CN112479409A

CN112479409A - Reverse osmosis composite filter element

Info

Publication number: CN112479409A
Application number: CN202011508762.4A
Authority: CN
Inventors: 杨华; 周栋; 张涛; 龚圆杰; 何海; 范婷; 赵保文
Original assignee: Shanghai Chunmi Electronics Technology Co Ltd
Current assignee: Shanghai Chunmi Electronics Technology Co Ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-03-12
Anticipated expiration: 2040-12-18
Also published as: CN112479409B

Abstract

The present disclosure relates to a reverse osmosis composite filter element, which comprises: the filter flask body is provided with a water inlet, a pure water inlet and a waste water inlet; the front filter element assembly comprises a front upper end cover, a front lower end cover and a front filter material, and the front filter material is used for filtering water to be purified entering from the water inlet to generate purified water; the reverse osmosis RO filter element assembly comprises an RO membrane support and an RO membrane element fixed in the RO membrane support, the RO membrane element is of a spiral ring type structure, an RO membrane central tube is located in an inner ring hollow area of the RO membrane element, the upper end opening and the lower end of the RO membrane central tube are closed, and a first pure water through hole is formed in the side wall of the RO membrane central tube; the water inlet side of the RO membrane element is communicated with the water outlet side of the inner ring of the front filter material, the wastewater side of the RO membrane element is communicated with the wastewater port, and the upper end opening of the RO membrane central tube is communicated with the pure water port. This technical scheme can solve the problem of leading filter media such as leading active carbon that does not have spatial arrangement behind the increase water drive jar in leading filter core.

Description

Reverse osmosis composite filter element

Technical Field

The disclosure relates to the technical field of water purification, in particular to a reverse osmosis composite filter element.

Background

Along with the improvement of living standard of people, people pay more and more attention to water quality sanitation, and a trend of equipping a water purifier for families is formed; if the water purifier is not used for a long time, ions in front of an RO (Reverse Osmosis) membrane in an RO (Reverse Osmosis) filter element in the water purifier penetrate through the RO membrane to permeate to a pure water end, so that TDS (Total dissolved solids) of first cup water is high, and user experience is influenced.

In order to solve the above problems, in the prior art, a water tank or a water drive tank may be provided in a structure such as a pre-filter element of a water purifier to implement a pure water bubble membrane technology, but the water drive tank is provided in the pre-filter element, which may result in no filter material such as spatially arranged pre-carbon.

Disclosure of Invention

In order to overcome the problems in the related art, the embodiment of the disclosure provides a reverse osmosis composite filter element. The technical scheme is as follows:

according to an aspect of the embodiments of the present disclosure, there is provided a reverse osmosis composite filter element, including:

the filter flask body is provided with a water inlet, a pure water port and a waste water port;

the front filter element assembly is fixed in the filter bottle body and comprises a front upper end cover, a front lower end cover and a front filter material fixed between the front upper end cover and the front lower end cover, the front filter material is an annular cylinder, the outer ring water inlet side of the front filter material is communicated with the water inlet, and the front filter material is used for filtering water to be purified entering the water inlet to generate purified water;

the RO filter element assembly is fixed in the filter flask body and comprises an RO membrane support and an RO membrane element fixed in the RO membrane support, the RO membrane support comprises an RO membrane upper end cover, an RO membrane lower end cover and an RO membrane central tube, the RO membrane element is of a spiral ring type structure, the RO membrane central tube is located in an inner ring hollow area of the RO membrane element, the upper end opening lower end of the RO membrane central tube is closed, a first pure water through hole is formed in the side wall of the RO membrane central tube, and pure water on the pure water side of the RO membrane element enters the RO membrane central tube through the first pure water through hole; the water inlet side of the RO membrane element is communicated with the water outlet side of the inner ring of the front filter material and used for filtering purified water generated by the front filter material to generate purified water and waste water, the waste water side of the RO membrane element is communicated with the waste water port, and the upper end opening of the RO membrane central tube is communicated with the purified water port.

In one embodiment, the front upper end cover and the front lower end cover are both annular cover bodies;

the RO membrane upper end cover is a tubular shell with two open ends, the preposed filter element assembly is positioned in the RO membrane upper end cover, the preposed lower end cover is connected with the RO membrane upper end cover, a first cavity between the RO membrane upper end cover and the outer side of the preposed filter element assembly is communicated with the water inlet and the outer ring water inlet side of the preposed filter material, and the lower end of the RO membrane upper end cover is connected with the RO membrane element;

the RO membrane central pipe penetrates through the hollow area of the inner ring of the preposed filter material and is communicated with the pure water port, and the first pure water through hole is positioned in the area, surrounded by the RO membrane element, on the RO membrane central pipe; the second cavity between the RO membrane central tube and the inner side of the front filter element assembly is communicated with the water inlet side of the RO membrane element through the lower end opening of the RO membrane upper end cover;

the RO membrane lower end cover is a plate-shaped cover body provided with a wastewater outlet, and is positioned at the wastewater side of the RO membrane element, and the wastewater outlet is communicated with the wastewater outlet through a third cavity between the RO filter element assembly and the filter bottle bodies.

In one embodiment, the reverse osmosis composite filter element further comprises:

the rear filter element assembly is fixed in the RO membrane central tube and comprises a rear filter material, the rear filter material is an annular cylinder, the inner ring hollow area of the rear filter material is communicated with the pure water port, and the rear filter material is right after pure water in the RO membrane central tube is filtered, the pure water is made to flow out of the inner ring hollow area of the rear filter material to the pure water port.

In one embodiment, the RO membrane central tube comprises a first central tube located in the inner annular hollow region of the RO membrane element and a second central tube located in the inner annular hollow region of the pre-filter, the second central tube having a diameter greater than the diameter of the first central tube;

the rear filter element assembly is positioned in the second central tube and comprises a rear lower end cover, the rear lower end cover is arranged above the first central tube, and the rear filter material is fixed between the rear lower end cover and the front upper end cover;

the pure water in the first central pipe flows to the outer ring water inlet side of the rear filter material through a gap between the first central pipe and the rear lower end cover, and a hollow area on the inner ring water outlet side of the rear filter material is communicated with the pure water port through an inner ring hollow area of the front upper end cover.

In one embodiment, a water blocking component is arranged at the wastewater outlet and used for preventing wastewater from flowing back; the water blocking component comprises a waste water check valve or an elastic water blocking component.

In one embodiment, the water inlet, the water purification port and the waste water port are located at the top end of the filter flask body;

or the water inlet and the pure water inlet are positioned at the top end of the filter flask body, and the waste water inlet is positioned at the bottom end of the filter flask body.

In one embodiment, the front upper end cover is an annular cover body, and the front lower end cover is a plate-type cover body;

the RO membrane lower end cover is a tubular shell with two open ends, the preposed filter element assembly is positioned in the RO membrane lower end cover, the preposed upper end cover and the preposed lower end cover are connected with the inner wall of the RO membrane lower end cover, one end of a fourth cavity between the RO filter element assembly and the filter bottle body is communicated with the water inlet, and the other end of the fourth cavity is communicated with the outer ring water inlet side of the preposed filter material through a through hole on the preposed lower end cover or a gap between the preposed lower end cover and the RO membrane lower end cover; the water outlet side of the inner ring of the preposed filter material is communicated with the water inlet side of the RO membrane element through the hollow area of the preposed upper end cover and the upper end opening of the RO membrane lower end cover;

the RO membrane upper end cover is an annular shell and is positioned on the wastewater side of the RO membrane element, and the inner ring hollow area of the RO membrane upper end cover is communicated with the wastewater opening.

In one embodiment, the RO membrane upper end cover is a tubular shell with two open ends, the upper end opening of the RO membrane upper end cover is communicated with the waste water port, and the lower end of the RO membrane upper end cover is connected with the RO membrane element; the reverse osmosis composite filter element further comprises:

the rear filter element assembly is positioned in the RO membrane upper end cover and comprises a rear upper end cover, a rear lower end cover and a water guide end cover, the water guide end cover is an annular shell with two open ends, the upper end of the water guide end cover is connected with the outer side wall of the rear upper end cover, and the lower end opening of the water guide end cover is communicated with the upper end opening of the RO membrane central tube; the rear lower end cover is an annular end cover and is positioned in the water guide end cover, and a fifth cavity between the rear lower end cover and the water guide end cover is communicated with a lower end opening of the water guide end cover and the outer ring water inlet side of the rear filter material; the rear upper end cover is an annular end cover, and an inner ring hollow area of the rear upper end cover is communicated with the pure water port; the post-positioned filter element assembly is communicated with a sixth cavity between the RO membrane upper end cover and the wastewater side and the wastewater port.

In one embodiment, the filter flask body is further provided with a tap water port, and the reverse osmosis composite filter element further comprises: a water drive tank assembly;

the water drive tank assembly is fixed in the filter flask body and comprises a water drive tank shell and a water drive tank water bag positioned in the water drive tank shell, the water drive tank water bag is used for dividing the space in the water drive tank shell into a tap water cavity and a pure water cavity, the tap water cavity is communicated with the tap water inlet, and the pure water cavity is communicated with the pure water inlet and an upper end opening of the RO membrane central tube; the water drive tank is used for storing the pure water produced by the RO membrane element in the pure water cavity during water replenishing, and the tap water in the tap water cavity presses the pure water in the pure water cavity to be discharged from the pure water port during water discharging;

and a pure water check valve is arranged in the RO membrane central pipe or the pure water cavity of the water drive tank and used for limiting pure water to flow from the RO membrane central pipe to the pure water cavity.

In one embodiment, the water drive tank shell is an annular shell with two open ends, the lower end opening of the water drive tank shell is communicated with the upper end opening of the RO membrane central pipe, and the upper end opening of the water drive tank shell is communicated with the pure water port;

one end of the water-drive tank water bag is open, a cavity in the water-drive tank water bag is a tap water cavity, a cavity between the water-drive tank water bag and the water-drive tank shell is a pure water cavity, and the tap water cavity is communicated with the tap water port through the opening of the water-drive tank water bag;

the pure water check valve is arranged at the opening at the lower end of the water drive tank shell.

and the rear filter element assembly is positioned in the RO membrane central tube.

In one embodiment, the water drive tank shell is an annular shell with two open ends;

the water-drive tank water bag is an annular water bag with openings at two ends, the cavity in the water-drive tank water bag is a pure water cavity, the cavity between the water-drive tank water bag and the water-drive tank shell is a tap water cavity, and the tap water cavity is communicated with the tap water port through the opening at the upper end of the water-drive tank shell;

the water drive tank further comprises a water drive tank central tube, the water drive tank central tube is located in a water drive tank water bag, the water drive tank central tube is opened from top to bottom, the upper opening of the water drive tank central tube is communicated with the pure water port, the lower opening of the water drive tank central tube is communicated with the upper end opening of the RO membrane central tube, the water drive tank central tube penetrates through the upper opening and the lower opening of the water drive tank water bag and the lower end opening of the water drive tank shell, the pure water check valve is arranged at the bottom of the water drive tank central tube, and the water drive tank central tube is located on the side wall above the pure water check valve and is provided with a second pure water through hole.

a post-filter element assembly located within the RO membrane center tube and/or the water drive tank center tube 63.

or the waste water port and the pure water port are positioned at the top end of the filter flask body, and the water inlet is positioned at the bottom end of the filter flask body.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

this embodiment can be with owing to increase leading filter media such as leading activated carbon of no spatial arrangement in the leading filter core behind the water drive jar and reverse osmosis filter core subassembly integration in a filter flask, form above-mentioned reverse osmosis composite filter core, solve the problem of no materials such as leading carbon of spatial arrangement, and do not increase the whole volume of water purifier, make things convenient for the installation of other household electrical appliances in the basin cabinet.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram illustrating a reverse osmosis composite filter element according to an exemplary embodiment.

Fig. 2 is a schematic diagram of a reverse osmosis composite filter element according to an exemplary embodiment.

Fig. 3 is a schematic diagram of a reverse osmosis composite filter element according to an exemplary embodiment.

Fig. 4 is a schematic diagram illustrating a reverse osmosis composite filter element according to an exemplary embodiment.

Fig. 5 is a schematic diagram illustrating a reverse osmosis composite filter element according to an exemplary embodiment.

Fig. 6 is a schematic diagram illustrating a reverse osmosis composite filter element according to an exemplary embodiment.

Fig. 7 is a schematic diagram of a reverse osmosis composite filter element according to an exemplary embodiment.

Fig. 8 is a schematic diagram illustrating a reverse osmosis composite filter element according to an exemplary embodiment.

Fig. 9 is a schematic diagram illustrating a reverse osmosis composite filter element according to an exemplary embodiment.

Fig. 10 is a schematic diagram illustrating a reverse osmosis composite filter element according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are used for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present disclosure provides a reverse osmosis composite filter element, and fig. 1 is a schematic structural view illustrating a reverse osmosis composite filter element according to an exemplary embodiment, and as shown in fig. 1, the reverse osmosis composite filter element includes a filter body 11, and a pre-filter element assembly and an RO filter element assembly fixed in the filter body 11.

As shown in fig. 1, the filter bottle 11 may be provided with a water inlet 111, a pure water port 112 and a waste water port 113, where the water inlet 111 is an inlet of water to be purified which needs to be purified by the reverse osmosis composite filter element, the pure water port 112 is an outlet of pure water which is produced after being purified by the pre-filter element assembly and the RO filter element assembly in the reverse osmosis composite filter element, and the waste water port 113 is an outlet of waste water which is produced after being purified by the pre-filter element assembly and the RO filter element assembly in the reverse osmosis composite filter element.

As shown in fig. 1, the pre-filter element assembly includes a pre-upper end cap 21, a pre-lower end cap 22, and a pre-filter 23 fixed between the pre-upper end cap 21 and the pre-lower end cap 22, where the pre-filter 23 is an annular cylinder, an outer ring water inlet side of the pre-filter 23 is communicated with the water inlet 111, and the pre-filter 23 is used for filtering water to be purified entering the water inlet 111 to generate purified water; here, the pre-filter 23 includes one or more of various filter materials such as activated carbon, PP cotton, folded paper PP, non-woven fabric, ultra-filtration membrane, micro-filtration membrane, and scale inhibitor, and the pre-filter 23 is mainly used for pre-treating the inlet water of the RO filter element assembly, thereby prolonging the service life of the RO filter element assembly. The outer ring water inlet side of the pre-filter 23 is the outer ring side of the pre-filter 23, and the inner ring water outlet side of the pre-filter 23 is the inner ring side of the pre-filter 23.

As shown in fig. 1, the RO filter element assembly comprises an RO membrane holder and an RO membrane element 31 fixed in the RO membrane holder, the RO membrane holder comprises an RO membrane upper end cap 32, an RO membrane lower end cap 33 and an RO membrane central tube 34, the RO membrane element 31 is of a spiral-coil structure, the RO membrane element 31 comprises a water inlet side, a pure water side and a wastewater side, the wastewater generated after filtering purified water entering from the water inlet side by the RO membrane element 31 is positioned on the wastewater side, the generated pure water is positioned on the pure water side, and the pure water side of the RO membrane element 31 is the inner ring side of the RO membrane element 31. The RO membrane central tube 34 is located in the inner ring hollow area of the RO membrane element 31, the upper end of the RO membrane central tube 34 is open, the lower end is closed, the side wall of the RO membrane central tube 34 is provided with a first pure water through hole 341, and pure water on the pure water side of the RO membrane element 31 enters the RO membrane central tube 34 through the first pure water through hole 341; the water inlet side of the RO membrane element 31 is communicated with the water outlet side of the pre-filter 23 and is used for filtering purified water generated by the pre-filter 23 to generate purified water and wastewater, the wastewater side of the RO membrane element 31 is communicated with the wastewater outlet 113, and the upper end opening of the RO membrane central tube 34 is communicated with the purified water outlet 112.

Here, this reverse osmosis composite filter's water inlet 111 can be connected after having the leading filter core of water drive jar, and this leading filter core is owing to increase water drive jar, can not have filter media such as spatial arrangement active carbon, and this application can be integrated in this reverse osmosis composite filter with this leading filter media 23 that includes active carbon, solves the problem of the leading materials such as no spatial arrangement, does not also increase the whole volume of water purifier simultaneously, makes things convenient for the installation of other household electrical appliances in the basin cabinet.

Here, the water to be purified flowing out of the pre-filter element enters the filter flask body of the reverse osmosis composite filter element from the water inlet 111, and then is filtered by the pre-filter 23 of the filter flask body and the RO membrane element 31, the produced pure water flows out from the pure water port 112, and the produced waste water flows out from the waste water port 113. The specific filtering process can be as follows: the water to be purified flows from the water inlet 111 to the outer ring water inlet side of the pre-filter 23, and after being filtered by the pre-filter 23, the produced purified water flows out from the inner ring water outlet side of the pre-filter 23. The purified water can flow to the water inlet side of the RO membrane element 31 communicating with the inner ring water outlet side of the pre-filter 23, and is filtered by the RO membrane element 31, and under a certain pressure, water molecules can pass through the RO membrane element 31, while impurities such as inorganic salts, heavy metal ions, organic matters, colloids, bacteria, viruses, and the like in the purified water cannot pass through the RO membrane element 31, so that pure water that can pass through the RO membrane element 31 and wastewater that cannot pass through the RO membrane element 31 are strictly separated, and both sides of the RO membrane element 31 can be divided into a pure water side and a wastewater side, and concentrated water cannot pass through the RO membrane element 31, and only flows out from the wastewater side of the RO membrane element 31 to the wastewater port 113 communicating with the wastewater side. Pure water can permeate the RO membrane elements 31 to the pure water side, then enter the RO membrane center tube 34 from the first pure water through-holes 341 in the RO membrane center tube 34, and then flow out from the upper end opening of the RO membrane center tube 34 to the pure water port 112.

Here, the structure of the pre-filter element assembly and the RO filter element assembly in the filter flask body of the reverse osmosis composite filter element is various, in some embodiments, a post-filter element assembly can be further arranged in the filter flask body 11, the post-filter element assembly can be positioned in the RO membrane central tube 34, and in some embodiments, a water drive tank can be further arranged in the filter flask body 11. These structures are described in detail below.

In a possible embodiment, as shown in fig. 1, the front upper end cover 21 and the front lower end cover 22 are both annular cover bodies, the front filter 23 in the shape of an annular cylinder is located between the front upper end cover 21 and the front lower end cover 22, and the inner ring hollow area of the front filter 23 communicates with the inner ring hollow areas of the front upper end cover 21 and the front lower end cover 22.

As shown in fig. 1, the RO membrane upper end cap 32 is a tubular shell with two open ends, the pre-filter element assembly is located in the RO membrane upper end cap 32, the pre-lower end cap 22 is connected to the RO membrane upper end cap 32, the RO membrane upper end cap 32 is communicated with the first cavity 41 between the outer sides of the pre-filter element assembly through the water inlet 111 and the outer ring water inlet side of the pre-filter element 23, so that the outer ring water inlet side of the pre-filter element 23 can be communicated with the water inlet 111 through the first cavity 41, so that the water to be purified entering the water inlet 111 enters the pre-filter element 23 from the first cavity 41 and is purified by the pre-filter element 23 to generate purified water.

The lower end of the RO membrane upper end cap 32 is connected to the RO membrane element 31, the RO membrane central tube 34 passes through the hollow region of the pre-filter 23 and communicates with the purified water port 112, and the first purified water through hole 341 is located in the region of the RO membrane central tube 34 surrounded by the RO membrane element 31; the second cavity 42 between the RO membrane central tube 34 and the inner side of the pre-filter assembly is connected to the water inlet side of the RO membrane element 31 through the lower opening of the RO membrane upper end cap 32, so that the water outlet side of the inner ring of the pre-filter 23 is connected to the water inlet side of the RO membrane element 31, the purified water generated by the filtering of the pre-filter 23 can flow to the RO membrane element 31 through the second cavity 42, and is further filtered by the RO membrane element 31, and the purified water generated by the RO membrane element 31 can flow to the pure water port 112 directly from the upper opening of the RO membrane central tube 34 after entering the RO membrane central tube 34 from the first pure water through hole 341 on the RO membrane central tube 34.

The RO membrane lower end cap 33 is a plate-shaped cap body provided with a wastewater outlet 331, and is located on the wastewater side of the RO membrane element 31, the wastewater outlet 331 is communicated with the wastewater outlet 113 through the third cavity 43 between the RO filter element assembly and the filter flask body, so that wastewater generated by the RO membrane element 31 can flow to the wastewater outlet 113 through the wastewater outlet 331 and the third cavity 43 and be discharged.

In one possible embodiment, fig. 2 is a schematic diagram of a reverse osmosis composite filter element according to an exemplary embodiment. As shown in fig. 2, the reverse osmosis composite filter element further comprises: and the post-filter element component is fixed in the RO membrane central pipe 34.

Here, the post filter assembly may include only the post filter 51, and the post filter 51 may be fixed in the RO membrane central tube 34 by the closed end of the RO membrane central tube 34 and the inner wall of the pure water port 112 of the filter cylinder. The pure water in the RO membrane central tube 34 can enter the post filter 51 from the outer ring side of the post filter 51, be filtered by the post filter 51, flow out from the inner ring hollow region of the post filter 51, and flow to the pure water port 112 through the upper end opening of the RO membrane central tube 34.

Here, in some embodiments, as shown in fig. 2, the post-filter assembly may also be provided with a post-upper end cap 52 and a post-lower end cap 53 to fix the post-filter 51, wherein, as shown in fig. 2, the post-upper end cap 52 may be the annular cap body, and the post-lower end cap 53 may be a plate-shaped cap body, so that pure water in the RO membrane central tube 34 flows out from the inner ring hollow area of the post-filter 51 after being filtered by the post-filter 51, and may flow to the pure water port 112 through the inner ring hollow area of the post-upper end cap 52 and the upper end opening of the RO membrane central tube 34.

Here, the post filter 51 includes, but is not limited to, at least one of the following filters: the activated carbon, PP cotton, folded paper PP, ultrafiltration membrane, microfiltration membrane, mineralizer and the like are used for further filtering the flowing pure water, filtering out particle impurities in the water, and improving the taste of the pure water, inhibiting bacteria and resisting bacteria and intercepting microorganisms.

In one possible embodiment, fig. 3 is a schematic diagram of a reverse osmosis composite filter element according to an exemplary embodiment. As shown in fig. 3, the RO membrane central tube 34 comprises a first central tube 342 positioned in the inner annular hollow region of the RO membrane element 31 and a second central tube 343 positioned in the inner annular hollow region of the pre-filter 23, the second central tube 343 having a diameter larger than that of the first central tube 342, and the post-filter assembly positioned in the second central tube 343.

Here, the first pure water through hole 341 is located in the first central tube 342, the first central tube 342 and the second central tube 343 may be integrally manufactured, or may be hermetically connected as shown in fig. 3, and the rear filter element assembly is located in the second central tube 343 with a larger cross section, so as to facilitate the installation of the rear filter element 51. When the rear filter element assembly is located in the second central tube 343, a rear lower end cap 53 may be provided for fixing the rear filter 51, the rear lower end cap 53 is disposed above the first central tube 342, and the rear filter 51 is fixed between the rear lower end cap 53 and the front upper end cap 21; pure water in the first central tube 342 can flow to the outer ring water inlet side of the rear filter material 51 through a gap between the first central tube 342 and the rear lower end cover 53, and a hollow area on the inner ring water outlet side of the rear filter material 51 is communicated with the pure water port 112 through an inner ring hollow area of the front upper end cover 21. Thus, the pure water produced in the RO membrane element 31 can be filtered by the post-filter medium 51 and then flow out from the pure water port 112 to be used by the user.

In a possible embodiment, as shown in fig. 2 or fig. 3, a water blocking component 332 is disposed at the wastewater outlet 331, and the water blocking component 332 is used for blocking the backflow of wastewater, so that wastewater generated by the RO membrane only flows out from the wastewater outlet 331 but not flows back, and wastewater generated by the RO membrane element 31 is prevented from flowing back to the membrane of the RO membrane element 31 and passing through the RO membrane to permeate to the pure water end. For example, the water blocking component 332 may be a waste water check valve or other elastic water blocking component having the function of the check valve.

In one possible embodiment, as shown in fig. 1 to 3, the water inlet 111, the purified water outlet 112 and the waste water outlet 113 are located at the top end of the filter flask body, so that the reverse osmosis composite filter element can be conveniently mounted or dismounted in the water purifier.

Alternatively, fig. 4 is a schematic diagram illustrating a reverse osmosis composite filter element according to an exemplary embodiment. As shown in fig. 4, on the basis of the reverse osmosis composite filter element shown in fig. 3, the water inlet 111 and the pure water outlet 112 are located at the top end of the filter flask body, and the waste water outlet 113 is located at the bottom end of the filter flask body, so that water inlet and outlet at two ends of the reverse osmosis composite filter element can be realized.

Of course, in the reverse osmosis composite filter element shown in fig. 1 and 2, the water inlet 111 and the pure water port 112 may be located at the top end of the filter flask body, and the waste water port 113 is located at the bottom end of the filter flask body, which is not shown herein with reference to fig. 1 and 2.

In one possible embodiment, fig. 5 is a schematic diagram of a reverse osmosis composite filter element according to an exemplary embodiment.

As shown in fig. 5, the front upper end cover 21 is an annular cover, and the front lower end cover 22 is a plate-shaped cover; the RO membrane lower end cover 33 is a tubular shell with two open ends, the preposed filter element assembly is positioned in the RO membrane lower end cover 33, the preposed upper end cover 21 and the preposed lower end cover 22 are connected with the inner wall of the RO membrane lower end cover 33, one end of a fourth cavity 44 between the RO filter element assembly and the filter bottle body 11 is communicated with the water inlet 111, and the other end of the fourth cavity 44 is communicated with the outer ring water inlet side of the preposed filter material 23 through a through hole on the preposed lower end cover 22 or a gap between the preposed lower end cover 22 and the RO membrane lower end cover 33; the water outlet side of the inner ring of the preposed filter material 23 is communicated with the water inlet side of the RO membrane element 31 through the hollow area of the preposed upper end cover 21 and the upper end opening of the RO membrane lower end cover 33; the RO membrane upper end cap 32 is an annular housing and is located on the waste water side of the RO membrane element 31, and the hollow region of the inner ring of the RO membrane upper end cap 32 communicates with the waste water port 113.

Thus, the water inlet side of the outer ring of the pre-filter 23 can be communicated with the water inlet 111 through the fourth cavity 44, so that the water to be purified, which enters from the water inlet 111, enters the pre-filter 23 from the fourth cavity 44, is purified by the pre-filter 23 to produce purified water, passes through the hollow area of the pre-upper end cap 21 and the upper end opening of the RO membrane lower end cap 33 from the water outlet side of the inner ring of the pre-filter 23, enters the water inlet side of the RO membrane element 31, and after the RO membrane element 31 filters the purified water, the produced purified water enters the RO membrane central tube 34 through the first purified water through hole 341 and flows from the upper end opening of the RO membrane central tube 34 to the purified water port 112; the wastewater on the wastewater side flows directly through the hollow region of the inner ring of the RO membrane upper end cap 32 to the wastewater port 113 to be discharged.

In one possible embodiment, fig. 6 is a schematic diagram of a reverse osmosis composite filter element according to an exemplary embodiment.

As shown in fig. 6, the RO membrane upper end cap 32 is a tubular shell with two open ends, the upper end opening of the RO membrane upper end cap 32 is communicated with the waste water port 113, and the lower end of the RO membrane upper end cap 32 is connected with the RO membrane element 31; the reverse osmosis composite filter element further comprises: the post-positioned filter element component. The rear filter element assembly is positioned in the RO membrane upper end cover 32 and comprises a rear filter element shell and a rear filter material 51 positioned in the rear filter element shell, the rear filter element shell comprises a rear upper end cover 52, a rear lower end cover 53 and a water guide end cover 54, the water guide end cover 54 is an annular shell with two open ends, the upper end of the water guide end cover 54 is connected with the outer side wall of the rear upper end cover 52, and the lower end opening of the water guide end cover 54 is communicated with the upper end opening of the RO membrane central tube 34; the rear lower end cover 53 is an annular end cover and is positioned in the water guide end cover 54, and a fifth cavity 45 between the rear lower end cover 53 and the water guide end cover 54 is communicated with a lower end opening of the water guide end cover 54 and an outer ring water inlet side of the rear filter material 51; the rear upper end cover 52 is an annular end cover, and an inner ring hollow area of the rear upper end cover 52 is communicated with the pure water port 112; the sixth cavity 46 between the post-filter element assembly and the RO membrane upper end cap 32 communicates the wastewater side with the wastewater port 113.

Thus, pure water generated in the RO membrane element 31 enters the RO membrane center tube 34 through pure water emptying, and pure water in the RO membrane center tube 34 can enter the rear filter element housing from the lower end opening of the water guide end cap 54, flow to the outer ring water inlet side of the rear filter element 51 through the fifth cavity 45 between the rear lower end cap 53 and the water guide end cap 54, be filtered by the rear filter element 51, flow out from the inner ring hollow area of the rear filter element 51, and flow to the pure water port 112 through the inner ring hollow area of the rear upper end cap 52. Pure water produced by the RO membrane element 31 can flow through the sixth chamber 46 to the waste water port 113 to be discharged.

Of course, in other embodiments, the post-filter cartridge assembly may also be located in the RO membrane center tube 34, and referring to fig. 2, the post-filter cartridge located in the RO membrane center tube 34 shown in fig. 2 is placed in the RO membrane center tube 34 shown in fig. 5, which is not shown.

In one possible embodiment, fig. 7 is a schematic diagram of a reverse osmosis composite filter element according to an exemplary embodiment. As shown in fig. 7, the filter flask body is further provided with a tap water inlet 114, and the reverse osmosis composite filter element further comprises: a water drive tank assembly;

the water drive tank assembly is fixed in the filter flask body 11 and comprises a water drive tank body 61 and a water drive tank water bag 62 positioned in the water drive tank body 61, for example, as shown in fig. 7, the water drive tank assembly can be positioned in the RO membrane upper end cap 32, however, in other embodiments, the water drive tank can be positioned outside the RO membrane upper end cap 32 without limitation, when the water drive tank assembly can be positioned in the RO membrane upper end cap 32, a cavity between the water drive tank assembly and the RO membrane upper end cap 32 is communicated with the waste water port 113 and the waste water side of the RO membrane element 31, so that waste water generated on the waste water side of the RO membrane element 31 can flow to the waste water port 113 through the cavity to be discharged. The water-drive tank water bag 62 is used for dividing the space inside the water-drive tank shell 61 into a tap water cavity and a pure water cavity, and the water-drive tank water bag 62 can divide the inside of the water-drive tank shell 61 into a cavity inside the water-drive tank water bag 62 and a cavity outside the water-drive tank water bag 62; here, the cavity in the water-drive tank water bag 62 may be a tap water cavity, the cavity between the water-drive tank water bag 62 and the water-drive tank case 61 may be a pure water cavity, or the cavity in the water-drive tank water bag 62 may be a pure water cavity, and the cavity between the water-drive tank water bag 62 and the water-drive tank case 61 may be a tap water cavity, which is not limited herein. The tap water cavity is communicated with the tap water port 114, and the pure water cavity is communicated with the pure water port 112 and the upper end opening of the RO membrane central tube 34; the water drive tank is used for storing the pure water produced by the RO membrane element 31 in the pure water cavity during water replenishing, and the tap water in the tap water cavity presses the pure water in the pure water cavity to be discharged from the pure water port 112 during water discharging; a pure water check valve is disposed in the RO membrane central tube 34 or the pure water chamber of the water drive tank, and for example, as shown in fig. 7, a pure water check valve 611 is disposed in the pure water chamber of the water drive tank, and the pure water check valve 611 is used to limit the flow of pure water from the RO membrane central tube 34 to the pure water chamber.

Here, the tap water chamber in the water drive tank is used for containing tap water, and tap water enters and exits the tap water chamber of the water drive tank through the tap water port 114. When the water drive tank needs to store pure water, the pure water produced by the RO membrane element 31 flows from the RO membrane central tube 34 to the pure water cavity for storage, the pure water in the pure water cavity extrudes tap water in the tap water cavity, and the tap water in the tap water cavity is discharged out of the water drive tank until the pure water cavity is filled with the pure water; when pure water is discharged from the pure water chamber, tap water enters the tap water chamber of the water drive tank, and pure water in the pure water chamber is squeezed and flows out from the pure water port 112.

This embodiment can be integrated the above-mentioned composite filter element of formation together with water drive jar structure and RO filter core, leading filter core, reduces the whole volume of water purifier, sets up the problem that water drive jar increases the volume alone when solving water purifier pure water bubble membrane and water demand, reduces the occupation space of water purifier in the basin cabinet, makes things convenient for the installation of other household electrical appliances in the basin cabinet.

In a possible embodiment, as shown in fig. 7, the water drive tank shell 61 is an annular shell with two open ends, the lower end opening of the water drive tank shell 61 is communicated with the upper end opening of the RO membrane central tube 34, and the upper end opening of the water drive tank shell 61 is communicated with the purified water port 112; one end of the water-driving tank water bag 62 is open, a cavity in the water-driving tank water bag 62 is a tap water cavity, a cavity between the water-driving tank water bag 62 and the water-driving tank shell 61 is a pure water cavity, and the tap water cavity is communicated with the tap water port 114 through the opening of the water-driving tank water bag 62; the pure water check valve 611 is disposed at the lower end opening of the water drive tank case 61.

At this time, after the pure water produced by the RO membrane element 31 enters the RO membrane center tube 34, the pure water can enter the pure water chamber between the RO membrane center tube 34 and the water drive tank shell 61 and the water drive tank water bag 62 through the lower end opening of the water drive tank shell 61 for storage. When the water-driven tank stores pure water, the pure water in the pure water cavity extrudes tap water in the water-driven tank water bag 62, and the tap water in the water-driven tank water bag 62 is discharged until the pure water cavity is filled with the pure water; when pure water is discharged from the pure water chamber, tap water enters the water-driving tank water bag 62, and the water-driving tank water bag 62 is opened to squeeze pure water in the pure water chamber, so that pure water flows out from the pure water port 112.

The water drive tank water bag 62 that this embodiment provided only needs to set up an opening and connects pure water mouth 112, and structural sealing connection changes the realization, and the product yields is high and with low costs.

Optionally, in a possible embodiment, the reverse osmosis composite filter element further includes: a post-filter assembly, which may be located within the RO membrane center tube 34. Referring to fig. 7, a post-cartridge module is provided within the RO membrane center tube 34 of the reverse osmosis composite cartridge of fig. 7. Thus, the pure water produced by the RO membrane element 31 flows into the RO membrane central tube 34 through the first pure water through hole 341, and then enters the post-filter element assembly through the guide space formed by the gap between the RO membrane central tube 34 and the post-filter element assembly for further filtration, and then flows into the water drive tank 62.

In one possible embodiment, fig. 8 is a schematic diagram of a composite filter element according to an exemplary embodiment. As shown in fig. 8, the water drive tank shell 61 is an annular shell with two open ends; the water-drive tank water bag 62 is an annular water bag with openings at two ends, a cavity in the water-drive tank water bag 62 is a pure water cavity, a cavity between the water-drive tank water bag 62 and the water-drive tank shell 61 is a tap water cavity, and the tap water cavity is communicated with the tap water port 114 through an opening at the upper end of the water-drive tank shell 61; the water drive tank further comprises a water drive tank center pipe 63, the water drive tank center pipe 63 is located in the water drive tank water bag 62, the upper opening and the lower opening of the water drive tank center pipe 63, the upper opening of the water drive tank center pipe 63 communicates with the pure water port 112, the lower opening of the water drive tank center pipe 63 communicates with the upper end opening of the RO membrane center pipe 34, the water drive tank center pipe 63 passes through the upper opening and the lower end opening of the water drive tank water bag 62 and the water drive tank shell 61, the pure water check valve 611 is arranged at the bottom of the water drive tank center pipe 63, the water drive tank center pipe 63 is located the side wall above the pure water check valve 611 is provided with a second pure water through hole 631.

At this time, after the pure water produced by the RO membrane element 31 enters the RO membrane center tube 34, the pure water can enter the water drive tank center tube 63 from the RO membrane center tube 34, and enter the pure water chamber in the water drive tank water bag 62 from the second pure water through hole 631 in the water drive tank center tube 63 for storage. When the water drive tank stores pure water, the pure water in the water drive tank water bag 62 extrudes tap water in the tap water cavity, and the tap water in the tap water cavity is discharged from the tap water port 114 until the water drive tank water bag 62 is filled with pure water; when pure water is discharged from the pure water chamber of the water-driven tank water bag 62, tap water enters the tap water chamber and presses the water-driven tank water bag 62, so that the pure water in the pure water chamber flows out from the pure water port 112.

Alternatively, in one possible embodiment, fig. 9 is a schematic structural view of a composite filter element according to an exemplary embodiment. As shown in fig. 9, the reverse osmosis composite filter element further comprises: a post cartridge module 7, the post cartridge module 7 may be disposed within the RO membrane center tube 3414 as shown in fig. 9. Here, it should be noted that fig. 9 is a rear filter element assembly disposed in the RO membrane center tube 34 of the reverse osmosis composite filter element shown in fig. 8.

As shown in fig. 9, the post-filter element assembly 7 is disposed in the RO membrane central tube 34, and pure water prepared by the RO membrane element 31 flows into the RO membrane central tube 34 through the first pure water through hole 341, then flows into the water-driving tank water bag 62 through the guide space formed by the gap between the RO membrane central tube 34 and the post-filter element assembly 7, and is treated by the post-filter element assembly.

Alternatively, and in the alternative, in one possible embodiment, fig. 10 is a schematic diagram of a composite filter element according to an exemplary embodiment. When the water drive tank includes a water drive tank center tube 63, as shown in fig. 10, the post-filter cartridge assembly 7 may also be disposed within the water drive tank center tube 63 as shown in fig. 10.

As shown in fig. 10, the post-filter element assembly 7 is arranged in the central tube of the water drive tank, pure water prepared by the RO membrane element 31 flows from the RO membrane central tube 34 to the water drive tank central tube 63, and enters the water drive tank central tube 63 through the pure water check valve, pure water in the water drive tank central tube 63 is processed by the post-filter element assembly 7 and then stored in the water drive tank water bag 62 through the second pure water through hole, and pure water flowing out of the water drive tank central tube 63 passes through the post-filter element assembly, so that the taste of the pure water can be improved.

Alternatively, and optionally, in one possible embodiment, where the water drive tank includes a water drive tank center tube 63 as shown in fig. 8, the post-filter cartridge assembly 7 is disposed within the RO membrane center tube 34 and within the water drive tank center tube 63. Referring to fig. 9 and 10, a post-filter cartridge assembly 7 is arranged in the RO membrane central tube 34 and the water drive tank central tube 63, and the illustration is not given.

It should be noted that the post-filter assembly 7 may include only the post-filter as shown in fig. 10, and the post-filter may be fixed by a structure on the RO membrane central tube 34 or the water drive tank central tube 63. Alternatively, the post-filter element assembly 7 may be provided with a post-upper end cap and a post-lower end cap to fix the post-filter as shown in fig. 9, wherein the post-upper end cap may be the annular cap body and the post-lower end cap may be a plate-shaped cap body as shown in fig. 9, so that pure water in the RO membrane central tube 34 is filtered by the post-filter and then flows out from the inner ring hollow area of the post-filter, and may flow to the water drive tank through the inner ring hollow area of the post-upper end cap and the upper end opening of the RO membrane central tube 34.

This embodiment can all integrate water drive jar structure and RO filter core, leading filter core, rearmounted filter core at the internal above-mentioned composite filter core of formation of a filter flask, further reduces the whole volume of water purifier, sets up the problem that water drive jar increased the volume alone when solving water purifier pure water bubble membrane and water demand, reduces the occupation space of water purifier in the basin cabinet, makes things convenient for the installation of other household electrical appliances in the basin cabinet.

In a possible embodiment, as shown in fig. 5 to 10, the water inlet 111, the pure water port 112 and the waste water port 113 are located at the top end of the filter flask body; alternatively, the water inlet 111 in fig. 5 to 10 may be arranged at the bottom end of the filter flask body 11, and the waste water port 113 and the purified water port 112 are still arranged at the top end of the filter flask body as shown in fig. 5 to 10. In some embodiments having a tap water port 114, as shown in fig. 7-10, the tap water port 114 is located at the top end of the filter bottle body 11.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure should be limited only by the attached claims.

Claims

1. A reverse osmosis composite filter element, comprising:

2. A reverse osmosis composite filter element according to claim 1,

the front upper end cover and the front lower end cover are both annular cover bodies;

3. The reverse osmosis composite filter cartridge of claim 2, further comprising:

4. A reverse osmosis composite filter element according to claim 3,

the RO membrane central tube comprises a first central tube positioned in the inner ring hollow area of the RO membrane element and a second central tube positioned in the inner ring hollow area of the pre-filter, and the diameter of the second central tube is larger than that of the first central tube;

5. The reverse osmosis composite filter element according to claim 2, wherein a water blocking component is arranged at the wastewater outlet and used for preventing wastewater from flowing back; the water blocking component comprises a waste water check valve or an elastic water blocking component.

6. A reverse osmosis composite filter element according to any one of claims 1 to 5,

the water inlet, the pure water port and the waste water port are positioned at the top end of the filter flask body;

7. A reverse osmosis composite filter element according to claim 1,

the front upper end cover is an annular cover body, and the front lower end cover is a plate-type cover body;

8. The reverse osmosis composite filter element according to claim 7, wherein the RO membrane upper end cover is a tubular shell with two open ends, the upper end opening of the RO membrane upper end cover is communicated with the waste water port, and the lower end of the RO membrane upper end cover is connected with the RO membrane element; the reverse osmosis composite filter element further comprises:

9. The reverse osmosis composite filter element of claim 7, wherein the filter flask body is further provided with a tap water port, and the reverse osmosis composite filter element further comprises: a water drive tank assembly;

10. The composite filter element of claim 9,

the water drive tank shell is an annular shell with openings at two ends, the lower end opening of the water drive tank shell is communicated with the upper end opening of the RO membrane central pipe, and the upper end opening of the water drive tank shell is communicated with the pure water port;

11. The reverse osmosis composite filter cartridge of claim 10, further comprising:

12. The composite filter element of claim 9,

the water drive tank shell is an annular shell with openings at two ends;

13. The reverse osmosis composite filter cartridge of claim 12, further comprising:

and the post-filter element assembly is positioned in the RO membrane central pipe and/or the water drive tank central pipe.

14. A reverse osmosis composite filter element according to any one of claims 7 to 13,