Filter element and water purification equipment

Abstract

The utility model relates to the technical field of water purification, in particular to a filter element and water purification equipment, the filter element comprises a filter bottle body and a filter assembly, the filter assembly comprises a filter cartridge, an RO membrane assembly and a PE central pipe, a first pure water channel communicated with a pure water port is arranged between the outer wall of the filter cartridge and the inner wall of the filter bottle body, and a second pure water channel communicated with the pure water port is arranged between the RO membrane assembly and the PE central pipe. The first pure water channel is used for conveying pure water, the PE central pipe is used for conveying concentrated water, and the volume of the PE central pipe is smaller than that of the first pure water channel. The volume of the pure water end of the RO membrane assembly is increased by increasing the first pure water channel, the volume of the concentrated water end of the RO membrane assembly is reduced synchronously, and when the solute entering the concentrated water end is all forward-permeated to the concentrated water end, due to the fact that the solvent at the pure water end is increased, according to the concentration = solute / solvent, the solute is reduced, and the solvent is increased, the concentration of the solute is reduced. And the concentration of the pure water end is greatly reduced, so that the effect of reducing the TDS of the first cup of water is achieved.

Description

Technical Field

[0001] This utility model relates to the field of water purification technology, and in particular to a filter element and a water purification device. Background Technology

[0002] In the current market, most reverse osmosis (RO) water purifiers integrate the RO membrane with the water circuit assembly, then install it in a ring-shaped rib in the middle of the tank for sealing. This integrated water circuit design typically uses an outer inlet for water intake and an inner outlet for pure and concentrated water. However, this design has a major drawback: the inlet volume of the RO membrane assembly is relatively large, while the pure water volume is relatively small. This easily leads to forward osmosis, resulting in a high TDS value in the first cup of water. An excessively high TDS value not only affects the user experience but may also have negative health effects. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide at least one beneficial option or create conditions to solve one or more technical problems existing in the prior art.

[0004] The solution to the technical problem of this utility model is: a filter element, including a filter bottle body and a filter assembly. The filter bottle body has an installation space inside. One end of the filter bottle body has an inlet, a pure water outlet, and a concentrated water outlet, all connected to the installation space. The filter assembly is disposed in the installation space. The filter assembly includes a filter cartridge, an RO membrane assembly, and a PE central tube. The RO membrane assembly is sleeved on the PE central tube, and the filter cartridge is sleeved on the RO membrane assembly. The outer wall of the filter cartridge and the inner wall of the filter bottle body have a first pure water channel communicating with the pure water outlet. The RO membrane assembly has a pure water outlet, a concentrated water outlet, and an inlet. The first pure water channel is connected to the pure water outlet. One end of the PE central tube is connected to the concentrated water outlet, and the other end of the PE central tube is connected to the concentrated water outlet. The inlet is connected to the inlet. The first pure water channel is used to transport pure water, and the PE central tube is used to transport concentrated water. The volume of the PE central tube is smaller than the volume of the first pure water channel.

[0005] The beneficial effects of this invention are as follows: the inlet is used to connect to an external tap water pipe, through which tap water enters the filter assembly; the pure water inlet is used to connect to an external purified water pipe, through which filtered pure water enters the first pure water channel and is discharged from the pure water inlet to the purified water pipe; the concentrate inlet is used to connect to a sewage pipe, through which filtered concentrate is discharged to an external sewage pipe. Pure water is transported through the first pure water channel to increase the volume of the pure water end of the RO membrane assembly. Simultaneously, by reducing the volume of the inlet / concentrate ends of the RO membrane assembly, the solute concentration at the inlet / concentrate ends is reduced. When all the solute at the inlet / concentrate ends of the RO membrane assembly has permeated to the concentrate end, the increased solvent at the pure water end, according to the formula concentration = solute / solvent, results in a significant decrease in solute concentration and an increase in solvent concentration, thus achieving the effect of reducing the TDS of the first cup of water.

[0006] As a further improvement to the above technical solution, the filter bottle body is also provided with a water inlet cylindrical port and a concentrate cylindrical port. The water inlet is connected to the internal space through the water inlet cylindrical port, and the concentrate port is connected to the internal space through the concentrate cylindrical port. The filter assembly also includes a water path conversion end cap, which is disposed between the filter cartridge and the filter bottle body. The water path conversion end cap is fixedly connected to one end of the filter cartridge. The water path conversion end cap is provided with a water inlet channel and a first concentrate channel. The water inlet cylindrical port is inserted into the water inlet channel, which connects the water inlet and the water inlet end. The concentrate cylindrical port is inserted into the first concentrate channel, which connects the concentrate port and the PE central tube.

[0007] As a further improvement to the aforementioned technical solution, the water inlet channel and the concentrate channel are effectively isolated by the water channel conversion end cap, avoiding cross-contamination between the two and thus improving filtration efficiency and water purity. Simultaneously, the introduction of the water channel conversion end cap simplifies the system's installation and maintenance process, making operation more convenient and reducing maintenance costs. The inlet channel effectively connects the inlet to the inlet end, ensuring that the water source can smoothly enter the system; the first concentrate channel connects the concentrate outlet to the PE central pipe, allowing the filtered concentrate to be discharged smoothly.

[0008] As a further improvement to the above technical solution, the water circuit conversion end cover is provided with a first sealing ring, a second sealing ring, and a third sealing ring. The outer wall of the first sealing ring abuts against the inner wall of the water inlet channel, the inner wall of the first sealing ring abuts against the outer wall of the water inlet cylindrical port, the outer wall of the second sealing ring abuts against the inner wall of the first concentrate channel, the inner wall of the second sealing ring abuts against the outer wall of the concentrate cylindrical port, the outer wall of the third sealing ring abuts against the inner wall of the water circuit conversion end cover, and the inner wall of the third sealing ring abuts against the outer wall of the filter cartridge.

[0009] As a further improvement to the above technical solution, the first sealing ring ensures the seal between the water inlet channel and the water inlet cylindrical port; the second sealing ring ensures the seal between the first concentrate channel and the concentrate cylindrical port; and the third sealing ring ensures the seal between the water circuit conversion end cap and the filter cartridge. This multi-seal design improves the overall system's sealing performance, reduces malfunctions and maintenance costs caused by leakage, protects internal components from corrosion and contamination, extends the overall service life of the equipment, and reduces potential safety hazards caused by leakage, providing users with a more reliable and safer user experience.

[0010] As a further improvement to the above technical solution, the filter assembly also includes a concentrate adapter, which is disposed between the water circuit conversion end cap and the PE central tube, and has a third concentrate channel that connects the first concentrate channel and the PE central tube.

[0011] As a further improvement to the above technical solution, the third concentrate channel connects the first concentrate channel and the PE central pipe, ensuring that the concentrate can flow smoothly from the PE central pipe to the first concentrate channel, optimizing the concentrate discharge process, thereby significantly improving the working efficiency of the entire system.

[0012] As a further improvement to the above technical solution, the concentrate adapter is provided with a fourth sealing ring, a fifth sealing ring, and a sixth sealing ring. The fourth sealing ring is disposed between the concentrate adapter and the water circuit conversion end cap. The inner wall of the fifth sealing ring abuts against the outer wall of the concentrate adapter, and the outer wall of the fifth sealing ring abuts against the inner wall of the RO membrane module. The inner wall of the sixth sealing ring abuts against the outer wall of the PE central tube, and the outer wall of the sixth sealing ring abuts against the inner wall of the third concentrate channel.

[0013] As a further improvement to the aforementioned technical solution, the fourth sealing ring ensures the seal between the concentrate adapter and the water circuit conversion end cap, the fifth sealing ring ensures the seal between the concentrate adapter and the RO membrane module, and the sixth sealing ring ensures the seal between the PE central pipe and the third concentrate channel. These features prevent concentrate leakage at each connection point and ensure the stable operation of the entire system. This improvement not only enhances system reliability but also extends equipment lifespan and reduces maintenance costs, demonstrating significant economic benefits and practical value.

[0014] As a further improvement to the above technical solution, the filtration assembly also includes a pure water / concentrated water path conversion component. The pure water / concentrated water path conversion component is disposed between the filter cartridge and the filter bottle body. The pure water / concentrated water path conversion component is fixedly connected to one end of the filter cartridge away from the water path conversion end cap. The pure water / concentrated water path conversion component is provided with a second pure water channel and a second concentrated water channel. The second pure water channel connects the pure water outlet end and the first pure water channel, and the second concentrated water channel connects the concentrated water outlet end and the PE central pipe.

[0015] As a further improvement to the above technical solution, by adding a pure and concentrated water circuit conversion component, two water channels can be arranged on a single structural component, which not only meets the design requirements but also improves the applicability and convenience of the filter assembly. The addition of the pure and concentrated water circuit conversion component also improves the overall sealing performance of the filter assembly, reduces the risk of leakage caused by improper water circuit connection, and thus ensures the safety and reliability of the entire filtration system.

[0016] As a further improvement to the above technical solution, the pure and concentrated water circuit conversion component is provided with a seventh sealing ring, an eighth sealing ring, and a ninth sealing ring. The outer wall of the seventh sealing ring abuts against the inner wall of the second concentrated water channel, the inner wall of the seventh sealing ring abuts against the outer wall of the PE central tube, the outer wall of the eighth sealing ring abuts against the inner wall of the RO membrane assembly, the inner wall of the eighth sealing ring abuts against the outer wall of the pure and concentrated water circuit conversion component, and the ninth sealing ring is disposed between the pure and concentrated water circuit conversion component and the filter cartridge.

[0017] As a further improvement to the above technical solution, the seventh sealing ring ensures the sealing between the second concentrate channel and the PE central tube, the eighth sealing ring ensures the sealing between the RO membrane module and the pure concentrate conversion component, and the ninth sealing ring ensures the sealing between the pure concentrate conversion component and the filter cartridge. This improves the sealing performance and reliability of the system, effectively preventing liquid leakage, cross-contamination, and the intrusion of external pollutants, thereby ensuring the long-term stable operation of the system.

[0018] A water purification device includes a filter element as described in any of the preceding claims, the filter element being disposed on the main body of the water purification device.

[0019] As a further improvement to the above technical solution, by optimizing the filter element's structural design and reducing the volume of the inlet and outlet water, filtration efficiency and pure water quality are improved. Furthermore, filter element replacement and maintenance become more convenient, allowing users to easily replace the filter element and ensuring the long-term stable operation of the water purification equipment. Overall, this invention not only improves the performance of the water purification equipment but also enhances the user experience. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] In the attached diagram: 1-Filter bottle body, 101-Inlet, 102-Pure water outlet, 103-Concentrate outlet, 104-Inlet cylindrical port, 105-Concentrate cylindrical port, 2-Filter assembly, 201-Filter cartridge, 202-RO membrane assembly, 203-PE central tube, 204-Pure water outlet, 205-Concentrate outlet, 206-Inlet, 3-First pure water channel, 4-Water circuit conversion end cap, 401-Inlet channel, 40 2-First concentrate channel, 403-First sealing ring, 404-Second sealing ring, 405-Third sealing ring, 5-Concentrate adapter, 501-Third concentrate channel, 502-Fourth sealing ring, 503-Fifth sealing ring, 504-Sixth sealing ring, 6-Pure concentrate conversion component, 601-Second pure water channel, 602-Second concentrate channel, 603-Seventh sealing ring, 604-Eighth sealing ring, 605-Ninth sealing ring. Detailed Implementation

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments have been briefly explained above. Obviously, the described drawings are only a part of the embodiments of this utility model, not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0023] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages mentioned herein do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0024] In the current market, most reverse osmosis (RO) water purifiers integrate the RO membrane with the water circuit assembly, then install it in the annular rib in the middle of the tank for sealing. This integrated water circuit design typically uses an outer inlet for water intake and an inner outlet for pure and concentrated water. However, this design has a major drawback: the inlet 206 of the RO membrane assembly 202 has a relatively large volume, while the pure water volume is relatively small. This easily leads to forward osmosis, resulting in a high TDS value in the first cup of water. An excessively high TDS value not only affects the user experience but may also have negative health effects.

[0025] Therefore, a filter element, referring to Figure 1 The filter includes a filter bottle body 1 and a filter assembly 2. The filter bottle body 1 has an internal installation space. One end of the filter bottle body 1 has an inlet 101, a pure water outlet 102, and a concentrate outlet 103, all connected to the installation space. The filter assembly 2 is disposed within the installation space and includes a filter cartridge 201, an RO membrane assembly 202, and a PE central tube 203. The RO membrane assembly 202 is sleeved outside the PE central tube 203, and the filter cartridge 201 is sleeved outside the RO membrane assembly 202. A connection is formed between the outer wall of the filter cartridge 201 and the inner wall of the filter bottle body 1, and between the pure water outlet 101 and the filter assembly 202. The first pure water channel 3 is connected to the RO membrane module 202, which has a pure water outlet 204, a concentrated water outlet 205, and an inlet 206. The first pure water channel 3 is connected to the pure water outlet 204. One end of the PE central tube 203 is connected to the concentrated water outlet 205, and the other end of the PE central tube 203 is connected to the concentrated water outlet 103. The inlet 206 is connected to the inlet 101. The first pure water channel 3 is used to transport pure water, and the PE central tube 203 is used to transport concentrated water. The volume of the PE central tube 203 is smaller than the volume of the first pure water channel 3.

[0026] The inlet 101 is used to connect to an external tap water pipe, through which tap water enters the filter module 2; the pure water outlet 102 is used to connect to an external purified water pipe, through which filtered pure water enters the first pure water channel 3 and is discharged from the pure water outlet 102 to the purified water pipe; the concentrate outlet 103 is used to connect to a sewage pipe, through which filtered concentrate is discharged to an external sewage pipe. Pure water is delivered through the first pure water channel 3 to increase the volume of the pure water end of the RO membrane module 202. Simultaneously, by reducing the volume of the inlet / concentrate ends of the RO membrane module 202, the solute concentration at the inlet / concentrate ends is reduced. When all the solute at the inlet / concentrate ends of the RO membrane module 202 has permeated to the concentrate end, the increased solvent at the pure water end, according to the formula concentration = solute / solvent, results in a significant decrease in the concentration at the pure water end, thus achieving the effect of reducing the TDS of the first cup of water.

[0027] When the filter element is working, natural water enters the filter element through the inlet 101. The water circuit conversion end cover 4 connects the concentrated water cylindrical port 105 and the inlet cylindrical port 104. Tap water enters the cylindrical port 104 and the inlet channel 401 in sequence, and then enters from the inlet end 206 at the top of the RO membrane module 202. Water that can be filtered by the RO membrane module 202 is called pure water, and water that cannot be filtered by the RO membrane module 202 is called concentrated water. Pure water is discharged from the pure water outlet end 204 on the inner wall of the RO membrane module 202 and enters the pure and concentrated water circuit conversion component 6. Concentrated water enters the pure and concentrated water circuit conversion component 6 from the pure water outlet end 204 at the bottom of the RO membrane module 202. In component 6, pure water and concentrated water are separated in the pure water and concentrated water circuit conversion component 6; pure water enters the first pure water channel 3 through the second pure water channel 601, and then is discharged from the pure water port 102 connected to the first pure water channel 3 to the external clean water pipe; concentrated water enters the PE central pipe 203 through the second concentrated water channel 602, and the concentrated water conversion head connects the PE central pipe 203 and the concentrated water cylindrical port 105. The concentrated water passes through the second concentrated water channel 602, the PE central pipe 203, the third concentrated water channel 501, and the first concentrated water channel 402 in sequence, and then is discharged from the concentrated water port 103 connected to the first concentrated water channel 402 to the external concentrated water pipe.

[0028] Preferably, the filter bottle body includes a cap and a bottle body, and the cap is detachably connected to the bottle body to facilitate the replacement of the RO membrane assembly 202.

[0029] Preferably, a water sealing assembly is provided at the water inlet 101, the pure water outlet 102, and the concentrated water outlet 103. The water sealing assembly includes a sleeve, a stop block, and a spring, which seals the interface when no water is flowing through.

[0030] The water channel conversion end cover 4 can be switched in different directions to achieve multiple water channel connection methods. Therefore, in one embodiment, the filter bottle body 1 is further provided with a water inlet cylindrical port 104 and a concentrate cylindrical port 105. The water inlet 101 is connected to the internal space through the water inlet cylindrical port 104, and the concentrate port 103 is connected to the internal space through the concentrate cylindrical port 105. The filter assembly 2 also includes a water path conversion end cap 4. The water path conversion end cap 4 is disposed between the filter cylinder 201 and the filter bottle body 1. The water path conversion end cap 4 is fixedly connected to one end of the filter cylinder 201. The water path conversion end cap 4 is provided with a water inlet channel 401 and a first concentrate channel 402. The water inlet cylindrical port 104 is inserted into the water inlet channel 401. The water inlet channel 401 connects the water inlet 101 and the water inlet end 206. The concentrate cylindrical port 105 is inserted into the first concentrate channel 402. The first concentrate channel 402 connects the concentrate port 103 and the PE central tube 203. The water path conversion end cover 4 effectively isolates the inlet water path and the concentrate water path, avoiding cross-contamination between the two and thus improving filtration efficiency and water purity. At the same time, the introduction of the water path conversion end cover 4 simplifies the system installation and maintenance process, making operation more convenient and reducing maintenance costs. The inlet water channel 401 effectively connects the inlet 101 to the inlet end 206, ensuring that the water source can smoothly enter the system. The first concentrate water channel 402 connects the concentrate water outlet 103 to the PE central pipe 203, allowing the filtered concentrate water to be discharged smoothly.

[0031] Liquid leaks can cause internal components of the equipment to rust, corrode, or be damaged due to immersion in water or contact with other liquids. Liquid leaks can also cause short circuits in electrical equipment, leading to the paralysis of the entire system. Therefore, in one embodiment, the water circuit conversion end cover 4 is provided with a first sealing ring 403, a second sealing ring 404, and a third sealing ring 405. The outer wall of the first sealing ring 403 abuts against the inner wall of the water inlet channel 401, and the inner wall of the first sealing ring 403 abuts against the outer wall of the water inlet cylindrical port 104. The outer wall of the second sealing ring 404 abuts against the inner wall of the first concentrate channel 402, and the inner wall of the second sealing ring 404 abuts against the outer wall of the concentrate cylindrical port 105. The outer wall of the third sealing ring 405 abuts against the inner wall of the water circuit conversion end cover 4, and the inner wall of the third sealing ring 405 abuts against the outer wall of the filter cartridge 201. The first sealing ring 403 ensures a tight seal between the water inlet channel 401 and the water inlet cylindrical port 104; the second sealing ring 404 ensures a tight seal between the first concentrate channel 402 and the concentrate cylindrical port 105; and the third sealing ring 405 ensures a tight seal between the water circuit conversion end cover 4 and the filter cartridge 201. This multi-seal design improves the overall system's sealing performance, reduces malfunctions and maintenance costs caused by leaks, protects internal components from corrosion and contamination, extends the overall service life of the equipment, and reduces potential safety hazards caused by leaks, providing users with a more reliable and safer user experience.

[0032] The center lines of the PE central pipe 203 and the concentrate cylindrical port 105 are not on the same vertical line, exhibiting a certain degree of offset or non-concentricity. Therefore, in one embodiment, the filter assembly 2 further includes a concentrate adapter 5, which is disposed between the water path conversion end cap 4 and the PE central pipe 203. The concentrate adapter 5 has a third concentrate channel 501, which connects the first concentrate channel 402 and the PE central pipe 203. The third concentrate channel 501 connects the first concentrate channel 402 and the PE central pipe 203, ensuring that concentrate can flow smoothly from the PE central pipe 203 to the first concentrate channel 402, optimizing the concentrate discharge process, and thus significantly improving the overall system efficiency.

[0033] During the transmission of concentrated water, since the concentrated water usually contains a high concentration of harmful substances, leakage may have serious negative impacts on the environment and human health. Therefore, in one embodiment, the concentrated water adapter 5 is provided with a fourth sealing ring 502, a fifth sealing ring 503, and a sixth sealing ring 504. The fourth sealing ring 502 is disposed between the concentrated water adapter 5 and the water circuit conversion end cap 4. The inner wall of the fifth sealing ring 503 abuts against the outer wall of the concentrated water adapter 5, and the outer wall of the fifth sealing ring 503 abuts against the inner wall of the RO membrane assembly 202. The inner wall of the sixth sealing ring 504 abuts against the outer wall of the PE central tube 203, and the outer wall of the sixth sealing ring 504 abuts against the inner wall of the third concentrated water channel 501. The fourth sealing ring 502 ensures the seal between the concentrate adapter 5 and the water circuit conversion end cap 4; the fifth sealing ring 503 ensures the seal between the concentrate adapter 5 and the RO membrane module 202; and the sixth sealing ring 504 ensures the seal between the PE central pipe 203 and the third concentrate channel 501. These features prevent concentrate leakage at each connection point and ensure the stable operation of the entire system. This improvement not only enhances system reliability but also extends equipment lifespan and reduces maintenance costs, demonstrating significant economic benefits and practical value.

[0034] In traditional filter components 2, the complex water circuit connections often require users to spend considerable time and effort on maintenance and replacement. Therefore, in one embodiment, the filter component 2 further includes a pure / concentrated water circuit converter 6, which is disposed between the filter cartridge 201 and the filter bottle body 1. The pure / concentrated water circuit converter 6 is fixedly connected to one end of the filter cartridge 201 away from the water circuit conversion end cap 4. The pure / concentrated water circuit converter 6 has a second pure water channel 601 and a second concentrated water channel 602. The second pure water channel 601 connects the pure water outlet 204 and the first pure water channel 3, and the second concentrated water channel 602 connects the concentrated water outlet 205 and the PE central pipe 203. By adding the pure and concentrated water circuit conversion component 6, two water channels can be arranged on one structural component, which not only meets the design requirements but also improves the applicability and convenience of the filter assembly 2. The addition of the pure and concentrated water circuit conversion component 6 also improves the overall sealing performance of the filter assembly 2, reduces the risk of leakage caused by improper water circuit connection, and thus ensures the safety and reliability of the entire filtration system.

[0035] If gaps exist at the connection points, external contaminants may intrude, affecting the long-term stable operation of the system. Therefore, in one embodiment, the pure and concentrated water conversion component 6 is provided with a seventh sealing ring 603, an eighth sealing ring 604, and a ninth sealing ring 605. The outer wall of the seventh sealing ring 603 abuts against the inner wall of the second concentrated water channel 602, and the inner wall of the seventh sealing ring 603 abuts against the outer wall of the PE central tube 203. The outer wall of the eighth sealing ring 604 abuts against the inner wall of the RO membrane assembly 202, and the inner wall of the eighth sealing ring 604 abuts against the outer wall of the pure and concentrated water conversion component 6. The ninth sealing ring 605 is disposed between the pure and concentrated water conversion component 6 and the filter cartridge 201. The seventh sealing ring 603 ensures the seal between the second concentrate channel 602 and the PE central tube 203, the eighth sealing ring 604 ensures the seal between the RO membrane module 202 and the pure concentrate conversion component 6, and the ninth sealing ring 605 ensures the seal between the pure concentrate conversion component 6 and the filter cartridge 201. This improves the sealing performance and reliability of the system, effectively preventing liquid leakage and cross-contamination as well as the intrusion of external pollutants, thereby ensuring the long-term stable operation of the system.

[0036] Preferably, steps are provided at all installation positions of the sealing rings, the sealing rings are secured on the steps, and a collar is provided at one end of the steps. The collar limits the position of the sealing rings and enhances the sealing effect.

[0037] A water purification device includes a filter element as described in any of the preceding claims, the filter element being disposed on the main body of the water purification device.

[0038] By optimizing the filter element's structural design, the volume of the inlet end 206 and the concentrated water outlet end 205 is reduced, while the volume of the pure water outlet end 204 is increased, thereby improving filtration efficiency and the quality of pure water. Furthermore, the filter element adopts a multi-dimensional water circuit switching mode, enabling the use of existing filter element water circuit structures and the overall water circuit board structure, thus improving the design versatility of existing products. Overall, this invention not only improves the performance of water purification equipment but also enhances the user experience.

[0039] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A filter element, characterized in that, include: The filter bottle body (1) has an installation space inside, and one end of the filter bottle body (1) is provided with an inlet (101), a pure water inlet (102) and a concentrated water inlet (103) that are all connected to the installation space. A filter assembly (2) is disposed in the installation space. The filter assembly (2) includes a filter cartridge (201), an RO membrane assembly (202), and a PE central tube (203). The RO membrane assembly (202) is sleeved outside the PE central tube (203), and the filter cartridge (201) is sleeved outside the RO membrane assembly (202). The outer wall of the filter cartridge (201) and the inner wall of the filter bottle body (1) have a first pure water channel (3) communicating with the pure water outlet (102). The RO membrane assembly (202) is provided with a pure water outlet (204). The system includes a concentrated water outlet (205) and a water inlet (206). The first pure water channel (3) is connected to the pure water outlet (204). One end of the PE central pipe (203) is connected to the concentrated water outlet (205), and the other end of the PE central pipe (203) is connected to the concentrated water outlet (103). The water inlet (206) is connected to the water inlet (101). The first pure water channel (3) is used to transport pure water, and the PE central pipe (203) is used to transport concentrated water. The volume of the PE central pipe (203) is smaller than the volume of the first pure water channel (3).

2. A filter element according to claim 1, characterized in that, The filter bottle body (1) is further provided with a water inlet cylindrical port (104) and a concentrate cylindrical port (105). The water inlet (101) is connected to the internal space through the water inlet cylindrical port (104), and the concentrate port (103) is connected to the internal space through the concentrate cylindrical port (105). The filter assembly (2) also includes a water path conversion end cap (4). The water path conversion end cap (4) is disposed between the filter cylinder (201) and the filter bottle body (1). The water path conversion end cap (4) and the filter cylinder (201) are connected to each other. One end of 201) is fixedly connected. The water circuit conversion end cover (4) is provided with an inlet channel (401) and a first concentrate channel (402). The inlet cylindrical port (104) is inserted in the inlet channel (401). The inlet channel (401) connects the inlet port (101) and the inlet end (206). The concentrate cylindrical port (105) is inserted in the first concentrate channel (402). The first concentrate channel (402) connects the concentrate port (103) and the PE center pipe (203).

3. A filter element according to claim 2, characterized in that, The water circuit conversion end cover (4) is provided with a first sealing ring (403), a second sealing ring (404), and a third sealing ring (405). The outer wall of the first sealing ring (403) abuts against the inner wall of the water inlet channel (401), the inner wall of the first sealing ring (403) abuts against the outer wall of the water inlet cylindrical port (104), the outer wall of the second sealing ring (404) abuts against the inner wall of the first concentrate channel (402), the inner wall of the second sealing ring (404) abuts against the outer wall of the concentrate cylindrical port (105), the outer wall of the third sealing ring (405) abuts against the inner wall of the water circuit conversion end cover (4), and the inner wall of the third sealing ring (405) abuts against the outer wall of the filter cylinder (201).

4. A filter element according to claim 2, characterized in that, The filter assembly (2) also includes a concentrate adapter (5), which is disposed between the water circuit conversion end cap (4) and the PE central tube (203). The concentrate adapter (5) has a third concentrate channel (501) which connects the first concentrate channel (402) and the PE central tube (203).

5. A filter element according to claim 4, characterized in that, The concentrate adapter (5) is provided with a fourth sealing ring (502), a fifth sealing ring (503) and a sixth sealing ring (504). The fourth sealing ring (502) is disposed between the concentrate adapter (5) and the water circuit conversion end cap (4). The inner wall of the fifth sealing ring (503) abuts against the outer wall of the concentrate adapter (5). The outer wall of the fifth sealing ring (503) abuts against the inner wall of the RO membrane assembly (202). The inner wall of the sixth sealing ring (504) abuts against the outer wall of the PE central tube (203). The outer wall of the sixth sealing ring (504) abuts against the inner wall of the third concentrate channel (501).

6. A filter element according to claim 4, characterized in that, The filter assembly (2) further includes a pure water-concentrate water path conversion component (6), which is disposed between the filter cylinder (201) and the filter bottle body (1). The pure water-concentrate water path conversion component (6) is fixedly connected to one end of the filter cylinder (201) away from the water path conversion end cap (4). The pure water-concentrate water path conversion component (6) is provided with a second pure water channel (601) and a second concentrated water channel (602). The second pure water channel (601) connects the pure water outlet (204) and the first pure water channel (3), and the second concentrated water channel (602) connects the concentrated water outlet (205) and the PE central tube (203).

7. A filter element according to claim 6, characterized in that, The pure and concentrated water circuit conversion component (6) is provided with a seventh sealing ring (603), an eighth sealing ring (604) and a ninth sealing ring (605). The outer wall of the seventh sealing ring (603) abuts against the inner wall of the second concentrated water channel (602), the inner wall of the seventh sealing ring (603) abuts against the outer wall of the PE central tube (203), the outer wall of the eighth sealing ring (604) abuts against the inner wall of the RO membrane assembly (202), the inner wall of the eighth sealing ring (604) abuts against the outer wall of the pure and concentrated water circuit conversion component (6), and the ninth sealing ring (605) is disposed between the pure and concentrated water circuit conversion component (6) and the filter cartridge (201).

8. A water purification device, characterized in that, Includes the filter element as described in any one of claims 1-7, wherein the filter element is disposed on the main body of the water purification device.

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