Resin filter core structure and water purifier applying same

Abstract

The application discloses a resin filter core structure and a water purifier applying the same, and belongs to the technical field of water purification. The water purifier comprises a box body and a filter core assembly. A first cavity is arranged in the box body. The filter core assembly is arranged in the first cavity. The filter core assembly comprises a shell, a center pipe, a second cavity, a resin core layer, a water distributor and a filter layer. The second cavity is arranged in the shell. The center pipe is arranged in the second cavity. The lower end of the center pipe is communicated to the outer bottom wall of the shell. The filter layer is arranged on the upper outer wall of the center pipe. The resin core layer is arranged in the second cavity. The water distributor is arranged on the outer wall of the center pipe around the filter layer. The water inlet direction is changed through the water distributor, so that the water flow can fully flow in the resin core layer, the service life is prolonged, and the purification effect is improved.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, specifically to a resin filter structure and a water purifier using the same. Background Technology

[0002] Ion exchange resins are widely used in water treatment. Their main advantages lie in their large treatment capacity, wide decolorization range, and high decolorization capacity, effectively removing various ions from water. Furthermore, they can be repeatedly used through regeneration, exhibiting a long service life and low operating costs. Various water treatment technologies developed based on ion exchange resins have become important processes for obtaining high-purity water.

[0003] In existing water purifier filter cartridges using cation exchange resin, the typical water flow path and purification method is as follows: raw water enters from the bottom of the filter cartridge, flows through the resin-filled middle layer for ion exchange, and then the purified water rises to the orifice at the top of the central tube. The central tube is covered with protective non-woven fabric and finally flows through the internal channel of the central tube to the bottom outlet for discharge. This "bottom-up, unidirectional" laminar flow filtration structure can achieve basic purification functions, but its water flow path is relatively simple and fixed. When the water flows through the resin layer, it tends to pass through the fixed channel of least resistance, which can easily cause uneven contact inside the resin bed. It cannot fully disturb and utilize the exchange capacity of all the resin. During long-term operation, the local resin in the main water flow path will "fatigue" or fail too quickly due to ion exchange saturation, while the resin in other areas may not be fully utilized. This not only causes the overall purification efficiency of the filter cartridge to drop rapidly with the use time, but also greatly shortens the effective working life of the filter cartridge, resulting in low resin utilization, frequent replacement, and increased operating costs.

[0004] Therefore, there is a need for a filter element structure that can improve resin utilization and extend the effective life of the filter element. Summary of the Invention

[0005] One of the objectives of this invention is to provide a resin filter element structure that solves the problems of low filter element utilization and short service life in existing resin filter element structures.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows: A resin filter structure includes a housing and a filter assembly. The housing has a first cavity, and the filter assembly is disposed within the first cavity. The filter assembly includes a shell, a central tube, a second cavity, a resin core layer, a water distributor, and a filter layer. The second cavity is disposed within the shell, and the central tube is disposed within the second cavity, with its lower end connected to the outer bottom wall of the shell. The filter layer is disposed on the upper outer wall of the central tube, and the resin core layer is disposed within the second cavity. The water distributor is disposed around the filter layer on the outer wall of the central tube, changing the water inlet direction and allowing water to flow fully within the resin core layer, thereby extending the service life and improving the purification effect.

[0007] Furthermore, the upper end of the water distributor is configured as an open expansion shape, the lower end of the water distributor is connected to the outer wall of the central tube, and a first channel for water supply is provided between the upper end of the water distributor and the top wall of the second cavity to change the water flow path, so that the water flows to both sides and then is collected, making full use of the resin core layer for filtration.

[0008] Furthermore, a second channel for water inflow is provided between the shell and the bottom wall of the first cavity, and a through hole is provided on the bottom wall of the shell to allow water to flow in from bottom to top.

[0009] Furthermore, a water distributor is provided on the bottom wall of the housing, and multiple water distribution holes are evenly arranged on the water distributor to distribute the water inlet evenly.

[0010] Preferably, the water distributor is configured in a funnel shape, and the resin core layer contains multiple resin balls, resulting in high filtration efficiency.

[0011] Preferably, the lower end of the central tube is provided with a water flow hole and an annular platform, the bottom wall of the box is provided with an annular groove, a water flow nozzle is provided in the annular groove, the water flow hole is connected to the water flow nozzle, and the annular platform is engaged in the annular groove, which ensures accurate positioning and prevents water leakage.

[0012] Preferably, the housing further includes a third cavity, which is disposed above the second cavity. The third cavity has a sliding cover that closes the upper end of the central tube, allowing for rinsing and cleaning, and extending its service life.

[0013] As an even better feature, the top of the housing is also provided with a movable handle, and the filter element assembly is detachably connected to the housing for easy replacement.

[0014] As an even better feature, the bottom of the housing is provided with a support column, which contacts the bottom wall of the box, ensuring a stable input of purified water.

[0015] The second objective of this invention is to provide a water purifier that solves the problem of rapid degradation of existing water purifiers after long-term use.

[0016] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows: A water purifier includes the aforementioned resin filter structure, which is easy to replace and has a long service life.

[0017] The beneficial effects of this invention are as follows: (1) The resin filter element has a water distributor on the top of the central tube. The water distributor changes the original upward water flow path, so that after the raw water enters the upper opening of the water distributor through the first channel, the water flow direction is changed and dispersed to the surroundings and downwards along its expanding inner wall. This realizes the pre-diffusion and redistribution of water flow in the upper part of the resin core layer, so that the water flow can penetrate the entire resin bed layer more evenly from top to bottom. This avoids the water flow from concentrating through local fixed channels. The exchange capacity of each part of the resin bed layer is consumed synchronously and evenly, which significantly improves the overall utilization rate of the resin and alleviates the problem of premature decay of the overall purification capacity of the filter element due to local resin saturation.

[0018] (2) The resin filter element adopts a water distributor and support column structure. The water distributor is evenly provided with water distribution holes, which can initially distribute the water flow from the second channel at the bottom of the box so that it can enter the bottom of the shell smoothly. The support column structure ensures a stable gap between the bottom of the filter element assembly and the bottom wall of the box, that is, the unobstructed flow of the second channel. The two work together to ensure that the water flow has a uniform and stable flow state before entering the bottom of the resin bed. The combination of bottom water inlet homogenization and top water distribution diffusion makes the contact reaction between the resin and water more complete and consistent, thereby achieving more stable and more efficient continuous purification.

[0019] (3) The resin filter element structure is also equipped with a third chamber and a sliding cover inside, which provides the filter element with a switchable bidirectional working mode. In the conventional filtration mode, when regeneration or reverse purification is required, the sliding cover can be opened so that the water can enter from the top of the central tube, flow in reverse through the resin layer through the third chamber and then flow out from the bottom. The reverse flow mode can not only effectively loosen the compacted resin bed and discharge the trapped impurities, but also make the regenerated liquid contact the resin more fully during regeneration. By periodically switching the flow direction, the exchange load of the resin can be disturbed and rebalanced, maximizing the activation and utilization of the exchange capacity of all resins, thereby extending the effective working life of the filter element and solving the problem of the low overall life of traditional unidirectional filter elements due to uneven resin utilization. Attached Figure Description

[0020] Figure 1 This is an isometric view of the resin filter element structure provided by the present invention; Figure 2This is a front view of the resin filter element structure provided by the present invention; Figure 3 A side view of the resin filter element structure provided by the present invention; Figure 4 This is a top view of the resin filter element structure provided by the present invention; Figure 5 A bottom view of the resin filter element structure provided by the present invention; Figure 6 for Figure 2 Top AA line cross section; Figure 7 for Figure 3 Cross-sectional view along the upper BB line.

[0021] Figure label: 1. Housing; 11. First cavity; 12. Positioning groove; 2. Filter element assembly; 21. Shell; 211. Central tube; 212. Water outlet; 22. Second cavity; 23. Resin core layer; 24. Water distributor; 241. Water distribution hole; 25. Water distributor; 26. Filter layer; 27. Third cavity; 271. Movable handle; 272. Sliding cover; 28. Water nozzle; 281. Support column. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1 like Figures 1-7As shown, this embodiment discloses a resin filter structure, including a housing 1 and a filter assembly 2. The housing 1 has a first cavity 11 for containing water to be purified. The filter assembly 2 is disposed within the first cavity 11 and includes a housing 21, a central tube 211, a second cavity 22, a resin core layer 23, a water distributor 25, and a filter layer 26. The second cavity 22 is disposed within the housing 21, and the central tube 211 is disposed within the second cavity 22, with its lower end connected to the outer bottom wall of the housing 21. The filter layer 26 is disposed within the central cavity 21. The upper outer wall of the core tube 211 is used to filter the water passing through the resin core layer 23 to remove particulate matter. The resin core layer 23 is set inside the second cavity 22 to replace heavy metal elements in the water and play a preliminary purification role. The water distributor 25 is set around the filter layer 26 on the outer wall of the central tube 211 to collect the water above the water distributor 25. By changing the flow direction of the water inside the water distributor 25, the water can fully utilize the resin core layer 23 for purification after entering the second cavity 22 from the bottom of the first cavity 11, thereby improving the purification efficiency and service life.

[0024] Preferably, the filter layer 26 is activated carbon or a microporous membrane, wrapped around the upper outer wall of the central tube 211, and located above the resin core layer 23; it is used to intercept particulate matter that may be released from the resin core layer 23 to ensure the purity of the effluent.

[0025] Furthermore, the upper end of the water distributor 25 is set in an open, expanding shape to expand the range of water collection and constrain the water flow path to disperse it outward, so as to make full use of the resin core layer 23. The lower end of the water distributor 25 is connected to the outer wall of the central tube 211, which can deliver the purified water downward. A first channel for water supply is provided between the upper end of the water distributor 25 and the top wall of the second cavity 22. The dispersed water is collected by the water distributor 25 from the first channel.

[0026] Furthermore, a second channel for water inflow is provided between the shell 21 and the bottom wall of the first cavity 11. A through hole is provided on the bottom wall of the shell 21. The second channel is located between the outer bottom wall of the shell 21 and the inner bottom wall of the box 1, so that the water in the first cavity 11 can smoothly enter the second cavity 22 for purification.

[0027] The first channel refers to the annular gap between the upper expansion edge of the water distributor 25 and the top wall of the second cavity 22, with a width of 1-5 mm. The second channel refers to the space between the bottom wall of the housing 21 and the bottom wall of the first cavity 11, with a height of 2-10 mm, to ensure that water flows in evenly.

[0028] See Figure 6Furthermore, a water distributor 24 is provided on the bottom wall of the housing 21. The water distributor 24 is evenly provided with multiple water distribution holes 241. The water distributor 24 covers the bottom of the housing 21. Water entering from the second channel flows evenly upward from the bottom of the second cavity 22 after passing through the water distribution holes 241 on the water distributor 24, and fully contacts the resin core layer 23 to complete the purification. The resin core layer 23 is evenly worn and the water purification efficiency is guaranteed, thus extending its service life.

[0029] Specifically, the water distributor 24 has a plate-like structure that covers the entire bottom wall of the housing 21 and is fixed by snaps, threads, or welding; the water distribution holes 241 are evenly distributed, with a diameter of 0.5-3 mm and a number of 100-500, to ensure that the water flows evenly upward into the second cavity 22.

[0030] Preferably, the water distributor 25 is funnel-shaped, with its outer wall forcing the water flow path to change and fully pass through the resin core layer 23, and its inner wall collecting the purified water to stabilize the water output. The resin core layer 23 contains multiple resin balls, which can increase the contact area with water and improve purification efficiency. Specifically, the lower end of the water distributor 25 is fixedly connected to the outer wall of the central tube 211 and below the filter layer 26; the upper end is open and extends to near the top wall of the second cavity 22. The outer wall of the water distributor 25 is used to guide the water flow outward and disperse it through the resin core layer 23, while the inner wall is used to collect the purified water and guide it downward into the central tube 211.

[0031] See Figure 5 Preferably, the lower end of the central tube 211 is provided with a water outlet 212 and an annular platform. The bottom wall of the box body 1 is provided with an annular groove, in which a water outlet 28 is provided. The water outlet 212 is connected to the water outlet 28, and the annular platform is engaged in the annular groove. The purified water flows downward from the central tube 211 and is delivered outward through the water outlet 28, ensuring stable water output and facilitating replacement after wear and tear.

[0032] More preferably, the housing 21 also includes a third cavity 27, which is disposed above the second cavity 22. The third cavity 27 is provided with a sliding cover 272, which closes the upper end of the central tube 211. Opening the sliding cover 272 can clean the central tube 211, prevent blockage after long-term use, and extend its service life.

[0033] More preferably, the top of the housing 21 is also provided with a movable handle 271, and the filter element assembly 2 is detachably connected to the housing 1. The filter element assembly 2 can be quickly removed through the movable handle 271, making it convenient to disassemble and replace.

[0034] More preferably, the bottom of the housing 21 is provided with a support column 281, which contacts the bottom wall of the box 1. The support column 281 provides support for the second channel, ensuring the height of the second channel, thereby controlling the flow of water, i.e., the amount of purified water, to ensure stable and sufficient purification.

[0035] More preferably, an annular flange is provided on the outer bottom wall of the housing 1, and the water nozzle 28 is located inside the annular flange to provide protection. Positioning grooves 12 are provided on the two outer side walls of the annular flange for the overall installation of the resin filter structure. The resin filter structure can be installed on the water purification equipment and used as a pre-treatment device for heavy metal purification.

[0036] The working process of the resin filter element structure is as follows: The water to be purified enters the first cavity 11 of the housing 1 through an external pipe. The first cavity 11 serves as a water storage area to hold the water to be treated. The water flows downward from the bottom of the first cavity 11 through the second channel under the action of gravity or pressure. The height of the second channel is supported and stabilized by the support column 281 to ensure uniform water flow and controllable flow rate. After entering the second channel, the water is dispersed through the water distribution holes 241 on the water distributor 24, forming multiple fine streams that evenly permeate upward from the bottom of the second cavity 22. The even distribution of the water distribution holes 241 avoids water concentration and ensures full utilization of the resin core layer 23. The water flows upward through the resin core layer 23 in the second cavity 22 and undergoes a displacement reaction with the heavy metal ions in the water, initially removing heavy metal elements and achieving water purification. The purified water reaches the top of the second cavity 22 and encounters the upper expansion structure of the water distributor 25 to expand the collection range. The water is collected by the inner wall of the water distributor 25 through the first channel and enters the central pipe 211. As the water flows downward along the central pipe 211, it passes through the central pipe 211. The filter layer 26 on the upper outer wall is an activated carbon layer that adsorbs or traps residual particulate matter and organic matter, further purifying the water. The purified water continues to flow downward through the central tube 211 and is discharged from the water outlet 212 at its lower end. After long-term use, if it is necessary to clean the central tube 211 to prevent clogging, the sliding cover 272 on the third chamber 27 can be opened to expose the upper end of the central tube 211 for rinsing or brushing. The filter element assembly 2 can be removed from the box 1 as a whole through the movable handle 271, which is convenient for replacing the resin core layer 23 or other parts.

[0037] Example 2 This embodiment also discloses a water purifier, including a resin filter structure. By changing the water flow path, the resin core layer 23 is fully utilized for purification, extending the service life. The resin filter structure can be detachably connected, making it convenient to replace after wear and tear.

[0038] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and any modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A resin filter element structure, comprising a housing (1) and a filter element assembly (2), wherein the housing (1) is provided with a first cavity (11), and the filter element assembly (2) is disposed within the first cavity (11), characterized in that: The filter assembly (2) includes a housing (21), a central tube (211), a second cavity (22), a resin core layer (23), a water distributor (25), and a filter layer (26). The second cavity (22) is disposed inside the housing (21). The central tube (211) is disposed inside the second cavity (22), and the lower end of the central tube (211) is connected to the outer bottom wall of the housing (21). The filter layer (26) is disposed on the upper outer wall of the central tube (211). The resin core layer (23) is disposed inside the second cavity (22). The water distributor (25) is disposed around the filter layer (26) on the outer wall of the central tube (211).

2. The resin filter element structure according to claim 1, characterized in that: The upper end of the water distributor (25) is configured as an open expansion shape, and the lower end of the water distributor (25) is connected to the outer wall of the central pipe (211). A first channel for water supply is provided between the upper end of the water distributor (25) and the top wall of the second cavity (22).

3. The resin filter element structure according to claim 2, characterized in that: A second channel for water to flow in is provided between the shell (21) and the bottom wall of the first cavity (11), and a through hole is provided on the bottom wall of the shell (21).

4. The resin filter element structure according to claim 3, characterized in that: The bottom wall of the housing (21) is also provided with a water distributor (24), and the water distributor (24) is provided with a plurality of water distribution holes (241) evenly distributed.

5. The resin filter element structure according to claim 1, characterized in that: The water distributor (25) is configured in the shape of a funnel, and the resin core layer (23) contains a plurality of resin balls.

6. The resin filter element structure according to claim 1, characterized in that: The lower end of the central tube (211) is provided with a water flow hole (212) and an annular platform. The bottom wall of the box (1) is provided with an annular groove, and a water flow nozzle (28) is provided in the annular groove. The water flow hole (212) is connected to the water flow nozzle (28), and the annular platform is engaged in the annular groove.

7. The resin filter element structure according to claim 1, characterized in that: The housing (2) also includes a third cavity (27), which is located above the second cavity (22). The third cavity (27) is provided with a sliding cover (272) which closes the upper end of the central tube (211).

8. The resin filter element structure according to claim 7, characterized in that: The top of the housing (2) is also provided with a movable handle (271), and the filter element assembly (2) is detachably connected to the box (1).

9. The resin filter element structure according to claim 2, characterized in that: The bottom of the housing (2) is provided with a support column (281), which is in contact with the bottom wall of the box (1).

10. A water purifier, characterized in that: Includes the resin filter structure according to any one of claims 1-9.

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