CN220026635U - Lateral flow membrane device - Google Patents

Abstract

The utility model belongs to the technical field of water purification, and particularly provides a side-flow membrane device, which aims to solve the problem that an existing side-flow membrane shell cannot carry out packaging test on a filter element with two pure water outlets. The side flow membrane device comprises an outer shell component, a first inner shell and a second inner shell, wherein a concentrated water flow channel is formed between the outer shell component and the filter element, and a raw water inlet, a pure water outlet and a concentrated water outlet are formed; a raw water flow passage which communicates the raw water inlet with the raw water inlet end surface is formed between the first inner shell and the raw water inlet end surface of the filter element, and two ends of the first inner shell are respectively connected with the outer shell component and the filter element in a sealing way; a pure water flow channel which is used for communicating the pure water outlet end face with the pure water outlet is formed between the second inner shell and the pure water outlet end face of the filter element, the water outlet end of the central tube of the filter element is communicated with the pure water outlet, and two ends of the second inner shell are respectively and hermetically connected with the outer shell component and the filter element. The side flow membrane device of the utility model can carry out encapsulation test on the filter element with two pure water outlets.

Description

Lateral flow membrane device

Technical Field

The utility model belongs to the technical field of water purification, and particularly provides a side flow membrane device.

Background

Along with the increasing promotion of the living standard of people, the requirements on the quality of drinking water are gradually increased. Water purifiers are becoming increasingly indispensable in people's daily lives. The filter element with large flow and long service life is the biggest pain point facing the current water purifier user, and how to improve the flow of the filter element and prolong the service life of the filter element is the biggest difficult problem facing the current industry.

In the prior art, a side-flow membrane shell is generally adopted to test the performance of a filter element, however, the existing side-flow membrane shell can only perform packaging test on the filter element with one pure water outlet, and cannot perform packaging test on the filter element with two pure water outlets.

Accordingly, there is a need in the art for a new sidestream membrane shell device to address the above-described problems.

Disclosure of Invention

In order to solve the problems in the prior art, namely, the problem that the existing side flow membrane shell cannot carry out packaging test on the filter element with two pure water outlets.

In a first aspect, the utility model provides a side-flow membrane device, comprising an outer shell assembly, a first inner shell and a second inner shell, wherein the first inner shell and the second inner shell are positioned in the outer shell assembly, the outer shell assembly is sleeved on a filter element, a concentrated water flow channel is formed between the outer shell assembly and the filter element, and a raw water inlet, a pure water outlet and a concentrated water outlet communicated with the concentrated water flow channel are arranged on the outer shell assembly; the first inner shell is sleeved at the water inlet end of the filter element and a raw water flow passage is formed between the first inner shell and the raw water inlet end surface of the filter element, the raw water flow passage is used for communicating the raw water inlet with the raw water inlet end surface, and two ends of the first inner shell are respectively connected with the outer shell component and the filter element in a sealing way so as to separate the raw water flow passage from the concentrated water flow passage; the second inner shell is sleeved at the water outlet end of the filter element and a pure water flow passage is formed between the second inner shell and the pure water outlet end face of the filter element, the pure water flow passage is used for communicating the pure water outlet end face with the pure water outlet, the water outlet end of the central tube of the filter element is communicated with the pure water outlet, and two ends of the second inner shell are respectively and hermetically connected with the outer shell component and the filter element so as to separate the pure water flow passage from the concentrated water flow passage.

Under the condition of adopting the technical scheme, a concentrated water flow channel is formed between the shell component of the side flow membrane device and the filter element, and the concentrated water flow channel is communicated with a concentrated water outlet; a raw water runner is formed between the first inner shell and the raw water inlet end surface of the filter element, and the raw water runner is communicated with a raw water inlet; a pure water flow passage is formed between the second inner shell and the pure water outlet end face of the filter element, and the pure water flow passage is communicated with a pure water outlet; the water outlet end of the central tube of the filter element is also communicated with the pure water outlet; therefore, the side flow membrane device provided by the utility model is provided with four flow channels, so that the filter element with two pure water outlets can be subjected to packaging test, and the blank of the prior art is filled.

In the preferred technical scheme of the lateral flow membrane device, the shell assembly comprises a first shell, a second shell and a shell main body positioned between the first shell and the second shell, two ends of the shell main body are respectively in sealing connection with the first shell and the second shell, the raw water inlet is arranged in the first shell, the pure water outlet is arranged in the second shell, the concentrated water outlet is arranged in the shell main body, and the concentrated water channel is formed between the shell main body and the filter element.

Under the condition of adopting the technical scheme, the shell component of the side flow membrane device comprises the first shell, the second shell and the shell main body which are in sealing connection, and through the arrangement, the filter element is more convenient to install and detach on the basis of ensuring the tightness of the shell component, and the use experience of a user is better.

In the above preferred technical solution of the lateral flow membrane device, the first housing includes a first outer cylinder and a first outer end plate, one end of the first outer cylinder is in sealing connection with one end of the housing main body, the other end of the first outer cylinder is in sealing connection with the first outer end plate, and the raw water inlet is disposed in the first outer end plate.

In the preferred technical scheme of the lateral flow membrane device, the first inner shell comprises a first inner cylinder body and a first inner end plate, one end of the first inner cylinder body is in sealing connection with the filter element, the other end of the first inner cylinder body is in sealing connection with the first inner end plate, the raw water flow channel is formed between the first inner end plate and the raw water inlet end face, a first tubular connection structure is arranged on the first outer end plate, a second tubular connection structure is arranged on the first inner end plate, one end of the first tubular connection structure is communicated with the raw water inlet, the other end of the first tubular connection structure is communicated with one end of the second tubular connection structure, and the other end of the second tubular connection structure is communicated with the raw water flow channel.

In the preferred technical scheme of the lateral flow membrane device, the second tubular connecting structure is inserted into the first tubular connecting structure, and a first sealing ring is arranged between the first tubular connecting structure and the second tubular connecting structure.

Under the condition of adopting the technical scheme, the sealing effect between the first outer shell and the first inner shell can be improved, and the accuracy of the test result is prevented from being influenced due to raw water leakage.

In the preferred technical scheme of the lateral flow membrane device, the second housing comprises a second outer cylinder body and a second outer end plate, one end of the second outer cylinder body is in sealing connection with the other end of the housing main body, the other end of the second outer cylinder body is in sealing connection with the second outer end plate, and the pure water outlet is formed in the second outer end plate.

In the preferred technical scheme of the lateral flow membrane device, the second inner shell comprises a second inner cylinder body and a second inner end plate, one end of the second inner cylinder body is in sealing connection with the filter element, the other end of the second inner cylinder body is in sealing connection with the second inner end plate, the pure water flow channel is formed between the second inner end plate and the pure water outlet end face, a third tubular connection structure is arranged on the second outer end plate, a fourth tubular connection structure is arranged on the second inner end plate, one end of the third tubular connection structure is communicated with the pure water outlet, the other end of the third tubular connection structure is communicated with one end of the fourth tubular connection structure, and the other end of the fourth tubular connection structure is communicated with the pure water flow channel.

In the preferred technical scheme of the lateral flow membrane device, the fourth tubular connecting structure is inserted into the third tubular connecting structure, and a second sealing ring is arranged between the fourth tubular connecting structure and the third tubular connecting structure.

Under the condition of adopting the technical scheme, the sealing effect between the second outer shell and the second inner shell can be improved, and the influence on the accuracy of the test result due to the leakage of pure water is prevented.

In the preferred technical scheme of the lateral flow membrane device, a first annular connecting structure is arranged on the first shell, a second annular connecting structure is arranged on the second shell, a third annular connecting structure and a fourth annular connecting structure are respectively arranged at two ends of the shell main body, a first rubber gasket is arranged between the first annular connecting structure and the third annular connecting structure and is fixedly connected through a first clamp, and a second rubber gasket is arranged between the second annular connecting structure and the fourth annular connecting structure and is fixedly connected through a second clamp.

Under the condition of adopting the technical scheme, on the basis of guaranteeing the tightness of the shell component, the installation and the disassembly of the filter element are more facilitated, and the use experience of a user is further improved.

In a preferred embodiment of the lateral flow membrane device, the outer housing assembly is made of a metal material, and the first inner housing and the second inner housing are made of a plastic material.

Under the condition of adopting the technical scheme, the shell component is made of metal materials, so that the durability is improved; the inner shell is made of plastic materials, so that the filter element is convenient to be connected with the filter element in a sealing mode, and cost is saved.

Drawings

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:

FIG. 1 is an exploded schematic view of a lateral flow membrane device of the present utility model;

FIG. 2 is a schematic view of the structure of a lateral flow membrane device of the present utility model;

FIG. 3 is a schematic longitudinal section of a lateral flow membrane device of the present utility model;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a partial enlarged view at B in FIG. 3;

FIG. 6 is a schematic view of a cartridge having two pure water outlets;

FIG. 7 is a schematic diagram II of a cartridge having two pure water outlets.

List of reference numerals:

1. a housing assembly; 11. a first housing; 111. a first outer cylinder; 1111. a first annular connection structure; 112. a first outer end plate; 1121. a raw water inlet; 1122. a first tubular connection structure; 12. a second housing; 121. a second outer cylinder; 1211. a second annular connection structure; 122. a second outer end plate; 1221. a pure water outlet; 1222. a third tubular connection structure; 13. a housing main body; 131. a concentrated water outlet; 132. a third annular connection structure; 133. a fourth annular connection structure; 14. a first rubber gasket; 15. a second rubber gasket; 16. a first clip; 17. a second clip;

2. a first inner housing; 21. a first inner cylinder; 22. a first inner end plate; 221. a second tubular connection structure; 23. a first seal ring;

3. a second inner case; 31. a second inner cylinder; 32. a second inner end plate; 321. a fourth tubular connection structure; 33. a second seal ring;

4. a filter element; 41. raw water inlet end face; 42. a pure water outlet end face; 43. a central tube;

5. a concentrated water flow passage;

6. a raw water flow passage;

7. pure water flow channel.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

It should be noted that, in the description of the present utility model, terms such as "inner", "outer", "upper", "lower", "left", "right", and the like, which indicate directions or positional relationships are based on the directions or positional relationships shown in the drawings, are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," "fourth," and the like 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 utility model, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "mounted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Based on the background technology, the utility model provides a side flow membrane device, which aims to provide a side flow membrane device with four flow channels.

In particular, referring first to fig. 1-3, wherein fig. 1 is an exploded schematic view of a lateral flow membrane device of the present utility model; FIG. 2 is a schematic view of the structure of a lateral flow membrane device of the present utility model; FIG. 3 is a schematic vertical sectional view of a lateral flow membrane device of the present utility model.

As shown in fig. 1 to 3, the current measuring membrane device of the present utility model includes an outer housing assembly 1, and a first inner housing 2 and a second inner housing 3 inside the outer housing assembly 1.

Wherein, the shell component 1 is sleeved on the filter element 4, and a concentrated water flow channel 5 is formed between the shell component 1 and the filter element 4, and in addition, a raw water inlet 1121, a pure water outlet 1221 and a concentrated water outlet 131 communicated with the concentrated water flow channel 5 are arranged on the shell component 1.

The first inner case 2 is fitted over the water inlet end of the filter element 4 (left end of the filter element 4 as viewed in fig. 3), and a raw water flow passage 6 is formed between the first inner case 2 and the raw water inlet end surface 41 of the filter element 4 (see fig. 6 in detail), the raw water flow passage 6 communicates the raw water inlet 1121 of the outer case assembly 1 with the raw water inlet end surface 41 of the filter element 4, and in addition, both ends of the first inner case 2 are respectively connected with the outer case assembly 1 and the filter element 4 in a sealing manner to separate the raw water flow passage 6 from the concentrated water flow passage 5.

The second inner casing 3 is sleeved on the water outlet end of the filter element 4 (the right end of the filter element 4 as viewed in fig. 3), and a pure water flow passage 7 is formed between the second inner casing 3 and the pure water outlet end face 42 of the filter element 4 (see fig. 7 in detail), the pure water flow passage 7 communicates the pure water outlet end face 42 of the filter element 4 with the pure water outlet 1221 of the housing assembly 1, the water outlet end of the central tube 43 of the filter element 4 is also communicated with the pure water outlet 1221 of the housing assembly 1, and in addition, both ends of the second inner casing 3 are respectively connected with the housing assembly 1 and the filter element 4 in a sealing manner to separate the pure water flow passage 7 from the concentrate water flow passage 5.

As known from the background art, the side-flow membrane shell of the prior art can only perform the packaging test on the filter element with one pure water outlet, but cannot perform the packaging test on the filter element with two pure water outlets, as shown in fig. 6 and 7, compared with the filter element with one pure water outlet (the water outlet of the central tube), the filter element with two pure water outlets has one pure water outlet end face 42 added, and the pure water outlet end face 42 forms a new pure water outlet, and the original central tube water outlet is added, so that the total of two pure water outlets are formed.

The side flow membrane device of the present utility model has four flow channels, and is capable of performing a package test on a cartridge having two pure water outlets, specifically, as shown in fig. 3, raw water enters a raw water flow channel 6 (first flow channel) from a raw water inlet 1121 on a housing assembly 1, flows along the raw water flow channel 6 to a cartridge 4, and starts filtration from a raw water inlet end surface 41 (left end surface of the cartridge 4 as viewed in fig. 3) of the cartridge 4 into the interior of the cartridge 4, concentrated water generated by filtration of the cartridge 4 enters a concentrated water flow channel 5 (second flow channel) and is discharged from a concentrated water outlet 131, pure water generated by the cartridge 4 enters a center tube 43 of the cartridge 4 and flows along the center tube 43 (third flow channel) to a pure water outlet 1221, and the other flows from a pure water outlet end surface 42 (right end surface of the cartridge 4 as viewed in fig. 3) of the cartridge 4 into a pure water flow channel 7 (fourth flow channel), and flows along the pure water flow channel 7 to the pure water outlet 1221.

It should be noted that, in practical application, the water outlet of the central tube 43 of the filter element 4 may be directly connected to the pure water outlet 1221 of the housing assembly 1, or the water outlet of the central tube 43 may be indirectly connected to the pure water outlet 1221 through the pure water flow channel 7, that is, the pure water flowing out of the central tube 43 enters the pure water flow channel 7 first and then flows to the pure water outlet 1221 along the pure water flow channel 7, which is flexibly adjusted and changed without departing from the principle and scope of the present utility model.

Preferably, as shown in fig. 1 to 3, the housing assembly 1 of the present utility model includes a first housing 11, a second housing 12, and a housing main body 13 between the first housing 11 and the second housing 12, both ends of the housing main body 13 being respectively hermetically connected to the first housing 11 and the second housing 12.

Wherein, the concentrated water outlet 131 is provided in the housing main body 13, the raw water inlet 1121 is provided in the first housing 11, the pure water outlet 1221 is provided in the second housing 12, and the concentrated water flow passage 5 is formed between the housing main body 13 and the filter element 4.

Illustratively, the first housing 11 is located at the left side of the housing main body 13, the second housing 12 is located at the right side of the housing main body 13, the left end of the housing main body 13 is sealingly connected with the right end of the first housing 11, and the right end of the housing main body 13 is sealingly connected with the left end of the second housing 12.

It should be noted that, in practical application, the housing assembly 1 is not limited to the above-described three-part structure formed by the "first housing 11+second housing 12+housing main body 13", for example, those skilled in the art may also set the housing assembly 1 to a two-part structure, that is, example 1, that the housing main body 13 is integrally formed with the first housing 11, that the original second housing 12 is added, that the two-part structure is formed, that example 2, that the housing main body 13 is integrally formed with the second housing 12, that the original first housing 11 is added, that the two-part structure is added, that the housing main body 13 is divided into two parts, that the two parts are respectively integrally formed with the first housing 11 and the second housing 12, and so on, and that such flexible adjustment and modification do not deviate from the principle and scope of the present utility model, which shall be limited to the scope of the present utility model.

Of course, the housing assembly 1 is preferably set to the structure form of the first housing 11, the second housing 12 and the housing main body 13, so that the filter element 4 is more convenient to install and detach on the basis of ensuring the tightness of the housing assembly 1, and the use experience of a user is better.

Preferably, as shown in fig. 1 to 3, a first annular connection structure 1111 is provided on the first housing 11, a second annular connection structure 1211 is provided on the second housing 12, a third annular connection structure 132 and a fourth annular connection structure 133 are provided at both ends of the housing main body 13, a first rubber gasket 14 is provided between the first annular connection structure 1111 and the third annular connection structure 132 and is fixedly connected through a first clip 16, and a second rubber gasket 15 is provided between the second annular connection structure 1211 and the fourth annular connection structure 133 and is fixedly connected through a second clip 17.

Illustratively, the first annular connection structure 1111 is located at the right end portion of the first housing 11, the third annular connection structure 132 is located at the left end portion of the housing main body 13, the first rubber gasket 14 seals between the first annular connection structure 1111 and the third annular connection structure 132, the second annular connection structure 1211 is located at the left end portion of the second housing 12, the fourth annular connection structure 133 is located at the right end portion of the housing main body 13, the second rubber gasket 15 seals between the second annular connection structure 1211 and the fourth annular connection structure 133, and the concentrated water is prevented from leaking between the second annular connection structure 1211 and the fourth annular connection structure 133.

The connection method between the housing main body 13 and the first housing 11 and the second housing 12 is not limited to the connection method of the "annular connection structure+rubber seal ring+clip" described above, and may be any connection method as long as the sealing property is ensured, for example, a screw structure sealing connection or the like is adopted.

Of course, the connection mode of the annular connection structure, the rubber sealing ring and the clamp is preferably adopted, so that the installation and the disassembly of the filter element 4 are facilitated on the basis of guaranteeing the tightness of the shell assembly 1, and the use experience of a user is further improved.

In addition, the specific location of the concentrated water outlet 131 on the housing main body 13 is not limited, for example, the concentrated water outlet 131 may be disposed at a middle position of the housing main body 13, or the concentrated water outlet 131 may be disposed at other positions on the housing main body 13 according to actual requirements.

Preferably, as shown in fig. 1 to 4, the first housing 11 is composed of a first outer cylinder 111 and a first outer end plate 112, wherein one end of the first outer cylinder 111 is hermetically connected to one end of the housing main body 13, the other end of the first outer cylinder 111 is hermetically connected to the first outer end plate 112, and the raw water inlet 1121 is provided at the first outer end plate 112.

Illustratively, the first outer end plate 112 is located at the left end of the first outer cylinder 111, and the first outer end plate and the first outer cylinder 111 are integrally provided, and the first annular connection structure 1111 is disposed at the right end of the first outer cylinder 111 to seal the first outer cylinder 111 with the housing main body 13, and the raw water inlet 1121 is located at the middle position of the first outer end plate 112.

The first outer end plate 112 and the first outer cylinder 111 are not limited to be integrally provided, and may be sealed and connected by welding, for example.

Preferably, as shown in fig. 1 to 4, the first inner casing 2 is composed of a first inner cylinder 21 and a first inner end plate 22, one end of the first inner cylinder 21 is in sealing connection with the filter element 4, the other end of the first inner cylinder 21 is in sealing connection with the first inner end plate 22, the raw water flow channel 6 is formed between the first inner end plate 22 and the raw water inlet end surface 41 of the filter element 4, a first tubular connection structure 1122 is provided on the first outer end plate 112, a second tubular connection structure 221 is provided on the first inner end plate 22, one end of the first tubular connection structure 1122 is communicated with the raw water inlet 1121, the other end of the first tubular connection structure 1122 is communicated with one end of the second tubular connection structure 221, and the other end of the second tubular connection structure 221 is communicated with the raw water flow channel 6.

Illustratively, the first inner end plate 22 is located at the left end of the first inner cylinder 21, the first inner end plate and the first inner cylinder 21 are integrally provided, the right end of the first inner cylinder 21 is sleeved at the left end of the filter element 4, the first inner end plate and the second inner cylinder are sealed by filling sealant, so that concentrated water is prevented from entering the raw water flow channel 6, raw water can be prevented from entering the concentrated water flow channel 5, the first tubular connecting structure 1122 is arranged at the inner side surface of the first outer end plate 112, the left end of the first tubular connecting structure 1122 is communicated with the raw water inlet 1121 on the first outer end plate 112, the second tubular connecting structure 221 is formed at the outer side surface of the first inner end plate 22, the left end of the second tubular connecting structure 221 is communicated with the right end of the first tubular connecting structure 1122, the first inner end plate 22 is provided with a through hole at a position corresponding to the second tubular connecting structure 221, so that the right end of the second tubular connecting structure 221 is communicated with the raw water flow channel 6, and raw water enters the raw water flow channel 6 along the first tubular connecting structure 1122 and the second tubular connecting structure 221 in sequence after raw water enters from the raw water inlet 1121.

It should be noted that, the first inner shell 2 is not limited to the above-described structure of the "end plate and inner shell", for example, the first inner end plate 22 and the second tubular connection structure 221 on the first inner end plate may be omitted, and the left end of the first inner shell 21 may be directly connected with the inner side surface of the first outer end plate 112 in a sealing manner, which is not limited by the principle and scope of the present utility model, and the specific structure of the first inner shell 2 may be modified and changed without departing from the scope of the present utility model.

Of course, the first inner shell 2 is preferably provided in the above-mentioned structure of the first inner cylinder 21 and the first inner end plate 22, so that the first inner shell 2 and the first outer shell 11 can be more conveniently connected in a sealing manner.

Note that, the first inner end plate 22 and the first inner cylinder 21 are not limited to being integrally provided, and may be sealed and connected by welding, for example.

Preferably, as shown in fig. 3 and 4, the second tubular connecting structure 221 is inserted into the first tubular connecting structure 1122, and the first seal ring 23 is disposed between the first tubular connecting structure 1122 and the second tubular connecting structure 221.

Illustratively, the outer wall of the second tubular connecting structure 221 is provided with an annular groove, and when assembled, the first seal ring 23 is placed in the annular groove, and then the second tubular connecting structure 221 and the first seal ring 23 are inserted into the first tubular connecting structure 1122 together.

In practical applications, the first tubular connection structure 1122 may be inserted into the second tubular connection structure 221, and of course, the present utility model preferably employs a form in which the second tubular connection structure 221 is inserted into the first tubular connection structure 1122, which is more convenient for assembly.

Preferably, as shown in fig. 1 to 4, the second housing 12 is composed of a second outer cylinder 121 and a second outer end plate 122, wherein one end of the second outer cylinder 121 is hermetically connected to one end of the housing main body 13, the other end of the second outer cylinder 121 is hermetically connected to the second outer end plate 122, and the pure water outlet 1221 is provided to the second outer end plate 122.

Illustratively, the second outer end plate 122 is located at the right end of the second outer cylinder 121, and the two are integrally provided, the second annular connecting structure 1211 is provided at the left end of the second outer cylinder 121, and the second outer cylinder 121 is hermetically connected to the housing main body 13, and the pure water outlet 1221 is located at the middle position of the second outer end plate 122.

The second outer end plate 122 and the second outer cylinder 121 are not limited to be integrally provided, and may be sealed and connected by welding, for example.

Preferably, as shown in fig. 1 to 4, the second inner casing 3 is composed of a second inner cylinder 31 and a second inner end plate 32, one end of the second inner cylinder 31 is in sealing connection with the filter element 4, the other end of the second inner cylinder 31 is in sealing connection with the second inner end plate 32, the pure water flow passage 7 is formed between the second inner end plate 32 and the pure water outlet end face 42 of the filter element 4, a third tubular connection structure 1222 is provided on the second outer end plate 122, a fourth tubular connection structure 321 is provided on the second inner end plate 32, one end of the third tubular connection structure 1222 is communicated with the pure water outlet 1221, the other end of the third tubular connection structure 1222 is communicated with one end of the fourth tubular connection structure 321, and the other end of the fourth tubular connection structure 321 is communicated with the pure water flow passage 7.

Illustratively, the second inner end plate 32 is located at the right end of the second inner cylinder 31, the two are integrally disposed, the left end of the second inner cylinder 31 is sleeved at the right end of the filter element 4, the two are sealed by filling sealant, so as to prevent concentrated water from entering into the pure water flow channel 7, and also prevent pure water from entering into the concentrated water flow channel 5, the third tubular connection structure 1222 is disposed at the inner side surface of the second outer end plate 122, the right end of the fourth tubular connection structure 321 is communicated with the pure water outlet 1221 on the second outer end plate 122, the fourth tubular connection structure 321 is formed at the outer side surface of the second inner end plate 32, the right end of the fourth tubular connection structure 321 is communicated with the left end of the third tubular connection structure 1222, and the second inner end plate 32 is provided with a through hole at a position corresponding to the fourth tubular connection structure 321, so that the left end of the fourth tubular connection structure 321 is communicated with the pure water flow channel 7, pure water flows out from the pure water outlet end surface 42, enters into the pure water flow channel 7, and then sequentially enters into the pure water outlet 1222 along the fourth tubular connection structure 321 and the third tubular connection structure 1222.

It should be noted that, the second inner casing 3 is not limited to the above-described structure of the "end plate and inner casing", for example, the second inner end plate 32 and the fourth tubular connection structure 321 on the second inner end plate 32 may be omitted, and the right end of the second inner casing 31 may be directly connected with the inner side surface of the second outer end plate 122 in a sealing manner, and the specific structure of the second inner casing 3 may be adjusted and changed without departing from the principle and scope of the present utility model, which should be limited to the protection scope of the present utility model.

The second inner end plate 32 and the second inner cylinder 31 are not limited to being integrally provided, and may be sealed and connected by welding, for example.

Preferably, as shown in fig. 3 and 5, the fourth tubular connecting structure 321 is inserted into the third tubular connecting structure 1222, and the second sealing ring 33 is disposed between the third tubular connecting structure 1222 and the fourth tubular connecting structure 321.

Illustratively, an annular groove is provided on the outer wall of the fourth tubular connecting structure 321, and during assembly, the second seal ring 33 is placed in the annular groove, and then the fourth tubular connecting structure 321 and the second seal ring 33 are inserted into the third tubular connecting structure 1222 together.

In practical applications, the third tubular connecting structure 1222 may be inserted into the fourth tubular connecting structure 321, and of course, the present utility model preferably adopts a form of inserting the fourth tubular connecting structure 321 into the third tubular connecting structure 1222, which is more convenient for assembly.

Preferably, the outer housing assembly 1 is made of a metal material, and the first inner housing 2 and the second inner housing 3 are both made of a plastic material.

It will be appreciated by those skilled in the art that the materials of the outer shell assembly 1, the first inner shell 2 and the second inner shell 3 are not limited, and may be made of other materials without affecting the sealing connection of the membrane shells.

Those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments. For example, in the claims of the present utility model, any of the claimed embodiments may be used in any combination.

Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims (10)

1. A lateral flow membrane device is characterized by comprising an outer shell assembly, a first inner shell and a second inner shell which are positioned in the outer shell assembly,

the shell component is sleeved on the filter element and forms a concentrated water flow channel with the filter element, the shell component is provided with a raw water inlet, a pure water outlet and a concentrated water outlet communicated with the concentrated water flow channel,

the first inner shell is sleeved at the water inlet end of the filter element and a raw water flow passage is formed between the first inner shell and the raw water inlet end surface of the filter element, the raw water flow passage is used for communicating the raw water inlet with the raw water inlet end surface, and two ends of the first inner shell are respectively connected with the outer shell component and the filter element in a sealing way so as to separate the raw water flow passage from the concentrated water flow passage;

the second inner shell is sleeved at the water outlet end of the filter element and a pure water flow passage is formed between the second inner shell and the pure water outlet end face of the filter element, the pure water flow passage is used for communicating the pure water outlet end face with the pure water outlet, the water outlet end of the central tube of the filter element is communicated with the pure water outlet, and two ends of the second inner shell are respectively and hermetically connected with the outer shell component and the filter element so as to separate the pure water flow passage from the concentrated water flow passage.

2. The lateral flow membrane device of claim 1, wherein the housing assembly comprises a first housing, a second housing, and a housing body between the first housing and the second housing, the housing body having two ends sealingly connected to the first housing and the second housing, respectively,

the raw water inlet is arranged on the first shell, the pure water outlet is arranged on the second shell, the concentrated water outlet is arranged on the shell main body, and the concentrated water channel is formed between the shell main body and the filter element.

3. The lateral flow membrane device of claim 2, wherein the first housing comprises a first outer cylinder and a first outer end plate, one end of the first outer cylinder is in sealing connection with one end of the housing body, the other end of the first outer cylinder is in sealing connection with the first outer end plate, and the raw water inlet is provided in the first outer end plate.

4. The lateral flow membrane device as claimed in claim 3, wherein said first inner housing comprises a first inner cylinder and a first inner end plate, one end of said first inner cylinder is in sealing connection with said filter cartridge, the other end of said first inner cylinder is in sealing connection with said first inner end plate, said raw water flow passage is formed between said first inner end plate and said raw water inlet end face,

the device comprises a first outer end plate, a first inner end plate, a first barrel-shaped connecting structure, a second barrel-shaped connecting structure, a raw water inlet, a raw water channel and a raw water channel, wherein the first outer end plate is provided with the first barrel-shaped connecting structure, the first inner end plate is provided with the second barrel-shaped connecting structure, one end of the first barrel-shaped connecting structure is communicated with the raw water inlet, the other end of the first barrel-shaped connecting structure is communicated with one end of the second barrel-shaped connecting structure, and the other end of the second barrel-shaped connecting structure is communicated with the raw water channel.

5. The lateral flow membrane device of claim 4, wherein the second tubular connection is inserted into the first tubular connection, and a first seal ring is disposed between the first tubular connection and the second tubular connection.

6. The lateral flow membrane device of claim 2, wherein the second housing comprises a second outer cylinder and a second outer end plate, one end of the second outer cylinder is in sealing connection with the other end of the housing body, the other end of the second outer cylinder is in sealing connection with the second outer end plate, and the pure water outlet is provided in the second outer end plate.

7. The sidestream membrane apparatus of claim 6, wherein said second inner housing comprises a second inner cylinder and a second inner end plate, one end of said second inner cylinder being sealingly connected to said cartridge, the other end of said second inner cylinder being sealingly connected to said second inner end plate, said purified water flow passage being formed between said second inner end plate and said purified water outlet end face,

the second outer end plate is provided with a third tubular connection structure, the second inner end plate is provided with a fourth tubular connection structure, one end of the third tubular connection structure is communicated with the pure water outlet, the other end of the third tubular connection structure is communicated with one end of the fourth tubular connection structure, and the other end of the fourth tubular connection structure is communicated with the pure water flow channel.

8. The lateral flow membrane device of claim 7, wherein the fourth tubular connection is inserted into the third tubular connection, and a second seal ring is disposed between the fourth tubular connection and the third tubular connection.

9. The lateral flow membrane device according to claim 2, wherein a first annular connecting structure is arranged on the first housing, a second annular connecting structure is arranged on the second housing, a third annular connecting structure and a fourth annular connecting structure are respectively arranged at two ends of the housing main body, a first rubber gasket is arranged between the first annular connecting structure and the third annular connecting structure and is fixedly connected through a first clamp, and a second rubber gasket is arranged between the second annular connecting structure and the fourth annular connecting structure and is fixedly connected through a second clamp.

10. The lateral flow membrane device of any one of claims 1 to 9, wherein the outer housing assembly is made of a metallic material and the first inner housing and the second inner housing are each made of a plastic material.