Filter element and water purification equipment

Abstract

The utility model relates to the technical field of water treatment, and discloses a filter element and water purification equipment. Wherein the filter element comprises a cylinder body, a cylinder cover, a filter assembly, a waterway conversion end cover and a pure water and concentrated water conversion piece; one end of the cylinder is provided with a natural water port, a concentrated water port and a pure water port, natural water enters the filtering assembly through the waterway conversion end cover and is separated into pure water and concentrated water, and the pure water and concentrated water are respectively fed into the water passing interlayer and the concentrated water pipe through the pure water and concentrated water conversion part and are finally output from the concentrated water port and the pure water port through the waterway conversion end cover; the volume of the water inlet end and the volume of the concentrated water end are synchronously reduced, the volume of the pure water end is increased, solute of the water inlet end and the concentrated water end is reduced, and after the solute of the water inlet end and the solute of the concentrated water end all forwards permeates to the concentrated water end, the concentration of the pure water end can be greatly reduced due to the fact that the solvent of the pure water end is increased and the solute is reduced. Therefore, 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 treatment technology, and in particular to a filter element and a water purification device. Background Technology

[0002] With economic development and social progress, people have increasingly higher requirements for drinking water. Many families have equipped themselves with various water purification devices, such as water softeners, ultrafiltration machines, and reverse osmosis water purifiers. The emergence of various water purification devices has met people's diverse water needs in daily life, and simultaneously improved people's living standards and water health.

[0003] Currently, most reverse osmosis filter cartridges on the market are assembled with RO membranes and water exchange components, then sealed at the annular rib position in the middle of the tank. The overall water circuit has water entering from the outside and pure water + wastewater from the inside. This results in a large inlet volume and a small pure water volume, which makes it easy for forward osmosis to occur. This leads to a high TDS in the first cup of water, affecting the user experience and health. Utility Model Content

[0004] The present invention aims to improve at least one technical problem in the prior art.

[0005] The first aspect of this utility model provides a filter element, comprising:

[0006] The cylinder is hollow inside, with a first opening at one end and a natural water inlet, a pure water inlet, and a concentrated water inlet at the other end for connecting the inside and outside of the cylinder.

[0007] A cylindrical cover is disposed on the first opening and is used to seal the first opening;

[0008] A filter assembly is disposed inside the cylinder. The filter assembly is used to filter natural water and produce pure water and concentrated water. There is a water-passing jacket between the filter assembly and the cylinder for the flow of pure water. The filter assembly has a hollow channel inside, and a concentrated water pipe is provided in the hollow channel.

[0009] The filter assembly has an inlet and an outlet at each end;

[0010] A water channel conversion end cap is provided on the inlet side of the filter assembly. The water channel conversion end cap is used to separate natural water, concentrated water and pure water. The inlet of the filter assembly is connected to the natural water outlet through the water channel conversion end cap. The water-passing jacket and the concentrated water pipe are connected to the pure water outlet and the concentrated water outlet respectively through the water channel conversion end cap.

[0011] A pure water to concentrated water conversion component is provided on the outlet side of the filter assembly. The pure water to concentrated water conversion component is used to separate concentrated water and pure water. The outlet of the filter assembly is connected to the water-passing jacket and the concentrated water pipe through the pure water to concentrated water conversion component.

[0012] The beneficial effects of the first aspect of this utility model are as follows: By setting a water circuit conversion end cap and a pure water to concentrate conversion component as a connecting hub, water circuit switching is realized, integrating the flow of inlet water, pure water, and concentrate into one structural component, and realizing a universal filter element structure; at the same time, by simultaneously reducing the volume of the inlet water end and the concentrate end and increasing the volume of the pure water end, the solute at the inlet water end and the concentrate end is reduced. When all the solute at the inlet water end and the concentrate end has permeated into the concentrate end, the solvent at the pure water end increases. According to the formula concentration = solute / solvent, the decrease in solute leads to an increase in solvent, and the concentration at the pure water end will be greatly reduced, thereby achieving the effect of reducing the TDS of the first cup of water.

[0013] As some sub-solutions of the above technical solution, the water circuit conversion end cover is provided with a natural water flow channel, a pure water flow channel and a concentrated water flow channel; the natural water outlet is connected to the filter assembly through the natural water flow channel; the water-passing jacket is connected to the pure water outlet through the pure water flow channel; and the concentrated water outlet is connected to the concentrated water pipe through the concentrated water flow channel.

[0014] As some sub-solutions of the above technical solution, the filter element further includes a first sealing ring, the outer wall of the first sealing ring abutting against the inner wall of the cylinder, and the inner wall of the first sealing ring abutting against the outer wall of the water circuit conversion end cover.

[0015] As some sub-solutions of the above technical solution, the filter element further includes a pure water adapter, a second sealing ring, and a third sealing ring; the pure water adapter is disposed between the water circuit conversion end cap and the pure water outlet, and the water circuit conversion end cap is connected to the pure water outlet through the pure water adapter; the outer wall of the second sealing ring abuts against the inner wall of the pure water outlet, and the inner wall of the second sealing ring abuts against the outer wall of the pure water adapter; the outer wall of the third sealing ring abuts against the inner wall of the pure water adapter, and the inner wall of the third sealing ring abuts against the outer wall of the water circuit conversion end cap.

[0016] As some sub-solutions of the above technical solution, the filter element further includes a concentrate adapter, a fourth sealing ring, a fifth sealing ring, and a sixth sealing ring; the concentrate adapter is disposed between the water circuit conversion end cap and the concentrate pipe, and the concentrate pipe is connected to the water circuit conversion end cap through the concentrate adapter; the outer wall of the fourth sealing ring abuts against the inner wall of the concentrate adapter, and the inner wall of the fourth sealing ring abuts against the outer wall of the concentrate pipe; the outer wall of the fifth sealing ring abuts against the inner wall of the water circuit conversion end cap, and the inner wall of the fifth sealing ring abuts against the outer wall of the concentrate adapter; the inner wall of the sixth sealing ring abuts against the outer wall of the concentrate adapter, and the outer wall of the sixth sealing ring abuts against the inner wall of the filter assembly.

[0017] As some sub-solutions of the above technical solution, the pure water to concentrated water conversion component includes a pure water channel and a concentrated water channel; the outlet of the filter assembly is connected to the water-passing jacket through the pure water channel, and the outlet of the filter assembly is connected to the concentrated water pipe through the concentrated water channel.

[0018] As some sub-solutions of the above technical solution, the filter element further includes a seventh sealing ring, an eighth sealing ring, and a ninth sealing ring; the inner wall of the seventh sealing ring abuts against the outer wall of the pure water-concentrate conversion element, and the outer wall of the seventh sealing ring abuts against the inner wall of the filter assembly; the inner wall of the eighth sealing ring abuts against the outer wall of the concentrate pipe, and the outer wall of the eighth sealing ring abuts against the inner wall of the pure water-concentrate conversion element; the inner wall of the ninth sealing ring abuts against the outer wall of the pure water-concentrate conversion element, and the outer wall of the ninth sealing ring abuts against the inner wall of the cylinder.

[0019] As some sub-solutions of the above technical solution, the filtration assembly includes an RO filter element, a pure water drain pipe, and a concentrated water drain pipe; the RO filter element and the pure water drain pipe are arranged in layers, with the RO filter element being the outer layer of the filtration assembly and the pure water drain pipe being the inner layer of the filtration assembly; the gap between the RO filter element and the cylinder body is the water-passing interlayer; the RO filter element has a filter element inlet, a pure water drain hole, and a concentrated water drain hole; the filter element inlet is connected to the natural water outlet through the water circuit conversion end cap, the pure water drain hole is connected to the pure water-concentrate conversion component through the pure water drain pipe, and the concentrated water drain hole is connected to the pure water-concentrate conversion component through the concentrated water drain pipe.

[0020] As a sub-solution of the above technical solution, the volume of the concentrate pipe is smaller than the volume of the water-passing jacket.

[0021] A second aspect of this utility model provides a water purification device, including the filter element described in the above-described technical solutions.

[0022] The water purification device according to the second aspect embodiment of this utility model, since it includes the filter element of the above-mentioned technical solution, also has corresponding beneficial effects. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of the structure of the first aspect embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the water flow path of natural water within the filter element;

[0026] Figure 3 This is a schematic diagram of the water flow path for pure water within the filter cartridge.

[0027] Figure 4 This is a schematic diagram of the water flow path of the concentrated water in the filter element.

[0028] In the attached image:

[0029] 1-Cylinder body; 11-Cylinder cover; 12-Natural water inlet; 13-Pure water inlet; 14-Concentrate inlet;

[0030] 2-Filter assembly; 21-RO filter element; 22-Pure water drain hole; 23-Pure water drain pipe; 24-Concentrate drain hole; 25-Concentrate drain pipe;

[0031] 3-Water-permeable interlayer;

[0032] 4-Concentrate pipe;

[0033] 5-Water circuit conversion end cap; 51-Pure water adapter; 52-Concentrate adapter;

[0034] 6-Pure water to concentrated water converter;

[0035] M1 - First sealing ring; M2 - Second sealing ring; M3 - Third sealing ring; M4 - Fourth sealing ring; M5 - Fifth sealing ring; M6 - Sixth sealing ring; M7 - Seventh sealing ring; M8 - Eighth sealing ring; M9 - Ninth sealing ring. Detailed Implementation

[0036] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0037] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] In the description of this utility model, "several" means an indefinite quantity, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the order of the indicated technical features. The use of "and / or" throughout the text indicates three parallel solutions; for example, A and / or B indicates a solution satisfied by A, a solution satisfied by B, or a solution satisfied by both A and B.

[0039] In the description of this utility model, if there is a short phrase containing multiple parallel features, the modifier in the phrase defines the closest feature. For example, "B, C, and E connected to D are set on A" means that B is set on A, E is connected to D, and C is not defined. However, modifiers indicating the relationship between features, such as "interval setting" or "circular arrangement," do not fall into this category. Modifiers preceded by "all" define all features in the short phrase. For example, "B, C, and D are all set on A" means that B, C, and D are all set on A. In statements where the subject is omitted, the omitted subject is the subject of the preceding statement. That is, "A has B and includes C" means that A has B and A includes C.

[0040] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0041] The following is combined Figures 1 to 4 The embodiments of this utility model are described below.

[0042] One type of filter element in this embodiment includes:

[0043] The cylinder 1 is hollow inside. One end of the cylinder 1 has a first opening, and the other end of the cylinder 1 has a natural water inlet 12, a pure water inlet 13 and a concentrated water inlet 14 for connecting the inside and outside of the cylinder 1.

[0044] A cylinder cover 11 is provided on the first opening and is used to seal the first opening.

[0045] The filter assembly 2 is located inside the cylinder 1. The filter assembly 2 is used to filter natural water and produce pure water and concentrated water. There is a water-passing jacket 3 between the filter assembly 2 and the cylinder 1 for the flow of pure water. The filter assembly 2 has a hollow channel inside, and a concentrated water pipe 4 is installed in the hollow channel. The two ends of the filter assembly 2 have an inlet and an outlet respectively.

[0046] Water circuit conversion end cap 5 is located on the inlet side of the filter assembly 2. Water circuit conversion end cap 5 is used to separate natural water, concentrated water and pure water. The inlet of the filter assembly 2 is connected to the natural water outlet 12 through the water circuit conversion end cap 5. The water-passing jacket 3 and the concentrated water pipe 4 are connected to the pure water outlet 13 and the concentrated water outlet 14 respectively through the water circuit conversion end cap 5.

[0047] The pure water to concentrated water conversion component 6 is located on the outlet side of the filter assembly 2. The pure water to concentrated water conversion component 6 is used to separate concentrated water and pure water. The outlet of the filter assembly 2 is connected to the water jacket 3 and the concentrated water pipe 4 through the pure water to concentrated water conversion component 6.

[0048] The cylinder 1 is hollow inside, with a first opening at one end. A detachable cover 11 is mounted on this first opening to seal this end of the cylinder 1. The end with the cover 11 is used to open the filter element for internal maintenance. The other end of the cover 11 has a natural water inlet 12, a pure water inlet 13, and a concentrated water inlet 14, which connect the external water supply to the inside of the filter element. The filter assembly 2 is located in the hollow area inside the cylinder 1. A water-passing jacket 3 for pure water flow exists between the filter assembly 2 and the cylinder 1. The filter assembly 2 is located inside... It also features a hollow channel with a concentrate pipe 4 for flowing concentrated water. The filter assembly 2 is the core of the filter element, responsible for filtering natural water and separating it into pure water and concentrated water. Pure water flows out through the water-passing jacket 3, while concentrated water flows out through the concentrate pipe 4. The filter assembly 2 has an inlet and an outlet at both ends, with the outlet near the cylinder cover 11 and the inlet near the natural water outlet 12. The water path conversion end cover 5 is located on the inlet side of the filter assembly 2, serving to distribute and convert water flow. It receives natural water entering from the natural water outlet 12 and guides it to the inlet of the filter assembly 2. At the same time, it is also responsible for guiding the filtered pure water and concentrated water to the pure water outlet 13 and the concentrated water outlet 14, respectively. The pure water and concentrated water conversion component 6 is located on the outlet side of the filter assembly 2 for separating concentrated water and pure water.

[0049] When the filter element is working, natural water enters the filter element through the natural water inlet 12, and then passes through the water circuit conversion end cover 5 into the filter assembly 2. In the filter assembly 2, the natural water is filtered into pure water and concentrated water. The pure water and concentrated water are then separated in the pure water-concentrate conversion component 6, and flow into the water passage jacket 3 and the concentrated water pipe 4 respectively. The water is then transported through the water passage jacket 3 and the concentrated water pipe 4 to the water circuit conversion end cover 5, and finally output from the pure water inlet 13 and the concentrated water inlet 14. By setting the water circuit conversion end cover 5 and the pure water-concentrate conversion component 6 as a connecting hub, precise flow control of natural water, concentrated water, and pure water in the filter element is achieved, integrating water circuit control into two structural components.

[0050] Specifically, the water circuit conversion end cover 5 is equipped with a natural water flow channel, a pure water flow channel, and a concentrated water flow channel; the natural water inlet 12 is connected to the filter assembly 2 through the natural water flow channel; the water passage jacket 3 is connected to the pure water inlet 13 through the pure water flow channel; and the concentrated water inlet 14 is connected to the concentrated water pipe 4 through the concentrated water flow channel. The water flows along the water passage jacket 3 to the outside of the water circuit conversion end cover 5. To facilitate the discharge of pure water, the pure water flow channel is designed to be arranged in the longitudinal direction, so that the pure water in the water passage jacket 3 can be guided back to the center of the water circuit conversion end cover 5 and then turned to be discharged from the pure water inlet 13; in contrast, the concentrated water flow channel is designed to be arranged in the transverse direction, so that the concentrated water in the concentrated water pipe 4 can be directly guided to the concentrated water inlet 14 for discharge; by adopting the design of longitudinal and transverse flow channels, the inlet flow channel, pure water flow channel, and concentrated water flow channel are integrated into one structural component, realizing the universality of the existing filter element water circuit structure and the water circuit structure of the whole machine water circuit board.

[0051] Specifically, the filter element also includes a first sealing ring M1. The outer wall of the first sealing ring M1 abuts against the inner wall of the cylinder 1, and the inner wall of the first sealing ring M1 abuts against the outer wall of the water circuit conversion end cover 5. The first sealing ring M1 is used to seal the gap between the water circuit conversion end cover 5 and the cylinder 1 to ensure the airtightness of the filter element.

[0052] Specifically, the filter element also includes a pure water adapter 51, a second sealing ring M2, and a third sealing ring M3. The pure water adapter 51 is located between the water circuit conversion end cover 5 and the pure water outlet 13, and the water circuit conversion end cover 5 is connected to the pure water outlet 13 through the pure water adapter 51. The outer wall of the second sealing ring M2 abuts against the inner wall of the pure water outlet 13, and the inner wall of the second sealing ring M2 abuts against the outer wall of the pure water adapter 51. The outer wall of the third sealing ring M3 abuts against the inner wall of the pure water adapter 51, and the inner wall of the third sealing ring M3 abuts against the outer wall of the water circuit conversion end cover 5. The pure water adapter 51 is used to connect the water circuit conversion end cover 5 and the pure water outlet 13, and is used to control the delivery of pure water and ensure a stable connection between the water circuit conversion end cover 5 and the pure water outlet 13. When pure water is being discharged, the pure water adapter 51 is opened, and pure water can be smoothly discharged from the water circuit conversion end cover 5 to the pure water outlet 13. The connection and disconnection of pure water output are realized through the pure water adapter 51. The second sealing ring M2 is used to seal the gap between the pure water adapter 51 and the pure water outlet 13, and the third sealing ring M3 is used to seal the gap between the pure water adapter 51 and the water circuit conversion end cover 5.

[0053] Specifically, the filter element also includes a concentrate adapter 52, a fourth sealing ring M4, a fifth sealing ring M5, and a sixth sealing ring M6; the concentrate adapter 52 is disposed between the water circuit conversion end cover 5 and the concentrate pipe 4, and the concentrate pipe 4 is connected to the water circuit conversion end cover 5 through the concentrate adapter 52; the outer wall of the fourth sealing ring M4 abuts against the inner wall of the concentrate adapter 52, and the inner wall of the fourth sealing ring M4 abuts against the outer wall of the concentrate pipe 4; the outer wall of the fifth sealing ring M5 abuts against the inner wall of the water circuit conversion end cover 5, and the inner wall of the fifth sealing ring M5 abuts against the outer wall of the concentrate adapter 52; the inner wall of the sixth sealing ring M6 abuts against the outer wall of the concentrate adapter 52, and the outer wall of the sixth sealing ring M6 abuts against the inner wall of the filter assembly 2. The concentrate adapter 52 is used to connect the water circuit conversion end cap 5 and the concentrate pipe 4, controlling the delivery of concentrate and ensuring a stable connection between the water circuit conversion end cap 5 and the concentrate pipe 4. When concentrate is being discharged, the concentrate adapter 52 opens, allowing concentrate to flow smoothly from the concentrate outlet 14 to the water circuit conversion port, and then out of the concentrate outlet 14. The concentrate adapter 52 enables the connection and disconnection of concentrate output. The fourth sealing ring M4 seals the gap between the concentrate adapter 52 and the water circuit conversion end cap 5, the fifth sealing ring M5 seals the gap between the concentrate adapter 52 and the concentrate pipe 4, and the sixth sealing ring M6 seals the gap between the concentrate adapter 52 and the filter assembly 2.

[0054] Specifically, the pure water to concentrated water conversion component 6 includes a pure water channel and a concentrated water channel; the outlet of the filter assembly 2 is connected to the water-passing jacket 3 through the pure water channel, and the outlet of the filter assembly 2 is connected to the concentrated water pipe 4 through the concentrated water channel. The pure water filtered by the filter assembly 2 enters the water-passing jacket 3 through the pure water channel, while the concentrated water filtered by the filter assembly 2 enters the concentrated water pipe 4 through the concentrated water channel. The pure water to concentrated water conversion component 6 serves as the connecting hub inside the filter element, realizing the conversion and distribution of water flow inside the filter element.

[0055] Specifically, the filter element also includes a seventh sealing ring M7, an eighth sealing ring M8, and a ninth sealing ring M9. The inner wall of the seventh sealing ring M7 abuts against the outer wall of the pure water-to-concentrate conversion element 6, and the outer wall of the seventh sealing ring M7 abuts against the inner wall of the filter assembly 2. The inner wall of the eighth sealing ring M8 abuts against the outer wall of the concentrate pipe 4, and the outer wall of the eighth sealing ring M8 abuts against the inner wall of the pure water-to-concentrate conversion element 6. The inner wall of the ninth sealing ring M9 abuts against the outer wall of the pure water-to-concentrate conversion element 6, and the outer wall of the ninth sealing ring M9 abuts against the inner wall of the cylinder 1. The seventh sealing ring M7 is used to seal the gap between the pure water-to-concentrate conversion element 6 and the filter assembly 2, while the eighth sealing ring M8 is used to seal the gap between the concentrate pipe 4 and the pure water-to-concentrate conversion element 6, preventing contamination caused by concentrate leakage. The ninth sealing ring M9 is used to seal the gap between the pure water-to-concentrate conversion element 6 and the cylinder 1.

[0056] It should be noted that steps are set at all the installation positions of the sealing rings. The sealing rings are snapped onto 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.

[0057] Specifically, the filter assembly 2 includes an RO filter element 21, a pure water drain pipe 23, and a concentrated water drain pipe 25; the RO filter element 21 and the pure water drain pipe 23 are arranged in layers, with the RO filter element 21 being the outer layer of the filter assembly 2 and the pure water drain pipe 23 being the inner layer of the filter assembly 2; the gap between the RO filter element 21 and the cylinder 1 is a water-passing interlayer 3; the RO filter element 21 has a filter element inlet, a pure water drain hole 22, and a concentrated water drain hole 24; the filter element inlet is connected to the natural water outlet 12 through the water circuit conversion end cap 5, the pure water drain hole 22 is connected to the pure water-concentrate conversion component 6 through the pure water drain pipe 23, and the concentrated water drain hole 24 is connected to the pure water-concentrate conversion component 6 through the concentrated water drain pipe 25.

[0058] RO filter element 21 is used to filter natural water, separating it into pure water and concentrated water. Pure water is discharged through pure water drain hole 22 and enters the pure water-concentrate conversion element 6 through pure water drain pipe 23. Concentrate water is discharged through concentrated water drain hole 24 and enters the pure water-concentrate conversion element 6 through concentrated water drain pipe 25. RO filter element 21 uses reverse osmosis technology, which can effectively remove impurities, bacteria, viruses and other harmful substances from the water. The pure water drain hole 22 and concentrated water drain hole 24 achieve precise separation of natural water, while the pure water drain pipe 23 and concentrated water drain pipe 25 ensure stable transmission of pure water and concentrated water.

[0059] Specifically, the volume of the concentrate pipe 4 is smaller than the volume of the water-passing interlayer 3.

[0060] By increasing the volume of the water-passing jacket 3, the volume of pure water in the filter element is increased, while the volume of concentrated water in the filter element is reduced simultaneously. Pure water and concentrated water are solvents, and impurities are solutes. After filtration, the solute in the pure water decreases, and the pure water solvent increases after the pure water and concentrated water are separated. According to the concentration calculation formula, that is, the concentration equals the solute divided by the solvent, when the amount of solute decreases and the amount of solvent increases, the concentration of pure water will be significantly reduced, so as to meet the usage requirements.

[0061] A second aspect of this utility model provides a water purification device, including filter elements from the above-described technical solutions.

[0062] The water purification device according to the second aspect embodiment of this utility model, since it includes the filter element of the above-mentioned technical solution, also has corresponding beneficial effects.

[0063] The preferred embodiments of the present invention have been described in detail above, but the present disclosure 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 the present disclosure.

Claims

1. A filter element, characterized in that, include: The cylinder (1) is hollow inside. One end of the cylinder (1) has a first opening, and the other end of the cylinder (1) is provided with a natural water inlet (12), a pure water inlet (13) and a concentrated water inlet (14) for connecting the inside and outside of the cylinder (1). A cylindrical cover (11) is provided on the first opening, and the cylindrical cover (11) is used to seal the first opening; A filter assembly (2) is disposed inside the cylinder (1). The filter assembly (2) is used to filter natural water and produce pure water and concentrated water. There is a water-passing jacket (3) between the filter assembly (2) and the cylinder (1) for the flow of pure water. The filter assembly (2) has a hollow channel inside, and a concentrated water pipe (4) is provided in the hollow channel. The filter assembly (2) has an inlet and an outlet at both ends. A water path conversion end cap (5) is provided on the inlet side of the filter assembly (2). The water path conversion end cap (5) is used to separate natural water, concentrated water and pure water. The inlet of the filter assembly (2) is connected to the natural water outlet (12) through the water path conversion end cap (5). The water-passing jacket (3) and the concentrated water pipe (4) are connected to the pure water outlet (13) and the concentrated water outlet (14) respectively through the water path conversion end cap (5). A pure water to concentrated water conversion component (6) is provided on the outlet side of the filter assembly (2). The pure water to concentrated water conversion component (6) is used to separate concentrated water and pure water. The outlet of the filter assembly (2) is connected to the water-passing jacket (3) and the concentrated water pipe (4) through the pure water to concentrated water conversion component (6).

2. The filter element according to claim 1, characterized in that: The water circuit conversion end cap (5) is provided with a natural water flow channel, a pure water flow channel and a concentrated water flow channel; the natural water outlet (12) is connected to the filter assembly (2) through the natural water flow channel; the water-passing jacket (3) is connected to the pure water outlet (13) through the pure water flow channel; the concentrated water outlet (14) is connected to the concentrated water pipe (4) through the concentrated water flow channel.

3. The filter element according to claim 1, characterized in that: The filter element also includes a first sealing ring (M1), the outer wall of which abuts against the inner wall of the cylinder (1), and the inner wall of which abuts against the outer wall of the water circuit conversion end cap (5).

4. The filter element according to claim 1, characterized in that: The filter element also includes a pure water adapter (51), a second sealing ring (M2), and a third sealing ring (M3); the pure water adapter (51) is disposed between the water circuit conversion end cap (5) and the pure water outlet (13), and the water circuit conversion end cap (5) is connected to the pure water outlet (13) through the pure water adapter (51); the outer wall of the second sealing ring (M2) abuts against the inner wall of the pure water outlet (13), and the inner wall of the second sealing ring (M2) abuts against the outer wall of the pure water adapter (51); the outer wall of the third sealing ring (M3) abuts against the inner wall of the pure water adapter (51), and the inner wall of the third sealing ring (M3) abuts against the outer wall of the water circuit conversion end cap (5).

5. The filter element according to claim 1, characterized in that: The filter element also includes a concentrate adapter (52), a fourth sealing ring (M4), a fifth sealing ring (M5), and a sixth sealing ring (M6); the concentrate adapter (52) is disposed between the water circuit conversion end cap (5) and the concentrate pipe (4), and the concentrate pipe (4) is connected to the water circuit conversion end cap (5) through the concentrate adapter (52); the outer wall of the fourth sealing ring (M4) abuts against the inner wall of the concentrate adapter (52), and the inner wall of the fourth sealing ring (M4) abuts against the outer wall of the concentrate pipe (4); the outer wall of the fifth sealing ring (M5) abuts against the inner wall of the water circuit conversion end cap (5), and the inner wall of the fifth sealing ring (M5) abuts against the outer wall of the concentrate adapter (52); the inner wall of the sixth sealing ring (M6) abuts against the outer wall of the concentrate adapter (52), and the outer wall of the sixth sealing ring (M6) abuts against the inner wall of the filter assembly (2).

6. The filter element according to claim 1, characterized in that: The pure water to concentrated water conversion component (6) includes a pure water channel and a concentrated water channel; the outlet of the filter assembly (2) is connected to the water-passing jacket (3) through the pure water channel, and the outlet of the filter assembly (2) is connected to the concentrated water pipe (4) through the concentrated water channel.

7. The filter element according to claim 1, characterized in that: The filter element also includes a seventh sealing ring (M7), an eighth sealing ring (M8), and a ninth sealing ring (M9); the inner wall of the seventh sealing ring (M7) abuts against the outer wall of the pure water to concentrate conversion component (6), and the outer wall of the seventh sealing ring (M7) abuts against the inner wall of the filter assembly (2); the inner wall of the eighth sealing ring (M8) abuts against the outer wall of the concentrate pipe (4), and the outer wall of the eighth sealing ring (M8) abuts against the inner wall of the pure water to concentrate conversion component (6); the inner wall of the ninth sealing ring (M9) abuts against the outer wall of the pure water to concentrate conversion component (6), and the outer wall of the ninth sealing ring (M9) abuts against the inner wall of the cylinder (1).

8. The filter element according to claim 1, characterized in that: The filter assembly (2) includes an RO filter element (21), a pure water drain pipe (23), and a concentrated water drain pipe (25); the RO filter element (21) and the pure water drain pipe (23) are arranged in layers, the RO filter element (21) is the outer layer of the filter assembly (2), and the pure water drain pipe (23) is the inner layer of the filter assembly (2); the gap between the RO filter element (21) and the cylinder (1) is the water-passing jacket (3); the RO filter element (21) has a filter element inlet hole, a pure water drain hole (22), and a concentrated water drain hole (24); the filter element inlet hole is connected to the natural water outlet (12) through the water circuit conversion end cap (5), the pure water drain hole (22) is connected to the pure water and concentrated water conversion component (6) through the pure water drain pipe (23), and the concentrated water drain hole (24) is connected to the pure water and concentrated water conversion component (6) through the concentrated water drain pipe (25).

9. The filter element according to claim 1, characterized in that: The volume of the concentrated water pipe (4) is smaller than the volume of the water-passing interlayer (3).

10. A water purification device, characterized in that, Includes the filter element as described in any one of claims 1-9.

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