CN105195022B - A kind of takeup type RO membrane cartridges and its central water tube - Google Patents
A kind of takeup type RO membrane cartridges and its central water tube Download PDFInfo
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- CN105195022B CN105195022B CN201510683240.0A CN201510683240A CN105195022B CN 105195022 B CN105195022 B CN 105195022B CN 201510683240 A CN201510683240 A CN 201510683240A CN 105195022 B CN105195022 B CN 105195022B
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Abstract
The invention discloses a kind of takeup type RO membrane cartridges and its central water tube, the central water tube has concentrated water runner and pure water runner, wherein, the concentrated water import of concentrated water runner and the pure water outlet of pure water runner are opened in the both ends of the surface of central water tube respectively, the concentrated water outlet of concentrated water runner and the purified water inlet of pure water runner are opened in the periphery wall of central water tube, and concentrated water import, purified water inlet, concentrated water outlet and pure water outlet are sequentially arranged vertically.Compared with existing central water tube, this dual channel central water tube has concentrated water runner, concentrated water is set to be flowed into time by RO in concentrated water runner, shorten the time that concentrated water is stranded in RO film groups, then the impurity level for being attached to RO film groups is reduced, so that the actual life of RO film groups is close to its theoretical service life.
Description
Technical field
The present invention relates to the technical field for extending RO film group actual lives, more particularly to a kind of takeup type RO membrane cartridges
And its central water tube.
Background technology
With the continuous development of RO (counter-infiltration) membrane technology, RO membrane cartridges have turned into the most frequently used mistake filtering element of water treatment field
Part.
As shown in figure 1, RO membrane cartridges include housing 1 ', RO films group 2 ', central water tube 3 ', top cover 4 ' and bottom 5 ', wherein,
RO films group 2 ' is wound on central water tube 3 ', and bottom 5 ' blocks the bottom nozzle of central water tube 3 ' and the bottom face of the part of RO films group 2 ',
Top cover 4 ' offers concentrated water outlet 4a ' and pure water outlet 4b ', and top cover 4 ' is installed on the top of central water tube 3 ', for blocking RO films
2 ' parts of group and both top end faces of central water tube 3 ' and the original water inlet of RO films group 2 ', and its concentrated water outlet 4a ' and RO film groups
The top end face connection of 2 ' parts, its pure water outlet 4b ' connect with the top ports of central water tube 3 ', housing 1 ' and top cover 4 ' and bottom 5 '
Both are connected and enclose to form raw water diversion cavity 1b ' with the periphery wall of RO films group 2 ', and housing 1 ' can be also provided with to be connected with raw water water source
Logical raw water introducing port 1a '.
Furthermore, it is necessary to illustrate, filled arrows in Fig. 1Represent raw water flow direction, hollow arrow
Represent concentrated water flow direction, 30 ° of (degree) angle arrowsRepresent pure water flow direction.
Raw water is flowed into raw water flow passage chamber via the raw water introducing port 1a ' of housing 1 ', then via RO films under hydraulic pressure effect
The original water inlet of group 2 ' flows into the 2 ' interior filtering of RO films group, and the pure water after filtering is by the pure water pod apertures on the tube wall of central water tube 3 '
3a ' inflows central water tube 3 ' is interior, then the pure water runner of top cover 4 ' is flowed into by its top ports, is finally exported via the pure water of top cover 4 '
4b ' discharges；At the same time, the concentrated water formed after filtering is flowed into the concentrated water runner of top cover 4 ' by the top end face of the part of RO films group 2 ', most
4a ' discharges are exported by the concentrated water of top cover 4 '.
In practice, because the concentrated water runner on top cover 4 ' and concentrated water outlet 4a ' are smaller, the concentrated water velocity of discharge relatively it is slow easily
Delay is interior with RO films group 2 ', and impurity is more easily attached to RO films group 2 ' and reduces its filter efficiency in holdup time longer concentrated water, leads
The actual life of RO films group 2 ' is caused to be shorter than its theoretical service life.
In view of this, how to be RO films group 2 ' actual life close to its theoretical service life, be this
Art personnel technical problem urgently to be resolved hurrily.
The content of the invention
In order to solve above-mentioned technological deficiency, the present invention provides a kind of central water tube suitable for takeup type RO membrane cartridges, with
Extend the actual life of RO film groups, be closer in its theoretical service life.On this basis, the present invention also provides one
Kind includes the takeup type RO membrane cartridges of the central water tube.
A kind of central water tube of takeup type RO membrane cartridges provided by the present invention, central water tube have concentrated water runner and pure water
Runner, wherein, the concentrated water import of concentrated water runner and the pure water of pure water runner export the both ends of the surface for being opened in central water tube respectively, dense
The concentrated water outlet of water flow passage and the purified water inlet of pure water runner are opened in the periphery wall of central water tube, and, concentrated water import, pure water
Import, concentrated water outlet and pure water outlet are sequentially arranged vertically.
Compared with existing central water tube, this dual channel central water tube has concentrated water runner, concentrated water is flowed in time by RO
Enter in concentrated water runner, shorten the time that concentrated water is stranded in RO film groups, then reduce the impurity level for being attached to RO film groups, with
Make the actual life of RO film groups close to its theoretical service life.
Alternatively, the concentrated water is exported to the axial distance of the purified water inlet and accounts for the axial overall length of the central water tube
80%~85%.
Alternatively, the pure water runner also includes the periphery wall for being opened in the central water tube and connected with the purified water inlet
Logical axial diversion groove.
Alternatively, the flute length of the axial diversion groove accounts for the concentrated water and is exported to purified water inlet axial distance between the two
70%~76%.
Alternatively, the number of the axial diversion groove is at least two, and the axial diversion groove is relative to the middle edema with the heart involved
The axis of pipe is uniform and is connected each other by annular, peripheral guiding gutter.
Alternatively, the annular, peripheral guiding gutter number at least two, between the annular, peripheral guiding gutter waits vertically
Away from setting.
Alternatively, between the purified water inlet, the radial direction section configuration of the central water tube is annulus for the concentrated water import；
Between the purified water inlet to the concentrated water exports：
The radial direction section of the concentrated water runner is suitable by major arc section, the first tangent section, the first semicircle segmental arc and the second tangent section
It is secondary to be formed by connecting, the major arc section and the first semicircle segmental arc is concentric with the annulus and the major arc section radius is more than institute
State the radius of the first semicircle segmental arc, the one end of first tangent section and the first semicircle segmental arc is tangent and extends to and institute
The one end for stating major arc section intersects, the other end of second tangent section and the first semicircle segmental arc it is tangent and extend to
Intersect the other end of the major arc section；
The radial direction section of the pure water runner is suitable by minor segment, the 3rd tangent section, the second semicircle segmental arc and the 4th tangent section
Secondary to be formed by connecting, the minor segment and the major arc section are concentric isometrical, the second semicircle segmental arc and the first semicircle segmental arc
With one heart and its radius is less than the radius of the first semicircle segmental arc, the 3rd tangent section and one end of the second semicircle segmental arc
Portion is tangent and extends to and intersects with the one end of the minor segment, and the 4th tangent section is another with the second semicircle segmental arc
End is tangent and extends to and intersects with the other end of the minor segment.
Alternatively, in radial direction section, the purified water inlet is extended to by the 3rd tangent section and the 4th tangent section
Periphery wall shape through the central water tube is formed.
Alternatively, in radial direction section, the concentrated water is exported by two tangent lines at a diameter both ends of excessively described major arc section
The periphery wall that section extends to through the central water tube is formed.
Alternatively, the central water tube is specially integrated injection molding.
In addition to above-mentioned central water tube, the present invention also provides a kind of takeup type RO membrane cartridges, including central water tube and is wound in
The RO film groups of the central water tube, wherein, the central water tube is specially central water tube as described above.
Because central water tube has above-mentioned technique effect, therefore the takeup type RO membrane cartridges including the central water tube have together
The technique effect of sample, so repeat no more herein.
Brief description of the drawings
Fig. 1 shows the axial cross section structure diagram of traditional RO membrane cartridges；
Fig. 2 shows the axle geodesic structure schematic diagram of central water tube provided by the present invention；
Fig. 3 shows the axial cross section structure 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；
Fig. 9 and Figure 10 show Fig. 3 F to G to partial structural diagram.
Corresponding relation in Fig. 1 between reference and all parts title：
1 ' housing：Raw water introducing port 1a ', raw water diversion cavity 1b '；
2 ' RO film groups；
3 ' central water tubes：3a ' pure water pod apertures；
4 ' top covers：The outlet of 4a ' concentrated waters, the outlet of 4b ' pure water；
5 ' bottoms.
Corresponding relations of the Fig. 2 into Figure 10 between reference and all parts title：
10 central water tubes：
11a concentrated waters runner, R1 major arcs section, the first semicircles of R2 segmental arc, the tangent sections of La first, the tangent sections of Lb second, 11inConcentrated water
Import, 11outConcentrated water outlet, the tangent sections of Le the 5th, the tangent sections of Lf the 6th；
12a pure water runner, R4 minor segments, the second semicircles of R3 segmental arc, the tangent sections of Lc the 3rd, the tangent sections of Ld the 4th, 12inPure water
Import, 12outPure water outlet, 12b axial diversions groove, 12c annular, peripheral guiding gutters.
Embodiment
The invention provides a kind of central water tube with dual channel suitable for takeup type RO membrane cartridges.It is basic herein
On, the present invention also provides the takeup type RO membrane cartridges of this central water tube.
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Fig. 2 and Fig. 3 are referred to, wherein, Fig. 2 shows the axle geodesic structure schematic diagram of central water tube provided by the present invention,
Fig. 3 shows the axial cross section structure diagram of central water tube shown in Fig. 2.It should be noted that hollow arrow in Fig. 2Represent concentrated water flow direction, 30 ° of (degree) angle arrowsRepresent pure water flow direction.
As shown in figure 3, central water tube 10 has pure water runner 12a and concentrated water runner 11a, wherein, pure water runner 12a's is pure
Water out 12outWith concentrated water runner 11a concentrated water import 11inThe both ends of the surface of central water tube 10, pure water runner 12a are opened in respectively
Purified water inlet 12in11 are exported with concentrated water runner 11a concentrated wateroutOpen up the periphery wall of central water tube 10, and concentrated water import
11in, purified water inlet 12in, concentrated water outlet 11outWith pure water outlet 12outFour are sequentially arranged vertically.For the ease of preferably
The concrete structure of central water tube 10 is understood, please also refer to Fig. 2.
RO film groups are wound in the concentrated water import 11 of central water tube 10inWith concentrated water outlet 11outBetween and coat purified water inlet
12in, manufactured pure water is via purified water inlet 12 after raw water filters via RO films groupinPure water runner 12a is flowed into, finally via pure
Water out 12outDischarge；At the same time, concentrated water caused by filtering is flowed out and by concentrated water import 11 by the end face of RO film groupsinFlow into
Concentrated water runner 11a, most export 11 through concentrated water afterwardsoutDischarge.
Obviously, compared with the central water tube 10 of existing single channel, can be made using the above-mentioned central water tube 10 with dual channel
Concentrated water caused by the filtering of RO films group is flowed into rapidly in its concentrated water runner 11a, shortens the duration that concentrated water is stranded in RO film groups, then
Reduce the impurity level that RO diaphragms are attached in the equal time, and then extend the actual life of RO film groups, be allowed to the greatest extent may be used
Can ground close to its theoretical service life.
Further, as shown in figure 3, in present embodiment, concentrated water import 11inTo purified water inlet 12inBoth countershafts
The 80%~85% of the axial overall length L of central water tube 10 is accounted for distance L1, that is to say, that bright, the concentrated water runner 11a of central water tube 10
Axial length is far longer than its pure water runner 12a axial length.
So, longer concentrated water runner 11a can be such that concentrated water more easily flows into, and can further improve concentrated water flow velocity, after
And further reduce the probability that dense impurities in water is attached to RO diaphragms.In addition, compared to RO diaphragms are rinsed, middle edema with the heart involved is deposited on
Impurity in the concentrated water runner 11a of pipe 10 is easier to flushing and RO diaphragms can't be caused to damage.
With continued reference to Fig. 3, pure water runner 12a also includes two axial diversion grooves for being opened in the periphery wall of central water tube 10
12b and multiple annular, peripheral guiding gutter 12c, wherein, two axial diversion groove 12b relative to central water tube 10 180 ° of center line
(degree) is distributed in its periphery wall, multiple annular, peripheral guiding gutter 12c spaced sets successively vertically, and, for by two axles
Connected to guiding gutter 12b, one and purified water inlet 12 in two axial diversion groove 12binConnection, and another one then passes through annular week
To guiding gutter 12c and purified water inlet 12inConnection.For ease of more fully understanding axial diversion groove 12b structure, please also refer to figure
7。
Pure water by RO film groups winding initiating terminal outflow after, can vertically guiding gutter 12b flow into central water tube 10 pure water
Import 12in, compared with flowing through both the periphery wall of central water tube 10 and RO film groups binding face gap, hindered during pure water flowing
Power is smaller, can be greatly enhanced the flow velocity of pure water, accelerates water yield.
In addition, the periphery wall in this programme in central water tube 10 opens up two axial diversion groove 12b, two axial diversion grooves
Connected between 12b by multiple annular, peripheral guiding gutter 12c equidistantly opened up vertically, in other words, that is, in middle edema with the heart involved
The a plurality of axially and circumferentially extending guiding gutter that the periphery wall of pipe 10 is staggered, can further improve pure water go out water speed and
Pure water water yield.
It is appreciated that on the basis of water conservancy diversion pure water function, processing and assembling function requirement is met, axial diversion groove 12b
Quantity can be different from present embodiment one or more；Moreover, during including multiple axial diversion groove 12b, connection
Multiple axial diversion groove 12b annular, peripheral guiding gutter 12c quantity also can be one different from present embodiment, specifically
Quantity and the specific set-up mode of multiple axial diversion groove 12b and annular diversion trench also can be according to the concrete structures of central water tube 10
To determine.
Further, in present embodiment, in order to ensure pure water flow velocity uniformity, two axial diversion groove 12b relative to
The center line 180 degree of central water tube 10 is uniform, and also multiple annular, peripheral guiding gutter 12c are equidistantly arranged at intervals vertically, can
To understand, above-mentioned axial diversion groove 12b and annular, peripheral guiding gutter 12c arrangement is not limited in said structure, to two
Person's quantity and other deformation set-up modes each fall within protection scope of the present invention.
Further, under the premise of coating the axial diversion groove 12b of its periphery wall when meeting RO film group winding center water pipes 10,
In order to improve pure water flow velocity, axial diversion groove 12b bottom land is positioned as close to concentrated water import 11inEnd, therefore, this specific implementation
In mode, the concentrated water import 11 of central water tube 10inAxial distance to axial diversion groove 12b bottom lands accounts for concentrated water import 11inWith it is pure
Water inlet 12inBetween axial distance 70%~76%.
In present embodiment, the outer cross section of central water tube 10 is shaped as circle, with other polygons or profiled-cross-section
Structure is compared, on the one hand, this structure can make RO film groups wind to form helical flow of water runner, the flow rate of water flow in this runner
Uniformly；On the other hand, its manufacture craft and winding process are simple, low manufacture cost.
Based on said structure, understood with reference to Fig. 7 and Fig. 8, except concentrated water import 11inEnd concentrated water runner 11a section shape
Shape is concentrated water import 11 outside polygoninTo purified water inlet 12inBetween, the cross sectional shape of central water tube 10 is annulus, that is to say, that
Concentrated water runner 11a cross sectional shape is circle.
Wherein, concentrated water import 11inEnd concentrated water runner 11a cross sectional shape is arranged to polygon, be in order to prevent with
The bottom that central water tube 10 assembles rotates relative to central water tube 10, namely mentions and limit turn of the bottom relative to central water tube 10
The effect of the dynamic free degree.
As shown in figure 4, purified water inlet 12inTo concentrated water outlet 11outBetween, concentrated water runner 11a section is by major arc section R1,
One tangent section La, the first semicircle segmental arc R2 and the second tangent section Lb are sequentially connected with and formed, wherein, major arc section R1 and the first semi arch
Concentric with the periphery wall of central water tube 10 and major arc section R1 radius is more than the first semicircle segmental arc R2 radius, the first tangent section
La is tangent with the first semicircle segmental arc R2 one end and extends to and intersects with major arc section R1 one end, equally, the second tangent section
Lb is tangent with the other end of the first semi arch and extends to and intersects with major arc section R1 the other end.
With continued reference to Fig. 4, purified water inlet 12inTo concentrated water outlet 11outBetween, pure water runner 12a section is by the second semi arch
Section R3, the 3rd tangent section Lc, the 4th tangent section Ld and minor segment R4 are sequentially connected with and formed, wherein, minor segment R4 and concentrated water runner
11a major arc section R1 is isometrical with one heart, and the second semicircle segmental arc R3 and the first semicircle segmental arc R2 is concentric in the same direction and radius is less than the first half
Arc section R2, the 3rd tangent section Lc and the second semicircle segmental arc R3 one end are tangent and extend to the one end phase with minor segment R4
Hand over, equally, the other end of the 4th tangent section Ld and the second semi arch is tangent and extends to the other end phase with minor segment R4
Hand over.
Further, as shown in figure 5, in radial direction section, the purified water inlet 12 of central water tube 10inIt is by pure water runner in Fig. 4
12a the first tangent section La and the second tangent section Lb is extended in the same direction to through its tube wall and formed.As shown in fig. 6, in radial direction section,
The concentrated water outlet 11 of central water tube 10outIt is then by the 5th of the one end of concentrated water runner 11a major arc section R1 diameter in Fig. 4 the
Tangent section Le extends to be extended to through pipe periphery through pipe periphery wall, the 6th tangent section Lf of the other end of major arc section R1 diameters
Wall is formed.
For the ease of more fully understanding purified water inlet 12inWith concentrated water outlet 11outConcrete structure, please also refer to Fig. 9 and
Figure 10.
This structure can ensure the pipe wall thickness of central water tube 10, pure water runner 12a and pure water flowing next door wall between the two
It is thick uniformly to make the integrated carrying even intensity of central water tube 10, it is compact-sized reasonable.
It is last it should be noted that the injection moulding integrated molding of central water tube 10 in present embodiment, processing technology is simple,
Manufacturing cost is low, certainly, meet processing technology requirement on the basis of, central water tube 10 also may be cast as or process for machining into
Type.
The preferred embodiment of the present invention is the foregoing is only, is not intended to limit the scope of the present invention..It is any
All any modification, equivalent and improvement made within the spirit and principles in the present invention etc., it should be included in the power of the present invention
Within the scope of profit is claimed.
Claims (9)
1. a kind of central water tube of takeup type RO membrane components, it is characterised in that the central water tube (10) has concentrated water runner
(11a) and pure water runner (12a), the concentrated water import (11 of the concentrated water runner (11a)in) and the pure water runner (12a) is pure
Water out (12out) both ends of the surface of the central water tube (10), the concentrated water outlet of the concentrated water runner (11a) are opened in respectively
(11out) and the pure water runner (12a) purified water inlet (12in) periphery wall of the central water tube (10) is opened in, it is described
Concentrated water import (11in), the purified water inlet (12in), the concentrated water outlet (11out) and pure water outlet (12out) four edges
Axially it is sequentially arranged；The concentrated water import (11in) to the purified water inlet (12in) axial distance account for the central water tube
(10) the 80%~85% of axial overall length；The pure water runner (12a) also includes being opened in the outer of the central water tube (10)
Perisporium and with the purified water inlet (12in) connection axial diversion groove (12b).
2. central water tube (10) as claimed in claim 1, it is characterised in that the flute length of the axial diversion groove (12b) accounts for institute
State concentrated water import (11in) to the purified water inlet (12in) between the two axial distance 70%~76%.
3. central water tube (10) as claimed in claim 1, it is characterised in that the number of the axial diversion groove (12b) is extremely
Few two, the axial diversion groove (12b) is uniform relative to the axis of the central water tube (10) and each other by annular, peripheral
Guiding gutter (12c) connects.
4. central water tube (10) as claimed in claim 3, it is characterised in that annular, peripheral guiding gutter (12c) number is extremely
It is two less, the annular, peripheral guiding gutter (12c) spaced set vertically.
5. the central water tube (10) as described in any one of Claims 1-4, it is characterised in that the concentrated water import (11in) to institute
State purified water inlet (12in) between, the radial direction section configuration of the central water tube (10) is annulus；The purified water inlet (12in) to institute
State concentrated water outlet (11out) between：
The radial direction section of the concentrated water runner (11a) by major arc section (R1), the first tangent section (La), the first semicircle segmental arc (R2) and
Second tangent section (Lb), which is sequentially connected with, to be formed, and the major arc section (R1) and the first semicircle segmental arc (R2) are same with the annulus
The heart and the major arc section (R1) radius are more than the radius of the first semicircle segmental arc (R2), first tangent section (La) with it is described
The one end of first semicircle segmental arc (R2) is tangent and extends to and intersects with the one end of the major arc section (R1), second tangent line
The other end of section (Lb) and the first semicircle segmental arc (R2) is tangent and extends to the other end with the major arc section (R1)
It is intersecting；
The radial direction section of the pure water runner (12a) by minor segment (R4), the 3rd tangent section (Lc), the second semicircle segmental arc (R3) and
4th tangent section (Ld), which is sequentially connected with, to be formed, and the minor segment (R4) and the major arc section (R1) are concentric isometrical, and described the second half
Arc section (R3) is concentric with the first semicircle segmental arc (R2) and its radius is less than the radius of the first semicircle segmental arc (R2), institute
The one end for stating the 3rd tangent section (Lc) and the second semicircle segmental arc (R3) is tangent and extend to and the minor segment (R4)
One end intersects, and the other end of the 4th tangent section (Ld) and the second semicircle segmental arc (R3) is tangent and extends to and institute
Intersect the other end for stating minor segment (R4).
6. central water tube (10) as claimed in claim 5, it is characterised in that in radial direction section, the purified water inlet (12in) by
3rd tangent section (Lc) and the 4th tangent section (Ld) extend to the periphery wall shape shape through the central water tube (10)
Into.
7. central water tube (10) as claimed in claim 5, it is characterised in that in radial direction section, the concentrated water outlet (11out)
Extended to by two tangent sections at a diameter both ends of excessively described major arc section (R1) through the periphery of the central water tube (10)
Wall is formed.
8. central water tube (10) as claimed in claim 5, it is characterised in that the central water tube (10) is specially integrated injection molding
Shaping.
9. a kind of takeup type RO membrane cartridges, including central water tube (10) and the RO film groups for being wound in the central water tube (10), its
It is characterised by, the central water tube (10) is specially the central water tube (10) as described in any one of claim 1 to 8.
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 |
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| 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 |
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| CN105195022A CN105195022A (en) | 2015-12-30 |
| CN105195022B true CN105195022B (en) | 2017-11-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2023550227A (en) * | 2020-09-08 | 2023-12-01 | サンフラワー セラピューティクス，ピービーシー | Cell holding device |
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 |
|---|---|
| CN105195022A (en) | 2015-12-30 |
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