CN212315644U - Filter element assembly and water purifier with same - Google Patents

Abstract

The utility model provides a filter element group spare and purifier that has it. The filter element assembly comprises: the filter flask comprises a raw water port, a pure water port and a concentrated water port; and the filter element is arranged in the filter flask and comprises a central tube and a membrane bag wound on the central tube. The side wall of the central tube is provided with a plurality of through holes. The membrane bag comprises a membrane bag raw water port and a membrane bag concentrated water port. The inside wall of filter flask and the lateral wall of filter core are spaced apart to form the pure water district between the two, wherein, the former mouth of a river of center tube intercommunication, the former mouth of a river of a plurality of through-holes intercommunication membrane bags of center tube, pure water district intercommunication pure water mouth, the dense mouth of a river of membrane bag intercommunication. Therefore, the filter element assembly with the structure has small inner cavity volume of the central tube, and the storage amount of raw water is not large. Therefore, even if the filter element is placed for a long time, the phenomenon of diffusion occurs, the pure water can also dilute the concentration of ions in the water by utilizing the advantages of the stock, and the TDS of the first section of water received by a user is prevented from being too high.

Description

Filter element assembly and water purifier with same

Technical Field

The utility model relates to a technical field of aqueous cleaning specifically, relates to a filter element group spare and purifier that has it.

Background

With the pursuit of the public on the quality of life, the water purifier gradually enters the families of people. Reverse osmosis water purifiers are becoming more popular because the purified water produced by them is fresher, more sanitary and safer.

The reverse osmosis filter element is a core component of the reverse osmosis water purifier. The reverse osmosis filter element is made by winding a reverse osmosis membrane around a central tube. Raw water mostly has high TDS (total dissolved solids), enters the reverse osmosis membrane from the peripheral side of the reverse osmosis membrane for filtration, pure water generated by filtration flows into the central tube, and waste water flows out from the end face of the reverse osmosis membrane.

After water production is finished, a small amount of concentrated water is left in the reverse osmosis filter element before the reverse osmosis membrane, a large amount of unfiltered raw water is stored in the filter flask, and a small amount of pure water is stored in the central tube. After long-time shutdown, ions are diffused from the high-concentration solution to the low-concentration solution due to the fact that no pressure exists in front of the membrane, and ions in the concentrated water in front of the membrane and a large amount of ions in the raw water are diffused into the purified pure water behind the membrane, so that the pure water in the central pipe is polluted. And since the amount of pure water is much less than the amounts of raw water and concentrated water, TDS of pure water will be significantly increased through a diffusion phenomenon.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art at least in part, the utility model provides a filter element assembly, it includes: the filter flask comprises a raw water port, a pure water port and a concentrated water port; and the filter element is arranged in the filter flask, the filter element comprises a central tube and a membrane bag wound on the central tube, a plurality of through holes are formed in the side wall of the central tube, the membrane bag comprises a membrane bag raw water port and a membrane bag thick water port, the inner side wall of the filter flask is spaced from the outer side wall of the filter element to form a pure water area between the two, wherein the central tube is communicated with the raw water port, the central tube is communicated with the plurality of through holes, the membrane bag raw water port is communicated with the pure water port, and the membrane bag thick water port is communicated with the thick water port.

It can be seen that, in the filter element assembly with the above structure, raw water to be filtered is retained in the central tube, but the volume of the inner cavity of the central tube is small, so that the raw water is not stored in a large amount. The pure water generated by filtration is coated on the periphery of the filter element and is far larger than the total amount of the raw water in the central tube and the concentrated water in the membrane bag. Therefore, even if the filter element is placed for a long time, the phenomenon of diffusion occurs, the pure water can also dilute the concentration of ions in the water by utilizing the advantages of the stock, and the TDS of the first section of water received by a user is prevented from being too high.

Illustratively, the raw water ports include a first raw water port, the concentrate water port includes a first concentrate water port, the filter flask has opposite first and second ends, the first raw water port, the first concentrate water port and the pure water port are disposed at the first end, an end portion of the central tube near the first end is a first water inlet end, the first water inlet end is communicated to the first raw water port, the membrane bag concentrate water port includes a first membrane bag concentrate water port, the first membrane bag concentrate water port is disposed on an end surface of the wound membrane bag near the first end, and the first membrane bag concentrate water port is communicated to the first concentrate water port.

Therefore, the first original water port, the first concentrated water port and the pure water port of the filter flask are arranged at the same end of the filter flask, so that the pipeline connected to the filter flask is simple in arrangement and more convenient to connect, and a user only needs to connect at one end of the filter flask. Or if the filter base connected and installed with the filter flask is arranged, the first end of the filter flask is only required to be inserted into the filter base, and the water port of the filter flask is connected with the water port of the filter base correspondingly, so that the filter base is convenient for a user to install.

Illustratively, the filter flask includes a bottle body, a water flow separation cap and a first filter element end cap, the water flow separation cap is connected to the bottle body at a first end, the first water inlet end of the center tube passes through the first filter element end cap to connect with the water flow separation cap, one end of the first filter element end cap is connected with the water flow separation cap, the other end of the first filter element end cap is connected with an end portion of the wound membrane bag near the first end, a first concentrate water flow channel communicating the first membrane bag concentrate port and the first concentrate port is formed between the center tube and the first filter element end cap, and a pure water flow channel communicating the pure water region and the pure water port is formed between the first filter element end cap and the bottle body.

Therefore, the filter flask with the arrangement is simple in structure and convenient to connect, the water flow separation cap and the first filter element end cap can be connected to form water flow channels which are not communicated with each other, and separation of concentrated water and pure water is facilitated.

Illustratively, the water flow divider cap includes a first annular wall, a second annular wall, and a third annular wall about the axis of the filter flask, wherein the second annular wall is located at the periphery of the first annular wall, the third annular wall is located at the periphery of the second annular wall, the first annular wall is connected to the first water inlet end of the center tube, the second annular wall is connected to the first filter cartridge end cap, and the third annular wall is connected to the filter flask.

Therefore, the water flow separation cap with the structure can form a pure water flow channel and a first concentrated water flow channel simultaneously, so that the structure inside the filter flask is simplified, the volume of the filter flask is reduced, and the integration level of the filter element assembly is improved.

Illustratively, an end of the center tube near the second end is closed, wherein, of the plurality of through holes of the center tube, a hole diameter of the through hole near the first water inlet end is smaller than a hole diameter of the through hole near the closed end.

Thus, after raw water enters the central tube, the water flow resistance formed by the through holes with large hole diameters is small, and the water flow resistance formed by the through holes with small hole diameters is large, so that the raw water can be promoted to flow towards the second end of the central tube and enter the membrane bag through the through holes at the second end. And first membrane bag dense mouth of a river sets up the tip near first end, and the raw water that gets into the membrane bag then will flow along the direction of arrow, and the route that the raw water passed through in the membrane bag will be longer, makes the raw water can be filterable more abundant to can filter by the whole membrane bag of make full use of, consequently this filter element group spare filtration performance is more excellent.

Illustratively, the raw water gap further comprises a second raw water gap arranged at the second end, the concentrated water gap further comprises a second concentrated water gap arranged at the second end, the end part of the central pipe close to the second end is a second water inlet end, the second water inlet end is communicated to the second raw water gap, the membrane bag concentrated water gap further comprises a second membrane bag concentrated water gap arranged on the end surface of the wound membrane bag close to the second end, and the second membrane bag concentrated water gap is communicated to the second concentrated water gap.

Therefore, the second end of the filter flask is provided with the second raw water inlet and the second concentrated water inlet, so that the raw water inlet amount and the concentrated water discharge amount of the filter element assembly can be improved, and the filter capacity of the filter element assembly can be effectively improved by improving the water inlet amount.

Illustratively, the filter flask further comprises a second filter element end cap located within the flask, the second filter element end cap connected between the end of the flask and the end of the wound membrane bag at the second end, the center tube connected to the end of the flask through the second filter element end cap, and the second concentrate port located at the end of the flask, the center tube and the second filter element end cap forming a second concentrate water flow passage therebetween communicating the second concentrate port and the second membrane bag concentrate port.

Therefore, the arrangement is that the raw water inlet of the filter element assembly is increased, the concentrated water discharge port of the filter element assembly is also increased, the water flow circulation capacity of the filter element assembly is improved, and the filtering capacity of the filter element assembly is improved.

Illustratively, at the second end of the cartridge assembly, the body includes a fourth annular wall and a fifth annular wall extending inwardly from the end face of the body into the body, the fifth annular wall being located at a periphery of the fourth annular wall, the fourth annular wall being connected to the second inlet end of the center tube, and the fifth annular wall being connected to the second cartridge end cap.

Therefore, the bottle body and the second filter element end cap with the structure can form a second concentrated water flow channel, so that the internal structure of the bottle body and the second filter element end cap is simplified, and the integration level of the filter element assembly is improved.

According to another aspect of the present invention, there is provided a water purifier, comprising the filter element assembly as described above.

A series of concepts in a simplified form are introduced in the disclosure, which will be described in further detail in the detailed description section. The summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a cross-sectional view of a filter cartridge assembly according to an exemplary embodiment of the present invention;

FIG. 2 is an expanded view of a filter element of the filter cartridge assembly of FIG. 1;

fig. 3 is a cross-sectional view of a filter cartridge assembly according to another exemplary embodiment of the present invention; and

fig. 4 is an expanded view of a filter cartridge of the cartridge assembly of fig. 3.

Wherein the figures include the following reference numerals:

100. 100', a filter element assembly; 200. a filter flask; 201. a raw water port; 202. a pure water port; 203. a dense water port; 204. a pure water zone; 205. a pure water flow passage; 206. a first concentrate flow channel; 207. a second concentrate flow channel; 210. a first end; 201A, a first raw water port; 203A and a first concentrated water gap; 202. a pure water port; 220. a second end; 201B, a second raw water port; 203B and a second concentrated water gap; 300. 300', a filter element; 400. a central tube; 401. a first water inlet end; 402. a second water inlet end; 410. a through hole; 500. film bag; 501. a membrane bag raw water port; 502. a membrane bag dense water gap; 502A, a first membrane bag dense water gap; 502B, a second membrane bag dense water gap; 510. a wound film pouch; 600. a bottle body; 601. a fourth annular wall; 602. a fifth annular wall; 700. a water flow separating cap; 701. a first annular wall; 702. a second annular wall; 703. a third annular wall; 800. a first cartridge end cap; 900. a second cartridge end cap.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

Illustratively, as shown in fig. 1-2, a filter cartridge assembly 100 includes a filter bottle 200 and a filter cartridge 300. The filter flask 200 includes a raw water port 201, a pure water port 202, and a concentrate port 203. The cartridge 300 is disposed within the filter flask 200, the cartridge 300 including a center tube 400 and a membrane bag 500. The side wall of the center tube 400 is provided with a plurality of through holes 410. Illustratively, the plurality of through holes 410 may be aligned along the axis of the base pipe 400. The through-holes 410 communicate with the inner cavity of the center tube 400, and water introduced into the center tube 400 can flow out through the through-holes 410. The membrane bag 500 may be wrapped around the center tube 400, as shown in fig. 2, with the center tube 400 as a mandrel. Wherein, the membrane bag 500 comprises a membrane bag raw water port 501 and a membrane bag concentrated water port 502. The membrane bag raw water port 501 is communicated with a plurality of through holes 410. Former mouth of a river 501 of membrane bag and the dense mouth of a river 502 of membrane bag can set up the different sides at membrane bag 500, and like this, former water and dense water just can follow the direction of difference and flow in and flow out membrane bag 500, and the convenience is guided the water route of difference. For clarity of description, the film bag 500 is referred to herein as a rolled film bag 510 after being rolled onto the central tube 400, as shown in fig. 1.

The membrane bag 500 may be made of a reverse osmosis membrane. After raw water enters the membrane bag 500 from the membrane bag raw water port 501, pure water permeates out of the membrane bag 500 under the action of pressure, and non-permeated concentrated water flows out through the membrane bag concentrated water port 502. The operation of reverse osmosis membranes is well known to those skilled in the art and will not be described in detail herein.

The inner sidewall of the filter bottle 200 and the outer sidewall of the filter cartridge 300 are spaced apart to form a plain water zone 204 therebetween. The pure water zone 204 surrounds a wound membrane bag 510 that has been wound around the central tube 400. Under pressure, pure water permeating from the wound film pouch 510 will enter the pure water zone 204 along the gaps between the layers created after the film pouch 500 is wound.

The central pipe 400 is communicated with a raw water port 201, the pure water area 204 is communicated with a pure water port 202, and the membrane bag concentrated water port 502 is communicated with a concentrated water port 203. The plurality of through holes 410 of the central tube 400 are communicated with the membrane bag raw water port 501. Illustratively, the end of the membrane bag raw water port 501 of the membrane bag 500 may be connected to the central tube 400, and the membrane bag raw water port 501 may be communicated with the through hole 410, as shown in fig. 2. Thereafter, the film bag 500 is wound around the central tube 400 with the central tube 400 as an axis. Only one layer of the membrane bag 500 may be wound on the central tube 400; the multi-layer film bag 500 may also be simultaneously wound on the central tube 400.

It can be seen that the filter element assembly 100 having the above structure retains raw water to be filtered in the central tube 400, but the volume of the inner cavity of the central tube 400 is small, so that the amount of raw water is not large. And the pure water generated by the filtration is coated on the outer circumference of the filter element 300, which is much larger than the total amount of the raw water in the central tube 400 and the concentrated water in the membrane bag 500. Therefore, even if the filter element 300 is placed for a long time and the phenomenon of diffusion occurs, the pure water can dilute the concentration of ions in the water by using the advantages of the stock, and the TDS of the first section of water received by a user is prevented from being too high.

Illustratively, the filter bottle 200 has opposing first and second ends 210, 220. The raw water port 201 includes a first raw water port 201A, and the concentrate port 203 includes a first concentrate port 203A. Wherein the first raw water port 201A, the first concentrate port 203A and the pure water port 202 are all provided at the first end 210.

The central tube 400 comprises a first water inlet end 401, the first water inlet end 401 is close to the first end 210, and the first water inlet end 401 is communicated to the first raw water port 201A. The end of the central tube 400 opposite to the first water inlet end 401 may be closed, i.e. the central tube 400 may allow raw water to enter the central tube 400 only from the first water inlet end 401. The film bag concentrate outlet 502 includes a first film bag concentrate outlet 502A, and the first film bag concentrate outlet 502A may be provided on an end surface of the wound film bag 510 near the first end 210, and the first film bag concentrate outlet 502A is communicated to the first concentrate outlet 203A. Raw water enters the central tube 400 from the first raw water port 201A of the first end 210 of the filter flask 200, pure water enters the pure water area 204 after filtration, pure water is discharged from the pure water port 202 of the first end 210, and concentrated water is discharged from the first concentrated water port 203A close to the first end 210.

Therefore, the first raw water port 201A, the first concentrated water port 203A and the pure water port 202 of the filter flask 200 are all arranged at the same end of the filter flask 200, so that the pipeline connected to the filter flask 200 is simple to arrange and more convenient to connect, and a user only needs to connect at one end of the filter flask 200. Or if a filter base (not shown) connected with the filter bottle 200 is provided, the first end of the filter bottle 200 is inserted into the filter base, and the water port of the filter bottle 200 is correspondingly connected with the water port of the filter base, so that the filter base is convenient for a user to install.

Illustratively, the filter bottle 200 includes a bottle body 600, a flow separation cap 700, and a first cartridge end cap 800. The bottle 600 is configured to receive the cartridge 300. After the filter cartridge 300 is placed in the bottle body 600, the water flow separation cap 700 is coupled to the bottle body 600, thereby forming a sealed chamber. The end of the water separation cap 700 is located at the first end 210 of the filter flask 200. The water flow separating cap 700 is used for separating raw water, pure water and concentrated water from each other and communicating the raw water port 201, the pure water port 202 and the concentrated water port 203. In one embodiment, the water flow separation cap 700 and the bottle body 600 may be detachably connected by a screw connection or the like, or may be non-detachably connected by a welding or the like.

The first cartridge end cap 800 is disposed inside the filter flask 200, and may have a through hole for the central tube 400 to pass through, and the first water inlet end 401 of the central tube 400 passes through the through hole of the first cartridge end cap 800 and is connected to the water flow separation cap 700. First cartridge end cap 800 is connected at one end to water flow dividing cap 700 and at the other end to the end of wound membrane bag 510 proximate first end 210. That is, a first cartridge end cap 800 is disposed at the first end 210 of the interior of the filter flask 200 and is connected between the flow dividing cap 700 and the cartridge 300.

A first concentrate water flow passage 206 communicating the first membrane bag concentrate port 502A and the first concentrate port 203A is formed between the center tube 400 and the first cartridge end cap 800. The first concentrate flow channel 206 is located radially outward of the center tube 400 and radially inward of the first cartridge end cap 800. The first concentrate flow channel 206 is substantially annular. A pure water flow passage 205 is formed between the first cartridge end cap 800 and the bottle 600 to communicate the pure water region 204 and the pure water port 202. The pure water flow passage 205 is located radially outward of the first cartridge end cap 800 and radially inward of the bottle body 600. The pure water flow passage 205 is substantially annular. The first concentrate flow path 206 and the pure water flow path 205 are blocked from the flow dividing cap 700 by the first cartridge end cap 800 and do not communicate with each other. The structure of the water flow dividing cap 700 will be further described below.

The first cartridge end cap 800 can wrap the end face of the wound membrane bag 510 near the first end 210 such that concentrate exiting the first bag concentrate port 502A will be able to communicate to the first concentrate port 203A through the first concentrate flow passage 206 between the center tube 400 and the first cartridge end cap 800.

Therefore, the filter flask 200 with the above arrangement is simple in structure and convenient to connect, and water flow channels which are not communicated with each other can be formed by connecting the water flow separation cap 700 and the first filter element end cap 800, so that concentrated water and pure water can be conveniently separated.

Illustratively, the water flow dividing cap 700 includes a first annular wall 701, a second annular wall 702, and a third annular wall 703 that are coaxial with the axis of the filter flask 200. Wherein the second annular wall 702 is located at the periphery of the first annular wall 701 and the third annular wall 703 is located at the periphery of the second annular wall 702. The first annular wall 701 is connected to the first water inlet end 401 of the central tube 400. The second annular wall 702 is connected to the first cartridge end cap 800. The first cartridge end cap 800 is spaced from the first annular wall 701 to form the first concentrate flow passage 206. The third annular wall 703 is connected to the filter bottle 200, for example to the outer peripheral wall of the filter bottle 200.

The first concentrate flow channel 206 is defined by a first annular wall 701, a second annular wall 702, a center tube 400, and a first cartridge end cap 800. The first concentrate water flow passage 206 communicates the first concentrate port 203A and the first film bag concentrate port 502A. The pure water flow passage 205 is defined by the second annular wall 702, the third annular wall 703, and the first cartridge end cap 800. The pure water flow passage 205 communicates the pure water section 204 and the pure water port 202. Preferably, the cross-sections of the pure water flow passage 205 and the first concentrate flow passage 206 may be two concentric circular rings.

In order to prevent water leakage, the connection may be a sealing connection, and the sealing connection may be implemented by disposing a sealing element between two components, so as to achieve a sealing effect through the sealing element, where the sealing element may be a sealing ring, a sealing gasket, or the like. The sealing connection can also be realized by the matching relation between the components to achieve the sealing effect. Such sealing methods are well known to those skilled in the art and will not be described in detail.

Therefore, the water flow separating cap 700 with the structure can simultaneously form the pure water flow passage 205 and the first concentrated water flow passage 206, thereby simplifying the structure inside the filter flask 200, reducing the volume of the filter flask 200 and improving the integration level of the filter core assembly 100.

Illustratively, as shown in fig. 2, an end of the center tube 400 near the second end 220 is closed, wherein, among the plurality of through holes 410 of the center tube 400, a hole diameter of the through hole 410 near the first water inlet end 401 is smaller than a hole diameter of the through hole 410 near the closed end.

Thus, after the raw water enters the central tube 400, the water flow resistance of the through holes 410 with large aperture is small, and the water flow resistance of the through holes 410 with small aperture is large, so that the raw water can be promoted to flow towards the second end 220 of the central tube 400 and enter the membrane bag 500 through the through holes 410 at the second end 220. And the first membrane bag concentrate inlet 502A is disposed at the end portion near the first end 210, so that the raw water entering the membrane bag 500 flows in the direction of the arrow, the path of the raw water passing through the membrane bag 500 is longer, the raw water can be filtered more sufficiently, and the whole membrane bag 500 can be fully utilized for filtering, so that the filter core assembly 100 has better filtering performance.

Fig. 3-4 illustrate a filter element assembly 100' according to another embodiment of the present invention. The difference of this filter cartridge assembly 100 'compared to the filter cartridge assembly 100 shown in fig. 1-2 is that the raw water port 201 of the filter cartridge assembly 100' comprises, in addition to the first raw water port 201A, a second raw water port 201B provided at the second end 220, and the concentrate port 203 comprises, in addition to the first concentrate port 203A, a second concentrate port 203B provided at the second end 220. The end of the center tube 400 of the filter cartridge 300' near the first end 210 is a first water inlet end 401 and the end near the second end 220 is a second water inlet end 402. The first water inlet end 401 is identical to the first water inlet end 401 of the filter element assembly 100 shown in fig. 1-2 and therefore will not be described in further detail. The second water inlet end 402 is connected to the second raw water port 201B. The film bag concentrate port 502 includes, in addition to the first film bag concentrate port 502A, a second film bag concentrate port 502B provided on an end surface of the wound film bag 510 near the second end 220, the second film bag concentrate port 502B communicating to the second concentrate port 203B. The central tube 400 may allow raw water to enter the central tube 400 from the first water inlet end 401 and the second water inlet end 402, and the filtered concentrated water may be discharged from the first concentrated water inlet 203A near the first end 210 or the second concentrated water inlet 203B near the second end 220.

Therefore, the second raw water inlet 201B and the second concentrated water inlet 203B are arranged at the second end 220 of the filter bottle 200, so that the raw water inlet amount and the concentrated water outlet amount of the filter element assembly 100 'can be improved, and the filtering capacity of the filter element assembly 100' can be effectively improved due to the improvement of the water inlet amount.

Illustratively, the filter bottle 200 further includes a second cartridge end cap 900 positioned within the bottle body 600, the second cartridge end cap 900 being connected between an end of the bottle body 600 and an end of the wound membrane bag 510 at the second end 220. On the second cartridge end cap 900, a through hole may be provided to enable the second water inlet end 402 of the center tube 400 to pass through, the center tube 400 passes through the second cartridge end cap 900 to be internally connected to the second end 220 of the flask 600, and the second raw water port 201B and the second concentrate port 203B are located at the second end 220 of the flask 600. A second concentrate water flow channel 207 is formed between the center tube 400 and the second cartridge end cap 900 and communicates with a second concentrate port 203B and a second membrane bag concentrate port 502B.

The second raw water port 201B is communicated with the central tube 400, and raw water can enter the central tube 400 from the first raw water port 201A and can also enter the central tube 400 from the second raw water port 201B. The second concentrate port 203B communicates with a second film bag concentrate port 502B provided near the second end 220 of the wound film bag 510. As shown by the arrows in fig. 4, the concentrate discharged from the film bag 500 may be discharged from either the first film bag concentrate port 502A or the second film bag concentrate port 502B.

Therefore, the arrangement is that the raw water inlet of the filter element assembly 100 'is increased, the concentrated water outlet of the filter element assembly 100' is also increased, the water flow circulation capacity of the filter element assembly 100 'is improved, and the filtering capacity of the filter element assembly 100' is improved.

Illustratively, at the second end 220 of the filter assembly 100', the vial 600 includes a fourth annular wall 601 and a fifth annular wall 602 extending inwardly of the vial 600 from the end face of the vial 600. A fifth annular wall 602 is located at the periphery of the fourth annular wall 601, the fourth annular wall 601 is connected to the second inlet end 402 of the centertube 400, and the fifth annular wall 602 is connected to the second cartridge endcap 900.

A second concentrate water flow channel 207 is formed by the encircling of the fourth annular wall 601, the fifth annular wall 602, the central tube 400 and the second filter element end cap 900, and the second concentrate water flow channel 207 is communicated with the second concentrate inlet 203B and the second membrane bag concentrate inlet 502B.

Similarly, in order to prevent water leakage, the connection may be a sealing connection, and the sealing connection may be implemented by disposing a sealing element between two components, so as to achieve a sealing effect through the sealing element, where the sealing element may be a sealing ring, a sealing gasket, or the like. The sealing connection can also be realized by the matching relation between the components to achieve the sealing effect. Such sealing methods are well known to those skilled in the art and will not be described in detail.

Therefore, the bottle body 600 and the second filter element end cap 900 with the structure can form the second concentrated water flow channel 207, thereby simplifying the internal structures of the bottle body 600 and the second filter element end cap 900 and improving the integration of the filter element assembly 100'.

According to another aspect of the present invention, there is also provided a water purifier, comprising any one of the filter element assemblies 100, 100' as described above.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front", "rear", "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal" and "top", "bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one or more components or features shown in the figures to other components or features. It is to be understood that the spatially relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations of the component in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. A filter element assembly, comprising:

a filter flask (200) comprising a raw water port (201), a pure water port (202) and a concentrate water port (203); and

a filter element (300) disposed in the filter flask, the filter element comprising a central tube (400) and a membrane bag (500) wound around the central tube, the side wall of the central tube being provided with a plurality of through holes (410), the membrane bag comprising a membrane bag raw water port (501) and a membrane bag concentrate port (502), the inner side wall of the filter flask and the outer side wall of the filter element being spaced apart to form a pure water zone (204) therebetween,

the central pipe is communicated with the original water gap, the through holes of the central pipe are communicated with the original water gap of the membrane bag, the pure water area is communicated with the pure water gap, and the membrane bag concentrated water gap is communicated with the concentrated water gap.

2. The filter element assembly according to claim 1, wherein the raw water port (201) comprises a first raw water port (201A), the concentrate port (203) comprises a first concentrate port (203A), the filter flask (200) has opposite first (210) and second (220) ends, the first raw, first concentrate and pure water ports (202) are provided at the first end, the end of the central tube (400) near the first end is a first water inlet end (401) which is connected to the first raw water port, the membrane bag concentrate port (502) comprises a first membrane bag concentrate port (502A) which is provided on the end face of a wound membrane bag (510) near the first end, which is connected to the first concentrate port.

3. The filter cartridge assembly of claim 2, wherein the filter bottle (200) comprises a bottle body (600), a water flow separation cap (700), and a first filter cartridge end cap (800),

the water flow separation cap is connected to the bottle body at the first end (210), the first water inlet end (401) of the central tube (400) is connected to the water flow separation cap through the first cartridge end cap, one end of the first cartridge end cap is connected to the water flow separation cap, the other end of the first cartridge end cap is connected to the end of the wound membrane pouch (510) near the first end,

a first concentrate water flow channel (206) communicating the first membrane bag concentrate port (502A) and the first concentrate port (203A) is formed between the center tube and the first cartridge end cap, and a pure water flow channel (205) communicating the pure water zone (204) and the pure water port (202) is formed between the first cartridge end cap and the bottle body.

4. The filter element assembly according to claim 3, wherein the water flow dividing cap (700) comprises a first annular wall (701), a second annular wall (702) and a third annular wall (703) about the axis of the filter flask (200), wherein the second annular wall is located at the periphery of the first annular wall and the third annular wall is located at the periphery of the second annular wall, the first annular wall being connected to the first water inlet end (401) of the central tube (400), the second annular wall being connected to the first filter element end cap (800), and the third annular wall being connected to the filter flask.

5. The filter element assembly according to claim 3, wherein the raw water port (201) further comprises a second raw water port (201B) provided at the second end (220), the concentrate port (203) further comprises a second concentrate port (203B) provided at the second end, the end of the central tube (400) near the second end is a second water inlet port (402) connected to the second raw water port, the membrane bag concentrate port (502) further comprises a second membrane bag concentrate port (502B) provided on the end face of the wound membrane bag (510) near the second end, the second membrane bag concentrate port connected to the second concentrate port;

the filter bottle (200) further includes a second cartridge end cap (900) located within the bottle body (600),

the second cartridge end cap being connected between an end of the bottle and an end of the wound membrane bag (510) at the second end (220), the center tube (400) being connected to the end of the bottle through the second cartridge end cap, and the second raw water port (201B) and the second concentrate port (203B) being located at the end of the bottle,

a second concentrate water flow channel (207) communicating the second concentrate port (203B) and the second membrane bag concentrate port (502B) is formed between the center tube and the second cartridge end cap.

6. The filter cartridge assembly of claim 5, wherein at the second end (220), the body (600) comprises a fourth annular wall (601) and a fifth annular wall (602) extending inwardly from the end face of the body into the body, the fifth annular wall being located at a periphery of the fourth annular wall, the fourth annular wall being connected to the second inlet end (402) of the center tube, the fifth annular wall being connected to the second cartridge end cap (900).

7. The filter element assembly according to claim 2, wherein the end of the central tube (400) close to the second end (220) is closed, wherein of the plurality of through holes (410) of the central tube, the through holes close to the first water inlet end (401) have a smaller diameter than the through holes close to the closed end.

8. The filter element assembly according to any of claims 2-4, wherein the raw water port (201) further comprises a second raw water port (201B) arranged at the second end (220), the concentrate port (203) further comprises a second concentrate port (203B) arranged at the second end, the end of the central tube (400) near the second end is a second water inlet end (402) which is connected to the second raw water port, the membrane bag concentrate port (502) further comprises a second membrane bag concentrate port (502B) arranged on the end surface of the wound membrane bag (510) near the second end which is connected to the second concentrate port.

9. A water purification machine comprising a filter element assembly according to any one of claims 1 to 8.

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