Multifunctional combination filter cartridge

Abstract

The present application relates to the field of filter element, and discloses a multifunctional combined filter element, which comprises a first filter body, a second filter body and a third filter body, each of which has a water inlet end and a water outlet end in communication with each other; the water outlet end of the first filter body is detachably matched and inserted with the water inlet end of the second filter body, and a first filter cotton sheet is arranged between the first filter body and the second filter body; the water outlet end of the second filter body is detachably matched and inserted with the water inlet end of the third filter body, and a second filter cotton sheet is arranged between the second filter body and the third filter body; the combined single-branch structure of the axial matching and insertion of the filter bodies is compact in overall structure and low in manufacturing cost; the detachable matching and insertion of the butt joint structure between the filter bodies and the detachable arrangement of the filter cotton sheets can independently realize disassembly and replacement, thereby reducing the overall replacement cost and the later maintenance cost of the filter element and prolonging the service life of the combined filter element.

Description

Technical Field

[0001] This invention relates to the field of filter elements, and more particularly to water pollution control and treatment and environmental protection, specifically to a multifunctional combined filter element. Background Technology

[0002] As the core component of a water purifier, the performance of the filter element directly determines the filtration effect and water safety. In the field of water purifier technology, filter elements typically employ principles such as physical filtration, adsorption, ion exchange, or membrane separation. Functionally, they can be categorized into various types, including pre-filters, activated carbon filters, reverse osmosis membrane filters, ultrafiltration membrane filters, and post-filter composite filters. These different types of filter elements work together to meet various water purification needs, such as removing suspended solids, residual chlorine, heavy metals, bacteria, viruses, and organic matter. Improving the green and environmentally friendly aspects of the water purification process and reducing the environmental impact of the filter element throughout its entire lifecycle remains a key area of ​​focus in this field.

[0003] Currently, most commercially available water purifier filter cartridges use an independent configuration for each function. Specifically, water purifiers typically connect multiple independent cylindrical filter cartridges in series along the water flow direction. Each cartridge is installed in its own independent filter bottle or housing and interconnected via pipes and quick-connect fittings to form a complete filtration path. For example, in common three- or five-stage water filtration systems, the pre-filter (PP cotton), pre-activated carbon, reverse osmosis or ultrafiltration membrane, and post-activated carbon filters are arranged and installed inside the water purifier in independent filter bottles. Each cartridge has its own inlet and outlet and is connected in series via PE pipes and quick-connect fittings.

[0004] However, the existing independent filter cartridge structure still has many shortcomings in practical use. First, because each filter cartridge is independently set up and connected in series through pipelines, the number of internal pipelines and joints is large, increasing the risk of leakage. Furthermore, the need to reserve space between each filter cartridge for disassembly and assembly results in a large overall size of the water purifier, making installation and maintenance inconvenient, especially in limited installation spaces. Second, most existing pre-filter cartridges use a single-layer PP cotton or single-layer pleated filter screen structure, which has limited filtration accuracy and dirt-holding capacity. In addition, existing filter cartridges are not easy to disassemble and assemble, making it difficult to effectively remove scale, increasing the load on subsequent fine filters and shortening the lifespan of the entire water purification system. Therefore, how to simplify the filter cartridge structure, reduce filter cartridge replacement costs, extend filter cartridge lifespan, improve pre-descaling, and reduce the overall space occupied by the machine while ensuring filtration accuracy has become an urgent technical problem to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned deficiencies and provide a green and environmentally friendly multifunctional combined filter element. By using a combined filter element arranged axially, this invention solves the technical problems in the prior art of reducing the manufacturing cost of filter elements through the arrangement of multifunctional combined filter elements, and facilitating the disassembly and replacement of filter elements through the combined arrangement, thereby improving the descaling and filtration capacity and the service life of filter elements. At the same time, it achieves efficient purification of water resources and economical utilization of filter element materials, reducing the environmental pollution load of waste filter elements.

[0006] The objective of this invention is achieved through the following means:

[0007] A multifunctional combined filter element includes a first filter element, a second filter element, and a third filter element arranged along the axial direction, each filter element having an inlet end and an outlet end that are interconnected.

[0008] The water outlet end of the first filter body and the water inlet end of the second filter body are detachably paired and inserted together, and a detachable first filter cotton sheet is arranged between the first filter body and the second filter body.

[0009] The outlet end of the second filter body is detachably paired and inserted with the inlet end of the third filter body, and a detachable second filter cotton sheet is arranged between the second filter body and the third filter body.

[0010] The inlet end of the first filter body away from the second filter body is the inlet of the combined filter element. The outlet end of the third filter body away from the second filter body is provided with a mounting part for connecting the water purifier. The interior of the mounting part has an axially penetrating outlet.

[0011] The water to be filtered enters through the inlet and flows sequentially through the first filter body, the first filter cotton sheet, the second filter body, the second filter cotton sheet, and the third filter body before being discharged from the outlet.

[0012] Further as described above, the first filter body includes a first housing, a first cover, and a first filter material. The interior of the first housing has a first filter chamber, the inlet is connected to the first filter chamber, the first filter material is filled in the first filter chamber, the first cover is fitted into the outlet end of the first filter chamber, and the outer side of the first housing is provided with a mating part that matches the second filter body.

[0013] By setting a docking part on the first housing, it can be detachably paired and inserted with the second filter body, reducing the number of external pipes and joints, lowering the risk of water leakage, and making the combined filter element structure of the first and second filter bodies compact, reducing the space occupied by the whole machine. At the same time, the first filter material is filled in the first filter chamber and sealed by the first housing cover, which not only facilitates the independent replacement of the first filter material, but also effectively removes scale components at the water inlet, reducing the filtration load of subsequent filter bodies, thereby extending the overall service life of the combined filter element.

[0014] Furthermore, as described above, the first filter chamber is equipped with two opposing first screens, and a gap is left between the two opposing first screens for filling the first filter material.

[0015] The first filter material is stably confined within the gap between the two by the relatively set first mesh, preventing the first filter material from being lost with the water flow or clogging the downstream water passage, thus ensuring the stability of the scale inhibition filtration effect.

[0016] Furthermore, as described above, the first filter material is selected from at least one of the following: silicophosphate, sodium hexametaphosphate, sodium tripolyphosphate, FOF scale inhibitor, polyacrylate, and polymaleate.

[0017] Further as described above, the second filter body includes a hollow second shell, a second shell cover, and a second filter material. The second shell cover is installed inside the second shell, and the second shell cover creates a positioning part for installing the first filter body and a second filter chamber for filling the second filter material. The first shell is mated and inserted with the positioning part through a mating part.

[0018] The second housing is divided into a positioning part and a second filtration chamber by the second cover. The positioning part is paired with the docking part of the first filter body, which realizes the axial detachable connection between the first filter body and the second filter body. No external pipeline is required, the overall structure is more compact, and the space occupied by the filter element is reduced. In addition, the first filter body can be disassembled and replaced separately, which reduces the maintenance difficulty and replacement cost. At the same time, the second filter material in the second filtration chamber can perform deep filtration on the water treated by the first filter body.

[0019] Furthermore, as described above, the inner side of the second housing cover near the second filter chamber is provided with a second mesh for blocking the second filter material, which is composed of an ultrafiltration membrane or an RO reverse osmosis membrane.

[0020] The second screen can reliably confine the second filter media within the second filter chamber. The second filter media uses an ultrafiltration membrane or an RO reverse osmosis membrane, which can effectively trap tiny particles, colloids, and bacteria in the water. After being treated with scale inhibition by the first filter body, it can significantly reduce the risk of membrane fouling, further extend the service life of the second filter body, and improve the quality of the effluent.

[0021] Furthermore, as described above, the second housing is provided with a connecting portion at the end near the water outlet, and a first sealing ring is sleeved around the connecting portion.

[0022] A first sealing ring is fitted around the periphery of the connecting part. When the second filter body is inserted and connected to the third filter body through the connecting part, the first sealing ring can form a radial seal at the connection point, effectively preventing leakage at the interface and improving the sealing reliability of the multi-segment connection of the combined filter element.

[0023] Further as described above, the third filter body includes a third housing, a third cover, and a third filter material. The third cover is embedded inside the third housing, and the third cover creates an internal spacer within the third body to form an insertion part for mating with the connecting part and a third filter chamber for filling the third filter material. The second housing is mated and inserted with the insertion part through the connecting part.

[0024] The third housing is divided into an insertion section and a third filter chamber by the third cover, so that the connecting part of the second filter body can be directly paired with the insertion section for insertion. This achieves axially detachable series connection of the second and third filter bodies, simplifies the connection structure between filter elements, makes the overall appearance of the combined filter element more compact, and reduces external connecting parts. At the same time, the second and third filter bodies can be disassembled and replaced independently, which facilitates subsequent graded maintenance and filter media replacement.

[0025] Furthermore, in the above description, a fourth cover is embedded inside the third filter chamber near the water outlet, which is opposite to the third cover. The inner surfaces of the third cover and the fourth cover are connected to a third mesh, and the inner surface of the third mesh is connected to a third filter cotton sheet.

[0026] The third filter media can be effectively sealed in the third filter chamber by the relatively set third and fourth shell covers and the third mesh inside them, preventing the third filter media from being lost from the outlet with the water flow. At the same time, it ensures that the water to be filtered can pass through the third filter media layer evenly, so that the water and the third filter media can fully contact each other, thereby improving the treatment effect and stability.

[0027] Furthermore, the third filter material is selected from five or more filter materials chosen from KDF55, silver ion balls, dechlorination balls, silver ion sterilization balls, microcrystalline water purification balls, maifan stone, tourmaline, nano silver, small molecule energy balls, antibacterial particles, metasilicic acid mineralization materials, and selenium-enriched activation balls to form a composite filter element.

[0028] The third filter material is composed of a combination of multiple functional filter materials, which can simultaneously perform multiple purification and conditioning functions such as chlorine removal, antibacterial, mineralization, and activation at the end of the filtration process. This effectively improves the taste and quality of the water, meets the diverse healthy drinking water needs of users, and the combination of multiple filter materials makes this level of filter cartridge more comprehensive in function and longer in service life.

[0029] Furthermore, as described above, a second sealing ring is fitted around the periphery of the mounting portion.

[0030] A second sealing ring is installed around the installation part to provide a reliable seal when the combined filter element is connected to the water purifier through the installation part, preventing leakage at the water outlet and ensuring the sealing of the connection between the combined filter element and the whole water purifier.

[0031] The beneficial effects of this invention are as follows: It adopts a combined single-unit structure with axially paired insertion of the first, second, and third filter elements, replacing the traditional split structure of multiple independent filter element pipelines connected in series. This eliminates the complex external pipelines and multiple connection joints, effectively reducing the risk of leakage. Furthermore, it eliminates the need to reserve multiple disassembly and assembly spaces for multiple independent filter elements, significantly reducing the overall space occupied by the filter elements. The overall structure is compact, facilitating installation and maintenance within limited installation space. The combined structure of this invention significantly reduces the overall material usage and the number of external components in the filter elements, lowering energy and raw material consumption during production, embodying the green design concept of energy conservation and material saving.

[0032] The filter elements are detachable and interlocked via a docking structure, and the first and second filter pads are also detachable. This allows for independent disassembly and replacement of the first, second, and third filter elements, as well as each filter pad, based on actual usage. This enables tiered maintenance and allows for targeted replacement of individual failed or clogged filter elements or filter pads, effectively reducing overall filter replacement and subsequent maintenance costs. The modular, detachable design reduces the amount of solid waste generated during traditional disposable filter replacements, extending the overall lifespan of the filter and meeting environmental requirements for recycling and solid waste reduction. The segmented filtration structure with multiple filter elements and filter pads allows for progressive filtration, creating a multi-functional filtration system. The first filter element performs pre-filtration for descaling, effectively improving overall filtration accuracy, reducing the filtration load on the downstream fine filtration structure, and extending the lifespan of the combined filter element and the water purification system. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure in the first direction of this embodiment;

[0034] Figure 2 This is a schematic diagram of the overall structure in the second direction of this embodiment;

[0035] Figure 3 This is a cross-sectional view of this embodiment;

[0036] Figure 4 This is a structural breakdown diagram of this embodiment;

[0037] Figure 5 This is a schematic diagram of the structure of the first filter element in this embodiment;

[0038] Figure 6 This is a schematic diagram of the structure of the third filter element in this embodiment;

[0039] Figure 7 This is a schematic diagram of the structure of the second filter element in this embodiment;

[0040] Figure 8This is a schematic diagram of the structure of the second filter material, which is an RO reverse osmosis membrane, in this embodiment 2.

[0041] The reference numerals in the figure are as follows:

[0042] 100-First filter body, 101-First housing, 102-First housing cover, 103-First filter media, 104-First filter chamber, 105-First partition, 106-Connecting part, 107-Water inlet;

[0043] 200-Second filter body, 201-Second housing, 202-Second housing cover, 203-Second filter material, 204-Positioning part, 205-Second filter chamber, 206-Second partition, 207-Connecting part, 208-First sealing ring;

[0044] 300-Third filter element, 301-Third housing, 302-Third housing cover, 303-Third filter media, 303a-KDF55, 303b-Silver ion balls, 303c-Chronic acid removal balls, 303d-Silver ion sterilization balls, 303e-Microcrystalline water purification balls, 303f-Maifan stone, 303g-Tourmaline, 303h-Nano silver, 303i-Small molecule energy balls, 303j-Antibacterial granules, 303k-Metasilicate mineralized material, 303n-Selenium-enriched activation balls, 304-Installation part, 305-Third filter chamber, 306-Fourth housing cover, 307-Third partition, 308-Third filter cotton sheet, 309-Second sealing ring, 310-Outlet;

[0045] 400 - First filter cotton sheet;

[0046] 500 - Second filter cotton sheet. Detailed Implementation

[0047] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0048] To make the technical problem to be solved, the technical solution and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0049] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this scheme and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] Example 1

[0051] In this embodiment, refer to Figures 1-7 The specific implementation of the multifunctional combined filter element includes a first filter body 100, a second filter body 200 and a third filter body 300, each filter body having an inlet end and an outlet end that are interconnected.

[0052] The outlet end of the first filter body 100 and the inlet end of the second filter body 200 are detachably paired and inserted (exemplary such as snap-fit ​​connection, interference fit, threaded connection, etc.), and a detachable first filter cotton sheet 400 is disposed between the first filter body 100 and the second filter body 200.

[0053] The outlet end of the second filter body 200 is detachably paired with the inlet end of the third filter body 300 (exemplary such as snap-fit ​​connection, interference fit, threaded connection, etc.), and a detachable second filter cotton sheet 500 is disposed between the second filter body 200 and the third filter body 300.

[0054] The inlet end of the first filter body 100 away from the second filter body 200 is the inlet 107 of the combined filter element, and the outlet end of the third filter body 300 away from the second filter body 200 is provided with a mounting part for connecting the water purifier. The interior of the mounting part has an axially penetrating outlet 310.

[0055] The water to be filtered enters through the inlet 107 and flows sequentially through the first filter body 100, the first filter cotton sheet 400, the second filter body 200, the second filter cotton sheet 500, and the third filter body 300 before being discharged from the outlet 310.

[0056] Reference Figure 5 The first filter body 100 includes a first housing 101, a first cover 102, and a first filter material 103. The first housing 101 has a first filter chamber 104 inside, and the water inlet 107 is connected to the first filter chamber 104. The first filter material 103 is filled in the first filter chamber 104. The first cover 102 is fitted into the water outlet of the first filter chamber 104. The outer side of the first housing 101 is provided with a docking part 106 that matches the second filter body 200.

[0057] By providing a docking part 106 on the first housing 101, it can be detachably paired and inserted with the second filter body 200, reducing the number of external pipes and joints, lowering the risk of water leakage, and making the combined filter element structure of the first filter body 100 and the second filter body 200 compact, reducing the space occupied by the whole machine; at the same time, the first filter material 103 is filled in the first filter chamber 104 and sealed by the first housing cover 102, which not only facilitates the independent replacement of the first filter material 103, but also effectively removes scale components at the water inlet, reduces the filtration load of subsequent filter bodies, and thus extends the overall service life of the combined filter element.

[0058] The first filter chamber 104 is provided with two opposing first partitions 105, and a gap is left between the two opposing first partitions 105 for filling the first filter material 103.

[0059] The first filter material 103 is stably confined within the gap between the two by the relatively set first mesh 105, preventing the first filter material 103 from being lost with the water flow or blocking the downstream water passage, thus ensuring the stability of the scale inhibition filtration effect.

[0060] The first filter material 103 is selected from at least one filter material selected from silicophosphoric acid, sodium hexametaphosphate, sodium tripolyphosphate, FOF scale inhibitor, polyacrylate, polymaleate, and ASP.

[0061] Specifically, in this embodiment, the first filter material 103 is a FOF scale inhibitor. Compared with traditional phosphorus-containing scale inhibitors, FOF scale inhibitors have the following significant characteristics: First, they do not contain phosphorus and will not release phosphates into the water, thus avoiding the eutrophication problem caused by phosphorus emissions and being more environmentally friendly; Second, their scale inhibition performance is stable and long-lasting, the material itself has an extremely low consumption rate, and a long service life; Third, they do not undergo chemical dissolution, but only induce crystallization through physical interface action, without changing the chemical composition of the water or increasing the sodium ion content in the water, making them particularly suitable for the drinking water needs of people sensitive to sodium intake.

[0062] FOF scale inhibitor is used as the scale-inhibiting filter media in the first filter element 100, and is stably filled in the first filter chamber 104 in conjunction with the correspondingly arranged first mesh 105. After the filtered water enters the combined filter element, it first comes into full contact with the FOF scale inhibitor. Scale-forming ions such as calcium and magnesium in the water are pre-induced to crystallize on the surface of the FOF material, thereby effectively inhibiting the deposition and scaling of sparingly soluble salts such as calcium carbonate and calcium sulfate on the surface of the ultrafiltration membrane or RO reverse osmosis membrane in the subsequent second filter element 200. This significantly reduces the risk of scaling of the subsequent precision filter membrane, delays membrane flux decline, reduces the frequency of chemical cleaning of the membrane, and extends the effective service life of the second filter element 200. At the same time, because the FOF scale inhibitor itself does not dissolve or consume beneficial minerals in the water, it can retain some natural mineral components in the water while effectively inhibiting scale, so that the water entering the subsequent filter elements still maintains a good mineralization foundation while the total hardness is moderately reduced. In addition, FOF scale inhibitor itself does not contain phosphorus and is insoluble in water. As a scale inhibitor material for water treatment, it avoids the risk of eutrophication caused to water bodies after the discharge of traditional phosphorus-containing scale inhibitors. It is an environmentally friendly water treatment material that is in line with the application trend of green and environmentally friendly materials.

[0063] It is worth noting that FOF scale inhibitors are a conventional technical means for purifying filter elements in this field, and will not be elaborated on here.

[0064] Reference Figure 7The second filter body 200 includes a hollow second shell 201, a second shell cover 202, and a second filter material 203. The second shell cover 202 is installed inside the second shell 201. The second shell cover 202 makes the interior of the second shell 201 spaced to form a positioning part 204 for installing the first filter body 100 and a second filter chamber 205 for filling the second filter material 203. The first shell 101 is mated and inserted with the positioning part 204 through a mating part 106.

[0065] The second housing 201 is divided into a positioning part 204 and a second filter chamber 205 by the second cover 202. The positioning part 204 is paired with the docking part 106 of the first filter body 100, realizing the axial detachable connection between the first filter body 100 and the second filter body 200. No external pipeline is required, the overall structure is more compact, and the space occupied by the filter element is reduced. Furthermore, the first filter body 100 can be disassembled and replaced separately, reducing the maintenance difficulty and replacement cost. At the same time, the second filter material 203 in the second filter chamber 205 can perform deep filtration on the water treated by the first filter body 100.

[0066] The inner side of the second cover 202 near the second filter chamber 205 is provided with a second mesh 206 for blocking the second filter material 203, which is composed of an ultrafiltration membrane.

[0067] The second screen 206 can reliably confine the second filter material 203 within the second filter chamber 205. The second filter material 203 uses an ultrafiltration membrane, which can effectively trap tiny particles, colloids and bacteria in the water. After being treated by the scale inhibition of the first filter body 100, it can significantly reduce the risk of membrane fouling, further extend the service life of the second filter body 200 and improve the quality of the effluent.

[0068] Ultrafiltration membranes are polymeric separation membranes driven by pressure difference. Their filtration precision falls between microfiltration and nanofiltration, with a pore size typically ranging from 0.01 micrometers to 0.1 micrometers. Ultrafiltration membranes often employ a hollow fiber membrane structure, with the membrane fiber walls densely covered with tiny filtration pores. Under pressure, the water to be filtered flows from the outside of the membrane fiber to the inside or from the inside to the outside, forming a cross-flow filtration or dead-end filtration mode. When the water to be filtered flows through the surface of the ultrafiltration membrane, suspended solids, colloids, silt, rust, large organic molecules, bacteria, and some viruses with diameters larger than the membrane pores are trapped on the outside of the membrane wall, while water molecules, dissolved inorganic salts, and small organic molecules pass smoothly through the membrane pores into the product water side.

[0069] Using an ultrafiltration membrane as the second filter media 203, it works in conjunction with the scale-inhibiting filter media and the first filter cotton sheet 400 filling the first filter body 100 to form a tiered filtration logic: the first filter body 100 uses the scale-inhibiting filter media to chelate calcium and magnesium ions in the water, inhibiting scale formation; the first filter cotton sheet 400 pre-intercepts larger suspended particles in the water; after the aforementioned pretreatment, the water flows into the second filter body 200, where the ultrafiltration membrane further intercepts tiny particles, colloids, and bacteria. This significantly reduces the workload of the ultrafiltration membrane, greatly reduces the risk of scaling and clogging on the membrane surface, slows down the rate of membrane flux decay, and thus extends the service life of the ultrafiltration membrane. Simultaneously, the high-precision interception capability of the ultrafiltration membrane effectively ensures the safety of the effluent in terms of microbiological indicators and turbidity, providing a clean base water quality for the subsequent mineralization and activation functional filter media in the third filter body 300. This ensures that the final effluent retains beneficial natural minerals while eliminating pathogenic microorganisms and fine impurities, improving the hygienic quality and drinking taste of the effluent.

[0070] The second housing 201 has a connecting part 207 at the end near the water outlet, and a first sealing ring 208 is sleeved around the connecting part 207.

[0071] A first sealing ring 208 is fitted around the outer periphery of the connecting part 207. When the second filter body 200 is inserted and connected to the third filter body 300 through the connecting part 207, the first sealing ring 208 can form a radial seal at the connection point, effectively preventing leakage at the interface and improving the sealing reliability of the multi-segment connection of the combined filter element.

[0072] Specifically, in this embodiment, two first sealing rings 208 are provided.

[0073] Reference Figure 6 The third filter body 300 includes a third housing 301, a third housing cover 302, and a third filter material 303. The third housing cover 302 is embedded inside the third housing 301. The third housing cover 302 makes the interior of the third body spaced to form an insertion part 304 for mating with the connecting part 207 and a third filter chamber 305 for filling the third filter material 303. The second housing 201 is mated and inserted with the insertion part 304 through the connecting part 207.

[0074] The third housing 301 is divided into an insertion part 304 and a third filter chamber 305 by the third housing cover 302, so that the connecting part 207 of the second filter body 200 can be directly inserted into the insertion part 304, realizing the axial detachable series connection of the second filter body 200 and the third filter body 300. This simplifies the connection structure between the filter elements, makes the overall appearance of the combined filter element more compact, and reduces the number of external connecting parts. At the same time, the second filter body 200 and the third filter body 300 can be disassembled and replaced independently, which facilitates the subsequent graded maintenance and filter media replacement.

[0075] Specifically, the first filter element 100, the second filter element 200, and the third filter element 300 are paired and inserted through an interference fit of concave and convex structures to form a single filter element.

[0076] The third filter chamber 305 is fitted with a fourth cover 306 that is opposite to the third cover 302 inside the outlet 310. The inner surfaces of the third cover 302 and the fourth cover 306 are connected to a third mesh 307, and the inner surface of the third mesh 307 is connected to a third filter cotton sheet 308.

[0077] Specifically, the third cover 302 and the fourth cover 306 are arranged opposite to each other in the third filter chamber 305. There are two third meshes 307 and two third filter cotton sheets 308. The two third meshes 307 are respectively installed on the inner side of the third cover 302 and the fourth cover 306, and the two third filter cotton sheets 308 are respectively connected to the inner side of the two third meshes 307.

[0078] The third filter material 303 can be effectively sealed in the third filter chamber 305 by the relatively arranged third cover 302 and fourth cover 306 and the third partition 307 inside them, preventing the third filter material 303 from being lost from the outlet 310 with the water flow. At the same time, it ensures that the water to be filtered can pass through the third filter material 303 layer evenly, so that the water and the third filter material 303 can be in full contact, thereby improving the treatment effect and stability.

[0079] Specifically, in this embodiment, the first filter cotton sheet 400, the second filter cotton sheet 500, and the third filter cotton sheet 308 are all made of washable PP cotton sheets to facilitate the periodic disassembly and replacement or periodic cleaning of the combined filter element.

[0080] Specifically, in this embodiment, the first partition 105, the second partition 206, and the third partition 307 are all made of food-grade 304 high-precision 200-mesh steel mesh. The first partition 105, the second partition 206, and the third partition 307 are fixed by insert injection molding, ultrasonic welding, or hot-melt welding. The specific connection process is a conventional technique for those skilled in the art and will not be described in detail here.

[0081] In some embodiments, the third filter material 303 is selected from a combination of five or more filter materials, including KDF55303a, silver ion balls 303b, dechlorination balls 303c, silver ion bactericidal balls 303d, microcrystalline water purification balls 303e, maifan stone 303f, tourmaline 303g, nano silver 303h, small molecule energy balls 303i, antibacterial particles 303j, metasilicic acid mineralization material 303k, and selenium-rich activation balls 303n, to form a composite filter element.

[0082] The third filter material 303 is composed of a combination of multiple functional filter materials, which can simultaneously perform multiple purification and conditioning functions such as dechlorination, antibacterial, mineralization, and activation at the end of the filtration process. It effectively improves the taste and quality of the water, achieves green purification and healthy activation of water quality, meets the diverse healthy drinking water needs of users, and the combination of multiple filter materials makes this level of filter cartridge more comprehensive in function and longer in service life.

[0083] Specifically, in this embodiment, the third filter material 303 is arranged from top to bottom as follows: food-grade KDF55303a, silver ion balls 303b, dechlorination balls 303c, silver ion sterilization balls 303d, microcrystalline water purification balls 303e, maifan stone 303f, tourmaline 303g, nano silver 303h, small molecule energy balls 303i, antibacterial particles 303j, metasilicic acid mineralization material 303k, and selenium-rich activation balls 303n. That is, the third filter material 303 includes 12 kinds of filter materials.

[0084] KDF55303a is a high-purity copper-zinc alloy filter media. Its working principle is based on an electrochemical oxidation-reduction reaction. When water flows through KDF55303a, a tiny galvanic cell is formed between the copper and zinc. Through electron transfer, the residual chlorine in the water is converted into harmless chloride ions. At the same time, it effectively inhibits bacterial growth and adsorbs and replaces heavy metal ions such as lead and mercury in the water, reducing the content of harmful substances.

[0085] Silver ion balls 303b can slowly release biologically active silver ions into water. These silver ions can adsorb onto the cell membrane surface of bacteria, disrupting their protein structure and respiratory enzyme systems, thus rendering the bacteria inactive and achieving a long-lasting antibacterial effect, preventing secondary bacterial growth in the purified water during storage.

[0086] The main components of the chlorine removal ball 303c are calcium sulfite and other chlorine removal materials. It has a well-developed porous structure, enabling it to chemically adsorb and reduce free residual chlorine in water, rapidly converting hypochlorous acid and hypochlorite ions into harmless chloride ions. This effectively removes residual chlorine and its irritating odor from the water, improving the taste of the water outlet.

[0087] The silver ion bactericidal ball 303d is made of silver-loaded antibacterial material, which can continuously release silver ions when in contact with water flow. The strong bactericidal effect of silver ions kills bacteria, fungi and other microorganisms in the water. It works synergistically with the aforementioned silver ion ball 303b to enhance the overall antibacterial and bactericidal effect and ensure the hygiene and safety of the discharged water.

[0088] The 303e microcrystalline water purifier ball is made from natural microcrystalline materials using a special process. Its surface and interior are rich in micropores, giving it excellent adsorption properties. When water flows through the microcrystalline stone, tiny suspended solids, colloids, and other impurities are adsorbed and intercepted, further improving the clarity of the effluent. Simultaneously, the microcrystalline stone can slowly dissolve some beneficial trace elements, playing a certain role in mineralization.

[0089] Maifan stone 303f is a natural silicate mineral with a porous, sponge-like structure and strong adsorption capacity. Maifan stone 303f can effectively adsorb residual chlorine, organic matter, and some heavy metal ions in water. It also contains various beneficial minerals such as potassium, sodium, calcium, magnesium, silicon, and zinc, which can slowly dissolve in water, mimicking the formation process of natural mineral water to mineralize and condition the water, thus improving its taste.

[0090] Tourmaline 303g is a natural mineral with a permanent spontaneous polarization effect. At room temperature, microcurrents can be generated at both ends of tourmaline 303g crystals, causing micro-electrolysis of water molecules and promoting the splitting of large water molecule clusters into smaller clusters. At the same time, tourmaline 303g can dissolve beneficial trace minerals into the water, activating the water quality and making the water taste sweeter and smoother.

[0091] Nano-silver 303h possesses extremely high specific surface area and surface activity, enabling it to efficiently release silver ions and exhibit strong inhibitory and bactericidal effects against a variety of bacteria, fungi, and viruses. When used in conjunction with other antibacterial filter media, nano-silver 303h further enhances the terminal antibacterial capability of the third filter element 300, playing a supplementary role in the removal of small pathogenic microorganisms.

[0092] Small molecule energy balls 303i are typically made of natural rare earth elements and far-infrared ceramic materials. They emit far-infrared rays, which resonate with the water molecules flowing through them, causing the hydrogen bonds in the water molecule clusters to break and recombine, forming smaller, more easily absorbed water molecule clusters. This enhances the permeability and activity of the water, thereby producing a positive conditioning effect on the sensory quality and physiological function of drinking water.

[0093] Antibacterial granules 303j are a specialized composite antibacterial material that disrupts the cell structure of microorganisms through a synergistic approach of physical adsorption and chemical action, exhibiting broad-spectrum antibacterial activity. Placing antibacterial granules 303j at the end of the combined filter cartridge further inhibits the growth of residual microorganisms in the filtered water, preventing bacterial growth in the outlet pipes or storage containers and extending the freshness time of the water.

[0094] Metasilicic acid mineralizing material 303k can continuously dissolve metasilicic acid into water. Metasilicic acid is an important indicator mineral component in natural mineral water, possessing excellent biological activity. Long-term consumption of water rich in metasilicic acid is beneficial to human health. This mineralizing material can enrich the effluent with metasilicic acid, improving the nutritional value and drinking quality of the water.

[0095] The Selenium-Enriched Activated Ball 303n is made from processed selenium-containing natural minerals and slowly releases selenium under continuous water flow. Selenium is one of the essential trace elements for the human body, possessing important physiological functions such as anti-oxidation. The Selenium-Enriched Activated Ball 303n enriches the output water with an appropriate amount of selenium, enhancing its health conditioning function and further enriching the nutritional mineral composition of the output water.

[0096] It is worth further explaining that using the above-mentioned filter materials as filter elements in water purifiers is a conventional technical approach in this field. The specific usage principles and structures are readily available to those skilled in the art and will not be elaborated upon here.

[0097] A second sealing ring 309 is fitted around the periphery of the mounting part.

[0098] A second sealing ring 309 is provided around the installation part to provide a reliable seal when the combined filter element is connected to the water purifier through the installation part, preventing leakage at the outlet 310 and ensuring the sealing of the connection between the combined filter element and the whole water purifier.

[0099] Specifically, the mounting part of the combined filter element is connected to the inside of the water purifier. After the water source enters through the inlet 107, the water to be filtered can pass through the first filter body 100, the first filter cotton sheet 400, the second filter body 200, the second filter cotton sheet 500 and the third filter body 300 in sequence, and be discharged from the outlet 310.

[0100] The specific filtering process in this embodiment is as follows:

[0101] This filter element employs a single-unit combined structure with axially paired and inserted first filter element 100, second filter element 200, and third filter element 300. A first filter cotton sheet 400 is placed between the first filter element 100 and the second filter element 200, and a second filter cotton sheet 500 is placed between the second filter element 200 and the third filter element 300. Two opposing third filter cotton sheets 308 are placed within the third filter chamber 305 of the third filter element 300. The first filter element 100, second filter element 200, and third filter element 300 are axially paired and inserted to form a single-unit combined filter element. Multiple stages of filter media are placed within the corresponding filter elements to achieve the corresponding filtration functions. This replaces the traditional split structure of multiple independent filter elements connected in series, significantly reducing the overall space occupied by the filter element. The overall structure is compact, facilitating installation and maintenance within limited installation space. The filter elements are detachably paired using a docking structure. The filter media is designed for insertion, and the first filter element 400 and the second filter element 500 are detachable. This allows the first filter element 100, the second filter element 200, the third filter element 300, and each filter element to be independently disassembled and replaced according to actual usage. This enables tiered maintenance and allows for targeted replacement of individual failed or clogged filter elements or filter elements, effectively reducing the overall replacement cost and subsequent maintenance cost of the filter element. The segmented filtration structure with multiple filter elements and filter elements allows for progressive filtration, resulting in a multi-functional filtration effect. The first filter material 103 uses scale inhibitors (such as FOF scale inhibitors) for pre-scale removal filtration, and the detachable filter elements (such as PP filter elements) between the filter elements facilitate replacement or cleaning based on usage time, effectively improving overall filtration accuracy, reducing the filtration load on the downstream fine filtration structure, and extending the service life of the combined filter element and the water purification system.

[0102] Example 2

[0103] In this embodiment, refer to Figure 8 The difference between this second embodiment and the first embodiment is that the second filter material 203 is composed of an RO reverse osmosis membrane, which includes a multilayer membrane mesh, a filter membrane and a screen.

[0104] The filter membrane is a reverse osmosis membrane with semi-permeable properties and a pore size at the nanometer level. When the pressure applied on the inlet side is greater than the osmotic pressure, only water molecules and a very small amount of dissolved gas are allowed to pass through, while inorganic salts, heavy metal ions, organic matter, bacteria and viruses in the water are effectively intercepted and discharged with the concentrated water, thereby achieving high-precision desalination and purification.

[0105] Multi-layer membrane mesh and screens are combined and arranged on both sides of the filter membrane or between the membrane layers. The screens mainly serve a supporting function, providing rigid support for the filter membrane and preventing it from breaking or collapsing under large pressure differentials. The multi-layer membrane mesh forms an orderly flow channel, ensuring that the incoming water flow is evenly distributed across the entire filter membrane surface, reducing concentration polarization effects, and simultaneously providing physical isolation and protection for the filter membrane, avoiding direct friction between the membrane layers. This combined structure enhances the overall structural strength and operational stability of the RO reverse osmosis membrane, extending its service life.

[0106] The RO reverse osmosis membrane is used as the second filter media 203, working in conjunction with the scale-inhibiting filter media filled in the first filter body 100. The water to be filtered first passes through the first filter body 100, where the scale-inhibiting filter media, through chelation, stably disperses scale-forming ions such as calcium and magnesium in the water, inhibiting the crystallization and deposition of sparingly soluble salts on the surface of the RO reverse osmosis membrane. This effectively slows down membrane scaling, reducing membrane cleaning frequency and replacement costs. Simultaneously, the first filter cotton sheet 400, positioned between the first filter body 100 and the second filter body 200, pre-intercepts suspended particulate matter and larger-diameter impurities in the water, preventing them from directly impacting or clogging the RO reverse osmosis membrane, further protecting the RO reverse osmosis membrane and ensuring long-term stability of deep filtration performance.

[0107] It should be noted that using RO reverse osmosis membranes as filter material in water purifiers is a conventional technique in this field, and its specific operating principles and structure are readily available to those skilled in the art, and will not be elaborated upon here.

[0108] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present invention without departing from the scope of the present invention are within the scope of the present invention.

Claims

1. A multifunctional combined filter element, characterized in that, It includes a first filter body, a second filter body, and a third filter body arranged along the axial direction, each filter body having an inlet end and an outlet end that are interconnected. The water outlet end of the first filter body and the water inlet end of the second filter body are detachably paired and inserted together, and a detachable first filter cotton sheet is arranged between the first filter body and the second filter body. The outlet end of the second filter body is detachably paired and inserted with the inlet end of the third filter body, and a detachable second filter cotton sheet is arranged between the second filter body and the third filter body. The inlet end of the first filter body away from the second filter body is the inlet of the combined filter element. The outlet end of the third filter body away from the second filter body is provided with a mounting part for connecting the water purifier. The interior of the mounting part has an axially penetrating outlet. The first filter body includes a first housing, a first cover disposed inside the first housing, and a first filter material. The interior of the first housing has a first filter chamber, and the exterior of the first housing is provided with a docking part that matches the second filter body. The first filter chamber is provided with a first partition mesh disposed opposite to it. The second filter element includes a hollow second shell, a second shell cover disposed inside the second shell, and a second filter material. The second shell has a positioning part for mating with the docking part. The first shell is inserted into the positioning part through the docking part. The inner side of the second shell cover is provided with a second mesh for blocking the second filter material. The third filter body includes a third housing, a third housing cover disposed inside the third housing, and a third filter material. The interior of the third housing is provided with an insertion part for mating with the connecting part. The second housing is mated and inserted with the insertion part through the connecting part. The water to be filtered enters through the inlet and flows sequentially through the first filter body, the first filter cotton sheet, the second filter body, the second filter cotton sheet, and the third filter body before being discharged from the outlet.

2. The multifunctional combined filter element according to claim 1, characterized in that: The inlet is connected to the first filter chamber, the first filter material is filled in the first filter chamber, the first cover is installed in the outlet of the first filter chamber, and a gap is left between the two oppositely arranged first partitions for filling the first filter material.

3. The multifunctional combined filter element according to claim 1, characterized in that: The first housing, the second housing, and the third housing can be connected by snap-fit ​​or threaded connection.

4. A multifunctional combined filter element according to claim 2, characterized in that: The first filter material is selected from at least one of the following: silicophosphate, sodium hexametaphosphate, sodium tripolyphosphate, FOF scale inhibitor, polyacrylate, and polymaleate.

5. A multifunctional combined filter element according to claim 1, characterized in that: The second cover is fitted inside the second housing, and the second cover makes the interior of the second housing spaced to form a positioning part for fitting the first filter body and a second filter chamber for filling the second filter material.

6. A multifunctional combined filter element according to claim 5, characterized in that: The second filter material is composed of an ultrafiltration membrane or an RO reverse osmosis membrane.

7. A multifunctional combined filter element according to claim 5, characterized in that: A first sealing ring is fitted around the periphery of the connecting part.

8. A multifunctional combined filter element according to claim 1, characterized in that: The third cover is fitted inside the third housing, and the third cover makes the interior of the third object spaced to form an insertion part for mating the connection part and a third filter chamber for filling the third filter material.

9. A multifunctional combined filter element according to claim 8, characterized in that: The third filter chamber is fitted with a fourth cover that is opposite to the third cover inside the water outlet. The inner surfaces of the third cover and the fourth cover are connected to a third mesh, and the inner surfaces of the third mesh are connected to a third filter cotton sheet.

10. A multifunctional combined filter element according to any one of claims 1-9, characterized in that: The third filter material is selected from five or more filter materials, including KDF55, silver ion balls, dechlorination balls, silver ion sterilization balls, microcrystalline stone water purification balls, maifan stone, tourmaline, nano silver, small molecule energy balls, antibacterial particles, metasilicic acid mineralization materials, and selenium-enriched activation balls, to form a composite filter element.

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