Composite water purification filter element

Abstract

This utility model discloses a composite water purification filter element, comprising: a primary filter element with an end cap at its first end; a filter element mounting cylinder containing a secondary filter element, the first end of which has a first connecting portion and an inlet, and the second end having an outlet; and a connecting cap having a second connecting portion, a snap-fit ​​portion, and a water passage, wherein the snap-fit ​​portion snaps into the second end of the primary filter element, the water passage communicates with the inlet, the first connecting portion and the second connecting portion are detachably connected, the primary filter element and the filter element mounting cylinder are detachably connected via the connecting cap, and the primary filter element and the filter element mounting cylinder are coaxially arranged. This utility model can extend the service life of the entire filter element and reduce usage costs.

Description

Technical Field

[0001] This utility model relates to the field of filter element technology, and in particular to composite water purification filter elements. Background Technology

[0002] Existing filter cartridges using a single material generally cannot fully purify water, have a short lifespan, and require frequent replacement, increasing operating costs and maintenance difficulty. Therefore, composite water purifier filter cartridges have emerged on the market. These cartridges effectively remove impurities, heavy metals, and other harmful substances from water through multiple filtration technologies. However, due to the different materials used in each stage of a composite water purifier filter cartridge, their lifespans differ in actual water purification equipment. When one stage of the filter cartridge reaches the end of its lifespan, the entire cartridge must be replaced, resulting in resource waste and increased operating costs. Utility Model Content

[0003] This utility model provides a composite water purification filter element, which can extend the service life of the entire filter element and reduce the cost of use.

[0004] To solve the above-mentioned technical problems, this utility model provides a composite water purification filter element, characterized in that it comprises:

[0005] A primary filter element, wherein an end cap is provided at the first end of the primary filter element;

[0006] A filter element mounting cylinder, wherein a secondary filter element is provided inside the filter element mounting cylinder, a first connecting part is provided at the first end of the filter element mounting cylinder, a water inlet is provided at the first end of the filter element mounting cylinder, and a water outlet is provided at the second end of the filter element mounting cylinder;

[0007] The connecting cover has a second connecting part, a snap-fit ​​part, and a water inlet. The snap-fit ​​part snaps into the second end of the primary filter element, and the water inlet communicates with the water inlet. The first connecting part and the second connecting part are detachably connected. The primary filter element and the filter element mounting cylinder are detachably connected through the connecting cover. The primary filter element and the filter element mounting cylinder are coaxially arranged.

[0008] As a preferred embodiment of the above technical solution, the outer side wall of the first connecting part is provided with a connecting protrusion, the inner side wall of the second connecting part is provided with a connecting groove, the first connecting part is inserted into the second connecting part, and the connecting protrusion is engaged in the connecting groove so that the first connecting part and the second connecting part can be detachably connected.

[0009] As a preferred embodiment of the above technical solution, the connecting protrusion is a strip-shaped connecting protrusion, which is disposed on the outer side wall of the first connecting portion along the circumferential direction of the first connecting portion, and the connecting groove is disposed on the inner side wall of the second connecting portion along the circumferential direction of the second connecting portion.

[0010] As a preferred embodiment of the above technical solution, one end of the connecting groove is provided with an opening, the other end of the connecting groove is provided with a positioning part, and one end of the connecting protrusion abuts against the positioning part.

[0011] As a preferred embodiment of the above technical solution, the inner wall of the connecting groove is provided with a limiting recess, and the outer wall of the connecting protrusion is provided with a limiting protrusion, wherein the limiting recess and the limiting protrusion are in a convex-concave fit.

[0012] As a preferred embodiment of the above technical solution, a plurality of protruding ribs are provided on the inner sidewall of the snap-fit ​​part, the primary filter element is inserted into the snap-fit ​​part, and the primary filter element abuts against the protruding ribs.

[0013] As a preferred embodiment of the above technical solution, the ribs are arranged along the axial direction of the snap-fit ​​portion, and a plurality of the ribs are evenly distributed along the circumference of the snap-fit ​​portion on the inner sidewall of the snap-fit ​​portion.

[0014] As a preferred embodiment of the above technical solution, a guide cone surface is provided at the opening of the snap-fit ​​portion.

[0015] As a preferred embodiment of the above technical solution, the end of the first connecting part is provided with a first annular sealing part, the bottom of the second connecting part is provided with a second annular sealing part, the water inlet is provided in the first annular sealing part, and the water outlet is provided in the second annular sealing part.

[0016] As a preferred embodiment of the above technical solution, a third annular sealing part is provided at the bottom of the snap-fit ​​part, the water outlet is disposed in the third annular sealing part, and the second end of the primary filter element abuts against the third annular sealing part.

[0017] This utility model provides a composite water purification filter element, comprising: a primary filter element, a filter element mounting cylinder, and a connecting cap. A secondary filter element is disposed inside the filter element mounting cylinder. The primary filter element can be made of columnar PP cotton, compressed carbon rods, ceramics, PP+carbon combination, or other filter media. The secondary filter element can be made of quartz sand, granular activated carbon, FOF, KDF, maifan stone, resin, weakly alkaline balls, or other functional filter media. In use, the second end of the primary filter element is inserted into the connecting part, and then connected to the filter element mounting cylinder via the connecting cap, thereby achieving a tight connection between the primary and secondary filter elements. In this way, water entering through the inlet first undergoes primary filtration through the primary filter element, and then flows into the secondary filter element for further purification through the outlet. After passing through the secondary filter element, the filtered water finally flows out from the outlet, ensuring the purity of the water. The composite water purification filter cartridge makes the water treatment process more efficient. When the service life of the primary filter cartridge or the secondary filter cartridge expires, only the corresponding filter cartridge needs to be replaced, instead of replacing the entire composite water purification filter cartridge. This ensures that the primary filter cartridge or the secondary filter cartridge can reach the end of its service life, thereby reducing the cost of using the filter cartridge.

[0018] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the composite water purification filter element in an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the composite water purification filter element in the embodiment of this utility model;

[0021] Figure 3 This is a three-dimensional structural diagram of the filter element mounting cylinder of the composite water purification filter element in an embodiment of this utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the connecting cover of the composite water purification filter element in an embodiment of this utility model;

[0023] Figure 5 This is a three-dimensional structural diagram of the connecting cover of the composite water purification filter element in an embodiment of this utility model;

[0024] In the diagram: 1. Primary filter element; 2. Filter element mounting cylinder; 3. Secondary filter element; 4. Connecting cap; 101. End cap; 201. First connecting part; 202. Water inlet; 203. Water outlet; 204. Connecting protrusion; 205. Limiting protrusion; 206. First annular sealing part; 401. Second connecting part; 402. Snap-fit ​​part; 403. Water outlet; 404. Connecting groove; 405. Opening part; 406. Positioning part; 407. Limiting recess; 408. Rib; 409. Guide cone surface; 410. Second annular sealing part; 411. Third annular sealing part. Detailed Implementation

[0025] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] See Figures 1 to 5 This utility model provides a composite water purification filter element, characterized in that it includes:

[0027] A primary filter element 1, wherein an end cap 101 is provided at the first end of the primary filter element 1;

[0028] A filter element mounting cylinder 2 is provided inside the filter element mounting cylinder 2, a second-stage filter element 3 is provided at the first end of the filter element mounting cylinder 2, a first connecting part 201 is provided at the first end of the filter element mounting cylinder 2, a water inlet 202 is provided at the first end of the filter element mounting cylinder 2, and a water outlet 203 is provided at the second end of the filter element mounting cylinder 2.

[0029] The connecting cover 4 is provided with a second connecting part 401, a snap-fit ​​part 402 and a water outlet 403. The snap-fit ​​part 402 snaps into the second end of the primary filter element 1, and the water outlet 403 communicates with the water inlet 202. The first connecting part 201 and the second connecting part 401 are detachably connected. The primary filter element 1 and the filter element mounting cylinder 2 are detachably connected through the connecting cover 4. The primary filter element 1 and the filter element mounting cylinder 2 are coaxially arranged.

[0030] This utility model provides a composite water purification filter element, including: a primary filter element 1, a filter element mounting cylinder 2, and a connecting cap 4. A secondary filter element 3 is disposed inside the filter element mounting cylinder 2. The primary filter element 1 can be made of columnar PP cotton, compressed carbon rods, ceramics, PP+carbon combination, or other filter media. The secondary filter element 3 can be made of quartz sand, granular activated carbon, FOF, KDF, maifan stone, resin, weakly alkaline balls, or other functional filter media. In use, the second end of the primary filter element 1 is inserted into the connecting part, and then connected to the filter element mounting cylinder 2 via the connecting cap 4, thereby achieving a tight connection between the primary filter element 1 and the secondary filter element 3. In this way, water enters through the inlet 202, first undergoes primary filtration through the primary filter element 1, and then flows into the secondary filter element 3 through the outlet 403 for further purification. After the filtered water passes through the secondary filter element 3, it finally flows out from the outlet 203, ensuring the purity of the water. The composite water purification filter cartridge makes the water treatment process more efficient. When the service life of the primary filter cartridge 1 or the secondary filter cartridge 3 expires, only the corresponding filter cartridge needs to be replaced, without replacing the entire composite water purification filter cartridge. This ensures that the primary filter cartridge 1 or the secondary filter cartridge 3 can reach the end of their service life, thereby reducing the cost of using the filter cartridge.

[0031] In a further embodiment of this invention, the outer side wall of the first connecting part 201 is provided with a connecting protrusion 204, and the inner side wall of the second connecting part 401 is provided with a connecting groove 404. The first connecting part 201 is inserted into the second connecting part 401, and the connecting protrusion 204 is engaged in the connecting groove 404 so that the first connecting part 201 and the second connecting part 401 are detachably connected.

[0032] In this embodiment, the connecting protrusion 204 is engaged in the connecting groove 404, making the first connecting part 201 and the second connecting part 401 detachably connected. When disassembling or assembling the filter element, the user can easily rotate the connecting cover 4 to disengage the connecting protrusion 204 from the connecting groove 404, thereby separating the connecting cover 4 from the filter element mounting cylinder 2, and thus separating the primary filter element 1 and the secondary filter element 3. This ultimately enables quick disassembly and replacement of the filter element, improving the stability of the connection and the convenience of replacing the filter element.

[0033] In a further embodiment of this invention, the connecting protrusion 204 is a strip-shaped connecting protrusion 204, which is disposed on the outer side wall of the first connecting portion 201 along the circumferential direction of the first connecting portion 201, and the connecting groove 404 is disposed on the inner side wall of the second connecting portion 401 along the circumferential direction of the second connecting portion 401.

[0034] In this embodiment, the connecting groove 404 is disposed on the inner sidewall of the second connecting portion 401 along the circumferential direction of the second connecting portion 401. This allows the connecting groove 404 to restrict the movement of the connecting protrusion 204 in the axial direction of the connecting cover 4, ensuring that no rotational torque is generated during use, thereby preventing the connecting cover 4 from loosening with the filter cartridge mounting cylinder 2 during use. The connecting protrusion 204 is a strip-shaped connecting protrusion 204, which increases the contact area between the connecting protrusion 204 and the connecting groove 404, thereby enhancing the bonding force of the connection. This can improve the connection strength between the filter cartridge mounting cylinder 2 and the connecting cover 4. Furthermore, the shape and size of the strip-shaped connecting protrusion 204 match the connecting groove 404, thereby maintaining the sealing performance and filtration effect of the water filtration equipment.

[0035] In a further embodiment of this invention, one end of the connecting groove 404 is provided with an opening 405, and the other end of the connecting groove 404 is provided with a positioning part 406, and one end of the connecting protrusion 204 abuts against the positioning part 406.

[0036] In this embodiment, one end of the connecting groove 404 is provided with an opening 405, and the other end of the connecting groove 404 is provided with a positioning part 406. During assembly, the first connecting part 201 is inserted into the second connecting part 401, and one end of the connecting protrusion 204 is aligned with the opening of the connecting groove 404. The filter element mounting cylinder 2 is rotated so that the connecting protrusion 204 is fully inserted into the connecting groove 404. When the connecting protrusion 204 slides to the positioning part 406, it is rotated into place, and the assembly is completed. During disassembly, the filter element mounting cylinder 2 is rotated to remove the connecting protrusion 204 from the connecting groove 404, and then the first connecting part 201 and the second connecting part 401 can be separated. In this way, users can quickly replace the filter element without cumbersome tools, making the entire assembly process simple and quick, and ensuring the firmness of the connection.

[0037] In a further embodiment of this invention, the inner sidewall of the connecting groove 404 is provided with a limiting recess 407, and the outer sidewall of the connecting protrusion 204 is provided with a limiting protrusion 205, wherein the limiting recess 407 and the limiting protrusion 205 are in a concave-convex fit.

[0038] In this embodiment, the inner wall of the connecting groove 404 is provided with a limiting recess 407, and the outer wall of the connecting protrusion 204 is provided with a limiting protrusion 205. During assembly, when the connecting protrusion 204 is fully inserted into the connecting groove 404 and slides to the positioning part 406, the limiting protrusion 205 and the limiting recess 407 cooperate with each other to ensure that the connecting protrusion 204 will not accidentally slide out of the connecting groove 404 during use, thereby further improving the reliability of the connection. Due to the interaction between the limiting recess 407 and the limiting protrusion 205, the stability and durability of the overall structure are also enhanced.

[0039] In a further embodiment of this invention, a plurality of protruding ribs 408 are provided on the inner sidewall of the snap-fit ​​portion 402, the primary filter element 1 is inserted into the snap-fit ​​portion 402, and the primary filter element 1 abuts against the protruding ribs 408.

[0040] In this embodiment, a plurality of protruding ribs 408 are provided on the inner sidewall of the snap-fit ​​portion 402. When the primary filter element 1 is inserted into the snap-fit ​​portion 402, the protruding ribs 408 can compress the primary filter element 1, thereby improving the tighter fit between the primary filter element 1 and the snap-fit ​​portion 402. This design not only improves the stability of the filter element, but also effectively prevents the filter element from shifting during the filtration process, ensuring the normal operation of the water filtration equipment.

[0041] In a further embodiment of this invention, the ribs 408 are arranged along the axial direction of the snap-fit ​​portion 402, and a plurality of the ribs 408 are evenly distributed along the circumference of the snap-fit ​​portion 402 on the inner sidewall of the snap-fit ​​portion 402.

[0042] In this embodiment, since the filter element mounting cylinder 2 and the connecting cover 4 are assembled by rotation during assembly, the ribs 408 are arranged along the axial direction of the snap-fit ​​portion 402, which can restrict the circumferential rotation of the primary filter element 1 relative to the connecting cover 4 during assembly and disassembly. During assembly, if the user grasps the primary filter element 1 and rotates it, the connecting cover 4 can also be rotated, making the assembly and disassembly process more convenient. Several ribs 408 are evenly distributed along the circumference of the snap-fit ​​portion 402 on the inner wall of the snap-fit ​​portion 402, so that the pressure between the primary filter element 1 and the connecting cover 4 is evenly distributed, reducing the possibility of filter element damage due to excessive local force.

[0043] In a further embodiment of this invention, a guide cone surface 409 is provided at the opening of the snap-fit ​​portion 402.

[0044] In this embodiment, a guide cone surface 409 is provided at the opening of the locking part 402. When the primary filter element 1 is inserted into the locking part 402, the guide cone surface 409 guides the primary filter element 1 smoothly into the locking part 402. Simultaneously, the cone surface design serves as an automatic calibration mechanism, ensuring correct alignment between the primary filter element 1 and the locking part 402. This reduces the risk of malfunctions and leaks caused by improper filter element installation during use. Furthermore, the guide cone surface 409 simplifies and expedites filter element replacement.

[0045] In a further embodiment of this invention, the end of the first connecting portion 201 is provided with a first annular sealing portion 206, the bottom of the second connecting portion 401 is provided with a second annular sealing portion 410, the water inlet 202 is disposed in the first annular sealing portion 206, and the water outlet 403 is disposed in the second annular sealing portion 410.

[0046] In this embodiment, the end of the first connecting part 201 is provided with a first annular sealing part 206, and the bottom of the second connecting part 401 is provided with a second annular sealing part 410. Through the cooperation of the first annular sealing part 206 and the second annular sealing part 410, the sealing between the water inlet 202 and the water outlet 403 is ensured, further enhancing the reliability of the water filtration equipment.

[0047] In a further embodiment of this invention, a third annular sealing part 411 is provided at the bottom of the snap-fit ​​part 402, the water outlet 403 is disposed in the third annular sealing part 411, and the second end of the primary filter element 1 abuts against the third annular sealing part 411.

[0048] In this embodiment, by providing the third annular sealing part 411, the sealing between the primary filter element 1 and the snap-fit ​​part 402 is ensured, preventing leakage and thus guaranteeing the purity of the water. Furthermore, since no other sealing components are provided, it is convenient to replace the primary filter element 1 when its lifespan expires. The user only needs to remove the connecting cover 4 to easily remove the old primary filter element 1 and replace it with a new one, without needing to disassemble or install other sealing components, thus improving the convenience of disassembly and assembly.

[0049] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. Furthermore, the described specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0051] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A composite water purification filter cartridge, characterized by, include: A primary filter element, wherein an end cap is provided at the first end of the primary filter element; A filter element mounting cylinder, wherein a secondary filter element is provided inside the filter element mounting cylinder, a first connecting part is provided at the first end of the filter element mounting cylinder, a water inlet is provided at the first end of the filter element mounting cylinder, and a water outlet is provided at the second end of the filter element mounting cylinder; The connecting cover has a second connecting part, a snap-fit ​​part, and a water inlet. The snap-fit ​​part snaps into the second end of the primary filter element, and the water inlet communicates with the water inlet. The first connecting part and the second connecting part are detachably connected. The primary filter element and the filter element mounting cylinder are detachably connected through the connecting cover. The primary filter element and the filter element mounting cylinder are coaxially arranged.

2. The composite water filter cartridge of claim 1, wherein The outer side wall of the first connecting part is provided with a connecting protrusion, and the inner side wall of the second connecting part is provided with a connecting groove. The first connecting part is inserted into the second connecting part, and the connecting protrusion is engaged in the connecting groove so that the first connecting part and the second connecting part can be detachably connected.

3. The composite water filter cartridge of claim 2, wherein The connecting protrusion is a strip-shaped connecting protrusion, which is disposed on the outer side wall of the first connecting part along the circumferential direction of the first connecting part, and the connecting groove is disposed on the inner side wall of the second connecting part along the circumferential direction of the second connecting part.

4. The composite water filter cartridge of claim 3, wherein One end of the connecting groove is provided with an opening, and the other end of the connecting groove is provided with a positioning part, and one end of the connecting protrusion abuts against the positioning part.

5. The composite water filter cartridge of claim 4, wherein The inner wall of the connecting groove is provided with a limiting recess, and the outer wall of the connecting protrusion is provided with a limiting protrusion. The limiting recess and the limiting protrusion are in a convex-concave fit.

6. The composite water filter cartridge of claim 1, wherein The inner wall of the snap-fit ​​part is provided with several protruding ribs, the primary filter element is inserted into the snap-fit ​​part, and the primary filter element abuts against the protruding ribs.

7. The composite water filter cartridge of claim 6, wherein The ribs are arranged along the axial direction of the snap-fit ​​portion, and a plurality of the ribs are evenly distributed along the circumference of the snap-fit ​​portion on the inner sidewall of the snap-fit ​​portion.

8. The composite water purification filter element according to claim 7, characterized in that, The opening of the snap-fit ​​part is provided with a guide cone surface.

9. The composite water filter cartridge of claim 1, wherein The first connecting part has a first annular sealing part at its end, and the second connecting part has a second annular sealing part at its bottom. The water inlet is located inside the first annular sealing part, and the water outlet is located inside the second annular sealing part.

10. The composite water filter cartridge of claim 9, wherein, The bottom of the snap-fit ​​part is provided with a third annular sealing part, the water outlet is located in the third annular sealing part, and the second end of the primary filter element abuts against the third annular sealing part.

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