Filter element structure and water purifier

Abstract

The utility model provides a filter element structure and a water purifier. The filter element structure comprises a filter element shell, a first filter element and a second filter element, a raw water channel is formed between the RO membrane filter element and the inner wall of the filter element shell, the raw water channel is communicated with the raw water inlet, the center of the RO membrane filter element is provided with a pure water channel, and the concentrated water end of the RO membrane filter element is communicated with the concentrated water outlet; the pure water countercurrent device comprises a countercurrent shell, a pressing plate and an elastic piece, one end of the countercurrent shell is provided with a countercurrent channel, the countercurrent channel is communicated with the interior of the countercurrent shell, and the countercurrent channel is communicated with the pure water channel; the pressing plate is arranged in the reverse flow shell, the peripheral face of the pressing plate is in sealed connection with the inner wall of the reverse flow shell, the elastic piece is arranged in the reverse flow shell and abuts against the pressing plate, and the pressing plate is located between the elastic piece and the reverse flow channel. By means of the pure water countercurrent device, pure water countercurrent can be achieved, concentrated water remaining on the RO membrane filter element is discharged, the forward osmosis phenomenon is relieved, and therefore the TDS value of a first cup of water is reduced, and the effect is good.

Description

Technical Field

[0001] The present application relates to a water purification device, and in particular to a filter element structure and a water purifier. Background Art

[0002] At present, people have higher and higher requirements for domestic drinking water. For this reason, many families are equipped with various water purification devices, and reverse osmosis water purifiers are becoming more and more popular in household use. Reverse osmosis water purifiers use reverse osmosis filter elements (RO filter elements) for filtration. Due to reasons such as concentration polarization during the static process of reverse osmosis water purifiers, forward osmosis may occur.

[0003] In order to slow down the occurrence of forward osmosis, most of the reverse osmosis water purifiers on the market are currently equipped with a flushing mode, that is, pure water is refluxed to the tap water end to dilute the tap water and flush the reverse osmosis membrane. Although the refluxed pure water can dilute the concentration of tap water, it cannot slow down the forward osmosis phenomenon, resulting in poor effects. Summary of the Invention

[0004] The embodiments of the present application provide a filter element structure and a water purifier to solve the problems existing in the related art. The technical solutions are as follows:

[0005] In a first aspect, the embodiments of the present application provide a filter element structure, including:

[0006] A filter element housing, on which a raw water inlet, a concentrated water outlet and a pure water outlet are provided;

[0007] An RO membrane filter element is arranged inside the filter element housing. A raw water channel is formed between the RO membrane filter element and the inner wall of the filter element housing. The raw water channel is communicated with the raw water inlet. The center of the RO membrane filter element has a pure water channel. One end of the pure water channel is communicated with the pure water outlet. The concentrated water end of the RO membrane filter element is connected to the concentrated water outlet;

[0008] A pure water countercurrent device is arranged inside the filter element housing. The pure water countercurrent device includes a countercurrent housing, a pressing plate and an elastic member. One end of the countercurrent housing has a countercurrent channel. The countercurrent channel is communicated with the inside of the countercurrent housing. The countercurrent channel is communicated with the other end of the pure water channel; The pressing plate is arranged inside the countercurrent housing. The outer peripheral surface of the pressing plate is sealingly connected to the inner wall of the countercurrent housing; The elastic member is arranged inside the countercurrent housing. The elastic member abuts against the pressing plate. The pressing plate is located between the countercurrent channel and the elastic member. The pressing plate can move between the countercurrent channel and the elastic member.

[0009] In an embodiment, the pure water countercurrent device further includes:

[0010] Positioning components, the positioning components include two positioning posts, one of the positioning posts is fixed on the pressing plate, the other positioning post is fixed on the countercurrent housing, and the two positioning posts are arranged opposite to each other. The two ends of the elastic member are respectively sleeved on the two positioning posts.

[0011] In one embodiment, the pure water countercurrent device further includes a first sealing component, the first sealing component is arranged on the outer peripheral surface of the pressing plate, and the pressing plate is hermetically connected to the inner wall of the countercurrent housing through the first sealing component.

[0012] In one embodiment, the first sealing component includes a first sealing groove and a first sealing ring. The first sealing groove is arranged on the outer peripheral surface of the pressing plate, the first sealing ring is installed in the first sealing groove, and the first sealing groove is hermetically connected to the inner wall of the countercurrent housing through the first sealing ring.

[0013] In one embodiment, the countercurrent housing includes a countercurrent upper end cover and a countercurrent lower end cover. The countercurrent lower end cover is hermetically connected to the countercurrent upper end cover. There is a countercurrent column on the countercurrent lower end cover, and the countercurrent channel is located inside the countercurrent column.

[0014] In one embodiment, the pure water countercurrent device further includes a second sealing component. The second sealing component includes a second sealing groove and a second sealing ring. The second sealing groove is arranged on the outer peripheral surface of the countercurrent upper end cover, the second sealing ring is installed in the second sealing groove, and the second sealing groove is hermetically connected to the countercurrent upper end cover through the second sealing ring.

[0015] In one embodiment, there is an installation recess on the countercurrent upper end cover. One end of the RO membrane filter element is placed in the installation recess. There is a water flow channel on the countercurrent upper end cover, and the raw water channel is communicated with the water flow channel. The tap water entering the raw water channel can enter the inside of the RO membrane filter element through the water flow channel.

[0016] In one embodiment, the filter element structure further includes a concentrated water end cover. The concentrated water end cover is installed at the concentrated water end of the RO membrane filter element. The concentrated water end cover is hermetically connected to the RO membrane filter element and hermetically connected to the inner wall of the filter element housing. There is a concentrated water channel on the concentrated water end cover that is communicated with the concentrated water outlet.

[0017] In one embodiment, a third sealing component is installed at the concentrated water end of the RO membrane filter element. The inner wall of the concentrated water end cover is hermetically connected to the RO membrane filter element through the third sealing component; a fourth sealing member is installed on the outer peripheral surface of the concentrated water end cover, and the outer peripheral surface of the concentrated water end cover is hermetically connected to the inner wall of the filter element housing through the fourth sealing member.

[0018] In a second aspect, an embodiment of the present application provides a water purifier, including the filter element structure described in any one of the above.

[0019] The advantages or beneficial effects in the above technical solutions at least include:

[0020] The filter element structure of the embodiment of the present application includes a filter element housing, an RO membrane filter element and a pure water countercurrent device. The pure water countercurrent device includes a countercurrent housing, a pressing plate and an elastic member. One end of the countercurrent housing has a countercurrent channel, and the countercurrent channel is communicated with the pure water channel; the pressing plate is arranged in the countercurrent housing. The elastic member abuts against the pressing plate, and the pressing plate is located between the elastic member and the countercurrent channel, and the pressing plate can move between the countercurrent channel and the elastic member. Since the filter element housing is provided with a raw water inlet, a concentrated water outlet and a pure water outlet, the tap water passing through the raw water inlet first enters the inside of the RO membrane filter element through the raw water channel for filtration. The filtered pure water enters the pure water channel. Part of the pure water is output through the pure water outlet, and part of the pure water enters the inside of the countercurrent housing through the countercurrent channel. Under the action of water pressure, the pressing plate is pushed and the elastic member is compressed, so that part of the pure water is stored inside the countercurrent housing. When the entry of tap water stops, the pure water pressure disappears. Under the action of the elastic force of the elastic member and the atmospheric pressure inside the countercurrent housing, the pure water is extruded out of the countercurrent housing. The extruded pure water enters the pure water channel and flows back to the concentrated water end through the RO membrane of the RO membrane filter element, and the concentrated water at the concentrated water end is discharged. The pure water countercurrent device in the embodiment of the present application can make the pure water flow countercurrently, discharge the concentrated water remaining in the RO membrane filter element, slow down the forward osmosis phenomenon, thereby reducing the TDS value of the first glass of water, and the effect is better.

[0021] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the drawings, unless otherwise specified, the same reference numerals throughout the several views denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0023] Figure 1 It is a schematic structural diagram of the filter element structure;

[0024] Figure 2 It is another schematic structural diagram of the filter element structure;

[0025] Figure 3 It is a schematic structural diagram of the pure water countercurrent device;

[0026] Description of the reference numerals:

[0027] 1. Filter element housing; 11. Raw water inlet; 12. Concentrate water outlet; 13. Pure water outlet; 2. RO membrane filter element; 3. Raw water channel; 21. Pure water channel; 4. Pure water countercurrent device; 41. Countercurrent housing; 42. Pressing plate; 43. Elastic member; 44. Countercurrent channel; 45. Positioning assembly; 451. Positioning post; 46. First sealing assembly; 461. First sealing groove; 462. First sealing ring; 411. Countercurrent upper end cover; 412. Countercurrent lower end cover; 413. Countercurrent column; 5. Second sealing assembly; 51. Second sealing groove; 52. Second sealing ring; 414. Installation recess; 415. Water flow channel; 7. Concentrate water end cover; 71. Concentrate water channel; 8. Third sealing assembly; 81. Third sealing groove; 82. Third sealing ring; 9. Fourth sealing member; 91. Fourth sealing groove; 912. Fourth sealing ring; 14. Filter element barrel; 15. Filter element cover. Detailed implementation mode

[0028] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0029] Embodiment 1:

[0030] As Figures 1 to 3 shown, the embodiment of the present application provides a filter element structure, including: a filter element housing 1, on which a raw water inlet 11, a concentrate water outlet 12 and a pure water outlet 13 are provided; an RO membrane filter element 2, arranged inside the filter element housing 1, a raw water channel 3 is formed between the RO membrane filter element 2 and the inner wall of the filter element housing 1, the raw water channel 3 is communicated with the raw water inlet 11, the center of the RO membrane filter element 2 has a pure water channel 21, one end of the pure water channel 21 is communicated with the pure water outlet 13, and the concentrate water end of the RO membrane filter element 2 is communicated with the concentrate water outlet 12; a pure water countercurrent device 4, arranged inside the filter element housing 1, the pure water countercurrent device 4 includes a countercurrent housing 41, a pressing plate 42 and an elastic member 43, one end of the countercurrent housing 41 has a countercurrent channel 44, the countercurrent channel 44 is communicated with the inside of the countercurrent housing 41, and the countercurrent channel 44 is communicated with the other end of the pure water channel 21; the pressing plate 42 is arranged inside the countercurrent housing 41, and the outer peripheral surface of the pressing plate 42 is hermetically connected with the inner wall of the countercurrent housing 41; the elastic member 43 is arranged inside the countercurrent housing 41, the elastic member 43 abuts against the pressing plate 42, the pressing plate 42 is located between the countercurrent channel 44 and the elastic member 43, and the pressing plate 42 can move between the countercurrent channel 44 and the elastic member 43.

[0031] Since the filter element housing 1 is provided with a raw water inlet 11, a concentrated water outlet 12 and a pure water outlet 13, the tap water entering through the raw water inlet 11 first enters the interior of the RO membrane filter element 2 through the raw water channel 3 for filtration. The filtered pure water enters the pure water channel 21. Part of the pure water is output through the pure water outlet 13, and part of the pure water enters the interior of the countercurrent housing 41 through the countercurrent channel 44. Under the action of water pressure, the pressing plate 42 is pushed and the elastic member 43 is compressed, so that part of the pure water is stored in the interior of the countercurrent housing 41. When the entry of tap water stops, the pure water water pressure disappears. Under the action of the elastic force of the elastic member 43 and the atmospheric pressure in the countercurrent housing 41, the pure water is extruded out of the countercurrent housing 41. The extruded pure water enters the pure water channel 21 and then flows back to the concentrated water end through the RO membrane of the RO membrane filter element 2, and the concentrated water at the concentrated water end is discharged. Through the pure water countercurrent device 4 in the embodiment of the present application, the pure water can flow back, discharging the concentrated water remaining in the RO membrane filter element 2, slowing down the forward osmosis phenomenon, thereby reducing the TDS value of the first glass of water, and the effect is better.

[0032] In one embodiment, the elastic member 43 is a spring. In order to position the spring, the pure water countercurrent device 4 further includes a positioning assembly 45. The positioning assembly 45 includes two positioning posts 451. One of the positioning posts 451 is fixed on the pressing plate 42, and the other positioning post 451 is fixed on the countercurrent housing 41, and the two positioning posts 451 are arranged oppositely. Both ends of the elastic member 43 are respectively sleeved on the two positioning posts 451.

[0033] Preferably, the number of the positioning assemblies 45 and the elastic members 43 is four. Both ends of the four elastic members 43 are respectively sleeved on the positioning posts 451 of the corresponding positioning assemblies 45, and the four positioning assemblies 45 are evenly distributed around the center of the pressing plate 42.

[0034] The pressing plate 42 of the embodiment of the present application is hermetically connected to the inner wall of the countercurrent housing 41. In order to achieve the hermetic connection between the pressing plate 42 and the inner wall of the countercurrent housing 41, the pure water countercurrent device 4 further includes a first sealing assembly 46. The first sealing assembly 46 is arranged on the outer peripheral surface of the pressing plate 42, and the pressing plate 42 is hermetically connected to the inner wall of the countercurrent housing 41 through the first sealing assembly 46.

[0035] In one embodiment, the first sealing assembly 46 includes a first sealing groove 461 and a first sealing ring 462. The first sealing groove 461 is provided on the outer peripheral surface of the pressing plate 42, and the first sealing ring 462 is installed in the first sealing groove 461. The first sealing groove 461 is hermetically connected to the inner wall of the countercurrent housing 41 through the first sealing ring 462. Preferably, the number of both the first sealing groove 461 and the first sealing ring 462 is two, and the two first sealing rings 462 are respectively installed in the two first sealing grooves 461. In this embodiment, the sealing connection between the pressing plate 42 and the inner wall of the countercurrent housing 41 is realized through the setting of the first sealing assembly 46, avoiding pure water from entering the countercurrent housing 41 through the pores between the pressing plate 42 and the countercurrent housing 41.

[0036] In one embodiment, the countercurrent housing 41 includes a countercurrent upper end cover 411 and a countercurrent lower end cover 412. The countercurrent lower end cover 412 is hermetically connected to the countercurrent upper end cover 411. The countercurrent lower end cover 412 has a countercurrent column 413, and the countercurrent channel 44 is located inside the countercurrent column 413. In order to realize the sealing connection between the countercurrent lower end cover 412 and the countercurrent upper end cover 411, the pure water countercurrent device 4 further includes a second sealing assembly 5. The second sealing assembly 5 includes a second sealing groove 51 and a second sealing ring 52. The second sealing groove 51 is provided on the outer peripheral surface of the countercurrent upper end cover 411, and the second sealing ring 52 is installed in the second sealing groove 51. The second sealing groove 51 is hermetically connected to the countercurrent upper end cover 411 through the second sealing ring 52. Preferably, the number of both the second sealing groove 51 and the second sealing ring 52 is two, and the two second sealing rings 52 are respectively installed in the two second sealing grooves 51. Through the setting of the second sealing assembly 5, the countercurrent upper end cover 411 and the countercurrent lower end cover 412 are sealed, avoiding pure water from flowing out through the gap between the countercurrent upper end cover 411 and the countercurrent lower end cover 412.

[0037] The countercurrent upper end cover 411 has an installation recess 414, and one end of the RO membrane filter element 2 is placed in the installation recess 414. The countercurrent upper end cover 411 has a water flow channel 415, and the raw water channel 3 is communicated with the water flow channel 415. The tap water entering the raw water channel 3 can enter the inside of the RO membrane filter element 2 through the water flow channel 415. In order to prevent tap water from entering through the pores between the inner wall of the countercurrent upper end cover 411 and the RO membrane filter element 2, a waterproof tape can be wound around the countercurrent upper end cover 411.

[0038] The filter element structure further includes a concentrated water end cover 7. The concentrated water end cover 7 is installed at the concentrated water end of the RO membrane filter element 2. The concentrated water end cover 7 is hermetically connected to the RO membrane filter element 2 and hermetically connected to the inner wall of the filter element housing 1. The concentrated water end cover 7 has a concentrated water channel 71 communicated with the concentrated water outlet 12.

[0039] In order to achieve a sealed connection between the concentrated water end cap 7 and the RO membrane filter element 2, a third sealing assembly 8 is installed at the concentrated water end of the RO membrane filter element 2, and the inner wall of the concentrated water end cap 7 is hermetically connected to the RO membrane filter element 2 through the third sealing assembly 8. The third sealing assembly 8 includes a third sealing groove 81 and a third sealing ring 82. The third sealing ring 82 is disposed on the outer peripheral surface of the end of the RO membrane filter element 2, and the third sealing ring 82 is installed inside the third sealing groove 81.

[0040] In order to achieve a sealed connection between the concentrated water end cap 7 and the filter element housing 1, a fourth sealing member 9 is installed on the outer peripheral surface of the concentrated water end cap 7, and the outer peripheral surface of the concentrated water end cap 7 is hermetically connected to the inner wall of the filter element housing 1 through the fourth sealing member 9. The fourth sealing assembly includes a fourth sealing groove 91 and a fourth sealing ring 912. The fourth sealing ring 912 is disposed on the outer peripheral surface of the end of the RO membrane filter element 2, and the fourth sealing ring 912 is installed inside the fourth sealing groove 91. The number of both the third sealing ring 82 and the fourth sealing ring 912 is two. A waterproof tape is also wound around the outer peripheral surface of the concentrated water end cap 7.

[0041] In one embodiment, the filter element housing 1 includes a filter element barrel 14 and a filter element cover 15 connected to the filter element barrel 14. The raw water inlet 11, the concentrated water outlet 12, and the pure water outlet 13 are all provided on the filter element barrel 14.

[0042] When assembling the filter element structure of the embodiment of the present application, two first sealing rings 462 can be first installed on the pressing plate 42, and then one end of each of the four springs is respectively sleeved on the four positioning posts 451 on the pressing plate 42. Then the other end of each spring is respectively sleeved on the four positioning posts 451 of the countercurrent lower end cap 412, and two second sealing rings 52 are installed on the countercurrent lower end cap 412, and the countercurrent lower end cap 412 is assembled with the countercurrent upper end cap 411. Then two third sealing rings 82 are installed at the end of the RO membrane filter element 2, and the assembled pure water countercurrent device 4 is inserted into the tail end of the RO membrane filter element 2. Then two fourth sealing rings 912 are installed on the concentrated water end cap 7, the concentrated water end cap 7 is installed at the end of the RO membrane filter element 2, and a waterproof tape is wound around the concentrated water end cap 7.

[0043] In the water production mode of the filter element structure of the present application embodiment, the tap water passing through the raw water inlet 11 first enters the interior of the RO membrane filter element 2 through the raw water channel 3 for filtration. The filtered pure water enters the pure water channel 21. Part of the pure water is output through the pure water outlet 13, and part of the pure water enters the countercurrent housing 41 through the countercurrent channel 44. Under the action of water pressure, the pressing plate 42 is pushed and the elastic member 43 is compressed, so that part of the pure water is stored inside the countercurrent housing 41. When the entry of tap water stops, the countercurrent mode is entered. The pure water water pressure disappears. Under the action of the elastic force of the elastic member 43 and the atmospheric pressure inside the countercurrent housing 41, the pure water is extruded out of the countercurrent housing 41. The extruded pure water enters the pure water channel 21 and flows back to the concentrated water end through the RO membrane of the RO membrane filter element 2, discharging the concentrated water at the concentrated water end. The filter element structure can store a certain amount of pure water in the pure water countercurrent device 4 in the water production mode. When the water production stops, the pure water countercurrent device 4 can make the pure water flow back, discharging the concentrated water remaining at the concentrated water end of the RO membrane filter element 2, reducing the content of the concentrated water at the concentrated water end, slowing down the phenomenon of forward osmosis, thereby reducing the TDS value of the first glass of water, and the effect is better.

[0044] Embodiment 2:

[0045] The embodiment of the present application provides a water purifier, including the filter element structure described in the above Embodiment 1.

[0046] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0047] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0048] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various changes or substitutions, and these should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A filter element structure, characterized in that, Comprising: A filter element housing, on which a raw water inlet, a concentrated water outlet and a pure water outlet are provided; An RO membrane filter element, arranged inside the filter element housing. A raw water channel is formed between the RO membrane filter element and the inner wall of the filter element housing. The raw water channel is communicated with the raw water inlet. The center of the RO membrane filter element has a pure water channel. One end of the pure water channel is communicated with the pure water outlet. The concentrated water end of the RO membrane filter element is communicated with the concentrated water outlet; A pure water countercurrent device, arranged inside the filter element housing. The pure water countercurrent device includes a countercurrent housing, a pressing plate and an elastic member. One end of the countercurrent housing has a countercurrent channel, and the countercurrent channel is communicated with the inside of the countercurrent housing. The countercurrent channel is communicated with the other end of the pure water channel; The pressing plate is arranged inside the countercurrent housing, and the outer peripheral surface of the pressing plate is hermetically connected with the inner wall of the countercurrent housing; The elastic member is arranged inside the countercurrent housing. The elastic member abuts against the pressing plate. The pressing plate is located between the countercurrent channel and the elastic member, and the pressing plate can move between the countercurrent channel and the elastic member.

2. The filter element structure according to claim 1, characterized in that, The pure water countercurrent device further includes: A positioning assembly, which includes two positioning posts. One of the positioning posts is fixed on the pressing plate, and the other positioning post is fixed on the countercurrent housing. The two positioning posts are arranged oppositely, and both ends of the elastic member are respectively sleeved on the two positioning posts.

3. The filter element structure according to claim 1, wherein, The pure water countercurrent device further includes a first sealing assembly, which is arranged on the outer peripheral surface of the pressing plate. The pressing plate is hermetically connected with the inner wall of the countercurrent housing through the first sealing assembly.

4. The filter element structure according to claim 3, characterized in that, The first sealing assembly includes a first sealing groove and a first sealing ring. The first sealing groove is arranged on the outer peripheral surface of the pressing plate, and the first sealing ring is installed in the first sealing groove. The first sealing groove is hermetically connected with the inner wall of the countercurrent housing through the first sealing ring.

5. The filter element structure according to any one of claims 1 to 4, characterized in that, The countercurrent housing includes a countercurrent upper end cover and a countercurrent lower end cover. The countercurrent lower end cover is hermetically connected with the countercurrent upper end cover. The countercurrent lower end cover has a countercurrent post, and the countercurrent channel is located inside the countercurrent post.

6. The filter element structure according to claim 5, characterized in that, The pure water countercurrent device further includes a second sealing assembly, which includes a second sealing groove and a second sealing ring. The second sealing groove is arranged on the outer peripheral surface of the countercurrent upper end cover, and the second sealing ring is installed in the second sealing groove. The second sealing groove is hermetically connected with the countercurrent upper end cover through the second sealing ring.

7. The filter element structure according to claim 5, wherein, The countercurrent upper end cover has an installation recess. One end of the RO membrane filter element is placed in the installation recess. The countercurrent upper end cover has a water flow channel, and the raw water channel is communicated with the water flow channel. The tap water entering the raw water channel can enter the inside of the RO membrane filter element through the water flow channel.

8. The filter element structure according to any one of claims 1 to 4, characterized in that The filter element structure further includes a concentrated water end cover, which is installed at the concentrated water end of the RO membrane filter element. The concentrated water end cover is hermetically connected with the RO membrane filter element and hermetically connected with the inner wall of the filter element housing. The concentrated water end cover has a concentrated water channel communicated with the concentrated water outlet.

9. The filter element structure according to claim 8, wherein, A third sealing assembly is installed at the concentrated water end of the RO membrane filter element, and the inner wall of the concentrated water end cover is hermetically connected to the RO membrane filter element through the third sealing assembly; a fourth sealing member is installed on the outer peripheral surface of the concentrated water end cover, and the outer peripheral surface of the concentrated water end cover is hermetically connected to the inner wall of the filter element housing through the fourth sealing member.

10. Water purifier, characterized in that, It includes the filter element structure according to any one of claims 1 to 9.

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