Pretreatment filter element and composite filter element

Abstract

The utility model discloses a pretreatment filter element and a composite filter element, the pretreatment filter element comprises: a first end cover assembly, which comprises a first cover body and a first central pipe, one end of the first central pipe is connected to the inner side of the first cover body; the second end cover assembly comprises a second cover body and a second central pipe, and the second central pipe is connected with the second cover body; the opposite ends of the first central pipe and the second central pipe are connected to form a pretreatment central pipe; the pretreatment filter material is arranged on the pretreatment central pipe in a sleeving or winding manner. The pretreatment filter element is higher in integration level, smaller in size and better in filtering effect.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically to a pretreatment filter element and a composite filter element. Background Technology

[0002] Most existing water purifiers use a three-stage filtration system: a pre-treatment filter, a reverse osmosis filter, and a post-filter. The pre-treatment filter, typically made of materials like PP cotton or ceramic, primarily filters large particles and suspended solids such as sand and dirt, reducing the workload on subsequent filters and extending their lifespan. Currently, pre-treatment filters are often integrated with other filters to form a composite filter, thus placing higher demands on integration and miniaturization. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this utility model proposes a pretreatment filter element and a composite filter element. The pretreatment filter element has higher integration and miniaturization, and achieves modularity, adapting to the development trend of water purifiers.

[0004] To achieve the above objectives, the pretreatment filter element of this utility model includes: a first end cap assembly, which includes a first cover body and a first central tube, one end of the first central tube being connected to the inner side of the first cover body; a second end cap assembly, which includes a second cover body and a second central tube, the second central tube being connected to the second cover body; the opposite ends of the first central tube and the second central tube being connected to form a pretreatment central tube; and pretreatment filter material, which is sleeved or wound on the pretreatment central tube.

[0005] In one embodiment, the pretreatment filter element has an inlet and an outlet, which are located at the same end of the pretreatment filter element.

[0006] In one embodiment, the second central tube passes through the second cover, with one end located on the outside of the second cover forming an inlet.

[0007] In one embodiment, the water outlet is disposed on the second cover and arranged around the water inlet.

[0008] In one embodiment, an axially extending first rib is provided on the outer circumferential wall of the first central tube, and an axially extending second rib is provided on the outer circumferential wall of the second central tube. In the connected state, the first rib and the second rib correspond one-to-one.

[0009] In one embodiment, the second rib extends to the outlet, such that the space between adjacent second ribs is connected to the outlet.

[0010] In one embodiment, the water inlet channel of the pretreatment filter element includes a first water passage, a second water passage, and a third water passage that are interconnected. The first water passage is formed inside the pretreatment central tube, the second water passage is located between the top of the first cover and the housing where the pretreatment filter element is located, and the third water passage is located between the inner wall of the housing and the outer side of the pretreatment filter material.

[0011] In one embodiment, the water outlet channel of the pretreatment filter element is formed between the inner side of the pretreatment filter media and the outer side of the pretreatment center tube.

[0012] In one embodiment, the pretreatment filter media is PP cotton, carbon fiber, or a composite filter media of PP cotton and carbon fiber.

[0013] This utility model also proposes a composite filter element, which includes the pre-treatment filter element as described above.

[0014] Beneficial effects:

[0015] (1) The pretreatment filter element of this utility model has a compact structure and small size, and has a higher degree of integration, which is conducive to reducing the size of the entire water purifier product and adapting to the development trend of water purifiers.

[0016] (2) The pretreatment filter element of this utility model has a modular design, which can realize modular automated assembly, thereby improving production efficiency.

[0017] (3) The structural design of the pretreatment filter element of this utility model makes the carbon fiber composite filter element have a larger specific area, higher adsorption capacity, faster adsorption and desorption speed, and better purification effect. Attached Figure Description

[0018] The present invention will be further described and explained below with reference to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional schematic diagram of the pretreatment filter element of the preferred embodiment of this utility model.

[0020] Figure 2 yes Figure 1 Exploded view of the pretreatment filter element.

[0021] Figure 3 yes Figure 2 A three-dimensional schematic diagram of the second end cap assembly.

[0022] Figure 4 This is a three-dimensional schematic diagram of the second end cap assembly from another angle.

[0023] Figure 5 This is a schematic diagram of the first end cap assembly and the second end cap assembly after assembly.

[0024] Figure 6This is a cross-sectional view of the pretreatment filter cartridge.

[0025] Figure 7 This is a cross-sectional view of the pretreatment filter cartridge being installed in the housing.

[0026] Figure label:

[0027] 10 Pretreatment filter element; 1 First end cap assembly; 2 Second end cap assembly; 3 Pretreatment filter media; 4 Housing; 5 Sleeve; 6 Inlet channel; 7 Outlet channel; 10a Inlet; 10b Outlet; 11 First cover; 12 First central tube; 20 Pretreatment central tube; 21 Second cover; 22 Second central tube; 120 First inner hole; 121 First rib; 220 Second inner hole; 221 Second rib; 221a Small segment; 61 First water passage channel; 62 Second water passage channel; 63 Third water passage channel. Detailed Implementation

[0028] The technical solution of this utility model will be more clearly and completely explained below with reference to the accompanying drawings and through the description of the preferred embodiments of this utility model.

[0029] like Figure 1 and Figure 2 As shown, the pretreatment filter element 10 proposed in this utility model includes a first end cap assembly 1, a second end cap assembly 2, and a pretreatment filter material 3. The first end cap assembly 1 and the second end cap assembly 2 are assembled together to form a support for the pretreatment filter material 3.

[0030] The pretreatment filter element 10 has an inlet 10a and an outlet 10b. The inlet 10a allows the raw water to be filtered to enter the pretreatment filter element from the inlet 10a, and the outlet 10b allows the filtered water to flow out of the pretreatment filter element.

[0031] The first end cap assembly 1 includes a first cap body 11 and a first central tube 12. One end of the first central tube 12 is connected to the inner side of the first cap body 11 and extends axially from the inner side of the first cap body 11. The first central tube 12 has a first inner hole 120 that extends from the first central tube 12 to the first cap body 11 and penetrates the first cap body 11 to form a through hole. An axially extending first rib 121 is provided on the outer circumferential wall of the first central tube 12.

[0032] like Figure 3 and Figure 4As shown, the second end cap assembly 2 includes a second cap body 21 and a second central tube 22, with the second central tube 22 connected to the second cap body 21. Preferably, one end of the second central tube 22 passes through the second cap body 21, and this end protruding from the outside of the second cap body 21 forms the inlet 10a of the pretreatment filter cartridge. The second central tube 22 has a second inner hole 220 that extends through the entire second central tube 22, thus communicating with the inlet 10a. In other embodiments, the tube containing the inlet 10a can also be a separate part connected to the second cap body 21, rather than formed on the second central tube 22, as long as the inlet can communicate with the second inner hole 220 of the second central tube 22 to achieve the purpose of conveying raw water to the pretreatment filter cartridge 10.

[0033] The outlet 10b of the pretreatment filter element 10 is located on the second cover 21. Specifically, multiple outlets 10b are arranged in a circle around the inlet 10a. Therefore, in this utility model, the inlet 10a and outlet 10b of the pretreatment filter element are located at the same end.

[0034] A second rib 221 extending axially is provided on the outer circumferential wall of the second central tube 22. One end of the second rib 221 extends to the inner side of the second cover 21, and the space between two adjacent second ribs 221 corresponds to and is connected to the water outlet 10b, so that the filtered water can flow smoothly to the water outlet 10b under the guidance of the second ribs 221. In this utility model, "inner side" refers to the side opposite to the first end cap assembly 1 and the second end cap assembly 2, and conversely, the side opposite to each other is "outer side".

[0035] Furthermore, at one end of the second rib 221 near the second cover 21, its dimension along the diameter direction of the second central tube 22 is reduced, forming a small segment 221a, so that each second rib 221 is stepped. A sleeve 5 is connected to the outside of the small segment 221a. The height of the sleeve 5 is equal to the length of the small segment 221a, and the inner diameter of the sleeve 5 is equal to the diameter of the circle on the outside of the small segment 221a. Therefore, the fit between the sleeve 5 and the small segment 221a serves two purposes: firstly, it connects the second central tube 22 to the second cover 21; secondly, it supports and reinforces the second central tube 22, thereby improving the stability of the second end cap assembly 2.

[0036] like Figure 5 and Figure 6As shown, when the first end cap assembly 1 and the second end cap assembly 2 are assembled, the opposite ends of the first central tube 12 and the second central tube 22 are connected to form a pretreatment central tube 20. The first inner hole 120 and the second inner hole 220 are connected. The pretreatment filter material 3 is sleeved or wound on the pretreatment central tube 20 to form a pretreatment filter element 10. In this assembled state, the first rib 121 and the second rib 221 form a water passage, thereby guiding the water outside the pretreatment central tube 20.

[0037] The pretreatment filter media 3 can be PP cotton, carbon fiber, or a composite filter media of PP cotton and carbon fiber.

[0038] like Figure 7 As shown, when the pretreatment filter element 10 is installed inside the housing 4, it has an inlet channel 6 and an outlet channel 7. Specifically, the inlet channel includes a first water passage 61, a second water passage 62, and a third water passage 63 that are interconnected. The first water passage 61 is formed inside the pretreatment central tube 20, the second water passage 62 is located between the first cover 11 and the top of the housing 4, and the third water passage 63 is located between the inner wall of the housing 4 and the outer side of the pretreatment filter material 3. This inlet channel allows the raw water to be filtered to enter from the inlet 10a and flow sequentially along the first water passage 61, the second water passage 62, and the third water passage 63 until it reaches the outer side of the pretreatment filter material 3, where it is filtered by the pretreatment filter material 3.

[0039] The water outlet channel 7 of the pretreatment filter element 10 is formed between the inner side of the pretreatment filter material 3 and the outer side of the pretreatment center tube 20, and is connected to the water outlet 10b, so that the water filtered by the pretreatment filter material 3 flows to the water outlet 10b under the guidance of the first rib 121 and the second rib 221, and then flows out of the pretreatment filter element 10.

[0040] This utility model also proposes a composite filter element, which includes the pretreatment filter element 10 as described above.

[0041] The above-described specific embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications, substitutions, and improvements made by those skilled in the art to the technical solutions of the present invention based on the provided description and drawings, without departing from the design concept and spirit of the present invention, should all fall within the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.

Claims

1. A pretreatment filter element, characterized in that, include: The first end cap assembly includes a first cap body and a first central tube, one end of the first central tube being connected to the inner side of the first cap body; The second end cap assembly includes a second cap body and a second central tube, wherein the second central tube is connected to the second cap body; The first central tube and the second central tube are connected at opposite ends to form a pretreatment central tube; Pretreatment filter media, which is sleeved or wound around the pretreatment central tube.

2. The pretreatment filter element as described in claim 1, characterized in that, The pretreatment filter element has an inlet and an outlet, which are located at the same end of the pretreatment filter element.

3. The pretreatment filter element as described in claim 2, characterized in that, The second central tube passes through the second cover, and its end located on the outside of the second cover forms the water inlet.

4. The pretreatment filter element as described in claim 3, characterized in that, The water outlet is located on the second cover and is arranged around the water inlet.

5. The pretreatment filter element as described in claim 4, characterized in that, The outer circumferential wall of the first central tube is provided with an axially extending first rib, and the outer circumferential wall of the second central tube is provided with an axially extending second rib.

6. The pretreatment filter element as described in claim 5, characterized in that, The second rib extends to the outlet, such that the space between adjacent second ribs is connected to the outlet.

7. The pretreatment filter element as described in claim 6, characterized in that, The water inlet channel of the pretreatment filter element includes a first water passage, a second water passage, and a third water passage that are interconnected. The first water passage is formed inside the pretreatment center tube. The second water passage is located between the top of the first cover and the shell containing the pretreatment filter element. The third water passage is located between the inner wall of the shell and the outer side of the pretreatment filter material.

8. The pretreatment filter element as described in claim 7, characterized in that, The water outlet channel of the pretreatment filter element is formed between the inner side of the pretreatment filter material and the outer side of the pretreatment center tube.

9. The pretreatment filter element as described in claim 1, characterized in that, The pretreatment filter material is PP cotton, carbon fiber, or a composite filter material of PP cotton and carbon fiber.

10. A composite filter element, characterized in that, Includes the pretreatment filter element as described in any one of claims 1 to 9.

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