An integrated composite filter cartridge

Abstract

The utility model discloses an integrated composite filter element, through the prefiltering cartridge assembly and the post carbon rod are integrated in a unit shell in the series communication mode, and utilize the mounting seat to carry out physical separation and flow channel guide, realized the high compact of filter element structure and the high integration of function, ensured that water flow can pass prefiltering and post depth treatment in turn, and the process is reasonable, not only effectively removes the residual chlorine, the different color and the peculiar smell and the particle impurity in water, but also stably adjusts the effluent to weak alkaline through the synergistic effect of special filter material, and evenly dissolves strontium, zinc, metasilicic acid and other minerals beneficial to human health, which significantly improves the taste and health value of the effluent. Meanwhile, the modular design is convenient for installation and maintenance, and each function section can be replaced independently, which reduces the long-term use cost.

Description

Technical Field

[0001] This utility model relates to the field of composite filter technology, and in particular to an integrated composite filter. Background Technology

[0002] As people become more health-conscious, their demands for drinking water quality are increasing. They not only focus on the cleanliness of the water but also pay attention to its mineral content and pH level. Naturally weakly alkaline water, rich in beneficial minerals such as strontium, zinc, and metasilicic acid, and with a slightly alkaline pH, is considered to better meet the body's physiological needs. Long-term consumption is believed to help maintain the body's acid-base balance and replenish trace elements, thus gaining widespread popularity.

[0003] Currently, most water purification devices on the market achieve water purification and mineralization functions through filter cartridge combinations. Common filter cartridges include PP cotton, activated carbon, and reverse osmosis membranes. Among them, activated carbon filters can adsorb impurities and improve taste, while reverse osmosis membranes can deeply purify water. However, simple purification filter cartridges cannot simultaneously achieve both weak alkalization of water and precise dissolution of beneficial minerals. Although some mineralization filter cartridges can add minerals, they suffer from problems such as unstable mineral dissolution, susceptibility to water flow rate, or insufficient weak alkalization effect. Furthermore, most filter cartridges have a dispersed structure design, requiring multiple filter units to be installed independently, which not only occupies a lot of space but also leads to complex water flow paths, affecting filtration efficiency and the stability of mineralization effects.

[0004] Furthermore, existing composite filter cartridges often lack a reasonable series design for their pre-filtration and post-mineralization units. When water flows between different units, excessive pressure drop and insufficient filtration can easily occur. Additionally, the lack of ease of disassembly and assembly of the filter cartridges increases the difficulty of maintenance and replacement for users. Clearly, existing technology needs improvement and enhancement. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an integrated composite filter element to solve one or more problems existing in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an integrated composite filter element, comprising a first filter element unit, the first filter element unit having a first outer shell, a mounting base, and an end cap; the mounting base divides the inner cavity of the first outer shell into a pre-filter chamber and a post-filter chamber; a pre-filter assembly is detachably embedded in the pre-filter chamber, and a post-filter carbon rod is coaxially inserted into the post-filter chamber; an annular post-filter inlet channel is formed between the outer wall of the post-filter carbon rod and the inner wall of the first outer shell, and a central hole of the post-filter carbon rod is provided with a through-hole. A first water outlet pipe is installed, and a PP cotton core is provided between the first water outlet pipe and the rear carbon rod. The inner hole of the first water outlet pipe forms a rear water outlet channel. The end cap sealing cover is provided at the end of the first outer shell, and the surface is provided with a front water inlet, a front water outlet and a rear water outlet, which are respectively connected to the front water inlet channel, the front water outlet channel and the rear water outlet channel. The front water outlet channel and the rear water inlet channel are connected in series so that the water is weakly alkalized and dissolves strontium, zinc and metasilicic acid minerals after passing through the front filter and the rear carbon rod in sequence.

[0007] In one embodiment of the present invention, the pre-filter assembly is composed of concentrically nested scale-inhibiting carbon rods and PP cotton rods, wherein the PP cotton rods cover the outer periphery of the scale-inhibiting carbon rods. An annular pre-inlet channel is formed between the outer wall of the PP cotton rod and the inner wall of the pre-cavity chamber, and the central hole of the scale-inhibiting carbon rod and the first outlet pipe form a pre-outlet channel.

[0008] In one embodiment of the present invention, a second filter element unit is further provided in parallel on the end cap, comprising a second outer shell, a wound reverse osmosis membrane assembly, and a second outlet pipe; A reverse osmosis water inlet channel is formed between the outer periphery of the reverse osmosis membrane module and the inner wall of the second outer shell. The gap between the inner hole of the reverse osmosis membrane module and the second outlet pipe constitutes a concentrated water outlet channel. The second outlet pipe is inserted into the central hole of the reverse osmosis membrane module, and its inner hole constitutes a pure water outlet channel.

[0009] In one embodiment of the present invention, the end cap is further provided with a transverse connecting pipe for connecting the post-inlet water channel and the pure water outlet water channel. The transverse connecting pipe is used to introduce the pure water after reverse osmosis back into the post-carbon rod for mineralization.

[0010] In one embodiment of this utility model, the transverse connecting tube and the end cap are integrally formed, and the diameter is 2-4 mm.

[0011] In one embodiment of the present invention, both the first outer shell and the second outer shell are made of food-grade polypropylene.

[0012] As described above, the integrated composite filter element of this utility model has the following beneficial effects: By optimizing the internal flow channel layout and functional module combination of the filter element, a high degree of integration and synergistic effect of multiple water treatment processes is achieved. Adopting a longitudinally series dual-chamber structure, water is automatically introduced into the post-alkaline mineralization unit for deep treatment after primary purification by the pre-scale inhibitor component. This effectively ensures the controllable release of strontium, zinc, and metasilicic acid ions and precise pH control, breaking through the limitations of traditional single-stage filtration. It simultaneously achieves the triple effects of impurity interception, water activation, and mineral enhancement within the same housing, avoiding mutual interference between independent modules and significantly shortening the treatment chain length. In particular, the turbulence effect generated on the surface of the carbon rod through radial annular water inlet, combined with the secondary fine filtration effect of the PP cotton core, greatly improves the solid-liquid contact efficiency and mineral dissolution rate, ultimately obtaining a healthy drinking water source that combines cleanliness and functionality. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of the structure of the integrated composite filter element provided by this utility model; Figure 2 A partial structural cross-sectional view of the integrated composite filter element provided by this utility model; Figure 3 A partial structural cross-sectional view of the integrated composite filter element provided by this utility model.

[0015] Component designation explanation 1. First outer casing; 2. Mounting base; 3. End cap; 4. Rear carbon rod; 5. First outlet pipe; 6. Front inlet; 7. Front outlet; 8. Rear outlet; 9. Scale-inhibiting carbon rod; 10. PP cotton rod; 11. Second outer casing; 12. Reverse osmosis membrane module; 13. Second outlet pipe; 14. Horizontal connecting pipe; 15. PP cotton core. Detailed Implementation

[0016] This utility model provides an integrated composite filter element. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following detailed description is provided with reference to the accompanying drawings and embodiments. In the description of this utility model, it should be understood that the terms "up," "down," "left," and "right," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description; they should not be construed as limitations on this utility model. Furthermore, the terms "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] Please see Figures 1 to 3 This utility model provides an integrated composite filter element, including a first filter element unit. The first filter element unit has a first outer shell 1, a mounting base 2, and an end cap 3. The mounting base 2 divides the inner cavity of the first outer shell 1 into a pre-filter chamber and a post-filter chamber. A pre-filter assembly is detachably installed in the pre-filter chamber, and a post-filter carbon rod 4 is coaxially inserted into the post-filter chamber. An annular post-filter inlet channel is formed between the outer wall of the post-filter carbon rod 4 and the inner wall of the first outer shell 1. A first outlet pipe 5 is disposed through the central hole of the post-filter carbon rod 4. A PP cotton core 15 is disposed between the first outlet pipe 5 and the post-filter carbon rod 4, and the inner hole of the first outlet pipe 5 constitutes the post-filter outlet channel. Specifically, the PP cotton core 15 can effectively filter suspended particles and impurities in the water, ensuring that the water entering the post-filter carbon rod 4 is purer. The post-filter carbon rod 4 is made of high-quality activated carbon material, which has good adsorption performance and can further remove odors, residual chlorine, and other organic pollutants from the water. The design of the first outlet pipe 5 allows water to flow smoothly through the post-outlet channel after passing through multiple stages of filtration, ensuring the overall filtration efficiency and water flow rate of the filter element. Furthermore, the combination of the pre-filter assembly and the post-carbon rod 4 not only improves the filtration effect but also facilitates user replacement or cleaning of relevant components according to actual needs, thereby extending the filter element's lifespan and reducing maintenance costs.

[0018] The end cap 3 is sealed at the end of the first outer shell 1, and its surface is provided with a front water inlet 6, a front water outlet 7 and a rear water outlet 8, which are respectively connected to the front water inlet channel, the front water outlet channel and the rear water outlet channel; wherein, the front water outlet channel and the rear water inlet channel are connected in series so that the water flows through the front filter and the rear carbon rod 4 in sequence and is weakly alkalized and strontium, zinc and metasilicic acid minerals are dissolved.

[0019] In detail, the pre-filter assembly consists of concentrically nested scale-inhibiting carbon rods 9 and PP cotton rods 10, with the PP cotton rods 10 covering the outer periphery of the scale-inhibiting carbon rods 9. An annular pre-filter inlet channel is formed between the outer wall of the PP cotton rods 10 and the inner wall of the pre-filter chamber. The central hole of the scale-inhibiting carbon rods 9 and the first outlet pipe 5 enclose a pre-filter outlet channel. Specifically, water enters through the pre-filter inlet channel, undergoes preliminary filtration by the PP cotton rods 10, and then flows into the central hole of the scale-inhibiting carbon rods 9 for further filtration and treatment. During this process, the scale-inhibiting carbon rods 9 effectively remove impurities from the water and prevent scale formation, thereby improving water quality. The pre-filter outlet channel ensures smooth water flow to the post-filter chamber, while avoiding water flow resistance or blockage problems caused by unreasonable structure. The detachable design of the entire pre-filter assembly facilitates cleaning and replacement by users, extends the service life of the filter element, and improves operational convenience. It not only optimizes filtration efficiency but also ensures the stability and reliability of water quality.

[0020] In this embodiment, a second filter element unit is also included, arranged side-by-side on the end cap 3, comprising a second outer shell 11, a wound reverse osmosis membrane module 12, and a second outlet pipe 13. A reverse osmosis inlet channel is formed between the outer periphery of the reverse osmosis membrane module 12 and the inner wall of the second outer shell 11. The gap between the inner hole of the reverse osmosis membrane module 12 and the second outlet pipe 13 constitutes a concentrated water outlet channel. The second outlet pipe 13 is inserted into the central hole of the reverse osmosis membrane module 12, and its inner hole constitutes a pure water outlet channel. Specifically, the end cap 3 is also provided with a transverse connecting pipe 14 for connecting the post-inlet channel and the pure water outlet channel. The transverse connecting pipe 14 is used to reintroduce the pure water after reverse osmosis into the post-carbon rod 4 for mineralization. More specifically, the transverse connecting pipe 14 is integrally formed with the end cap 3, and the diameter is 2 to 4 mm. The specific flow time is controlled to be 2 to 5 seconds to ensure that the water flow can be fully mixed and achieve the ideal mineralization effect. By precisely controlling the flow time, the problem of uneven mineralization caused by excessive water flow can be effectively avoided, and the risk of secondary pollution caused by excessive retention time can also be prevented.

[0021] Optionally, both the first outer shell 1 and the second outer shell 11 are made of food-grade polypropylene, which has good corrosion resistance and heat resistance, effectively ensuring the stability and safety of the filter element under various water quality environments. At the same time, food-grade polypropylene is non-toxic and harmless, meeting the hygiene standards for drinking water treatment equipment, ensuring that the filtered water is pure and safe. Furthermore, this material also has high mechanical strength, capable of withstanding certain water pressure impacts, extending the service life of the filter element.

[0022] In this embodiment, the inlet and outlet holes of the post-carbon rod 4, scale-inhibiting carbon rod 9, PP cotton rod 10, and PP cotton core 15 are all equipped with a check valve structure. The check valve structure can effectively seal and isolate the filter material, reduce the risk of filter material contamination caused by environmental factors, and effectively lock in water to prevent it from overflowing when replacing it. It is convenient to use and provides a good user experience.

[0023] The specific working process of the integrated composite filter element in this embodiment is as follows: Raw water enters the first filter element unit from the front inlet 6 of the end cap 3, passes through the PP cotton rod 10 from the outside to the inside along the annular front inlet channel in the front chamber, and particulate impurities are intercepted; then the water flows into the front outlet channel formed by the central hole of the scale-inhibiting carbon rod 9, completes scale inhibition and preliminary adsorption, and flows into the interior of the mounting base 2. At this time, the front outlet channel is directly connected to the rear inlet channel, and the water flows back to the rear chamber without leakage. In the annular rear inlet channel, it permeates the rear carbon rod 4 from the outside to the inside, dissolving strontium, zinc, and metasilicic acid minerals and simultaneously increasing the pH; the weakly alkaline mineralized water flowing out through the micropores of the carbon rod passes through the PP cotton core 10. 5. After further filtration, the water enters the first outlet pipe 5 and is finally output from the rear outlet 8 of the end cap 3, resulting in safe drinking water containing appropriate amounts of beneficial minerals. If the system is equipped with a second filter unit, the pre-filter water is first introduced into the reverse osmosis inlet channel of the second shell 11 through the internal passage of the end cap 3. It undergoes high-pressure filtration on the outer surface of the wound reverse osmosis membrane module 12. The resulting concentrated water is discharged through the gap between the inner hole of the membrane module and the second outlet pipe 13, while the desalinated pure water enters the inner hole of the second outlet pipe 13 and is then guided back to the rear inlet channel through the transverse connecting pipe 14. The above mineralization steps are repeated to achieve "pure water remineralization", ensuring that the final water has a stable mineral concentration and a smooth taste.

[0024] In summary, this utility model's integrated composite filter cartridge, through the integrated design of the first filter unit, integrates pre-filtration and post-mineralization functions into one compact structure, effectively reducing space occupation, simplifying the water flow path, and improving overall filtration efficiency. The mounting base 2's partitioning design of the inner cavity of the first outer shell 1 allows for independent partitioning of the pre-filter chamber and the post-filter chamber, providing stable installation space for the pre-filter assembly and the post-carbon rod 4. Furthermore, the pre-filter assembly is detachably installed, facilitating future maintenance and replacement, thus improving ease of use. Through the series connection of the pre-filter outlet channel and the post-filter inlet channel, water flows sequentially through the pre-filter assembly and the post-carbon rod 4, achieving a continuous treatment process of filtration and purification followed by weak alkalization and mineral dissolution. This ensures that the water quality stably reaches a weakly alkaline state after purification and effectively dissolves beneficial minerals such as strontium, zinc, and metasilicic acid, meeting the needs of healthy drinking water. The annular rear-mounted water inlet channel formed between the rear carbon rod 4 and the first outer shell 1 provides ample contact path for the water flow, creating conditions for the rear carbon rod 4 to fully function. The PP cotton core effectively intercepts the outflow of activated carbon powder from the rear carbon rod, further ensuring the cleanliness of the effluent. The centralized water inlet and outlet on the end cap 3 make the overall structural layout more rational, facilitating connection with external pipelines and improving the practicality and adaptability of the filter element. Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0025] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. An integrated composite filter element, characterized in that, It includes a first filter element unit, which has a first housing (1), a mounting base (2) and an end cap (3). The mounting base (2) divides the inner cavity of the first outer shell (1) into a front chamber and a rear chamber; The pre-filter assembly is detachably installed in the pre-filter chamber, and the rear carbon rod (4) is coaxially inserted into the rear chamber. An annular rear water inlet channel is formed between the outer wall of the rear carbon rod (4) and the inner wall of the first outer shell (1). A first water outlet pipe (5) is installed through the central hole of the rear carbon rod (4). A PP cotton core (15) is installed between the first water outlet pipe (5) and the rear carbon rod (4). The inner hole of the first water outlet pipe (5) constitutes the rear water outlet channel. The end cap (3) is sealed at the end of the first outer shell (1), and its surface is provided with a front water inlet (6), a front water outlet (7) and a rear water outlet (8), which are respectively connected to the front water inlet channel, the front water outlet channel and the rear water outlet channel; The pre-filter outlet channel and the post-filter inlet channel are connected in series so that the water is weakly alkalized and strontium, zinc and metasilicic acid minerals are dissolved after passing through the pre-filter and the post-carbon rod (4) in sequence.

2. The integrated composite filter element according to claim 1, characterized in that, The pre-filter assembly consists of concentrically nested scale-inhibiting carbon rods (9) and PP cotton rods (10), wherein the PP cotton rods (10) cover the outer periphery of the scale-inhibiting carbon rods (9); The outer wall of the PP cotton rod (10) and the inner wall of the pre-cathode form an annular pre-cathode water inlet channel, and the central hole of the scale-inhibiting carbon rod (9) and the first outlet pipe (5) enclose each other to form a pre-cathode water outlet channel.

3. The integrated composite filter element according to claim 1, characterized in that, It also includes a second filter element unit arranged in parallel on the end cap (3), comprising a second housing (11), a wound reverse osmosis membrane assembly (12), and a second outlet pipe (13). The reverse osmosis membrane module (12) forms a reverse osmosis water inlet channel between its outer periphery and the inner wall of the second outer shell (11). The gap between the inner hole of the reverse osmosis membrane module (12) and the second outlet pipe (13) forms a concentrated water outlet channel. The second outlet pipe (13) is inserted into the central hole of the reverse osmosis membrane module (12), and its inner hole forms a pure water outlet channel.

4. The integrated composite filter element according to claim 3, characterized in that, The end cap (3) is also provided with a transverse connecting pipe (14) for connecting the post-inlet water channel and the pure water outlet water channel. The transverse connecting pipe (14) is used to introduce the pure water after reverse osmosis back into the post-carbon rod (4) for mineralization.

5. The integrated composite filter element according to claim 4, characterized in that, The transverse connecting pipe (14) is integrally formed with the end cap (3), and the diameter is 2 to 4 mm.

6. The integrated composite filter element according to claim 3, characterized in that, Both the first outer shell (1) and the second outer shell (11) are made of food-grade polypropylene.

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