A filter element with a multi-layer gradient filtration structure

Abstract

This utility model relates to the field of filter cartridge technology, specifically to a filter cartridge with a multi-layer gradient filtration structure. It includes a housing, a filter section internally threadedly connected to the housing, a water distribution plate fixedly connected to the top of the filter section, a control hole at the center of the surface of the water distribution plate, and several sets of water distribution holes on the surface of the water distribution plate, with the diameter of the control hole being larger than that of the water distribution holes. A PP cotton filter layer, an activated carbon filter layer, and a ceramic filter layer are fixedly connected to the inner wall of the filter section. This utility model, through the cooperation of the housing and the filter section, and by setting up a PP cotton filter layer, an activated carbon filter layer, and a ceramic filter layer with progressively increasing filtration precision from top to bottom, constitutes a scientifically sound physical gradient filtration system. Each filter layer is effective against specific pollutants, effectively preventing the highest precision ceramic filter layer from being prematurely clogged by large particulate pollutants.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically to a filter element with a multi-layer gradient filtration structure. Background Technology

[0002] With the improvement of people's living standards and the enhancement of health awareness, the requirements for the quality of daily drinking water are increasing. Household and commercial water purification equipment has become a key device to ensure drinking water safety and health, and its core efficiency largely depends on the performance of the filter element. Traditional filter elements mostly use a single filter material or a simple multi-layer stacked structure, which has obvious limitations.

[0003] For example, a single filter cartridge has limited functionality and cannot simultaneously handle particulate matter interception, adsorption purification, and fine filtration. Simple multi-layered structures are often poorly designed; if high-precision filter media is placed at the front of the water flow, large particles will quickly clog it, leading to a sharp increase in filtration resistance, a drastic decrease in water production, and a short lifespan. If coarse filter media is placed at the rear, it fails to provide protection, resulting in overall low filter cartridge efficiency. Furthermore, conventional filter cartridges typically focus only on basic purification functions, lacking optimization of water taste and supplementation of beneficial minerals, making it difficult to meet users' comprehensive needs for high-quality drinking water. At the same time, most filter cartridges have uneven internal flow distribution, easily causing water flow short-circuiting or localized blockages, failing to maximize the utilization of the effective filtration area, and having limited dirt-holding capacity.

[0004] Therefore, it is necessary to invent a filter element with a multi-layer gradient filtration structure to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a filter element with a multi-layer gradient filtration structure, which improves the filtration effect through the cooperation of the outer shell and filter parts, thereby solving the problems of uneven internal flow field distribution, water flow short circuit or local blockage, failure to maximize the utilization of effective filtration area, and limited dirt holding capacity in most existing filter elements.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a filter element with a multi-layer gradient filtration structure, comprising a shell, a filter part internally threadedly connected to the shell, a water distribution plate fixedly connected to the top of the filter part, a control hole centrally located on the surface of the water distribution plate, and several sets of water distribution holes on the surface of the water distribution plate, wherein the diameter of the control hole is larger than that of the water distribution holes, a PP cotton filter layer fixedly connected to the inner sidewall of the filter part, an activated carbon filter layer fixedly connected to the inner sidewall of the filter part, and a ceramic filter element filter layer fixedly connected to the inner sidewall of the filter part, wherein the PP cotton filter layer, the activated carbon filter layer, and the ceramic filter element filter layer are arranged from top to bottom, and the mesh size of the PP cotton filter layer, the activated carbon filter layer, and the ceramic filter element filter layer decreases sequentially, thereby forming gradient filtration by utilizing the cooperation of the PP cotton filter layer, the activated carbon filter layer, and the ceramic filter element filter layer.

[0007] Preferably, a first filter media layer is provided between the PP cotton filter layer and the activated carbon filter layer. The interior of the first filter media layer is filled with a microporous non-woven filter bag containing potassium feldspar particles to supplement trace elements in the water.

[0008] Preferably, a second filter layer is provided between the activated carbon filter layer and the ceramic filter layer, and the interior of the second filter layer is filled with coconut shell activated carbon to further improve the taste.

[0009] Preferably, the PP cotton filter layer, activated carbon filter layer, and ceramic filter element filter layer are all composed of a recessed portion, a guide ring portion, an upper protrusion portion, and a fixed connection portion, and the filtration area is further increased by utilizing the cooperation of the recessed portion and other parts.

[0010] Preferably, the fixed connection part is fixedly connected to the inner wall of the filter part, and the recessed part is fixedly connected to the inner wall of the fixed connection part, thereby initially increasing the filtration area through the recessed part.

[0011] Preferably, the guide ring is fixedly connected to the top of the lower recess, and the upper protrusion is fixedly connected to the inner wall of the lower recess, thereby guiding and increasing the filtration area using the guide ring and the upper protrusion.

[0012] Preferably, the surface of the outer shell is provided with a viewing groove and an observation window is installed, and the outer side of the filter part is provided with an observation groove, and the area of ​​the observation window overlaps with that of the observation groove, so that the filtration situation can be observed through the cooperation of the observation window and the observation groove.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows: Through the cooperation of the outer shell and the filter section, a scientifically sound physical gradient filtration system is formed by setting up a PP cotton filter layer, an activated carbon filter layer, and a ceramic filter layer with progressively increasing filtration precision from top to bottom. This achieves step-by-step purification from coarse to fine filtration. Each filter layer is effective against specific pollutants, with a clear division of labor, effectively preventing the highest precision ceramic filter layer from being prematurely clogged by large particles, thus significantly extending the overall service life of the filter element. Innovatively, a first filter layer and a second filter layer are embedded between the main filter layers, which, in addition to efficiently purifying the water, also provide the functions of mineralizing and supplementing trace elements and deeply improving the taste, meeting users' comprehensive needs for high-quality drinking water. The unique pleated structure design of each filter layer, through the cooperation of the concave part, the guide ring part, and the convex part, maximizes the effective filtration area within the limited filter space, resulting in slower water flow, lower flow resistance, and more thorough filtration at the same flow rate, while also meaning that it can accommodate more pollutants. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the filter section structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is a schematic diagram of the PP cotton filter layer structure of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Outer shell; 2. Filter section; 3. Water distribution plate; 4. Observation window; 5. Control hole; 6. Observation slot; 7. Water distribution hole; 8. PP cotton filter layer; 9. Activated carbon filter layer; 10. Ceramic filter element filter layer; 11. First filter material layer; 12. Second filter material layer; 13. Lower recess; 14. Guide ring; 15. Upper protrusion; 16. Fixing connection part. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] This utility model provides, for example Figure 1-4The filter element shown includes a multi-layer gradient filtration structure, comprising a housing 1, a filter section 2 internally threadedly connected to the housing 1, a water distribution plate 3 fixedly connected to the top of the filter section 2, a control hole 5 at the center of the surface of the water distribution plate 3, and several sets of water distribution holes 7 on the surface of the water distribution plate 3, wherein the diameter of the control hole 5 is larger than that of the water distribution holes 7. A PP cotton filter layer 8, an activated carbon filter layer 9, and a ceramic filter element layer 10 are fixedly connected to the inner wall of the filter section 2. The PP cotton filter layer 8, the activated carbon filter layer 9, and the ceramic filter element layer 10 are arranged from top to bottom. The layers are arranged in a descending order, with the mesh size of the PP cotton filter layer 8, activated carbon filter layer 9, and ceramic filter element layer 10 decreasing sequentially. The combination of the PP cotton filter layer 8, activated carbon filter layer 9, and ceramic filter element layer 10 forms a gradient filtration. A first filter layer 11 is set between the PP cotton filter layer 8 and the activated carbon filter layer 9. The interior of the first filter layer 11 is filled with a microporous non-woven filter bag containing potassium feldspar particles to supplement trace elements in the water. A second filter layer 12 is set between the activated carbon filter layer 9 and the ceramic filter element layer 10. The interior of the second filter layer 12 is filled with coconut shell activated carbon to further improve the taste.

[0019] Refer to the instruction manual appendix Figure 1-4The PP cotton filter layer 8, activated carbon filter layer 9, and ceramic filter element layer 10 are all composed of a recessed portion 13, a guide ring portion 14, an upper protrusion portion 15, and a fixed connection portion 16. The filtration area is further increased through the cooperation of the recessed portion 13 and other components. The fixed connection portion 16 is fixedly connected to the inner wall of the filter element 2. The recessed portion 13 is fixedly connected to the inner wall of the fixed connection portion 16, thus initially increasing the filtration area. The guide ring portion 14 is fixedly connected to the top of the recessed portion 13, and the upper protrusion portion 15 is fixedly connected to the inner wall of the recessed portion 13. The guide ring portion 14 and the upper protrusion portion 15 guide and increase the filtration area. A viewing groove and an observation window 4 are provided on the surface of the outer shell 1. An observation groove 6 is provided on the outer side of the filter element 2, and the areas of the observation window 4 and the observation groove 6 overlap. The filtration status is observed through the cooperation of the observation window 4 and the observation groove 6. Through the cooperation of the outer shell 1 and the filter element 2, and by setting PP cotton filters with progressively increasing filtration precision from top to bottom, the filtration process is improved. The cotton filter layer 8, activated carbon filter layer 9, and ceramic filter element layer 10 constitute a scientifically sound physical gradient filtration system, achieving step-by-step purification from coarse to fine filtration. Each filter layer is effective against specific pollutants, with a clear division of labor, effectively preventing the highest-precision ceramic filter element layer 10 from being prematurely clogged by large particulate pollutants, thus significantly extending the overall service life of the filter element. Innovatively, a first filter media layer 11 and a second filter media layer 12 are embedded between the main filter layers, which, in addition to efficiently purifying the water, also provide the functions of mineralizing and supplementing trace elements and deeply improving the taste, meeting the comprehensive needs of users for high-quality drinking water. The unique pleated structure design of each filter layer, through the cooperation of the lower recess 13, the guide ring 14, and the upper protrusion 15, maximizes the effective filtration area within the limited filter element space, resulting in slower water flow velocity, lower flow resistance, and more thorough filtration at the same flow rate, while also meaning that it can accommodate more pollutants.

[0020] The working principle of this practical application is as follows: Refer to the instruction manual appendix Figure 1-4The working principle of this utility model of a filter element with a multi-layer gradient filtration structure is as follows: The water to be filtered first enters the top of the outer shell 1, and is evenly distributed by the water distribution plate 3 at the top of the filter section 2. Several sets of water distribution holes 7 on the surface of the water distribution plate 3 can disperse the water flow and avoid the water flow concentrating and impacting local areas of the filter element. Meanwhile, the control hole 5 with a larger diameter at the center of its surface can ensure that sufficient core flow can pass through. The two work together to achieve a low flow resistance and uniform water distribution effect. The water flow then follows the direction from top to bottom under the action of gravity or external pressure. The gradient filtration path begins with the water flowing through the PP cotton filter layer 8, which has the largest mesh size. This layer acts as a coarse filter, effectively intercepting pollutants such as rust, silt, colloids, and larger suspended particles. The pre-purified water then enters the first filter layer 11. This layer, filled with microporous non-woven filter bags containing potassium feldspar particles, continuously and stably releases potassium and other beneficial trace elements during contact with the water, achieving a mineralization function. Afterward, the water flows into the activated carbon filter layer 9. This layer primarily relies on the large specific surface area and abundant... The rich porous structure efficiently adsorbs residual chlorine, discoloration, odor, and some dissolved organic matter in the water, significantly improving water quality. To further enhance the taste, the water flows through the second filter layer 12 before contacting the ceramic filter element 10. The coconut shell activated carbon filling this layer provides the final taste adjustment, adsorbing any potentially unpleasant taste substances. Finally, the water reaches the ceramic filter element 10, which boasts the highest filtration precision. Its extremely fine mesh thoroughly filters out any tiny particles and bacteria that failed to be removed in the previous steps, ensuring the quality of the output water. For clarity and safety, all filter layers are fixed to the inner wall of the filter section 2 via the fixed connection part 16. Through its unique pleated structure composed of the lower recess 13, the guide ring part 14 and the upper protrusion 15, the flow area of ​​water and the contact time with the filter media are greatly increased. This not only reduces filtration pressure loss, but also significantly improves dirt holding capacity and filtration efficiency. During the entire use process, the user can observe the changes in the filter element status in the area overlapping with the observation groove 6 through the observation window 4 on the outer shell 1, so as to intuitively judge the saturation level of the filter element and whether it needs to be replaced.

[0021] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A filter element with a multi-layer gradient filtration structure, comprising a housing (1), characterized in that: The outer shell (1) is internally threaded with a filter section (2). A water distribution plate (3) is fixedly connected to the top of the filter section (2). A control hole (5) is opened at the center of the surface of the water distribution plate (3). Several sets of water distribution holes (7) are opened on the surface of the water distribution plate (3), and the diameter of the control hole (5) is larger than that of the water distribution hole (7). A PP cotton filter layer (8) is fixedly connected to the inner wall of the filter section (2). An activated carbon filter layer (9) is fixedly connected to the inner wall of the filter section (2). A ceramic filter element filter layer (10) is fixedly connected to the inner wall of the filter section (2). The PP cotton filter layer (8), the activated carbon filter layer (9), and the ceramic filter element filter layer (10) are arranged from top to bottom, and the mesh size of the PP cotton filter layer (8), the activated carbon filter layer (9), and the ceramic filter element filter layer (10) decreases sequentially.

2. The filter element with a multi-layer gradient filtration structure according to claim 1, characterized in that: A first filter layer (11) is provided between the PP cotton filter layer (8) and the activated carbon filter layer (9), and the interior of the first filter layer (11) is filled with a microporous non-woven filter bag containing potassium feldspar particles.

3. The filter element with a multi-layer gradient filtration structure according to claim 1, characterized in that: A second filter layer (12) is provided between the activated carbon filter layer (9) and the ceramic filter element filter layer (10), and the interior of the second filter layer (12) is filled with coconut shell activated carbon.

4. A filter element with a multi-layer gradient filtration structure according to claim 1, characterized in that: The PP cotton filter layer (8), activated carbon filter layer (9) and ceramic filter element filter layer (10) are all composed of a lower recess (13), a guide ring (14), an upper protrusion (15) and a fixed connection part (16).

5. A filter element with a multi-layer gradient filtration structure according to claim 4, characterized in that: The fixed connection part (16) is fixedly connected to the inner wall of the filter part (2), and the recessed part (13) is fixedly connected to the inner wall of the fixed connection part (16).

6. A filter element with a multi-layer gradient filtration structure according to claim 4, characterized in that: The guide ring (14) is fixedly connected to the top of the lower recess (13), and the upper protrusion (15) is fixedly connected to the inner wall of the lower recess (13).

7. A filter element with a multi-layer gradient filtration structure according to claim 1, characterized in that: The outer shell (1) has a viewing groove and an observation window (4) on its surface. The outer side of the filter part (2) has an observation groove (6) and the area of ​​the observation window (4) overlaps with that of the observation groove (6).

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