Water purification filter element for water purification equipment and water purification equipment
By using nanocomposite membranes to intercept bacteria in water purification equipment, the risk of harmful substances leaching out due to the addition of antibacterial agents or modified nonwoven fabrics to post-filter cartridges is eliminated, achieving higher filtration accuracy and drinking water safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-03-31
AI Technical Summary
Adding antibacterial agents or using modified non-woven materials to the post-activated carbon filter cartridges in existing water purification equipment increases the risk of harmful substances leaching out, affecting drinking water safety.
Using a nanocomposite membrane as the water purification filter element, the nanofiber membrane is formed by interlacing and is located downstream of the post-filter element. It physically intercepts the invasion of bacteria and avoids the addition of chemical substances.
It improves the quality of water output from water purification equipment, reduces the risk of harmful substances leaching out, and enhances the safety of drinking water for users.
Smart Images
Figure CN224062596U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water purification equipment technology, specifically providing a water purification filter element and water purification equipment for use in water purification equipment. Background Technology
[0002] With the improvement of modern living standards, people are paying increasing attention to the safety of drinking water. As a highly efficient water treatment device, reverse osmosis water purifiers are widely used in homes and public places. Tap water flows out of the tap after passing through multiple filters, including a pre-filter, a reverse osmosis membrane, and a post-activated carbon filter. The reverse osmosis membrane can filter out harmful substances such as bacteria, viruses, heavy metal ions, and organic matter from the water, providing users with safe and pure drinking water.
[0003] However, during long-term use, due to the contact between the faucet and the external environment, bacteria and microorganisms in the air may enter the water purification system through the end of the faucet, leading to an increase in the bacterial content in the post-activated carbon filter, reducing the quality of the output water, and affecting the user's health.
[0004] Currently, common methods involve adding antibacterial agents to post-activated carbon filters or using quaternary ammonium salt-modified nonwoven fabric as filter material to inhibit bacterial growth. However, both methods introduce new chemical substances into the filter, increasing the risk of harmful substances leaching into the water and affecting drinking water safety. For example, when using inorganic antibacterial agents like silver or zinc-based agents, improper control of the agent content can lead to poor antibacterial effects or excessive levels of silver, zinc, and other metals in the effluent, impacting human health. Similarly, when using organic quaternary ammonium salt-modified nonwoven fabric for antibacterial purposes, the organic quaternary ammonium salt readily reacts with sodium hypochlorite in the soaking solution, generating harmful substances such as chloroform, which also affects human health.
[0005] Accordingly, there is a need in the field for a new water purification filter cartridge and water purification equipment to solve the above problems. Utility Model Content
[0006] The present invention aims to solve the above-mentioned technical problems, namely, the problems that add antibacterial agents to the post-activated carbon filter cartridge or use non-woven fabric modified with quaternary ammonium salt as filter cartridge material to inhibit bacterial growth. These methods all add new chemical substances to the filter cartridge, which increases the risk of harmful substances leaching into the water and affects the user's drinking water safety.
[0007] In a first aspect, this utility model provides a water purification filter element for a water purification device; the water purification device includes a post-filter element and a water purification filter element, and the water purification filter element is located downstream of the post-filter element along the water flow direction;
[0008] The water purification filter element includes a filter element body, and the filter element body includes a nanocomposite membrane, which is enclosed to form a ring or any polygon.
[0009] The nanocomposite membrane comprises at least two layers of nanofiber membranes stacked together, wherein the nanofiber membranes comprise interlaced nanofibers.
[0010] With the above technical solution, the water purification filter cartridge is located downstream of the post-filter cartridge along the water flow direction. The filter cartridge includes a nanocomposite membrane, which comprises a nanofiber membrane. The nanofiber membrane is formed by interlacing nanofibers, possessing high filtration precision and effectively intercepting bacteria. Furthermore, the nanocomposite membrane includes at least two stacked nanofiber membranes, further enhancing its bacterial interception effect and reducing the likelihood of bacteria intruding into the post-filter cartridge. Compared to adding antibacterial agents to the post-filter cartridge or using quaternary ammonium salt-modified nonwoven fabric as the filter material, the water purification filter cartridge in this application uses physical interception to prevent bacteria from intruding into the post-filter cartridge. This eliminates the need for chemical additives, reduces the risk of harmful substances leaching into the water, improves the quality of the water from the purification equipment, and enhances the user's drinking water safety.
[0011] In the preferred embodiment of the above-mentioned water purification filter element, the nanocomposite membrane is wound into a ring shape;
[0012] The nanocomposite film is folded to form a ring.
[0013] When using the above technical solution, the nanocomposite membrane, wound into a ring shape, can intercept bacteria and facilitates the cleaning and regeneration of the water filter cartridge. The folding and ring-shaped arrangement of the nanocomposite membrane increases the filtration area and improves the bacterial interception effect.
[0014] In the preferred embodiment of the above-mentioned water purification filter element, the diameter of the fiber is 10-100 nanometers; and / or
[0015] The thickness of the nanofiber membrane is 20-200 micrometers.
[0016] When using the above technical solution, the smaller the diameter of the fibers, the higher the filtration precision of the nanofiber membrane formed by the interlacing, and the better the interception effect against bacteria. By adjusting the thickness of the nanofiber membrane, the filtration effect of the nanofiber membrane can be improved while ensuring its water permeability.
[0017] In the preferred embodiment of the above-mentioned water purification filter element, the nanocomposite membrane further includes a support layer, which is stacked on the inner side, outer side or between two adjacent nanofiber membranes.
[0018] By adopting the above technical solution, the strength of the nanocomposite membrane can be improved through the support layer, thus extending the service life of the water purification filter element.
[0019] In the preferred embodiment of the above-mentioned water purification filter cartridge, the nanocomposite membrane further includes at least two support layers, which are stacked on the inner and outer sides of the nanofiber membrane.
[0020] The support layer and the nanofiber membrane are stacked and interleaved.
[0021] By adopting the above technical solution, the strength of the nanocomposite membrane can be improved through the support layer, thus extending the service life of the water purification filter element.
[0022] In the preferred embodiment of the above-mentioned water purification filter element, the support layer includes a non-woven fabric layer.
[0023] When the above technical solution is adopted, the nonwoven fabric layer can support the nanofiber layer, and the manufacturing method is simple and the cost is low.
[0024] In the preferred embodiment of the above-mentioned water purification filter element, the filter element body further includes a support frame, and the nanocomposite membrane is fitted onto the outside of the support frame.
[0025] By adopting the above technical solution, the nanocomposite membrane is supported by a support frame, which enables the nanocomposite membrane to filter water more stably, improves the filtration and bacterial interception effects, and can also extend the life of the water purification filter cartridge.
[0026] In the preferred embodiment of the above-mentioned water purification filter element, the filter element body further includes a second carbon rod, and the nanocomposite membrane is fitted onto the outside of the second carbon rod. The water inlet of the water purification filter element first flows through the second carbon rod and then through the nanocomposite membrane; or
[0027] The second carbon rod is fitted onto the outside of the nanocomposite membrane. The water inlet of the water filter cartridge first flows through the second carbon rod and then through the nanocomposite membrane.
[0028] When the above technical solution is adopted, the nanocomposite membrane is fitted over the second carbon rod, or the second carbon rod is fitted over the nanocomposite membrane. Inlet water first passes through the second carbon rod and then through the nanocomposite membrane. When water production stops, the nanocomposite membrane can prevent bacteria from entering the second carbon rod and the post-filter, reducing the possibility of bacterial growth within these areas, thereby improving the quality of the effluent and enhancing the user's drinking water safety.
[0029] Secondly, this utility model provides a water purification device; the water purification device includes a component disposed on a water line:
[0030] Post-filter;
[0031] Faucet;
[0032] As described above, the water purifier filter element is located between the post-filter element and the faucet.
[0033] By employing the above technical solution, the water purifier filter cartridge is independently placed between the post-filter cartridge and the faucet. This cartridge intercepts bacteria entering the water system via the faucet, reducing the likelihood of bacterial contamination of the post-filter cartridge. Furthermore, no chemicals need to be added to the filter cartridge, minimizing the risk of harmful substances leaching into the water, thereby improving the quality of the purifier's output water and enhancing the user's drinking water safety.
[0034] Thirdly, this utility model provides a water purification device; the water purification device includes a component disposed on a water line:
[0035] Post-filter;
[0036] The water purification filter element described above is configured in combination with the post-filter element.
[0037] With the above technical solution, the water purification filter and the post-filter are combined and positioned downstream of the post-filter along the water flow direction. The nanocomposite membrane prevents bacteria entering the water supply via the faucet from entering the post-filter, reducing the possibility of bacterial contamination. Furthermore, no chemicals need to be added to the post-filter, reducing the risk of harmful substances leaching into the water, thereby improving the water quality of the purifier and enhancing the user's drinking water safety.
[0038] In summary, this utility model has at least the following beneficial effects:
[0039] 1. Along the water flow direction, the water purification filter cartridge is located downstream of the post-filter cartridge. The filter cartridge includes a nanocomposite membrane, which comprises a nanofiber membrane. The nanofiber membrane is formed by the interlacing of nano-scale fibers, exhibiting high filtration precision and effectively intercepting bacteria. Furthermore, the nanocomposite membrane comprises at least two stacked nanofiber membranes, further enhancing its bacterial interception effect and reducing the likelihood of bacteria intruding into the post-filter cartridge. Compared to adding antibacterial agents or using quaternary ammonium salt-modified non-woven fabric as filter material in the post-filter cartridge, the water purification filter cartridge in this application employs physical interception to prevent bacterial intrusion, eliminating the need for chemical additives. This reduces the risk of harmful substances leaching into the water, improves the quality of the water from the purification equipment, and enhances the user's drinking water safety.
[0040] 2. The non-woven fabric layer can support the nanofiber layer, improve the strength of the nanocomposite membrane, and extend the service life of the water purification filter cartridge. Attached Figure Description
[0041] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:
[0042] Figure 1 This is a schematic diagram of the water purification device in Embodiment 1 of this utility model;
[0043] Figure 2 This is a cross-sectional view of the post-filter element (a nanocomposite membrane wound into a ring) in Embodiment 1 of this utility model;
[0044] Figure 3 This is a cross-sectional view of the post-filter element (the filter element body includes a second carbon rod and a nanocomposite membrane) in Embodiment 1 of this utility model;
[0045] Figure 4 This is a top view of the filter element body (a nanocomposite membrane folded into a ring) in Embodiment 1 of this utility model;
[0046] Figure 5 This is a schematic diagram of the water purification device in Embodiment 2 of this utility model;
[0047] Figure 6 This is a top view of the filter element body (a nanocomposite membrane folded into a ring) in Embodiment 2 of this utility model;
[0048] Figure label:
[0049] 1. Pre-filter; 2. Inlet valve; 3. Booster pump; 4. Reverse osmosis filter; 5. Check valve; 6. Concentrate solenoid valve; 7. Post-filter; 71. First carbon rod; 8. Water purification filter; 81. Filter body; 811. Nanocomposite membrane; 8111. Nanofiber membrane; 8112. Support layer; 812. Support frame; 813. Second carbon rod; 9. Faucet. Detailed Implementation
[0050] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.
[0051] It should be noted that in the description of this utility model, terms such as "upper," "lower," "left," and "right," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0052] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0053] Example 1
[0054] To address the issue of adding antibacterial agents to post-activated carbon filters or using non-woven fabric modified with quaternary ammonium salts as filter material to inhibit bacterial growth, new chemical substances have been added to the filters. This increases the risk of harmful substances leaching into the water, affecting the safety of users' drinking water.
[0055] like Figures 1 to 4 As shown, this embodiment discloses a water purification device, which is described using a water purifier as an example. The water purifier includes a pre-filter 1, an inlet valve 2, a booster pump 3, a reverse osmosis filter 4, a one-way valve 5, a post-filter 7, a purified water filter 8, and a faucet 9, which are sequentially arranged on the water circuit. The purified water filter 8 and the post-filter 7 are combined. The reverse osmosis filter 4 is also connected to a concentrate pipe, and a concentrate solenoid valve 6 is installed on the concentrate pipe.
[0056] During water purification, the inlet valve 2, booster pump 3, concentrated water solenoid valve 6, and faucet 9 are opened. Tap water undergoes preliminary filtration through pre-filter 1 and then enters reverse osmosis filter 4 under the action of booster pump 3. Reverse osmosis filter 4 removes harmful substances such as tiny particles, heavy metals, bacteria, and viruses from the water. The purified water from reverse osmosis filter 4 enters post-filter 7 through one-way valve 5. The purified water then flows sequentially through post-filter 7 and water purification filter 8 for further adsorption of odors and residual chlorine before flowing out through faucet 9 for drinking. When water purification is stopped, faucet 9, booster pump 3, and concentrated water solenoid valve 6 are closed. Water purification filter 8 also prevents bacteria from re-entering the water path through faucet 9, reducing the possibility of bacterial contamination of the purified water outlets of post-filter 7 and reverse osmosis filter 4, thereby improving the quality of the water purifier's output.
[0057] like Figure 1 and Figure 2 As shown, specifically, the post-filter 7 includes a housing and a first carbon rod 71. The first carbon rod 71 is installed inside the housing and is coaxially arranged with the housing. The housing is provided with a first water inlet and a second water inlet. The first water inlet is connected to the purified water outlet of the reverse osmosis filter 4 through a pipe, and the second water inlet is connected to the faucet 9 through a pipe.
[0058] The water purification filter cartridge 8 includes a filter cartridge body 81, which includes a nanocomposite membrane 811. The nanocomposite membrane 811 is arranged in a ring or any polygon, which can be a triangle, rectangle, or irregular polygon, and is fitted over the outside of the first carbon rod 71. In this embodiment, the first carbon rod 71 is cylindrical, and the nanocomposite membrane 811 is set as a ring that matches the shape of the first carbon rod 71 and is fitted over the outside of the first carbon rod 71. During water purification, purified water enters the housing through the first water inlet, flows through the first carbon rod 71 to remove odors and residual chlorine, and then flows through the nanocomposite membrane 811 before flowing out from the second water inlet. Of course, the first carbon rod 71 can also be fitted over the outside of the nanocomposite membrane 811. During water purification, the water entering the water purification filter cartridge 8 still flows through the first carbon rod 71 first and then through the nanocomposite membrane 811. Conversely, after water production is stopped, the nanocomposite membrane 811 can intercept bacteria that have entered the water path in reverse through the faucet 9, reducing the possibility of bacteria entering the purified water outlet of the first carbon rod 71 and the reverse osmosis filter 4, thereby improving the water quality of the water purifier.
[0059] like Figure 1 and Figure 3 As shown, the filter body 81 further includes a second carbon rod 813, which is cylindrical in shape matching the first carbon rod 71. The nanocomposite membrane 811 is annular in shape matching the second carbon rod 813. The second carbon rod 813 is fitted over the first carbon rod 72, and the nanocomposite membrane 811 is fitted over the second carbon rod 813. During water production, purified water enters the casing through the first inlet, flows through the first carbon rod 71 and the second carbon rod 813 to remove odors and residual chlorine, and then flows through the nanocomposite membrane 811 before exiting from the second inlet. Alternatively, the second carbon rod 813 can be fitted over the nanocomposite membrane 811, and the first carbon rod 71 can be fitted over the second carbon rod 813. During water production, the water entering the post-filter 7 still flows through the first carbon rod 71 and the second carbon rod 813 first, and then through the nanocomposite membrane 811. Conversely, after water production is stopped, the nanocomposite membrane 811 can intercept bacteria that have entered the water path in reverse through the faucet 9, reducing the possibility of bacteria entering the purified water outlet of the second carbon rod 813, the first carbon rod 71, and the reverse osmosis filter 4, thereby improving the water quality of the water purifier.
[0060] like Figure 2 As shown, the nanocomposite membrane 811 is wound into a ring and fitted on the outside of the first carbon rod 71, which can intercept bacteria and facilitate the cleaning and regeneration of the water purification filter element 8.
[0061] like Figure 4 As shown, in another preferred embodiment, the nanocomposite membrane 811 is folded into a ring and fitted over the outside of the first carbon rod 71. The folding method increases the filtration area and improves the interception effect on bacteria.
[0062] like Figure 3 As shown, the nanocomposite membrane 811 includes at least one support layer 8112 and at least two nanofiber membranes 8111 stacked together. The nanofiber membranes 8111 are formed by interlacing nanofibers, possessing high filtration accuracy and capable of intercepting bacteria. The at least two stacked nanofiber membranes 8111 further enhance the bacterial interception effect of the nanocomposite membrane 811, thereby reducing the possibility of bacteria invading the first carbon rod 71 and the second carbon rod 813. The raw material for the fibers is a high molecular polymer such as PVA (polyvinyl alcohol) or PLA (polylactic acid), which is formed into nanofibers through electrospinning technology. Preferably, the fiber diameter is 10-100 nanometers. The fibers are interlaced to form the nanofiber membrane 8111. Preferably, the thickness of the nanofiber membrane 8111 is 20-200 micrometers. The number of nanofiber membrane layers 8111 is determined based on the fiber diameter and the thickness of the nanofiber membrane 8111, enabling the nanofiber membrane 8111 to simultaneously possess high filtration accuracy and good water permeability.
[0063] When the support layer 8112 is a single layer, it is stacked on the inner side, outer side, or between two adjacent nanofiber membranes 8111. When the support layer 8112 is a double layer, one layer is stacked on the inner side of the nanofiber membrane 8111, and the other layer is stacked on the outer side. Alternatively, the support layers 8112 and nanofiber membranes 8111 can be staggered, or both layers can be stacked on the inner side, outer side, or between two adjacent nanofiber membranes 8111. When the support layer 8111 is multi-layered, the arrangement is the same as when the support layer 8112 is a double layer, except that the number of support layers 8112 can be arbitrarily set, such as three support layers stacked simultaneously on the outer side of the nanofiber membrane 8111. The support layer 8112 can improve the strength of the nanocomposite membrane 811 and extend the service life of the filter body 81.
[0064] The support layer 8112 includes a nonwoven fabric layer, which can be polypropylene spunbond nonwoven fabric or polyethylene terephthalate spunbond nonwoven fabric. The manufacturing method is simple and the cost is low, while providing good support for the nanofiber membrane 8111. In this embodiment, the support layer 8112 is set to one layer and located on the side of the nanofiber membrane 8111 facing away from the second carbon rod 813. While supporting the nanofiber membrane 8111, it can also perform coarse filtration of bacteria. Taking Escherichia coli as an example, filtration tests showed that the nanocomposite membrane 811 can reduce the concentration of E. coli from 2000 CFU / 100 mL to 3 CFU / 100 mL, with a removal rate as high as 99.85%, significantly reducing the risk of microbial contamination.
[0065] Compared to adding antibacterial agents to the post-filter cartridge 7 or using non-woven fabric modified with quaternary ammonium salts as filter material, the nanocomposite membrane 811 in this embodiment uses physical interception to prevent bacteria from invading the first carbon rod 71 and the second carbon rod 813. There is no need to add chemical substances to the first carbon rod 71 and the second carbon rod 813, which can reduce the risk of harmful substances precipitating in water, improve the water quality of the water purifier, and enhance the user's drinking water safety.
[0066] Example 2
[0067] like Figure 5 and 6 As shown, this embodiment discloses a water purifier, which includes a pre-filter 1, an inlet valve 2, a booster pump 3, a reverse osmosis filter 4, a one-way valve 5, a post-filter 7, a purified water filter 8, and a faucet 9 arranged sequentially on the water circuit. The purified water filter 8 and the post-filter 7 are arranged independently. The reverse osmosis filter 4 is also connected to a concentrate pipe, and a concentrate solenoid valve 6 is installed on the concentrate pipe.
[0068] During water purification, the inlet valve 2, booster pump 3, concentrated water solenoid valve 6, and faucet 9 are opened. Tap water undergoes preliminary filtration through pre-filter 1 and then enters reverse osmosis filter 4 under the action of booster pump 3. Reverse osmosis filter 4 removes harmful substances such as tiny particles, heavy metals, bacteria, and viruses from the water. The purified water from reverse osmosis filter 4 enters post-filter 7 through one-way valve 5. Post-filter 7 further adsorbs odors and residual chlorine before flowing through water purification filter 8 and faucet 9 for drinking. After water purification stops, faucet 9, booster pump 3, and concentrated water solenoid valve 6 are closed. Water purification filter 8 can also prevent bacteria from re-entering the water path through faucet 9, reducing the possibility of bacterial contamination of the purified water outlets of post-filter 7 and reverse osmosis filter 4, thereby improving the quality of the water purifier's output.
[0069] like Figure 5 and Figure 6 As shown, specifically, the water purification filter element 8 includes a housing and a filter element body 81. The housing has a third water inlet and a fourth water inlet. The third water inlet is connected to the outlet of the post-filter element 7 via a pipe, and the fourth water inlet is connected to the faucet 9 via a pipe. The filter element body 81 includes a support frame 812 and a nanocomposite membrane 811. The support frame 812 is installed inside the housing and is coaxially arranged with the housing. The nanocomposite membrane 811 is enclosed to form a ring or any polygon. The arbitrary polygon can be a triangle, rectangle, or irregular polygon, and is fitted over the support frame 812.
[0070] In this embodiment, the support frame 812 is cylindrical, and the nanocomposite membrane 811 is annular, matching the shape of the support frame 812, and is fitted onto the outside of the support frame 812. The support frame 812 supports the nanocomposite membrane 811, enabling it to filter water more stably, improving the filtration and bacteria interception effects, and extending the lifespan of the water filter cartridge 8. The nanocomposite membrane 811 in this embodiment is the same as that in Embodiment 1, and can also be formed into an annular shape by winding or folding, and fitted onto the outside of the support frame 812. The specific structure will not be described in detail here.
[0071] During water production, water enters the housing through the third inlet of the water purifier filter 8, flows through the support frame 812, then through the nanocomposite membrane 811, and exits through the fourth inlet. After water production stops, the nanocomposite membrane 811 can intercept bacteria that have entered the water path via the faucet 9, reducing the possibility of bacteria entering the purified water outlets of the post-filter 7 and reverse osmosis filter 4, thereby improving the water quality of the purifier. Furthermore, compared to adding antibacterial agents to the post-filter 7 or using non-woven fabric modified with quaternary ammonium salts as filter material, the water purifier filter 8 in this embodiment uses physical interception to prevent bacteria from entering the post-filter 7. This eliminates the need to add chemical substances to the post-filter 7, reducing the risk of harmful substances precipitating in the water, improving the water quality of the purifier, and enhancing the user's drinking water safety.
[0072] In addition, the water purification filter 8 in Embodiment 1 can also be combined with the pre-filter 1. In this embodiment, the water purification filter 8 can also be installed upstream and / or downstream of the pre-filter 1 to provide better water quality for the water purifier.
[0073] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.
Claims
1. A water purification filter cartridge for a water purification apparatus, characterized by, The water purification device comprises a post-filter (7) and a water purification filter (8), and the water purification filter (8) is located downstream of the post-filter (7) in the water flow direction. The water purification filter (8) comprises a filter body (81), and the filter body (81) comprises a nanocomposite membrane (811), and the nanocomposite membrane (811) is enclosed to form a ring shape or an arbitrary polygon. The nanocomposite membrane (811) comprises at least two layers of nanofiber membranes (8111) stacked together, and the nanofiber membranes (8111) comprise nanoscale fibers staggered and overlapped.
2. The water purification filter cartridge for a water purification apparatus according to claim 1, characterized by The nanocomposite membrane (811) is wound to form a ring shape; or The nanocomposite membrane (811) is folded to form a ring shape.
3. The water purification filter cartridge for a water purification apparatus according to claim 1, characterized by The diameter of the fiber is 10-100 nanometers; and / or The thickness of the nanofiber membrane (8111) is 20-200 microns.
4. The water purification filter cartridge for a water purification apparatus according to claim 1, characterized by The nanocomposite membrane (811) further comprises a support layer (8112) stacked on the inner side, outer side, or between two adjacent nanofiber membranes (8111).
5. The water filter cartridge for use in a water filter device according to claim 1, wherein The nanocomposite membrane (811) further comprises at least two layers of support layers (8112) stacked on the inner side and outer side of the nanofiber membrane (8111); or The support layer (8112) and the nanofiber membrane (8111) are stacked and staggered.
6. The water purification filter cartridge for a water purification apparatus according to claim 4 or 5, characterized by The support layer (8112) comprises a non-woven fabric layer.
7. The water filter cartridge for use in a water filter device of claim 1, wherein, The filter body (81) further comprises a support frame (812), and the nanocomposite membrane (811) is fitted and arranged outside the support frame (812).
8. The water filter cartridge for a water filter apparatus of claim 1, wherein, The filter body (81) further comprises a second carbon rod (813), and the nanocomposite membrane (811) is fitted and arranged outside the second carbon rod (813), and the water inlet of the water purification filter (8) first flows through the second carbon rod (813) and then flows through the nanocomposite membrane (811); or The second carbon rod (813) is fitted and arranged outside the nanocomposite membrane (811), and the water inlet of the water purification filter (8) first flows through the second carbon rod (813) and then flows through the nanocomposite membrane (811).
9. A water purification apparatus characterized by comprising: The water purification device comprises the following arranged on the water path: a post-filter (7); a faucet (9); a water purification filter (8) as claimed in any one of claims 1-7, and the water purification filter (8) is located between the post-filter (7) and the faucet (9).
10. A water purification apparatus characterized by comprising: The water purification device comprises the following arranged on the water path: a post-filter (7); a water purification filter (8) as claimed in any one of claims 1-6 and 8, and the water purification filter (8) is combined with the post-filter (7).