CN214319751U - Reverse osmosis filter core device - Google Patents

Abstract

The application provides a reverse osmosis filter element device, which comprises a reverse osmosis filter element assembly and a filter flask, wherein the filter flask is sleeved outside the filter element assembly, and a pure water cavity is arranged between the inner surface of the filter flask and the outer surface of the reverse osmosis filter element assembly; the reverse osmosis filter element assembly comprises a flexible plate and a plurality of reverse osmosis membrane bags, the flexible plate is provided with a plurality of water outlet holes, and the water outlet holes are matched with the open ends of the reverse osmosis membrane bags, so that pure water in each reverse osmosis membrane bag can only flow out through the water outlet holes; the flexible plate is bent to form a cylindrical structure towards one side of the reverse osmosis membrane bag, so that the reverse osmosis membrane bags are located on the inner side of the cylindrical structure, and the water outlet holes are exposed on the outer surface of the cylindrical structure. The application of the utility model discloses reverse application filter core device is through enlarging the volume of the pure water of staying in reverse osmosis filter core device when shutting down, has reduced the TDS value of the pure water that reverse osmosis filter core device made a few minutes before when restarting.

Description

Reverse osmosis filter core device

Technical Field

This application belongs to the water purification field, specifically provides a reverse osmosis filter core device.

Background

The water purifier is a water treatment device which carries out deep filtration and purification treatment according to the use requirement of water. In recent years, with the improvement of life quality of people, people pay more and more attention to their health, and water purifiers capable of improving water quality are concerned by consumers. The water purifier mainly realizes the filtration of water by a filter element, wherein the most important filter element is a reverse osmosis filter element. The reverse osmosis filter element adopts a reverse osmosis membrane to purify water by utilizing the principle of a reverse osmosis technology, and the membrane aperture of the reverse osmosis membrane is very small, so that dissolved salts, colloids, microorganisms, organic matters and the like in the water can be effectively removed, and the water for users to drink is obtained.

The structure of present reverse osmosis filter core is reverse osmosis membrane winding on a center tube, treats that filterable water gets into from the one end of reverse osmosis filter core under the effect of pressure, and the water after the filtration passes through the center tube and flows, and dense water flows from the other end of reverse osmosis filter core. When the pressurization is stopped, raw water and pure water are retained on both sides of the reverse osmosis membrane, and part of ions in the raw water slowly permeate to the pure water side under the condition of no pressure.

Because the volume of the pure water cavity of the present reverse osmosis filter element is the volume of the central tube, and the whole reverse osmosis filter element is wrapped by the original water cavity, the volume of the original water cavity is far larger than the volume of the pure water cavity, namely, after the water purifier is shut down, the volume of the pure water retained in the reverse osmosis filter element device is smaller. Therefore, when ion permeation occurs, the TDS (Total dissolved solids) value of the pure water in the pure water cavity of the reverse osmosis filter element can be obviously increased, and when the reverse osmosis filter element is pressurized again, the TDS value of the pure water flowing out of the reverse osmosis filter element in the first few minutes can be higher, so that water needs to be discharged for a period of time, and user experience is poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, namely to solve the problem that the TDS value of the produced water is high in the last few minutes when the reverse osmosis filter element is re-pressurized, the application provides a reverse osmosis filter element device, which comprises a reverse osmosis filter element component and a filter bottle, wherein the filter bottle is sleeved outside the reverse osmosis filter element component, and a pure water cavity is arranged between the inner surface of the filter bottle and the outer surface of the reverse osmosis filter element component; the reverse osmosis filter element assembly comprises a flexible plate and a plurality of reverse osmosis membrane bags, the flexible plate is provided with a plurality of water outlet holes, and the water outlet holes are matched with the open ends of the reverse osmosis membrane bags so that pure water in each reverse osmosis membrane bag can only flow out through the water outlet holes; the flexible plate is bent to a cylindrical structure towards one side of the reverse osmosis membrane bag, so that the reverse osmosis membrane bags are positioned at the inner side of the cylindrical structure, and the water outlet holes are exposed on the outer surface of the cylindrical structure, so that the pure water enters the pure water cavity through the water outlet holes.

Optionally, one of the water outlet holes on the flexible plate corresponds to the open end of one of the reverse osmosis membrane bags; or one water outlet hole on the flexible plate corresponds to the open ends of the plurality of reverse osmosis membrane bags; or, a plurality of the water outlet holes on the flexible plate correspond to the opening end of the reverse osmosis membrane bag.

Optionally, the edge of the open end of each reverse osmosis membrane bag is in sealing fit with the flexible plate.

Optionally, the reverse osmosis filter core assembly further comprises a central pipe for guiding raw water from the top side of the plurality of reverse osmosis membrane bags to the bottom side of the plurality of reverse osmosis membrane bags; the plurality of reverse osmosis membrane bags are configured in a way that an accommodating cavity capable of accommodating the central pipe is formed at the central shaft, and the central pipe is embedded into the accommodating cavity and wound by the plurality of reverse osmosis membrane bags.

Optionally, the reverse osmosis filter element assembly further comprises a top end cover, the top end cover is provided with a raw water separation rib, the top end cover is covered on the top side of the tubular structure, and the top end cover is in sealing fit with the outer peripheral surface of the tubular structure so as to separate the pure water cavity from the top end surface of the tubular structure; the inner cavity surrounded by the raw water separation convex ribs is communicated with the top end of the central tube.

Optionally, the reverse osmosis filter element assembly further comprises a bottom end cover, the bottom end cover is arranged at the bottom side of the cylindrical structure, and the bottom end cover is in sealing fit with the outer peripheral surface of the cylindrical structure so as to block the pure water cavity from the bottom end surface of the cylindrical structure; and a cavity is formed between the bottom end cover and the bottom end face of the cylindrical structure, and the cavity is communicated with the bottom end of the central tube.

Optionally, the ends of the plurality of reverse osmosis membrane bags far away from the flexible plate are hermetically connected with each other, so that water entering from one end face of the cylindrical structure can only flow to the other end face through gaps among the plurality of reverse osmosis membrane bags.

Optionally, the reverse osmosis filter element assembly further comprises a raw water-containing water cover and a concentrated water-containing water cover, the raw water-containing water cover is arranged at the top end of the cylindrical structure, the raw water-containing water cover is in sealing fit with the outer peripheral surface of the cylindrical structure so as to separate the pure water cavity from the top end surface of the cylindrical structure, and one end of the raw water-containing water cover, which is far away from the cylindrical structure, is communicated with the outside so as to enable raw water to enter the reverse osmosis filter element device; the concentrated water cover is arranged at the bottom end of the cylindrical structure, the concentrated water cover is in sealing fit with the outer peripheral surface of the cylindrical structure so as to separate the pure water cavity from the bottom end surface of the cylindrical structure, and one end, far away from the cylindrical structure, of the concentrated water cover is communicated with the outside so that concentrated water flows out of the reverse osmosis filter element device.

Optionally, the reverse osmosis filter element assembly further comprises a vibration device, the vibration device is arranged on the inner side of the cylindrical structure, and the vibration device is used for cleaning scale attached to the reverse osmosis membrane bag in a vibration mode.

Optionally, the vibration device is an ultrasonic vibration device, and/or the vibration device is configured such that the transmission direction of the emitted wave is parallel to the axial direction or the radial direction of the cylindrical structure.

As can be appreciated by those skilled in the art, the reverse osmosis filter cartridge device described above in the present application has at least the following advantages:

1. through set up the pure water cavity between filter flask and reverse osmosis filter element group spare (this pure water cavity is great for the pure water cavity volume that lies in reverse osmosis filter element group spare inboard among the prior art), and utilize the tubular structure that flexoplate and reverse osmosis membrane bag formed to filter, make the pure water that the reverse osmosis membrane bag filtered can get into the great pure water cavity of volume from the apopore of tubular structure's outer peripheral face, thereby the pure water can be detained in the pure water cavity when making the shut down, thereby the volume of the pure water of detaining in the reverse osmosis filter element device when having increased the shut down, because the volume of pure water has increased, so the infiltration of ion can not make the TDS value of pure water obviously increase, and then reduced the TDS value of the pure water of reverse osmosis filter element device first few minutes outflow when restarting.

2. Through setting up the center tube for the raw water that gets into from reverse osmosis filter core device's top side can be guided to tubular structure's bottom terminal surface by the center tube, thereby makes dense water can flow from tubular structure's top terminal surface, that is to say, raw water inlet and dense water play water can be located reverse osmosis filter core device with one side, and then can set up raw water import and dense water export with one side at reverse osmosis filter core device, is favorable to simplifying reverse osmosis filter core device's structure.

3. Through set up vibrating device in tubular structure inboard, can utilize the vibration that vibrating device sent to clear up the adnexed incrustation scale on the surface of reverse osmosis membrane bag to reduce the accumulation of incrustation scale on the surface of reverse osmosis membrane bag, be favorable to improving the life of reverse osmosis membrane bag.

Drawings

Some embodiments of the present application are described below with reference to the accompanying drawings, in which:

FIG. 1 is a cross-sectional view of a reverse osmosis cartridge assembly according to a first embodiment of the present application;

FIG. 2 is an isometric view of a first embodiment of the present application with the flexible sheet in an unflexed state;

FIG. 3 is an isometric view of a first embodiment of the present application with the flexible sheet bent into a tubular configuration;

FIG. 4 is a schematic illustration of an embodiment of a water outlet hole according to a first embodiment of the present application;

FIG. 5 is a schematic illustration of another embodiment of a water outlet hole according to the first embodiment of the present application;

fig. 6 is a cross-sectional view of a reverse osmosis cartridge assembly according to a second embodiment of the present application.

List of reference numerals:

100. a filter flask; 110. a bottle cap; 120. a bottle body;

200. a reverse osmosis filter element assembly; 210. a tubular structure; 211. a flexible board; 2111. a water outlet hole; 212. A reverse osmosis membrane bag; 213. an accommodating chamber; 220. a central tube; 221. a water diversion hole; 230. a top end cap; 231. the bottom is provided with an annular convex rib; 232. raw water separation convex ribs; 233. a dense water separation convex rib; 234. a central bore; 235. a concentrated water through hole; 240. a bottom end cap; 241. a groove;

310. a pure water chamber; 320. a cavity; 330. a concentrated water channel; 331. a first concentrated water passage; 332. a second concentrated water passage;

410. covering the original water with a water separating cover; 420. and (5) a concentrated water separating cover.

Detailed Description

It should be understood by those skilled in the art that the embodiments described below are only a part of the embodiments of the present application, and not all embodiments of the present application, and the part of the embodiments are intended to explain the technical principles of the present application and not to limit the scope of the present application. All other embodiments that can be obtained by a person skilled in the art based on the embodiments provided in the present application without inventive effort shall still fall within the scope of protection of the present application.

It should be noted that in the description of the present application, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.

In the art, unfiltered water is referred to as raw water, and water filtered by a reverse osmosis filter element is referred to as pure water. Meanwhile, it needs to be explained that the reverse osmosis filter element of the application can be directly used for purifying raw water, and can also be connected with a front filter element in series for purifying the raw water which is filtered once by the front filter element.

The first embodiment of the present application:

as shown in fig. 1, the reverse osmosis cartridge assembly of the present embodiment includes a cartridge 100 and a reverse osmosis cartridge assembly 200. The reverse osmosis cartridge assembly 200 comprises a cylindrical structure 210, a center tube 220, a top end cap 230 and a bottom end cap 240. The center tube 220 is disposed inside the cylindrical structure 210, the top end cap 230 is disposed on the top of the cylindrical structure 210, and the bottom end cap 240 is disposed on the bottom of the cylindrical structure 210.

As shown in fig. 2 and 3, in particular, the cylindrical structure 210 includes a flexible plate 211 and a plurality of reverse osmosis membrane bags 212. The flexible plate 211 is provided with a plurality of water outlet holes 2111, the open end of each reverse osmosis membrane bag 212 corresponds to one water outlet hole 2111, namely the opening of the reverse osmosis membrane bag 212 surrounds the water outlet hole 2111, and the edge of the open end of the reverse osmosis membrane bag 212 is in sealing fit with the flexible plate 211, so that pure water in the reverse osmosis membrane bag 212 can only flow out through the water outlet holes 2111. The flexible plate 211 is bent in a cylindrical shape toward the reverse osmosis membrane bag 212 side, thereby forming a cylindrical structure 210.

It should be noted that one reverse osmosis membrane bag 212 may correspond to one water outlet 2111, one reverse osmosis membrane bag 212 may correspond to a plurality of water outlets 2111 (as shown in fig. 4), or a plurality of reverse osmosis membrane bags 212 may be hermetically connected, so that a plurality of reverse osmosis membrane bags 212 correspond to one water outlet 2111 (as shown in fig. 5).

As shown in fig. 3, a receiving chamber 213 capable of receiving the center tube 220 is formed at a central axis of the cylindrical structure 210. The central tube 220 is inserted into the receiving chamber 213 (shown in fig. 1) and is wound by a plurality of reverse osmosis membrane bags 212. The end of the plurality of reverse osmosis membrane bags 212 opposite to the open end thereof is hermetically connected to the central pipe 220, so that raw water entering from the bottom end surface of the cylindrical structure 210 can only flow to the top end surface of the cylindrical structure 210 through the gaps between the plurality of reverse osmosis membrane bags 212.

As can be understood by those skilled in the art, by providing the central tube 220, the raw water entering from the top side of the reverse osmosis filter element device can be guided to the bottom end surface of the tubular structure 210 by the central tube 220, so that the concentrated water can flow out from the top end surface of the tubular structure 210, that is, the raw water inlet and the concentrated water outlet can be located on the same side of the reverse osmosis filter element device, and the raw water inlet and the concentrated water outlet can be disposed on the same side of the reverse osmosis filter element device, which is beneficial to simplifying the structure of the reverse osmosis filter element device.

As shown in fig. 1, the top cap 230 is provided with a bottom annular rib 231, a raw water separation rib 232, a concentrated water separation rib 233, a central hole 234, and a concentrated water through hole 235. A top end cap 230 covers the top side of the center tube 220 and the cylindrical structure 210. The top cover 230 and the outer circumferential surface of the cylindrical structure 210 are sealed to block the pure water chamber 310 from the top end surface of the cylindrical structure 210, thereby preventing the concentrated water flowing out from the top end surface of the cylindrical structure 210 from entering the pure water chamber 310. The inner side wall of the bottom annular bead 231 and the outer side wall of the central tube 220 are sealed to form a first concentrate passage 331 between the top end cap 230 and the top end face of the cylindrical structure 210. Raw water can enter the reverse osmosis filter element device from an inner cavity surrounded by the raw water separation convex rib 232 and then enter the central tube 220 through the central hole 234. The concentrated water separating rib 233 surrounds the raw water separating rib 232, so that a second concentrated water passage 332 is formed between the inner surface of the concentrated water separating rib 233 and the outer surface of the raw water separating rib 232. The concentrated water through hole 235 is communicated with the first concentrated water channel 331 and the second concentrated water channel 332, so that the first concentrated water channel 331 and the second concentrated water channel 332 form a concentrated water channel 330, and after the concentrated water flows out from the top end face of the cylindrical structure 210, the concentrated water can flow out of the reverse osmosis filter element device through the concentrated water channel 330.

As shown in fig. 1, the bottom end cap 240 is provided with a groove 241, and the center tube 220 is fitted into the groove 241. The bottom end cap 240 and the outer circumferential surface of the cylindrical structure 210 are sealed to block the pure water chamber 310 from the bottom end surface of the cylindrical structure 210. A cavity 320 is formed between the bottom end cover 240 and the bottom end face of the cylindrical structure 210, the central tube 220 is provided with a water diversion hole 221, and raw water in the central tube 220 can enter the cavity 320 from the water diversion hole 221 and then enter the cylindrical structure 210 from the bottom end face of the cylindrical structure 210.

As shown in fig. 1, the filter bottle 100 includes a bottle cap 110 and a bottle body 120. When assembling, the reverse osmosis filter element assembly 200 is put into the bottle body 120, and then the bottle cap 110 is covered. A pure water chamber 310 is formed between the inner surface of the filter bottle 100 and the outer surface of the reverse osmosis filter element assembly 200, and pure water in the reverse osmosis membrane bag 212 flows into the pure water chamber 310 from the water outlet 2111 and then flows out of the reverse osmosis filter element assembly.

It should be noted that the filter bottle 100 may be integrally formed, as long as the size of the bottle opening is set to be larger than the maximum circumference of the reverse osmosis filter element assembly 200.

When the reverse osmosis filter element device of the embodiment is used, raw water sequentially passes through the inner cavity surrounded by the raw water separation ribs 232 and the central hole 234 to enter the central tube 220, then enters the cavity 320 through the water guide hole 221, and then enters the tubular structure 210. A part of the raw water is filtered into pure water and enters the reverse osmosis membrane bag 212, and a part of the raw water is changed into concentrated water after scouring the surface of the reverse osmosis membrane bag 212. The concentrate flows out of the top end face of the cylindrical structure 210 and then flows out of the reverse osmosis filter element device through the concentrate passage 330. Pure water enters the pure water chamber 310 from the water outlet hole 2111 and flows out of the reverse osmosis filter element device under the guidance of the pure water chamber 310.

It can be understood by those skilled in the art that the reverse osmosis filter cartridge device of the present embodiment is configured such that the pure water chamber 310 is disposed between the filter bottle 100 and the reverse osmosis filter cartridge assembly 200, and the cylindrical structure 210 formed by the flexible plate 211 and the reverse osmosis membrane bag 212 is used for filtering, so that pure water can enter the pure water chamber 310 from the outer circumferential surface of the cylindrical structure 210, and thus pure water can be retained in the pure water chamber 310 during shutdown, thereby increasing the volume of pure water retained in the reverse osmosis filter cartridge device during shutdown, and because the volume of pure water is increased, the permeation of ions does not increase the TDS value of pure water significantly, thereby reducing the TDS value of pure water flowing out of the reverse osmosis filter cartridge device in the first few minutes during restart.

Second embodiment of the present application:

as shown in fig. 6, the reverse osmosis cartridge assembly 200 of the present embodiment is modified, unlike the first embodiment. The reverse osmosis cartridge assembly 200 of the present embodiment includes a cylindrical structure 210, a raw water distribution cap 410, and a concentrated water distribution cap 420. The raw water-separated cover 410 covers the cylindrical structure 210 to block the pure water chamber 310 from the top end surface of the cylindrical structure 210, and one end of the raw water-separated cover 410 away from the cylindrical structure 210 communicates with the outside to guide the raw water to the top end surface of the cylindrical structure 210. The concentrated water cover 420 is disposed at the bottom of the cylindrical structure 210 to block the pure water chamber 310 from the bottom end surface of the cylindrical structure 210, and one end of the concentrated water cover 420, which is far away from the cylindrical structure 210, is communicated with the outside to guide the concentrated water out of the reverse osmosis filter element device.

Although not shown in the drawings, unlike the first embodiment, the cylindrical structure 210 of the present embodiment is not provided with the accommodating chamber 213, and after the flexible plate 211 of the present embodiment is bent, the ends of the plurality of reverse osmosis membrane bags 212 remote from the flexible plate 211 are hermetically connected to each other, thereby forming the cylindrical structure 210. By hermetically connecting the ends of the plurality of reverse osmosis membrane bags 212 far from the flexible plate 211 with each other, raw water entering from the top end face of the cylindrical structure 210 can only flow out from the bottom end face of the cylindrical structure 210 through gaps between the plurality of reverse osmosis membrane bags 212.

Third embodiment of the present application:

although not shown in the drawings, unlike the first and second embodiments, the reverse osmosis filter cartridge device of the present embodiment further includes a vibration device disposed in the gaps between the plurality of reverse osmosis membrane bags 212, and when the reverse osmosis filter cartridge device is operated, the vibration device vibrates, and the vibration is transmitted to the surface of the reverse osmosis membrane bags 212, so as to clean the scale attached to the surface of the reverse osmosis membrane bags 212, and then the water flows out from one end surface of the cylindrical structure 210 with the scale and finally flows out of the reverse osmosis filter cartridge device.

The vibration device may be an ultrasonic vibration device, and the transmission direction of the waves emitted by the vibration device is parallel to the axial direction or the radial direction of the cylindrical structure 210.

As can be understood by those skilled in the art, by providing the vibration device, the scale adhered to the surface of the reverse osmosis membrane bag 212 can be cleaned by the vibration of the vibration device, so as to reduce the accumulation of the scale on the surface of the reverse osmosis membrane bag 212, which is beneficial to improving the service life of the reverse osmosis membrane bag 212.

So far, the technical solutions of the present application have been described in connection with the foregoing embodiments, but it is easily understood by those skilled in the art that the scope of protection of the present application is not limited to these specific embodiments. The technical solutions in the above embodiments can be split and combined, and equivalent changes or substitutions can be made on related technical features by those skilled in the art without departing from the technical principles of the present application, and any changes, equivalents, improvements, and the like made within the technical concept and/or technical principles of the present application will fall within the protection scope of the present application.

Claims (10)

1. A reverse osmosis filter element device is characterized by comprising a reverse osmosis filter element assembly and a filter flask, wherein the filter flask is sleeved outside the reverse osmosis filter element assembly, and a pure water cavity is arranged between the inner surface of the filter flask and the outer surface of the reverse osmosis filter element assembly;

the reverse osmosis filter element assembly comprises a flexible plate and a plurality of reverse osmosis membrane bags, the flexible plate is provided with a plurality of water outlet holes, and the water outlet holes are matched with the open ends of the reverse osmosis membrane bags, so that pure water in each reverse osmosis membrane bag can only flow out through the water outlet holes;

the flexible plate is bent to form a cylindrical structure towards one side of the reverse osmosis membrane bag, so that the reverse osmosis membrane bags are positioned on the inner side of the cylindrical structure, and the water outlet holes are exposed on the outer surface of the cylindrical structure, so that the pure water enters the pure water cavity through the water outlet holes.

2. The reverse osmosis filter cartridge assembly of claim 1, wherein one of the outlet openings in the flexible sheet corresponds to the open end of one of the reverse osmosis membrane bags; alternatively, the first and second electrodes may be,

one water outlet hole on the flexible plate corresponds to the open ends of the reverse osmosis membrane bags; alternatively, the first and second electrodes may be,

the plurality of water outlet holes on the flexible plate correspond to the opening end of the reverse osmosis membrane bag.

3. The reverse osmosis filter cartridge device of claim 2, wherein an edge of the open end of each reverse osmosis membrane bag is in sealing engagement with the flexible sheet.

4. The reverse osmosis filter cartridge device of claim 1, wherein the reverse osmosis cartridge assembly further comprises a central tube for directing raw water from a top side of the plurality of reverse osmosis membrane bags to a bottom side of the plurality of reverse osmosis membrane bags;

the plurality of reverse osmosis membrane bags are configured in a way that a containing cavity capable of containing the central pipe is formed at the central shaft,

the central tube is embedded in the accommodating cavity and is wound by the plurality of reverse osmosis membrane bags.

5. The reverse osmosis filter cartridge assembly of claim 4, further comprising a top end cap having a raw water separation bead disposed thereon,

the top end cover is covered on the top side of the cylindrical structure and is in sealing fit with the peripheral surface of the cylindrical structure so as to block the pure water cavity from the top end surface of the cylindrical structure;

the inner cavity surrounded by the raw water separation convex ribs is communicated with the top end of the central tube.

6. The reverse osmosis filter cartridge device of claim 5, wherein the reverse osmosis cartridge assembly further comprises a bottom end cap,

the bottom end cover is arranged at the bottom side of the cylindrical structure and is in sealing fit with the peripheral surface of the cylindrical structure so as to block the pure water cavity from the bottom end surface of the cylindrical structure;

and a cavity is formed between the bottom end cover and the bottom end face of the cylindrical structure, and is communicated with the bottom end of the central tube.

7. The reverse osmosis filter cartridge assembly of claim 1, wherein the ends of the plurality of reverse osmosis membrane cartridges remote from the flexible sheet are sealingly connected to each other such that water entering from one end face of the tubular structure can only flow through gaps between the plurality of reverse osmosis membrane cartridges to the other end face.

8. A reverse osmosis filter element assembly according to claim 7, wherein the reverse osmosis filter element assembly further comprises a raw water cap and a concentrated water cap,

the raw water-containing water cover is arranged at the top end of the cylindrical structure, the raw water-containing water cover is in sealing fit with the peripheral surface of the cylindrical structure so as to separate the pure water cavity from the top end surface of the cylindrical structure, and one end of the raw water-containing water cover, which is far away from the cylindrical structure, is communicated with the outside so that raw water enters the reverse osmosis filter element device;

the concentrated water cover is arranged at the bottom end of the cylindrical structure, and is in sealing fit with the outer peripheral face of the cylindrical structure, so that the pure water cavity is separated from the bottom end face of the cylindrical structure, and one end of the cylindrical structure, far away from the concentrated water cover, is communicated with the outside, so that concentrated water flows out of the reverse osmosis filter element device.

9. The reverse osmosis filter cartridge assembly of any one of claims 1 to 8, further comprising a vibration device disposed inside the cylindrical structure, the vibration device being configured to vibrate the reverse osmosis membrane bag to remove scale adhered to the reverse osmosis membrane bag.

10. A reverse osmosis cartridge device according to claim 9, wherein the vibration means is an ultrasonic vibration means, and/or,

the vibration device is configured such that the transmission direction of the wave emitted by the vibration device is parallel to the axial direction or the radial direction of the cylindrical structure.

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