjected to force, the inner wall of the side frame 512 can provide sufficient and stable support for the drive body 542, thereby effectively pulling the side frame 512 to rotate. This avoids shaking between the water flow drive component 540 and the side frame 512, which would lead to energy waste, ensuring the rotation efficiency of the outer frame 50 and improving the cleaning effect on the filter assembly 30. Of course, in other embodiments, the drive body 542 may also have a recessed drive groove, and the side wall of the drive groove may be configured as a drive surface 544.

[0092] In one embodiment, please refer to the following: Figure 3 , Figure 5 , Figures 11 to 13 The pre-filter also includes an impeller assembly 40, which includes a mounting base 410 fixedly installed in the water filtration chamber 101 and an impeller body 440 rotatably installed in the mounting base 410. The impeller body 440 and the outer frame 50 are coaxially connected and fixed in the circumferential direction. The mounting base 410 includes a first inlet 402 on one axial side, a second inlet 403 on the circumferential side, and a drain outlet 404 on the other axial side. The first inlet 402 and the second inlet 403 are both connected to the drain outlet 404. It is understood that the mounting base 410 is located in the water filter chamber 101. The first water inlet 402, the second water inlet 403, and the drain outlet 404 can all be connected to the water filter chamber 101. The drain outlet 404 will be located on the side close to the sewage outlet 102, and can be downstream of the first water inlet 402 and the second water inlet 403. The water flowing into the water filter chamber 101 from the water inlet 201 can flow through the first water inlet 402, the second water inlet 403, and the drain outlet 404 in sequence, pass through the impeller assembly 40, and finally flow to the sewage outlet 102.

[0093] Without loss of generality, the mounting base 410 is fitted with a sealing ring, which seals the inner circumferential wall of the filter bottle 10. The first inlet 402 and the second inlet 403 are located on one axial side of the sealing ring and are close to the inlet 201. The drain outlet 404 is located on the other axial side of the sealing ring and is close to the drain outlet 102. In this way, the inlet and outlet sides of the mounting base 410 are separated externally by the sealing ring, so that the first inlet 402 and the second inlet 403 can only be connected through the internal space of the mounting base 410. That is, when the water flows through the mounting base 410, it will enter the internal space of the mounting base 410 and drive the impeller body 440 to rotate.

[0094] Therefore, when the outer frame 50 is equipped with a water flow drive component 540, on the one hand, the outer frame 50 can be driven by the swirling flow generated by the water distributor 320 under the action of the water flow drive component 540, causing it to rotate. The rotation of the outer frame 50 can also drive the impeller body 440 to rotate. The impeller body 440 can thus disturb the water flow entering the internal space of the mounting base 410, preventing impurities from being deposited in the internal space of the mounting base 410. On the other hand, after the water flow enters the internal space of the mounting base 410, it acts on the blades of the impeller body 440, providing driving force for the rotation of the impeller body 440, which in turn drives the outer frame 50 to rotate. In this way, the rotation of the outer frame 50 and the impeller body 440 can promote each other, thereby ensuring the disturbance effect on the water flow inside the filter chamber 101, minimizing the deposition of impurities, and ensuring the flushing effect of the pre-filter. Of course, when only the impeller assembly 40 is set, the outer frame 50 is driven to rotate by the impeller body 440, which also helps to avoid the deposition of impurities, thereby ensuring the rinsing effect of the pre-filter.

[0095] Without loss of generality, please refer to Figure 13 The impeller body 440 includes an impeller shaft 441 and multiple impeller blades 442 inclinedly disposed on the impeller shaft 441. Water flow from the first inlet 402 and the second inlet 403 can cause the impeller blades 442 to drive the impeller shaft 441 to rotate. Specifically, one side of the impeller blade 442 is curved into an arc surface, with a portion of the arc surface facing the first inlet 402 and the other portion facing the second inlet 403. Thus, the impeller blade 442 can be driven to rotate by the combined action of water flow from the side second inlet 403 and the top first inlet 402. In this way, by increasing the water flow path and flow rate into the mounting base 410 through the first inlet 402 and the second inlet 403, and by providing multiple inlets, a more complex flow pattern can be formed within the impeller cavity, providing sufficient power for the rotation of the impeller body 440.

[0096] In one embodiment, please refer to the following: Figure 3 , Figure 5 , Figures 8 to 13 The outer frame 50 forms a siphon channel 501 and is provided with a siphon hole 531 and a first discharge port 503 connecting the siphon channel 501. The first discharge port 503 is connected to at least one of the first water inlet 402 and the second water inlet 403. Thus, in the flushing mode, when impurities and particles intercepted by the filter assembly 30 are impacted and dislodged by the water flow, they can be drawn into the siphon hole 531 and the siphon channel 501 by siphon action, and flow more efficiently through the first discharge port 503 to the impeller assembly 40, and finally discharged to the drain port 102. That is, in the flushing mode, impurities and particles intercepted by the filter assembly 30 can be more effectively and quickly guided to the drain port 102 and finally discharged through the drain port 102, thereby improving the flushing effect on the filter chamber 101, especially the filter assembly 30.

[0097] Specifically, the siphon channel 501 includes a connected side wall channel 501a and a bottom channel 501b. The side wall channel 501a is provided corresponding to the side frame 512, and the bottom channel 501b is provided with siphon holes 531 corresponding to the chassis 511. Multiple siphon holes are distributed at intervals along the extension direction of the side wall channel 501a. The first discharge port 503 is located at the end of the bottom channel 501b, that is, at the end away from the side wall channel 501a.

[0098] The sidewall flow channel 501a can be formed by the side frame 512 itself; or it can be a part with a separate sidewall flow channel 501a. In this embodiment, the siphon member 530 constituting the sidewall flow channel 501a and the side frame 512 together form the sidewall flow channel 501a. The number of siphon members 530 corresponds to the number of siphon flow channels 501, and the siphon holes 531 are provided on the siphon members 530.

[0099] Reference Figure 4 There are various ways to fix the siphon component 530 to the side frame 512, such as locking the siphon component 530 to the side frame 512; however, this is not convenient during installation or maintenance. In this embodiment, for convenient and secure installation, the siphon component 530 and the side frame 512 can be assembled and snapped together through the cooperation of slide rails and slide channels, making it easier for the siphon component 530 to be inserted and fixed to the side frame 512, and also facilitating disassembly, thus improving the convenience of operation.

[0100] In one embodiment, the outer frame 50 further includes a bottom cover 520, which, together with the chassis 511, forms the bottom flow channel 501b. Thus, the bottom flow channel 501b is formed by assembling the separately molded bottom cover 520 and chassis 511, facilitating the processing and molding of the bottom flow channel 501b, improving production convenience, and ensuring a high yield rate. Alternatively, in other embodiments, the bottom flow channel 501b can be molded as a separate part and then installed into the slot of the chassis 511.

[0101] To facilitate the installation of the bottom cover 520 and the chassis 511, the chassis 511 is provided with a protruding flow channel 515. The flow channel 515 is open upwards, and its opening communicates with the side wall flow channel 501a. The bottom of the flow channel 515, opposite to its opening, extends to the center of the chassis 511. The bottom cover 520 engages with the flow channel 515 and seals it, forming the bottom flow channel 501b. The design of the flow channel 515 enhances the connection stability between the chassis 511 and the bottom cover 520, making the entire outer frame 50 structure more stable and less prone to loosening or deformation. The upward-opening design of the flow channel 515 makes the installation of the bottom cover 520 more convenient. Users can easily engage the bottom cover 520 with the flow channel 515 without complicated operations to complete the formation of the bottom flow channel 501b.

[0102] Reference Figure 9 To ensure stability, the bottom cover 520 is fitted with a flow channel 515. A snap fastener 516 is provided on the outer wall of the flow channel 515, and the bottom cover 520 has a corresponding snap groove 521. The bottom cover 520 is fixed to the base 511 by the snap fastener 516 and the snap groove 521 engaging. This stability is further enhanced by the design of the snap fastener 516 and the snap groove 521. The tight fit between the snap fastener 516 and the snap groove 521 prevents the bottom cover 520 from loosening or falling off during use due to water flow impact or external force. The design of the snap fastener 516 and the snap groove 521 places higher demands on installation precision, which helps ensure that the bottom cover 520 is accurately aligned and fixed with the flow channel 515 during installation, avoiding sealing problems or structural instability caused by improper installation. The design of the snap fastener 516 and the snap groove 521 makes the disassembly and installation of the bottom cover 520 simpler and faster.

[0103] Reference Figure 3For ease of manufacturing, snap fasteners 516 are located on opposite sides of the runner groove 515. The chassis 511 has a through-hole notch 511a corresponding to the snap fasteners 516. After the bottom cover 520 is closed with the chassis 511, the bottom cover 520 blocks the through-hole notch 511a. By setting snap fasteners 516 on opposite sides of the runner groove 515 and correspondingly opening the through-hole notch 511a on the chassis 511, the mold design and manufacturing process are simplified. The through-hole notch 511a makes it easier to form the snap fastener 516 structure in manufacturing processes such as injection molding or stamping, reducing manufacturing costs and difficulty. Although the opening of the through-hole notch 511a may seem to weaken the local strength of the chassis 511, through reasonable design and the blocking by the bottom cover 520, it does not actually have a significant impact on the overall structural strength. At the same time, the snap fasteners 516, located on opposite sides of the runner groove 515, can more effectively disperse and resist external forces, maintaining structural stability. The process notch 511a is completely concealed after the bottom cover 520 and chassis 511 are closed, and will not affect the aesthetic appearance of the pre-filter. This helps to improve the overall image of the product and the user's visual experience. The design of the clip 516 retains the characteristics of easy disassembly and easy installation, making the maintenance of the bottom cover 520 simple and quick. Users can easily disassemble and install the bottom cover 520 when performing operations such as cleaning or replacing the filter assembly 30.

[0104] Specifically, multiple siphon channels 501 are spaced apart circumferentially along the outer frame 50. First discharge ports 503 correspond to the number of siphon channels 501 and are connected to a bottom channel 501b. To ensure drainage, each bottom channel 501b has a corresponding first discharge port 503. To simplify installation and facilitate connection between the bottom cover 520 and the chassis 511, the bottom cover 520 is integrally formed with multiple covering parts 522. Each covering part 522 and the chassis 511 enclose a bottom channel 501b. By designing multiple covering parts 522 connected to the chassis 511, each covering part 522 and the chassis 511 enclosing a bottom channel 501b, the connection between the bottom cover 520 and the chassis 511 becomes more convenient and accurate.

[0105] Each siphon channel 501 has an independent first discharge port 503. To ensure smooth drainage, the first discharge ports 503 are all inclined in the same direction from the upper surface of the chassis 511 downwards. The inclined first discharge ports 503 guide the water flow out more smoothly, reducing water stagnation and eddies in the bottom channel 501b. This helps prevent impurities from accumulating in the bottom channel 501b, keeping the pre-filter clean and operating efficiently. The first discharge ports 503 are inclined clockwise or counterclockwise along the axial direction. The inclined first discharge ports 503 also have a certain anti-backflow function and can also make the drainage form a swirling flow. The efficient bottom channel 501b and first discharge port 503 design allows the pre-filter to discharge impurities and sewage more quickly, improving the filtration effect and the overall performance of the system. To avoid water interference, the first discharge ports 503 are all located at the end of the bottom channel 501b.

[0106] Reference Figure 8 and Figure 9 The chassis 511 is also provided with a second discharge port 504 that runs through the axial direction. In the filter flushing mode, the wastewater after cleaning the filter assembly 30 can be drawn into the siphon channel and discharged to the sewage outlet 102 through the first discharge port 503, and can also be discharged to the sewage outlet 102 through the second discharge port 504. This helps to speed up the water flow and improve the sewage discharge efficiency.

[0107] The chassis 511 may be provided with multiple second discharge ports 504. These second discharge ports 504 can be evenly distributed or strategically arranged as needed to maximize drainage efficiency. Specifically, multiple second discharge ports 504 are provided, located between two adjacent siphon channels 501 and closer to the outer periphery of the chassis 511 relative to the first discharge port 503. Arranging the second discharge ports 504 symmetrically with the first discharge port 503 ensures that the entire outer frame 50 is evenly subjected to water flow impact and water supply flow, which helps to disperse drainage pressure, improve drainage efficiency, and ensure the structural strength of the outer frame 50.

[0108] In one embodiment, please refer to the following: Figures 8 to 11 The outer frame 50 and the mounting base 410 have water-blocking structures formed on opposite sides. The water-blocking structures are arranged around the first discharge port 503, and the second discharge port 504 is located on the outer periphery of the water-blocking structures to communicate with the second water inlet 403.

[0109] Specifically, the bottom of the outer frame 50 is provided with a water-blocking ring 514, and the mounting base 410 is provided with a water-blocking ring 424. The water-blocking ring 514 and the water-blocking ring 424 cooperate to form a water-blocking structure. The siphon channel 501 and the first inlet 402 are connected within the inner circumference of the water-blocking structure. The filter chamber 101 on the outer circumference of the filter assembly 30 is connected to the second inlet 403 on the outer circumference of the water-blocking structure through the second discharge port 504. Furthermore, the mounting base 410 has second inlets 403 on both opposite sides. Water in the filter bottle 10, except for the siphon channel 501, can enter through these two second inlets 403 during sewage discharge. The mounting base 410 is designed with four first inlets 402 that are inclined in the same direction. Water flowing out of the siphon channel 501 enters the inner cavity of the mounting base 410 through the first inlets 402. In this way, the water inlet paths of the two inlets of the impeller assembly 40 can be separated by the water-blocking structure, so that they do not interfere with each other. This can prevent excessive water flow from other locations from entering the first inlet 402 at the top of the mounting base 410, thereby ensuring the adsorption capacity of the siphon channel 501.

[0110] In one embodiment, the filter assembly 30 is fixedly installed within the water filtration chamber 101 to enable stable filtration. Specifically, the filter assembly 30 includes a filter module 310 and a water distributor 320 fixedly connected axially. The water distributor 320 has multiple spaced fixing protrusions on its outer periphery, which correspondingly engage with multiple fixing grooves on the inner peripheral wall of the filter bottle 10, thus fixing the filter assembly 30 to the filter bottle 10 in the circumferential direction. Furthermore, the water distributor 320 has a stepped structure. When the water distributor 320 is inserted into the water-separating ring 203, it also abuts against the end face of the water-separating ring 203 through the stepped structure, thereby limiting one axial side of the filter assembly 30. Even further, the outer frame 50 is rotatably connected to the filter assembly 30. Thus, the filter assembly 30 and the outer frame 50 have a connection and fit, which helps to ensure the rotational stability of the outer frame 50. At the same time, the other side of the filter assembly 30 in the axial direction will also be limited by the outer frame 50, so that the filter assembly 30 can also remain fixed relative to the filter bottle 10 in the axial direction.

[0111] It is understood that the filter assembly 30 and the impeller assembly 40 will be located on opposite sides of the chassis 511. Without loss of generality, the support frame 311 is rotatably connected to one side of the chassis 511, and the impeller body 440 is connected to the other side of the chassis 511. Specifically, the chassis 511 has a connecting groove 518, the support frame 311 has a connecting protrusion 313, the connecting protrusion 313 is rotatably inserted into the connecting groove 518, one end of the impeller shaft 441 has a flat part 443, and the chassis 511 has a corresponding snap-fit ​​groove 517, the flat part 443 is adapted to snap into the snap-fit ​​groove 517. In this way, the rotatable connection between the support frame 311 and the outer frame 50, as well as the transmission engagement between the impeller body 440 and the outer frame 50, can be realized. When the chassis 511 is covered with a bottom cover 520, the bottom cover 520 is provided with a clearance groove corresponding to the connecting groove 518, so that the connecting groove 518 can be exposed for the connecting protrusion 313 to connect.

[0112] In one embodiment, please refer to Figure 6 and Figure 8 The side frame 512 is also equipped with a cleaning structure, which is staggered from the siphon channel 501. Multiple sets of cleaning structures can also be arranged circumferentially to clean at least one of the inner circumferential wall of the filter bottle 10 and the outer circumferential side of the filter module 310. In the flushing mode, in conjunction with the rotation of the outer frame 50, the cleaning structure can sweep off impurities from the relevant structures, allowing them to detach and be discharged with the water flow. This prevents severe clogging of the filter assembly 30, ensuring the filtration effect of the filter assembly 30 and improving the service life of the pre-filter.

[0113] In one embodiment, please refer to Figure 6 and Figure 8 The inner peripheral wall of the outer frame 50 is provided with a cleaning brush 60, which is arranged at an inclination relative to the radial direction of the outer frame 50 in the direction from the outside to the inside. It is understood that the end of the cleaning brush 60 should abut against the filter element 312. The inclined cleaning brush 60 facilitates the spread of the bristles, allowing the cleaning brush 60 to have a sufficiently large contact area with the filter element 312 in the axial direction, thus ensuring the coverage of the filter element 312 by the cleaning brush 60 in the axial direction. In the circumferential direction, the outer frame 50 can rotate to drive the cleaning brush 60 to thoroughly clean the circumference of the filter element 312. In this way, the cleaning effect of the cleaning brush 60 on the filter element 312 can be guaranteed, thereby ensuring the flushing effect of the pre-filter, improving the service life of the filter assembly 30, and ensuring the filtration effect of the filter assembly 30. At the same time, it can reduce the friction between the cleaning brush 60 and the filter element 312 when the outer frame 50 rotates relative to the filter assembly 30, thus ensuring that the cleaning brush 60 can clean the filter element 312 in the circumferential direction.

[0114] In one embodiment, multiple cleaning brushes 60 are distributed along the axial direction of the outer frame 50. This facilitates the cleaning brushes 60 covering the filter element 312 along its axial direction, thereby ensuring the cleaning effect of the cleaning brushes 60 on the filter element 312. Of course, only one cleaning brush 60 can be distributed along the same axial direction to achieve axial coverage of the filter element 312, or multiple cleaning brushes 60 distributed circumferentially at intervals and staggered axially can also achieve axial coverage of the filter element 312.

[0115] In one embodiment, in a group of cleaning brushes 60 distributed along the same axial direction, adjacent cleaning brushes 60 extend in different directions along the axial direction of the outer frame 50. That is, adjacent cleaning brushes 60 can extend obliquely close to each other or obliquely away from each other, and these two mating relationships are alternately distributed along the axial direction, which facilitates the cleaning brushes 60 covering the filter element 312 along the axial direction, thereby ensuring the cleaning effect of the cleaning brushes 60 on the filter element 312. Furthermore, in a group of cleaning brushes 60 distributed along the same axial direction, adjacent cleaning brushes 60 are set at an acute angle, which can balance the axial coverage of the filter element 312 by the cleaning brushes 60 and ensure that the cleaning brushes 60 have sufficient length to ensure the amount of wear during the brushing process, thereby improving the service life of the cleaning brushes 60. Of course, in other embodiments, the cleaning brushes 60 can also be installed on the outer frame 50 in other states.

[0116] This invention also proposes a water system including 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 possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon 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.

[0117] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any 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 within the patent protection scope of the present invention.

Claims

1. A pre-filter, characterized in that, include: The valve head and filter bottle are provided, wherein the filter bottle forms a water filtration chamber, the valve head is provided with an inlet and an outlet that communicate with the water filtration chamber, and the filter bottle is provided with a drain outlet on the side away from the valve head. A filter assembly is fixedly installed in the water filtration chamber. The filter assembly includes a filter module, which includes a support frame and a filter element. The support frame has a first water passage side located on one side of the axial direction and a second water passage side surrounding it in the circumferential direction. The filter element is disposed on the second water passage side. An outer frame is located inside the water filtration chamber and is rotatably fitted onto the outside of the filter assembly; An impeller assembly includes a mounting base fixedly installed in the water filter chamber and an impeller body rotatably installed on the mounting base. The impeller body and the outer frame are coaxially connected and fixed in the circumferential direction. The mounting base includes a first water inlet on one axial side, a second water inlet on the circumferential side, and a drain outlet on the other axial side. The outer frame includes a side frame and a chassis. The chassis is connected to the side frame on the side away from the valve head. The outer frame forms a siphon channel. The siphon channel includes a side wall channel and a bottom channel communicating with the side wall channel. The side wall channel is arranged corresponding to the side frame and has siphon holes facing the filter assembly. The bottom channel is arranged corresponding to the chassis and has a first discharge port. The chassis is provided with a second discharge port that runs through the axis. The outer frame and the mounting base are provided with a water-blocking structure on opposite sides. The water-blocking structure is arranged around the first discharge port. The second discharge port is located on the outer periphery of the water-blocking structure. The first discharge port is connected to the first water inlet. The second discharge port is connected to the second water inlet.

2. The pre-filter as described in claim 1, characterized in that, The outer frame also includes a bottom cover, which, together with the chassis cover, forms the bottom flow channel.

3. The pre-filter as described in claim 2, characterized in that, The bottom cover is located on the side of the chassis near the filter assembly, and the filter assembly is rotatably connected to the bottom cover. The first discharge port is located on the chassis.

4. The pre-filter as described in claim 2, characterized in that, The bottom cover is detachably connected to the chassis.

5. The pre-filter as described in claim 2, characterized in that, The chassis has a protruding flow channel groove, which is open on the side facing the filter assembly. The flow channel groove is connected to the side wall flow channel and extends to the center of the chassis. The bottom cover engages with the flow channel groove and seals the opening of the flow channel groove to form the bottom flow channel.

6. The pre-filter as described in claim 5, characterized in that, The bottom cover covers the flow channel groove, and the outer wall of the flow channel groove is provided with a buckle. The bottom cover is provided with a buckle groove corresponding to the buckle. The bottom cover is fixed to the chassis by the buckle and the buckle groove engaging.

7. The pre-filter as described in claim 6, characterized in that, Each of the two sides of the flow channel is provided with a buckle, and the chassis is provided with a process notch that passes through the chassis corresponding to the buckle. After the bottom cover is closed with the chassis, the bottom cover covers the process notch.

8. The pre-filter as described in claim 2, characterized in that, The sidewall flow channels are provided at multiple intervals along the circumference of the side frame, and the bottom cover includes multiple covering parts. One of the covering parts and the chassis enclose a bottom flow channel, and the bottom flow channel is correspondingly connected to a sidewall flow channel.

9. The pre-filter as described in claim 1, characterized in that, A cleaning structure is installed on the outer frame for cleaning the inner peripheral wall of the filter bottle and at least one of the filter elements.

10. The pre-filter as claimed in claim 1, characterized in that, The inner peripheral wall of the outer frame is provided with a cleaning brush, which is arranged at an inclination relative to the radial direction of the outer frame in the direction from the outside to the inside.

11. The pre-filter as claimed in claim 10, characterized in that, The cleaning brushes are distributed in multiples along the axial direction of the outer frame.

12. The pre-filter as described in claim 11, characterized in that, The two adjacent cleaning brushes extend in different directions along the axial direction of the outer frame.

13. The pre-filter as described in claim 12, characterized in that, The two adjacent cleaning brushes are set at an acute angle.

14. The pre-filter as claimed in claim 1, characterized in that, The outer frame is equipped with a water flow driving component, which has a driving surface. The driving surface is set at an angle relative to the circumference of the outer frame, so that the driving surface can drive the outer frame to rotate after being impacted by the water flow.

15. The pre-filter as described in claim 14, characterized in that, The water flow driving component includes a mounting part and a driving body. The mounting part is mounted on the end of the outer frame near the water inlet. The driving body is conformally arranged to the inner peripheral wall of the outer frame. The driving body extends in a circumferential arc along the outer frame and has multiple baffles distributed at intervals. The driving surface is formed on the baffles.

16. The pre-filter as claimed in claim 1, characterized in that, The pre-filter also includes a water distributor, which has a first water passage space and a second water passage space surrounding the first water passage space. One axial side of the water distributor is connected to the valve head, and the other axial side is connected to the filter module, so that the first water passage side is connected to the outlet through the first water passage space, and the second water passage side is connected to the inlet through the second water passage space. The second water passage space is provided with guide vanes that are relatively inclined to the axial direction.

17. The pre-filter as described in claim 16, characterized in that, The valve head is provided with a water-proof ring between the water inlet and the water outlet. The water inlet is connected to the outer circumference of the water-proof ring, and the water outlet is connected to the inner circumference of the water-proof ring. The water distributor and the water-proof ring are inserted into each other and sealed together.

18. The pre-filter as claimed in claim 1, characterized in that, The filter element has a cylindrical structure; And / or, the filter assembly is fixed to the filter bottle in the circumferential direction, and the outer frame is rotatably connected to the filter assembly.

19. A water supply system, characterized in that, Includes the pre-filter as described in any one of claims 1 to 18.

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