Exterior frame, pre-filter and water system

Abstract

This invention discloses an outer frame, a pre-filter, and a water system, relating to the field of pre-filter technology. The outer frame includes a cylindrical frame and a bottom cover. The cylindrical frame includes a chassis and side frames disposed on the chassis. The siphon channel includes a sidewall channel and a bottom channel communicating with the sidewall channel. The sidewall channel is positioned corresponding to the side frames and has siphon holes communicating with the inner side of the cylindrical frame. The bottom cover and chassis together form the bottom channel. The chassis has a first discharge port communicating with the outside of the cylindrical frame, and the bottom channel communicates with the first discharge port. This invention improves the siphon tube structure and installation method of the outer frame, facilitating the fabrication of the siphon channel and making it easier to clean, avoiding blockages and ensuring optimal siphon performance.

Description

Technical Field

[0001] This invention relates to the field of pre-filter technology, and particularly to an exoskeleton, a pre-filter, and a water system. Background Technology

[0002] During the use of a pre-filter, it is necessary to periodically clean the impurities attached to the filter screen surface in situ and then discharge them through the drain valve. In order to improve the cleaning effect, the existing technology utilizes the siphon principle and sets a siphon channel in the outer frame. The siphon channel can generate strong suction and improve cleaning efficiency. However, the existing siphon channel has a complex structure and poor siphon rinsing effect. Summary of the Invention

[0003] The main objective of this invention is to propose an outer frame, a pre-filter using the outer frame, and a water system. The aim is to improve the siphon tube structure and installation method of the outer frame, making it easier to process and form a siphon channel, and easier to clean the siphon channel to avoid clogging and affecting the siphon effect.

[0004] To achieve the above objectives, the present invention proposes an outer frame having a siphon channel. The outer frame is configured to be rotatably fitted onto the filter assembly of the pre-filter. The outer frame includes a cylindrical frame and a bottom cover. The cylindrical frame includes a chassis and side frames disposed on the chassis. The siphon channel includes a side wall channel and a bottom channel communicating with the side wall channel. The side wall channel is disposed corresponding to the side frame and has a siphon hole communicating with the inner side of the cylindrical frame. The bottom cover and the chassis are combined to form the bottom channel. The chassis has a first discharge port communicating with the outside of the cylindrical frame, and the bottom channel communicates with the first discharge port.

[0005] In one embodiment, the bottom cover is detachably connected to the chassis.

[0006] In one embodiment, the chassis has a protruding flow channel groove with an upward-facing opening. The flow channel groove communicates with the side wall flow channel and extends to the center of the chassis. The bottom cover engages with the flow channel groove and seals the opening of the flow channel groove to form the bottom flow channel.

[0007] In one embodiment, the bottom cover covers the flow channel groove, the outer side wall of the flow channel groove is provided with a buckle, the bottom cover is provided with a buckle groove corresponding to the buckle, and the bottom cover is fixed to the chassis by the buckle and the buckle groove engaging.

[0008] In one embodiment, a buckle is provided on each of the opposite sides of the flow channel groove, and the chassis is provided with a clearance notch through the chassis corresponding to the buckle. After the bottom cover is closed with the chassis, the bottom cover covers the clearance notch.

[0009] In one embodiment, a plurality of siphon channels are provided at intervals along the circumference of the cylinder frame, and the number of first discharge ports is provided corresponding to the number of siphon channels, and each first discharge port is connected to a bottom channel.

[0010] In one embodiment, the bottom cover includes a plurality of covering portions, which together with the chassis form a bottom flow channel.

[0011] In one embodiment, the first discharge outlets are all inclined in the same direction from the upper surface of the chassis to the lower surface.

[0012] In one embodiment, the first discharge port is located at the end of the bottom flow channel.

[0013] In one embodiment, the outer frame further includes a plurality of siphon members corresponding to the number of siphon channels, the siphon holes are provided on the siphon members, one of the siphon members and the side frame surround to form a side wall channel, the siphon members are slidably connected to the side frame, and the siphon members are snapped and fixed on the side frame.

[0014] In one embodiment, the top edge of the side frame is provided with an installation notch, and the top of the siphon member is provided with an installation block facing the side frame. The installation block is embedded in the installation notch, and the top of the siphon member is flush with the top edge of the side frame.

[0015] In one embodiment, the chassis is further provided with a second discharge port, which connects the inner side of the tubular frame and the outer side of the tubular frame.

[0016] In one embodiment, multiple second discharge ports are provided, with one second discharge port located between two adjacent siphon channels and closer to the outer side of the chassis than the first discharge port.

[0017] In one embodiment, the outer frame is further provided with a scraping device for cleaning the filter assembly and / or the filter bottle of the pre-filter.

[0018] In one embodiment, a water flow driving component is arranged on the inner periphery of the outer frame, which can drive the outer frame to rotate under the drive of water flow.

[0019] The present invention also proposes a pre-filter, comprising a filter bottle, a filter assembly, and an outer frame as described above, wherein the outer frame is disposed between the filter bottle and the filter assembly.

[0020] In one embodiment, the pre-filter further includes a valve head and a water distributor disposed on the valve head and / or the filter bottle. The valve head has a water inlet, and the raw water entering the filter bottle from the water inlet generates a swirling flow through the water distributor.

[0021] In one embodiment, the bottom of the outer frame is provided with a water-blocking ring extending away from the bottom, and the first discharge port is located inside the water-blocking ring.

[0022] The present invention also proposes a water system comprising a pre-filter as described above.

[0023] The outer frame of this invention can be used in a pre-filter. On one hand, the outer frame serves as a support structure between the filter assembly and the filter bottle, effectively enhancing the stability of the entire pre-filter. On the other hand, its specific shape and layout guide water flow more smoothly through the filter assembly, improving filtration efficiency. Multiple siphon holes in the lateral flow channel can more effectively guide impurities and particulate matter intercepted by the filter assembly to the bottom flow channel, and finally discharge them through the drain port. By designing the bottom flow channel between the chassis and the bottom cover, compared to setting a through-flow bottom flow channel inside the chassis, the structure is simpler and easier to manufacture. Furthermore, it is easier to clean, reducing the possibility of dirt accumulating inside and clogging the filter screen, avoiding siphon failure. It is also easier to increase the size of the siphon flow channel compared to existing solutions, improving the cleaning effect. In addition, the rotation of the outer frame can promote water swirling, further enhancing the cleaning effect. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the pre-filter provided by the present invention;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure of the inner and outer frame and the impeller assembly;

[0027] Figure 3 This is an exploded structural diagram of the tube frame and bottom cover in one embodiment of the outer frame;

[0028] Figure 4 This is a structural schematic diagram of the cylindrical frame and siphon component in one embodiment of the external skeleton;

[0029] Figure 5 This is a schematic diagram of the bottom structure of one embodiment of the exoskeleton;

[0030] Figure 6 This is a schematic diagram of the bottom structure of another embodiment of the exoskeleton;

[0031] Figure 7 This is a schematic diagram of the structure of the disconnected view in the pre-filter.

[0032] Explanation of icon numbers:

[0033] 10. Filter bottle; 101. Filter chamber; 102. Drain outlet;

[0034] 20. Valve head; 201. Inlet; 202. Outlet;

[0035] 30. Filter components;

[0036] 40. Impeller assembly; 401. Impeller cavity; 440. Impeller body;

[0037] 50. Outer frame; 501. Siphon channel; 501a. Side wall channel; 501b. Bottom channel; 502. Water flow drive component; 503. First discharge port; 504. Second discharge port;

[0038] 510. Tube frame; 511. Chassis; 511a. Clearance notch; 512. Side frame; 514. Water baffle ring; 515. Flow channel; 516. Clip; 517. Slide rail; 518. Installation notch;

[0039] 520. Bottom cover; 521. Snap groove; 522. Cover fitting;

[0040] 530. Siphon component; 531. Siphon hole; 532. Slide rail; 533. Mounting block;

[0041] 60. Water distributor;

[0042] 90. Scraping device.

[0043] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0045] 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 positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0046] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0047] During the use of a pre-filter, it is necessary to periodically clean the impurities attached to the filter screen surface in situ and then discharge them through the drain valve. In order to improve the cleaning effect, the existing technology utilizes the siphon principle and sets a siphon channel in the outer frame. The siphon channel can generate strong suction and improve cleaning efficiency. However, the existing siphon channel has a complex structure, poor siphon rinsing effect, and cannot effectively adsorb impurities on the filter screen surface.

[0048] To address this, the present invention proposes an outer frame, a pre-filter using the outer frame, and a water system. By improving the siphon tube structure and installation method of the outer frame, it is easier to process and form a siphon channel, and easier to clean the siphon channel, avoiding blockage and affecting the siphon effect.

[0049] Water systems, such as whole-house water purification systems, typically include a pre-filter. This pre-filter filters out large particles from tap water, ensuring water safety, extending the lifespan of appliances, preventing pipe blockages, and improving residents' health. The pre-filter is the first stage of coarse filtration in a whole-house water purification system. It usually contains a stainless steel filter screen and is a physical filtration device primarily used to intercept large particles larger than 40 microns, protecting downstream water safety.

[0050] Please see Figure 1A pre-filter typically 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, a filter assembly 30, an outer frame 50, and an impeller assembly 40 connected to the filter bottle 10. The filter bottle 10 has a water filtration chamber 101, within which the filter assembly 30, the outer frame 50, and the impeller assembly 40 arranged below the outer frame 50 are disposed. The valve head 20 has an inlet 201 and an outlet 202 communicating with the water filtration chamber 101. The inlet 201 is connected to the water supply end, and the outlet 202 is connected to the water consumption end. It should be noted that the water supply end can be a tap water pipe, a water tower, or well water, and the water consumption end can be a faucet, a shower head, or a drinking water outlet; this application does not specifically limit these possibilities.

[0051] A water distributor 60 is installed inside the valve head 20. The water distributor 60 has a spiral flow channel. The raw water entering the valve head 20 from the inlet 201 forms a swirling flow after passing through the water distributor 60. The outer frame 50 is equipped with a water flow guide, which can rotate relative to the filter assembly 30 under the drive of the water flow. The outer frame 50 is equipped with a cleaning mechanism, which can clean the filter screen of the filter assembly 30. Impurities are adsorbed through the siphon flow channel 501 set in the outer frame 50. The rotation of the outer frame 50 generates a swirling flow. The water flow of the outer frame 50 enters the impeller assembly 40. The outer frame 50 and the impeller assembly 40 are connected by a transmission. In the first stage, the outer frame 50 drives the impeller of the impeller assembly 40 to rotate. In the second stage, the impeller will drive the outer frame 50 to rotate in turn, thereby causing the water in the filter bottle 10 to generate a swirling flow and be discharged from the drain port 102 of the filter bottle 10 more quickly.

[0052] The pre-filter is equipped with a filter element 30. The form and structure of the filter element 30 are not limited. The filter element 30 can be a stainless steel filter screen or a PP cotton filter screen. When water flows through it, these filter screens can intercept large particles of impurities in the water and remove some sediment, rust, sand, bacteria and other particulate impurities generated in the pipes. It provides good protection for water purifiers, washing machines, shower heads, high-end faucets, downstream pipes and other equipment, reducing the risk of damage to these devices due to blockage by impurities.

[0053] Reference Figure 1 and Figure 7 The pre-filter is usually a "T" shaped structure. The top horizontal part has the inlet and outlet 202 on the left and right sides, respectively. The bottom vertical part is the body and the internal cylindrical filter assembly 30. The bottom is the drain outlet 102, which is controlled by a valve to open and close.

[0054] The valve head 20 is typically made of copper alloy. The connection between the valve head 20 and the filter bottle 10 is primarily a threaded connection. For example, the valve head 20 has a protruding external threaded tube, and the bottle mouth of the filter bottle 10 has a corresponding internal thread for threading the external threaded tube. To reduce the manufacturing difficulty of the pre-filter, lower the testing requirements for its assembly results, and reduce the material cost of the valve head 20, in this embodiment, the filter bottle 10 and the valve head 20 are connected by splicing and then fastening with fasteners.

[0055] During the use of the pre-filter, it is necessary to clean the impurities attached to the filter screen surface periodically and then discharge them through the drain valve. The efficient operation of the scraping device 90 is crucial. In the existing technology, there are scraping devices 90 driven by motors, scraping devices 90 driven by impellers, etc.; there are also scraping devices that achieve self-rotation by using the impact force of the water flow itself.

[0056] In this invention, the siphon flow of the outer frame 50 has been improved. The outer frame 50 can be arranged alone in the filter chamber 101 or used in conjunction with the impeller assembly 40. The structural improvement of the siphon flow channel 501 of the outer frame 50 will be described below.

[0057] Specifically, the present invention improves the siphon tube structure and installation method of the outer frame 50, making it easier to process and form the siphon channel 501, and making it easier to clean the siphon channel 501, avoiding blockage and affecting the siphon effect.

[0058] Please combine Figure 1 and Figure 7 and refer to Figures 2 to 6 In one embodiment of the present invention, the outer frame 50 includes a cylindrical frame 510 and a bottom cover 520. The cylindrical frame 510 includes a chassis 511 and a side frame 512 disposed on the chassis 511. The siphon channel 501 includes a side wall channel 501a and a bottom channel 501b communicating with 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 communicating with the inner side of the cylindrical frame 510. The chassis 511 is provided with a first discharge port 503 communicating with the outside of the cylindrical frame 510. The bottom channel 501b communicates with the first discharge port 503. The bottom cover 520 is closed with the chassis 511 to form the bottom channel 501b or the bottom channel 501b is disposed on the bottom cover 520.

[0059] The outer frame 50 of the technical solution of the present invention can be used in a pre-filter. On the one hand, the outer frame 50 serves as a support structure between the filter assembly 30 and the filter bottle 10, effectively enhancing the stability of the entire pre-filter; on the other hand, its specific shape and layout guide water flow more smoothly through the filter assembly 30, improving filtration efficiency. Through the multiple siphon holes 531 in the lateral flow channel, impurities and particles intercepted by the filter assembly 30 can be more effectively guided to the bottom flow channel 501b and finally discharged through the drain port 102. By designing the bottom flow channel 501b between the chassis 511 and the bottom cover 520, compared to setting a through bottom flow channel 501b inside the chassis 511, the structure is simpler and easier to manufacture; on the other hand, it is easier to clean, reducing the possibility of dirt accumulating inside and clogging the filter screen, 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.

[0060] The siphon channel 501 is L-shaped, the side wall channel 501a is the vertical part of the L-shape, and the bottom channel 501b is the horizontal part of the L-shape. The side wall channel 501a is set in the side frame 512, which means that the side wall channel 501a is set in the side frame 512, and does not limit the formation method of the side wall channel 501a.

[0061] Reference Figure 3 The outer frame 50 forms the bottom flow channel 501b of the siphon flow channel 501 through the bottom cover 520 and the chassis 511. In one embodiment, the outer frame 50 is fitted with a filter assembly 30. The outer frame 50 or the filter assembly 30 is equipped with an electrically driven / manually driven cleaning mechanism. The cleaning mechanism cleans impurities attached to the surface of the filter screen and then discharges them through the drain valve. Through the multiple siphon holes 531 of the lateral flow channel, impurities, particles, etc. intercepted by the filter assembly 30 can be more effectively guided to the bottom flow channel 501b and finally discharged through the drain port 102. (Refer to...) Figure 1 and Figure 2 In one embodiment, the outer frame 50 can rotate relative to the filter assembly 30. For example, the outer frame 50 is equipped with an electrically driven or manually driven rotating structure, which drives the outer frame 50 to rotate; or, the outer frame 50 is driven to rotate relative to the filter assembly 30 by the raw water entering the filter bottle 10, so that the water in the filter bottle 10 generates a swirling flow and is discharged from the drain port 102 of the filter bottle 10 more quickly; in a further embodiment, the outer frame 50 can also be equipped with a scraping device 90. As the outer frame 50 rotates with the water flow, it also cleans the impurities of the filter screen through the scraping device 90, and sucks the impurities into the siphon channel 501 through the siphon hole 531, and discharges them into the drain port 102 through the first discharge port 503.

[0062] The base 511 and side frame 512 can be integrally formed, or the side frame 512 can be fixed to the base 511 by screws or other means. The base 511 of the cylindrical frame 510 is circular, and the side frame 512 surrounds the base 511 and is designed around the outer edge of the filter assembly 30. The side frame 512 is usually presented as a ring or part of a cylinder, but is not completely closed to allow water flow. The shape of the side frame 512 matches the shape of the filter assembly 30 to ensure that it can fit tightly and support the filter assembly 30, while maintaining effective circulation of water around the filter assembly 30.

[0063] Reference Figure 3 In one embodiment, the bottom cover 520 and the chassis 511 are closed to form a bottom flow channel 501b. In another embodiment, the bottom flow channel 501b is located on the bottom cover 520. For ease of disassembly, the bottom cover 520 and the chassis 511 are detachably connected, for example, by screw fastening or snap-fitting. The detachable bottom cover 520 design makes cleaning and maintenance simple and convenient, allowing users to perform these tasks themselves without needing professional service, thereby reducing maintenance costs.

[0064] To facilitate the installation of the bottom cover 520 and the chassis 511, the chassis 511 is provided with a protruding flow channel 515. The flow channel 515 is open upwards, and its opening communicates with the side wall flow channel 501a. The bottom of the flow channel 515, opposite to its opening, extends to the center of the chassis 511. The bottom cover 520 engages with the flow channel 515 and seals it, forming the bottom flow channel 501b. The design of the flow channel 515 enhances the connection stability between the chassis 511 and the bottom cover 520, making the entire outer frame 50 structure more stable and less prone to loosening or deformation. The upward-opening design of the flow channel 515 makes the installation of the bottom cover 520 more convenient. Users can easily engage the bottom cover 520 with the flow channel 515 without complicated operations to complete the formation of the bottom flow channel 501b.

[0065] Reference Figure 3 To ensure stability, the bottom cover 520 is fitted with a flow channel 515. A snap fastener 516 is provided on the outer wall of the flow channel 515, and the bottom cover 520 has a corresponding snap groove 521. The bottom cover 520 is fixed to the base 511 by the snap fastener 516 and the snap groove 521 engaging. This stability is further enhanced by the design of the snap fastener 516 and the snap groove 521. The tight fit between the snap fastener 516 and the snap groove 521 prevents the bottom cover 520 from loosening or falling off during use due to water flow impact or external force. The design of the snap fastener 516 and the snap groove 521 places higher demands on installation precision, which helps ensure that the bottom cover 520 is accurately aligned and fixed with the flow channel 515 during installation, avoiding sealing problems or structural instability caused by improper installation. The design of the snap fastener 516 and the snap groove 521 makes the disassembly and installation of the bottom cover 520 simpler and faster.

[0066] Reference Figure 3 For ease of manufacturing, snap fasteners 516 are located on opposite sides of the runner groove 515. The chassis 511 has a clearance notch 511a corresponding to the snap fasteners 516, which passes through the chassis 511. After the bottom cover 520 is closed with the chassis 511, the bottom cover 520 blocks the clearance notch 511a. By setting snap fasteners 516 on opposite sides of the runner groove 515 and correspondingly opening clearance notches 511a on the chassis 511, the mold design and manufacturing process are simplified. The clearance notch 511a makes it easier to form the snap fastener 516 structure in manufacturing processes such as injection molding or stamping, reducing manufacturing costs and difficulty. Although the opening of the clearance notch 511a may seem to weaken the local strength of the chassis 511, through reasonable design and the blocking by the bottom cover 520, it does not actually have a significant impact on the overall structural strength. At the same time, the snap fasteners 516, located on opposite sides of the runner groove 515, can more effectively disperse and resist external forces, maintaining structural stability. The clearance notch 511a is completely concealed after the bottom cover 520 is closed with the chassis 511, thus not affecting the aesthetic appearance of the pre-filter. This helps improve the overall product image and the user's visual experience. The snap-on design 516 retains the characteristics of easy disassembly and easy installation, making maintenance of the bottom cover 520 simple and quick. Users can easily disassemble and install the bottom cover 520 when performing operations such as cleaning or replacing the filter assembly 30.

[0067] Specifically, multiple first discharge ports 503 are spaced apart along the circumference of the cylindrical frame 510. The number of first discharge ports 503 corresponds to the number of siphon channels 501, and each first discharge port 503 is connected to a bottom channel 501b. To ensure drainage effect, 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 cylindrical frame 510, the bottom cover 520 includes multiple cover parts 522. Each cover part 522 and the base 511 enclose a bottom channel 501b. By designing multiple cover parts 522 to connect with the cylindrical frame 510, and each cover part 522 and the base 511 enclosing a bottom channel 501b, the connection between the bottom cover 520 and the cylindrical frame 510 becomes more convenient and accurate.

[0068] Specifically, there are three siphon channels 501, with three caps 522 resembling "fan blades." Each siphon channel 501 has an independent first discharge port 503. To ensure smooth drainage, the first discharge ports 503 are all inclined in the same direction from the upper surface of the chassis 511 downwards. The inclined first discharge ports 503 guide the water flow out more smoothly, reducing water stagnation and eddies in the bottom channel 501b. This helps prevent impurities from accumulating in the bottom channel 501b, keeping the pre-filter clean and operating efficiently. The first discharge ports 503 are inclined clockwise or counterclockwise along the axial direction. The inclined first discharge ports 503 also have a certain anti-backflow function and can also create a swirling flow in the drainage. The efficient design of the bottom channel 501b and the first discharge ports 503 allows the pre-filter to discharge impurities and wastewater more quickly, improving the filtration effect and the overall performance of the system. To avoid water interference, the first discharge ports 503 are all located at the end of the bottom channel 501b.

[0069] The side frame 512 extends axially, and the filter assembly 30 is arranged within the side frame 512. Side wall channels 501a, constituting the siphon channel 501, are formed on the side frame 512. Multiple side wall channels 501a are provided, such as two, three, or even more. Siphon holes 531 are provided on the side walls; these holes are part of the side wall channels 501a and are used to guide water flow from outside the filter assembly 30 through the side wall channels 501a into the bottom channel 501b. The size, number, and distribution of the siphon holes 531 are carefully designed to ensure uniform water flow distribution and effective filtration.

[0070] The sidewall flow channel 501a can be formed by the side frame 512 itself; or it can be a part with a separate sidewall flow channel 501a. In this embodiment, the siphon member 530 constituting the sidewall flow channel 501a and the side frame 512 together form the sidewall flow channel 501a. The number of siphon members 530 corresponds to the number of siphon flow channels 501, and the siphon holes 531 are provided on the siphon members 530.

[0071] Reference Figure 4 The siphon component 530 can be fixed to the side frame 512 in various ways, such as by locking it onto the side frame 512; however, this is not convenient during installation or maintenance. In this embodiment, for ease and secure installation, the siphon component 530 is slidably connected to the side frame 512, and the siphon component 530 is snap-fitted onto the side frame 512. By introducing the design of the slide rail 517 and slide rail 532, the siphon component 530 can be more easily inserted and fixed onto the side frame 512, and is also easy to disassemble, improving the convenience of operation.

[0072] Specifically, the inner surface of the side frame 512 is provided with a slide rail 517, which extends to both ends of the side frame 512. The siphon component 530 has slide rails 532 on both sides, and the siphon component 530 is inserted into the slide rails 517 via the slide rails 532. The matching design of the slide rails 532 and slide rails 517 ensures a more stable position of the siphon component 530 on the side frame 512, reducing the risk of loosening or displacement due to vibration or water flow impact, thereby improving the overall stability and reliability of the pre-filter. This robust connection method reduces the risk of failure due to component loosening or displacement, improving the overall performance and reliability of the pre-filter.

[0073] To improve aesthetic consistency and enhance connection stability, the connection method between the side frame 512 and the siphon component 530 is further defined. Specifically, the top edge of the side frame 512 has a mounting notch 518, and the top of the siphon component 530 facing the side frame 512 has a mounting block 533. The mounting block 533 is fitted into the mounting notch 518, and the top of the siphon component 530 is flush with the top edge of the side frame 512. Through the combined design of the mounting notch 518 and the mounting block 533, the connection between the siphon component 530 and the side frame 512 is more secure. After the mounting block 533 is fitted into the mounting notch 518, it effectively prevents the siphon component 530 from moving horizontally, further improving connection stability. The flush alignment of the top edge of the siphon component 530 with the top edge of the side frame 512 not only enhances the overall aesthetics of the pre-filter but also avoids the abruptness caused by uneven component heights, improving the overall quality of the product. The design of the mounting block 533 and the mounting notch 518 makes the installation process of the siphon component 530 more intuitive and simple. Users only need to align the mounting block 533 with the mounting notch 518 and insert it, without any additional fixing steps, thus simplifying the installation process.

[0074] Reference Figure 3 and Figure 4 Based on the mounting notch 518 and mounting clip 533, in order to achieve the snap-fit ​​fixation between the siphon component 530 and the side frame 512, a snap-fit ​​structure can be added to achieve the snap-fit ​​fixation between the siphon component 530 and the side frame 512, significantly improving the stability and reliability of the fixation. Compared with traditional fixing methods, which may require additional fasteners (such as screws, nuts, etc.) and are cumbersome and time-consuming in the installation process, the snap-fit ​​fixation method simplifies the installation steps, improves installation efficiency, and reduces installation difficulty and cost.

[0075] Reference Figure 5To enhance drainage efficiency, the chassis 511 is also equipped with a second discharge port 504, which connects the inside of the cylinder frame 510 to the outside of the cylinder frame 510. The addition of the second discharge port 504 provides an additional drainage channel for water accumulation inside the cylinder frame 510, helping to accelerate water flow and improve drainage efficiency. During filter operation, especially under high flow or high pressure conditions, this design significantly reduces the risk of water accumulation inside the cylinder frame 510, ensuring smooth filter operation. By promptly draining water from the inside of the cylinder frame 510, the residence time of water between the filter assembly 30 and the cylinder frame 510 can be reduced, which helps improve the overall filtration effect of the pre-filter.

[0076] Based on the water accumulation and drainage requirements inside the siphon frame 510, multiple second discharge ports 504 can be installed on the chassis 511. These second discharge ports 504 can be evenly distributed or strategically arranged according to the water accumulation area to maximize drainage efficiency. Specifically, multiple second discharge ports 504 are provided, located between two adjacent siphon channels 501 and closer to the outer side of the chassis 511 relative to the first discharge port 503. The second discharge ports 504 are arranged symmetrically with the first discharge port 503 to maintain the balance and aesthetics of the overall structure. This arrangement also helps to distribute drainage pressure and improve drainage efficiency.

[0077] Specifically, in this embodiment, the outer frame 50 is designed with three siphon channels 501, each evenly distributed at 120°. The wall of the siphon component 530 is designed with seven siphon holes 531, each elliptical in shape. The number and layout of the siphon holes 531 are related to the number and structure of the filter assembly 30 modules and can be flexibly arranged. Water flows from inside the siphon channels 501 to the bottom channel 501b and exits from the first discharge port 503. The three siphon channels 501 at the bottom of the outer frame 50 have angled first discharge ports 503 located near their centers. The angled first discharge port 503 allows water to flow at an angle into the bottom impeller assembly 40, improving the impeller's rotational efficiency. In a design without the impeller assembly 40, the siphon channel 501 connects directly to the drain port 102 via the impeller. Opening the drain valve utilizes the negative pressure generated by the siphon effect to adsorb impurities on the filter screen surface, reducing impurity adhesion and improving filtration efficiency. By designing the bottom channel 501b between the chassis 511 and the bottom cover 520, compared to setting a through bottom channel 501b inside the chassis 511, the design is simpler and easier to manufacture. Furthermore, it facilitates cleaning, reduces the possibility of dirt accumulating inside and clogging the filter screen, and prevents siphon failure. It also makes it easier to increase the size of the siphon channel 501 compared to existing designs, improving cleaning effectiveness.

[0078] In this embodiment, the outer frame 50 rotates relative to the filter assembly 30. The outer frame 50 can be rotated electrically or manually to generate a swirling flow in the filter chamber 101. Alternatively, a water distributor 60 that changes the direction of water flow can be provided at the top of the pre-filter. The outer frame 50 is equipped with a water flow drive 502, allowing the outer frame 50 to rotate with the help of water flow. Furthermore, a structure such as bristles can be provided on the outer frame 50 to clean the filter screen of the filter assembly 30, achieving cleaning and improving the sewage discharge effect. Furthermore, an impeller assembly 40 is provided at the bottom of the pre-filter to drive the water flow in the filter chamber 101 to rotate, improving the discharge of sewage during the flushing process.

[0079] Reference Figure 7 Furthermore, to ensure that water from the siphon channel 501 of the outer frame 50 can flush the impeller assembly 40, in this embodiment, a water-retaining ring 514 facing the impeller assembly 40 is provided at the bottom of the outer frame 50. This water-retaining ring 514 is fitted onto the impeller assembly 40, and the water-retaining ring 514 and the impeller assembly 40 cooperate to form an interlocking structure. Under the action of this interlocking structure, the water flow path in the pre-filter is optimized. Under normal circumstances, water in the filter bottle 10 is blocked outside the interlocking structure, while water in the siphon channel 501 can smoothly enter the impeller assembly 40 through the interlocking structure and flow through the impeller assembly 40 for wastewater discharge. This design ensures the normal filtration function of the pre-filter while improving wastewater discharge efficiency and stability.

[0080] Reference Figure 1 and Figure 7 The bottom of the outer frame 50 and the top of the impeller assembly 40 form an "I" shape in the axial section. The vertical part of the "I" is a water-blocking ring 514, which extends to the end face of the impeller assembly 40 so that the first discharge port 503 is connected to the inlet of the impeller assembly 40. The impeller assembly 40 is provided with an impeller body 440, which can rotate under the drive of water flow. This helps to enhance the flushing force of the water flow and makes it easier for impurities in the filter chamber 101 to be carried into the impeller assembly 40 for sewage treatment.

[0081] Reference Figure 7 When the drain valve is opened, water flows in through the two inlets of the impeller assembly 40, and the impeller body 440 rotates under the impact of the water flow. To improve drainage efficiency, the impeller assembly 40 is sealed to the filter bottle 10.

[0082] When the drain valve is opened, the impact of the water flow causes the impeller body 440 to rotate, further propelling the water flow and generating centrifugal force. This centrifugal force helps to push impurities and residues in the water towards the edge of the impeller cavity 401 and cause them to accumulate. Finally, the wastewater containing impurities is discharged from the filter bottle 10 through the impeller assembly 40, thus achieving the water purification and wastewater discharge process.

[0083] Common methods for flushing pre-filters include the following: direct flushing mode and backflushing mode. In direct flushing mode, water flows along the direction of tap water to flush the dirt-collecting surface of the filter element 30, washing away particulate impurities on the filter screen with the water flow. Backflushing mode involves reverse water flow flushing, where tap water pressure penetrates from the inner wall of the filter screen to the outer wall, forming a high-velocity water column that washes away particulate impurities on the filter screen from the inside out.

[0084] The impeller assembly 40 can be used in both direct flush and backflushing modes. It can also be used in siphon mode, with the outer frame 50 featuring a siphon channel 501. The suction generated by the siphon principle helps remove impurities accumulated on the filter screen. The structure of the outer frame 50 and its connection to the impeller assembly 40 are described above and will not be repeated here.

[0085] The sealed connection between the impeller assembly 40 and the filter bottle 10 ensures the system's airtightness, preventing inconvenience during use such as water leakage. In this embodiment, the sealing element is configured as a sealing ring, with its outer periphery abutting against the filter bottle 10. In other embodiments, the sealing element can also be a gasket, sealing tape, water seal, sealant, soft filler, etc.

[0086] A water flow drive component 502 is arranged on the inner circumference of the outer frame 50. During normal filtration, water entering from the valve head 20 forms a swirling flow through the water distributor 60 at the top of the filter assembly 30, which washes over the water flow drive component 502 and drives the outer frame 50 to rotate. At this time, the rotation of the outer frame 50 is not driven by the bottom impeller, and the bottom impeller body 440 is not water-driven during normal filtration. In the sewage discharge state, the bottom impeller body 440 rotates due to water flow, driving the outer frame 50 to rotate as well. Therefore, the outer frame 50 can rotate in both filtration and sewage discharge states.

[0087] The outer frame 50 is equipped with a water flow drive 502, which allows the outer frame 50 to rotate with the help of water flow; and a scraping device 90 can be further provided on the outer frame 50 to clean the filter screen of the filter assembly 30, thereby achieving cleaning and improving the sewage discharge effect. The scraping device 90 can be a brush or a rubber strip. The scraping device 90 can be set to clean the inner wall of the filter bottle alone; or clean the filter assembly alone; or clean both at the same time.

[0088] In summary, the impeller assembly 40 can be combined independently with the scraping device 90. The rotation of the impeller drives the scraping device 90 to clean the filter screen surface, effectively removing impurities attached to the filter screen and reducing the frequency and difficulty of manual cleaning. The scraping device 90 can also be arranged on the outer frame 50, which can rotate relative to the filter assembly 30 to drive the scraping device 90 to clean. To improve the sewage discharge effect, the outer frame 50 can also be equipped with a siphon channel 501.

[0089] The present invention also proposes a water system comprising the aforementioned pre-filter, the specific structure of which is described below. Figures 1 to 7 Since this water system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0090] The water system includes at least the components from the pre-filter to the water outlet. For example, the water system may include household appliances such as water heaters, dishwashers, and water dispensers, as well as auxiliary components such as water pipes for domestic water use throughout the house.

[0091] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An exoskeleton for a pre-filter, characterized in that, The outer frame is provided with a siphon flow channel, and the outer frame is configured to be rotatably fitted onto the filter assembly of the pre-filter. The outer frame includes: A cylindrical frame, comprising a chassis and side frames disposed on the chassis, wherein the siphon channel comprises a sidewall channel and a bottom channel communicating with the sidewall channel, the sidewall channel being disposed corresponding to the side frames, and the sidewall channel having a siphon hole communicating with the inner side of the cylindrical frame; and The bottom cover, together with the chassis cover, forms the bottom flow channel. The chassis is provided with a first discharge port communicating with the outside of the cylinder frame. The bottom flow channel is communicating with the first discharge port. The chassis is also provided with a second discharge port communicating with the inside of the cylinder frame and the outside of the cylinder frame. The bottom of the outer frame is provided with a water-blocking ring extending away from the bottom. The first discharge port is located inside the water-blocking ring, and the second discharge port is located outside the water-blocking ring. The water-blocking ring is fitted with an impeller assembly. The bottom of the outer frame and the top of the impeller assembly form an "I" shape in axial cross-section. The vertical part of the "I" is the water-blocking ring, and the water-blocking ring extends to the end face of the impeller assembly.

2. The exoskeleton as described in claim 1, characterized in that, The bottom cover is detachably connected to the chassis.

3. The exoskeleton as described in claim 2, characterized in that, The chassis has a protruding flow channel groove with an upward-facing opening. The flow channel groove is connected to the side wall flow channel and extends to the center of the chassis. The bottom cover engages with the flow channel groove and seals the opening of the flow channel groove to form the bottom flow channel.

4. The exoskeleton as described in claim 3, characterized in that, The bottom cover covers the flow channel groove, and the outer wall of the flow channel groove is provided with a buckle. The bottom cover is provided with a buckle groove corresponding to the buckle. The bottom cover is fixed to the chassis by the buckle and the buckle groove engaging.

5. The exoskeleton as described in claim 3, characterized in that, Each side of the flow channel is provided with a buckle, and the chassis is provided with a clearance notch that passes through the chassis corresponding to the buckle. After the bottom cover is closed with the chassis, the bottom cover covers the clearance notch.

6. The exoskeleton as described in claim 1, characterized in that, The siphon channels are provided at multiple intervals along the circumference of the cylinder frame, and the first discharge port is set according to the number of siphon channels, and each first discharge port is connected to a bottom channel.

7. The exoskeleton as described in claim 6, characterized in that, The bottom cover includes multiple covering portions, and one of the covering portions and the chassis encloses to form a bottom flow channel.

8. The exoskeleton as described in claim 6, characterized in that, The first discharge port is inclined in the same direction from the upper surface of the chassis to the lower surface.

9. The exoskeleton as described in claim 6, characterized in that, The first discharge port is located at the end of the bottom flow channel.

10. The exoskeleton as described in claim 6, characterized in that, The outer frame also includes a plurality of siphon components corresponding to the number of siphon channels. The siphon holes are provided on the siphon components. One of the siphon components and the side frame encloses to form a side wall channel. The siphon component is slidably connected to the side frame and is snapped and fixed on the side frame.

11. The exoskeleton as described in claim 10, characterized in that, The top edge of the side frame is provided with an installation notch, and the top of the siphon component is provided with an installation block facing the side frame. The installation block is embedded in the installation notch, and the top of the siphon component is flush with the top edge of the side frame.

12. The exoskeleton as described in claim 1, characterized in that, The second discharge port is provided in multiple ways, and one second discharge port is located between two adjacent siphon channels, and the second discharge port is located on the outer side of the chassis relative to the first discharge port.

13. The exoskeleton as described in claim 1, characterized in that, The outer frame is also provided with a scraping device for cleaning the filter components and / or filter bottles of the pre-filter.

14. The exoskeleton as described in claim 1, characterized in that, A water flow driving component is arranged on the inner periphery of the outer frame, which can drive the outer frame to rotate under the drive of water flow.

15. A pre-filter, characterized in that, It includes a filter bottle, a filter assembly, and an outer frame as described in any one of claims 1 to 14, the outer frame being disposed between the filter bottle and the filter assembly.

16. A water supply system, characterized in that, Includes the pre-filter as described in claim 15.

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