Double-bottle pre-filter

Abstract

The utility model discloses a double-bottle pre-filter, which is applied to the technical field of pre-filters and comprises a valve head with a water inlet, a water outlet, a lower end interface and an upper end interface, a first filtering system connected with the lower end interface and a second filtering system connected with the upper end interface, the first filtering system comprises a lower filtering bottle, a switching piece and a water segregator which are connected to a lower end interface, a separating assembly connected with the water segregator, and a separating screw rod which is arranged in the separating assembly and is provided with an upper part capable of sealing a water segregation blade of the water segregator, the side wall of the separating assembly is provided with an inclined hole, and the bottom of the separating assembly is provided with a deposition hole; the bottom cover is connected with the separation screw rod and seals water flow in a cavity on the outer side of the separation assembly; the sealing piece is arranged between the lower filter bottle and the bottom cover; the ball valve is connected with the sealing piece; the resetting piece is used for driving the separation screw rod and the switching piece to reset during filtering; the two filtering systems of the double-bottle pre-filter cooperate with each other, so that the filtering effect is good, the flux is increased, and the pollution discharge is clean and thorough.

Description

Technical Field

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

[0002] With the continuous improvement of living standards and the rapid development of technology, many household water-use devices have emerged. People have higher and higher requirements for water quality and are installing pre-filters in household pipe systems such as water wells or under-sink systems to ensure the water quality needs of downstream smart water-use devices.

[0003] Traditional pre-filters simply use a filter screen as the medium for filtration. This method has poor sewage discharge effect, is prone to clogging, and is difficult to adapt to different water qualities, affecting the lifespan of the filter screen and the user experience.

[0004] Existing pre-filters include dual-filtration system pre-filters, which design two filter screens in a filter bottle and install them on the inner and outer sides of the frame. When discharging sewage, the surface of the outer filter screen is rinsed to achieve the function of cleaning and discharging sewage.

[0005] However, existing dual-filtration systems with pre-filters have limited gaps between the filter screens. Over time, impurities accumulate between the two screens and are difficult to drain completely, leading to blockages. This results in reduced flow rate and lower water output at the downstream end, affecting household water use and ultimately reducing the overall lifespan of the system.

[0006] In summary, how to effectively solve the problem of excessive accumulation of impurities between the two screens of the pre-filter in existing dual-filtration systems, which is difficult to completely remove, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] The purpose of this utility model is to provide a dual-bottle pre-filter, in which the two filtration systems work together to achieve better filtration effect, increased flow rate, and thorough and clean sewage discharge.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0009] A dual-bottle pre-filter includes a valve head having an inlet, an outlet, a lower interface, and an upper interface; a first filtration system connected to the lower interface; and a second filtration system connected to the upper interface. The first filtration system includes a lower filter bottle, a switching element and a water distributor connected to the lower interface, a separation component connected to the water distributor, and a separation screw disposed within the separation component and capable of sealing the water distribution blades of the water distributor at its upper part. The side wall of the separation component has oblique holes, and the bottom of the separation component has sedimentation holes. The filter also includes a bottom cover connected to the separation screw and capable of sealing the water flow in the outer cavity of the separation component, a sealing element disposed between the lower filter bottle and the bottom cover, a ball valve connected to the sealing element, and a reset element that drives the separation screw and the switching element to reset during filtration. The bottom cover has a drain hole.

[0010] Preferably, the separation assembly includes a separation cylinder that is snapped into the inner wall of the water distributor and a separation chamber connected to the lower end of the separation cylinder. The inclined hole is provided on the side wall of the separation cylinder. The separation cylinder is a cylindrical cylinder. The angle between the inclined hole and the cylindrical cylinder is 30°-60°. The separation chamber is a funnel-shaped chamber with an upper cross-section smaller than the lower cross-section.

[0011] Preferably, the bottom of the separation chamber is provided with an inner convex cavity, the inner convex cavity is provided with a through hole in the axial direction, the lower end of the separation screw passes through the upper through hole and is placed in the inner convex cavity, and the connecting part of the bottom cover passes through the lower through hole and extends into the inner convex cavity to connect with the lower end of the separation screw.

[0012] Preferably, the inner convex cavity is frustum-shaped, the inclination direction of the sidewall of the inner convex cavity is opposite to the inclination direction of the inner wall of the separation chamber, and the deposition hole is located on the bottom surface of the separation chamber and in the annular area between the inner convex cavity and the separation chamber.

[0013] Preferably, the bottom cover includes a disc and the connecting part, the connecting part is located in the middle of the disc and is higher than the disc, and the drain hole is provided on the disc and located on the outer periphery of the connecting part.

[0014] Preferably, a rubber plug corresponding to the position of the deposition hole is connected to the disk.

[0015] Preferably, the bottom of the separation chamber is provided with an annular boss, the separation screw is provided with an annular rib, one end of the reset member abuts against the annular boss, and the other end abuts against the annular rib.

[0016] Preferably, the annular boss is disposed on the top surface of the inner convex cavity, and the bottom surface of the inner convex cavity is hollowed out.

[0017] Preferably, the separating screw includes a screw head and a screw rod. The upper end of the screw head is provided with a third annular groove that connects to the switching component. The side wall of the screw head is provided with a sealing ring for sealing the water-distributing blades. The water passage hole of the separating screw rod is provided on the bottom surface of the screw head. The screw rod is provided with a spiral ring.

[0018] Preferably, the separating screw has an axially penetrating flow channel at its center, and the bottom surface of the separating screw has an isolation mesh.

[0019] The beneficial effects of this utility model are as follows: the first filtration system is connected to the lower interface of the valve head, and the lower internal thread is screwed into the lower filter bottle. The switching component is connected to the lower interface, the upper end of the separating screw is connected to the lower end of the switching component, and the water passage hole of the separating screw is connected to the water passage hole of the switching component. The water distributor is located below the switching component. The first stream of water in the valve head flows into the water distributor and undergoes the first impurity separation through the annular spiral turbulence of the water distribution blades. The separated impurities are deposited on the outside of the separation component.

[0020] The separation component is connected to the water distributor, and the separation component and the water distributor are fixed relative to each other. The side wall of the separation component is provided with inclined holes, through which raw water enters the interior of the separation component. The inclined holes guide the water flow at a specific angle, increasing the contact area between the water flow and the separation screw, thereby improving the separation efficiency.

[0021] The separation assembly contains a separating screw. When water flows through the screw, it is forced to flow along a spiral path. This spiral motion subjects impurities in the water to centrifugal force, pushing them against the sidewalls of the separation assembly and ultimately depositing them at the bottom. The deposits are then discharged through sedimentation holes or periodically cleaned. The purified water, after spiral separation, is pushed upwards, flows out through the water passages of the separating screw, connects with the water inlet of the switching element, and finally flows out from the outlet, providing a clean water source. This separation process effectively removes impurities from the water.

[0022] The bottom cover is connected to the separating screw, and moves up and down with it. When the bottom cover moves upward, it seals the water flow in the outer cavity of the separating assembly, preventing water from entering. When the ball valve drain channel is opened, impurities under negative pressure in the lower filter bottle flow out with the water through the drain hole. The high pressure causes the bottom cover to move downward, which in turn moves the separating screw and the switching element downward. In the filtration state, the bottom cover abuts against the sedimentation hole at the bottom of the separating assembly to prevent impurities from entering. In the flushing state, the bottom cover disengages from the separating assembly, facilitating impurity discharge. During filtration, the reset element drives the separating screw and the switching element to reset.

[0023] The second filtration system is connected to the upper interface. The second filtration system includes an upper filter bottle, a component connected to the upper interface, a component connected to and located inside the upper filter bottle, and a component located on the outer periphery.

[0024] This utility model provides a dual-bottle pre-filter. During filtration, raw water enters from the left end and undergoes initial filtration via a distributor. Then, it passes through the separation mechanism and screw in the lower filter bottle for the first stage of filtration. The filtered water then flows back into the lower filter bottle, where it undergoes a second stage of filtration via the filter assembly. Finally, the purified water flows from the middle of the filter element to the outlet on the right end. This breaks away from conventional pure screen filtration, as the two filtration systems work together, combining the screen with the separation assembly and screw for superior filtration, increased flow rate, thorough and clean wastewater discharge, and extended service life for different water qualities. During flushing, the bottom drain ball valve opens, creating negative pressure in the filter bottle. The bottom cover moves the separation screw and switching component downwards, initiating a reverse flushing mode. The separated impurities are discharged through the drain channel, and all water ultimately exits through the drain hole at the bottom of the filter bottle. By enhancing the spiral separation mechanism, impurities in the water can be separated more effectively, providing more efficient water pretreatment. This removes most large particles, protects subsequent water purification equipment, extends its service life, and ensures water safety and hygiene. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the structure of a dual-bottle pre-filter provided in a specific embodiment of this utility model;

[0027] Figure 2 for Figure 1 Schematic diagram of the structure of the middle valve head;

[0028] Figure 3 for Figure 1 Schematic diagram of the switching component;

[0029] Figure 4 for Figure 1 Schematic diagram of the central water distributor;

[0030] Figure 5 for Figure 1 Schematic diagram of the middle separation cylinder;

[0031] Figure 6 for Figure 1 Schematic diagram of the middle separation chamber;

[0032] Figure 7 for Figure 1 Schematic diagram of the separation screw;

[0033] Figure 8 This is an isometric view of the separating screw;

[0034] Figure 9 This is a schematic diagram of the separation of the separating screw;

[0035] Figure 10 for Figure 1 Schematic diagram of the midsole cover;

[0036] Figure 11 for Figure 1 Schematic diagram of the middle scraping assembly;

[0037] Figure 12 This is a schematic diagram showing the filtration status of the dual-bottle pre-filter.

[0038] Figure 13 This is a schematic diagram of the backwashing state of the dual-bottle pre-filter.

[0039] Figure label:

[0040] 1-Valve head, 2-Inset piece, 3-Switching piece, 4-Water distributor, 5-Separation cylinder, 6-Separation chamber, 7-Separation screw, 8-Seal, 9-Ball valve, 10-Fixing piece, 11-Isolation net, 12-Bottom cover, 13-Reset piece, 14-Adapter, 15-Filter assembly, 16-Scraping assembly, 17-Three-proof column, 18-Upper filter bottle, 101-Inlet, 102-Outlet, 103-Lower internal thread, 104-Upper internal thread, 301-First annular groove, 302-Second annular groove, 303-First snap-fit, 304 - Water passage hole, 401-Water distribution blade, 402-Second snap fastener, 403-Convex platform, 501-Groove, 502-Inclined hole, 503-Lower annular groove, 504-Annular snap fastener, 601-Upper snap fastener, 602-Annular boss, 603-Sedimentation hole, 701-Third annular groove, 702-Sealing ring, 703-Fourth annular groove, 704-Spiral ring, 705-Annular rib, 706-External thread, 707-Water passage hole, 708-Flow channel, 1201-Drain hole, 1202-Rubber plug, 1203-Upper internal thread. Detailed Implementation

[0041] The core of this utility model is to provide a dual-bottle pre-filter, in which the two filtration systems work together to achieve excellent filtration effect, increased flow rate, and thorough and clean sewage discharge.

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] Please refer to Figures 1 to 13 This is a schematic diagram of the structure of a dual-bottle pre-filter and its components provided in a specific embodiment of this utility model.

[0044] In one specific embodiment, the dual-bottle pre-filter provided by this utility model includes a valve head 1 having an inlet 101, an outlet 102, a lower interface and an upper interface, a first filtration system connected to the lower interface, and a second filtration system connected to the upper interface. The first filtration system includes a lower filter bottle 19, a switching component 3 and a water distributor 4 connected to the lower interface, a separation component connected to the water distributor 4, and a separation screw 7 with a water distribution blade 401 disposed inside the separation component and capable of sealing the water distributor 4 at the top. The side wall of the separation component is provided with an oblique hole 502, and the bottom of the separation component is provided with a sedimentation hole 603. It also includes a bottom cover 12 connected to the separation screw 7 and capable of sealing the water flow in the outer cavity of the separation component, a sealing component 8 disposed between the lower filter bottle 19 and the bottom cover 12, a ball valve 9 connected to the sealing component 8, and a reset component 13 that drives the separation screw 7 and the switching component 3 to reset during filtration. The bottom cover 12 has a drain hole 1201.

[0045] In the above structure, the dual-bottle pre-filter has two independent filtration systems. The first filtration system is connected to the lower interface of the valve head 1. The first filtration system includes a lower filter bottle 19, a water distributor 4, a separation component, a separation screw 7, a bottom cover 12, a sealing element 8, a ball valve 9, and a reset element 13. The upper filter bottle 18 receives the filtered water and has a filter element structure inside. Its external thread engages with the internal thread 104 of the valve head 1.

[0046] The valve head 1 is connected to the household water supply at both ends, with the left end being the inlet 101 and the right end being the outlet 102. The lower end has an internal thread 103 that screws into the lower filter bottle 19. The switching component 3 is connected to the lower interface. The upper end of the separating screw 7 is connected to the lower end of the switching component 3. The water passage hole 707 of the separating screw 7 communicates with the water passage hole 304 of the switching component 3. This split-type switching and separating assembly is easy to manufacture. The switching component 3 is used to switch between the filtration and backwashing water paths and control the water flow distribution. The switching component 3 has a first annular groove 301 and a second annular groove 302. A sealing ring is installed in the annular groove to seal the gap between the switching component 3 and the inner insert 2 of the valve head 1.

[0047] The water distributor 4 is connected to the upper end of the lower filter bottle 19. The convex platform 403 of the water distributor 4 is engaged and fixed with the slot of the lower filter bottle 19 to prevent the water distributor 4 from moving downward. The water distributor 4 is located below the switching component 3. The first stream of water in the valve head 1 flows into the water distributor 4 and undergoes the first impurity separation through the annular spiral turbulence of the water distribution blade 401. The separated impurities are deposited on the outside of the separation component.

[0048] The separation component is connected to the water distributor 4, and the separation component and the water distributor 4 are fixed relative to each other. The side wall of the separation component is provided with an inclined hole 502, through which raw water enters the interior of the separation component. The inclined hole 502 guides the water flow to enter at a specific angle, increasing the contact area between the water flow and the separation screw 7, and improving the separation efficiency.

[0049] The separation assembly incorporates a separation screw 7, a design designed to enhance separation and achieve the filtration and separation process. The separation screw 7 can be fixed within the spiral structure of the separation assembly or be a rotatable component. When water flows through the separation screw 7, it is forced to flow along a spiral path. This spiral motion subjects impurities in the water to centrifugal force, pushing them against the sidewalls of the separation assembly and ultimately depositing them at the bottom, where they are discharged via sediment 603 or periodically cleaned. The purified water, after spiral separation, is pushed upwards, flows out through the water passage 707 of the separation screw 7, connects with the water passage 304 of the switching element 3, and finally flows out from the outlet 102, providing a clean water source. This separation process effectively removes impurities from the water.

[0050] The bottom cover 12 is connected to the separating screw 7. The bottom cover 12 moves up and down with the separating screw 7. When the bottom cover 12 moves upward, it can seal the water flow in the outer cavity of the separating component, preventing the water from entering the cavity of the separating component. The sealing element 8 is located at the lower end of the lower filter element. The annular groove is used to install the sealing ring and seal the gap between the sealing element and the lower filter bottle 19, ensuring the sealing performance of the filtration system and preventing leakage. The middle water hole of the sealing element 8 is used to discharge sewage. The external thread of the sealing element 8 mates with the internal thread of the fixing element 1010, and the internal thread mates with the external thread of the ball valve 99. The ball valve 9 is equipped with a switch to control the sewage discharge. Opening the ball valve 9 allows for backwashing and sewage discharge, and closing the ball valve 9 enables filtration.

[0051] When the ball valve 9 drain channel is opened, impurities under negative pressure in the lower filter bottle 19 flow out with the water through the drain hole 1201. The high pressure causes the bottom cover 12 to move downwards, thereby causing the separating screw 77 and the switching element 33 to move downwards. In the filtration state, the bottom cover 12 abuts against the sedimentation hole 603 at the bottom of the separating assembly to prevent impurities from entering the separating assembly. In the flushing state, the bottom cover 12 disengages from the separating assembly to facilitate the discharge of impurities. During filtration, the reset element 13 drives the separating screw 7 and the switching element 3 to reset.

[0052] The second filtration system is connected to the upper interface. The second filtration system includes an upper filter bottle 18, an adapter 14 connected to the upper interface, a filter assembly 15 connected to the adapter 14 and disposed in the upper filter bottle 18, and a scraping assembly 16 disposed on the outer periphery of the filter assembly 15.

[0053] The upper filter bottle 18 receives the filtered water and has an internal filter element structure. Its external thread engages with the internal thread 104 of the valve head 1 to ensure a stable seal and connection. The adapter 14 connects the filter assembly 15 to the injection-molded insert inside the valve head 1, serving to connect and fix the filter assembly 15, ensuring a tight seal and structural stability between the filter assembly 15 and the valve head 1. The filter assembly 15 consists of a frame and a filter screen, and is responsible for the second fine filtration, that is, further processing the filtered water separated by the first filtration system.

[0054] The scraping assembly 16 is located on the outer periphery of the filter assembly 15 and is equipped with a brush. When water flows, it can drive the scraping assembly 16 to scrape the surface of the filter screen and the inner surface of the filter bottle with the brush to remove attached impurities and maintain filtration efficiency.

[0055] The scraping assembly 16 is equipped with a brush, which can be driven by the water flow to scrape the surface of the filter screen and the inner surface of the filter bottle.

[0056] The Tri-Proof Column 17 is made of flexible material and features waterproof hammer, freeze protection, and burst protection. Waterproof hammer refers to protection against impacts caused by sudden changes in water pressure; freeze protection refers to maintaining performance in low-temperature environments; and burst protection refers to the ability to safely release pressure when it is too high, preventing equipment damage.

[0057] The dual-bottle pre-filter provided by this utility model allows raw water to enter from the left end during filtration. It first undergoes initial filtration through the water distributor 4, then passes through the separation mechanism and separation screw 7 of the lower filter bottle 19 for the first stage of filtration. The filtered water then flows back into the lower filter bottle 19, where it undergoes a second stage of filtration through the filter assembly 15. Finally, the purified water flows from the middle of the filter element to the outlet 102 on the right end. This breaks away from conventional pure screen filtration, with two filtration systems working in tandem. By combining the filter screen with the separation assembly and separation screw 7, the filtration effect is improved, the flow rate is increased, the wastewater is thoroughly discharged, and the service life is extended for different water qualities. During rinsing, the bottom drain ball valve 9 opens, putting the filter bottle under negative pressure. The bottom cover 12 moves the separation screw 7 and the switching element 3 downwards, initiating a reverse rinsing mode. The separated impurities are discharged through the drain channel, and all wastewater is ultimately discharged through the drain hole 1201 at the bottom of the filter bottle. By strengthening the spiral separation mechanism, impurities in water can be separated more effectively, providing more efficient water pretreatment. It can remove most large particulate impurities, protect subsequent water purification equipment, extend its service life, and ensure the safety and hygiene of the water.

[0058] Based on the above specific embodiments, the separation component includes a separation cylinder 5 that is snapped into the inner wall of the water separator 4, a separation chamber 6 connected to the lower end of the separation cylinder 5, an inclined hole 502 provided on the side wall of the separation cylinder 5, the separation cylinder 5 being a cylindrical cylinder, the tangent angle between the inclined hole 502 and the cylindrical cylinder being 30°-60°, and the separation chamber 6 being a funnel-shaped chamber with an upper cross section smaller than the lower cross section.

[0059] In one specific embodiment, the separating cylinder 5 is a cylindrical tube that engages with the inner wall of the water distributor 4. For example, multiple second latches 402 of the water distributor 4 engage with the slots 501 of the separating cylinder 5. This design allows the separating cylinder 5 to be stably fixed inside the water distributor 4, ensuring that water can flow smoothly from the water distributor 4 into the lower filter bottle 19. Inclined holes 502 are provided on the side wall of the separating cylinder 5, serving as channels for water to enter the separating cylinder 5. The angle between the inclined holes 502 and the cylindrical tube is 30°-60°. This angle range helps optimize the dynamic characteristics of the water flow, enabling the water to generate appropriate swirling flow upon entering the separating cylinder 5, which aids in the separation of impurities in the water. The swirling flow causes solid particles in the water to be subjected to centrifugal force, thereby separating them.

[0060] The separation chamber 6 is connected to the lower end of the separation cylinder 5. The annular buckle 504 is engaged with the upper buckle 601 of the separation chamber 6. The lower annular groove 503 is fitted with a sealing ring to seal the gap between the separation chamber 6 and the sealing chamber 6.

[0061] The separation chamber 6 is a funnel-shaped chamber with a smaller cross-section at the top than at the bottom. This funnel-shaped design helps to concentrate the water flow and form a sedimentation area at the bottom of the separation chamber 6. Impurities will sink downwards under the influence of the water flow and eventually settle at the bottom of the separation chamber 6, and then be discharged through the sedimentation hole 603.

[0062] The above structure, by optimizing water flow dynamics and utilizing the natural sedimentation characteristics of the funnel-shaped separation chamber 6, can effectively improve the filtration efficiency and impurity removal capacity of the pre-filter. It can not only protect the subsequent water purification equipment, but also reduce maintenance costs and improve water quality.

[0063] Based on the above specific embodiments, the bottom of the separation chamber 6 is provided with an inner convex cavity, and the axial direction of the inner convex cavity is provided with a through hole. The lower end of the separation screw 7 passes through the upper through hole and is placed in the inner convex cavity. The connecting part of the bottom cover 12 passes through the lower through hole and extends into the inner convex cavity to connect with the lower end of the separation screw 7.

[0064] In one specific embodiment, the bottom of the separation chamber 6 is provided with an inner convex cavity, which protrudes inside the separation chamber 6 and has a hollow center. The top surface of the inner convex cavity is provided with an upper through hole, through which the lower end of the separation screw 7 passes. The bottom surface of the inner convex cavity is provided with a lower through hole, through which the connecting part of the bottom cover 12 passes. The upper through hole allows the separation screw 7 to pass through, and the lower through hole allows the connecting part of the bottom cover 12 to pass through. The separation screw 7 and the connecting part of the bottom cover 12 are connected in the hollow of the inner convex cavity. Specifically, the upper internal thread 1203 of the bottom cover 12 can be engaged with the external thread 706 of the separation screw 7.

[0065] The bottom cover 12 moves under the drive of the separating screw 7 to open and close the sedimentation hole 603. When sludge discharge is required, the connecting part of the bottom cover 12 can be moved downward by operating the separating screw 7, thereby opening the sedimentation hole 603 and allowing impurities deposited at the bottom of the separation chamber 6 to be discharged through the sedimentation hole 603. After sludge discharge is completed, the connecting part of the bottom cover 12 can be moved upward by operating the separating screw 7, thereby closing the sedimentation hole 603 and restoring the filter to normal working condition.

[0066] The aforementioned structure features an inner convex cavity design that increases structural stability and provides a fixed connection point for the separating screw 7 and the bottom cover 12, making the entire structure more compact and reducing space occupation. The bottom cover 12 can be opened and closed with simple operation of the separating screw 7, achieving efficient separation and sewage discharge functions of the filter.

[0067] Based on the above specific embodiments, the inner convex cavity is frustum-shaped, the inclination direction of the inner convex cavity sidewall is opposite to the inclination direction of the inner wall of the separation chamber 6, and the deposition hole 603 is provided on the bottom surface of the separation chamber 6 and located in the annular area between the inner convex cavity and the separation chamber 6.

[0068] In one specific embodiment, the inner convex cavity is designed in the shape of a frustum, with different diameters at the top and bottom, and inclined sides. The frustum-shaped inner convex cavity provides a stable structure that can withstand the forces exerted by the bottom cover 12 during the sewage discharge process. The inclination direction of the inner convex cavity sidewall is opposite to that of the inner wall of the separation chamber 6. The closer to the sedimentation hole 603, the smaller the space between the inner convex cavity sidewall and the inner wall of the separation chamber 6, i.e., the narrowing of the flow channel 708. This increases the flow velocity and kinetic energy of the water as it approaches the sedimentation hole 603, resulting in a stronger driving force. This allows the water flow to more effectively push impurities towards the annular area of ​​the inner convex cavity when passing through the separation chamber 6, improving the sedimentation efficiency of impurities and thus promoting sedimentation. The sedimentation hole 603 is located within the annular area between the inner convex cavity and the separation chamber 6.

[0069] The sedimentation hole 603 is located on the bottom surface of the separation chamber 6, within the annular area between the inner convex cavity and the separation chamber 6. This allows deposited impurities to be directly discharged through the sedimentation hole 603, reducing the possibility of impurities re-entering the water flow. The sedimentation hole 603 is designed on the periphery of the inner convex cavity, maintaining a seal when the bottom cover 12 is closed. When drainage is required, the bottom cover 12 is moved by the separation screw 7, opening the sedimentation hole 603 and allowing impurities deposited in the annular area of ​​the inner convex cavity to be discharged. Due to the design of the inner convex cavity and the inner wall of the separation chamber 6, the drainage process is more efficient because the deposited impurities are mainly concentrated in the annular area, facilitating one-time removal and simplifying maintenance and drainage operations.

[0070] Based on the above specific embodiments, the bottom cover 12 includes a disc and a connecting portion. The disc covers the bottom of the separation chamber 6, serving to seal the deposition hole 603. The disc provides good sealing performance, ensuring that no water or impurities leak when the bottom cover 12 is closed. The connecting portion is located in the middle of the disc and is higher than the disc, allowing the connecting portion to pass through the lower through hole of the inner convex cavity and connect to the lower end of the separation screw 7 within the inner convex cavity.

[0071] The drain hole 1201 is located on the disc, on the outer periphery of the connecting part. The drain holes 1201 are evenly distributed on the outer periphery of the connecting part, making the draining operation more efficient and allowing for the even discharge of deposited impurities. When the bottom cover 12 is open, water and impurities can be smoothly discharged from the drain hole 1201. When the bottom cover 12 is closed, the disc can cover and seal the drain hole 1201 to prevent unfiltered water or impurities from leaking out.

[0072] Based on the above specific embodiments, a rubber plug 1202 corresponding to the position of the sedimentation hole 603 is connected to the disc. The main function of the rubber plug 1202 is to seal the sedimentation hole 603, preventing unfiltered water or impurities from leaking out of the hole. In the bottom cover 12 of the filter, the rubber plug 1202 corresponds to the position of the sedimentation hole 603, ensuring that the sedimentation hole 603 is effectively sealed when the bottom cover 12 is closed. The rubber plug 1202 is usually made of corrosion-resistant materials, such as rubber or silicone, which can resist chemicals in water and impurities, extending the service life of the rubber plug 1202. The rubber plug 1202 can be directly plugged in and removed, making it convenient for users to replace.

[0073] Based on the above specific embodiments, the bottom of the separation chamber 6 is provided with an annular boss 602, which supports and positions one end of the reset member 13. The separation screw 7 is provided with an annular rib 705, which contacts the other end of the reset member 13. One end of the reset member 13 abuts against the annular boss 602, and the other end of the reset member 13 abuts against the annular rib 705, so that the reset member 13 can transmit force between the separation screw 7 and the separation chamber 6. The annular boss 602 and the annular rib 705 provide a stable contact point, ensuring that the reset member 13 can effectively transmit force and avoid slippage or failure.

[0074] When the filter needs to be reset, the reset component 13 can be operated to simultaneously apply force to the separating screw 7 and the bottom cover 12, pulling them back to their initial positions and ensuring that the filter can restart the filtration process. The reset component 13 can precisely control the position of the separating screw 7 and the bottom cover 12, ensuring that the filter reset operation is accurate and error-free.

[0075] Based on the above specific embodiments, the annular boss 602 is provided on the top surface of the inner convex cavity, providing a stable contact surface between the inner convex cavity and the separating screw 7. The annular boss 602 can serve as a support point for one end of the reset member 13, ensuring the correct position and stable operation of the reset member 13.

[0076] The bottom of the inner convex cavity is hollowed out, and the bottom of the inner convex cavity is not completely closed, which reduces weight and improves structural strength; it can increase the space between the inner convex cavity and the separation chamber 6, providing more freedom for the connection part of the bottom cover 12, and facilitating the connection part and the separation screw 7.

[0077] Based on the above specific embodiments, the separating screw 7 includes a screw head and a screw rod. The upper end of the screw head is provided with a third annular groove 701 connected to the switching component 3. The side wall of the screw head is provided with a sealing ring 702 for sealing the water distribution blade 401. The water passage hole 707 of the separating screw 7 is provided on the bottom surface of the screw head. The screw rod is provided with a spiral ring 704.

[0078] In the above structure, the separating screw 7 consists of two main parts: a screw head and a screw rod. The screw head is used for connection and sealing with the switching component 3, while the screw rod is responsible for connecting the spiral ring 704 to achieve the filtration and separation functions.

[0079] The main function of the annular groove is to connect with the switching component 3, ensuring a tight fit between the screw head and the switching component 3. This connection can be mechanical or a fixed connection achieved through threads, slots, etc. For example, the upper end of the screw head has a third annular groove 701, and the switching component 3 has a first snap-fit ​​303. The shape and size of the third annular groove 701 and the first snap-fit ​​303 match, and the first snap-fit ​​303 engages with the third annular groove 701. This not only ensures a stable connection between the screw head and the switching component 3 but also helps improve sealing performance and ease of operation. The annular groove simplifies the connection and disassembly process between the screw head and the switching component 3, making maintenance and operation more convenient.

[0080] The sealing ring 702 is provided on the side wall of the screw head, and a layer of silicone is sleeved on its outer end. The sealing ring 702 can press against the water distribution blade 401 to seal the water filter path and has good sealing performance.

[0081] The lower part of the screw head is provided with a fourth annular groove 703, and a sealing ring is installed in the fourth annular groove 703 to seal the gap between the separating screw 7 and the water distributor 4.

[0082] During operation, the system generates strong centrifugal force to separate impurities and particles from the liquid. A rotating, rising water vortex within the separation assembly throws impurities into the drain hole 1201 at the bottom of the separation chamber 6, while purified water is pushed to the water passage hole 707. The water passage hole 707 of the separation screw 7 is located on the bottom surface of the screw head and is connected to the water inlet 304 of the switching component 3. Purified water enters the switching component 3 through the water passage hole 707, ensuring the continuity of the purified water path and guaranteeing the normal operation of the filtration system.

[0083] A spiral ring 704 is connected to the screw. The spiral ring 704 is a ring structure that can be matched with the screw thread. The spiral ring 704 has a large area and promotes water flow, thereby enhancing the separation and filtration effect of the screw.

[0084] Based on the above specific embodiments, the separating screw 7 has an axially penetrating flow channel 708 at its center, forming a small fluid channel inside the screw. A water passage 707 is located on the outer periphery of the flow channel 708. The purified water from the flow channel 708 and the water passage 707 converges at the upper end of the screw and enters the switching element 3. The flow channel 708 generates significant centrifugal pressure at its bottom, which accelerates the downward discharge and deposition of impurities. An isolation mesh 11 is provided on the bottom surface of the separating screw 7 to block impurities outside the flow channel 708, preventing additional impurities from being carried out to the purified water area.

[0085] In a preferred embodiment, an insert 2 is injection molded onto the inner wall of the valve head 1. The insert 2 can be directly injection molded onto the inner wall of the valve head 1 to prevent the leaching of heavy metals.

[0086] In a preferred embodiment, a fixing member 10 is further included, the internal thread of the fixing member 10 being connected and engaged with the external thread of the sealing member 8, and the fixing member 10 being fixed on the filter bottle.

[0087] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0088] The dual-bottle pre-filter provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model. Therefore, this utility model is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dual-bottle pre-filter, characterized in that, The system includes a valve head (1) having an inlet (101), an outlet (102), a lower interface, and an upper interface; a first filtration system connected to the lower interface; and a second filtration system connected to the upper interface. The first filtration system includes a lower filter bottle (19), a switching element (3) connected to the lower interface, a water distributor (4), a separation assembly connected to the water distributor (4), and a separation screw (7) with water-distributing blades (401) disposed within the separation assembly and capable of sealing the upper part of the water distributor (4). The side wall of the separation component is provided with an oblique hole (502), and the bottom of the separation component is provided with a sedimentation hole (603); it also includes a bottom cover (12) connected to the separation screw (7) and capable of sealing the water flow in the outer cavity of the separation component, a sealing element (8) provided between the lower filter bottle (19) and the bottom cover (12), a ball valve (9) connected to the sealing element (8), and a reset element (13) that drives the separation screw (7) and the switching element (3) to reset during filtration. The bottom cover (12) has a drain hole (1201).

2. The dual-bottle pre-filter according to claim 1, characterized in that, The separation assembly includes a separation cylinder (5) that is snapped into the inner wall of the water separator (4) and a separation chamber (6) connected to the lower end of the separation cylinder (5). The inclined hole (502) is provided on the side wall of the separation cylinder (5). The separation cylinder (5) is a cylindrical cylinder. The angle between the inclined hole (502) and the cylindrical cylinder is 30°-60°. The separation chamber (6) is a funnel-shaped chamber with a cross-section at the upper end smaller than that at the lower end.

3. The dual-bottle pre-filter according to claim 2, characterized in that, The bottom of the separation chamber (6) is provided with an inner convex cavity, and the axial direction of the inner convex cavity is provided with a through hole. The lower end of the separation screw (7) passes through the upper through hole and is placed in the inner convex cavity. The connecting part of the bottom cover (12) passes through the lower through hole and extends into the inner convex cavity to connect with the lower end of the separation screw (7).

4. The dual-bottle pre-filter according to claim 3, characterized in that, The inner convex cavity is frustum-shaped, and the inclination direction of the side wall of the inner convex cavity is opposite to the inclination direction of the inner wall of the separation chamber (6). The deposition hole (603) is located on the bottom surface of the separation chamber (6) and is located in the annular area between the inner convex cavity and the separation chamber (6).

5. The dual-bottle pre-filter according to claim 3, characterized in that, The bottom cover (12) includes a disc and the connecting part, the connecting part is located in the middle of the disc and is higher than the disc, and the drain hole (1201) is provided on the disc and is located on the outer periphery of the connecting part.

6. The dual-bottle pre-filter according to claim 5, characterized in that, The disk is connected to a rubber plug (1202) corresponding to the position of the deposition hole (603).

7. The dual-bottle pre-filter according to claim 3, characterized in that, The bottom of the separation chamber (6) is provided with an annular boss (602), and the separation screw (7) is provided with an annular rib (705). One end of the reset member (13) abuts against the annular boss (602), and the other end abuts against the annular rib (705).

8. The dual-bottle pre-filter according to claim 7, characterized in that, The annular boss (602) is provided on the top surface of the inner convex cavity, and the bottom surface of the inner convex cavity is hollowed out.

9. The dual-bottle pre-filter according to any one of claims 1-8, characterized in that, The separating screw (7) includes a screw head and a screw rod. The upper end of the screw head is provided with a third annular groove (701) connected to the switching component (3). The side wall of the screw head is provided with a sealing ring (702) for sealing the water-separating blade (401). The water passage hole (707) of the separating screw (7) is provided on the bottom surface of the screw head. The screw rod is provided with a spiral ring (704).

10. The dual-bottle pre-filter according to claim 9, characterized in that, The center of the separating screw (7) is provided with an axially penetrating flow channel (708), and the bottom surface of the separating screw (7) is provided with an isolation net (11).

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