Central water purifier and multi-core water power backwash pre-filter thereof

Abstract

The application provides a central water purifier and a multi-core water power backwashing pre-filter thereof, which comprises a joint assembly provided with a flow channel, a water inlet, a water outlet and a water distribution outlet in communication; a valve head assembly comprising a valve head and at least two water distribution parts arranged in the inner cavity of the valve head, and the valve head is provided with a filter bottle mounting part corresponding to each water distribution part; at least two filter bottle assemblies are connected to the filter bottle mounting part respectively, and each filter bottle assembly comprises a bottle body, a valve, a filter core, a water distributor, a switching assembly, an impeller assembly and a scraping and cleaning assembly arranged in the inner cavity of the bottle body; the water distribution part is used for introducing filtered water into the inner cavity of the bottle body; the switching assembly is arranged in the filter core and is used for switching a filtered water path and a backwashing water path; the switching assembly is connected to the impeller assembly, the impeller assembly is connected to the scraping and cleaning assembly and is used for providing power to the scraping and cleaning assembly, and the scraping and cleaning assembly is used for scraping and cleaning the bottle body and the filter core under the power. The application improves the filtering precision of the pre-filter, improves the flushing effect and reduces the cost.

Description

Technical Field

[0001] This application relates to the field of water purification equipment technology, and more specifically, to a multi-core hydrodynamic backwashing pre-filter. It also relates to a central water purifier including the aforementioned multi-core hydrodynamic backwashing pre-filter. Background Technology

[0002] The city's water supply pipelines are old and long. Rust, silt and other impurities in the pipelines can cause water-using equipment to malfunction. Therefore, it is necessary to install pre-filters on the pipelines to filter out impurities and improve the water quality downstream of the pre-filter.

[0003] Pre-filters are typically installed after the water meter. Their main function is to restore tap water to its pre-treatment standard, protecting downstream equipment. Pre-filters have a filtration precision of 5-100 microns, filtering out visible impurities such as sediment, rust, and suspended matter. This extends the lifespan of downstream high-end water purification equipment and maintains a superior customer experience.

[0004] Existing pre-filters employ a dual-screen structure, with two screens installed on the inner and outer sides of a filter housing frame. During wastewater discharge, the outer screen surface is rinsed to achieve cleaning. However, due to the small gap between the screens, prolonged use leads to an accumulation of impurities between the two screens, which are difficult to remove completely, easily causing blockages. This results in reduced flow rate and lower water output, impacting household water usage and ultimately reducing the overall lifespan of the unit. Utility Model Content

[0005] This application provides a central water purifier and its multi-core hydrodynamic backwashing pre-filter, which improves filtration accuracy, enhances backwashing effect, and reduces cost.

[0006] This application also provides a central water purifier with high filtration accuracy.

[0007] This application provides a multi-core hydrodynamic backwashing pre-filter, comprising:

[0008] The connector assembly is provided with a flow channel and an inlet, an outlet and a branch outlet connected to the flow channel;

[0009] A valve head assembly is connected to the water distribution port. The valve head assembly includes a valve head and at least two water distribution components disposed in the inner cavity of the valve head and distributed along a first direction. The valve head is provided with filter bottle mounting parts corresponding to each of the water distribution components.

[0010] At least two filter bottle assemblies are respectively connected to the filter bottle mounting part. Each filter bottle assembly includes a bottle body, a valve disposed at the bottom of the bottle body, and a filter element, a water distributor, a switching assembly, an impeller assembly, and a scraping assembly disposed in the inner cavity of the bottle body. The water distributor is disposed between the filter element and the bottle body and is used to introduce filtered water into the inner cavity of the bottle body. The switching assembly is disposed inside the filter element and is used to switch between the filtered water path and the backwash water path. The switching assembly is connected to the impeller assembly, and the impeller assembly is connected to the scraping assembly and is used to provide power to the scraping assembly. The scraping assembly is sleeved on the outer periphery of the filter element and is used to scrape the bottle body and the filter element under power.

[0011] In some embodiments, the water distribution element in the inner cavity of the valve head corresponding to the water outlet area includes a water distribution body, which encloses a clean water cavity and an outer cavity located outside the clean water cavity. The clean water cavity is connected to the flow channel via a connector rib. The water distribution element in the inner cavity of the valve head, excluding the area where the water outlet is located, includes a water distribution body. The water distribution body is provided with an annular rib and a first cavity. The first cavity is connected to the raw water. The annular rib is fitted into the filter element and used to transport filtered water to the outer cavity. Adjacent water distribution elements are connected by an adapter.

[0012] In some embodiments, the switching assembly includes a switching element and a resetting element. The switching element has a chamber inside and a plurality of slots communicating with the chamber on its top. The outer wall of the switching element has a pressing edge and a limiting rib. The pressing edge is used to cooperate with the inner skeleton of the filter element to open or close the filtered water passage. The resetting element abuts against the limiting rib and is used to provide elastic pressure and resetting force to the switching element.

[0013] In some embodiments, a waterproof hammer component disposed in the chamber of the switching member is also included, the waterproof hammer component being a waterproof hammer component made of a soft, compressible material.

[0014] In some embodiments, the impeller assembly includes an outer cover and an impeller. The outer cover encloses a mounting cavity, and the impeller is disposed in the mounting cavity. The outer cover is provided with a plurality of upper cover drain holes and a plurality of lower cover drain holes. The plurality of upper cover drain holes, the mounting cavity, and the plurality of lower cover drain holes are connected to form a water flow channel to drive the impeller to rotate. The impeller is connected to the scraping assembly.

[0015] In some embodiments, the switching assembly further includes a linkage for connecting the switching element and the scraping assembly.

[0016] In some embodiments, the connecting rod has a cavity, and the cavity is provided with a magnet for attracting impurities.

[0017] In some embodiments, the scraping assembly includes a cylinder and double-sided brushes disposed on the outer and inner circumferential surfaces of the cylinder.

[0018] In some embodiments, the cylinder is provided with helical ribs arranged helically in the axial and circumferential directions, and a turbine is provided on the upper part of the cylinder.

[0019] This utility model also provides a central water purifier, including the multi-core hydrodynamic backwashing pre-filter described in the above embodiments.

[0020] The multi-core hydrodynamic backwashing pre-filter provided in this application adopts a dual-bottle filtration structure. Raw water enters through the inlet of the upper valve head assembly and flows into the inner cavity of the first bottle for the first layer of filtration. The purified water flows through the inner cavity of the water distributor at the upper end of the filter element in the first bottle, then into the outer cavity of the second water distributor, and finally into the second bottle for the second layer of fine filtration. Subsequently, it can flow into other bottles for multiple layers of fine filtration. Finally, the purified water from these multiple filtration stages flows from inside the filter element to the outlet of the connector assembly, ultimately being delivered to the downstream household water supply. This design ensures sufficient filtration intervals, increasing flow rate and improving filtration efficiency. Furthermore, the ball valve bottom allows for tiered (dual backwashing) sewage discharge without interference, resulting in higher filtration accuracy, more efficient transition, and a longer filter element lifespan. In addition, this application employs a tiered, multi-core hydrodynamic backwashing filtration structure, achieving higher filtration efficiency, better results, and more thorough filtration through multiple stages, while also saving on filter operating costs. The tiered filtration structure ensures sufficient filtration working gaps, resulting in increased flow rate and improved filtration effect. The bottom of the valve allows for tiered (double backwashing) sewage discharge without interference, leading to higher working efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application 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 embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 A cross-sectional view of a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application;

[0023] Figure 2 A cross-sectional view of a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application when it is in the filtration state;

[0024] Figure 3 A schematic diagram of a multi-core hydrodynamic backwashing pre-filter in the backwashing state, provided for some embodiments of this application;

[0025] Figure 4 A schematic diagram of the connector assembly in a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application;

[0026] Figure 5 This is a schematic diagram of the structure of the first valve head in a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application;

[0027] Figure 6 This is a schematic diagram of the structure of the second valve head in a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application;

[0028] Figure 7 A cross-sectional view of the first water distribution element in a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application;

[0029] Figure 8 A cross-sectional view of the second water distribution element in a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application;

[0030] Figure 9 A cross-sectional view of a switching element in a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application;

[0031] Figure 10 This is a schematic diagram of the water distributor in a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application;

[0032] Figure 11 This is a schematic diagram of the structure of the upper cover in a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application;

[0033] Figure 12 This is a schematic diagram of the impeller structure in a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application;

[0034] Figure 13 This is a schematic diagram of the structure of the lower cover of a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application;

[0035] Figure 14 This is a structural schematic diagram of the lower cover of a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application from another perspective.

[0036] Figure 15 This is a schematic diagram of the structure of the seal in a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application;

[0037] Figure 16 A cross-sectional view of a connecting rod in a multi-core hydrodynamic backwash pre-filter provided in some embodiments of this application;

[0038] Figure 17This is a schematic diagram of the scraping component in a multi-core hydrodynamic backwashing pre-filter provided in some embodiments of this application.

[0039] The attached figures are labeled as follows:

[0040] 10 - Connector assembly; 20 - Valve head assembly; 30 - Filter bottle assembly;

[0041] 11-Connector; 12-Nut; 13-Sealing gasket; 14-Universal copper seat; 15-Collar ring; 16-Pin; 21-Valve head; 22-Diverter; 23-Adapter; 31-Bottle body; 32-Filter element; 33-Valve; 34-Seal; 35-Diverter; 36-Switching assembly; 37-Impeller assembly; 38-Scrubber assembly;

[0042] 21a-First valve head; 211a-Valve head annular groove; 212a-Bottom embossing; 213a-First valve head screw hole; 21b-Second valve head; 211b-Upper end groove; 212b-Second valve head screw hole; 213b-Valve head mounting hole; 214b-Internal thread; 22a-First water distribution component; 221a-First cavity; 222a-First rib; 22b-Second water distribution component; 221b-Upper water outlet; 222b-Clean water cavity; 223b-Outer cavity;

[0043] 101-Inlet; 102-Flow channel; 103-Outlet; 104-Diverter; 141-Connector rib; 142-First annular groove; 143-Second annular groove; 341-Raised rib; 351-Protrusion; 352-Diverter blade; 361-Switching component; 362-Reset component; 363-Connecting rod; 364-Waterproof hammer component; 365-Magnet; 371-Upper cover; 372-Impeller; 373-Lower cover; 381-Cylinder; 382-Brush cover; 383-Spiral rib; 384-Turbine; 385-Scrubber skeleton groove;

[0044] 3611-Slot; 3612-Pressure edge; 3613-Sealing groove; 3614-Limiting rib; 3631-Thread; 3632-Cavity; 3633-Annular groove; 3711-Upper cover drain hole; 3712-Upper cover slot; 3721-Impeller tooth; 3722-Cylindrical surface; 3723-Polygonal surface; 3731-Lower cover drain hole; 3732-Lower cover tooth; 3733-Lower cover buckle; 3734-Mounting hole; 3735-Lower cover rib;

[0045] X - First direction. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0048] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0051] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0052] In this application, "multiple" means two or more (including two).

[0053] Please refer to Figure 1 This application provides a multi-core hydrodynamic backwashing pre-filter, including a connector assembly 10, a valve head assembly 20, and at least two filter bottle assemblies 30. The connector assembly 10 is provided with a flow channel 102, an inlet 101, an outlet 103, and a branch outlet 104. The inlet 101 and outlet 103 are respectively located at both ends of the flow channel 102, and the branch outlet 104 is located in the middle of the flow channel 102. The inlet 101, outlet 103, and branch outlet 104 are all connected to the flow channel 102. The valve head assembly 20 is connected to the branch outlet 104. The valve head assembly 20 includes a valve head 21 and at least two branching elements 22. The branching elements 22 are disposed within the inner cavity of the valve head and distributed along a first direction X. The valve head is provided with at least two filter bottle mounting portions, each corresponding to one of the branching elements 22, to facilitate the mounting of the branching elements 22 onto the filter bottle mounting portions.

[0054] It should be noted that the first direction X in the embodiments of this application can be Figure 1 The horizontal direction in the middle.

[0055] Each filter bottle assembly 30 is connected to a corresponding filter bottle mounting part. Each filter bottle assembly 30 includes a bottle body 31, a valve 33, a filter element 32, a water distributor 35, a switching assembly 36, an impeller assembly 37, and a scraping assembly 38. The valve 33 is located at the bottom of the bottle body 31. The filter element 32, water distributor 35, switching assembly 36, impeller assembly 37, and scraping assembly 38 are all located within the inner cavity of the bottle body 31. The water distributor 35 is located between the filter element 32 and the bottle body 31, enabling filtered water to be introduced into the inner cavity of the bottle body 31.

[0056] like Figure 10 As shown, the top of the water distributor 35 has multiple circumferentially distributed protrusions 351, each protrusion 351 correspondingly engaging into a groove in the bottle body 31 for positioning. The water distributor 35 also has multiple circumferentially distributed water-distributing blades 352, through which filtered water flows into the cavity of the bottle body 31. The switching assembly 36 is located inside the filter element 32 and can switch between the filtered water path and the backwash water path. The switching assembly 36 is connected to the impeller assembly 37, which is connected to the scraping assembly 38, providing power to the scraping assembly 38. The scraping assembly 38 is fitted around the outer periphery of the filter element 32 and is used to scrape the bottle body 31 and the filter element 32 under power.

[0057] The following explanation uses two bottles (31) as an example to illustrate the principles of filtration and backwashing. (Reference) Figure 2 and Figure 3This application adopts a graded, multi-core hydrodynamic backwashing filtration structure. In the filtration state, the source water enters the left connector through the inlet 101 of the connector assembly 10 and then flows to the universal copper base 14. At this time, the water flows from the inner cavity of the second valve head into the inner cavity of the first valve head, and then through the outer cavity of the first water distribution component 22a to reach the cavity of the filter bottle at the lower end of the first bottle body for the first stage of filtration. The first-stage filtered water is then transported from the inside of the filter element 32 to the inner cavity of the first water distribution component 22a, and then flows from the inner cavity of the first water distribution component 22a into the outer cavity of the second water distribution component 22b to reach the inner cavity of the second bottle body for the second stage of filtration. The filtered clean water enters the right end outlet 103 of the universal copper base 14 from the inner cavity of the second water distribution component 22b and is discharged from the outlet 103. In the backwashing state, opening valve 33 allows for graded sewage discharge. Under the pressure of the water flow, impeller assembly 37 can drive switching assembly 36 to move downwards. The filter water path is closed by switching component 361, and the backwash water path is opened. Water flows from the inside to the outside to flush. At the same time, impeller assembly 37 can drive scraping assembly 38 to scrape and discharge sewage at the same time.

[0058] refer to Figure 4 Combination Figure 1 The connector assembly 10 includes a connector 11, a nut 12, a sealing gasket 13, a universal copper seat 14, a collar 15, and a pin 16. The connector 11 uses a heat fusion joint to connect to the household pipes, and water flows from the left end of the heat fusion joint 11 into the universal copper seat 14. The nut 12 connects to the universal copper seat 14 by engaging its internal thread with the external thread of the universal copper seat 14. A sealing gasket 13 is pressed into the annular groove of the connector to prevent water from leaking out from the gap. The sealing gasket 13 is used to seal the gap between the universal copper seat 14 and the connector 11. The external thread of the universal copper seat 14 is connected to the internal thread of the nut 12. The universal copper seat 14 is provided with a flow channel 102, one end of which is the water inlet 101 and the other end is the water outlet 103. The interior of the universal copper seat 14 is provided with a circular joint rib 141, which is fitted with the water distribution component 22. The first annular groove 142 on the outside of the universal copper seat 14 is inserted into the pin 16, and the second annular groove 143 is fitted with a sealing ring to seal the gap between the universal copper seat 14 and the valve head 21.

[0059] The universal copper seat 14 can rotate 360 ​​degrees to meet installation requirements. The collar 15 is used to press the four pins 16 together, and is internally engaged with the groove on the outer wall of the second valve head by a snap fastener, securing the pins 16 to prevent them from falling out. The pins 16 are engaged in the groove of the valve head 21 and the first annular groove 142 of the universal copper seat 14 for limiting and fixing.

[0060] Valve 33 may be, but is not limited to, a ball valve. Valve 33 is equipped with a switch knob. By operating the switch knob, valve 33 is opened, and sewage is backwashed and discharged. When valve 33 is closed, it returns to the filtration state.

[0061] like Figure 15As shown. The seal 34 is installed on the inner bottom of the bottle body 31. The bottom of the seal 34 is threadedly connected to the valve 33, and the top surface of the seal 34 has raised ribs 341. During backwashing, the impeller assembly 37 moves down, and the two raised ribs 341 engage with the lower cover raised ribs 3735. When the impeller assembly 37 is jammed by impurities, external force can rotate the seal 34 to drive the impeller assembly 37 to rotate and assist in sewage discharge. An O-ring is pressed onto the upper end of the valve 33 to seal the connection gap between it and the seal 34.

[0062] In addition, to facilitate the detection of the internal water pressure of the valve head 21, a pressure gauge can be installed on the valve head 21. The pressure gauge can monitor and display the fluid pressure inside the valve head 21 in real time to ensure the safe and stable operation of the filter.

[0063] In one specific embodiment, the water distribution component 22 in the inner cavity of the valve head corresponding to the area of ​​the water outlet 104 includes a water distribution body, which encloses a clean water chamber 222b and an outer cavity 223b. The clean water chamber 222b is connected to the flow channel 102 through a connector rib 141. The water distribution component 22 in the inner cavity of the valve head, excluding the area where the water outlet 104 is located, includes a water distribution body. The water distribution body is provided with an annular rib and a first cavity. The first cavity is connected to the raw water. The annular rib is fitted into the filter element 32, which can deliver filtered water to the outer cavity 223b. Adjacent water distribution components 22 are connected through an adapter 23.

[0064] The following explanation uses two filter bottle assemblies 30 (i.e., a dual-bottle filtration structure) as an example to illustrate the structure of the valve head assembly 20 and the principle of the pre-filter in this application.

[0065] like Figure 5 and Figure 6 As shown. The valve heads 21 are a first valve head 21a and a second valve head 21b. The upper end slot 211b of the second valve head 21b is connected to the universal copper seat 14 and the pin 16 is inserted. The valve head mounting hole 213b is connected to the first valve head 21a. The screw hole 213a of the first valve head is connected to the screw hole 212b of the second valve head and the screw is driven in for fixation. The internal thread 214b is threaded to the bottle body 31.

[0066] The inner cavity of the bottle body 31 is used to receive filtered water. A filter element 32 is installed inside the bottle body 31. The upper end of the inner skeleton of the filter element 32 is fixed by a water distributor 35. A filter screen is fitted onto the outer surface of the inner skeleton to filter impurities. The upper threads of the two bottles 31 respectively mate with the bottom embossed 212a of the first valve head 21a and the internal thread 214b of the second valve head 21b. A sealing ring is installed in the annular groove at the upper end of the bottle body threads to seal the gap between the bottle body 31 and the valve head, preventing water leakage to the outside of the bottle body 31. Furthermore, a scale-inhibiting filter element can be installed inside the inner skeleton to prevent scale buildup.

[0067] The right port of the first valve head 21a is connected to the second valve head 21b. A sealing ring is installed in the annular groove 211a of the valve head to seal the gap. The bottom embossing 212a is threaded to the bottle body 31.

[0068] like Figure 7 and Figure 8 As shown. The two water distribution components 22 are the first water distribution component 22a and the second water distribution component 22b, respectively. The upper water outlet 221b of the second water distribution component 22b is connected to the circular connector protrusion 141 of the universal copper base 14, which can deliver purified water. The annular first protrusion 222a of the first water distribution component 22a is fitted into the top water outlet 103 of the second filter element 32. The purified water chamber 222b is vertically arranged and is connected to the outer chamber 223b, so that the first filtered water can flow into the outer chamber 223b. The first chamber 221a of the first water distributor 22a is connected to the raw water. The annular rib is inserted into the upper end of the first filter element 32 assembly to form the second chamber, which delivers filtered water to the outer chamber 223b of the second water distributor 22b. The adapter 23 connects two adjacent water distributors. Taking this embodiment as an example, the first water distributor 22a and the second water distributor 22b are connected by the adapter 23. The adapter 23 connects the second chamber of the first water distributor 22a and the outer chamber 223b of the second water distributor 22b, delivering the first stage of filtered water.

[0069] This embodiment employs a dual-bottle filtration principle. Raw water enters from the left side of the upper universal copper base 14, flows from the outer cavity into the first filter bottle cavity on the left for the first layer of filtration, and then flows through the inner cavity of the first water distribution component 22a at the upper end of the first filter element 32, enters the outer cavity 223b of the second water distribution component 22b, and then flows into the second filter bottle for the second layer of fine filtration. Finally, the purified water from the two filtration stages is transported from inside the second filter element 32 to the right end of the universal copper base 14 and the rear end of the household water supply. This ensures sufficient filtration working gaps, resulting in increased flow rate and improved filtration effect.

[0070] refer to Figure 9 and combined Figure 1 In one specific embodiment, the switching assembly 36 includes a switching element 361 and a resetting element 362. The switching element 361 has a chamber inside, and the top of the switching element 361 has a plurality of slots 3611 communicating with the chamber. The outer wall of the switching element 361 has a pressing edge 3612 and a limiting rib 3614. The pressing edge 3612 is used to cooperate with the inner skeleton of the filter element 32 to open or close the filtration water passage. The resetting element 362 abuts against the limiting rib 3614 to provide elastic pressure and resetting force for the switching element 361.

[0071] Specifically, the switching element 361 is located inside the inner frame of the filter element 32, and can switch between the filtration water path and the backwash water path. During backwashing, water flows into the filter element 32 from the multiple densely distributed slots 3611 at the top for backwashing. The annular pressing edge 3612 of the switching element 361 closes the downward filtration water path during backwashing. A sealing ring is installed in the sealing groove 3613 to seal its gap. The lower thread of the switching element 361 engages with the thread 3631 of the connecting rod 363. The lower end of the limiting rib 3614 is connected to the reset element 362. The reset element 362 can be a spring. The reset element 362 is installed between the switching element 361 and the inner frame, providing elastic pressure and reset force, and resetting the switching element 361.

[0072] In this embodiment of the application, a switching element 361 is provided inside the inner frame to switch between the filtration water path and the backwash water path, so as to meet the switching requirements of filtration or backwashing.

[0073] Furthermore, a waterproof hammer 364 can be provided inside the switching component 361. The waterproof hammer 364 is located in the cavity of the switching component 361 and is made of soft compressible material. It plays the role of waterproof hammer, freezing and bursting, thereby improving the performance of the switching component 361.

[0074] refer to Figure 11 , Figure 12 , Figure 13 and Figure 14 In one specific embodiment, the impeller assembly 37 includes an outer cover and an impeller 372. The outer cover encloses and forms a mounting cavity, and the impeller 372 is disposed in the mounting cavity. The outer cover is provided with multiple upper cover drain holes 3711 and multiple lower cover drain holes 3731. The multiple upper cover drain holes 3711, the mounting cavity, and the multiple lower cover drain holes 3731 are connected to form a water flow channel, thereby driving the impeller 372 to rotate. The impeller 372 is connected to the scraping assembly 38.

[0075] Specifically, the outer cover includes an upper cover 371 and a lower cover 373. The upper cover 371 is provided with an upper cover groove 3712, and the lower cover 373 is provided with a lower cover buckle 3733. The upper cover 371 and the lower cover 373 are fixed by engaging with the upper cover groove 3712 through the lower cover buckle 3733, and an installation cavity is formed inside. The impeller 372 is installed in the installation cavity.

[0076] In addition, the upper cover 371 is provided with multiple upper cover drain holes 3711, which can be oblique holes. The lower cover 373 is provided with multiple lower cover drain holes 3731. Water flows into the installation cavity from the upper cover drain holes 3711 of the upper cover 371 and then flows out from the lower cover drain holes 3731, which can drive the impeller 372 to rotate rapidly. The lower cover 373 is provided with annular lower cover retaining teeth 3732, which engage with the annular impeller retaining teeth 3721 of the impeller 372. Rotating the lower cover 373 can drive the impeller 372 to rotate together. The impeller 372 is installed inside the installation cavity. The cylindrical surface 3722 fits with the upper cover 371, and the polygonal surface 3723 fits with the scraping frame groove 385. Water flowing through the impeller can drive the impeller to rotate, thereby driving the scraping assembly 38 to rotate and scrape the filter screen surface.

[0077] like Figure 16 As shown. Further, a connecting rod 363 is also provided in the inner cavity of the bottle body 31. The lower cover 373 is fitted into the connecting rod 363 through the mounting hole 3734 in the middle. The connecting rod 363 connects the switching component 361 and the scraping assembly 38. The threads 3631 of the connecting rod 363 cooperate with the external threads 3631 of the switching component 361. The connecting rod 363 is fitted into the middle circular hole of the lower cover 373. The annular groove 3633 is fitted with a sealing ring to seal the gap between the connecting rod 363 and the scraping assembly 38. The annular groove 3633 is engaged with a retaining ring. Thus, the switching component 361 and the impeller assembly 37 are connected together through the connecting rod 363.

[0078] like Figure 1 As shown. To prevent scale formation, a magnet 365 can be installed in the cavity 3632 of the connecting rod 363. The magnet 365 can be used to attract rust and change the crystal form of calcium and magnesium salt scale, making it change from needle-like to granular, or making it soft, fall off, and magnetized, thereby preventing scale formation and achieving the purpose of water purification.

[0079] like Figure 17 As shown. In one specific embodiment, the scraping assembly 38 includes a cylindrical body 381 and double-sided brushes disposed on the outer and inner circumferential surfaces of the cylindrical body 381. A brush cover 382 is disposed on the top of the scraping assembly 38. When the scraping assembly 38 rotates, the double-sided brushes can scrape the outer surface of the filter screen and the inner surface of the bottle body 31. The cylindrical body 381 is provided with spiral ribs 383 arranged spirally along the axial and circumferential directions. A turbine 384 is disposed on the outer circumferential surface of the brush cover 382. The turbine 384 can enhance the water flow and increase the rotational force of the water flow.

[0080] In addition, this application also provides a central water purifier, including the above-mentioned multi-core hydrodynamic backwashing pre-filter. The central water purifier adopts a dual-stage filtration system and a forward and reverse flushing structure, which has high filtration efficiency, good filtration effect, no need for frequent disassembly and replacement of filter components, and long service life.

[0081] The above provides a detailed description of the central water purifier and its multi-core hydrodynamic backwashing pre-filter provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A multi-core hydrodynamic backwashing pre-filter, characterized in that, include: The connector assembly (10) is provided with a flow channel (102) and an inlet (101), an outlet (103) and a branch outlet (104) connected to the flow channel (102). A valve head assembly (20) is connected to the water distribution port (104). The valve head assembly (20) includes a valve head (21) and at least two water distribution components (22) disposed in the inner cavity of the valve head (21) and distributed along a first direction. The valve head (21) is provided with a filter bottle mounting part corresponding to each of the water distribution components (22). At least two filter bottle assemblies (30) are respectively connected to the filter bottle mounting part. Each filter bottle assembly (30) includes a bottle body (31), a valve (33) disposed at the bottom of the bottle body (31), and a filter element (32), a water distributor (35), a switching assembly (36), an impeller assembly (37), and a scraping assembly (38) disposed in the inner cavity of the bottle body (31). The water distributor (22) is disposed between the filter element (32) and the bottle body (31) and is used to introduce filtered water into the filter bottle. The inner cavity of the bottle body (31); the switching component (36) is disposed inside the filter element (32) and is used to switch the filtration water path and the backwash water path; the switching component (36) is connected to the impeller assembly (37), the impeller assembly (37) is connected to the scraping assembly (38) and is used to provide power to the scraping assembly (38); the scraping assembly (38) is sleeved on the outer periphery of the filter element (32) and is used to scrape the bottle body (31) and the filter element (32) under power.

2. The multi-core hydrodynamic backwashing pre-filter according to claim 1, characterized in that, The water distribution component (22) in the inner cavity of the valve head (21) corresponding to the water distribution port area includes a water distribution body. The water distribution body encloses and forms a clean water cavity (222b) and an outer cavity (223b) located outside the clean water cavity (222b). The clean water cavity (222b) is connected to the flow channel (102) through a connector rib (141). The water distribution component (22) in the inner cavity of the valve head (21), excluding the area where the water distribution port (104) is located, includes a water distribution body. The water distribution body is provided with an annular rib and a first cavity (221a). The first cavity (221a) is connected to the raw water. The annular rib is fitted into the filter element (32) and is used to transport filtered water to the outer cavity (223b). Adjacent water distribution components (22) are connected by a connector (23).

3. The multi-core hydrodynamic backwashing pre-filter according to claim 2, characterized in that, The switching assembly (36) includes a switching element (361) and a resetting element (362). The switching element (361) has a chamber inside, and the top of the switching element (361) has a plurality of slots (3611) communicating with the chamber. The outer wall of the switching element (361) is provided with a pressing edge (3612) and a limiting rib (3614). The pressing edge (3612) is used to cooperate with the inner skeleton of the filter element (32) to open or close the filter water path. The resetting element (362) abuts against the limiting rib (3614) and is used to provide elastic pressure and resetting force to the switching element (361).

4. The multi-core hydrodynamic backwashing pre-filter according to claim 3, characterized in that, It also includes a waterproof hammer (364) disposed in the chamber of the switching member (361), the waterproof hammer (364) being a waterproof hammer made of a soft compressible material.

5. The multi-core hydrodynamic backwashing pre-filter according to claim 1, characterized in that, The impeller assembly (37) includes an outer cover and an impeller (372). The outer cover encloses and forms an installation cavity. The impeller (372) is disposed in the installation cavity. The outer cover is provided with a plurality of upper cover drain holes (3711) and a plurality of lower cover drain holes (3731). The plurality of upper cover drain holes (3711), the installation cavity and the plurality of lower cover drain holes (3731) are connected to form a water flow channel to drive the impeller (372) to rotate. The impeller (372) is connected to the scraping assembly (38).

6. The multi-core hydrodynamic backwashing pre-filter according to claim 4, characterized in that, The switching assembly (36) further includes a link (363) for connecting the switching element (361) and the scraping assembly (38).

7. The multi-core hydrodynamic backwashing pre-filter according to claim 6, characterized in that, The connecting rod (363) is provided with a cavity (3632), and the cavity (3632) is provided with a magnet (365) for adsorbing impurities.

8. The multi-core hydrodynamic backwashing pre-filter according to claim 7, characterized in that, The scraping assembly (38) includes a cylinder (381) and double-sided brushes disposed on the outer and inner circumferential surfaces of the cylinder (381).

9. The multi-core hydrodynamic backwashing pre-filter according to claim 8, characterized in that, The cylinder (381) is provided with spiral ribs (383) arranged spirally along the axial and circumferential directions, and a turbine (384) is provided on the upper part of the cylinder (381).

10. A central water purifier, characterized in that, Includes the multi-core hydrodynamic backwash pre-filter as described in any one of claims 1 to 9.

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