CN214693563U

CN214693563U - Combined type composite filter element and water purifier with same

Info

Publication number: CN214693563U
Application number: CN202120368524.1U
Authority: CN
Inventors: 金海军; 那勤夫; 方锡奉; 鞠鹏
Original assignee: Bikelun Beijing Water Purification Technology Co ltd
Current assignee: Bikelun Beijing Water Purification Technology Co ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-11-12
Anticipated expiration: 2031-02-08

Abstract

The utility model belongs to the technical field of water purification filter core equipment, a modular composite filter core and water purifier that has it are disclosed, including first filter core and second filter core, first filter core has first mouth of a river end and connects mouth of a river end and inside mutual separation be equipped with leading filter media structure and rearmounted filter media structure, the second filter core has second mouth of a river end and inside reverse osmosis filter media structure that is equipped with, the second mouth of a river end of second filter core is pegged graft the connection mouth of a river end of first filter core and with the inside water route intercommunication of first filter core, form a whole. According to the combined composite filter element provided by the invention, the two filter elements are inserted and assembled into a whole through the outside, so that not only can one integrated filter element be used for filtering household drinking water, the volume of the water purifying device is greatly reduced, but also the filter element is more flexible to replace, only the filter element with the expired service life of the filter material can be replaced, and the waste of the filter material is reduced.

Description

Combined type composite filter element and water purifier with same

Technical Field

The utility model belongs to the technical field of water purification filter core equipment, especially, relate to a modular composite filter core and water purification ware that has it.

Background

At present, the existing filter elements in the market are roughly divided into two types, one type is that only a single filter element is arranged in a single filter material, when in use, a plurality of filter elements which are arranged in different filter materials are arranged in parallel, and external complex water paths are connected together, so that the occupied size is large, the assembly is complicated, and the cost is high; the utility model provides a be composite filter element, some composite filter element list filter core only pack into two to three kinds of filter media, realize that the preparation of family's pure water arbitrary needs two filter cores to arrange the use side by side, in order to further reduce the volume of filter core, also appear on the market with leading filter media, rearmounted filter media and reverse osmosis filter media all concentrate and set up a filter core, but most be undetachable global design, just so caused wherein just must wholly abandon as long as there is a filter media life due, cause the waste of filter media, intangible the use cost who has increased the user among the intangible.

Through the above analysis, the problems and defects of the prior art are as follows:

(1) the existing single filter element occupies a large volume, is complex to assemble and has high cost.

(2) The integration level of the existing composite filter element is not high enough.

(3) The structure is comparatively complicated, can not realize the different time flexibility change of the great filter media of life difference, can only whole filter core abandon simultaneously, causes the use of part filter media not abundant extravagant, intangible improvement user use cost.

Disclosure of Invention

In order to solve the problems existing in the prior art, the utility model provides a modular composite filter element and water purifier that has it not only integrates a whole filter core with the general multiple filter media of water purifier, realizes that a whole filter core just realizes preparing of pure water, reduces the filter core volume, sets up the great leading filter assembly of life difference and reverse osmosis filter assembly respectively in two filter cores that can separate from top to bottom moreover, and the renew cartridge is more nimble, and the structure is simpler.

The utility model discloses the purpose is realized like this, a modular composite filter, including first filter core and second filter core, first filter core has first mouth of a river end and connects mouth of a river end and inside mutual separation be equipped with leading filter media structure and rearmounted filter media structure, the second filter core has second mouth of a river end and inside reverse osmosis filter media structure that is equipped with, the second mouth of a river end of second filter core is pegged graft the connection mouth of a river end of first filter core and communicates with the inside water route of first filter core, forms a whole.

Further, the first filter element includes:

the first filter bottle is provided with a first open end and a first connecting end, a first inner cavity of the first filter bottle is communicated with the first inner cavity, a separating cylinder, an inner cylinder, a front filter material structure and a rear filter material structure are arranged in the first inner cavity, the front filter material structure is sleeved on the outer side of the separating cylinder, the inner cylinder and the rear filter material structure are coaxially arranged in the separating cylinder, and the rear filter material structure is positioned in the inner cylinder; a first raw water flow path, a first concentrated water flow path and a first pure water flow path are formed in the inner cavity, the front filter material structure is positioned on the first raw water flow path, and the rear filter material structure is positioned on the first pure water flow path;

the first mounting head is fixedly connected with a first open end of the first filter bottle, and is provided with a first raw water port communicated with a first raw water flow path, a first concentrated water port communicated with the first concentrated water path and a first pure water port communicated with the first pure water flow path.

Further, the second filter element includes:

the second filter bottle is provided with a second open end, a second inner cavity of the second filter bottle is communicated with the second inner cavity, a reverse osmosis filter material structure is arranged in the second inner cavity, a first upper end cover is buckled on the upper end face of the reverse osmosis filter material structure, the reverse osmosis filter material structure comprises a central pipe, and the central pipe is arranged on a central axis in the reverse osmosis filter material structure; a second raw water flow path, a second concentrated water flow path and a second pure water flow path are formed in the second inner cavity;

the second mounting head is fixedly connected with a second open end of the second filter bottle, the upper end of the first upper end cover is connected with the second mounting head in a sealing mode, the upper end of the central tube is connected with the second mounting head in a sealing mode, the second mounting head is provided with a second raw water port, a second concentrated water port and a second pure water port, the second raw water port is communicated with a second raw water flow path and a first raw water flow path respectively, the second concentrated water port is communicated with a second concentrated water flow path and a first concentrated water flow path respectively, and the second pure water port is communicated with the second pure water flow path and the first pure water flow path respectively.

Further, first raw water flow path includes first raw water inlet channel and first raw water outlet channel, first raw water inlet channel is located between leading filter media structure and the first filter flask, first raw water outlet channel is located between leading filter media structure and the separation section of thick bamboo.

The first raw water inlet flow passage is communicated with a first raw water port, and the first raw water outlet flow passage is communicated with a second raw water port;

further, the first concentrated water flow path is located between the partition cylinder and the inner cylinder.

Further, the first pure water flow path comprises a first pure water inlet flow channel and a first pure water outlet flow channel, the first pure water inlet flow channel is positioned between the inner cylinder and the rear filter material structure, the rear filter material structure is of a cylindrical structure, and the first pure water outlet flow channel is positioned in a central hole of the rear filter material structure;

the first pure water inlet runner is communicated with the second pure water port, and the first pure water outlet runner is communicated with the first pure water port.

Further, the second raw water flow path is located between the second filter flask and the reverse osmosis filter material structure, the second concentrated water flow path is located between the inside of the first upper end cover and the central pipe, and the second pure water flow path is located inside the central pipe.

Further, first installation head includes first filter flask lid, first diversion tower and second diversion tower coaxial arrangement are inside first filter flask lid and first diversion tower is located inside the second diversion tower, and the sealed connection inner tube upper portion link in first diversion tower lower part, the sealed connection separation section of thick bamboo upper end in second diversion tower lower part.

Further, the second mounting head comprises a second filter bottle cap and a third diversion tower, the third diversion tower is coaxially arranged inside the second filter bottle cap, the third diversion tower is provided with a double-layer waterway structure, the upper end and the lower part of the third diversion tower are both provided with an inner double-layer annular connecting end and an outer double-layer annular connecting end, the inner double-layer annular connecting end and the outer double-layer annular connecting end of the lower part are respectively in sealing connection with the central tube and the first upper end cover, the inner double-layer annular connecting end and the outer double-layer annular connecting end of the upper part are respectively in sealing connection with the inner tube and the separation tube, and the upper connecting end of the second filter bottle cap is in sealing connection with the first filter bottle bottom end.

Further, the preposed filter material structure comprises a second upper end cover, a second lower end cover and a preposed filter material, the preposed filter material is tightly pressed between the second upper end cover and the second lower end cover, and a seal is formed between the inner wall of the second upper end cover and the outer wall of the separation barrel;

the inner cylinder is provided with a third upper end cover, the peripheral wall of the lower end of the third upper end cover is hermetically connected with the wall of the inner cylinder, the rear filter material structure comprises a third lower end cover and a rear filter material, and the rear filter material is tightly pressed between the third upper end cover and the third lower end cover;

the separating cylinder is provided with a separating cylinder cover, and the peripheral wall of the separating cylinder cover is hermetically connected with the separating cylinder wall.

Further, the reverse osmosis filter material structure includes center tube, reverse osmosis membrane and sealing adhesive tape, reverse osmosis membrane winding is in the center tube periphery, and sealing adhesive tape winding is in the reverse osmosis membrane outside, the center tube outer wall is equipped with the pure water through-hole.

Another object of the utility model is to provide a water purifier, this purifier installs combination formula composite filter element.

By combining all the technical schemes, the invention has the advantages and positive effects that:

the utility model provides a composite filter element, it forms a whole filter core to peg graft the equipment with two filter cores through the outside, simple structure equipment is convenient, not only with the whole integrated whole filter cores to of filter media that water purification is commonly used, realize the filtration that a whole filter core just can accomplish the drinking water, purifier's volume has been reduced greatly, and it is more nimble when renew cartridge, can only change the filter core that filter media life expires, need not whole filter core all abandon, reduce the waste of filter media, reduce user use cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.

Fig. 1 is a sectional view of a combined composite filter element provided by an embodiment of the present invention.

Fig. 2 is a three-dimensional exploded view of a composite filter element according to an embodiment of the present invention.

Fig. 3 is a cross-sectional view of a first filter cartridge according to an embodiment of the present invention.

Fig. 4 is a cross-sectional view of a second filter cartridge according to an embodiment of the present invention.

Fig. 5 is a cross-sectional view of a first filter flask according to an embodiment of the present invention.

Fig. 6 is a cross-sectional view of a second filter flask according to an embodiment of the present invention.

In the figure: 100 a first filter element; 200 a second filter element; 101 a first water port end; 102 connecting the water port end; 103 a pre-filter structure; 104 a post filter material structure; 105 a second water port end; 106 reverse osmosis filter material structure; 1001 a first lumen; 1002 a first open end; 1003 a first connection end; 5001 a second lumen; 5002 a second open end; 1 a first filter flask; 2 a separation cylinder; 3, inner cylinders; 4 a first mounting head; 5 a second filter flask; 6 a first upper end cover; 7, a central tube; 8 a second mounting head; 9 a first filter bottle cap; 10 a first diversion tower; 11 a second diversion tower; 12 a second filter bottle cap; 13 a third diversion tower; 14 a second upper end cap; 15 a second lower end cap; 16 pre-filter material; 17 a third upper end cap; 18 a third lower end cap; 19 post-filter material; 20 separating cylinder cover; 21, a reverse osmosis membrane; 22 sealing the tape; 71 a pure water through hole; an L1 first raw water flow path; l2 first concentrate flow path; an L3 first pure water flow path; an L4 second raw water flow path; l5 second concentrate flow path; an L6 second pure water flow path; an L11 first raw water inlet channel; an L12 first raw water outlet flow passage; l31 first pure water inlet channel; an L32 first pure water outlet flow channel; a K1 first raw water port; a K2 first concentrate nozzle; a K3 first pure water port; k4 second raw water gap; k5 second concentrate nozzle; k6 second pure water port.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "upper", "lower", "leading", "trailing", and the like, indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 6, the combined composite filter element provided by the embodiment includes a first filter element 100 and a second filter element 200, the first filter element 100 has a first water gap end 101 and a front filter element structure 103 and a rear filter element structure 104 which are connected to the water gap end 102 and are separated from each other inside, the second filter element 200 has a second water gap end 105 and is internally provided with a reverse osmosis filter element structure 106, the second water gap end 105 of the second filter element 200 is inserted into the connection water gap end 102 of the first filter element 100 and is communicated with the internal water path of the first filter element 100, so as to form a whole, which not only realizes that one whole filter element completes the preparation of purified water, the size is greatly reduced, but also can flexibly replace the filter element to be replaced according to the use requirement, and the waste of the filter element is reduced.

In an alternative embodiment of the present invention, the first filter element 100 includes:

the first filter bottle 1 is provided with a first open end 1002 and a first connecting end 1003, the first inner cavity 1001 is communicated with the first inner cavity 1001, a separating cylinder 2, an inner cylinder 3, a front filter material structure 103 and a rear filter material structure 104 are arranged in the first inner cavity 1001, the front filter material structure 103 is sleeved on the outer side of the separating cylinder 2, the inner cylinder 3 and the rear filter material structure 104 are coaxially arranged in the separating cylinder 2, and the rear filter material structure 104 is positioned in the inner cylinder 3; a first raw water flow path L1, a first concentrated water flow path L2, and a first pure water flow path L3 are formed in the first inner chamber 1001, the pre-filter structure 103 is positioned on the first raw water flow path L1, and the post-filter structure is positioned on the first pure water flow path L3;

the first mounting head 4 is fixedly connected to the first open end 1002 of the first filter flask 1, and the first mounting head 4 is provided with a first raw water port K1 communicated with the first raw water flow path L1, a first concentrated water port K2 communicated with the first concentrated water path L2, and a first purified water port K3 communicated with the first purified water flow path L3.

In an alternative embodiment of the present invention, the second filter element 200 includes:

the second filter bottle 5 is provided with a second open end 5002, the inner cavity of the second inner cavity 5001 is communicated with the inner wall, the reverse osmosis filter structure 106 is arranged in the second inner cavity 5001, the upper end face of the reverse osmosis filter structure 106 is buckled with the first upper end cover 6, the reverse osmosis filter structure 106 comprises a central pipe, and the central pipe is arranged on a central axis in the reverse osmosis filter structure 106; a second raw water flow path L4, a second concentrated water flow path L5, and a second pure water flow path L6 are formed in the second cavity 5001;

the second mounting head 8 is fixedly connected to the second open end 5002 of the second filter flask 5, the upper end of the first upper end cover 6 is hermetically connected with the second mounting head 8, the upper end of the central tube 7 is hermetically connected with the second mounting head 8, the second mounting head 8 is provided with a second raw water port K4, a second concentrated water port K5 and a second pure water port K6, the second raw water port K4 is respectively communicated with the second raw water flow path L4 and the first raw water flow path L1, the second concentrated water port K5 is respectively communicated with the second concentrated water flow path L5 and the first concentrated water flow path L2, and the second pure water port K6 is respectively communicated with the second pure water flow path L6 and the first pure water flow path L3.

In an optional technical solution of this embodiment, the first raw water flow path L1 includes a first raw water inlet flow path L11 and a first raw water outlet flow path L12, the first raw water inlet flow path L11 is located between the pre-filter structure 103 and the first filter bottle 1, and the first raw water outlet flow path L12 is located between the pre-filter structure 103 and the separation cylinder 2;

the first raw water inlet channel L11 is communicated with a first raw water port K1, and the first raw water outlet channel L12 is communicated with a second raw water port K4;

in an alternative embodiment of the present invention, the first concentrated water flow path L5 is located between the partition cylinder 2 and the inner cylinder 3.

In the optional technical solution of this embodiment, the first pure water flow path L3 includes a first pure water inlet flow path L31 and a first pure water outlet flow path L32, the first pure water inlet flow path L31 is located between the inner cylinder 3 and the rear filter material structure 104, the rear filter material structure 104 is a cylindrical structure, and the first pure water outlet flow path L31 is located in a central hole of the rear filter material structure, so that the position of the rear filter material structure 104 is set, which not only saves space and improves space utilization, but also has a simple structure and is convenient to assemble;

the first pure water inlet flow passage L31 is communicated with the second pure water port K6, and the first pure water outlet flow passage L32 is communicated with the first pure water port K3.

In an alternative embodiment of this embodiment, the second raw water flow path L4 is located between the second filter flask 5 and the reverse osmosis filter structure 106, the second concentrated water flow path L5 is located between the inside of the first upper end cap 6 and the central tube 7, and the second pure water flow path L6 is located inside the central tube 7.

In the optional technical solution of this embodiment, the first mounting head 4 includes a first filter bottle cap 9, a first diversion tower 10 and a second diversion tower 11, the first diversion tower 10 and the second diversion tower 11 are coaxially mounted inside the first filter bottle cap 9, the first diversion tower 10 is located inside the second diversion tower 11, the lower portion of the first diversion tower 10 is hermetically connected with the upper connecting end of the inner cylinder 3, and the lower portion of the second diversion tower 11 is hermetically connected with the upper end of the separation cylinder 2.

In the optional technical scheme of this embodiment, second installation head 8 includes second filter bottle lid 12 and third guiding column 13, the coaxial setting of third guiding column 13 is at the inside 12 of second filter bottle lid, third guiding column 13 is provided with double-deck waterway structure, the upper end and the lower part of third guiding column 13 all are equipped with inside and outside double-deck annular link, inside and outside double-deck annular link of lower part is sealing connection center tube 7 and first upper end cover 6 respectively, inside and outside double-deck annular link of upper portion is sealing connection inner tube 3 and separation tube 2 respectively, the first filter bottle 1 bottom of second filter bottle lid 12 upper portion link sealing connection, so, the intercommunication in inside water route of second filter core 200 and the inside water route of first filter core 100 has just been realized, and simple structure is compact, easy to assemble.

In the optional technical solution of this embodiment, the pre-filter structure 103 includes a second upper end cap 14, a second lower end cap 15 and a pre-filter 16, the pre-filter 16 is compressed between the second upper end cap 14 and the second lower end cap 15, and a seal is formed between the inner wall of the second upper end cap 14 and the outer wall of the separation barrel 2;

the inner cylinder 3 is provided with a third upper end cover 17, the peripheral wall of the lower end of the third upper end cover 17 is in sealing connection with the wall of the inner cylinder 3, the rear filter material structure 104 comprises a third lower end cover 18 and a rear filter material 19, the rear filter material 19 is compressed between the third upper end cover 17 and the third lower end cover 18, and the design of the third upper end cover 17 not only seals the inner cylinder, but also compresses the rear filter material 19 at the same time, so that the sharing of parts is realized, one part is saved, the size of the filter element is further reduced, and the cost is reduced.

The separation cylinder 2 is provided with a separation cylinder cover 20, and the peripheral wall of the separation cylinder cover 20 is connected with the wall of the separation cylinder 2 in a sealing way.

In the optional technical scheme of this embodiment, reverse osmosis filter media structure still includes reverse osmosis membrane 21 and sealed sticky tape 22, and reverse osmosis membrane 21 twines in center tube 7 periphery, and sealed sticky tape 33 twines in reverse osmosis membrane 21 outside, and center tube 7 outer wall is equipped with pure water through-hole 71, makes the pure water that filters the acquisition can get into inside center tube 7.

The concrete filtering principle of the combined composite filter element is as follows: raw water with certain pressure flows into a first raw water inlet channel L11 from a first raw water port K1, enters a first raw water outlet channel L12 after being filtered by a preposed filter material 16, then enters a second raw water channel L4 through a second raw water port K4, is filtered by a reverse osmosis membrane 21, and enters a second pure water channel L6 in a central tube 7, then flows into a first pure water inlet channel L31 through a second pure water port K6, is filtered by a postposition filter material 19, enters a first pure water outlet channel L32, and finally flows out from a first pure water port K3; the remaining concentrated water after filtration enters the second concentrated water flow path L5, flows into the first concentrated water flow path L2 through the second concentrated water port K5, and is finally discharged from the first concentrated water port K2.

The utility model also provides a purifier with above-mentioned combination formula combined filter core, this purifier has reduced the volume of purifier greatly owing to adopt above-mentioned combined filter core, and convenience of customers uses.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made by those skilled in the art within the technical scope of the present invention should be covered within the scope of the present invention.

Claims

1. The utility model provides a modular composite filter, its characterized in that, includes first filter core and second filter core, first filter core has first mouth of a river end and connects mouth of a river end and inside mutual separation be equipped with leading filter media structure and rearmounted filter media structure, the second filter core has second mouth of a river end and inside reverse osmosis filter media structure that is equipped with, the second mouth of a river end of second filter core is pegged graft the connection mouth of a river end of first filter core and with the inside water route intercommunication of first filter core, form a whole.

2. The modular composite filter cartridge of claim 1, wherein said first filter cartridge comprises:

the first filter bottle is provided with a first open end and a first connecting end, a first inner cavity of the first filter bottle is communicated with the first inner cavity, a separating cylinder, an inner cylinder, a front filter material structure and a rear filter material structure are arranged in the first inner cavity, the front filter material structure is sleeved on the outer side of the separating cylinder, the inner cylinder and the rear filter material structure are coaxially arranged in the separating cylinder, and the rear filter material structure is positioned in the inner cylinder; a first raw water flow path, a first concentrated water flow path and a first pure water flow path are formed in the first inner cavity, the front filter material structure is positioned on the first raw water flow path, and the rear filter material structure is positioned on the first pure water flow path;

3. The modular composite filter cartridge of claim 2, wherein said second filter cartridge comprises:

4. The composite filter element of claim 3, wherein the first raw water flow path comprises a first raw water inlet flow path and a first raw water outlet flow path, the first raw water inlet flow path is located between the pre-filter structure and the first filter flask, and the first raw water outlet flow path is located between the pre-filter structure and the separation cylinder;

the first raw water inlet flow passage is communicated with a first raw water port, and the first raw water outlet flow passage is communicated with a second raw water port.

5. The modular composite filter cartridge of claim 3 wherein said first concentrate flow path is between the separation cartridge and the inner cartridge.

6. The composite filter element of claim 3, wherein said first pure water flow path comprises a first pure water inlet flow path and a first pure water outlet flow path, said first pure water inlet flow path is located between said inner cylinder and said post-filter structure, said post-filter structure is a cylindrical structure, and said first pure water outlet flow path is located in a central hole of said post-filter structure;

7. The composite filter element of claim 3 wherein said second raw water flow path is between said second filter flask and said reverse osmosis filter element structure, said second concentrate flow path is within and between said first upper end cap, and said second pure water flow path is within said central tube.

8. The combined composite filter element according to claim 2, wherein the first mounting head comprises a first filter bottle cap, a first diversion tower and a second diversion tower, the first diversion tower and the second diversion tower are coaxially mounted inside the first filter bottle cap, the first diversion tower is positioned inside the second diversion tower, the lower part of the first diversion tower is hermetically connected with the upper connecting end of the inner barrel, and the lower part of the second diversion tower is hermetically connected with the upper end of the separation barrel.

9. The combined composite filter element according to claim 3, wherein the second mounting head comprises a second filter bottle cap and a third diversion tower, the third diversion tower is coaxially arranged inside the second filter bottle cap, the third diversion tower is provided with a double-layer waterway structure, the upper end and the lower part of the third diversion tower are respectively provided with an inner-layer annular connecting end and an outer-layer annular connecting end, the inner-layer annular connecting end and the outer-layer annular connecting end of the lower part are respectively connected with the central pipe and the first upper end cover in a sealing mode, the inner-layer annular connecting end and the outer-layer annular connecting end of the upper part are respectively connected with the inner cylinder and the separation cylinder in a sealing mode, and the upper connecting end of the second filter bottle cap is connected with the bottom end of the first filter bottle in a sealing mode.

10. The composite filter element according to any one of claims 2 to 9, wherein the pre-filter structure comprises a second upper end cap, a second lower end cap and a pre-filter, the pre-filter is compressed between the second upper end cap and the second lower end cap, and a seal is formed between the inner wall of the second upper end cap and the outer wall of the separation cylinder;

11. The combined composite filter element according to any one of claims 3 to 9, wherein the reverse osmosis filter material structure comprises a central tube, a reverse osmosis membrane and a sealing tape, the reverse osmosis membrane is wound on the periphery of the central tube, the sealing tape is wound on the outermost side of the reverse osmosis membrane, and the outer wall of the central tube is provided with pure water through holes.

12. A water purifier, characterized in that the water purifier is provided with a combined composite filter element according to any one of claims 1 to 11.