Pre-filter and water system

Abstract

The invention discloses a pre-filter and a water system, and relates to the technical field of filters. Wherein the pre-filter comprises a valve head, a filter bottle, a filter assembly, an outer framework and an impeller assembly, the outer framework is rotatably arranged outside the filter assembly in a sleeving manner, and the impeller assembly comprises a mounting seat fixedly mounted in the water filtering cavity and an impeller body rotatably mounted on the mounting seat; the impeller body and the outer framework are coaxially connected and fixed in the circumferential direction, and the mounting base comprises a first water inlet formed in one axial side, a second water inlet formed in the circumferential side and a water outlet formed in the other axial side. The technical scheme provided by the invention has the technical effects that the filtering effect of the filtering assembly is ensured, and the service life of the pre-filter is prolonged.

Description

Technical Field

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

[0002] As people's living standards continue to improve, the requirements for daily water use are getting higher and higher. Due to long-term disrepair and aging of the tap water pipes, there are a large number of large particles in the water that are harmful to the human body, such as mud, rust, and red worms, which seriously affect the health of residents' water use. Therefore, a pre-filter is set up, and the pre-filter is equipped with components such as a filter assembly, which can filter large particles before the tap water is used at the faucet. However, while the pre-filter is filtering the water, impurities will adhere to the filter cavity, especially the surface of the filter assembly, which will clog the filter assembly over time and reduce the filtering effect of the filter assembly. Summary of the invention

[0003] The main purpose of the present invention is to provide a pre-filter and a water-using system, aiming to ensure the filtering effect of the filtering component and to increase the service life of the pre-filter.

[0004] To achieve the above object, the pre-filter proposed by the present invention comprises:

[0005] A valve head and a filter bottle, wherein the filter bottle is formed with a water filter cavity, the valve head is provided with a water inlet and a water outlet connected to the water filter cavity, and a sewage outlet is provided on a side of the filter bottle away from the valve head;

[0006] A filter assembly is fixedly installed in the water filter cavity, the filter assembly includes a filter module, the filter module includes a support frame and a filter element, the support frame has a first water pass side located on one side in the axial direction and a second water pass side surrounding in the circumferential direction, and the filter element is arranged on the second water pass side;

[0007] An outer frame is arranged in the water filter cavity and is rotatably sleeved outside the filter assembly;

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

[0009] In one embodiment, the exoskeleton includes a side frame and a chassis, the chassis is connected to the side frame and is located on a side away from the valve head, the exoskeleton forms a siphon flow channel, the siphon flow channel includes a side wall flow channel and a bottom flow channel connected to the side wall flow channel, the side wall flow channel is arranged corresponding to the side frame, the side wall flow channel is provided with a siphon hole facing the filter assembly, the bottom flow channel is arranged corresponding to the chassis and is provided with a first discharge port, and the first discharge port is connected to at least one of the first water inlet and the second water inlet.

[0010] In one embodiment, the outer frame further includes a bottom cover, and the bottom cover is combined with the bottom plate to form the bottom flow channel.

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

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

[0013] In one embodiment, the chassis is provided with a flow groove, which is open on the side facing the filter assembly, and is connected to the side wall flow channel. The flow groove extends to the center of the chassis, and the bottom cover is snap-fitted with the flow groove and seals the opening of the flow 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.

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

[0016] In one embodiment, a plurality of the side wall channels are spaced apart along the circumference of the side frame, the bottom cover comprises a plurality of covering portions, one of the covering portions and the bottom plate are combined to form a bottom channel, and one of the bottom channels is correspondingly connected to one of the side wall channels.

[0017] In one embodiment, the chassis is provided with a second discharge port extending axially therethrough, and a water retaining structure is formed on opposite sides of the exoskeleton and the mounting seat, the water retaining structure is arranged around the first discharge port, the second discharge port is located on the outer periphery of the water retaining 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 installed on the outer frame, and the cleaning structure is used to clean at least one of the inner peripheral wall of the filter bottle and the filter element.

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

[0020] In one embodiment, a plurality of cleaning brushes are distributed along the axial direction of the outer frame.

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

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

[0023] In one embodiment, the exoskeleton is provided with a water flow driving member, and the water flow driving member has a driving surface, and the driving surface is arranged at an angle relative to the circumference of the exoskeleton, so that the driving surface can drive the exoskeleton to rotate after being impacted by the water flow.

[0024] In one embodiment, the water flow driving component includes a hanging portion and a driving body, the hanging portion is hung on the end of the exoskeleton close to the water inlet, the driving body is arranged in a conformal manner with the inner circumferential wall of the exoskeleton, the driving body extends along the circumferential arc of the exoskeleton, and has a plurality of water baffles distributed at intervals, and the driving surface is formed on the water baffles.

[0025] In one embodiment, the pre-filter also includes a water distributor, which is provided with a first water flow space and a second water flow space arranged outside the first water flow 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 flow side is connected to the water outlet through the first water flow space, and the second water flow side is connected to the water inlet through the second water flow space, and the second water flow space is provided with a guide blade inclined relative to the axial direction.

[0026] In one embodiment, a water isolating ring is disposed between the water inlet and the water outlet of the valve head, the water inlet is connected to the outer peripheral side of the water isolating ring, the water outlet is connected to the inner peripheral side of the water isolating ring, and the water distributor and the water isolating ring are plugged in and sealed.

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

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

[0029] The present invention also provides a water use system, comprising the aforementioned pre-filter.

[0030] In the technical solution of the present invention, the pre-filter has a flushing mode, and can regularly clean the impurities attached to the filter assembly. Under the disturbance of the exoskeleton and the impeller assembly, the sewage after flushing can well entrain the impurities and discharge them from the sewage outlet. In addition, the water flow path and flow rate entering the mounting seat can be increased through the first water inlet and the second water inlet, so that the water flow can form a more complex flow pattern in the impeller cavity, providing sufficient power for the rotation of the impeller body, and the exoskeleton and the impeller body can also synchronously move at a faster speed, thereby ensuring the disturbance of the water flow in the filter cavity to avoid the precipitation of impurities, and then ensuring the flushing effect of the pre-filter, thereby ensuring the filtering effect of the filter assembly and improving the service life of the pre-filter. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0036] Figure 5 for Figure 3 A partial enlarged view of point B in the middle;

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

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

[0039] Figure 8 A schematic structural diagram of an exoskeleton of a pre-filter provided by the present invention from a first perspective of an embodiment;

[0040] Fig. 9 A schematic structural diagram of an exoskeleton of a pre-filter provided by the present invention from a first perspective of an embodiment;

[0041] Fig.10 A schematic structural diagram of an embodiment of an exoskeleton of a pre-filter provided by the present invention from another perspective;

[0042] Fig.11 A schematic structural diagram of an impeller assembly of an embodiment of a pre-filter provided by the present invention;

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

[0044] Fig.13 for Fig.11 A schematic structural diagram of an impeller body in an impeller assembly according to an embodiment of the present invention.

[0045] Description of Figure Numbers:

[0046] 10. filter bottle; 101. water filter chamber; 102. sewage outlet;

[0047] 20, valve head; 201, water inlet; 202, water outlet; 203, water isolation ring;

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

[0049] 310, filter module; 311, support frame; 312, filter element; 313, connecting protrusion;

[0050] 320, water distributor; 321, first water flow space; 322, second water flow space; 323, guide vane;

[0051] 40, impeller assembly; 410, mounting seat; 402, first water inlet; 403, second water inlet; 404, drain outlet; 424, water retaining ring;

[0052] 440, impeller body; 441, impeller shaft; 442, impeller blades; 443, flat position;

[0053] 50, outer frame; 501, siphon flow channel; 501a, side wall flow channel; 501b, bottom flow channel; 503, first discharge port; 504, second discharge port;

[0054] 511, chassis; 511a, process notch; 512, side frame; 514, water retaining ring; 515, flow channel groove; 516, buckle; 517, clamping groove; 518, connecting groove;

[0055] 520, bottom cover; 521, buckle groove; 522, cover closing part;

[0056] 530, siphon member; 531, siphon hole;

[0057] 540, water flow driving member; 541, hanging part; 542, driving body; 543, water baffle; 544, driving surface;

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

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

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0062] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0063] Water use systems, such as whole-house water purification systems, are usually equipped with pre-filters, which are used to filter large particles of tap water. This not only ensures the safety of residents' water use, but also extends the service life of home appliances, prevents blockage of household water pipes, and improves the health of residents. The pre-filter is the first coarse filtration device in the whole-house water purification system. It is a physical filtration device used to protect the safety of back-end water use.

[0064] The present invention proposes a pre-filter, which has a filtering mode and a flushing mode. In the filtering mode, the pre-filter can filter large particles before the water end is used. In the flushing mode, the pre-filter can clean the filter component 30 inside it to discharge the large particles previously intercepted, thereby eliminating the need for manual disassembly and cleaning of the pre-filter, thereby increasing the service life of the pre-filter.

[0065] See also 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 is formed with a water filter chamber 101, the valve head 20 is provided with a water inlet 201 and a water outlet 202 connected to the water filter chamber 101, and the filter bottle 10 is provided with a sewage outlet 102 on the side away from the valve head 20.

[0066] The water inlet 201 is connected to the water supply end of the water use system, and the water outlet 202 is connected to the water use end of the water use system, thereby filtering the raw water flowing from the water supply end to the water use end. It should be noted that the water supply end can be a water pipe, a water tower or a well water, and the water use end can be a faucet, a shower or a drinking water outlet, and this application does not make specific limitations on this.

[0067] The connection between the valve head 20 and the filter bottle 10 can be threaded connection. For example, the valve head 20 is provided with an external threaded tube, and the mouth of the filter bottle 10 is provided with an internal thread for threading the external threaded tube. In order to reduce the production difficulty of the pre-filter and the inspection requirements of the assembly results, and 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, and the locking of the filter bottle 10 and the valve head 20 is achieved through the threaded cooperation between the bolt and the through hole; the fastener 1001 can also be a bolt and a nut assembly, and the bolt is locked with the nut after passing through the through hole; the fastener 1001 can also be a pin and a pin assembly, and the pin is passed through the through hole, and the pin is passed through the pin through the pin, so as to achieve the locking of the filter bottle 10 and the valve head 20.

[0068] The valve head 20 includes a metal outer shell and a plastic lining part connected to each other, and the water inlet 201 and the water outlet 202 are both formed on the plastic lining part. The metal outer shell of the valve head 20 and the filter bottle 10 are connected by a fastener 1001. In this way, the water flowing through the pre-filter directly contacts the plastic lining part instead of the metal outer shell, which can avoid the problem of water being contaminated by metal elements precipitated from the metal outer shell, and can also make the pre-filter have good aesthetics and shell strength. In other embodiments, the valve head 20 can also be directly configured as a metal part.

[0069] The materials of the metal outer shell and the plastic lining are not specifically limited in this application. For example, the material of the metal outer shell may be a copper alloy, such as brass, and the material of the plastic lining may be (polypropylene) or (polyvinyl chloride).

[0070] The pre-filter also includes a filter assembly 30 disposed in the water filter chamber 101. After the raw water (such as tap water or well water) flows into the water inlet 201 from the external water source, it can flow through the filter assembly 30 for filtration. The filter assembly 30 can intercept large particles of impurities in the water and remove some precipitated impurities, rust, sand, mud, bacteria and other particulate impurities generated in the pipeline, and play a good protective function for water purifiers, washing machines, showers, high-end faucets, downstream pipelines, etc., reducing the risk of damage to these devices due to impurity blockage. The form and structure of the filter assembly 30 are not limited. The filter assembly 30 can be equipped with a stainless steel filter or a cotton filter to filter impurities.

[0071] The pre-filter is usually a "T"-shaped structure, in which the upper "horizontal" position corresponds to the valve head 20, and the left and right ends are the water inlet 201 and the water outlet 202 respectively. The main body of the lower "vertical" is the filter bottle 10, and the sewage outlet 102 is located on the lower side of the filter bottle 10, and the filter assembly 30 is arranged at the lower "vertical".

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

[0073] Specifically, the filter element 312 is a straight cylindrical structure, and the support frame 311 is a corresponding straight cylindrical structure. One side of the support frame 311 is open and the other side is closed, and the first water-passing side 301 is located on the open side of the support frame 311. In this way, the support frame 311 and the filter element 312 have simple structures, which can facilitate the processing and molding of the filter element 312 and the support bracket, and can facilitate the installation of the filter assembly 30 in the water filter chamber 101. At the same time, the support frame 311 and the filter element 312 are both circumferentially continuous structures, and the structural strength can be guaranteed, which is conducive to improving the ability of the filter assembly 30 to resist water flow impact, thereby facilitating the service life of the filter assembly 30. Of course, the filter element 312 and the support frame 311 can also be other structural forms, such as a conical structure.

[0074] Optionally, the material of the support frame 311 is configured as plastic. First, plastic materials are cheaper than other materials such as metals, which helps to reduce the manufacturing cost of the filter module 310; second, plastic materials have good corrosion resistance to various chemical substances and can be used for a long time in various corrosive environments, reducing the damage and replacement frequency of the filter module 310 caused by corrosion; third, the density of plastic materials is low, which reduces the overall weight of the support frame 311 and facilitates installation, transportation and maintenance; fourth, because plastic materials have good processing properties, they can be made into filter frames of various shapes and sizes through various processes such as injection molding and extrusion, which facilitates the processing and molding of the support frame 311. Of course, the present invention is not limited to this. In other embodiments, the material of the support frame 311 can also be configured as metal.

[0075] Optionally, the filter element 312 is made of metal, which is durable and stable, and can increase the service life of the filter element 312, thereby effectively filtering water for a long time, reducing the replacement frequency and cost. Of course, the present invention is not limited to this, and in other embodiments, the filter element 312 can also be made of plastic.

[0076] In this embodiment, the filter element 312 is configured as a metal filter screen, which has a solid structure and can withstand certain pressure and impact to ensure safety during use. Moreover, the metal filter screen can be customized according to user needs, such as customizing equipment of non-standard size, etc., to meet the use requirements under different support frames 311. Furthermore, since the metal filter screen can be rinsed and is easy to clean. Of course, the present 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, and the material of the support frame 311 is plastic. In the production process, the filter element 312 is first installed in the mold, and then the support frame 311 is molded by the injection molding process. In this way, the filter element 312 will be welded to the surface of the support frame 311 made of plastic material through the high temperature in the mold, so that the filter element 312 and the support frame 311 are integrally injection molded. In the injection molding process, the filter element 312 is directly combined with the plastic support frame 311, avoiding the secondary processing steps such as hot melting, welding, and riveting, thereby shortening the assembly time and reducing the production cost. Moreover, the filter element 312 is embedded in the support frame 311, which can improve the installation strength of the filter element 312, so that it can withstand greater loads and impacts. Of course, the present invention is not limited to this. In other embodiments, the filter element 312 and the support frame 311 can also be separately molded and connected by bonding or welding.

[0078] In one embodiment, please refer to Figure 3 and Figure 4 , Figure 6 and Figure 7 The pre-filter also includes a water distributor 320, which is provided with a first water flow space 321 and a second water flow space 322 arranged outside the first water flow 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, so that the first water flow side 301 is connected to the water outlet 202 through the first water flow space 321, and the second water flow side 302 is connected to the water inlet 201 through the second water flow space 322, and the second water flow space 322 is provided with a guide blade 323 inclined relative to the axial direction.

[0079] The axial sides of the water distributor 320 are respectively connected to the filter module 310 and the valve head 20. In the flushing mode and the filtering mode of the pre-filter, the first water flow space 321 and the second water flow space 322 of the water distributor 320 will maintain communication with the above-mentioned corresponding structures, that is, the pre-filter is a positive flushing filter. In the flushing mode and the filtering mode, the flow path of water flowing into the filter assembly 30 does not change.

[0080] In the filtering mode, the water inlet 201 and the water outlet 202 are opened, and the sewage outlet 102 is closed. After the water entering the water inlet 201 passes through the first water flow space 321 and enters the water filter chamber 101, it will flow from the outer periphery of the filter component 30 through the second water flow port of the filter component 30 and enter the inner periphery of the filter component 30, thereby being filtered by the filter element 312. Impurities are intercepted by the filter element 312, and the filtered water will flow to the water outlet 202 through the second water flow space 322.

[0081] In the flushing mode, the water inlet 201 and the sewage outlet 102 are opened, and the water outlet 202 is closed. The water flow entering the water inlet 201 still enters the water filter chamber 101 through the first water flow space 321. After the water flow flushes the surface of the filter element 312, the sewage will be discharged through the sewage outlet 102, thereby discharging the impurities previously intercepted, which can reduce the adhesion of impurities on the filter element 312, so as to ensure the filtering effect of the filter assembly 30 and improve the service life of the pre-filter.

[0082] Among them, the guide blades 323 arranged in the second water flow space 322 enable the water flow entering the water filter chamber 101 to form a vortex, so as to disturb the water flow and avoid the deposition of impurities. Especially in the flushing mode, the impurities can be better entrained in the water flow, thereby facilitating the impurities to be discharged from the sewage outlet 102 along with the water flow.

[0083] Furthermore, the valve head 20 is provided with a water isolating ring 203 between the water inlet 201 and the water outlet 202, the water inlet 201 is connected to the outer peripheral side of the water isolating ring 203, the water outlet 202 is connected to the inner peripheral side of the water isolating ring 203, and the water distributor 320 and the water isolating ring 203 are plugged in and sealed. Specifically, the water distributor 320 is inserted into the inner side of the water isolating ring 203, and a sealing ring is sleeved on the outer periphery of the water distributor 320, and the outer peripheral side of the sealing ring abuts against the inner peripheral side 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 the connection between the two will not leak, and the raw water that has not been filtered by the filter element 312 and the clean water filtered by the filter element 312 will not leak into each other, which is beneficial to ensure the filtering effect of the pre-filter.

[0084] In one embodiment, see Figures 3 to 6The pre-filter also includes an exoskeleton 50, which is rotatably mounted on the outside of the filter assembly 30. In this way, the exoskeleton 50 can be rotated to disturb the water flow in the water filter chamber 101, thereby preventing impurities from being deposited and attached to the filter assembly 30, the exoskeleton 50 and the side walls of the water filter chamber 101, and reducing the possibility of clogging of the filter assembly 30, thereby ensuring the filtering effect of the filter assembly 30. In this embodiment, the exoskeleton 50 includes a side frame 512 and a chassis 511, and the chassis 511 is connected to the side frame 512 and is located on a side away from the valve head 20, with strong structural stability and high rotation stability. Of course, in other embodiments, the exoskeleton 50 may also include only the side frame 512 structure.

[0085] In one embodiment, see Figure 8 The side frame 512 is provided with a water flow driving member 540, and the water flow driving member 540 has a driving surface 544, and the driving surface 544 is set at an angle relative to the circumference of the outer frame 50, so that after the driving surface 544 is subjected to the impact of the water flow, it can drive the outer frame 50 to rotate. In this way, when the driving surface 544 is driven by the water flow, the water flow driving member 540 can generate a driving force on the outer frame 50 in the circumference of the outer frame 50, thereby prompting the outer frame 50 to rotate around its axis, that is, around the axial rotation of the filter assembly 30, so that the kinetic energy of the water flow can be converted into the kinetic energy of the rotation of the outer frame 50 through the driving surface 544, and the rotation of the outer frame 50 is realized, thereby disturbing the water flow in the water filter chamber 101, preventing impurities from being deposited and attached to the filter assembly 30, the outer frame 50 and the side wall of the water filter chamber 101, reducing the possibility of clogging of the filter assembly 30, and thus improving the filtering effect of the filter assembly 30. Furthermore, the water flow can form a swirl after passing through the water distributor 320, thereby providing a greater driving force through the driving surface 544. That is, the water distributor 320 cooperates with the water flow driving member 540 to provide a certain rotation driving force to the exoskeleton 50, and the impeller body 440 itself rotates under the impact of the water flow and links the exoskeleton 50, and can also provide a certain rotation driving force to the exoskeleton 50, and these two rotation driving forces are arranged in the same direction.

[0086] In one embodiment, the water flow drive member 540 is clamped to the end of the side frame 512. The water flow drive member 540 is connected to the end of the side frame 512 by clamping, so that the side frame 512 and the water flow drive member 540 are formed separately, which improves the molding probability and convenience. The side frame 512 and the water flow drive member 540 are connected by clamping, and the connection operation is convenient. At the same time, the water flow drive member 540 can also be kept stable at the end of the side frame 512 to improve production efficiency. Of course, in other embodiments, the water flow drive member 540 can also be connected to the side frame 512 by screwing, melting or integral molding, or the water flow drive member 540 is clamped to the axial middle part of the side frame 512.

[0087] Specifically, in this embodiment, a plurality of water flow driving members 540 are provided on the side frame 512, and the plurality of water flow driving members 540 are spaced apart along the circumference of the outer frame 50. It can be understood that the plurality of water flow driving members 540 are spaced apart at the end of the side frame 512 around the circumference of the outer frame 50, so that the plurality of driving surfaces 544 distributed in the circumference of the outer frame 50 tend to be uniform, and thus the driving force received by the outer frame 50 in the circumference can be balanced, so that the outer frame 50 can rotate at a uniform speed to ensure the cleaning effect of the filter assembly 30. Without loss of generality, in this embodiment, the water flow driving member 540 is provided with a plurality of driving surfaces 544, and the plurality of driving surfaces 544 are uniformly distributed on the water flow driving member 540 along the circumference of the outer frame 50, and the plurality of water flow driving members 540 are uniformly distributed in the circumference of the side frame 512, thereby ensuring that the driving surfaces 544 are uniformly distributed in the circumference of the side frame 512, so as to ensure the rotational stability of the outer frame 50. Of course, in other embodiments, a plurality of water flow driving members 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] As for the clamping relationship between the water flow drive member 540 and the side frame 512, in this embodiment, the water flow drive member 540 includes a hanging portion 541, and the hanging portion 541 is hung on the end of the side frame 512 and is clamped with the side frame 512. It can be understood that the water flow drive member 540 is hung from the end of the side frame 512 toward the side frame 512 along the axial direction, and the connection operation is convenient and the connection is stable. After the hanging portion 541 is hung on the side frame 512, the water flow drive member 540 is clamped with the side frame 512. Here, the hanging portion 541 can be clamped on the side frame 512, or other parts of the water flow drive member 540 can be clamped on the side frame 512. In this way, the connection in a hanging manner provides a positioning reference for the connection between the water flow drive member 540 and the side frame 512, and simplifies the connection between the water flow drive member 540 and the side frame 512. In addition, after the hooking portion 541 is hooked to the side wall, a limit is formed on the water flow driving member 540 in the radial direction to prevent the water flow driving member 540 from moving radially relative to the side frame 512. Of course, in other embodiments, the water flow driving member 540 can also be connected to the side wall by plugging, or by turning a knob.

[0089] The water flow driving member 540 also includes a driving body 542 connected to the hanging portion 541, the driving body 542 is hung on the inner side of the side frame 512, the hanging portion 541 is engaged with the outer side of the side frame 512, and the driving surface 544 is formed on the driving body 542. Without loss of generality, the gap between the outer frame 50 and the shell is small, and the gap between the outer frame 50 and the filter assembly 30 is large to ensure the efficiency of filtering the water through the filter assembly 30. In this way, the driving body 542 with the driving surface 544 is arranged on the inner side of the side frame 512 to prevent the tension between the side wall of the water filter chamber 101 and the water flow from affecting the impact force of the water flow on the driving surface 544, thereby ensuring the rotation stability and reliability of the outer frame 50. In addition, since the driving surface 544 is arranged on the driving body 542, the driving body 542 inevitably maintains good flatness in the circumferential direction of the side frame 512. The driving body 542 is arranged on the inner side of the side frame 512, which can ensure the flatness of the outer side of the outer frame 50, avoid the interference of the shell with the rotation of the outer frame 50, and ensure that the driving surface 544 obtains sufficient water flow impact. At the same time, the hanging part 541 is clamped on the outer side of the side frame 512, and the driving body 542 is on the inner side of the side frame 512, balancing the force of the water flow driving member 540 in the inner and outer directions of the side frame 512, thereby ensuring the connection stability of 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 water filter cavity 101 is large, the driving body 542 can also be arranged 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 in the circumferential direction of the side frame 512, and can refer to the arrangement of the guide blades 323 in the water distributor 320, and guide the water flow to impact the driving surface 544 by the guiding effect of the guide blades 323 on the water flow, or a drainage structure is set on the channel wall between the water inlet 201 and the water flow driving member 540, and the water flow is guided in a vortex shape along the axial direction of the filter assembly 30, so that it can directly impact the driving surface 544 parallel to the axial direction of the outer frame 50, so that the water flow driving member 540 can obtain a larger water flow impact force, improve the rotation speed or rotation efficiency of the outer frame 50, avoid impurities from adhering to the filter assembly 30, ensure the cleanliness of the filter assembly 30, and improve the filtering efficiency of the filter assembly 30 for the water flow. Of course, in other embodiments, the driving surface 544 can also be inclined relative to the axial direction of the outer frame 50, or, relative to the radial direction of the side frame 512.

[0091] In one embodiment, the driving body 542 extends along the circumferential arc of the side frame 512, and a plurality of water baffles 543 are spaced apart, and the driving surface 544 is formed on the water baffles 543. Without loss of generality, the water baffles 543 are protruding from the driving body 542, and the driving surface 544 is formed on the side wall of the water baffles 543 along the circumferential direction of the side frame 512, so that the driving surface 544 can have a certain size in the radial direction, ensuring that the driving surface 544 is stably impacted by the water flow, and at the same time, the driving body 542 extends along the inner circumference of the side frame 512, and the plurality of water baffles 543 are spaced apart in the extension direction of the driving body 542, so as to evenly distribute the driving force in the circumferential direction of the side frame 512, and ensure the stability of the rotation of the exoskeleton 50. In addition, the driving body 542 is arranged in a conformal manner on the inner circumferential wall of the side frame 512, and the two are closely fitted. When the driving body 542 is subjected to force, the inner wall of the side frame 512 can provide a sufficiently stable support for the driving body 542, thereby effectively pulling the side frame 512 to rotate, avoiding shaking between the water flow driving member 540 and the side frame 512, resulting in energy waste, ensuring the rotation efficiency of the outer frame 50, and improving the cleaning effect of the filter assembly 30. Of course, in other embodiments, a driving groove can also be recessed on the driving body 542, and the side groove wall of the driving groove is configured as a driving surface 544.

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

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

[0094] Therefore, when the outer frame 50 is provided with a water flow driving member 540, on the one hand, the outer frame 50 can be driven by the vortex generated by the water distributor 320 under the action of the water flow driving member 540, and rotate, and the rotation of the outer frame 50 can also drive the impeller body 440 to rotate, and the impeller body 440 can disturb the water flow entering the internal space of the mounting seat 410, thereby preventing impurities from being deposited in the internal space of the mounting seat 410. On the other hand, after the water flow enters the internal space of the mounting seat 410, it acts on the blades of the impeller body 440, which can provide a driving force for the rotation of the impeller body 440, thereby in turn driving 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 of the water flow inside the water filter chamber 101, so as to avoid the deposition of impurities to the greatest extent, thereby ensuring the flushing effect of the pre-filter. Of course, when only the impeller assembly 40 is provided, the outer frame 50 is driven to rotate by the impeller body 440, which is also helpful to avoid the deposition of impurities, thereby ensuring the flushing effect of the pre-filter.

[0095] Without loss of generality, see Fig.13 The impeller body 440 includes an impeller shaft 441 and a plurality of impeller blades 442 obliquely arranged on the impeller shaft 441. The water flows from the first water inlet 402 and the second water inlet 403 can make the impeller blades 442 drive the impeller shaft 441 to rotate. Specifically, one side of the impeller blade 442 is curved into an arc surface, a part of the arc surface faces the first water inlet 402, and the other part faces the second water inlet 403. In this way, the impeller blade 442 can be acted upon by the water flows from the second water inlet 403 on the side and the first water inlet 402 on the top and drive the impeller shaft 441 to rotate. In this way, the water flow path and flow rate entering the mounting seat 410 are increased through the first water inlet 402 and the second water inlet 403. The provision of multiple water inlets can form a more complex flow pattern in the impeller cavity, providing sufficient power for the rotation of the impeller body 440.

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

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

[0098] The side wall flow channel 501a can be formed by the side frame 512 itself; it can also be a part formed with the side wall flow channel 501a separately. In the present embodiment, the siphon member 530 and the side frame 512 constituting the side wall flow channel 501a together form the side wall flow channel 501a. The number of siphon members 530 corresponds to that of the siphon flow channels 501, and the siphon holes 531 are arranged on the siphon member 530.

[0099] Reference Figure 4 There are various ways to fix the siphon member 530 to the side frame 512. For example, the siphon member 530 can be locked and fixed to the side frame 512. This is not convenient during installation or maintenance. In this embodiment, for convenient and firm installation, the siphon member 530 and the side frame 512 can be assembled and clamped by the cooperation of the slideway and the slide rail, so that the siphon member 530 can be more easily inserted and fixed to the side frame 512, and it is also easy to disassemble, which improves the convenience of operation.

[0100] In one embodiment, the exoskeleton 50 further includes a bottom cover 520, and the bottom cover 520 and the chassis 511 are covered to form the bottom flow channel 501b. In this way, the bottom flow channel 501b is formed by assembling the bottom cover 520 and the chassis 511, which are formed separately, so as to facilitate the processing and forming of the bottom flow channel 501b, improve production convenience, and ensure the yield rate of finished products. Of course, in other embodiments, it is also possible to form the bottom flow channel 501b with a separate part and then install it in the slot of the chassis 511.

[0101] In order to facilitate the installation of the bottom cover 520 and the chassis 511, the chassis 511 is convexly provided with a flow channel groove 515, the flow channel groove 515 is open upward, the notch of the flow channel groove 515 is connected to the side wall flow channel 501a, and the groove bottom of the flow channel groove 515 relative to the notch extends to the center of the chassis 511. The bottom cover 520 and the flow channel groove 515 are snap-fitted and sealed to form the bottom flow channel 501b. The design of the flow channel groove 515 enhances the connection stability between the chassis 511 and the bottom cover 520, making the entire exoskeleton 50 structure more stable and not prone to loosening or deformation. The upward open design of the flow channel groove 515 makes the installation of the bottom cover 520 more convenient, and the user can snap-fit ​​the bottom cover 520 with the flow channel groove 515 without complicated operations to complete the formation of the bottom flow channel 501b.

[0102] Reference Fig. 9 In order to ensure the stability of the fixing, the bottom cover 520 is provided with a flow channel groove 515, and a buckle 516 is provided on the outer side wall of the flow channel groove 515. The bottom cover 520 is provided with a buckle groove 521 corresponding to the buckle 516, and the bottom cover 520 is fixed to the chassis 511 by the buckle 516 and the buckle groove 521. The stability can be further enhanced by the design of the buckle 516 and the buckle groove 521. The close fit between the buckle 516 and the buckle groove 521 can prevent the bottom cover 520 from loosening or falling off due to water flow impact or external force during use. The design of the buckle 516 and the buckle groove 521 puts forward higher requirements on the installation accuracy, which helps to ensure that the bottom cover 520 can be accurately aligned and fixed with the flow channel groove 515 during installation, avoiding the sealing problem or structural instability caused by improper installation. The design of the buckle 516 and the buckle groove 521 makes the removal and installation of the bottom cover 520 easier and faster.

[0103] Reference Figure 3In order to facilitate manufacturing, the buckle 516 is arranged on the opposite sides of the flow channel groove 515, and the chassis 511 is provided with a process notch 511a that passes through the chassis 511 corresponding to the buckle 516. After the bottom cover 520 is covered with the chassis 511, the bottom cover 520 blocks the process notch 511a. By arranging the buckle 516 on the opposite sides of the flow channel groove 515 and correspondingly opening the process notch 511a on the chassis 511, the mold design and manufacturing process are simplified. The setting of the process notch 511a makes it easier to form the buckle 516 structure in the manufacturing process such as injection molding or stamping, reducing the manufacturing cost and difficulty. Although the opening of the process notch 511a seems to weaken the local strength of the chassis 511, through reasonable design and the shielding of the bottom cover 520, it will not actually have a significant impact on the overall structural strength. At the same time, the buckle 516 is located on the opposite sides of the flow channel groove 515, which can more effectively disperse and resist external forces and maintain the stability of the structure. The process notch 511a is completely covered after the bottom cover 520 and the chassis 511 are covered, and will not affect the 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 buckle 516 still retains the characteristics of easy disassembly and easy installation, making the maintenance of the bottom cover 520 simple and quick. When the user performs operations such as cleaning or replacing the filter assembly 30, the bottom cover 520 can be easily disassembled and installed.

[0104] Specifically, a plurality of siphon channels 501 are provided at intervals along the circumference of the outer frame 50, and the first discharge ports 503 are provided corresponding to the number of siphon channels 501, and the first discharge ports 503 are connected to a bottom channel 501b. To ensure the drainage effect, it is ensured that each bottom channel 501b has a corresponding first discharge port 503. To simplify the installation process and facilitate the connection between the bottom cover 520 and the chassis 511, the bottom cover 520 is integrally formed with a plurality of cover parts 522, and a cover part 522 and the chassis 511 are enclosed to form a bottom channel 501b. By designing a plurality of cover parts 522 to be connected to the chassis 511, each cover part 522 and the chassis 511 are enclosed to form a bottom channel 501b, so that the connection between the bottom cover 520 and the chassis 511 is more convenient and accurate.

[0105] Each siphon flow channel 501 is provided with an independent first discharge port 503. In order to drain water smoothly, the first discharge ports 503 are all inclined in the same direction from the upper surface of the chassis 511 to the lower surface. The inclined first discharge ports 503 can guide the water flow to flow out more smoothly, reducing the retention and vortex phenomenon of the water flow in the bottom flow channel 501b. This helps to avoid the accumulation of impurities in the bottom flow channel 501b and keep the pre-filter clean and efficient. The first discharge port 503 is inclined clockwise or counterclockwise along the axial direction. The inclined first discharge port 503 also has a certain anti-backflow function and can also make the drainage form a vortex. The efficient design of the bottom flow channel 501b and the first discharge port 503 enables the pre-filter to discharge impurities and sewage faster, improving the filtering effect and the overall performance of the system. In order to avoid water outlet interference, the first discharge ports 503 are all arranged at the end of the bottom flow channel 501b.

[0106] Reference Figure 8 and Fig. 9 The bottom plate 511 is also provided with a second discharge port 504 extending axially therethrough. In the flushing mode of the filter, the sewage after cleaning the filter assembly 30 can be not only sucked into the siphon channel and discharged toward the sewage outlet 102 through the first discharge port 503, but can also be discharged toward the sewage outlet 102 through the second discharge port 504, which helps to speed up the water flow speed and improve the sewage discharge efficiency.

[0107] The chassis 511 may be provided with a plurality of second discharge ports 504. These second discharge ports 504 may be evenly distributed or arranged in a targeted manner as required to maximize drainage efficiency. Specifically, a plurality of second discharge ports 504 are provided, and the second discharge ports 504 are arranged between two adjacent siphon channels 501 and close to the outer peripheral side of the chassis 511 relative to the first discharge ports 503. The second discharge ports 504 are arranged at a position symmetrical to the first discharge ports 503 to ensure that the entire exoskeleton 50 can be evenly impacted by the water flow and pass through the water flow, which helps to disperse the drainage pressure, improve the drainage efficiency, and ensure the structural strength of the exoskeleton 50.

[0108] In one embodiment, please refer to Figures 8 to 11 A water retaining structure is formed on the opposite sides of the outer frame 50 and the mounting seat 410 , and the water retaining structure is arranged around the first discharge port 503 . The second discharge port 504 is located at the periphery of the water retaining structure to communicate with the second water inlet 403 .

[0109] Specifically, a water retaining ring 514 is provided at the bottom of the outer frame 50, and a water retaining ring 424 is provided at the mounting seat 410. The water retaining ring 514 and the water retaining ring 424 cooperate to form a water retaining structure. The siphon flow channel 501 and the first water inlet 402 are connected at the inner periphery of the water retaining structure, and the filter water cavity 101 at the outer periphery of the filter assembly 30 is connected to the second water inlet 403 at the outer periphery of the water retaining structure through the second discharge port 504. Further, the mounting seat 410 is provided with second water inlets 403 on both opposite sides, and the water in the filter bottle 10 other than the siphon flow channel 501 can enter from these two second water inlets 403 when sewage is discharged. Four first water inlets 402 inclined in the same direction are designed on the mounting seat 410, and the water flowing out of the siphon flow channel 501 enters the inner cavity of the mounting seat 410 through the first water inlet 402. In this way, the water inlet paths of the two water inlets of the impeller assembly 40 can be separated by the water retaining structure without interfering with each other, thereby preventing excessive water flow from other positions from entering the first water inlet 402 at the top of the mounting seat 410, thereby ensuring the adsorption capacity of the siphon channel 501.

[0110] In one embodiment, the filter assembly 30 is fixedly installed in the water filter chamber 101 so that the filter assembly 30 can filter stably. Specifically, the filter assembly 30 includes a filter module 310 and a water distributor 320 that are fixedly connected in the axial direction. The outer periphery of the water distributor 320 is provided with a plurality of spaced fixed protrusions, which are correspondingly engaged with a plurality of fixed grooves on the inner circumferential wall of the filter bottle 10, so that the filter assembly 30 is fixed to the filter bottle 10 in the circumferential direction. Furthermore, the water distributor 320 is formed with a step structure. When the water distributor 320 is plugged into and matched with the water isolation ring 203, it also abuts against the end face of the water isolation ring 203 through the step structure, so that one axial side of the filter assembly 30 is limited. Furthermore, the exoskeleton 50 is rotatably connected to the filter assembly 30. In this way, there is a connection and matching relationship between the filter component 30 and the exoskeleton 50, which is conducive to ensuring the rotational stability of the exoskeleton 50. At the same time, the other axial side of the filter component 30 will also be limited by the exoskeleton 50, so that the filter component 30 can also remain fixed relative to the filter bottle 10 in the axial direction.

[0111] It can be 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 is formed with a connection groove 518, the support frame 311 is convexly provided with a connection protrusion 313, and the connection protrusion 313 is rotatably inserted into the connection groove 518, one end of the impeller shaft 441 is provided with a flat position 443, and the chassis 511 is correspondingly provided with a clamping groove 517, and the flat position 443 is adapted to be clamped in the clamping groove 517. In this way, the rotatable connection between the support frame 311 and the outer frame 50, and the transmission cooperation between the impeller body 440 and the outer frame 50 can be achieved. When the bottom cover 520 is installed on the chassis 511 , the bottom cover 520 is provided with an avoidance groove corresponding to the connection groove 518 , so that the connection groove 518 can be exposed for connection with the connection protrusion 313 .

[0112] In one embodiment, see Figure 6 and Figure 8 The side frame 512 is also provided with a cleaning structure, which is staggered with the siphon flow channel 501. The cleaning structure can also be arranged in multiple groups in the circumferential direction to clean at least one of the inner wall of the filter bottle 10 and the outer peripheral side of the filter module 310. In the flushing mode, with the rotation of the outer frame 50, the cleaning structure can sweep away the impurities on the relevant structure through the cleaning effect, so that the impurities are separated and can be discharged with the water flow, thereby avoiding serious blockage on the filter assembly 30, ensuring the filtering effect of the filter assembly 30, and improving the service life of the pre-filter.

[0113] In one embodiment, see Figure 6 and Figure 8 A cleaning brush 60 is protruding from the inner peripheral wall of the outer frame 50 , and the cleaning brush 60 is inclined relative to the radial direction of the outer frame 50 in the direction from the outside to the inside. It can be understood that the end of the cleaning brush 60 should abut against the filter element 312. The inclined cleaning brush 60 can facilitate the stretching of the bristles, so that the cleaning brush 60 can have a sufficiently large area in the axial direction to contact the filter element 312, so as to ensure the coverage of the filter element 312 by the cleaning brush 60 in the axial direction. In the circumferential direction, the outer skeleton 50 can be rotated to drive the cleaning brush 60 to comprehensively clean the circumferential side 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, so as to increase the service life of the filter assembly 30 and ensure the filtering effect of the filter assembly 30. At the same time, when the outer skeleton 50 rotates relative to the filter assembly 30, the friction between the cleaning brush 60 and the filter element 312 can be reduced, thereby ensuring that the cleaning brush 60 can clean the filter element 312 in the circumferential direction.

[0114] In one embodiment, a plurality of cleaning brushes 60 are distributed along the axial direction of the outer frame 50. In this way, the cleaning brush 60 can cover the filter element 312 in the axial direction, thereby ensuring the cleaning effect of the cleaning brush 60 on the filter element 312. Of course, only one cleaning brush 60 can be distributed in the same axial direction, and the axial coverage of the filter element 312 can be achieved by one cleaning brush 60, or the axial coverage of the filter element 312 can be achieved by multiple cleaning brushes 60 that are distributed at intervals in the circumferential direction and staggered in the axial direction.

[0115] In one embodiment, for a group of cleaning brushes 60 distributed at the same axial position, two adjacent cleaning brushes 60 extend in different directions in the axial direction of the outer frame 50. That is, the two adjacent cleaning brushes 60 can be inclined and extended close to each other, or can be inclined and extended away from each other, and these two matching relationships are alternately distributed along the axial direction, which can facilitate the cleaning brush 60 to cover the filter element 312 in the axial direction, thereby ensuring the cleaning effect of the cleaning brush 60 on the filter element 312. Further, for a group of cleaning brushes 60 distributed at the same axial position, the two adjacent cleaning brushes 60 are arranged at an acute angle, so that the cleaning brush 60 can cover the filter element 312 in the axial direction, and the cleaning brush 60 has a sufficient length to ensure the loss during the brushing process, thereby improving the service life of the cleaning brush 60. Of course, in other embodiments, the cleaning brush 60 can also be installed on the outer frame 50 in other states.

[0116] The present invention also proposes a water system, which includes a pre-filter. The specific structure of the pre-filter refers to the above embodiment. Since the water system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the water system at least includes related components from the pre-filter to the water end. For example, the water system can include household appliances such as water heaters, dishwashers, and water dispensers, and can also include accessories such as water pipes for domestic water in the whole house.

[0117] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pre-filter, characterized in that: include: A valve head and a filter bottle, wherein the filter bottle is formed with a water filter cavity, the valve head is provided with a water inlet and a water outlet connected to the water filter cavity, and a sewage outlet is provided on a side of the filter bottle away from the valve head; A filter assembly is fixedly installed in the water filter cavity, the filter assembly includes a filter module, the filter module includes a support frame and a filter element, the support frame has a first water pass side located on one side in the axial direction and a second water pass side surrounding in the circumferential direction, and the filter element is arranged on the second water pass side; An outer frame is arranged in the water filter cavity and is rotatably sleeved outside the filter assembly; The impeller assembly includes a mounting seat fixedly installed in the water filter chamber and an impeller body rotatably installed on the mounting seat. The impeller body and the outer frame are coaxially connected and fixed in the circumferential direction. The mounting seat includes a first water inlet arranged on one axial side, a second water inlet arranged on the circumferential side, and a drain outlet arranged on the other axial side.

2. The pre-filter according to claim 1, characterized in that: The exoskeleton includes a side frame and a bottom plate, the bottom plate is connected to the side frame and is located on a side away from the valve head, the exoskeleton is formed with a siphon flow channel, the siphon flow channel includes a side wall flow channel and a bottom flow channel connected to the side wall flow channel, the side wall flow channel is arranged corresponding to the side frame, the side wall flow channel is provided with a siphon hole facing the filter assembly, the bottom flow channel is arranged corresponding to the bottom plate, and is provided with a first discharge port, the first discharge port is connected to at least one of the first water inlet and the second water inlet.

3. The pre-filter according to claim 2, characterized in that: The outer frame also includes a bottom cover, and the bottom cover is combined with the bottom plate to form the bottom flow channel.

4. The pre-filter according to claim 3, characterized in that: The bottom cover is arranged on a side of the bottom plate close to the filter assembly, the filter assembly is rotatably connected to the bottom cover, and the first discharge port is arranged on the bottom plate.

5. The pre-filter according to claim 3, characterized in that: The bottom cover is detachably connected to the chassis.

6. The pre-filter according to claim 3, characterized in that: The chassis is provided with a flow channel, which is open on one side facing the filter assembly, is connected with the side wall flow channel, and extends to the center of the chassis. The bottom cover is snap-fitted with the flow channel and seals the opening of the flow channel to form the bottom flow channel.

7. The pre-filter according to claim 6, characterized in that: The bottom cover is provided with 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 through the buckle and the buckle groove.

8. The pre-filter according to claim 7, characterized in that: The two opposite sides of the flow channel groove are each provided with a buckle, and the chassis is provided with a process notch penetrating the chassis corresponding to the buckle. After the bottom cover is covered with the chassis, the bottom cover covers the process notch.

9. The pre-filter according to claim 3, characterized in that: The side wall flow channels are arranged in a plurality at intervals along the circumference of the side frame. The bottom cover includes a plurality of covering parts. One of the covering parts and the bottom plate are combined to form a bottom flow channel. One of the bottom flow channels is correspondingly connected to one of the side wall flow channels.

10. The pre-filter according to claim 2, characterized in that: The chassis is provided with a second discharge port extending axially therethrough, and a water retaining structure is formed on opposite sides of the exoskeleton and the mounting seat, the water retaining structure is arranged around the first discharge port, the second discharge port is located at the outer periphery of the water retaining structure, the first discharge port is connected to the second water inlet, and the second discharge port is connected to the second water inlet.

11. The pre-filter according to claim 1, characterized in that: A cleaning structure is installed on the outer frame, and the cleaning structure is used to clean at least one of the inner peripheral wall of the filter bottle and the filter element.

12. The pre-filter according to claim 1, characterized in that: A cleaning brush is protrudingly provided on the inner peripheral wall of the outer frame, and the cleaning brush is inclined relative to the radial direction of the outer frame in a direction from the outside to the inside.

13. The pre-filter according to claim 12, characterized in that: A plurality of cleaning brushes are distributed along the axial direction of the outer frame.

14. The pre-filter according to claim 13, characterized in that: Two adjacent cleaning brushes extend in different directions in the axial direction of the outer frame.

15. The pre-filter according to claim 13, characterized in that: Two adjacent cleaning brushes are arranged at an acute angle.

16. The pre-filter according to claim 1, characterized in that: The outer frame is provided with a water flow driving member, and the water flow driving member has a driving surface, and the driving surface is arranged 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.

17. The pre-filter according to claim 16, characterized in that: The water flow driving component includes a hanging part and a driving body, the hanging part is hung on the end of the outer frame close to the water inlet, the driving body is arranged in a conformal manner with the inner circumferential wall of the outer frame, the driving body extends along the circumferential arc of the outer frame, and has a plurality of water baffles distributed at intervals, and the driving surface is formed on the water baffles.

18. The pre-filter according to claim 1, characterized in that: The pre-filter also includes a water distributor, which is provided with a first water flow space and a second water flow space arranged outside the first water flow 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 flow side is connected to the water outlet through the first water flow space, and the second water flow side is connected to the water inlet through the second water flow space, and the second water flow space is provided with a guide blade inclined relative to the axial direction.

19. The pre-filter according to claim 18, characterized in that: The valve head is provided with a water isolating ring between the water inlet and the water outlet, the water inlet is connected to the outer peripheral side of the water isolating ring, the water outlet is connected to the inner peripheral side of the water isolating ring, the water distributor and the water isolating ring are plugged in and sealed.

20. The pre-filter according to claim 1, characterized in that: The filter element is a straight cylindrical structure; And / or, the filter assembly is fixed to the filter bottle in the circumferential direction, and the exoskeleton is rotatably connected to the filter assembly.

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

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