CN109569306A - Reverse osmosis membrane flush control method and reverse osmosis membrane rinse-system - Google Patents
Reverse osmosis membrane flush control method and reverse osmosis membrane rinse-system Download PDFInfo
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- CN109569306A CN109569306A CN201910063287.5A CN201910063287A CN109569306A CN 109569306 A CN109569306 A CN 109569306A CN 201910063287 A CN201910063287 A CN 201910063287A CN 109569306 A CN109569306 A CN 109569306A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/10—Accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/12—Controlling or regulating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/40—Automatic control of cleaning processes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nanotechnology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention relates to a kind of reverse osmosis membrane flush control method and reverse osmosis membrane rinse-systems, wherein reverse osmosis membrane flush control method, the following steps are included: S1, transmission execute the first instruction for rinsing state, rinsed so that flushing water is filled the water along first direction to the raw water side form face of reverse osmosis membrane；S2, the instruction for executing the second flushing state is sent, is rinsed so that flushing water is filled the water to the raw water side form face of reverse osmosis membrane in a second direction, wherein the second direction and first direction be not in the same direction；Successively it is alternately repeated the above S1 and S2 step.By the way that in two different directions, i.e. first direction and second direction is filled the water to the raw water side form face of the reverse osmosis membrane and rinsed, so that changing flushing water during the rinsing process improves flushing effect to the direction of washing away on reverse osmosis membrane surface.
Description
Technical field
The present invention relates to water purification fields, rinse system more particularly to a kind of reverse osmosis membrane flush control method and reverse osmosis membrane
System.
Background technique
During water purification, impurity is filtered in the raw water side form face of reverse osmosis membrane water purifier.With using the time
Passage, the raw water side form face gradually fouling of reverse osmosis membrane influence reverse osmosis purifying water effect.Therefore, it is necessary to can periodically give reverse osmosis
Permeable membrane is rinsed, and clears up the dirt in raw water side form face.General backwashing manner is intake in raw water inlet, to reverse osmosis membrane
It is rinsed, but the flushing effect that such mode can reach is poor.
Summary of the invention
Based on this, it is necessary to a kind of reverse osmosis membrane flush control method and reverse osmosis membrane rinse-system are provided, it is anti-to improve
The flushing effect of permeable membrane.
A kind of reverse osmosis membrane flush control method, comprising the following steps:
S1, it sends and executes the first instruction for rinsing state, so that flushing water is along first direction to the raw water side of reverse osmosis membrane
Film surface water filling is rinsed；
S2, the instruction for executing the second flushing state is sent, so that flushing water is in a second direction to the raw water side of reverse osmosis membrane
Film surface water filling is rinsed, wherein the second direction and first direction be not in the same direction；
Successively it is alternately repeated the above S1 and S2 step.
Above scheme provides a kind of reverse osmosis membrane flush control method, by send execute first rinse status command and
It executes second and rinses status command, in two different directions, the i.e. raw water of first direction and second direction to the reverse osmosis membrane
The water filling of side form face is rinsed, and is improved to the direction of washing away on reverse osmosis membrane surface to change flushing water during the rinsing process and is rinsed effect
Fruit.It avoids rinsing in one direction always, causes reverse osmosis membrane to only have the flushing effect of a fragment position preferable always, other positions
The case where being unable to get preferable flushing generation.
The water (flow) direction when first direction is water purification in raw water runner in one of the embodiments, described second
Direction is opposite to the first direction.
The reverse osmosis membrane flush control method in one of the embodiments, further comprising the steps of:
Runoff investigation instruction is sent, the water for adjusting the flushing water for rinsing reverse osmosis membrane along the first direction is big
It is small, and/or for adjusting the water size for rinsing the flushing water of reverse osmosis membrane along the second direction.
The reverse osmosis membrane flush control method in one of the embodiments, further comprising the steps of:
State duration T1 and second is rinsed according to preset first and rinses state duration T2, and rate-determining steps S1 continues T1 duration
After close the step, rate-determining steps S2 closes the step after continuing T2 duration.
It is further comprising the steps of before being rinsed in one of the embodiments:
The flushing water for rinsing the reverse osmosis membrane along the first direction enters from the first water filling port, wherein first note
The mouth of a river is the opening for being arranged between the raw water inlet of raw water runner and concentrated water water outlet and being connected with raw water runner；
The flushing water for rinsing the reverse osmosis membrane along the second direction enters from the second water filling port, wherein second note
The mouth of a river is the opening for being arranged between the raw water inlet of raw water runner and concentrated water water outlet and being connected with raw water runner, described
Water (flow) direction when one water filling port and second water filling port are along raw water runner water purification is successively spaced setting.
The reverse osmosis membrane flush control method in one of the embodiments, further comprising the steps of:
Position regulating command is sent, for adjusting first water filling port and second water filling port in the raw water runner
The position in water (flow) direction when water purification.
First water filling port and second water filling port are adjusted according to position regulating command in one of the embodiments,
The specific steps of position are as follows:
The fouling severity of each position on the reverse osmosis membrane is detected, to obtain fouling critical regions；
The position that first water filling port and/or second water filling port are adjusted according to the above testing result, so that described
First water filling port and second water filling port are located at the two sides of fouling critical regions.
A kind of reverse osmosis membrane rinse-system, including reverse-osmosis membrane element, reverse osmosis membrane in the reverse-osmosis membrane element
Flushing process is controlled by above-mentioned reverse osmosis membrane flush control method.
Above scheme provides a kind of reverse osmosis rinse-system, mainly by using any of the above-described as described in the examples anti-
Permeable membrane flush control method controls the flushing process of the reverse-osmosis membrane element, enables the reverse-osmosis membrane element
Preferable flushing is accessed, flushing effect is preferable.
The reverse osmosis membrane rinse-system in one of the embodiments, further includes rinsing water circuit system, the flushing water
Road system is connected to the reverse-osmosis membrane element, enters the reverse-osmosis membrane element for controlling the flushing water in external source,
The reverse osmosis membrane of the reverse-osmosis membrane element is successively rinsed from the first direction and the second direction.
The reverse-osmosis membrane element is coiled reverse osmosis membrane element in one of the embodiments, and the rolling is reverse osmosis
One end face of membrane component is equipped with the first water filling port, another end face of the coiled reverse osmosis membrane element is equipped with the second water filling
Mouthful, the water injected from first water filling port rinses the raw water side form face of the reverse osmosis membrane along first direction, from described second
The water of water filling port injection rinses the raw water side form face of the reverse osmosis membrane in a second direction.
Detailed description of the invention
Fig. 1 is the schematic diagram that state is rinsed described in step S1；
Fig. 2 is the schematic diagram that state is rinsed described in step S2；
Fig. 3 is the expanded view of reverse-osmosis membrane element described in the present embodiment.
Description of symbols:
10, reverse-osmosis membrane element, 11, reverse osmosis membrane, 111, raw water side form face, 112, pure water side form face, the 12, first water filling
Mouthful, the 13, second water filling port, 14, raw water inlet, 15, concentrated water water outlet.
Specific embodiment
A kind of reverse osmosis membrane flush control method is provided in one embodiment, comprising the following steps:
S1, it sends and executes the first instruction for rinsing state, so that flushing water is along first direction to the raw water side of reverse osmosis membrane
Film surface water filling is rinsed；
S2, the instruction for executing the second flushing state is sent, so that flushing water is in a second direction to the raw water side of reverse osmosis membrane
Film surface water filling is rinsed, wherein the second direction and first direction be not in the same direction；
Successively it is alternately repeated the above S1 and S2 step.
Above scheme provides a kind of reverse osmosis membrane flush control method, by send execute first rinse status command and
It executes second and rinses status command, in two different directions, the i.e. original of first direction and second direction to the reverse osmosis membrane 11
The water filling of water side form face 111 is rinsed, so that constantly changing flushing water during the rinsing process washes away direction to 11 surface of reverse osmosis membrane,
And then improve flushing effect.It avoids rinsing in one direction always, reverse osmosis membrane 11 is caused there was only the flushing of a fragment position always
The case where effect is preferable, and other positions are unable to get preferable flushing generation.Raw water side form described herein face 111 refers in reverse osmosis
It is used to form the film surface of raw water runner in permeable membrane, is in contrast pure by the film surface for being used to form pure water runner on reverse osmosis membrane
Moisture film face.
It specifically, can be by the way that original raw water inlet 14 and concentrated water water outlet 15 as flushing water inlet or be gone out
Mouthful realize flushing process, can also by separately setting two water filling ports, switch two water filling ports respectively as rinse water inlet or
Person outlet, realizes the switching that first direction rinses and second direction is rinsed.
For example, as shown in Figure 1, it is assumed that two water filling ports are respectively the first water filling port 12 and the second water filling port 13, in step
When S1 is implemented, control system controls extraneous water route system acting, so that import of first water filling port 12 as flushing water, institute
State outlet of second water filling port 13 as flushing water.As shown in Fig. 2, control system controls extraneous water route when step S2 is implemented
System acting, so that import of second water filling port 13 as flushing water, first water filling port 12 goes out as flushing water
Mouthful.When rinsing, control system, which is constantly alternately sent, to be executed the first flushing state and executes the second instruction for rinsing state, thus
Constantly switch the import or export of first water filling port 12 and second water filling port 13 as flushing water.
Further, in one embodiment, when being equipped with the first water filling port 12 and the second water filling port 13, in implementation steps
When S1, outlet of second water filling port 13 as flushing water is not necessarily used, concentrated water water outlet 15 or original can also be used
Outlet of the water water inlet 14 as flushing water, step S2 is similarly.
For example, as shown in figure 3, when first water filling port 12 is between the second water filling port 13 and raw water inlet 14
When, in implementation steps S1, first water filling port 12 is adjusted under the instruction control of control system and is rushed by extraneous water circuit system
The import of wash water, outlet of the concentrated water water outlet 15 of the raw water runner as flushing water；In implementation steps S2, described second
Import of the water filling port 13 as flushing water, outlet of the raw water inlet 14 of the raw water runner as flushing water.In this way, in step
When rapid S1 and step S2 is successively alternately repeated, the side of washing away of the reverse osmosis membrane 11 between the first water filling port 12 and the second water filling port 13
To constantly changing, to effectively improve flushing effect.
Specifically, in one embodiment, the water (flow) direction when first direction is water purification in raw water runner, described the
Two directions are opposite to the first direction.That is, reverse osmosis membrane 11 is by two during step S1 and S2 are constantly alternately repeated
The water flow of different directions is alternately rinsed, and the dirt on reverse osmosis membrane 11 can be effectively removed, and improves flushing effect.
Further, in one embodiment, the reverse osmosis membrane flush control method, further comprising the steps of:
Runoff investigation instruction is sent, the water for adjusting the flushing water for rinsing reverse osmosis membrane 11 along the first direction is big
It is small, and/or adjust the water size that the flushing water of reverse osmosis membrane 11 is rinsed along the second direction.
By sending runoff investigation instruction, changes the water size of flushing water, the dirt on 11 surface of reverse osmosis membrane is played
Intermittent impacts further increase flushing effect.
Further, in one embodiment, the reverse osmosis membrane flush control method, further comprising the steps of:
State duration T1 and second is rinsed according to preset first and rinses state duration T2, and rate-determining steps S1 continues T1 duration
After close the step, rate-determining steps S2 closes the step after continuing T2 duration.
Based on have in first direction and second direction one it is substantially uniform with water purification water (flow) direction during water production, another is then
It is substantially opposite.Assuming that first direction and water purification water (flow) direction during water production are substantially uniform, second direction and first direction are on the contrary, dirt
Dirt is formed when water flow flows generally in a first direction, therefore the scale removal effect relative mistake one of the flushing on first direction
A bit, the flushing effect and in second direction is then relatively good.If but only rinse in one direction over time, with
Flushing advantage in upper second direction can weaken gradually.Therefore to improve whole flushing effect, according to the reality of dirt formation
Situation adjusts the size of the T1 and T2, and dirt is more efficiently removed.Specifically, preset first punching
Washing the flushing of state duration T1 and second state duration T2 can be the duration that user is set according to actual conditions in advance.Control system
Then according to the duration of preset duration regulating step S1 and step S2.
Further, in one embodiment, the flushing water of the reverse osmosis membrane is rinsed along the first direction from first
Water filling port enter, wherein first water filling port be arranged between the raw water inlet of raw water runner and concentrated water water outlet and with
The opening of raw water runner conducting；
The flushing water for rinsing the reverse osmosis membrane along the second direction enters from the second water filling port, wherein second note
The mouth of a river is the opening for being arranged between the raw water inlet of raw water runner and concentrated water water outlet and being connected with raw water runner, described
Water (flow) direction when one water filling port and second water filling port are along raw water runner water purification is successively spaced setting.
The entrance for realizing flushing process in first direction and second direction is that first note is separately set on raw water runner
The mouth of a river 12 and the second water filling port 13.And separately set based on first water filling port 12 and second water filling port 13, therefore
The position of first water filling port 12 and the second water filling port 13 can be arranged according to the actual situation, and flexibility is higher.
For example, in one embodiment, the reverse osmosis membrane flush control method is further comprising the steps of:
Position regulating command is sent, for adjusting first water filling port 12 and second water filling port 13 in the raw water
The position in water (flow) direction when runner water purification.
So that the position of first water filling port 12 and the position of second water filling port 13 can meet reverse osmosis membrane
The flushing demand of fouling condition on 11.First water filling port 12 and second water filling port 13 can be specifically arranged at one
On the slide plate that can be slided, the slide plate can slide in the water (flow) direction of raw water runner, send when receiving control system
Position regulating command when, slide plate is then mobile according to default rule, to adjust first water filling port 12 and second note
Position of the mouth of a river 13 in the water (flow) direction in the raw water runner water purification.Or it is set in the water (flow) direction of the raw water runner
Multiple water filling ports, the corresponding label of each water filling port are set, position regulating command then passes through transmission not isolabeling, and instruction switching is not
The entrance of same water filling port flushing water the most, to realize first water filling port 12 and second water filling port 13 in the original
The adjusting of position in water (flow) direction when water flow passage water purification.
Further, in one embodiment, first water filling port and described second are adjusted according to position regulating command
The specific steps of water filling port position are as follows:
The fouling severity of each position on the reverse osmosis membrane 11 is detected, to obtain fouling critical regions；
The position of first water filling port 12 and/or second water filling port 13 is adjusted according to the above testing result, so that
First water filling port 12 and second water filling port 13 are located at the two sides of fouling critical regions.
To targetedly be rinsed to fouling critical regions, flushing effect is improved.When rinsing beginning, close to concentrated water
Fouling condition at water outlet 15 is relatively serious, therefore, at this time by first water filling port 12 and second water filling port
13 are adjusted in the position close to concentrated water water outlet 15, adjust first water filling port 12 and described second according to testing result later
The flushing of 11 various pieces of reverse osmosis membrane is targetedly completed in the position of water filling port 13.
Further, a kind of 11 rinse-system of reverse osmosis membrane, including reverse osmosis membrane element are provided in another embodiment
Part 10, the flushing process of the reverse osmosis membrane 11 in the reverse-osmosis membrane element 10 by above-mentioned reverse osmosis membrane flush control method into
Row control.
Above scheme provides a kind of reverse osmosis rinse-system, mainly by using any of the above-described as described in the examples anti-
Permeable membrane flush control method controls the flushing process of the reverse-osmosis membrane element 10, so that the reverse-osmosis membrane element
10 can preferably be rinsed, and flushing effect is preferable.
Further, in one embodiment, 11 rinse-system of reverse osmosis membrane further includes rinsing water circuit system, institute
It states flushing water circuit system to be connected to the reverse-osmosis membrane element 10, for controlling the flushing water in external source into the reverse osmosis
Membrane element 10 successively rinses the reverse osmosis membrane of the reverse-osmosis membrane element 10 from the first direction and the second direction
11.By the control for rinsing water circuit system, being alternately repeated for the step S1 and step S2 is realized, complete flushing process.
Further, in one embodiment, the reverse-osmosis membrane element 10 is coiled reverse osmosis membrane element, the rolling
One end face of reverse-osmosis membrane element is equipped with the first water filling port 12, and another end face of the coiled reverse osmosis membrane element is equipped with the
Two water filling ports 13, the water injected from first water filling port 12 rinse the raw water side form face of the reverse osmosis membrane 11 along first direction
111, the water injected from second water filling port 13 rinses the raw water side form face 111 of the reverse osmosis membrane 11 in a second direction.It can
Selection of land, first water filling port 12 and second water filling port 13 can also be located at the same of the coiled reverse osmosis membrane element 10
A end face.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of reverse osmosis membrane flush control method, which comprises the following steps:
S1, it sends and executes the first instruction for rinsing state, so that flushing water is along first direction to the raw water side form face of reverse osmosis membrane
Water filling is rinsed；
S2, the instruction for executing the second flushing state is sent, so that flushing water is in a second direction to the raw water side form face of reverse osmosis membrane
Water filling is rinsed, wherein the second direction and first direction be not in the same direction；
Successively it is alternately repeated the above S1 and S2 step.
2. reverse osmosis membrane flush control method according to claim 1, which is characterized in that the first direction is raw water stream
Water (flow) direction in road when water purification, the second direction are opposite to the first direction.
3. reverse osmosis membrane flush control method according to claim 1, which is characterized in that further comprising the steps of:
Send runoff investigation instruction, for adjusts along the first direction flushing reverse osmosis membrane flushing water water size, and/
Or for adjusting the water size for rinsing the flushing water of reverse osmosis membrane along the second direction.
4. reverse osmosis membrane flush control method according to claim 1, which is characterized in that further comprising the steps of:
State duration T1 and second is rinsed according to preset first and rinses state duration T2, and rate-determining steps S1 is closed after continuing T1 duration
The step is closed, rate-determining steps S2 closes the step after continuing T2 duration.
5. reverse osmosis membrane flush control method according to any one of claims 1 to 4, which is characterized in that
The flushing water for rinsing the reverse osmosis membrane along the first direction enters from the first water filling port, wherein first water filling port
For the opening for being arranged between the raw water inlet of raw water runner and concentrated water water outlet and being connected with raw water runner；
The flushing water for rinsing the reverse osmosis membrane along the second direction enters from the second water filling port, wherein second water filling port
For the opening for being arranged between the raw water inlet of raw water runner and concentrated water water outlet and being connected with raw water runner, first note
The water (flow) direction when mouth of a river and second water filling port are along raw water runner water purification is successively spaced setting.
6. reverse osmosis membrane flush control method according to claim 5, which is characterized in that further comprising the steps of:
Position regulating command is sent, for adjusting first water filling port and second water filling port in the raw water runner water purification
When water (flow) direction on position.
7. reverse osmosis membrane flush control method according to claim 6, which is characterized in that adjusted according to position regulating command
The specific steps of first water filling port and second water filling port position are as follows:
The fouling severity of each position on the reverse osmosis membrane is detected, to obtain fouling critical regions；
The position of first water filling port and/or second water filling port is adjusted according to the above testing result, so that described first
Water filling port and second water filling port are located at the two sides of fouling critical regions.
8. a kind of reverse osmosis membrane rinse-system, which is characterized in that anti-in the reverse-osmosis membrane element including reverse-osmosis membrane element
The flushing process of permeable membrane reverse osmosis membrane flush control method as described in any one of claims 1 to 7 is controlled.
9. reverse osmosis membrane rinse-system according to claim 8, which is characterized in that it further include rinsing water circuit system, it is described
It rinses water circuit system to be connected to the reverse-osmosis membrane element, for controlling the flushing water in external source into the reverse osmosis membrane
Element successively rinses the reverse osmosis membrane of the reverse-osmosis membrane element from the first direction and the second direction.
10. reverse osmosis membrane rinse-system according to claim 8 or claim 9, which is characterized in that the reverse-osmosis membrane element is volume
One end face of formula reverse-osmosis membrane element, the coiled reverse osmosis membrane element is equipped with the first water filling port, the coiled reverse osmosis membrane
Another end face of element is equipped with the second water filling port, and the water injected from first water filling port rinses the reverse osmosis along first direction
The raw water side form face of permeable membrane, the water injected from second water filling port rinse the raw water side form of the reverse osmosis membrane in a second direction
Face.
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| CN103446886A (en) * | 2012-06-01 | 2013-12-18 | 珠海格力电器股份有限公司 | Flushable external pressure type ultrafiltration filter core assembly and water purifier |
| CN202962281U (en) * | 2012-12-25 | 2013-06-05 | 四川宜科纯水设备有限公司 | Flushing system for reverse osmosis membrane assembly in water purification machine |
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| CN106178955A (en) * | 2016-07-21 | 2016-12-07 | 珠海格力电器股份有限公司 | A kind of water purifier purging method and device |
| CN106277211A (en) * | 2016-10-17 | 2017-01-04 | 珠海格力电器股份有限公司 | A kind of water purifier and control method thereof |
| CN106693709A (en) * | 2017-02-10 | 2017-05-24 | 珠海格力电器股份有限公司 | Water purification system and control method thereof and water purifier |
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| CN108217844A (en) * | 2018-03-27 | 2018-06-29 | 蒋志远 | A kind of water purification machine is positive and negative to rinse membranous system and control method |
| CN109078499A (en) * | 2018-09-07 | 2018-12-25 | 江苏沁尔康环境电器有限公司 | A method of with rolled membrane module strainability can be restored on household water-purifying machine |
| CN109110877A (en) * | 2018-09-07 | 2019-01-01 | 珠海格力电器股份有限公司 | Water purification system, urea machine and water purification control method |
| CN109179579A (en) * | 2018-10-17 | 2019-01-11 | 珠海格力电器股份有限公司 | Coiled reverse osmosis membrane filter core and anti-penetration water purifier |
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