CN105195022A - Wound type RO (Reverse Osmosis) membrane filtering element and center water pipe thereof - Google Patents
Wound type RO (Reverse Osmosis) membrane filtering element and center water pipe thereof Download PDFInfo
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- CN105195022A CN105195022A CN201510683240.0A CN201510683240A CN105195022A CN 105195022 A CN105195022 A CN 105195022A CN 201510683240 A CN201510683240 A CN 201510683240A CN 105195022 A CN105195022 A CN 105195022A
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Abstract
The invention discloses a wound type RO (Reverse Osmosis) membrane filtering element and a center water pipe thereof. The center water pipe is provided with a concentrated water runner and a pure water runner, wherein a concentrated water inlet of the concentrated water runner and a pure water outlet of the pure water runner are respectively formed in the two end faces of the center water pipe; a concentrated water outlet of the concentrated water runner and a pure water inlet of the pure water runner are formed in the outer circumferential wall of the center water pipe; furthermore, the concentrated water inlet, the pure water inlet, the concentrated water outlet and the pure water outlet are arrayed in sequence along the axial direction. Compared with the current center water pipe, the two-runner center water pipe disclosed by the invention is provided with the concentrated water runner, so that concentrated water can flow into the concentrated water runner through an RO membrane set; the time that the concentrated water stays in the RO membrane set is shortened, and the quantity of impurities attached to the RO membrane set is reduced; therefore the actual service life of the RO membrane set can be close to the theoretical service life as much as possible.
Description
Technical field
The present invention relates to the technical field extending RO film group actual life, particularly a kind of takeup type RO membrane cartridge and central water tube thereof.
Background technology
Along with the development of RO (counter-infiltration) membrane technology, RO membrane cartridge has become the most frequently used filter element of water treatment field.
As shown in Figure 1, RO membrane cartridge comprises housing 1 ', RO film group 2 ', central water tube 3 ', top cover 4 ' and bottom 5 ', wherein, RO film group 2 ' is wound on central water tube 3 ', the bottom nozzle of bottom 5 ' shutoff central water tube 3 ' and the bottom face of RO film group 2 ' part, top cover 4 ' offers dense water out 4a ' and pure water outlet 4b ', top cover 4 ' is installed on central water tube 3 ' top, for blocking the original water inlet of RO film group 2 ' part and both top end faces of central water tube 3 ' and RO film group 2 ', and its dense water out 4a ' is communicated with the top end face of RO film group 2 ' part, its pure water outlet 4b ' is communicated with the top ports of central water tube 3 ', housing 1 ' and top cover 4 ' and bottom 5 ' both be connected and enclose with the periphery wall of RO film group 2 ' and form former water diversion cavity 1b ', housing 1 ' also can be provided with the former water introducing port 1a ' be communicated with Yuan Shui water source.
In addition, it should be noted that, filled arrows in Fig. 1
represent former current direction, hollow arrow
represent concentrated stream to, 30 ° of (degree) angle arrows
represent pure water to flow to.
Former water flows in former water flow passage chamber via the former water introducing port 1a ' of housing 1 ', RO film group 2 ' inner filtration is flowed into via the original water inlet of RO film group 2 ' again under hydraulic pressure effect, pure water after filtration flows in central water tube 3 ' by the pure water pod apertures 3a ' on central water tube 3 ' tube wall, flowed into the pure water runner of top cover 4 ' again by its top ports, export 4b ' discharge finally by the pure water by top cover 4 '; Meanwhile, the dense water formed after filtering flows into the concentrated stream road of top cover 4 ', finally by the dense water out 4a ' discharge of top cover 4 ' by the top end face of RO film group 2 ' part.
In practice, due to the concentrated stream road on top cover 4 ' and dense water out 4a ' less, concentrated water drainage goes out the comparatively slow very easily delay of speed with in RO film group 2 ', in holdup time longer dense water, impurity is more easily attached to RO film group 2 ' and reduces its filter efficiency, causes RO film group 2 ' to be shorter than its theoretical service life actual life.
In view of this, the actual life how being RO film group 2 ', as much as possible close to its theoretical service life, is those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
In order to solve above-mentioned technological deficiency, the invention provides a kind of central water tube being applicable to takeup type RO membrane cartridge, to extend the actual life of RO film group, making it closer to its theoretical service life.On this basis, the present invention also provides a kind of takeup type RO membrane cartridge comprising this central water tube.
The central water tube of a kind of takeup type RO membrane cartridge provided by the present invention, central water tube has concentrated stream road and pure water runner, wherein, the dense water inlet in concentrated stream road and the pure water outlet of pure water runner are opened in the both ends of the surface of central water tube respectively, the dense water out in concentrated stream road and the purified water inlet of pure water runner are all opened in the periphery wall of central water tube, and dense water inlet, purified water inlet, dense water out and pure water outlet are arranged vertically in turn.
Compared with existing central water tube, this dual channel central water tube has concentrated stream road, dense water is made to flow in concentrated stream road by RO in time, shorten the time of dense hydropexis in RO film group, then the impurity level being attached to RO film group is reduced, to make the actual life of RO film group as much as possible close to its theoretical service life.
Alternatively, described dense water out accounts for 80% ~ 85% of the axial overall length of described central water tube to the axial distance of described purified water inlet.
Alternatively, described pure water runner also comprises the periphery wall being opened in described central water tube and the axial diversion groove be communicated with described purified water inlet.
Alternatively, the flute length of described axial diversion groove account for described dense water out to described purified water inlet between the two axial distance 70% ~ 76%.
Alternatively, the number of described axial diversion groove is at least two, and described axial diversion groove is uniform relative to the axis of described central water tube and be communicated with each other by annular, peripheral guiding gutter.
Alternatively, described annular, peripheral guiding gutter number is at least two, described annular, peripheral guiding gutter spaced set vertically.
Alternatively, between described dense water inlet to described purified water inlet, the radial section configuration of described central water tube is annulus; Between described purified water inlet to described dense water out:
The radial section in described concentrated stream road is formed by connecting in turn by major arc section, the first tangent section, the first semicircle segmental arc and the second tangent section, all concentric with described annulus and the described major arc section radius of described major arc section and described first semicircle segmental arc is greater than the radius of described first semicircle segmental arc, one end of described first tangent section and described first semicircle segmental arc is tangent and extend to the intersect ends with described major arc section, and described second tangent section is tangent with the other end of described first semicircle segmental arc and extend to the other end of described major arc section crossing;
The radial section of described pure water runner is formed by connecting in turn by minor segment, the 3rd tangent section, the second semicircle segmental arc and the 4th tangent section, described minor segment is concentric isometrical with described major arc section, concentric and its radius is less than the radius of described first semicircle segmental arc to described second semicircle segmental arc with described first semicircle segmental arc, one end of described 3rd tangent section and described second semicircle segmental arc is tangent and extend to the intersect ends with described minor segment, and described 4th tangent section is tangent with the other end of described second semicircle segmental arc and extend to the other end of described minor segment crossing.
Alternatively, in radial section, described purified water inlet extends to the periphery wall shape of running through described central water tube by described 3rd tangent section and described 4th tangent section and is formed.
Alternatively, in radial section, described dense water out extends to by two tangent sections at the diameter both ends crossing described major arc section the periphery wall running through described central water tube and is formed.
Alternatively, described central water tube is specially integrated injection molding.
Except above-mentioned central water tube, the present invention also provides a kind of takeup type RO membrane cartridge, and comprise central water tube and the RO film group being wound in described central water tube, wherein, described central water tube is specially central water tube as above.
Because central water tube has above-mentioned technique effect, the takeup type RO membrane cartridge therefore comprising this central water tube has same technique effect, so do not repeat them here herein.
Accompanying drawing explanation
Fig. 1 shows the axial sectional structure schematic diagram of traditional RO membrane cartridge;
Fig. 2 shows the axle geodesic structure schematic diagram of central water tube provided by the present invention;
Fig. 3 shows the axial sectional structure schematic diagram of central water tube shown in Fig. 2;
Fig. 4 to Fig. 8 respectively illustrates the cross section structure schematic diagram of A-A, B-B, C-C, D-D, E-E in Fig. 3;
The F that Fig. 9 and Figure 10 shows Fig. 3 to G to partial structurtes schematic diagram.
Corresponding relation in Fig. 1 between Reference numeral and all parts title:
1 ' housing: former water introducing port 1a ', former water diversion cavity 1b ';
2 ' RO film group;
3 ' central water tube: 3a ' pure water pod apertures;
The dense water out of 4 ' top cover: 4a ', 4b ' pure water export;
5 ' bottom.
Corresponding relation in Fig. 2 to Figure 10 between Reference numeral and all parts title:
10 central water tube:
11a concentrated stream road, R1 major arc section, R2 first semicircle segmental arc, La first tangent section, Lb second tangent section, 11
indense water inlet, 11
outdense water out, Le the 5th tangent section, Lf the 6th tangent section;
12a pure water runner, R4 minor segment, R3 second semicircle segmental arc, Lc the 3rd tangent section, Ld the 4th tangent section, 12
inpurified water inlet, 12
outpure water outlet, 12b axial diversion groove, 12c annular, peripheral guiding gutter.
Detailed description of the invention
The invention provides a kind of central water tube with dual channel being applicable to takeup type RO membrane cartridge.On this basis, the present invention also provides the takeup type RO membrane cartridge of this central water tube.
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Refer to Fig. 2 and Fig. 3, wherein, Fig. 2 shows the axle geodesic structure schematic diagram of central water tube provided by the present invention, and Fig. 3 shows the axial sectional structure schematic diagram of central water tube shown in Fig. 2.It should be noted that, Fig. 2 hollow core arrow
represent concentrated stream to, 30 ° of (degree) angle arrows
represent pure water to flow to.
As shown in Figure 3, central water tube 10 has pure water runner 12a and concentrated stream road 11a, wherein, and the pure water outlet 12 of pure water runner 12a
outwith the dense water inlet 11 of concentrated stream road 11a
inbe opened in the both ends of the surface of central water tube 10 respectively, the purified water inlet 12 of pure water runner 12a
inwith the dense water out 11 of concentrated stream road 11a
outall offer the periphery wall of central water tube 10, and dense water inlet 11
in, purified water inlet 12
in, dense water out 11
outwith pure water outlet 12
outfour are arranged vertically in turn.For the ease of understanding the concrete structure of central water tube 10 better, please also refer to Fig. 2.
RO film group is wound in the dense water inlet 11 of central water tube 10
inwith dense water out 11
outbetween and coated purified water inlet 12
in, the pure water that former water is made after filtering via RO film group is via purified water inlet 12
inflow into pure water runner 12a, export 12 finally by by pure water
outdischarge; Meanwhile, filter the dense water produced to be gone out by one end surface current of RO film group and by dense water inlet 11
inflow into concentrated stream road 11a, finally by dense water out 11
outdischarge.
Obviously, compared with the central water tube 10 of existing single channel, adopting the above-mentioned central water tube 10 with dual channel that RO film group can be made to filter the dense water produced flows into rapidly in its concentrated stream road 11a, shorten dense hydropexis in the duration of RO film group, then decrease same equal time included in the impurity level of RO diaphragm, and then extend the actual life of RO film group, make it as much as possible close to its theoretical service life.
Further, as shown in Figure 3, in this detailed description of the invention, dense water inlet 11
into purified water inlet 12
inaxial distance L1 accounts for 80% ~ 85% of the axial overall length L of central water tube 10 between the two, namely illustrates, the concentrated stream road 11a axial length of central water tube 10 is far longer than the axial length of its pure water runner 12a.
Like this, longer concentrated stream road 11a can make dense water more easily flow into, and can further improve concentrated stream speed, then reduces the probability that dense impurities in water is attached to RO diaphragm further.In addition, compared to flushing RO diaphragm, the impurity be deposited in the concentrated stream road 11a of central water tube 10 more easily rinses and can't cause damage to RO diaphragm.
Continue see Fig. 3, pure water runner 12a also comprises two the axial diversion groove 12b and multiple annular, peripheral guiding gutter 12c that are opened in central water tube 10 periphery wall, wherein, two axial diversion groove 12b are distributed in its periphery wall relative to the center line 180 ° (degree) of central water tube 10, multiple annular, peripheral guiding gutter 12c spaced set successively vertically, and, for two axial diversion groove 12b are communicated with, one and purified water inlet 12 in two axial diversion groove 12b
inbe communicated with, another one is then by annular, peripheral guiding gutter 12c and purified water inlet 12
inbe communicated with.For ease of understanding the structure of axial diversion groove 12b better, please also refer to Fig. 7.
After pure water is flowed out by the winding initiating terminal of RO film group, the purified water inlet 12 of central water tube 10 can be flowed into by guiding gutter 12b vertically
in, and flow through central water tube 10 periphery wall and compare with RO film group binding face gap, be subject to resistance in pure water flow process less, greatly can improve the flow velocity of pure water, accelerate water yield.
In addition, two axial diversion groove 12b are offered at the periphery wall of central water tube 10 in this programme, be communicated with by multiple annular, peripheral guiding gutter 12c equidistantly offered vertically between two axial diversion groove 12b, in other words, namely at many guiding gutters extended along the axial and circumferential directions that central water tube 10 periphery wall is crisscross arranged, pure water can be improved further and go out water speed and pure water water yield.
Be appreciated that the quantity of axial diversion groove 12b can for differing from the one or more of this detailed description of the invention on the basis meeting water conservancy diversion pure water function, processing and assembling function requirement; And, when comprising multiple axial diversion groove 12b, the quantity being communicated with the annular, peripheral guiding gutter 12c of multiple axial diversion groove 12b also can be one that differs from this detailed description of the invention, and the concrete set-up mode of concrete quantity and multiple axial diversion groove 12b and annular diversion trench also can be determined according to the concrete structure of central water tube 10.
Also have; in this detailed description of the invention; in order to ensure pure water flow velocity uniformity; two axial diversion groove 12b are uniform relative to the center line 180 degree of central water tube 10; also has multiple annular, peripheral guiding gutter 12c equidistantly interval setting vertically; be appreciated that the arrangement of above-mentioned axial diversion groove 12b and annular, peripheral guiding gutter 12c is not limited in said structure, all protection scope of the present invention is fallen into both quantity and other distortion set-up modes.
Further, when meeting RO film group winding center water pipe 10 its periphery wall coated axial diversion groove 12b prerequisite under, in order to improve pure water flow velocity, the bottom land of axial diversion groove 12b is positioned as close to dense water inlet 11
inend, for this reason, in this detailed description of the invention, the dense water inlet 11 of central water tube 10
inaxial distance to axial diversion groove 12b bottom land accounts for dense water inlet 11
inwith purified water inlet 12
inbetween axial distance 70% ~ 76%.
In this detailed description of the invention, the outer cross sectional shape of central water tube 10 is circular, and compared with other polygons or profiled-cross-section structure, on the one hand, this structure can make RO film group reel and form spirality water flow passage, and in this runner, flow rate of water flow is even; On the other hand, simply, cost of manufacture is low for its manufacture craft and winding process.
Based on said structure, composition graphs 7 and Fig. 8 known, except dense water inlet 11
inthe cross sectional shape of concentrated stream road, end 11a is outside polygon, dense water inlet 11
into purified water inlet 12
inbetween, the cross sectional shape of central water tube 10 is annulus, and that is, the cross sectional shape of concentrated stream road 11a is circular.
Wherein, dense water inlet 11
inthe cross sectional shape of concentrated stream road, end 11a is set to polygon, is to prevent the bottom assembled with central water tube 10 from rotating relative to central water tube 10, also namely mentions and limits the effect of bottom relative to the rotational freedom of central water tube 10.
As shown in Figure 4, purified water inlet 12
into dense water out 11
outbetween, the cross section of concentrated stream road 11a is formed by connecting in turn by major arc section R1, the first tangent section La, the first semicircle segmental arc R2 and the second tangent section Lb, wherein, all concentric with the periphery wall of the central water tube 10 and radius of major arc section R1 of major arc section R1 and the first semi arch is greater than the radius of the first semicircle segmental arc R2, one end of the first tangent section La and the first semicircle segmental arc R2 is tangent and extend to the intersect ends with major arc section R1, equally, the second tangent section Lb is tangent with the other end of the first semi arch and extend to the other end of major arc section R1 crossing.
Continue see Fig. 4, purified water inlet 12
into dense water out 11
outbetween, the cross section of pure water runner 12a is by the second semicircle segmental arc R3, 3rd tangent section Lc, 4th tangent section Ld and minor segment R4 is formed by connecting in turn, wherein, minor segment R4 is concentric isometrical with the major arc section R1 of concentrated stream road 11a, second semicircle segmental arc R3 is in the same way concentric and radius is less than the first semicircle segmental arc R2 with the first semicircle segmental arc R2, one end of the 3rd tangent section Lc and the second semicircle segmental arc R3 is tangent and extend to the intersect ends with minor segment R4, equally, 4th tangent section Ld is tangent with the other end of the second semi arch and extend to the other end of minor segment R4 crossing.
Further, as shown in Figure 5, in radial section, the purified water inlet 12 of central water tube 10
inthe first tangent section La of pure water runner 12a in Fig. 4 and the second tangent section Lb is extended in the same way run through the formation of its tube wall.As shown in Figure 6, in radial section, the dense water out 11 of central water tube 10
outbe then extended to by the 5th tangent section Le of an end of the diameter of the major arc section R1 of concentrated stream road 11a in Fig. 4 to run through pipe periphery wall, the 6th tangent section Lf of the other end of major arc section R1 diameter extends to and runs through the formation of pipe periphery wall.
For the ease of understanding purified water inlet 12 better
inwith dense water out 11
outconcrete structure, please also refer to Fig. 9 and Figure 10.
This structure can ensure that the pipe wall thickness of central water tube 10, pure water runner 12a and pure water flow next door uniform wall thickness between the two, and make central water tube 10 integrated carrying even intensity, compact conformation is reasonable.
Finally it should be noted that, central water tube 10 injection moulding integrated molding in this detailed description of the invention, processing technology be simple, low cost of manufacture, certainly, meeting on the basis that processing technology requires, central water tube 10 also can cast or process for machining shaping.
The foregoing is only the preferred embodiment of the present invention, do not form limiting the scope of the present invention.Any any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within claims of the present invention.
Claims (11)
1. the central water tube of a takeup type RO membrane component, it is characterized in that, described central water tube (10) has concentrated stream road (11a) and pure water runner (12a), the dense water inlet (11 of described concentrated stream road (11a)
in) and described pure water runner (12a) pure water outlet (12
out) be opened in the both ends of the surface of described central water tube (10), the dense water out (11 of described concentrated stream road (11a) respectively
out) and the purified water inlet (12 of described pure water runner (12a)
in) be all opened in the periphery wall of described central water tube (10), described dense water inlet (11
in), described purified water inlet (12
in), described dense water out (11
out) and described pure water outlet (12
out) four to arrange in turn vertically.
2. central water tube (10) as claimed in claim 1, is characterized in that, described dense water out (11
out) to described purified water inlet (12
in) axial distance account for 80% ~ 85% of the axial overall length of described central water tube (10).
3. central water tube (10) as claimed in claim 1, is characterized in that, described pure water runner (12a) also comprise the periphery wall that is opened in described central water tube (10) and with described purified water inlet (12
in) the axial diversion groove (12b) that is communicated with.
4. central water tube (10) as claimed in claim 3, it is characterized in that, the flute length of described axial diversion groove (12b) accounts for described dense water out (11
out) to described purified water inlet (12
in) between the two axial distance 70% ~ 76%.
5. central water tube (10) as claimed in claim 3, it is characterized in that, the number of described axial diversion groove (12b) is at least two, and described axial diversion groove (12b) is uniform relative to the axis of described central water tube (10) and be communicated with each other by annular, peripheral guiding gutter (12c).
6. central water tube (10) as claimed in claim 4, it is characterized in that, described annular, peripheral guiding gutter (12c) number is at least two, described annular, peripheral guiding gutter (12c) spaced set vertically.
7. the central water tube (10) as described in any one of claim 1 to 6, is characterized in that, described dense water inlet (11
in) to described purified water inlet (12
in) between, the radial section configuration of described central water tube (10) is annulus; Described purified water inlet (12
in) to described dense water out (11
out) between:
The radial section of described concentrated stream road (11a) is by major arc section (R1), first tangent section (La), first semicircle segmental arc (R2) and the second tangent section (Lb) are formed by connecting in turn, all concentric with described annulus and described major arc section (R1) radius of described major arc section (R1) and described first semicircle segmental arc (R2) is greater than the radius of described first semicircle segmental arc (R2), one end of described first tangent section (La) and described first semicircle segmental arc (R2) is tangent and extend to the intersect ends with described major arc section (R1), described second tangent section (Lb) is tangent with the other end of described first semicircle segmental arc (R2) and extend to the other end of described major arc section (R1) crossing,
The radial section of described pure water runner (12a) is by minor segment (R4), 3rd tangent section (Lc), second semicircle segmental arc (R3) and the 4th tangent section (Ld) are formed by connecting in turn, described minor segment (R4) is concentric isometrical with described major arc section (R1), concentric and its radius is less than the radius of described first semicircle segmental arc (R2) to described second semicircle segmental arc (R3) with described first semicircle segmental arc (R2), one end of described 3rd tangent section (Lc) and described second semicircle segmental arc (R3) is tangent and extend to the intersect ends with described minor segment (R4), described 4th tangent section (Ld) is tangent with the other end of described second semicircle segmental arc (R3) and extend to the other end of described minor segment (R4) crossing.
8. central water tube (10) as claimed in claim 7, is characterized in that, in radial section, and described purified water inlet (12
in) extend to the periphery wall shape of running through described central water tube (10) by described 3rd tangent section (Lc) and described 4th tangent section (Ld) and formed.
9. central water tube (10) as claimed in claim 7, is characterized in that, in radial section, and described dense water out (11
out) extend to by two tangent sections at diameter both ends crossing described major arc section (R1) periphery wall running through described central water tube (10) and formed.
10. central water tube (10) as claimed in claim 7, it is characterized in that, described central water tube (10) is specially integrated injection molding.
11. 1 kinds of takeup type RO membrane cartridges, comprise central water tube (10) and be wound in the RO film group of described central water tube (10), it is characterized in that, described central water tube (10) is specially the central water tube (10) as described in any one of claim 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510683240.0A CN105195022B (en) | 2015-10-20 | 2015-10-20 | A kind of takeup type RO membrane cartridges and its central water tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510683240.0A CN105195022B (en) | 2015-10-20 | 2015-10-20 | A kind of takeup type RO membrane cartridges and its central water tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105195022A true CN105195022A (en) | 2015-12-30 |
| CN105195022B CN105195022B (en) | 2017-11-10 |
Family
ID=54943181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510683240.0A Active CN105195022B (en) | 2015-10-20 | 2015-10-20 | A kind of takeup type RO membrane cartridges and its central water tube |
Country Status (1)
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4476022A (en) * | 1983-03-11 | 1984-10-09 | Doll David W | Spirally wrapped reverse osmosis membrane cell |
| CN103007762A (en) * | 2012-12-21 | 2013-04-03 | 杭州自力太阳能科技有限公司 | Ladder water inflowing rolling membrane element of opening water producing runner |
| CN203540346U (en) * | 2013-11-05 | 2014-04-16 | 佛山市麦克罗美的滤芯设备制造有限公司 | Filter capable of protecting reverse osmosis membrane filter core |
| CN204619754U (en) * | 2015-04-02 | 2015-09-09 | 佛山市麦克罗美的滤芯设备制造有限公司 | The reverse osmosis membrane new construction of interior water inlet |
-
2015
- 2015-10-20 CN CN201510683240.0A patent/CN105195022B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4476022A (en) * | 1983-03-11 | 1984-10-09 | Doll David W | Spirally wrapped reverse osmosis membrane cell |
| CN103007762A (en) * | 2012-12-21 | 2013-04-03 | 杭州自力太阳能科技有限公司 | Ladder water inflowing rolling membrane element of opening water producing runner |
| CN203540346U (en) * | 2013-11-05 | 2014-04-16 | 佛山市麦克罗美的滤芯设备制造有限公司 | Filter capable of protecting reverse osmosis membrane filter core |
| CN204619754U (en) * | 2015-04-02 | 2015-09-09 | 佛山市麦克罗美的滤芯设备制造有限公司 | The reverse osmosis membrane new construction of interior water inlet |
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| Publication number | Publication date |
|---|---|
| CN105195022B (en) | 2017-11-10 |
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