Composite water purifying filter element
By integrating pre-carbon filter, RO membrane, and post-carbon filter units into the water purifier filter cartridge, the problems of limited filter cartridge space and difficult replacement in water purifiers are solved, achieving efficient and economical water purification and easy filter cartridge maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHANGZHOU WANLIDA ZHONGHUAN TECH INC
- Filing Date
- 2025-06-16
- Publication Date
- 2026-06-19
AI Technical Summary
The separate use of existing water purifier filter cartridges leads to space constraints, high costs, and difficulties in replacing the cartridges. The wastewater discharge path of the RO membrane is also blocked, increasing the complexity of the filter cartridge piping.
Design a composite water purification filter cartridge that integrates a pre-carbon filter unit, an RO membrane unit, and a post-carbon filter unit into one module. It achieves the function of a multi-layer filter cartridge through independent water channels, simplifies the water circuit design, and adds the RO membrane flushing function.
This technology integrates multiple functions into a single filter element, reducing costs, saving installation space, simplifying the replacement process, reducing the risk of leakage, and extending the life of the RO membrane.
Smart Images
Figure CN224377685U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a composite water purification filter element. Background Technology
[0002] Water purifier filters typically consist of a pre-filter, an RO filter, and a post-filter, all separate. For small countertop water purifiers, this is difficult to manage due to space constraints. Furthermore, filter cartridges are relatively expensive, and replacing them is a significant expense. The filter media (pre-activated carbon, RO membrane, and post-activated carbon) need to be arranged compactly to ensure a proper water flow sequence and controllable resistance. Additionally, to extend the lifespan of the RO membrane, a flushing function is required, necessitating the design of an independent flow guide pipe inside the filter cartridge, directly connected to the wastewater outlet. This addresses the issue of obstructed wastewater discharge from the RO filter, increasing the complexity of the filter's piping. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a composite water purification filter element.
[0004] The technical solution adopted by this utility model to solve its technical problem is:
[0005] A composite water purifier filter element includes an outer shell and a pre-carbon filter unit, an RO membrane unit, and a post-carbon filter unit arranged sequentially from bottom to top within the outer shell. The upper end of the outer shell is provided with a raw water inlet, a purified water outlet, and a concentrate outlet. A first water channel connecting the raw water inlet and the pre-carbon filter unit is provided along the inner circumferential side wall of the outer shell. A pre-outlet channel is provided in the middle of the pre-carbon filter unit, connecting to the bottom of the RO membrane unit. An RO membrane tube is provided in the middle of the RO membrane unit. Part of the water entering the RO membrane unit from the pre-outlet channel passes through the RO membrane for osmosis filtration and then enters the RO membrane tube. The outlet end of the RO membrane tube is connected to the post-carbon filter unit, and the outlet end of the post-carbon filter unit is connected to the purified water outlet. A second water channel extends from the top of the RO membrane unit to the concentrate outlet. Another part of the water entering the RO membrane unit from the pre-outlet channel passes through the top of the RO membrane unit and enters the second water channel.
[0006] In another preferred embodiment, the lower end of the outer casing is provided with an end cap.
[0007] In another preferred embodiment, the pre-carbon unit is sandwiched between the pre-carbon upper cover and the pre-carbon lower cover. The pre-carbon upper cover is provided with an outlet hole that corresponds to and communicates with the pre-water outlet channel, and the RO membrane unit is supported on the pre-carbon upper cover.
[0008] In another preferred embodiment, the post-carbon unit includes a post-carbon housing and carbon particles filled in the post-carbon housing, with an inlet end at the bottom center of the post-carbon housing that communicates with the RO membrane tube.
[0009] In another preferred embodiment, the second water channel is biased on the rear carbon unit and extends vertically through the rear carbon unit.
[0010] In another preferred embodiment, a rear carbon cover is also included, which is located above the rear carbon unit and has a concentrate outlet hole that connects the second water channel and the concentrate outlet hole and a clean water outlet hole that connects the outlet end of the rear carbon unit and the clean water outlet hole.
[0011] In another preferred embodiment, the outer shell is a cylindrical structure.
[0012] The beneficial effects of this utility model are that it realizes the functions of pre-carbon filter, RO membrane and post-carbon filter on the premise of a single filter element. The multi-layer filter elements are integrated into a module, which reduces costs, saves installation space, reduces the difficulty of filter element replacement, and is suitable for small water purifier scenarios.
[0013] The water purification filter cartridge of this application can be installed quickly and is easy to repair and replace. Moreover, it does not require complicated split filter bottles and connecting pipes, reducing the risk of water leakage. Users can replace it quickly and easily by themselves.
[0014] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the composite water purification filter element of the present invention is not limited to the embodiments. Attached Figure Description
[0015] Figure 1 This is a cross-sectional structural diagram of a preferred embodiment of the water purification filter element of this utility model.
[0016] Figure 2 yes Figure 1 A schematic diagram of the structure in the direction of water flow. Detailed Implementation
[0017] See the example. Figure 1 As shown, the present invention provides a composite water purification filter element, which includes an outer shell 1 and a pre-carbon unit 2, an RO membrane unit 3, and a post-carbon unit 4 arranged sequentially from bottom to top inside the outer shell 1.
[0018] In this embodiment, the outer shell 1 is a cylindrical structure, and the pre-carbon unit 2, RO membrane unit 3 and post-carbon unit 4 inside it are also cylindrical.
[0019] The upper end of the outer casing 1 is provided with a raw water inlet 11, a purified water outlet 12 and a concentrated water outlet 13, and the lower end of the outer casing 1 is provided with an end cap 5.
[0020] Combination Figure 2As shown, a first water channel 6 is provided along the inner circumferential side wall of the outer shell 1, connecting the raw water inlet 11 and the pre-carbon unit 2. A pre-water outlet channel 21 is provided in the middle of the pre-carbon unit 2, which connects to the bottom of the RO membrane unit 3. An RO membrane tube 31 is provided in the middle of the RO membrane unit 3. Part of the water entering the RO membrane unit 3 from the pre-water outlet channel 21 passes through the RO membrane and then enters the RO membrane tube 31. The outlet end of the RO membrane tube 31 is connected to the post-carbon unit 4, and the outlet end of the post-carbon unit 4 is connected to the purified water outlet 12. It also includes a second water channel 7 from the top of the RO membrane unit 3 to the concentrated water outlet 13. Another part of the water entering the RO membrane unit 3 from the pre-water outlet channel 21 passes through the top of the RO membrane unit 3 and enters the second water channel 7.
[0021] Therefore, the raw water entering from the raw water inlet 11 connected to the raw water tank enters the pre-carbon filter unit 2 through the first water channel 6 for the first filtration, and then enters the RO membrane unit 3 through the pre-outlet channel 21 in the middle of the pre-carbon filter unit 2 for the second filtration. At this time, part of the water passes through the RO membrane unit 3 for RO membrane permeation filtration, enters the RO membrane tube 31, and then passes through the post-carbon filter unit 4 for the third filtration before flowing out from the clean water outlet 12. The other part of the water that does not enter the RO membrane tube flows out through the top of the RO membrane unit 3 from the second water channel 7 to the concentrate outlet 13. This part of the water can flush the RO membrane and extend its service life. The concentrate outlet 13 can be connected to the bottom of the raw water tank.
[0022] The basic structure, water path direction and working principle of the water purification filter element of this application are described above. Based on a single filter element, it realizes the functions of pre-carbon, RO membrane and post-carbon. The multi-layer filter element is integrated into a module, which reduces cost, saves installation space and reduces the difficulty of filter element replacement, and is suitable for small water purifier scenarios.
[0023] The more specific structural design is as follows:
[0024] The pre-carbon unit 2 is sandwiched between the pre-carbon upper cover 81 and the pre-carbon lower cover 82. The pre-carbon lower cover 82 is adapted to the end cover 5 of the outer shell 1. The pre-carbon upper cover 81 is provided with an outlet hole corresponding to the pre-water outlet channel 21. The RO membrane unit 3 is supported on the pre-carbon upper cover 81. The upper end surface of the pre-carbon upper cover 81 can be provided with a first limiting sleeve structure 83 for positioning the lower part of the RO membrane unit 3.
[0025] The post-carbon unit 4 includes a post-carbon housing 41 and carbon particles 42 filled within the housing. A second limiting sleeve structure 43 for positioning the upper part of the RO membrane unit 3 can be provided on the lower end face of the post-carbon housing 41. Thus, the RO membrane unit 3 is positioned between the post-carbon housing 41 and the front carbon cover 81. Furthermore, the bottom center of the post-carbon housing 41 has a water inlet 411 communicating with the RO membrane tube. This water inlet 411 can be a protruding structure and can be inserted into the upper port of the RO membrane tube 31, tightly connected by a sealing ring. A second water channel 7 is offsetly disposed on the post-carbon housing 41 of the post-carbon unit 4 and extends vertically through the housing 41.
[0026] It also includes a rear carbon unit cover 9, which is located above the rear carbon unit 4, and its upper end face is connected to the step formed by the inner wall of the upper end of the outer casing 1. The rear carbon unit cover 9 has a concentrated water outlet hole 91 that connects the second water channel 7 and the concentrated water outlet 13, and a purified water outlet hole 92 that connects the water outlet end of the rear carbon unit 4 and the purified water outlet 12. The concentrated water outlet hole 91 and the purified water outlet hole 92 are both protruding structures, and the inner wall of the upper end of the outer casing 1 is provided with a groove-shaped structure for these two protruding structures to be fitted and inserted, and they are tightly connected by a sealing ring.
[0027] With the above structure, the water purification filter element of this application has a compact structure and can be installed quickly. The integrated filter element is easy to maintain and replace, and there is no need for complicated split filter bottles and connecting pipes, which reduces the risk of water leakage. Users can replace it quickly and easily by themselves.
[0028] The above embodiments are only used to further illustrate a composite water purification filter element of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.
Claims
1. A composite water purifying filter cartridge, characterized by: It includes an outer shell and a pre-carbon unit, an RO membrane unit, and a post-carbon unit arranged sequentially from bottom to top inside the outer shell. The upper end of the outer shell is provided with a raw water inlet, a purified water outlet, and a concentrated water outlet. A first water channel connecting the raw water inlet and the pre-carbon filter unit is provided along the inner circumferential side wall of the outer casing. A pre-outlet water channel is provided in the middle of the pre-carbon filter unit, which connects to the bottom of the RO membrane unit. An RO membrane tube is provided in the middle of the RO membrane unit. Part of the water entering the RO membrane unit from the pre-outlet water channel passes through the RO membrane for permeation filtration and then enters the RO membrane tube. The outlet end of the RO membrane tube is connected to the post-carbon filter unit, and the outlet end of the post-carbon filter unit is connected to the purified water outlet. A second water channel is also provided from the top of the RO membrane unit to the concentrate outlet. Another part of the water entering the RO membrane unit from the pre-outlet water channel passes through the top of the RO membrane unit and enters the second water channel.
2. The composite water purification filter cartridge according to claim 1, characterized in that: The lower end of the outer casing is provided with an end cap.
3. The composite water filter cartridge of claim 1, wherein: The pre-carbon unit is sandwiched between the pre-carbon upper cover and the pre-carbon lower cover. The pre-carbon upper cover has an outlet hole that corresponds to and communicates with the pre-water outlet channel. The RO membrane unit is supported on the pre-carbon upper cover.
4. The composite water purification filter element according to claim 1, characterized in that: The post-carbon unit includes a post-carbon housing and carbon particles filled inside the post-carbon housing. The bottom center of the post-carbon housing has an inlet end that connects to the RO membrane tube.
5. The composite water filter cartridge of claim 4, wherein: The inlet end is designed with a raised structure and can be adapted to the upper port of the RO membrane tube.
6. The composite water filter cartridge according to claim 1 or 4, characterized in that: The second water channel is biased onto the rear carbon unit and extends vertically through the rear carbon unit.
7. The composite water filter cartridge of claim 1, wherein: It also includes a rear carbon filter cover, which is located above the rear carbon filter unit and has a concentrate outlet that connects the second water channel and the concentrate outlet, and a clean water outlet that connects the outlet end of the rear carbon filter unit and the clean water outlet.
8. The composite water filter cartridge of claim 1, wherein: The outer shell has a cylindrical structure.