A composite filter element for water purifiers

Abstract

This utility model relates to a composite filter element for a water purifier, comprising: a filter element body and an adjustable top cover; the bottom of the filter element body is provided with a connecting bottom cover, and the top of the filter element body is provided with an adjustable top cover, the adjustable top cover being used to adjust the length of the entire filter element. This utility model, by setting up components such as a connecting bottom cover, a sealing top cover, a threaded cylinder, and a connecting cover, uses the connecting bottom cover and the sealing top cover to cooperate with the filter element body, so that the top of the filter element body is in a sealed state. Liquid outside the filter element body is filtered by the filter element body and discharged from the connecting cylinder, i.e., the filtered water is discharged. By twisting the threaded cylinder, it moves away from the connecting bottom cover under the action of the thread, i.e., the threaded cylinder and the connecting cover rise together, thereby achieving the effect of changing the overall length of the filter element. The use of pressure components and springs ensures sufficient pressure is provided.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically to a composite filter for a water purifier. Background Technology

[0002] Household water purifier filter cartridges (hereinafter referred to as filter cartridges) are the core components of water purifiers. Their function is to remove impurities and pollutants from the water through different filtration technologies to improve water quality.

[0003] When in use, the filter cartridge needs to be placed inside the filter cartridge housing and connected to the water purifier through the housing. The filter cartridge is usually fixed inside the housing by compression. However, filter cartridges on the market vary in size, with some being of different lengths. Shorter cartridges cannot be compressed properly inside the housing, making them prone to shaking under water flow and potentially causing damage to the filter media, thus affecting filtration efficiency. Therefore, a composite filter cartridge for water purifiers is proposed to address these issues. Utility Model Content

[0004] Based on the above description, this utility model provides a composite filter element for a water purifier to solve the problem that a shorter filter element cannot be pressed and fixed when installed inside the filter element housing.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A composite filter element for a water purifier, comprising: a filter element body and an adjustable top cover; The bottom of the filter element body is provided with a connecting bottom cover, and the top of it is provided with an adjustable top cover, which is used to adjust the length of the entire filter element.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, a water-permeable hole is provided at the center of the upper surface of the filter element body. The connecting bottom cover includes a main cover body, which is sleeved on the outside of the bottom end of the filter element body and has a connecting hole on its lower surface. The connecting hole communicates with the water-permeable hole. A connecting cylinder is provided at the center of the side of the main cover body facing the filter element body. The connecting cylinder communicates with the connecting hole and extends into the interior of the water-permeable hole.

[0008] Furthermore, the adjustable top cover includes a sealing top cover, which is sleeved on the outside of the top of the filter element body and includes, from top to bottom, a sealing cover body, a connecting middle cylinder and an external threaded cover body. The surface of the sealing cover body facing the connecting bottom cover is in close contact with the upper surface of the filter element body.

[0009] Furthermore, the inner diameter of the sealing cap is consistent with the outer diameter of the filter element body, and the outer diameters of the upper and lower ends of the connecting cylinder are consistent with the outer diameters of the sealing cap and the external threaded cap, respectively. The inner diameter of the external threaded cap is larger than the outer diameter of the filter element body, and there is a gap between it and the outer surface of the filter element body.

[0010] Furthermore, the external threaded cap is connected to a threaded cylinder, which includes an internal threaded cylinder body. The inner surface of the internal threaded cylinder body is provided with threads that are compatible with the external threaded cap body. An external threaded connecting cylinder is provided at the top of the internal threaded cylinder body, and the outer diameter of the external threaded connecting cylinder is smaller than the outer diameter of the internal threaded cylinder body.

[0011] Furthermore, a connecting cap is fitted onto the outside of the threaded cylinder. The connecting cap includes an internally threaded cap body that is threadedly connected to the externally threaded connecting cylinder. The upper surface of the internally threaded cap body is provided with a plurality of guide holes, which are distributed equidistantly in a ring along the outer edge of the upper surface of the internally threaded cap body. A rubber gasket is provided between the internally threaded cap body and the internally threaded cylinder body. The rubber gasket is fitted onto the outside of the externally threaded connecting cylinder body, and its upper and lower surfaces are respectively in close contact with the lower surface of the internally threaded cap body and the upper surface of the internally threaded cylinder body.

[0012] Furthermore, a spring is provided between the external threaded connecting cylinder and the internal threaded cover body. The spring is sleeved on the outside of the sealing top cover, and one end is tightly fitted with the upper surface of the external threaded connecting cylinder. A pressure component is provided at the top of the spring.

[0013] Furthermore, the pressure assembly includes a movable ring plate, which is sleeved on the outside of the sealing top cover, and its lower surface is tightly fitted with one end of the spring. The upper surface of the movable ring plate is provided with a plurality of connecting vertical rods, which pass through the guide hole and extend to the top of the internal thread cover. The top end of the connecting vertical rod is provided with a contact plate.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. This utility model, by setting up components such as a connecting bottom cover, a sealing top cover, a threaded cylinder, and a connecting cover, uses the connecting bottom cover and the sealing top cover to cooperate with the filter element body so that the top of the filter element body is in a sealed state. Liquid located outside the filter element body is filtered by the filter element body and discharged from the connecting cylinder, that is, the filtered water is discharged. By twisting the threaded cylinder, it is moved away from the connecting bottom cover under the action of the thread, that is, the threaded cylinder and the connecting cover are lifted together, thereby achieving the effect of changing the overall length of the filter element. 2. By setting the pressure component and spring, sufficient pressure is provided so that when the overall length of the filter element is adjusted and installed inside the filter element housing for pressing, the pressure component is pressed first. At this time, the pressure component moves downward to squeeze the spring, causing the spring to generate a reverse elastic force. On the one hand, it can automatically adapt to the internal size of the filter element housing to a certain extent, making up for the defect of insufficient length adjustment. On the other hand, the elastic force generated by the spring can increase the stability of the filter element during installation. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of a composite filter element for a water purifier provided in an embodiment of this utility model; Figure 2 for Figure 1 Structural sectional view; Figure 3 for Figure 2 Another structural diagram from another perspective; Figure 4 for Figure 3 A magnified view of a portion of region A in the middle; Figure 5 This is a schematic diagram of the structure of the connecting bottom cover in an embodiment of this utility model; Figure 6 This is an exploded view of the connection structure between the threaded cylinder and the connecting cover in an embodiment of this utility model; Figure 7 This is a cross-sectional view of the connection structure between the threaded cylinder and the connecting cover in an embodiment of this utility model; Figure 8 for Figure 7 Another structural diagram from a different perspective; Figure 9 This is a schematic diagram of the sealing top cover in an embodiment of the present utility model; Figure 10 This is a schematic diagram of the pressure component in an embodiment of the present invention; The attached diagram lists the components represented by each number as follows: 1. Filter element body; 2. Connecting bottom cover; 21. Main cover body; 22. Connecting cylinder; 3. Threaded cylinder; 31. Internal threaded cylinder body; 32. External threaded connecting cylinder; 4. Connecting cover; 41. Internal threaded cover body; 42. Guide hole; 5. Sealing top cover; 51. External threaded cover body; 52. Connecting middle cylinder; 53. Sealing cover body; 6. Spring; 7. Pressure assembly; 71. Movable ring plate; 72. Connecting vertical rod; 73. Contact plate; 8. Rubber gasket. Detailed Implementation

[0016] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0018] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0019] Please see Figure 1 A composite filter element for a water purifier includes: a filter element body 1 and an adjustable top cover; The bottom of the filter element body 1 is provided with a connecting bottom cover 2, and the top of it is provided with an adjustable top cover, which is used to adjust the length of the entire filter element. Based on the above, the filter element body 1 is a composite filter element in the prior art, which is used to filter water. The adjustable top cover cooperates with the filter element body 1. By adjusting the adjustable top cover, the length of the filter element can be extended, thereby changing the length of the entire filter element to adapt to the filter element housing.

[0020] like Figure 2 , Figure 3 as well as Figure 5 As shown, a water-permeable hole is provided at the center of the upper surface of the filter element body 1. The connecting bottom cover 2 includes a main cover body 21, which is sleeved on the outside of the bottom end of the filter element body 1 and has a connecting hole on its lower surface. The connecting hole is connected to the water-permeable hole. A connecting cylinder 22 is provided at the center of the main cover body 21 facing the filter element body 1. The connecting cylinder 22 is connected to the connecting hole and extends into the interior of the water-permeable hole. Based on the above, the connecting bottom cover 2 serves to limit the bottom of the filter element body 1 while allowing the water filtered by the filter element body 1 to be discharged from the connecting cylinder 22.

[0021] like Figure 2 , Figure 3 as well as Figure 9 As shown, the adjustable top cover includes a sealing top cover 5, which is sleeved on the outside of the top of the filter element body 1, and from top to bottom includes a sealing cover body 53, a connecting middle cylinder 52, and an external threaded cover body 51. The surface of the sealing cover body 53 facing the connecting bottom cover 2 is tightly fitted with the upper surface of the filter element body 1. The inner diameter of the sealing cover 53 is the same as the outer diameter of the filter element body 1. The outer diameters of the upper and lower ends of the connecting cylinder 52 are the same as the outer diameters of the sealing cover 53 and the outer diameter of the external thread cover 51, respectively. The inner diameter of the external thread cover 51 is larger than the outer diameter of the filter element body 1, and there is a gap between it and the outer surface of the filter element body 1. Based on the above, the sealing top cover 5 serves to seal the top of the filter element body 1 on the one hand, and on the other hand, the gap between it and the filter element body 1 allows water to contact the circumferential surface of the filter element body 1. That is, after the sealing top cover 5 is installed, it can minimize the obstruction of the surface area of ​​the filter element body 1 by the sealing top cover 5. The external threaded cover 51 allows the sealing top cover 5 to be threadedly connected to the threaded cylinder 3. By rotating the threaded cylinder 3, it can move upward under the action of the thread, thereby changing the length of the filter element.

[0022] like Figures 2-4 , Figures 6-8 As shown, the external threaded cover 51 is connected to a threaded cylinder 3 by an external thread. The threaded cylinder 3 includes an internal threaded cylinder 31. The inner surface of the internal threaded cylinder 31 is provided with a thread. The thread is adapted to the external threaded cover 51. An external threaded connecting cylinder 32 is provided at the top of the internal threaded cylinder 31. The outer diameter of the external threaded connecting cylinder 32 is smaller than the outer diameter of the internal threaded cylinder 31. A connecting cover 4 is sleeved on the outside of the threaded cylinder 3. The connecting cover 4 includes an internal threaded cover body 41 that is threadedly connected to the external threaded connecting cylinder 32. The upper surface of the internal threaded cover body 41 is provided with a plurality of guide holes 42. The plurality of guide holes 42 are distributed in a ring at equal intervals along the outer edge of the upper surface of the internal threaded cover body 41. A rubber gasket 8 is provided between the internal threaded cover body 41 and the internal threaded cylinder 31. The rubber gasket 8 is sleeved on the outside of the external threaded connecting cylinder 32, and its upper and lower surfaces are respectively in close contact with the lower surface of the internal threaded cover body 41 and the upper surface of the internal threaded cylinder 31. Based on the above, after the threaded cylinder 3 and the connecting cover 4 are connected to each other by a threaded connection, when the threaded cylinder 3 is lifted upward, it can drive the connecting cover 4 to be lifted together. The setting of the rubber gasket 8 makes the connection between the two more stable. The external threaded connecting cylinder 32 not only serves to connect to the threaded connection 4, but also supports the spring 6, allowing the spring 6 to rise together with the threaded cylinder 3. The guide hole 42 works in conjunction with the connecting vertical rod 72, so that the pressure component 7 can only move vertically.

[0023] like Figures 2-4 As shown, a spring 6 is provided between the external threaded connecting cylinder 32 and the internal threaded cover body 41. The spring 6 is sleeved on the outside of the sealing top cover 5, and one end is tightly fitted with the upper surface of the external threaded connecting cylinder 32. A pressure component 7 is provided at the top of the spring 6. like Figure 10 As shown, the pressure assembly 7 includes a movable ring plate 71, which is sleeved on the outside of the sealing top cover 5, and its lower surface is tightly fitted with one end of the spring 6. The upper surface of the movable ring plate 71 is provided with a plurality of connecting vertical rods 72, which pass through the guide hole 42 and extend to the top of the internal thread cover body 41. The top end of the connecting vertical rod 72 is provided with a contact plate 73. Based on the above, the pressure component 7 and the spring 6 cooperate with each other so that when the filter element is pressed by the filter element shell, the contact plate 73 first contacts the filter element shell and moves downward. During this process, the spring 6 is compressed and generates a reverse elastic force. On the one hand, the filter element can automatically adapt to small length changes. On the other hand, the reverse elastic force can increase the friction between the filter element and the filter element shell, thereby increasing the stability after installation.

[0024] In summary, the adjustable top cover of this filter cartridge features a threaded adjustment structure that allows for flexible adjustment of the overall length of the filter cartridge. This makes it compatible with filter cartridge housings of different brands and models of water purifiers, solving the universality problem of traditional filter cartridges that use only one housing and one cartridge. This reduces user replacement costs and improves ease of use. The design of the pressure assembly 7 and the spring 6 works in two ways. First, the elastic restoring force of the spring 6 automatically compensates for dimensional deviations between the filter element and the outer shell, ensuring a tight fit even with minor errors in length adjustment. Second, the continuous clamping force generated by the spring 6 effectively prevents the filter element from loosening under water flow impact or temperature changes, preventing leakage of unfiltered water and ensuring the quality of the output water. Furthermore, the entire adjustment and installation process requires no special tools; users can adjust the length simply by manually turning the threaded cylinder and secure it by tightening the end cap as usual. This convenient operation makes it suitable for home users to replace and maintain the filter themselves. All components are made of food-grade materials, meeting drinking water safety standards and ensuring safe and reliable use.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 composite filter element for a water purifier, characterized in that, include: Filter cartridge body (1) and adjustable top cover; The bottom of the filter element body (1) is provided with a connecting bottom cover (2), and the top of it is provided with an adjustable top cover, which is used to adjust the length of the entire filter element.

2. The composite filter element for a water purifier according to claim 1, characterized in that, A water-permeable hole is provided at the center of the upper surface of the filter element body (1). The connecting bottom cover (2) includes a main cover body (21). The main cover body (21) is sleeved on the outside of the bottom end of the filter element body (1), and a connecting hole is provided on the lower surface. The connecting hole is connected to the water-permeable hole. A connecting cylinder (22) is provided at the center of the main cover body (21) facing the filter element body (1). The connecting cylinder (22) is connected to the connecting hole and extends into the interior of the water-permeable hole.

3. The composite filter element for a water purifier according to claim 1, characterized in that, The adjustable top cover includes a sealing top cover (5), which is sleeved on the outside of the top of the filter element body (1) and includes a sealing cover body (53), a connecting middle cylinder (52) and an external threaded cover body (51) from top to bottom. The surface of the sealing cover body (53) facing the connecting bottom cover (2) is tightly fitted with the upper surface of the filter element body (1).

4. The composite filter element for a water purifier according to claim 3, characterized in that, The inner diameter of the sealing cap (53) is consistent with the outer diameter of the filter element body (1). The outer diameters of the upper and lower ends of the connecting cylinder (52) are consistent with the outer diameters of the sealing cap (53) and the outer diameter of the external thread cap (51), respectively. The inner diameter of the external thread cap (51) is larger than the outer diameter of the filter element body (1), and there is a gap between it and the outer surface of the filter element body (1).

5. The composite filter element for a water purifier according to claim 3, characterized in that, The external threaded cover (51) is connected to a threaded cylinder (3) by an external thread. The threaded cylinder (3) includes an internal threaded cylinder body (31). The inner surface of the internal threaded cylinder body (31) is provided with a thread. The thread is adapted to the external threaded cover (51). An external threaded connecting cylinder (32) is provided at the top of the internal threaded cylinder body (31). The outer diameter of the external threaded connecting cylinder (32) is smaller than the outer diameter of the internal threaded cylinder body (31).

6. The composite filter element for a water purifier according to claim 5, characterized in that, The threaded cylinder (3) is fitted with a connecting cover (4). The connecting cover (4) includes an internal threaded cover body (41) that is threadedly connected to the external threaded connecting cylinder (32). The upper surface of the internal threaded cover body (41) is provided with a plurality of guide holes (42). The plurality of guide holes (42) are distributed in an annular and equidistant manner along the outer edge of the upper surface of the internal threaded cover body (41). A rubber gasket (8) is provided between the internal threaded cover body (41) and the internal threaded cylinder (31). The rubber gasket (8) is fitted on the outside of the external threaded connecting cylinder (32), and its upper and lower surfaces are tightly fitted to the lower surface of the internal threaded cover body (41) and the upper surface of the internal threaded cylinder (31), respectively.

7. The composite filter element for a water purifier according to claim 6, characterized in that, A spring (6) is provided between the external threaded connecting cylinder (32) and the internal threaded cover (41). The spring (6) is sleeved on the outside of the sealing top cover (5), and one end is tightly fitted to the upper surface of the external threaded connecting cylinder (32). A pressure component (7) is provided at the top of the spring (6).

8. The composite filter element for a water purifier according to claim 7, characterized in that, The pressure assembly (7) includes a movable ring plate (71), which is sleeved on the outside of the sealing top cover (5) and its lower surface is tightly fitted with one end of the spring (6). The upper surface of the movable ring plate (71) is provided with a plurality of connecting vertical rods (72), which pass through the guide hole (42) and extend to the top of the internal thread cover (41). The top end of the connecting vertical rod (72) is provided with a contact plate (73).

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