Pre-filter and water system

Abstract

The invention discloses a pre-filter and a water consuming system, and relates to the technical field of pre-filters, the pre-filter comprises a filter bottle, a filter assembly, an outer framework and an impeller assembly, the filter bottle is provided with a water filtering cavity and a drain outlet communicated with the water filtering cavity; the filtering assembly is arranged in the water filtering cavity; the outer framework is provided with a siphon flow channel; the outer framework is sleeved with the filtering assembly and can rotate relative to the filtering assembly, the impeller assembly is arranged in the water filtering cavity, the outer framework is in transmission connection with the impeller body, and the installation base is provided with a first water inlet communicated with the siphon flow channel and a water drainage opening communicated with the sewage draining opening. The prefilter provided by the invention can more effectively utilize the power of water flow to automatically clean and filter, and reduces the dependence of external energy (such as electric power), thereby improving the energy efficiency and realizing energy conservation.

Description

Technical Field

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

[0002] Some pre-filters on the market usually have a flushing function, that is, they can be cleaned regularly to discharge the large particles that were previously intercepted, thereby increasing the service life of the pre-filter. Currently, most of them use direct flushing, which has a weak flushing effect and may cause sediments to block the sewage outlet during the drainage process. Summary of the invention

[0003] The main purpose of the present invention is to propose a pre-filter and a water use system, which can automatically rotate the exoskeleton by utilizing hydraulic force when water flows through. The rotation of the exoskeleton can also promote the uniform distribution of water around the filter component. The setting of the siphon flow channel can improve the filtration efficiency; and the impeller assembly can improve the flushing efficiency of the pre-filter, and can also improve the drainage efficiency of the pre-filter and promote the discharge of impurities.

[0004] To achieve the above-mentioned purpose, the pre-filter proposed in the present invention includes a filter bottle, a filter assembly, an exoskeleton and an impeller assembly, the filter bottle is provided with a water filter chamber and a sewage outlet connected to the water filter chamber; the filter assembly is arranged in the water filter chamber; the exoskeleton is provided with a siphon flow channel; the exoskeleton is sleeved with the filter assembly and can rotate relative to the filter assembly, the impeller assembly is arranged in the water filter chamber, the impeller assembly includes a mounting seat and an impeller body rotatably arranged in the impeller chamber of the mounting seat; the exoskeleton is transmission-connected to the impeller body, the mounting seat is provided with a first water inlet connecting the impeller chamber and the water filter chamber, and a sewage outlet connected to the sewage outlet.

[0005] In one embodiment, the mounting seat includes a first shell and a second shell that are detachably connected, the second shell covers the first shell to form the impeller chamber, the first shell has a flange protruding from the outer peripheral side, and the sealing groove is provided on the flange.

[0006] In one embodiment, an impeller shaft seat for mounting an impeller body is disposed on the second housing, and one end of the impeller body is rotatably mounted on the impeller shaft seat, and the other end of the impeller body is rotatably mounted on the first housing.

[0007] In one embodiment, the impeller shaft seat protrudes from the surface of the second shell, and the impeller shaft seat is provided with partition openings recessed downward from the top edge of the impeller shaft seat at intervals along the circumferential direction.

[0008] In one embodiment, the first shell is provided with a mounting groove for accommodating the impeller body, the inner periphery of the mounting groove is provided with a hook, the outer periphery of the second shell is provided with a slot, the second shell is fixed to the first shell by the hook and the slot, and covers the mounting groove to form the impeller cavity.

[0009] In one embodiment, a skirt is provided on a peripheral side of the second shell, and the skirt abuts against an edge of the first shell.

[0010] In one embodiment, a plurality of the first water inlets are provided, and the plurality of the first water inlets are all inclined from the top of the mounting seat toward the bottom of the mounting seat along the first rotation direction.

[0011] In one embodiment, a water retaining ring is provided at the bottom of the outer frame, and a water retaining ring is provided at the mounting seat. The water retaining ring and the water retaining ring cooperate to form a water retaining channel, and the siphon flow channel and the first water inlet are connected through the water retaining channel.

[0012] In one embodiment, the bottom plate is convexly provided with a flow channel groove, which is open upwards, and the notch of the flow channel groove is connected with the side wall flow channel, and the bottom cover covers the flow channel groove to form the bottom flow channel.

[0013] In one embodiment, a plurality of second water inlets with the same circumferential opening are provided at intervals on the circumferential side of the mounting seat; and the second water inlets are provided with a water guiding slope along the water inflow direction.

[0014] In one embodiment, the exoskeleton comprises:

[0015] A cartridge rack, the cartridge rack comprising a bottom plate and a side frame arranged on the bottom plate, the siphon flow channel comprising a side wall flow channel and a bottom flow channel connected to the side wall flow channel, the side wall flow channel being arranged corresponding to the side frame, and the side wall flow channel being provided with a siphon hole connected to the inner side of the cartridge rack; and

[0016] A bottom cover is formed by covering the bottom plate with the bottom plate to form the bottom flow channel. The bottom plate is provided with a first discharge port connected to the outside of the cartridge rack. The bottom flow channel is connected to the first discharge port and the first water inlet.

[0017] In one embodiment, the bottom plate is further provided with a second discharge port, and the second discharge port is connected to the water filter cavity and the second water inlet.

[0018] In one embodiment, a sealing member is provided between the mounting seat and the filter bottle, and different sides of the sealing member abut against the mounting seat and the filter bottle respectively.

[0019] In one embodiment, the impeller body includes an impeller shaft and a plurality of blades obliquely arranged on the impeller shaft, and the water flows from the first water inlet and the second water inlet can cause the blades to drive the impeller shaft to rotate.

[0020] In one embodiment, the blade is tilted along the axial direction of the impeller shaft, and one end away from the impeller shaft is curved in the circumferential and axial directions to form a curved surface, and at least part of the blade corresponds to the first water inlet and the second water inlet.

[0021] In one embodiment, the end of the impeller shaft passes through the mounting seat, and the impeller shaft and the outer frame are snap-fitted together through a plurality of first protrusions on the upper end surface of the impeller shaft and a plurality of second protrusions on the bottom of the outer frame.

[0022] In one embodiment, the pre-filter further includes a reversing structure, the reversing structure includes a reversing bottom shell and a movable part, the reversing bottom shell is connected to the mounting seat, and the movable part passes through the impeller assembly and the outer frame.

[0023] In one embodiment, the impeller body is hollow to form a avoidance hole, which passes through the mounting seat for the movable part to pass through.

[0024] In one embodiment, the pre-filter further comprises a water distributor for generating a swirl flow, and the outer frame is further provided with a water flow driving component, and the water flow driving component can drive the outer frame to rotate under the drive of the water flow.

[0025] In one embodiment, the outer frame is further provided with a scraping device for cleaning the filter assembly of the pre-filter and / or the filter bottle of the pre-filter.

[0026] The present invention also provides a water use system, comprising the pre-filter as described above.

[0027] The technical solution of the present invention is to set an exoskeleton and an impeller assembly in the filter bottle. The impeller body rotates under the drive of the water flow, and the exoskeleton is driven to rotate synchronously through the transmission connection. The rotation of the exoskeleton can also promote the swirl of the water flow, further enhancing the automatic cleaning effect. In this way, the pre-filter can more effectively use the power of the water flow itself for automatic cleaning and filtering, reducing the dependence on external energy (such as electricity), thereby improving energy efficiency and achieving energy saving. The exoskeleton is provided with a siphon flow channel, which removes impurities through siphoning, helps to reduce impurity blockage and improves filtration efficiency. Such automatic cleaning and optimized filtration effect reduce the user's maintenance burden and improve the product's ease of use and user satisfaction. Users can enjoy a continuous and efficient water purification experience without frequent manual cleaning of the filter assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 A schematic structural diagram of an embodiment of a pre-filter provided by the present invention;

[0030] Figure 2 for Figure 1 Schematic diagram of the structure after the pre-filter is disconnected from the middle part;

[0031] Figure 3 for Figure 1 Schematic diagram of the structure of the inner and outer skeletons, impeller components and moving parts;

[0032] Figure 4 This is the exploded view after the default impeller body;

[0033] Figure 5 It is a structural schematic diagram of an embodiment of the cooperation between the mounting seat and the impeller body;

[0034] Figure 6 It is a structural schematic diagram of an embodiment of a mounting base;

[0035] Figure 7 It is a structural schematic diagram of an embodiment of an impeller body;

[0036] Figure 8 It is a cross-sectional structural schematic diagram of an embodiment of an impeller assembly and a reversing structure;

[0037] Fig. 9 It is a schematic diagram of the impeller assembly and the reversing structure;

[0038] Fig.10 It is a structural schematic diagram of an embodiment of an exoskeleton;

[0039] Fig.11 This is a structural diagram of the exoskeleton from another perspective.

[0040] Description of Figure Numbers:

[0041] 10. filter bottle; 101. water filter chamber; 102. sewage outlet;

[0042] 20, valve head; 201, water inlet; 202, water outlet;

[0043] 30. Filter component;

[0044] 40. Impeller assembly;

[0045] 410, mounting seat; 401, impeller chamber; 402, first water inlet; 403, second water inlet; 404, drain outlet; 405, water inlet channel; 406, mounting groove;

[0046] 420, first shell; 421, flange; 422, sealing groove; 423, hook; 424, water retaining ring;

[0047] 430, second housing; 431, impeller shaft seat; 432, partition opening; 433, slot; 434, skirt; 435, water guide slope;

[0048] 440, impeller body; 441, impeller shaft; 442, blades; 443, connecting portion; 444, second protrusion; 445, avoidance hole;

[0049] 50, outer frame; 501, siphon flow channel; 501a, side wall flow channel; 501b, bottom flow channel; 502, water flow driving member; 503, first discharge port; 504, second discharge port;

[0050] 510, drum rack; 511, chassis; 512, side frame; 513, first protrusion; 514, water retaining ring; 515, flow channel groove;

[0051] 520, bottom cover;

[0052] 530, siphon member; 531, siphon hole;

[0053] 60. Water distributor;

[0054] 70, reversing structure; 710, reversing bottom shell; 720, movable part; 730, suction cup;

[0055] 80. Sewage discharge assembly;

[0056] 90. Scraping and washing device.

[0057] 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

[0058] 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.

[0059] 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.

[0060] 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.

[0061] Some pre-filters on the market usually have a flushing function, that is, they can be cleaned regularly to discharge the large particles that were previously intercepted, thereby increasing the service life of the pre-filter. Currently, most of them use direct flushing, which has a weak flushing effect and may cause sediments to block the sewage outlet during the drainage process.

[0062] To this end, the present invention proposes a pre-filter and a water use system, which can automatically rotate an exoskeleton by utilizing hydraulic force when water flows through. The rotation of the exoskeleton can also promote the uniform distribution of water around the filter component and improve the filtration efficiency. The impeller component can improve the flushing efficiency of the pre-filter and also improve the drainage efficiency of the pre-filter and promote the discharge of impurities.

[0063] Water use systems, such as whole-house water purification systems, are usually equipped with pre-filters, and use pre-filters to filter large particles from tap water, which 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 usually equipped with a stainless steel filter, which is a physical filtration device that is mainly used to intercept large particles larger than 40 microns to protect the safety of back-end water use.

[0064] See also Figures 1 to 11The pre-filter generally includes a valve head 20, a filter bottle 10, and a filter assembly 30. In one embodiment of the present invention, the pre-filter includes a filter bottle 10 and a valve head 20 connected to the filter bottle 10, a filter assembly 30, an exoskeleton 50, and an impeller assembly 40. The filter bottle 10 has a water filter chamber 101. The water filter chamber 101 is provided with a filter assembly 30 and an exoskeleton 50, and an impeller assembly 40 arranged below the exoskeleton 50. The valve head 20 has a water inlet 201 and a water outlet 202 connected to the water filter chamber 101. The water inlet 201 is connected to the water supply end, and the water outlet 202 is connected to the water use end. "It should be noted that the water supply end can be a tap, a water tower, or well water, and the water use end can be a faucet, a shower, or a drinking water outlet. This application does not make any specific limitations on this.

[0065] A water distributor 60 is arranged in the valve head 20. The water distributor 60 has a spiral flow channel. The raw water entering the valve head 20 from the water inlet 201 forms a vortex after passing through the water distributor 60. The exoskeleton 50 is arranged with a water flow guide and can rotate relative to the filter assembly 30 driven by the water flow. The exoskeleton 50 is provided with a cleaning mechanism to clean the filter screen of the filter assembly 30; and impurities are adsorbed through the siphon flow channel 501 arranged in the exoskeleton 50. The rotation of the exoskeleton 50 generates a vortex, and the water flow of the exoskeleton 50 enters the impeller assembly 40. The exoskeleton 50 is connected to the impeller assembly 40 in a transmission manner. In the first stage, the exoskeleton 50 drives the impeller of the impeller assembly 40 to rotate; in the second stage, the impeller will in turn drive the exoskeleton 50 to rotate, so that the water in the filter bottle 10 generates a vortex and is discharged from the sewage outlet 102 of the filter bottle 10 more quickly.

[0066] A filter assembly 30 is installed inside the pre-filter. The form and structure of the filter assembly 30 are not limited. The filter assembly 30 can be a stainless steel filter or a PP cotton filter. When water flows through, these filters can intercept large particles of impurities in the water, remove some precipitated impurities, rust, sand, mud, bacteria and other particulate impurities generated in the pipeline, and provide better protection for water purifiers, washing machines, showers, high-end faucets, downstream pipelines, etc., reducing the risk of damage to these devices due to clogging by impurities.

[0067] The pre-filter is usually a "T"-shaped structure, with the upper "horizontal" position at the left and right ends being the water inlet and outlet 202 respectively, the lower "vertical" position being the body and the internal cylindrical filter assembly 30, and the bottom being the sewage outlet 102, which is controlled to open and close by a valve.

[0068] The valve head 20 is usually made of copper alloy, and the connection between the valve head 20 and the filter bottle 10 is mainly threaded connection. For example, the valve head 20 is provided with an external threaded tube, and the bottle mouth of the filter bottle 10 is provided with an internal thread threaded with the external threaded tube. In order to reduce the production difficulty of the pre-filter, reduce the inspection requirements of its assembly results, and reduce the material cost of the valve head 20. In this embodiment, the connection between the filter bottle 10 and the valve head 20 is locked by fasteners after splicing.

[0069] Reference Figure 6 and Figure 8 The impeller assembly 40 is arranged in the water filter chamber 101 and is located below the filter assembly 30; the impeller assembly 40 includes a mounting seat 410 and an impeller body 440 rotatably arranged in the impeller chamber 401 of the mounting seat 410; one axial side of the mounting seat 410 is provided with a first water inlet 402 connecting the impeller chamber 401 and the outside of the mounting seat 410; the circumferential side of the mounting seat 410 is provided with a second water inlet 403 connecting the impeller chamber 401 and the outside of the mounting seat 410; the other axial side of the mounting seat 410 is provided with a drain port 404 connecting the impeller chamber 401 and the outside of the mounting seat 410; the drain port 404 is used to communicate with the sewage outlet 102 of the pre-filter.

[0070] In the technical solution of the present invention, when the drain valve is opened, water flows into the filter bottle 10 through the two water inlets of the impeller assembly 40, and the impeller body 440 rotates under the impact of the water flow. This rotational motion can generate a vortex effect, so that the water flow forms a stronger agitation inside the filter bottle 10, thereby more effectively removing impurities and dirt attached to the surface of the filter medium. Compared with static water flow, the dynamic cleaning of the impeller assembly 40 can significantly improve the efficiency and effect of flushing. In addition, the rotational motion of the impeller can stir up the impurities and dirt inside the filter bottle 10, suspending them in the water, and discharge the filter bottle 10 with the water flow through the water outlet 202 and the drain valve, avoiding the re-deposition of impurities on the filter medium, and ensuring the thoroughness of the flushing process. In addition, the impeller assembly 40 can effectively prevent the clogging of the filter medium by enhancing the flushing effect, keep the water flow unobstructed, and maintain the filtering efficiency of the pre-filter. This is crucial to maintaining stable water pressure and clean water quality in home or commercial systems. In addition, the impeller assembly 40 improves flushing efficiency and reduces water waste. The design of the impeller assembly 40 helps to achieve a more environmentally friendly and energy-saving filtering system.

[0071] The impeller assembly 40 is arranged at the sewage outlet 102. The impeller assembly 40 generates centrifugal force by rotating, which can cause the water flowing out of the sewage outlet 102 to generate a vortex, thereby improving the drainage effect. It can also be combined with the exoskeleton 50, and the rotation of the exoskeleton 50 is driven by the water flow, and the exoskeleton 50 is combined with the scraping device 90. The scraper is driven by the rotation of the exoskeleton 50 and / or the impeller assembly 40 to automatically clean the surface of the filter screen, effectively remove impurities attached to the filter screen, and reduce the frequency and difficulty of manual cleaning.

[0072] The present invention improves the impeller assembly 40, and the impeller assembly 40 can be used alone in a traditional pre-filter. Most traditional pre-filters adopt a simple drain valve design, and the drain valve is opened to allow water to flush the surface of the filter assembly 30 to discharge some impurities. However, this method often has low drainage efficiency and is difficult to completely remove stubborn dirt inside the filter assembly 30, especially for small particles and adhesive impurities. The removal effect is not ideal. By setting the impeller assembly 40 in the drainage system and using the water flow power to drive the impeller to rotate, it can not only enhance the flushing force and stirring effect of the water flow, but also improve the drainage efficiency and cleanliness; at the same time, the design of the impeller assembly 40 can be relatively simple, low cost, and no additional energy consumption is required, which helps to reduce the overall operating cost and reduce the waste of water resources.

[0073] Please refer to Figure 2 and Figure 3 In addition, the impeller assembly 40 can also be combined with the scraper 90, and the impeller rotation drives the scraper to automatically clean the filter surface, effectively removing impurities attached to the filter, and reducing the frequency and difficulty of manual cleaning. The scraper 90 can also be arranged on the outer frame 50, and the outer frame 50 can rotate relative to the filter assembly 30 to drive the scraper 90 to clean; in order to improve the sewage discharge effect, the outer frame 50 can also be provided with a siphon flow channel 501.

[0074] The impeller assembly 40 of the technical solution of the present invention can be arranged in a traditional pre-filter with only a filter assembly 30, so as to enhance the flushing force and stirring effect of the water flow, and improve the sewage discharge efficiency and cleanliness; it can also be combined with the scraping device 90, and the scraper can be driven by the rotation of the impeller to automatically clean the filter surface without the need for additional energy consumption, which helps to reduce overall operating costs and reduce water waste; in addition, the first water inlet 402 and the second water inlet 403 are used to increase the water flow path and flow rate entering the impeller chamber 401, and multiple water inlets are set, so that the water flow can form a more complex flow pattern in the impeller chamber 401, providing sufficient power for the rotation of the impeller body 440.

[0075] Please refer to Figures 1 to 3In this embodiment, an exoskeleton 50 is provided in the pre-filter. The specific structure of the exoskeleton 50 can be referred to the introduction below. The impeller body 440 is provided with a connecting portion 443. The exoskeleton 50 is provided with a mounting portion corresponding to the connecting portion 443. The exoskeleton 50 can rotate relative to the filter assembly 30. The connecting portion 443 of the impeller body 440 is transmission-connected to the exoskeleton 50. The rotation of the impeller body 440 can drive the rotation of the exoskeleton 50, thereby further enhancing the water flow stirring effect and improving the sewage discharge efficiency.

[0076] Reference Figures 3 to 7 The impeller chamber 401 is located inside the mounting seat 410 as a closed space for the impeller body 440 to rotate. After the water flows from the filter bottle 10 through the filter assembly 30, part of the water flow (i.e., the sewage to be discharged) enters the impeller chamber 401 through the first water inlet 402 and the second water inlet 403, interacts with the rotating impeller body 440, generates a rotational force and a stirring effect, and helps to flush out the impurities remaining in the filter assembly 30. When the water flows into the impeller chamber 401, it will impact the impeller body 440 and drive it to rotate. The rotating impeller body 440 not only enhances the rotational force and stirring effect of the water flow, but also guides the water flow to the sewage outlet 102 through its specific blade 442 design, thereby improving the sewage discharge efficiency and cleanliness. The drain outlet 404 is set at the bottom or side of the mounting seat 410 (usually connected to the sewage valve), and its main function is to discharge the wastewater treated by the impeller assembly 40 out of the pre-filter.

[0077] In order to facilitate the assembly of the impeller assembly 40, the mounting seat 410 includes a first shell 420 and a second shell 430 that are detachably connected. The second shell 430 covers the first shell 420 to form an impeller chamber 401. The first water inlet 402 and the second water inlet 403 are arranged on the first shell 420, and the drain port 404 is arranged on the second shell 430. The mounting seat 410 is composed of the first shell 420 and the second shell 430, which are tightly combined by a detachable connection method (such as threaded connection, snap connection, bolt fixing, etc.) to form a sealed impeller chamber 401 together, making the maintenance, cleaning and replacement of the impeller assembly 40 more convenient. In order to ensure a stable connection and facilitate tool-free disassembly, the first shell 420 and the second shell 430 are snap-fitted and fixed. The first water inlet 402 and the second water inlet 403 set in the first shell 420 are key channels for water to enter the impeller chamber 401. The positions and sizes of these water inlets are carefully designed to ensure that water can enter the impeller chamber 401 evenly and efficiently and interact effectively with the rotating impeller body 440.

[0078] The second housing 430 is responsible for covering the first housing 420 to form a closed impeller chamber 401. The drain port 404 arranged thereon is connected to the drain valve of the pre-filter and is a channel for the treated wastewater to be discharged. At the same time, the existence of the second housing 430 also enhances the overall structural strength of the mounting base 410, and improves its durability and reliability. If the impeller body 440 or a certain water inlet / drain port 404 component is damaged, the user can replace these components separately without replacing the entire mounting base 410, thereby reducing maintenance costs. This design also allows the user to adjust the position or number of the water inlet and drain port 404 according to actual needs to adapt to pre-filters of different models and specifications. When the impeller assembly 40 needs to be cleaned or replaced, the user only needs to simply disassemble the second housing 430 to easily access the impeller chamber 401 and the impeller body 440 without removing the entire pre-filter.

[0079] In order to ensure the sealing of the impeller chamber 401 and facilitate the assembly of the first shell 420 and the second shell 430, the first shell 420 is provided with a mounting groove 406 for accommodating the impeller body 440, and the inner periphery of the groove of the mounting groove 406 is provided with a hook 423, and the outer periphery of the second shell 430 is provided with a groove 433. The second shell 430 is fixed to the first shell 420 through the hook 423 and the groove 433, and the mounting groove 406 is blocked to form the impeller chamber 401. The first shell 420 is provided with a mounting groove 406 specifically for accommodating the impeller body 440. The inner periphery of the groove of the mounting groove 406 is designed with a hook 423. These hooks 423 are elastic or bendable, and are used to cooperate with the groove 433 of the second shell 430 to achieve a close connection between the two.

[0080] The outer peripheral ring of the second shell 430 is provided with a slot 433. There are multiple hooks 423, and the multiple hooks 423 are evenly distributed along the periphery of the mounting groove 406. These slots 433 correspond to the hooks 423 on the first shell 420, and the number and position are precisely designed to ensure that the two can be docked accurately. The shape and depth of the slot 433 are also optimized to form a good fit with the hook 423, while providing a certain locking force to prevent the second shell 430 from accidentally falling off during use. When the second shell 430 needs to be fixed on the first shell 420, the user only needs to align the slot 433 of the second shell 430 with the hook 423 of the first shell 420, and gently rotate or press the second shell 430 so that the hook 423 can be smoothly inserted into the slot 433. Once the hook 423 completely enters the slot 433 and is locked, the second housing 430 will be firmly fixed to the first housing 420 and cover the notch of the mounting slot 406, thereby forming a closed impeller chamber 401. By covering the notch of the mounting slot 406, the second housing 430 effectively prevents water from leaking out of the impeller chamber 401, ensuring the normal operation of the pre-filter. This design does not require additional fasteners (such as bolts, nuts, etc.), reducing production costs and user maintenance costs.

[0081] In order to further enhance the stability and sealing of the pre-filter impeller assembly 40, a skirt 434 is provided on the circumferential side of the second housing 430, the skirt 434 abuts against the edge of the mounting groove 406, that is, abuts against the lower end surface of the first housing 420, and the skirt 434 forms a step with the side wall of the second housing 430, and the step abuts against the notch of the mounting groove 406. The design of the skirt 434 helps to further seal the impeller chamber 401, and prevent water or impurities from leaking out of the gap between the impeller chamber 401 and the first and second housings 430. The design of the skirt 434 can also make the appearance of the mounting seat 410 more neat and beautiful.

[0082] Reference Figure 4In order to optimize the water flow distribution, a plurality of first water inlets 402 are provided, and the plurality of first water inlets 402 are inclined from the top of the first housing 420 to the bottom of the first housing 420 along the circumferential direction. The circumferential direction can be clockwise or counterclockwise. By providing a plurality of first water inlets 402 at the top of the first housing 420, the water flow path and flow rate entering the impeller chamber 401 can be significantly increased. The plurality of water inlets can distribute the water flow more evenly, and the design of the first water inlet 402 being inclined from the top to the bottom along the circumferential direction helps to guide the water flow to enter the impeller chamber 401 more smoothly. The inclined water inlet can utilize gravity and the power of the water flow itself to make the water flow turn more smoothly and accelerate to enter the impeller chamber 401. The inclined water inlet design can also enhance the rotational force and stirring effect of the water flow. When the water flow enters the impeller chamber 401 at a certain angle, it will produce a stronger interaction with the rotating impeller body 440, thereby improving the sewage discharge efficiency of the pre-filter impeller assembly 40.

[0083] Reference Figure 3 Further, in order to enable the water in the siphon flow channel 501 of the outer frame 50 to flush the impeller assembly 40 and discharge, the first housing 420 is also provided with a water retaining ring 424 for blocking the inflow of water, and the first water inlet 402 is arranged in the water retaining ring 424, and the first water inlet 402 is used to connect the siphon flow channel 501 of the pre-filter. In this embodiment, the bottom of the outer frame 50 is provided with a water retaining ring 514 facing the first housing 420, and the water retaining ring 514 is sleeved with the water retaining ring 424 to form an interlocking structure. Under the joint action of the water retaining ring 514 and the water retaining ring 424, the water flow path in the pre-filter is optimized. Under normal circumstances, the water in the filter bottle 10 is blocked outside the water retaining ring 424, while the water in the siphon flow channel 501 can smoothly enter the first water inlet 402 through the interlocking structure and flow through the impeller assembly 40 for sewage discharge. This design not only ensures the normal filtering function of the pre-filter, but also improves the sewage discharge efficiency and stability.

[0084] In other embodiments, the water retaining ring 424 faces and approaches or abuts against the bottom of the outer frame 50, and does not affect the rotation of the outer frame 50 and the impeller body 440. At the same time, the water flow of the siphon flow channel 501 of the outer frame 50 can also enter the first water inlet 402 through the water retaining ring 424, driving the impeller body 440 to rotate. In this way, the water in the filter bottle 10 is prevented from directly flowing into the first water inlet 402, and the water flow path of the siphon flow channel 501 is cleverly guided.

[0085] In order to facilitate the water flow in the water filter chamber 101 to smoothly enter the impeller assembly 40 after producing the vortex, a plurality of second water inlets 403 with the same circumferential opening are arranged at intervals on the circumferential side of the first shell 420; the second water inlet 403 is provided with a water guiding slope 435 along the water inflow direction; the circumferential side of the first shell 420 is also provided with a water inlet channel 405, which connects the second water inlet 403 and the water filter chamber 101 of the pre-filter, and the flow cross-section of the water inlet channel 405 decreases in the direction away from the second water inlet 403.

[0086] It should be noted that the flow cross section refers to the cross section of the water inlet channel 405 in the axial direction, which gradually decreases along the extending direction away from the second water inlet 403 .

[0087] Reference Figures 1 to 3 The bottom of the outer skeleton 50 and the top of the first shell 420 form an "I" cross-section in the axial direction, and the vertical of the I is a water retaining ring 424. Water in the space on the side of the I can enter the second water inlet 403 from the water inlet channel 405 between the first shell 420 and the cavity wall of the filter bottle 10. In this embodiment, the second water inlet 403 is provided with two circumferentially rotating extensions, and the flow cross-sections of the two water inlet channels 405 are reduced in the direction away from the second water inlet 403. In order to improve the driving effect on the impeller body 440 after water inlet, the second water inlet 403 is provided with a water guiding slope 435 along the water inflow direction, so that the water flow enters the impeller cavity 401 at a certain angle. The water guiding slope 435 can also increase the kinetic energy of the water flow to a certain extent, so that it can interact with the impeller assembly 40 more effectively after entering the impeller cavity 401, thereby improving the sewage discharge effect.

[0088] In addition, the flow cross-section of the water inlet channel 405 decreases in the direction away from the second water inlet 403 (the inlet of the water inlet channel is Z-shaped). This design can produce a Venturi effect, that is, when the water flow passes through a gradually decreasing cross-section, the flow rate will increase and the pressure will decrease. Such a flow rate change helps to enhance the flushing force of the water flow, making it easier for impurities in the water filter chamber 101 to be brought into the impeller assembly 40 for sewage treatment.

[0089] In order to install the impeller body 440 more stably and flexibly, the second housing 430 is provided with an impeller shaft seat 431 for the impeller body 440 to be installed. One end of the impeller body 440 can be rotatably installed on the impeller shaft seat 431, and the other end can be rotatably installed on the first housing 420. The second housing 430 is provided with an impeller shaft seat 431 specifically used for installing the impeller body 440. In one embodiment, one end of the impeller shaft 441 is inserted into the center hole of the impeller shaft seat 431 and fixed by appropriate fasteners (such as nuts, retaining rings, etc.). At the same time, in order to ensure that the impeller body 440 can rotate smoothly, it is also necessary to install lubricating parts such as bearings between the impeller shaft 441 and the shaft seat.

[0090] In this embodiment, the impeller shaft seat 431 protrudes from the surface of the second housing 430, and the impeller shaft seat 431 is provided with a plurality of partition openings 432 recessed downward from the top edge of the impeller seat at intervals along the circumferential direction, and the end of the impeller body 440 contacts the end of the impeller shaft seat 431. The protruding design also helps to disperse the force and vibration generated when the impeller rotates, reduce the direct impact on the second housing 430, and improve the stability and durability of the overall structure.

[0091] Specifically, two adjacent partition openings 432 define an impeller support platform, and there are four support platforms on the impeller shaft seat 431, each distributed at 90 degrees. The bottom of the impeller body 440 contacts the support platform, which provides an upward support force for the impeller body 440. The support platform has a small area, which can reduce the friction of the impeller body 440 and improve the rotation efficiency.

[0092] In order to improve the drainage efficiency, the drain port 404 is arranged in the second housing 430, and the drain port 404 is provided with a plurality of drain ports 404, and the plurality of drain ports 404 surround the impeller seat, and the plurality of drain ports 404 are arranged around the impeller seat, and such a layout helps to more evenly disperse the water discharged from the impeller assembly 40 to the outside of the pre-filter. When the impeller rotates and pushes the water flow, the water will flow along the circumference of the impeller seat and be smoothly discharged through these surrounding drain ports 404. This layout reduces the concentration and conflict of the water flow during the discharge process and improves the drainage efficiency. The plurality of drain ports 404 are all arranged at an angle; each drain port 404 is designed to be inclined, which means that their opening direction is not completely perpendicular to the surface of the second housing 430, but has a certain inclination angle. This inclined setting helps to guide the water flow to flow out of the drain port 404 more smoothly and reduce the resistance of the water flow at the outlet. The plurality of drain ports 404 are of the same size and / or shape. The plurality of drain ports 404 are designed to be the same in size and / or shape, and such a design is conducive to maintaining the consistency and interchangeability of the drain ports 404. Drain ports 404 of the same size can ensure that the drainage capacity of each drain port 404 is similar, thereby avoiding problems such as poor drainage or water flow concentration caused by uneven sizes of the drain ports 404. At the same time, drain ports 404 of the same shape are also easy to process and install, thereby improving production efficiency and product quality. Specifically, the bottom cover 520 is designed with four elliptical water outlets, each distributed at 90°.

[0093] Reference Figure 7In one embodiment, the other end of the impeller body 440 is rotatably mounted on the first housing 420 through a corresponding structure. In this embodiment, the end of the impeller body 440 passes through the first housing 420, and the impeller body 440 is hollow so that the reversing rod of the reversing structure 70 can be movably passed through. The end of the impeller body 440 exposed to the first housing 420 is provided with a connecting portion 443 which is transmission-connected with the outer frame 50, so that the outer frame 50 can first drive the impeller body 440 to rotate, and then the impeller body 440 drives the outer frame 50 to rotate. The impeller shaft seat 431 is hollow to form an avoidance hole 445, and the avoidance hole 445 is used for the movable part 720 of the pre-filter to pass through. The second housing 430 is formed with a guide shaft cylinder corresponding to the avoidance hole 445 in the extension away from the impeller shaft seat 431, referring to Figure 8 A suction cup 730 is provided at the end of the guide rod, and a plurality of snap rings are provided at the outer periphery of the second shell 430. The snap rings are used for snapping the reversing bottom shell 710 of the pre-filter. A reversing cavity for accommodating and moving the suction cup 730 is formed between the reversing bottom shell 710 and the second shell 430. The suction cup 730 moves up and down along the axial direction under the action of the water flow.

[0094] When the drain valve is opened, water flows in through the two water inlets of the impeller assembly 40, and the impeller body 440 rotates under the impact of the water flow. In order to improve the drainage efficiency, the impeller assembly 40 is sealed and connected to the filter bottle 10.

[0095] Combination Figure 6 and Fig. 9 Specifically, the mounting seat 410 is sealed and connected to the filter bottle 10; the first water inlet 402 and the second water inlet 403 are connected to the water filter chamber 101, and the drain port 404 is connected to the sewage outlet 102. Wastewater enters the impeller assembly 40 from the first water inlet 402 and the second water inlet 403, and is discharged from the filter bottle 10 from the sewage outlet 102 through the drain port 404.

[0096] When the drain valve is opened, water enters the impeller chamber 401 through the first water inlet 402 and the second water inlet 403 on the mounting seat 410. In the impeller chamber 401, the impact of the water flow causes the impeller body 440 to rotate, further pushing the water flow and generating centrifugal force. This centrifugal force helps to push the impurities and residues in the water to the edge of the impeller chamber 401 and gather together. Finally, the waste water containing impurities is discharged from the filter bottle 10 through the drain port 404 on the mounting seat 410, completing the water purification and sewage discharge process.

[0097] Common methods for flushing the pre-filter include the following: direct flushing mode and back flushing mode. In direct flushing mode, water flushes the intercepting surface of the filter assembly 30 along the flow direction of tap water, and the particulate impurities on the filter are flushed out with the water flow. Back flushing mode involves reverse water flow flushing. The tap water pressure penetrates from the inner wall to the outer wall of the filter, forming a high-flow water column, flushing and discharging the particulate impurities on the filter from the inside out.

[0098] The impeller assembly 40 can be used in both the direct flushing mode and the back flushing mode. The impeller assembly 40 can also be used in conjunction with the siphon mode. The siphon mode usually adds an exoskeleton 50 to the pre-filter. The exoskeleton 50 is provided with a siphon flow channel 501, and the suction force generated by the siphon principle is used to help remove impurities accumulated on the filter. The structural form of the exoskeleton 50 and the connection relationship with the impeller assembly 40 can be referred to the above description, and will not be repeated here.

[0099] The sealed connection between the impeller assembly 40 and the filter bottle 10 ensures the airtightness of the system and avoids inconveniences such as water leakage during use. In this embodiment, a seal is provided between the base and the filter bottle 10, and different sides of the seal are respectively abutted against the mounting seat 410 and the filter bottle 10 to achieve sealing between the two. In this embodiment, the seal is configured as a sealing ring, the inner peripheral side of the sealing ring abuts against the mounting seat 410, and the outer peripheral side of the sealing ring abuts against the filter bottle 10. In other embodiments, the seal can also be a gasket, a sealing tape, a water seal, a sealant, a soft filler, etc.

[0100] Reference Figure 2 In order to facilitate the installation of the sealing ring, a sealing groove 422 is provided on the peripheral side of the base, and the sealing ring is installed in the sealing groove 422. The material of the sealing ring is rubber suitable for drinking water or hot water, such as natural rubber, silicone rubber, etc.

[0101] The first shell 420 is abutted and sealed with the cavity wall of the filter bottle 10 through the sealing ring in the sealing groove 422 on the flange 421 on the outer peripheral side, and in order to achieve a better abutting and sealing effect, the peripheral side surface of the flange 421 is adapted to the contour of the inner wall surface of the filter bottle 10. The first shell 420 is abutted and sealed with the cavity wall of the filter bottle 10 through the sealing ring in the sealing groove 422 on the flange 421 on the outer peripheral side, and in order to achieve a better abutting and sealing effect, the peripheral side surface of the flange 421 is adapted to the contour of the inner wall surface of the filter bottle 10. The contour of the cavity wall of the filter bottle 10 is an arc. In order to ensure a close fit and further improve the sealing effect, the contour of the flange 421 is adapted to the contour of the cavity wall of the filter bottle 10.

[0102] After the flange 421 and the cavity wall of the filter bottle 10 are sealed against the sealing ring, a water inlet channel is formed between the outer peripheral side of the first shell 420 and the cavity wall of the filter bottle 10, and the swirling water flow can enter the impeller cavity 401 from the second water inlet 403 through the water inlet channel.

[0103] The above generally introduces the structure of the impeller assembly 40; the following introduces the overall matching relationship between the impeller assembly 40 and the outer frame 50 based on the sealed connection between the impeller assembly 40 and the filter bottle 10.

[0104] Specifically, the impeller body 440 includes an impeller shaft 441 and a plurality of blades 442 obliquely arranged on the impeller shaft 441. The water flow from the first water inlet 402 and the second water inlet 403 can cause the blades 442 to drive the impeller shaft 441 to rotate. In order to increase the contact area of ​​the impeller with the water flow and improve the driving effect of the impeller, the blades 442 are obliquely arranged along the axial direction of the impeller shaft 441, and one end away from the impeller shaft 441 is curved in the circumferential direction and the axial direction to form a curved surface, and at least part of the blades 442 corresponds to the first water inlet 402 and the second water inlet 403.

[0105] Reference Fig.10 , a water flow driving member 502 is arranged on the inner circumference of the outer frame 50. When the pre-filter is filtering water normally, the water coming in from the valve head 20 forms a vortex through the upper water distributor 60 of the filter assembly 30, and the flushing water flow driving member 502 drives the outer frame 50 to rotate. At this time, the rotation of the outer frame 50 does not rely on the bottom impeller to drive, and the bottom impeller body 440 is not hydraulically flushed during normal filtering. In the sewage discharge state, the bottom impeller body 440 rotates by water flow flushing, driving the outer frame 50 to rotate together, so the outer frame 50 can rotate in both filtering and sewage discharge states. The bottom of the outer frame 50 is clamped with the impeller body 440, and the two sides of the first shell 420 have a second water inlet hole, and a sealing groove 422 is designed in the side ring for installing a sealing ring, and sealing with the filter bottle 10 body, to ensure that all water flows in through the first water inlet 402 and the second water inlet 403 of the impeller assembly 40 during sewage discharge, thereby improving the rotation efficiency of the impeller body 440. The second housing 430 and the reversing bottom housing 710 are fixed by snapping.

[0106] Reference Figure 1 In order to facilitate standardized production, the pre-filter also includes a sewage discharge component 80, which acts as a switch to connect or disconnect the water filter chamber 101 with the outside.

[0107] Reference Figure 3 and Figure 8 In one embodiment, the pre-filter is provided with a reversing structure 70, and the sewage discharge assembly 80 is detachably connected to the reversing bottom shell 710, for example, fixed by screws; of course, the reversing bottom shell 710 and the sewage discharge assembly 80 are also fixed by snap-fitting.

[0108] In one embodiment, the sewage discharge assembly 80 is detachably connected to the mounting seat 410 ; for example, the sewage discharge assembly 80 replaces the reversing bottom shell 710 and is fixed to the mounting seat 410 .

[0109] The sewage discharge assembly 80 is connected to the impeller assembly 40 or is connected to the impeller assembly 40 through the reversing structure 70, which helps to better fix the impeller assembly 40 in the filter bottle 10, and also facilitates the standardized production of the filter bottle 10. Modular replacement can be achieved by simply replacing the sewage discharge assembly 80 or the reversing structure 70.

[0110] The end of the impeller shaft 441 passes through the mounting seat 410, and the impeller shaft 441 is connected to the outer frame 50 through a limiting structure. The limiting structure includes a plurality of first protrusions 513 provided on the upper end surface of the impeller shaft 441 and a plurality of second protrusions 444 provided on the bottom of the outer frame 50, and the first protrusions 513 and the second protrusions 444 are engaged with each other.

[0111] The bottom of the outer skeleton 50 is provided with a plurality of second protrusions 444 (6 in this embodiment, and may also be 5, 7, 8, etc.), and the second protrusion 444 cooperates with the first protrusion 513 connecting part 443 of the impeller body 440. The connecting part 443 is also configured as a protrusion, and the grooves between the first protrusion 513 and the second protrusion 444 are fixed in place to form a transmission structure. The rotation of the impeller body 440 can drive the skeleton to rotate; similarly, the rotation of the outer skeleton 50 can drive the rotation of the impeller body 440.

[0112] A water retaining ring 514 is designed at the bottom of the outer frame 50, which cooperates with the water retaining ring 424 of the first shell 420 to prevent excessive water in the filter bottle 10 from flowing into the first water inlet 402 at the top of the first shell 420. The water retaining ring 514 at the bottom of the outer frame 50 has an inclined first discharge port 503 of the siphon flow channel 501, and the first discharge port 503 can directly flow into the first water inlet 402 at the top of the first shell 420.

[0113] The first shell 420 is designed with second water inlets 403 on two sides, and water in the filter bottle 10 other than the siphon flow channel 501 can enter from these two second water inlets 403 during sewage discharge. Four oblique first water inlets 402 are designed on the top of the first shell 420, and water flowing out of the siphon flow channel 501 enters the impeller chamber 401 through the first water inlet 402. A water retaining ring 424 is designed on the top of the first shell 420, which cooperates with the water retaining ring 424 of the outer frame 50 to prevent excessive water from the outside from flowing into the first water inlet 402 on the top of the first shell 420.

[0114] The first housing 420 is provided with a sealing groove 422 in an annular direction for installing the sealing ring and sealing the filter bottle 10. A large opening structure is provided in the middle of the four first water inlets 402 at the top of the first housing 420, and the upper part of the impeller body 440 extends out of the avoidance hole 445. The end protrusion structure of the impeller body 440 is fixed to the protrusion structure at the bottom of the outer frame 50, and the two are connected in a transmission manner.

[0115] The impeller body 440 is composed of multiple blades 442 tiltedly arranged on the impeller shaft 441, and one side of the tilted blade 442 is bent into an arc surface, with part of the arc surface facing the first water inlet 402 and part of it facing the second water inlet 403. In this way, the blade 442 can rotate under the combined action of the water flow from the second side water inlet 403 and the first top water inlet 402.

[0116] The middle of the impeller body 440 is a hollow structure, and the vertical rod structure of the movable part 720 extends from this position and is inserted into the bottom of the outer frame 50. The impeller body 440 can rotate around the vertical rod structure of the reversing rod. Four elliptical drain holes 404 are designed near the impeller shaft seat 431 of the second housing 430. When draining, the water in the impeller cavity 401 flows out from the drain holes 404.

[0117] A circular hole is designed at the center of the upper portion of the first shell 420 , and the vertical rod structure of the movable member 720 is inserted into the circular hole and extends all the way to the bottom of the outer frame 50 .

[0118] The outer periphery of the bottom of the second shell 430 is designed with multiple snap ring structures, and the snap rings are fixed with the hook 423 of the reversing bottom shell 710. The vertical rod structure of the movable part 720 is provided with a suction cup 730 that moves up and down in the reversing bottom shell 710. When the waterway needs to be switched (for example, when switching between direct flushing and back flushing), the suction cup 730 of the movable part 720 moves in the reversing bottom shell 710 under the action of water pressure. The vertical rod structure of the movable part 720 extends from the first shell 420 and is finally inserted into the bottom of the outer skeleton 50. The first shell 420 and the first shell 420 do not rotate, and the impeller body 440 in the impeller chamber 401 can rotate around the vertical rod structure of the movable part 720. The movable part 720 also does not rotate. The lower part of the vertical rod structure of the movable part 720 is connected to a round suction cup 730, and the suction cup 730 can move up and down in the reversing bottom shell 710.

[0119] Combination Figure 8 and Fig. 9 , four snap rings are designed under the reversing bottom shell 710, and the snap rings can be fixed to the sewage discharge assembly 80 below. The fixing method is similar to the fixing method of the impeller bottom cover 520 and the reversing bottom shell 710. Four snap rings are designed for the second shell 430, and four hooks 423 are designed in an annular direction on the reversing bottom shell 710. The upper part of the hook 423 has a chamfer to facilitate assembly with the snap ring. The water flowing out of the second discharge port 504 flows out from the water outlet in the middle of the suction cup 730, and is finally discharged through the sewage discharge assembly 80. A sealing groove 422 is designed on the outer periphery of the suction cup 730 for installing a sealing ring and sealing with the inner wall of the reversing bottom shell 710, thereby increasing the water pressure of the suction cup 730, ensuring that all water flows out from the water outlet of the suction cup 730, and improving the reversing force.

[0120] In the present invention, the siphon flow of the exoskeleton 50 is also improved. The exoskeleton 50 can be arranged in the water filter chamber 101 alone, or can be used in combination with the impeller assembly 40. The structural improvement of the siphon flow channel 501 of the exoskeleton 50 is introduced below.

[0121] During the use of the pre-filter, impurities attached to the surface of the filter need to be cleaned in situ from time to time and then discharged through the drain valve. The efficient operation of the scraping device 90 is crucial. In the prior art, there are scraping devices 90 driven by motors, scraping devices 90 driven by impellers, etc.; there is also a self-rotating scraping function that uses the impact force of the water flow itself.

[0122] In order to improve the cleaning effect, the prior art utilizes the siphon principle and sets a siphon channel 501 on the outer frame 50. The siphon channel 501 can generate strong suction to improve the cleaning efficiency. However, the structure of the existing siphon channel 501 is complex, the siphon flushing effect is poor, and the impurities on the filter surface cannot be adsorbed in all directions.

[0123] To this end, the present invention improves the siphon tube structure and installation method of the outer frame 50 to facilitate processing to form the siphon flow channel 501 and to facilitate cleaning of the siphon flow channel 501 to avoid blockage and affect the siphon effect.

[0124] In one embodiment of the present invention, the exoskeleton 50 includes a cartridge rack 510 and a bottom cover 520, the cartridge rack 510 includes a bottom plate 511 and a side frame 512 disposed on the bottom plate 511, the siphon channel 501 includes a side wall channel 501a and a bottom channel 501b connected to the side wall channel 501a, the side wall channel 501a is disposed corresponding to the side frame 512, the side wall channel 501a is provided with a siphon hole 531 connected to the inner side of the cartridge rack 510; the bottom plate 511 is provided with a first discharge port 503 connected to the outside of the cartridge rack 510, the bottom channel 501b is connected to the first discharge port 503, the bottom cover 520 covers the bottom plate 511 to form the bottom channel 501b or the bottom channel 501b is disposed on the bottom cover 520.

[0125] The exoskeleton 50 of the technical solution of the present invention can be used in the pre-filter. On the one hand, the exoskeleton 50 serves as a supporting structure between the filter assembly 30 and the filter bottle 10, effectively enhancing the stability of the entire pre-filter; on the other hand, through its specific shape and layout, it guides the water flow to pass through the filter assembly 30 more smoothly, thereby improving the filtering efficiency; through the multiple siphon holes 531 of the lateral flow channel, the impurities, particulate matter, etc. intercepted by the filter assembly 30 can be more effectively guided to the bottom flow channel 501b, and finally discharged through the sewage outlet 102. By designing the bottom flow channel 501b between the bottom plate 511 and the bottom cover 520, compared with setting the through bottom flow channel 501b inside the bottom plate 511, on the one hand, the structure is simple and the manufacturing is convenient; on the other hand, it is convenient to clean, reducing the possibility of dirt accumulating inside and clogging the filter screen, and avoiding siphon failure; and compared with the existing solution, it is easier to increase the size of the siphon flow channel 501 and improve the cleaning effect.

[0126] The siphon flow channel 501 is in an "L" shape, the side wall flow channel 501a is the vertical part of the "L" shape, the bottom flow channel 501b is the horizontal part of the "L" shape, and the side wall flow channel 501a is arranged corresponding to the side frame 512, which means that the side wall flow channel 501a is arranged on the side frame 512 part, and does not limit the formation method of the side wall flow channel 501a.

[0127] The exoskeleton 50 forms a bottom channel 501b of the siphon channel 501 through the bottom cover 520 and the bottom plate 511. In one embodiment, the exoskeleton 50 is sleeved with the filter assembly 30, and the exoskeleton 50 or the filter assembly 30 is provided with an electric / manually driven cleaning mechanism, which cleans the impurities attached to the surface of the filter net and then discharges them through the drain valve; through the multiple siphon holes 531 of the lateral flow channel, the impurities, particulate matter, etc. intercepted by the filter assembly 30 can be more effectively guided to the bottom channel 501b, and finally discharged through the drain outlet 102. In one embodiment, the exoskeleton 50 can rotate relative to the filter assembly 30. For example, the exoskeleton 50 is provided with an electric drive rotation structure or a manual drive rotation structure to drive the exoskeleton 50 to rotate; or, the exoskeleton 50 is driven by the raw water entering the filter bottle 10 to rotate relative to the filter assembly 30, so that the water in the filter bottle 10 generates a vortex and is discharged from the sewage outlet 102 of the filter bottle 10 more quickly; in a further solution, the exoskeleton 50 can also be provided with a scraping and washing device 90. During the rotation of the exoskeleton 50 with the water flow, the scraping and washing device 90 cleans the impurities on the filter screen, and the impurities are sucked into the siphon channel 501 through the siphon hole 531, and discharged into the sewage outlet 102 through the first discharge port 503.

[0128] The bottom plate 511 and the side frame 512 may be integrally formed, or the side frame 512 may be fixed to the bottom plate 511 by screws or the like. The bottom plate 511 of the cartridge holder 510 is circular, and the side frame 512 surrounds the bottom plate 511 and is designed around the outer edge of the filter assembly 30. The side frame 512 is generally a part of a ring or cylinder, but is not completely closed to allow water to flow through. The shape of the side frame 512 matches the shape of the filter assembly 30, ensuring that it can fit tightly and support the filter assembly 30, while maintaining effective circulation of water around the filter assembly 30.

[0129] In one embodiment, the bottom cover 520 and the bottom plate 511 are covered to form the bottom flow channel 501b. In one embodiment, the bottom flow channel 501b is provided on the bottom cover 520. To facilitate disassembly, the bottom cover 520 and the bottom plate 511 are detachably connected, such as by screw locking, snap connection, etc. The detachable bottom cover 520 design makes cleaning and maintenance simple and convenient, and users can complete these tasks by themselves without having to invite professionals to provide door-to-door service, thereby reducing maintenance costs.

[0130] Reference Fig.11 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 with the side wall flow channel 501a, and the groove bottom of the flow channel groove 515 opposite 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 less 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.

[0131] In order to ensure stability, the bottom cover 520 is provided with a flow channel groove 515, and the outer side wall of the flow channel groove 515 is provided with a buckle, and the bottom cover 520 is provided with a buckle groove corresponding to the buckle, and the bottom cover 520 is fixed to the chassis 511 by the buckle and the buckle groove. This stability can be further enhanced by the design of the buckle and the buckle groove. The close fit between the buckle and the buckle groove 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 and the buckle groove 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 sealing problems or structural instability caused by improper installation. The design of the buckle and the buckle groove makes the removal and installation of the bottom cover 520 easier and faster.

[0132] For the convenience of manufacturing, the buckle is arranged on the opposite sides of the flow channel groove 515, and the chassis 511 is provided with an avoidance gap that passes through the chassis 511 corresponding to the buckle. After the bottom cover 520 is covered with the chassis 511, the bottom cover 520 blocks the avoidance gap. By arranging the buckles on the opposite sides of the flow channel groove 515 and opening the avoidance gap on the chassis 511, the mold design and manufacturing process are simplified. The setting of the avoidance gap makes it easier to form the buckle structure in the manufacturing process such as injection molding or stamping, reducing the manufacturing cost and difficulty. Although the opening of the avoidance gap 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 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 avoidance gap is completely blocked after the bottom cover 520 is covered with the chassis 511, and will not affect the appearance of the pre-filter. This helps to enhance the overall image of the product and the visual experience of the user. The buckle design 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.

[0133] Specifically, a plurality of first discharge ports 503 are arranged at intervals along the circumference of the cartridge rack 510, and the number of the first discharge ports 503 corresponds to the number of the 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 cartridge rack 510, the bottom cover 520 includes a plurality of cover parts, and the cover parts and the bottom plate 511 are enclosed to form a bottom channel 501b. By designing a plurality of cover parts to be connected to the cartridge rack 510, each cover part and the bottom plate 511 are enclosed to form a bottom channel 501b, so that the connection between the bottom cover 520 and the cartridge rack 510 is more convenient and accurate.

[0134] Specifically, the siphon flow channel 501 is provided with three, and the three covering parts are like "fan blades". Each siphon flow channel 501 is provided with an independent first discharge port 503. In order to drain water smoothly, the first discharge port 503 is tilted in the same direction from the upper surface of the chassis 511 to the lower surface. The inclined drain port 404 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 tilted clockwise or counterclockwise along the axial direction. The tilted 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 port 503 is arranged at the end of the bottom flow channel 501b.

[0135] The side frame 512 extends in the axial direction, the filter assembly 30 is arranged in the side frame 512, and the side frame 512 forms a side wall flow channel 501a constituting the siphon flow channel 501. There are multiple side wall flow channels 501a, such as two, three or even more. Siphon holes 531 are arranged on the side wall, which are part of the side wall flow channel 501a and are used to guide water flow from the outside of the filter assembly 30 through the side wall flow channel 501a into the bottom flow channel 501b. The size, number and distribution of the siphon holes 531 are carefully designed to ensure uniform distribution of water flow and effective filtration.

[0136] 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.

[0137] 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, in order to facilitate and firmly install, the siphon member 530 is slidably connected to the side frame 512, and the siphon member 530 is snap-fitted and fixed to the side frame 512. By introducing the design of the slideway and the slide rail, 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.

[0138] Specifically, a slideway is convexly provided on the inner surface of the side frame 512, and the slide grooves extend to both ends of the side frame 512 respectively. Slide rails are provided on both sides of the siphon member 530, and the siphon member 530 is inserted into the slideway through the slide rails. The matching design of the slide rails and the slideway can ensure that the position of the siphon member 530 on the side frame 512 is more stable, reducing the risk of loosening or displacement caused by vibration or water flow impact, thereby improving the overall stability and reliability of the pre-filter. The stable connection method reduces the risk of failure caused by loose or displacement of components, and improves the overall performance and reliability of the pre-filter.

[0139] In order to improve the consistency of appearance and enhance the stability of the connection, the connection method between the side frame 512 and the siphon member 530 is further defined. Specifically, a mounting notch is provided at the top edge of the side frame 512, and a mounting block is provided at the top of the siphon member 530 toward the side frame 512. The mounting block is embedded in the mounting notch, and the top of the siphon member 530 is flush with the top edge of the side frame 512. By adding the mounting notch and the matching design of the mounting block, the connection between the siphon member 530 and the side frame 512 is more stable. After the mounting block is embedded in the mounting notch, it can effectively prevent the siphon member 530 from moving in the horizontal direction, further improving the stability of the connection. The top of the siphon member 530 is flush with the top edge of the side frame 512, which not only enhances the overall aesthetics of the pre-filter, but also avoids the abruptness caused by the different heights of the components, and enhances the overall texture of the product. The matching design of the installation block and the installation notch makes the installation process of the siphon component 530 more intuitive and simple. The user only needs to align the installation block with the installation notch and embed it, without the need for additional fixing steps, thereby simplifying the installation process.

[0140] In order to achieve the snap-fit ​​fixation between the siphon member 530 and the side frame 512, the siphon member 530 is also provided with a fixing clamping protrusion, and the side frame 512 is also provided with a fixing slot 433 that penetrates the side frame 512 below the installation notch. The siphon member 530 is snap-fitted to the side frame 512 by the fixing clamping protrusion and the fixing slot 433. On the basis of the installation notch and the installation block, the snap-fit ​​fixation between the siphon member 530 and the side frame 512 is achieved by adding the fixing clamping protrusion and the fixing slot 433, which significantly improves the stability and reliability of the fixation. The traditional fixing method may require additional fasteners (such as screws, nuts, etc.), and the installation process is cumbersome and time-consuming. The snap-fit ​​fixing method simplifies the installation steps, improves the installation efficiency, and reduces the difficulty and cost of installation.

[0141] To enhance drainage efficiency, the chassis 511 is also provided with a second discharge port 504, which communicates the inner side of the cartridge rack 510 and the outer side of the cartridge rack 510. The addition of the second discharge port 504 provides an additional discharge channel for the accumulated water inside the cartridge rack 510, which helps to speed up the water flow and improve drainage efficiency. During the use of the filter, especially under high flow or high pressure conditions, this design can significantly reduce the risk of water accumulation inside the cartridge rack 510 and ensure the smooth operation of the filter. By discharging the accumulated water inside the cartridge rack 510 in a timely manner, the retention time of water between the filter assembly 30 and the cartridge rack 510 can be reduced, which helps to improve the overall filtering effect of the pre-filter.

[0142] According to the water accumulation inside the drum rack 510 and the drainage requirements, a plurality of second discharge ports 504 can be provided on the chassis 511. These second discharge ports 504 can be evenly distributed or arranged in a targeted manner according to the water accumulation area to maximize the drainage efficiency. Specifically, a plurality of second discharge ports 504 are provided, and a second discharge port 504 is provided between two adjacent siphon channels 501 and close to the outside of the chassis 511 relative to the first discharge port 503. The second discharge port 504 is arranged at a position symmetrical to the first discharge port 503 to maintain the balance and beauty of the overall structure. This arrangement also helps to disperse the drainage pressure and improve the drainage efficiency.

[0143] Specifically, in this embodiment, three siphon channels 501 are designed on the outer frame 50, and the three siphon channels 501 are evenly distributed at 120 degrees. Seven siphon holes 531 are designed on the wall of the siphon member 530, and the shape of the siphon holes 531 is elliptical. The number and layout of the siphon holes 531 are related to the number and structure of the modules of the filter assembly 30, and can be flexibly arranged. The water inside the siphon channel 501 flows to the bottom channel 501b and flows out from the first discharge port 503. The three siphon channels 501 at the bottom of the outer frame 50 are designed with an angled first discharge port 503 near the center. The first discharge port 503 is set at an oblique angle so that the water flow can be inclined to enter the bottom impeller assembly 40, thereby improving the rotation efficiency of the impeller; in the scheme where the impeller assembly 40 is not set, the siphon flow channel 501 is directly connected to the sewage outlet 102 through the impeller; the sewage valve is opened, and the negative pressure generated by the siphon effect is used to adsorb impurities on the surface of the filter screen, thereby reducing the adhesion of impurities and improving the filtering effect; by designing the bottom flow channel 501b between the bottom plate 511 and the bottom cover 520, compared with setting a through bottom flow channel 501b inside the bottom plate 511, on the one hand, the structure is simple and the manufacturing is convenient; on the other hand, it is easy to clean, reducing the possibility of dirt accumulating inside and clogging the filter screen, thereby avoiding siphon failure; and compared with the existing scheme, it is easier to increase the size of the siphon flow channel 501 and improve the cleaning effect.

[0144] Specifically, in one embodiment, the outer frame 50 can be rotatably mounted on the filter assembly 30, and a central portion of the chassis 511 is provided with an avoidance shaft hole for the movable member 720 to pass through, and the outer frame 50 rotates relative to the filter assembly 30 along a first circumferential direction.

[0145] By adding the avoidance shaft hole on the bottom cover 520, the movable part 720 can be stably and accurately installed in the outer frame 50, avoiding position deviation or instability during the installation process. The outer frame 50 can rotate relative to the filter assembly 30 along the first circumferential direction; the first circumferential direction is the rotation direction, or the swirl direction; in this embodiment, the outer frame 50 rotates relative to the filter assembly 30, and the outer frame 50 can be rotated by electric drive or manual drive to generate a swirl in the water filter chamber 101. It can also be that a water distributor 60 that changes the direction of water flow is provided on the top of the pre-filter, and the outer frame 50 is provided with a water flow driving member 502, so that the outer frame 50 can rotate with the help of water flow; and a brush or other structure can be further provided on the outer frame 50 to clean the filter screen of the filter assembly 30, so as to achieve the effect of cleaning and improving the sewage discharge; and an impeller assembly 40 is further provided at the bottom of the pre-filter to drive the water flow of the water filter chamber 101 to rotate, so as to improve the discharge of sewage during the flushing process.

[0146] The present invention also provides a water system, which includes the aforementioned pre-filter. The specific structure of the pre-filter is as follows: Figures 1 to 11 Since the water use system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0147] Among them, the water use system at least includes relevant components from the pre-filter to the water use end. For example, the water use system may include household appliances such as water heaters, dishwashers, and water dispensers, and may also include accessories such as water pipes for domestic water use throughout the house.

[0148] 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 filter bottle, provided with a water filter cavity and a sewage outlet connected to the water filter cavity; A filter assembly is disposed in the water filter cavity; An outer frame is provided with a siphon flow channel; the outer frame is sleeved with the filter assembly and can rotate relative to the filter assembly; as well as An impeller assembly is arranged in the water filter chamber, and the impeller assembly includes a mounting seat and an impeller body rotatably arranged in the impeller chamber of the mounting seat; the exoskeleton is transmission-connected to the impeller body, and the mounting seat is provided with a first water inlet connected to the siphon flow channel, and a drain outlet connected to the sewage outlet.

2. The pre-filter according to claim 1, characterized in that: The mounting seat comprises a first shell and a second shell which are detachably connected, the second shell covers the first shell to form the impeller chamber, the first shell has a flange protruding from the outer peripheral side, and the sealing groove is arranged on the flange.

3. The impeller assembly according to claim 2, characterized in that An impeller shaft seat for mounting an impeller body is disposed on the second housing. One end of the impeller body can be rotatably mounted on the impeller shaft seat, and the other end can be rotatably mounted on the first housing.

4. The impeller assembly according to claim 3, characterized in that: The impeller shaft seat protrudes from the surface of the second shell, and the impeller shaft seat is provided with partition openings recessed downward from the top edge of the impeller shaft seat at intervals along the circumferential direction.

5. The impeller assembly according to claim 2, characterized in that: The first shell is provided with a mounting groove for accommodating the impeller body, the inner periphery of the groove of the mounting groove is provided with a hook, the outer periphery of the second shell is provided with a slot, the second shell is fixed to the first shell by the hook and the slot, and covers the mounting groove to form the impeller cavity.

6. The impeller assembly according to claim 2, characterized in that: A skirt is provided on the peripheral side of the second shell, and the skirt abuts against the edge of the first shell.

7. The pre-filter according to claim 1, characterized in that: There are multiple first water inlets, and the multiple first water inlets are inclined from the top of the mounting seat toward the bottom of the mounting seat along the first rotation direction.

8. The pre-filter according to claim 1, characterized in that: A water retaining ring is provided at the bottom of the outer frame, and a water retaining ring is provided at the mounting seat. The water retaining ring and the water retaining ring cooperate to form a water retaining channel, and the siphon flow channel and the first water inlet are connected through the water retaining channel.

9. The impeller assembly according to claim 1, wherein: A plurality of second water inlets with the same circumferential opening are arranged at intervals on the circumferential side of the mounting seat; and a water guiding slope is arranged at the second water inlet along the water inflow direction.

10. The pre-filter according to claim 9, characterized in that: The exoskeleton comprises: A cartridge rack, the cartridge rack comprising a bottom plate and a side frame arranged on the bottom plate, the siphon flow channel comprising a side wall flow channel and a bottom flow channel connected to the side wall flow channel, the side wall flow channel being arranged corresponding to the side frame, and the side wall flow channel being provided with a siphon hole connected to the inner side of the cartridge rack; and A bottom cover is formed by covering the bottom plate with the bottom plate to form the bottom flow channel. The bottom plate is provided with a first discharge port connected to the outside of the cartridge rack. The bottom flow channel is connected to the first discharge port and the first water inlet.

11. The pre-filter according to claim 10, characterized in that: The chassis is also provided with a second discharge port, and the second discharge port is connected with the water filter cavity and the second water inlet.

12. The pre-filter according to claim 10, characterized in that: The bottom plate is convexly provided with a flow channel groove, which is open upwards, and the notch of the flow channel groove is communicated with the side wall flow channel, and the bottom cover is covered with the flow channel groove to form the bottom flow channel.

13. The pre-filter according to claim 1, characterized in that: A sealing member is provided between the mounting seat and the filter bottle, and different sides of the sealing member abut against the mounting seat and the filter bottle respectively.

14. The pre-filter according to claim 1, characterized in that: The impeller body includes an impeller shaft and a plurality of blades obliquely arranged on the impeller shaft. The water flows from the first water inlet and the second water inlet can cause the blades to drive the impeller shaft to rotate.

15. The pre-filter according to claim 14, characterized in that: The blade is tilted along the axial direction of the impeller shaft, and one end away from the impeller shaft is bent in the circumferential and axial directions to form a curved surface. At least part of the blade corresponds to the first water inlet and the second water inlet.

16. The pre-filter according to claim 14, characterized in that: The impeller body is provided with a connecting portion, and the connecting portion is used for transmission connection with the outer frame; The end of the impeller shaft passes through the mounting seat, and a connecting portion is provided at the end of the impeller shaft. The connecting portion is configured as a plurality of first protrusions, and the plurality of first protrusions are snap-fitted with a plurality of second protrusions at the bottom of the outer frame.

17. The pre-filter according to claim 1, characterized in that: The pre-filter further comprises a reversing structure, which comprises a reversing bottom shell and a movable part, the reversing bottom shell is connected to the mounting seat, and the movable part passes through the impeller assembly and the outer frame.

18. The pre-filter according to claim 17, characterized in that: The impeller body is hollow to form an avoidance hole, which penetrates the mounting seat for the movable part to pass through.

19. The pre-filter according to claim 1, characterized in that: The pre-filter also includes a water distributor for generating a swirl flow, and the outer frame is also provided with a water flow driving component, and the water flow driving component can drive the outer frame to rotate under the drive of the water flow.

20. The pre-filter according to claim 1, characterized in that: The outer frame is also provided with a scraping and cleaning device for cleaning the filter assembly of the pre-filter and / or the filter bottle of the pre-filter.

21. A water system, characterized in that: The method comprises a pre-filter as claimed in any one of claims 1 to 19.

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