Water purifier filter assembly structure

Abstract

This utility model relates to the field of water purifier technology, and in particular to a filter cartridge assembly structure for water purifiers. It includes a water purifier housing, with a housing cover inserted into one end of the housing. Multiple water purifier filter cartridges are disposed inside the housing. One end of each filter cartridge is detachably connected to an end cover via a quick-release mechanism. The end cover is tightly inserted into the housing cover. The quick-release mechanism includes a first connector and a second connector. The first connector is a threaded tube evenly fixed to the end cover, with internal threads on its inner circumference. Compared to existing technologies, this device allows for quick disassembly of individual or multiple filter cartridges via the quick-release mechanism. This eliminates the need to replace the entire water purifier filter cartridge when a single cartridge is damaged, thus improving worker efficiency.

Description

Technical Field

[0001] This utility model relates to the field of water purifier technology, and in particular to the filter element assembly structure of a water purifier. Background Technology

[0002] As a core device for improving drinking water quality in homes and businesses, water purifiers rely on multiple filter elements with different functions, such as PP cotton filters, activated carbon filters, and ultrafiltration membrane filters, for their purification efficiency. Mainstream multi-stage filtration water purifiers typically employ a single pressure shell design, integrating multiple filter elements in parallel or serial configurations to form a complete purification chain from coarse filtration to fine filtration, meeting diverse water quality purification needs.

[0003] Currently, most water purifiers on the market use a fixed adhesive structure for their filter cartridges. The ends of multiple filter cartridges are permanently fixed to corresponding holes in an integrated end cap or connecting plate using adhesives such as epoxy resin AB glue or hot melt adhesive. The end cap is then sealed and assembled into the water purifier's outer casing. While this traditional structure ensures a tight seal, it has a significant drawback: when one of the multiple filter cartridges reaches the end of its lifespan or is accidentally damaged and needs replacement, because all the cartridges are cured into an inseparable unit by the adhesive, users or repair personnel cannot replace the faulty cartridge individually. They must discard and replace the entire filter assembly (including other undamaged cartridges) along with the end cap. This not only results in significant material waste, violating the principles of sustainable development, but also substantially increases user operating and maintenance costs, while reducing the flexibility and convenience of filter cartridge replacement.

[0004] Therefore, there is an urgent need for an assembly structure that enables quick disassembly and replacement of individual filter cartridges, in order to solve the technical pain points of existing fixed adhesive structures, such as resource waste, high maintenance costs, and inconvenience in replacement. Utility Model Content

[0005] To overcome the technical defects of the existing technology, this utility model provides a filter cartridge assembly structure for water purifiers, which makes it easier for staff to replace individual water purifier filter cartridges.

[0006] The technical solution adopted by this utility model is: a filter element assembly structure for a water purifier, including a water purifier shell, a shell cover inserted into the end of the water purifier shell, multiple water purifier filter elements disposed inside the water purifier shell, and an end cover detachably connected to one end of the multiple water purifier filter elements through a quick-release component, the end cover being tightly inserted into the shell cover.

[0007] Preferably, it should be noted that the threaded tube and the end cap are integrally formed by injection molding. The quick-release component includes a first connector and a second connector. The first connector is a threaded tube that is uniformly fixed on the end cap. The inner circumference of the threaded tube is provided with internal threads.

[0008] Preferably, in order to connect the threaded connector to the threaded pipe, the second connector is a threaded connector with a threaded structure on its outer surface. The threaded connector is located at the end of the multi-strand water purifier filter element, and the threaded connector is threadedly engaged with the threaded pipe.

[0009] Preferably, in order to provide another disassembly method, a circular hole is evenly provided on one side surface of the end cap, and the quick-release component includes a plug and a rotating disk. The plug is fixedly installed at the end of the water purifier filter element and is inserted into the circular hole.

[0010] Preferably, in order to limit the position of the connector by means of the snap-fit ​​bracket, a rotating hole is provided in the center of the end cover, the rotating disk is rotatably installed in the rotating hole, the snap-fit ​​cavity is provided in a circumferential array in the end cover, the snap-fit ​​bracket is slidably installed in the snap-fit ​​cavity, one end of the snap-fit ​​bracket is inserted into the connector, and the connector is provided with a snap-fit ​​groove that mates with one end of the snap-fit ​​bracket.

[0011] Preferably, in order to achieve self-locking of the connector, snap-fit ​​springs are symmetrically fixedly installed in the snap-fit ​​cavity, one end of the snap-fit ​​springs is fixedly connected to the snap-fit ​​frame, and one end of the snap-fit ​​frame is fixedly installed with a wedge-shaped rod.

[0012] Preferably, in order to increase the connection force between the wedge rod and the rotating disk, positioning blocks are uniformly fixedly installed on the outer circumferential surface of the rotating disk. One end of the positioning block is arc-shaped, and the tail of the arc is close to a straight line. Elastic teeth are uniformly arranged on the upper surface of one end of the positioning block, and one end of the wedge rod is engaged with the multiple elastic teeth.

[0013] Preferably, in order to facilitate the deformation of the elastic teeth when rotating the rotating disk, making it easier for the operator to rotate the rotating disk, the elastic teeth are made of rubber.

[0014] The beneficial effects of this utility model are: compared with the prior art, this device can quickly disassemble individual or multiple multi-channel water purifier filter elements through quick-release parts, so that when a single filter element in the water purifier is damaged, it is not necessary to replace the entire water purifier filter element, thereby improving the work efficiency of the staff. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram showing the position of the filter element in the water purifier of this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the first embodiment of the present utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present utility model.

[0019] Figure 5 This is a schematic diagram showing the position of the rotating disk of this utility model.

[0020] Figure 6 This is a schematic diagram of the structure of the rotating disk of this utility model.

[0021] Figure 7 This is a schematic diagram showing the position of the snap-fit ​​groove in this utility model.

[0022] Figure 8 for Figure 3 Enlarged view of the structure at point A in the middle.

[0023] Figure 9 for Figure 5 Enlarged view of the structure at point B in the middle.

[0024] Explanation of reference numerals in the attached figures: 1. Water purifier outer shell; 2. Shell cover; 3. Water purifier filter element; 4. Quick release part; 411. Threaded pipe; 412. Threaded connector; 421. Plug; 422. Rotary disc; 423. Snap-fit ​​cavity; 424. Snap-fit ​​bracket; 425. Snap-fit ​​groove; 426. Snap-fit ​​spring; 427. Wedge rod; 428. Positioning block; 429. Elastic tooth; 5. Round hole; 6. End cap. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings: like Figure 1-9 As shown, the filter assembly structure of the water purifier provided in this embodiment includes a water purifier shell 1, a shell cover 2 is inserted into the end of the water purifier shell 1, and multiple water purifier filter elements 3 are provided inside the water purifier shell 1. One end of the multiple water purifier filter elements 3 is detachably connected to an end cover 6 through a quick-release piece 4. The end cover 6 is tightly inserted into the shell cover 2.

[0026] Example 1: The quick-release component 4 includes a first connector and a second connector. The first connector is a threaded tube 411 uniformly and fixedly installed on the end cover 6. The inner circumference of the threaded tube 411 is provided with internal threads. The second connector is a threaded connector 412 with a threaded structure on its outer surface. The threaded connector 412 is located at the end of the multi-strand water purifier filter element 3. The threaded connector 412 and the threaded tube 411 are threadedly engaged. It should be noted that the first connector is the threaded tube 411, which is uniformly and fixedly installed on the end cover 6 by integral injection molding. Its inner circumference is machined with standard internal threads. The second connector is the threaded connector 412, whose outer surface is machined with the same internal threads as the first connector. The internal threads of the water purifier filter element 3 are matched with the external thread structure. One end of the filter element 3 is fixedly inserted into the threaded connector 412. During installation, the threaded connector 412 of each filter element is aligned with the corresponding threaded tube 411 on the end cover 6. The filter element body is rotated to achieve thread engagement, thereby firmly installing the filter element on the end cover 6. During disassembly, the filter element is rotated in the opposite direction to separate it from the end cover 6. Currently, multi-strand water purifier filter elements 3 are usually glued to the end cover 6 during production. When replacing the water purifier filter elements 3, the multi-strand water purifier filter elements 3 are usually replaced simultaneously. Therefore, this embodiment can realize the individual replacement of a single water purifier filter element 3.

[0027] Example 2: A circular hole 5 is evenly distributed on one side surface of the end cap 6. The quick-release component 4 includes a connector 421 and a rotating disk 422. The connector 421 is fixedly installed at the end of the water purifier filter element 3 and is inserted into the circular hole 5. A rotating hole is provided in the center of the end cap 6, and the rotating disk 422 is rotatably installed in the rotating hole. A snap-fit ​​cavity 423 is arranged in a circular array inside the end cap 6. A snap-fit ​​bracket 424 is slidably installed in the snap-fit ​​cavity 423. One end of the snap-fit ​​bracket 424 is inserted into the connector 421. A snap-fit ​​groove 425 that mates with one end of the snap-fit ​​bracket 424 is provided in the connector 421. Snap-fit ​​springs 426 are symmetrically fixedly installed in the snap-fit ​​cavity 423. One end of the snap-fit ​​spring 426 is fixedly connected to the snap-fit ​​bracket 424. A wedge-shaped rod 427 is fixedly installed at one end of the snap-fit ​​bracket 424. It should be noted that this embodiment provides... A more convenient and efficient central linkage quick-release structure is proposed, which solves the cumbersome problem of needing to individually screw on each filter element in Embodiment 1. In this embodiment, the end cap 6 serves as the core carrier, with round holes 5 evenly distributed on one side surface for positioning the filter element. The quick-release component 4 mainly includes a plug connector 421 and a rotating disk 422. The plug connector 421 is fixedly installed at the end of the water purifier filter element 3 and is directly inserted into the round hole 5 of the end cap 6 during installation to achieve initial positioning. A rotating hole is opened in the center of the end cap 6, and a rotating disk 422 is rotatably installed in the rotating hole through a bearing or a simple shaft hole clearance fit. Inside the end cap 6, multiple snap-fit ​​cavities 423 are arranged in a circumferential array around the rotating disk 422, the number of which corresponds to the number of filter elements. A snap-fit ​​bracket 424 (which can be regarded as a locking pin) is slidably installed in each snap-fit ​​cavity 423.

[0028] Initial state (unlocked): Under the preload of the snap-fit ​​spring 426, the snap-fit ​​bracket 424 is pushed away from the center of the rotating disk 422, causing its end to retract from the area where the plug 421 is located.

[0029] Locking process: After the filter element connector 421 is inserted into the round hole 5, the rotating disk 422 is rotated. The rotating disk 422 drives the snap-fit ​​bracket 424 through its peripheral positioning block 428, overcoming the elastic force of the snap-fit ​​spring 426, so that the end of the snap-fit ​​bracket 424 is inserted into the preset snap-fit ​​groove 425 inside the connector 421, thereby realizing the mechanical locking of the filter element. It should be noted that one end of the water purifier filter element 3 is usually fixedly installed inside one end of the connector 421, and when the connector 421 is fixed by the snap-fit ​​bracket 424, the water purifier filter element 3 can be fixed and limited.

[0030] Positioning blocks 428 are uniformly fixedly installed on the outer circumference of the rotating disk 422. One end of the positioning block 428 is arc-shaped, and the tail of the arc is close to a straight line. Elastic teeth 429 are uniformly arranged on the upper surface of one end of the positioning block 428. One end of the wedge rod 427 is engaged with multiple elastic teeth 429. The elastic teeth 429 are made of rubber. It should be noted that positioning blocks 428 are uniformly fixedly installed on the outer circumference of the rotating disk 422. The contour of the positioning block 428 is specially designed. One end is arc-shaped so that it can smoothly push the wedge rod 427 in the initial stage of rotation. The tail of the arc is close to a straight line. This straight line segment constitutes the self-locking section of the mechanism. When the wedge rod 427 is pushed to contact this straight line segment, the line of action of the force almost passes through the center of rotation, effectively avoiding reverse rotation unlocking caused by filter element vibration or water pressure impact, thus realizing mechanical self-locking.

[0031] In order to provide a damping feel and clear positioning indication when locking, and to allow for certain manufacturing tolerances, elastic teeth 429 are uniformly provided on the upper surface of this end of the positioning block 428. These elastic teeth 429 are made of rubber or other elastic materials with a high coefficient of friction and easy deformation. One end of the wedge rod 427 (i.e. the end that contacts the positioning block 428) is in mutual compression and friction contact with the multiple elastic teeth 429.

[0032] During operation, when the rotating disk 422 is rotated, the elastic teeth 429 on the positioning block 428 sequentially traverse and press against the surface of the wedge-shaped rod 427. This process produces a noticeable jerking sensation, providing tactile feedback to the user. When rotating to a straight section, the elastic teeth 429 and the wedge-shaped rod 427 generate the maximum static friction, requiring a slightly larger torque to continue rotating or rotate in the opposite direction. This not only indicates to the user that the locking position has been reached but also further enhances the reliability of the locking. Furthermore, the inner circumferential surface of the rotating disk 422 is polygonal to facilitate the use of tools by operators to rotate the rotating disk 422. The above description illustrates the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of the utility model as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A filter cartridge assembly structure for a water purifier, comprising a water purifier housing (1), characterized in that: The end of the water purifier housing (1) is provided with a housing cover (2). Multiple water purifier filter elements (3) are provided inside the water purifier housing (1). One end of the multiple water purifier filter elements (3) is detachably connected to an end cover (6) through a quick-release piece (4). The end cover (6) is tightly inserted into the housing cover (2).

2. The filter cartridge assembly structure of the water purifier according to claim 1, characterized in that: The quick-release component (4) includes a first connector and a second connector. The first connector is a threaded tube (411) that is uniformly fixed on the end cap (6). The inner circumference of the threaded tube (411) is provided with internal threads.

3. The filter cartridge assembly structure of the water purifier according to claim 2, characterized in that: The second connector is a threaded connector (412) with a threaded structure on its outer surface. The threaded connector (412) is located at the end of the multi-strand water purifier filter element (3). The threaded connector (412) is threadedly engaged with the threaded tube (411).

4. The filter cartridge assembly structure of the water purifier according to claim 1, characterized in that: The end cap (6) has a circular hole (5) evenly distributed on one side surface. The quick-release component (4) includes a connector (421) and a rotating disk (422). The connector (421) is fixedly installed at the end of the water purifier filter element (3) and is inserted into the circular hole (5).

5. The filter cartridge assembly structure of the water purifier according to claim 4, characterized in that: A rotating hole is provided in the center of the end cap (6), and the rotating disk (422) is rotatably installed in the rotating hole. The end cap (6) has a snap-fit ​​cavity (423) arranged in a circular array. A snap-fit ​​bracket (424) is slidably installed in the snap-fit ​​cavity (423). One end of the snap-fit ​​bracket (424) is inserted into the connector (421). The connector (421) has a snap-fit ​​groove (425) that matches one end of the snap-fit ​​bracket (424).

6. The filter cartridge assembly structure of the water purifier according to claim 5, characterized in that: A snap-fit ​​spring (426) is symmetrically fixedly installed in the snap-fit ​​cavity (423). One end of the snap-fit ​​spring (426) is fixedly connected to the snap-fit ​​frame (424). A wedge rod (427) is fixedly installed at one end of the snap-fit ​​frame (424).

7. The filter cartridge assembly structure of the water purifier according to claim 6, characterized in that: The outer circumferential surface of the rotating disk (422) is uniformly fixed with positioning blocks (428). One end of the positioning block (428) is arc-shaped, and the tail of the arc is close to a straight line. The upper surface of one end of the positioning block (428) is uniformly provided with elastic teeth (429). One end of the wedge rod (427) is engaged with the multiple elastic teeth (429).

8. The filter cartridge assembly structure of the water purifier according to claim 7, characterized in that: The elastic tooth (429) is made of rubber.

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