Direct drinking water filtering treatment device
The quick-release components and sealed interface design simplify the filter replacement process, solve the problem of needing a special wrench to replace the filter, improve the convenience and sealing of the equipment, and make it suitable for household direct drinking water filtration devices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAN HUAHENG URBAN TECHNOLOGY DEVELOPMENT CO LTD
- Filing Date
- 2025-09-13
- Publication Date
- 2026-08-04
AI Technical Summary
Replacing the filter cartridges of existing direct drinking water filtration devices requires a special wrench, which is cumbersome and time-consuming, increasing the difficulty of use for ordinary households.
The system employs a quick-release assembly, including a button and a transmission assembly. The button controls the rotation of the connecting rod on the extension block, thereby engaging the locking block with the filter cartridge and simplifying the filter element replacement process. At the same time, the throttle and eccentric shaft enable quick locking and sealing of the joint, reducing the difficulty of operation.
It simplifies the filter replacement process, improves sealing performance, solves leakage problems caused by different nut tightening degrees and aging of sealing rings, and enhances the user's daily convenience and the equipment's sealing performance.
Smart Images

Figure CN224590829U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of filtration technology, and in particular to a direct drinking water filtration device. Background Technology
[0002] This utility model relates to a direct drinking water filtration and treatment device, which is a device capable of deeply purifying tap water to make the treated water meet direct drinking standards. It is commonly used in homes, offices, and other places to provide people with convenient and safe drinking water. Through multi-stage filtration components, it removes impurities, microorganisms, odors, and other harmful substances from the water, ensuring drinking water health.
[0003] Common equipment related to this direct drinking water filtration device includes household water purifiers, which generally consist of a shell, filter cartridges, inlet and outlet water pipes, and control valves. During operation, tap water enters the purifier through the inlet pipe and flows sequentially through different filter cartridges. For example, polypropylene melt-blown filter cartridges remove large particles such as sediment and rust; activated carbon filter cartridges adsorb organic matter, odors, and residual chlorine; and ultrafiltration or reverse osmosis membrane filter cartridges further filter bacteria, viruses, and small molecular pollutants. The water, after multi-stage filtration, flows out through the outlet pipe for direct drinking. The control valves are used to regulate the water flow direction and operate the device.
[0004] In existing technologies, replacing filter cartridges in direct drinking water filtration devices is significantly inconvenient. The design of the connection structure between the filter cartridge and the device necessitates the use of a special wrench, making the process cumbersome. Ordinary users must first locate the special wrench and then follow specific steps to disassemble the old filter cartridge and install the new one, a process that is time-consuming. For ordinary households, this replacement method increases the difficulty of daily use, hindering convenient self-maintenance and causing considerable inconvenience. Therefore, a direct drinking water filtration device is proposed to address these issues. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a direct drinking water filtration device, which aims to improve the problem that the filter element in the prior art requires a special wrench to replace and is time-consuming, which is not conducive to the daily use of ordinary households.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A direct drinking water filtration device includes a post-activated carbon filter tube, one end of which is provided with a water outlet pipe and a sealing interface assembly. Multiple retainers are slidably connected to the bottom of the post-activated carbon filter tube, and reverse osmosis cartridges are slidably connected to the bottom of the multiple retainers. An installation plate is slidably connected to the side wall of the reverse osmosis cartridges, and multiple filter cartridges are provided at the bottom of the installation plate. A top cover is slidably connected to the top of each filter cartridge, and a quick-release assembly is provided inside the top cover.
[0008] The quick-release assembly includes a button that is slidably connected to the inner wall of the upper cover. An extension block is fixedly connected to one side of the button, and a second rotating shaft is fixedly connected to the bottom of the extension block. Transmission components are provided on both sides of the second rotating shaft.
[0009] As a further description of the above technical solution:
[0010] The transmission assembly includes multiple connecting rods, which are rotatably connected to the outer wall of the second rotating shaft, and the inner wall of each connecting rod is rotatably connected to the first rotating shaft.
[0011] As a further description of the above technical solution:
[0012] A locking block is rotatably connected to the outer wall of the rotating shaft. The locking block passes through the top cover and extends to the outside, engaging with the groove on the inner wall of the filter cylinder.
[0013] As a further description of the above technical solution:
[0014] A spring is provided on one side of the extension block. One end of the spring is fixedly connected to the outer wall of the extension block, and the other end of the spring is fixedly connected to the inner wall of the upper cover.
[0015] As a further description of the above technical solution:
[0016] Each of the top covers is equipped with a filter element inside. Multiple top covers are connected by a water pipe. Multiple fixing feet are fixedly connected to the top of each top cover, and the multiple fixing feet engage with the inner wall of the mounting plate.
[0017] As a further description of the above technical solution:
[0018] The sealing interface assembly includes a connector, and multiple connectors are respectively fixedly connected to one end of the inlet pipe and the outlet pipe. The outer wall of the connector has an annular groove, and a shell is slidably connected to the outer wall of the connector.
[0019] As a further description of the above technical solution:
[0020] An eccentric shaft is rotatably connected to the outer walls on both sides of the outer shell, and a handle is rotatably connected to the outer wall of the eccentric shaft. The handle passes through the outer shell and extends into the interior.
[0021] As a further description of the above technical solution:
[0022] The outer wall of the throttle fits into the annular groove, and a sealing ring is provided at one end of the connector, which fits into the inner wall of the outer shell.
[0023] This utility model has the following beneficial effects:
[0024] 1. In this utility model, the rotating shaft on the extension block is controlled by a button, which drives the connecting rod to rotate and controls the locking of the locking block and the filter cartridge, thereby controlling the locking of the top cover and the filter cartridge, achieving easy installation and removal of the filter cartridge, simplifying the filter element replacement process, and making it simple and easy to operate. This solves the problem that filter elements need to be replaced with a special wrench, which is time-consuming and not conducive to daily use in ordinary households.
[0025] 2. In this utility model, the throttle and eccentric shaft make the protruding part of the throttle engage and lock with the groove on the connector. The connector squeezes the sealing ring against the inner wall of the outer shell to achieve a sealing effect, which reduces the difficulty of operation, improves the sealing performance, and solves the leakage problem caused by different tightening degrees of nuts and aging of the sealing ring. Attached Figure Description
[0026] Figure 1 This is a three-dimensional schematic diagram of a direct drinking water filtration device proposed in this utility model;
[0027] Figure 2 for Figure 1 Enlarged structural diagram at point A;
[0028] Figure 3 This is a cross-sectional schematic diagram of the top cover of a direct drinking water filtration device proposed in this utility model;
[0029] Figure 4 This is a side cross-sectional view of the top cover of a direct drinking water filtration device proposed in this utility model.
[0030] Figure 5 This is a cross-sectional schematic diagram of the outer casing of a direct drinking water filtration and treatment device proposed in this utility model.
[0031] Legend:
[0032] 1. Filter cartridge; 2. Connecting water pipe; 3. Mounting bracket; 4. Mounting plate; 5. Outlet pipe; 6. Post-activated carbon filter tube; 7. Reverse osmosis cartridge; 8. Inlet pipe; 9. Top cover; 10. Button; 11. Outer shell; 12. Fixing foot; 13. Locking block; 14. Shaft one; 15. Connecting rod; 16. Spring; 17. Shaft two; 18. Extension block; 19. Filter element; 20. Eccentric shaft; 21. Rotary handle; 22. Annular groove; 23. Sealing ring; 24. Connector. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] Reference Figures 1-4 This utility model provides an embodiment of a direct drinking water filtration device, including a post-activated carbon filter tube 6. The post-activated carbon filter tube 6 is used for final water purification, removing odors and residues. One end of the post-activated carbon filter tube 6 is provided with a water outlet pipe 5, which is used to deliver purified drinking water to the user terminal. One end of the water outlet pipe 5 is provided with a sealing interface assembly to ensure that the pipe connection is leak-proof. Multiple retaining seats 3 are slidably connected to the bottom of the post-activated carbon filter tube 6, which are used to fix and support the post-activated carbon filter tube 6. The bottom of the multiple card holders 3 is slidably connected to a reverse osmosis cartridge 7. The reverse osmosis cartridge 7 is used to remove dissolved impurities and heavy metal ions from the water. The side wall of the reverse osmosis cartridge 7 is slidably connected to an installation plate 4. The installation plate 4 is used to support and fix the installation position of the multiple filter cartridges 1. The bottom of the installation plate 4 is provided with multiple filter cartridges 1. The filter cartridges 1 are used to contain different levels of filter media to achieve multi-stage filtration. The top of each filter cartridge 1 is slidably connected to a top cover 9. The top cover 9 is used to seal the filter cartridge 1 and fix the position of the filter element 19. The top cover 9 is provided with a quick-release assembly.
[0035] The quick-release assembly includes a button 10, which triggers the transmission assembly to release the latch 13, enabling quick disassembly. The button 10 is slidably connected to the inner wall of the upper cover 9. An extension block 18 is fixedly connected to one side of the button 10, which transmits the pressing force of the button 10 to the transmission assembly. A second rotating shaft 17 is fixedly connected to the bottom of the extension block 18, which supports the rotational movement of the connecting rod 15. Transmission assemblies are provided on both sides of the second rotating shaft 17, which includes multiple connecting rods 15. The connecting rods 15 convert the linear movement of the button 10 into the rotational movement of the latch 13. The connecting rods 15 are rotatably connected to the outer wall of the second rotating shaft 17. A first rotating shaft 14 is rotatably connected to the inner wall of the connecting rods 15, which fixes the rotation center point of the latch 13. The latch 13 is rotatably connected to the outer wall of the first rotating shaft 14. The locking block 13 is used to engage with the groove on the inner wall of the filter cartridge 1 to fix the position of the top cover 9. The locking block 13 passes through the top cover 9 and extends to the outside and engages with the groove on the inner wall of the filter cartridge 1. A spring 16 is provided on one side of the extension block 18. The spring 16 is used to reset the button 10 and the transmission component and maintain the locking state of the locking block 13. One end of the spring 16 is fixedly connected to the outer wall of the extension block 18, and the other end of the spring 16 is fixedly connected to the inner wall of the top cover 9. Each top cover 9 is provided with a filter element 19. The filter element 19 is used to filter impurities and pollutants in the water. Multiple top covers 9 are connected to each other by a connecting water pipe 2. The connecting water pipe 2 is used to connect multiple filter cartridges 1 in series to form a complete water treatment process. Multiple fixing feet 12 are fixedly connected to the top of each top cover 9. The fixing feet 12 are used to engage with the inner wall of the mounting plate 4 to ensure that the top cover 9 is installed firmly.
[0036] Reference Figure 1 , Figure 2 and Figure 5 The sealing interface assembly includes a connector 24, which connects the outlet pipe 5 and the inlet pipe 8 to form a sealed water passage. Multiple connectors 24 are fixedly connected to one end of the outlet pipe 5 and the inlet pipe 8, respectively. An annular groove 22 is provided on the outer wall of the connector 24. The annular groove 22 is used to cooperate with the handle 21 to achieve quick locking of the connector 24. A housing 11 is slidably connected to the outer wall of the connector 24. The housing 11 is used to accommodate the internal structure of the sealing interface assembly and provide protection. Eccentric joints are rotatably connected to the outer walls on both sides of the housing 11. Shaft 20, eccentric shaft 20 is used to drive handle 21 to rotate, realize the locking and unlocking of connector 24. The handle 21 is rotatably connected to the outer wall of eccentric shaft 20. The handle 21 is used for manual operation to realize the quick connection and separation of connector 24. The handle 21 passes through the outer shell 11 and extends into the interior. The outer wall of handle 21 fits against the annular groove 22. One end of connector 24 is provided with sealing ring 23. Sealing ring 23 is used to ensure the sealing of the connection of connector 24 and prevent water leakage. Sealing ring 23 fits against the inner wall of outer shell 11.
[0037] Working principle: During the simple disassembly and replacement of filter element 19, first press button 10 to compress spring 16 on extension block 18. The rotating shaft 17 on extension block 18 drives one end of connecting rod 15 to move. At this time, connecting rod 15 rotates and drives rotating shaft 14 inward. The locking block 13 slides in the groove at the bottom of the upper cover 9, releasing the fixation of filter cylinder 1. The filter element 19 inside filter cylinder 1 can then be taken out. After replacement, push filter cylinder 1 back to its original position. Under the reaction force of spring 16, locking block 13 re-engages with the groove on the inner wall of filter cylinder 1, achieving simple installation and removal of filter cylinder 1. This simplifies the replacement process of filter element 19, making it simple and easy to operate. It solves the problem that filter element 19 requires a special wrench for replacement, which is time-consuming and not conducive to daily use in ordinary households.
[0038] When connecting water pipes to the outlet pipe 5 and inlet pipe 8, first rotate the handle 21 around the eccentric shaft 20 until it is perpendicular to the outer casing 11, then insert the connector 24 connected to the water pipe into the outer casing 11, and then press the handle 21 inward. The protruding part next to the eccentric shaft 20 of the handle 21 engages and locks with the annular groove 22 on the connector 24. At this time, the connector 24 presses the sealing ring 23 against the inner wall of the outer casing 11 to achieve a sealing effect, reducing the difficulty of operation, improving the sealing performance, and solving the leakage problem caused by different tightening degrees of the nut and aging of the sealing ring 23.
[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A direct drinking water filtering treatment device comprising a post-activated carbon filter tube (6), characterized in that: The post-activated carbon filter tube (6) is provided with a water outlet pipe (5) at one end, and a sealing interface assembly is provided at one end of the water outlet pipe (5). Multiple card holders (3) are slidably connected to the bottom of the post-activated carbon filter tube (6). A reverse osmosis cylinder (7) is slidably connected to the bottom of the multiple card holders (3). An installation plate (4) is slidably connected to the side wall of the reverse osmosis cylinder (7). Multiple filter cylinders (1) are provided at the bottom of the installation plate (4). A top cover (9) is slidably connected to the top of each filter cylinder (1). A quick-release assembly is provided inside the top cover (9). The quick-release assembly includes a button (10), which is slidably connected to the inner wall of the upper cover (9). An extension block (18) is fixedly connected to one side of the button (10), and a rotating shaft (17) is fixedly connected to the bottom of the extension block (18). Transmission components are provided on both sides of the rotating shaft (17).
2. The direct drinking water filtration treatment device according to claim 1, characterized in that: The transmission assembly includes multiple connecting rods (15), which are rotatably connected to the outer wall of the second rotating shaft (17), and the inner wall of each connecting rod (15) is rotatably connected to the first rotating shaft (14).
3. The direct drinking water filtration treatment device according to claim 2, wherein: The outer wall of the rotating shaft (14) is rotatably connected to a locking block (13), which penetrates the upper cover (9) and extends to the outside and engages with the groove on the inner wall of the filter cylinder (1).
4. The direct drinking water filtration treatment device according to claim 3, wherein: A spring (16) is provided on one side of the extension block (18). One end of the spring (16) is fixedly connected to the outer wall of the extension block (18), and the other end of the spring (16) is fixedly connected to the inner wall of the upper cover (9).
5. The direct drinking water filtration treatment device according to claim 1, wherein: Each of the top covers (9) is provided with a filter element (19) inside. Multiple top covers (9) are connected to each other by a water pipe (2). Multiple fixing feet (12) are fixedly connected to the top of the top cover (9). The multiple fixing feet (12) are engaged with the inner wall of the mounting plate (4).
6. The direct drinking water filtration treatment device according to claim 1, wherein: The sealing interface assembly includes a connector (24), and multiple connectors (24) are respectively fixedly connected to one end of the water outlet pipe (5) and the water inlet pipe (8). The outer wall of the connector (24) is provided with an annular groove (22), and the outer wall of the connector (24) is slidably connected with a shell (11).
7. The direct drinking water filtration treatment device according to claim 6, wherein: An eccentric shaft (20) is rotatably connected to the outer walls on both sides of the outer shell (11), and a throttle (21) is rotatably connected to the outer wall of the eccentric shaft (20). The throttle (21) passes through the outer shell (11) and extends into the interior.
8. The direct drinking water filtration treatment device according to claim 7, characterized in that: The outer wall of the throttle (21) fits into the annular groove (22), and a sealing ring (23) is provided at one end of the connector (24), which fits into the inner wall of the outer shell (11).