CN109879371A - A kind of two way alternate formula water purification machine membrane filtration system - Google Patents
A kind of two way alternate formula water purification machine membrane filtration system Download PDFInfo
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- CN109879371A CN109879371A CN201910190738.1A CN201910190738A CN109879371A CN 109879371 A CN109879371 A CN 109879371A CN 201910190738 A CN201910190738 A CN 201910190738A CN 109879371 A CN109879371 A CN 109879371A
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- port
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- film filtration
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 143
- 238000000746 purification Methods 0.000 title claims abstract description 21
- 238000005374 membrane filtration Methods 0.000 title claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 99
- 239000008399 tap water Substances 0.000 claims abstract description 51
- 235000020679 tap water Nutrition 0.000 claims abstract description 51
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 33
- 239000012528 membrane Substances 0.000 claims abstract description 31
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001728 nano-filtration Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of two way alternate formula water purification machine membrane filtration systems, it is provided with film filtration module, film filtration module is connected with the first pipeline and the second pipeline, the pure water water outlet side of film filtration module is connected with the third pipeline for pure water discharge, first pipeline is provided with tap water inlet pipe and concentrated water outlet pipe, second pipeline is provided with tap water inlet pipe and concentrated water outlet pipe, and the first pipeline and the second pipeline realize film filtration module both ends first state, the second state alternate run；In first state, tap water enters film filtration module from the first pipeline, is discharged by film filtration module treated concentrated water by the second pipeline；In the second state, tap water enters film filtration module from the second pipeline, passes through the first pipeline by film filtration module treated concentrated water and is discharged；Reverse osmosis membrane would not be always in the same place contact concentrated water, so the risk of membrane component fouling substantially reduces, to improve the service life of whole system.
Description
Technical field
The present invention relates to Domestic water purifying technical field, in particular to a kind of two way alternate formula water purification machine membrane filtration system.
Background technique
With China's expanding economy, the pollution of water resource is also increasingly severe, and the water quality of municipal tap water cannot expire
The demand of sufficient people, more and more people select purchase water purifier, to guarantee the safety of drinking water.
Widely used or reverse osmosis membrane technology in Domestic water purifying technology at present, it is still, poor in some water quality
The concentrated water concentration in place, counter-infiltration system is higher, and the risk of counter-infiltration system fouling is just very big, so leading to these local reverse osmosis
The service life of permeable membrane all compares short.
Therefore in view of the shortcomings of the prior art, provide a kind of two way alternate formula water purification machine membrane filtration system very it is necessary to.
Summary of the invention
The purpose of the present invention is to solve defects in the prior art, provide a kind of two way alternate formula water purification machine film filtering
System, it is ensured that the stabilization of the producing water water quality in reverse osmosis water purification machine.
To achieve the above object, technical scheme is as follows:
A kind of two way alternate formula water purification machine membrane filtration system, is provided with film filtration module, and the film filtration module is connected with
First pipeline and the second pipeline, the pure water water outlet side of film filtration module are connected with the third pipeline for pure water discharge, and described the
One pipeline is provided with tap water inlet pipe and concentrated water outlet pipe, and second pipeline is provided with tap water inlet pipe and concentrated water water outlet
Pipe, first pipeline and the second pipeline realize film filtration module both ends first state, the second state alternate run；
In first state, tap water enters film filtration module from the first pipeline, by film filtration module treated concentrated water
It is discharged by the second pipeline；In the second state, tap water enters film filtration module from the second pipeline, handles by film filtration module
Concentrated water afterwards is discharged by the first pipeline.
In order to further realize the present invention, first pipeline is provided with the first triple valve, first triple valve first
The second port that port is connected to first triple valve with running water pipe is connected to film filtration module, and the of first triple valve
Three ports are connected to concentrated water outlet pipe；
Second pipeline, which is provided with, is connected with the second triple valve, and the second triple valve first port and running water pipe connect
Logical, the second port of second triple valve is connected to film filtration module, and the third port of second triple valve goes out with concentrated water
Water pipe connection.
In order to further realize the present invention, tap water enters film filtration module by the first pipeline, after the processing of film filtration module
The concentrated water of generation is discharged by the second pipeline, and the first port and second port of the first triple valve are opened, the third of the first triple valve
Port shutdown, the second port of the second triple valve and third port are opened, and the first port of the second triple valve is closed, tap water from
The first port of first triple valve and second port inflow film filtration module progress are reverse osmosis, and the pure water of output is by third tubes rows
Out, concentrated water flows out to the discharge of concentrated water outlet pipe by the second port and third port of the second triple valve.
In order to further realize the present invention, tap water enters film filtration module by the second pipeline, after the processing of film filtration module
The concentrated water of generation is discharged by the first pipeline, and the second port and third port of the first triple valve are opened, and the first of the first triple valve
Port shutdown, the first port of the second triple valve and second port are opened, and the third port of the second triple valve is closed, tap water from
The first port and second port of second triple valve flow into reverse osmosis membrane.Group progress is reverse osmosis, and the pure water of output is by third pipeline
Discharge, concentrated water flow out to concentrated water outlet pipe by the second port and third port of the first triple valve and are discharged.
In order to further realize the present invention, the first pipeline setting there are two two-port valve, respectively the first two-port valve and
Second two-port valve, there are two triple valves, respectively third two-port valve and the 4th two-port valve for the second pipeline setting.
In order to further realize the present invention, the film filtration module is connected to by the first two-port valve with running water pipe, described
Film filtration module is connected to by the second two-port valve with concentrated water outlet pipe, and the film filtration module passes through third two-port valve and tap water
Water pipe connection, the film filtration module are connected to by the 4th two-port valve with concentrated water outlet pipe.
In order to further realize the present invention, tap water enters film filtration module by the first pipeline, after the processing of film filtration module
The concentrated water of generation is discharged by the second pipeline, opens the first two-port valve and the 4th two-port valve, closes the second two-port valve and third two-way
Valve, tap water from the first two-port valve enter film filtration module carry out it is reverse osmosis, the pure water of output is discharged by third pipeline, concentrated water by
4th two-port valve flows out to the discharge of concentrated water outlet pipe.
In order to further realize the present invention, tap water enters film filtration module by the second pipeline, after the processing of film filtration module
The concentrated water of generation is discharged by the first pipeline, opens the second two-port valve and third two-port valve, closes the first two-port valve and the 4th two-way
Valve, tap water from third two-port valve enter film filtration module carry out it is reverse osmosis, the pure water of output is discharged by third pipeline, concentrated water by
Second two-port valve flows out to the discharge of concentrated water outlet pipe.
In order to further realize the present invention, the film filtration module is reverse osmosis membrane group or nanofiltration membrane group.
In order to further realize the present invention, first pipeline and the second pipeline realize the first shape of film filtration module both ends
State, the second state alternate run time are less than or equal to one day.
Beneficial effect
The transition that film filtration module both ends are all tap water Yu concentrated water alternate run may be implemented in the present invention, and reverse osmosis membrane is just
It will not be always in the same place contact concentrated water, so the risk of membrane component fouling substantially reduces, to improve whole system
Service life.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of an embodiment of the present invention 1；
Fig. 2 is the structural schematic diagram of the embodiment of the present invention 2.
Include: in Fig. 1, Fig. 2
Film filtration module 1；
First triple valve 11；
Second triple valve 12；
First two-port valve 13；
Second two-port valve 14；
Third two-port valve 15；
4th two-port valve 16；
Waste water proportioner 2.
Specific embodiment
The present invention is further described in detail with reference to the accompanying drawing, these attached drawings are simplified schematic diagram, only
The basic structure that the invention is illustrated in a schematic way.
Embodiment 1
As shown in Figure 1, the present invention provides a kind of two way alternate formula water purification machine membrane filtration system, it is provided with film filtration module 1,
Film filtration module 1 is connected with the first pipeline and the second pipeline, and the pure water water outlet side of film filtration module 1 is connected with to be discharged for pure water
Third pipeline, the first pipeline is provided with tap water inlet pipe and concentrated water outlet pipe, and the second pipeline is provided with tap water inlet pipe
With concentrated water outlet pipe, the first pipeline and the second pipeline can realize film filtration module both ends first state, the second state alternate run；
In first state, tap water enters film filtration module from the first pipeline, by film filtration module treated concentrated water
It is discharged by the second pipeline；In the second state, tap water enters film filtration module from the second pipeline, handles by film filtration module
Concentrated water afterwards is discharged by the first pipeline, and the first pipeline and the second pipeline realize film filtration module both ends first state, the second shape
The state alternate run time is to switch less than or equal to one day, and when preferred each open system.
Film filtration module is reverse osmosis membrane group or nanofiltration membrane group, and in the present embodiment, film filtration module is reverse osmosis membrane group,
For reverse osmosis membrane group at least provided with a reverse osmosis membrane, reverse osmosis membrane, which is that a kind of simulation biological semi-permeable film is manufactured, has certain spy
The artificial semi-permeable membrane of property, specifically, reverse osmosis membrane is made of cellulose acetate or aromatic polyamides, and the pore size of permeable membrane is
0.0001~0.001 μm.
It should be noted that the quantity for constituting the reverse osmosis membrane of film filtration module 1 is not limited to one in the present embodiment,
It may be set to be multiple, such as two, three, five, ten, 30.The mounting means of reverse osmosis membrane is that this field is public
Know common sense, details are not described herein.
First pipeline is provided with the first triple valve 11, and 11 first port 111 of the first triple valve is connected to running water pipe, and first
The second port 112 of triple valve 11 is connected to film filtration module, and 113 mouthfuls of the third end of the first triple valve 11 connects with concentrated water outlet pipe
Logical, the second pipeline, which is provided with, is connected with the second triple valve 12, and 12 first port 121 of the second triple valve is connected to running water pipe, the
The second port 122 of two triple valves 12 is connected to film filtration module 1, and the third port 123 and concentrated water of the second triple valve 12 are discharged
Pipe connection.
Tap water enters film filtration module 1 by the first pipeline, and the concentrated water generated after the processing of film filtration module 1 is by the second pipeline
Discharge, the first port 111 and second port 112 of the first triple valve 11 are opened, at this point, the third port of the first triple valve 11
113 close, and the second port 122 and third port 123 of the second triple valve 12 are opened, the first port 121 of the second triple valve 12
Close, tap water carried out from the first port 111 of the first triple valve 11 and the inflow of second port 112 film filtration module 1 it is reverse osmosis,
The pure water of output is discharged by third pipeline, and concentrated water is flowed out to by the second port 122 of the second triple valve 12 with third port 123 dense
The discharge of water outlet pipe.
Tap water enters film filtration module by the second pipeline, and the concentrated water generated after the processing of film filtration module is by the first tubes rows
Out, the second port 112 Yu third port 113 of the first triple valve 11 are opened, and the first port 111 of the first triple valve 11 is closed,
The first port 121 and second port 122 of second triple valve 12 are opened, and the third port 123 of the second triple valve 12 is closed, originally
Water from the first port 121 of the second triple valve 12 and second port 122 flow into film filtration module 1 carry out it is reverse osmosis, output it is pure
Water is discharged by third pipeline, and concentrated water flows out to concentrated water outlet pipe by the second port 122 and third port 123 of the first triple valve 11
Discharge.
Concentrated water outlet pipe is provided with waste water proportioner 2, for adjusting the wastewater rate of water purifier, can adjust according to the actual situation
Water quality.
The present invention realizes the switching of tap water and concentrated water by two triple valves, and at runtime, tap water can be from first
The first port 111 of triple valve 11 and second port 112 flow into film filtration module 1 and carry out reverse osmosis, and the pure water of output is by third
Pipeline discharge, concentrated water flow out to concentrated water outlet pipe by the second port 122 and third port 123 of the second triple valve 12 and are discharged, stop
When running after machine next time, tap water flows into reverse osmosis mould group from the first port 121 and second port 122 of the second triple valve 12
1 progress is reverse osmosis, and the pure water of output is discharged by third pipeline, second port 112 and third end of the concentrated water by the first triple valve 11
Mouth 113 flows out to the discharge of concentrated water outlet pipe, and it is all that tap water replaces fortune with concentrated water that 1 both ends of film filtration module, which thus may be implemented,
Capable transition, reverse osmosis membrane would not contact concentrated water in the same place always, so the risk of membrane component fouling substantially reduces,
To improve the service life of whole system.
Embodiment 2
As shown in Fig. 2, the present invention provides a kind of two way alternate formula water purification machine membrane filtration system, other features and embodiment 1
It is identical, unlike, the present embodiment realizes that 1 both ends tap water of film filtration module replaces fortune with concentrated water by four two-port valves
Row, specifically, there are two two-port valve, respectively the first two-port valve 13 and the second two-port valve 14, the second pipelines for the setting of the first pipeline
There are two triple valve, respectively third two-port valve 15 and the 4th two-port valve 16, film filtration modules 1 to pass through the first two-port valve 13 for setting
It is connected to running water pipe, film filtration module 1 is connected to by the second two-port valve 14 with concentrated water outlet pipe, and film filtration module 1 passes through the
Three two-port valves 15 are connected to water pipe, and film filtration module 1 is connected to by the 4th two-port valve 16 with concentrated water outlet pipe.
When the first pipeline is intake for tap water, the second pipeline is discharged for concentrated water, opens the first two-port valve 13 and the 4th
Two-port valve 16, closes the second two-port valve 14 and third two-port valve 15, tap water from the first two-port valve 13 enter film filtration module 1 into
Row is reverse osmosis, and the pure water of output is discharged by third pipeline, and concentrated water flows out to concentrated water outlet pipe by the 4th two-port valve 16 and is discharged.
When the first pipeline is discharged for concentrated water, the second pipeline is intake for tap water, opens the second two-port valve 14 and third
Two-port valve 15, closes the first two-port valve 13 and the 4th two-port valve 16, tap water from third two-port valve 15 enter film filtration module 1 into
Row is reverse osmosis, and the pure water of output is discharged by third pipeline, and concentrated water flows out to concentrated water outlet pipe by the second two-port valve 15 and is discharged.
The present invention realizes the switching of tap water and concentrated water by four two-port valves, and at runtime, tap water is from the first two-way
Valve enter film filtration module carry out it is reverse osmosis, the pure water of output is discharged by third pipeline, and concentrated water is flowed out to dense by the 4th two-port valve
The discharge of water outlet pipe, when running after shutdown next time, tap water enters film filtration module from third two-port valve and carries out reverse osmosis, production
Pure water out is discharged by third pipeline, and concentrated water flows out to concentrated water outlet pipe by the second two-port valve and is discharged, and film thus may be implemented
Filtration module both ends are all the transitions of tap water Yu concentrated water alternate run, and reverse osmosis membrane would not be always in the same place contact
Concentrated water, so the risk of membrane component fouling substantially reduces, to improve the service life of whole system.
Embodiment 3
The present invention provides a kind of two way alternate formula water purification machine membrane filtration system, other features are same as Example 1, different
It is that in the present embodiment, film filtration module is nanofiltration membrane group, and nanofiltration membrane group is provided with one, it should be noted that constitutes filter membrane
The quantity of the nanofiltration membrane of filter core 1 is not limited to one in the present embodiment, may be set to be multiple, such as two, three, five
, ten, 30 etc..The mounting means of nanofiltration membrane is general knowledge known in this field, and details are not described herein.
The foregoing is merely better embodiments of the invention, and the invention is not limited to above embodiment, are implementing
The structural modification small there may be part in the process, if various changes or modifications of the invention are not departed from essence of the invention
Mind and range, and belong within the scope of claim and equivalent technologies of the invention, then the present invention is also intended to encompass these changes
And modification.
Claims (10)
1. a kind of two way alternate formula water purification machine membrane filtration system, is provided with film filtration module, the film filtration module is connected with
One pipeline and the second pipeline, the pure water water outlet side of film filtration module are connected with the third pipeline for pure water discharge, and feature exists
In first pipeline is provided with tap water inlet pipe and concentrated water outlet pipe, and second pipeline is provided with tap water inlet pipe
With concentrated water outlet pipe, first pipeline realizes that film filtration module both ends first state, the second state replace fortune with the second pipeline
Row；
In first state, tap water enters film filtration module from the first pipeline, by film filtration module treated concentrated water by
The discharge of two pipelines；In the second state, tap water enters film filtration module from the second pipeline, and by film filtration module, treated
Concentrated water is discharged by the first pipeline.
2. two way alternate formula water purification machine membrane filtration system according to claim 1, which is characterized in that first pipeline is set
Be equipped with the first triple valve, the first triple valve first port be connected to running water pipe the second port of first triple valve with
The connection of film filtration module, the third port of first triple valve are connected to concentrated water outlet pipe；
Second pipeline, which is provided with, is connected with the second triple valve, and the second triple valve first port is connected to running water pipe,
The second port of second triple valve is connected to film filtration module, the third port and concentrated water outlet pipe of second triple valve
Connection.
3. two way alternate formula water purification machine membrane filtration system according to claim 2, which is characterized in that tap water is by the first pipe
Road enters film filtration module, and the concentrated water generated after the processing of film filtration module is discharged by the second pipeline, the first end of the first triple valve
Mouth is opened with second port, and the third port of the first triple valve is closed, second port and the third port opening of the second triple valve,
The first port of second triple valve is closed, and tap water flows into film filtration module from the first port and second port of the first triple valve
Carry out reverse osmosis, the pure water of output is discharged by third pipeline, and concentrated water is flowed out by the second port and third port of the second triple valve
It is discharged to concentrated water outlet pipe.
4. two way alternate formula water purification machine membrane filtration system according to claim 2, which is characterized in that tap water is by the second pipe
Road enters film filtration module, and the concentrated water generated after the processing of film filtration module is discharged by the first pipeline, the second end of the first triple valve
Mouth is opened with third port, and the first port of the first triple valve is closed, first port and the second port opening of the second triple valve,
The third port of second triple valve is closed, and tap water flows into film filtration module from the first port and second port of the second triple valve
It is filtered, the pure water of output is discharged by third pipeline, and concentrated water is flowed out to by the second port of the first triple valve with third port
The discharge of concentrated water outlet pipe.
5. two way alternate formula water purification machine membrane filtration system according to claim 1, which is characterized in that first pipeline is set
It sets there are two two-port valve, respectively the first two-port valve and the second two-port valve, there are two the second pipeline settings triple valve, difference
For third two-port valve and the 4th two-port valve.
6. two way alternate formula water purification machine membrane filtration system according to claim 5, which is characterized in that the film filtration module
It is connected to by the first two-port valve with running water pipe, the film filtration module is connected to by the second two-port valve with concentrated water outlet pipe, institute
It states film filtration module to be connected to by third two-port valve with water pipe, the film filtration module passes through the 4th two-port valve and concentrated water
Outlet pipe connection.
7. two way alternate formula water purification machine membrane filtration system according to claim 6, which is characterized in that tap water is by the first pipe
Road enters film filtration module, and the concentrated water generated after the processing of film filtration module be discharged by the second pipeline, the first two-port valve of opening and the
Four two-port valves, close the second two-port valve and third two-port valve, and tap water enters film filtration module from the first two-port valve and carries out reverse osmosis
Thoroughly, the pure water of output is discharged by third pipeline, and concentrated water flows out to concentrated water outlet pipe by the 4th two-port valve and is discharged.
8. two way alternate formula water purification machine membrane filtration system according to claim 6, which is characterized in that tap water is by the second pipe
Road enters film filtration module, and the concentrated water generated after the processing of film filtration module be discharged by the first pipeline, the second two-port valve of opening and the
Three two-port valves, close the first two-port valve and the 4th two-port valve, tap water enter film filtration module from third two-port valve and be filtered,
The pure water of output is discharged by third pipeline, and concentrated water flows out to concentrated water outlet pipe by the second two-port valve and is discharged.
9. two way alternate formula water purification machine membrane filtration system according to claim 1, which is characterized in that the film filtration module
For reverse osmosis membrane group or nanofiltration membrane group.
10. two way alternate formula water purification machine membrane filtration system according to claim 1, which is characterized in that first pipeline
Realize that film filtration module both ends first state, the second state alternate run time are less than or equal to one day with the second pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910190738.1A CN109879371A (en) | 2019-03-13 | 2019-03-13 | A kind of two way alternate formula water purification machine membrane filtration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910190738.1A CN109879371A (en) | 2019-03-13 | 2019-03-13 | A kind of two way alternate formula water purification machine membrane filtration system |
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| Publication Number | Publication Date |
|---|---|
| CN109879371A true CN109879371A (en) | 2019-06-14 |
Family
ID=66932223
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| CN201910190738.1A Pending CN109879371A (en) | 2019-03-13 | 2019-03-13 | A kind of two way alternate formula water purification machine membrane filtration system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11347375A (en) * | 1998-04-10 | 1999-12-21 | Nikkiso Co Ltd | Hollow fiber membrane filter device |
| JP2004008958A (en) * | 2002-06-07 | 2004-01-15 | Mitsubishi Rayon Eng Co Ltd | Purified water manufacturing apparatus |
| CN205873965U (en) * | 2016-07-18 | 2017-01-11 | 瀚沃环境技术(上海)有限公司 | Reverse osmosis device |
| CN207463002U (en) * | 2017-11-02 | 2018-06-08 | 汕头市汕联水处理设备有限公司 | It is a kind of can way traffic reverse osmosis water purifier |
| CN210163181U (en) * | 2019-03-13 | 2020-03-20 | 佛山市云米电器科技有限公司 | Two-way alternating water purification machine membrane filtration system |
-
2019
- 2019-03-13 CN CN201910190738.1A patent/CN109879371A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11347375A (en) * | 1998-04-10 | 1999-12-21 | Nikkiso Co Ltd | Hollow fiber membrane filter device |
| JP2004008958A (en) * | 2002-06-07 | 2004-01-15 | Mitsubishi Rayon Eng Co Ltd | Purified water manufacturing apparatus |
| CN205873965U (en) * | 2016-07-18 | 2017-01-11 | 瀚沃环境技术(上海)有限公司 | Reverse osmosis device |
| CN207463002U (en) * | 2017-11-02 | 2018-06-08 | 汕头市汕联水处理设备有限公司 | It is a kind of can way traffic reverse osmosis water purifier |
| CN210163181U (en) * | 2019-03-13 | 2020-03-20 | 佛山市云米电器科技有限公司 | Two-way alternating water purification machine membrane filtration system |
Non-Patent Citations (1)
| Title |
|---|
| 北京化工学院等编: "石油化工自动化问答", 化学工业出版社, pages: 124 * |
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Effective date of registration: 20211018 Address after: 528300 No. 2, North Xinxi 4th Road, Xiashi village, Lunjiao street, Shunde District, Foshan City, Guangdong Province (No. 1-6, north of the first floor of office building, block a, Shengda Industrial Park) Applicant after: Guangdong Chestnut Technology Co.,Ltd. Address before: 528300 Nepheline Village Committee, Lunjiao Sub-district Office, Shunde District, Foshan City, Guangdong Province Applicant before: FOSHAN VIOMI ELECTRICAL TECHNOLOGY Co.,Ltd. Applicant before: Chen Xiaoping |