CN108726638B - Water treatment system, water purifying and drinking machine and control method of water treatment system - Google Patents
Water treatment system, water purifying and drinking machine and control method of water treatment system Download PDFInfo
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- CN108726638B CN108726638B CN201810707932.8A CN201810707932A CN108726638B CN 108726638 B CN108726638 B CN 108726638B CN 201810707932 A CN201810707932 A CN 201810707932A CN 108726638 B CN108726638 B CN 108726638B
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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
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The invention discloses a water treatment system, a water purifying and drinking machine and a control method of the water treatment system. The water treatment system comprises a first reverse osmosis unit and a second reverse osmosis unit which are arranged in parallel, wherein two water inlets of the first reverse osmosis unit and the second reverse osmosis unit are arranged in parallel, two purified water outlets of the first reverse osmosis unit and the second reverse osmosis unit are arranged in parallel, a bypass branch is arranged between the purified water outlets of the first reverse osmosis unit and the water inlets of the second reverse osmosis unit, and a first control element is arranged on the bypass branch. According to the water treatment system and the water purifying and drinking machine provided by the invention, the bypass branch is arranged between the water purifying outlet of the first reverse osmosis unit and the water inlet of the second reverse osmosis unit, and the purified water generated by the first reverse osmosis unit enters the second reverse osmosis unit through the bypass branch, so that the first cup of purified water generated by the second reverse osmosis unit can be low-TDS water, and the water quality is improved.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a water treatment system, a water purifying and drinking machine and a control method of the water treatment system.
Background
With the popularization of water purification and the continuous enhancement of bacterial cognition of users, the current barrel-free large-flux machine type is widely accepted in the market.
The problem that the first cup of water is high in TDS exists in the barrenless large-flux water purifying and drinking machine in the prior art is that after the water purifying and drinking machine is closed, the two sides of the reverse osmosis membrane are respectively the mixture of raw water and concentrated water and purified water, no purified water is generated after the machine is stopped, meanwhile, water on the purified water side can pass through the reverse osmosis membrane to enter the concentrated water side under the action of forward osmosis, the water on the purified water side can become high in TDS water due to the fact that the solvent on the purified water side is reduced, and a small amount of salt solute on the concentrated water side can enter the purified water side through the reverse osmosis membrane due to the diffusion effect, so that the salt concentration on the purified water side is further increased, and the water on the purified water side is high in TDS water when the first cup of water is received.
In addition, flux can be attenuated and water yield can be significantly reduced at the later stage of use of the reverse osmosis membrane.
Disclosure of Invention
In view of the foregoing, an object of the present invention is to provide a water treatment system and a water purifying and drinking machine capable of improving the quality of a first cup of water.
In order to achieve the above purpose, on one hand, the present invention adopts the following technical scheme:
the utility model provides a water treatment system, includes parallelly connected first reverse osmosis unit and the second reverse osmosis unit that sets up, two water inlet parallelly connected settings, two water purification export parallelly connected settings of first reverse osmosis unit and second reverse osmosis unit be provided with the bypass branch road between the water inlet of first reverse osmosis unit's water purification export and second reverse osmosis unit be provided with first control element on the bypass branch road.
Preferably, the first control element comprises an on-off solenoid valve and/or a one-way valve which only allows flow from the clean water outlet of the first reverse osmosis unit to the water inlet of the second reverse osmosis unit.
Preferably, the water purifying outlet of the first reverse osmosis unit is connected with a first water purifying branch, the water purifying outlet of the second reverse osmosis unit is connected with a second water purifying branch, and the first water purifying branch and the second water purifying branch are commonly connected to a water purifying pipeline.
Preferably, a second control element is provided on the first water purification branch on the downstream side of the first reverse osmosis unit.
Preferably, the water inlet of the first reverse osmosis unit is connected with a first water inlet branch, the water inlet of the second reverse osmosis unit is connected with a second water inlet branch, and a third control element is arranged on the second water inlet branch at the upstream side of the water inlet of the second reverse osmosis unit.
Preferably, one end of the bypass branch is arranged between the purified water outlet of the first reverse osmosis unit and the second control element; and/or the number of the groups of groups,
the other end of the bypass branch is arranged between the water inlet of the second reverse osmosis unit and the third control element.
Preferably, a fourth control element is provided on the first water inlet branch.
Preferably, the second and/or third and/or fourth control element is a solenoid valve.
Preferably, the system further comprises a first concentrate discharge branch connected to the concentrate outlet of the first reverse osmosis unit; and/or the number of the groups of groups,
and the second concentrated water discharge branch is connected with the concentrated water outlet of the second reverse osmosis unit.
On the other hand, the invention adopts the following technical scheme:
a water purifier comprises the water treatment system.
In addition, the invention adopts the following technical scheme:
a control method of the water treatment system,
the water treatment system comprises a first working mode, in the first working mode, the first water inlet branch is controlled to be communicated, the second water inlet branch is cut off, the bypass branch is communicated, the first reverse osmosis unit and the second reverse osmosis unit are both in working states, the first water purification branch is controlled to be cut off, and the second water purification branch is communicated; and/or the number of the groups of groups,
the water treatment system comprises a second working mode, in the second working mode, the first water inlet branch is controlled to be cut off, the first water purifying branch is cut off, the second water inlet branch is communicated, the second water purifying branch is communicated, and the bypass branch is cut off; or controlling the second water inlet branch to cut off, the second water purifying branch to cut off, the first water inlet branch to be communicated, the first water purifying branch to be communicated and the bypass branch to cut off; and/or the number of the groups of groups,
the water treatment system comprises a third working mode, and in the third working mode, the first water inlet branch and the second water inlet branch are controlled to be communicated, the first water purification branch and the second water purification branch are communicated, and the bypass branch is controlled to be cut off.
Preferably, the water treatment system is controlled to operate in the first operating mode for a first predetermined period of time when the water treatment system is turned on; and/or the number of the groups of groups,
in the second working mode, under the condition that the first water inlet branch is closed, the first water purifying branch is closed, the second water inlet branch is communicated, the second water purifying branch is communicated, and the second reverse osmosis unit is in a working state, the water treatment system is controlled to operate in the first working mode for a second preset time period when the water treatment system is shut down.
Preferably, the water treatment system is controlled to operate in the third operating mode after the total duration of operation of the water treatment system reaches a predetermined value.
According to the water treatment system and the water purifying and drinking machine provided by the invention, the bypass branch is arranged between the water purifying outlet of the first reverse osmosis unit and the water inlet of the second reverse osmosis unit, and the purified water generated by the first reverse osmosis unit enters the second reverse osmosis unit through the bypass branch, so that the first cup of purified water generated by the second reverse osmosis unit can be low-TDS water, and the water quality is improved.
According to the control method of the water treatment system, the purified water generated by the first reverse osmosis unit is used as the water inlet of the second reverse osmosis unit, so that the first cup of purified water generated by the second reverse osmosis unit can be low-TDS water, and the control method is simple.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 shows a system diagram of a water treatment system provided by the present invention.
In the drawing the view of the figure,
1. a first reverse osmosis unit;
2. a second reverse osmosis unit;
3. a first water inlet branch; 31. a fourth control element;
4. a second water inlet branch; 41. a third control element;
5. a first water purification branch; 51. a second control element;
6. a second water purification branch;
7. a water purifying pipeline;
8. a first concentrate discharge branch; 81. a first waste water ratio solenoid valve;
9. a second concentrate discharge branch; 91. a second waste water ratio solenoid valve;
10. a bypass branch; 101. a first control element.
Detailed Description
The present invention is described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in order to avoid obscuring the present invention, and in order to avoid obscuring the present invention, well-known methods, procedures, flows, and components are not presented in detail.
Moreover, those of ordinary skill in the art will appreciate that the drawings are provided herein for illustrative purposes and that the drawings are not necessarily drawn to scale.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1, the application provides a water treatment system for a water purifying and drinking machine, including parallelly connected first reverse osmosis unit 1 and the second reverse osmosis unit 2 that set up, two water inlet parallelly connected settings, two water purification export parallelly connected settings of first reverse osmosis unit 1 and the water inlet of second reverse osmosis unit 2 be provided with bypass branch road 10 between the water purification export of first reverse osmosis unit 1 and the water inlet of second reverse osmosis unit 2 be provided with first control element 101 on bypass branch road 10, the water purification that first reverse osmosis unit 1 produced is passed through bypass branch road 10 gets into second reverse osmosis unit 2 for the first cup of water that second reverse osmosis unit 2 produced can be low TDS water, and quality of water improves.
The first control element 101 is a one-way valve, and the one-way valve only allows the purified water from the purified water outlet of the first reverse osmosis unit 1 to flow to the water inlet of the second reverse osmosis unit 2, so as to ensure that the purified water of the first reverse osmosis unit 1 can enter the second reverse osmosis unit 2, and further the purified water of the first reverse osmosis unit 1 can be utilized to flush the second reverse osmosis unit 2 until the second reverse osmosis unit 2 is full of purified water, so that the second reverse osmosis unit 2 is ensured not to generate forward osmosis, and the problem that the first cup of water TDS is higher is solved. Of course, the one-way valve may be replaced by an on-off solenoid valve.
The water purification outlet of first reverse osmosis unit 1 is connected with first water purification branch road 5, the water purification outlet of second reverse osmosis unit 2 is connected with second water purification branch road 6, first water purification branch road 5 and second water purification branch road 6 are connected to water purification pipeline 7 jointly, and in the early stage of use, the water purification that first reverse osmosis unit 1 produced can select to discharge through first water purification branch road 5 and water purification pipeline 7, the water purification that second reverse osmosis unit 2 produced is discharged through second water purification branch road 6 and water purification pipeline 7, guarantees that water treatment system can adopt multiple mode system water, satisfies different demands. In the later period of use, the first reverse osmosis unit 1 and the second reverse osmosis unit 2 can be adopted to simultaneously produce water, so that the problem of flux reduction is solved.
A second control element 51 is provided on the first water purification branch 5 on the downstream side of the first reverse osmosis unit 1, the second control element 51 preferably being a solenoid valve, the second control element 51 being capable of opening the first water purification branch 5 to allow purified water produced by the first reverse osmosis unit 1 to be discharged, the second control element 51 being capable of closing the first water purification branch 5 to allow purified water produced by the first reverse osmosis unit 5 to enter the second reverse osmosis unit 2 via a bypass branch 10, thereby allowing the second reverse osmosis unit 2 to be flushed.
The water inlet of the first reverse osmosis unit 1 is connected with a first water inlet branch 3, and a fourth control element 31 is arranged on the first water inlet branch 3. The fourth control element 31 is arranged on the upstream side of the water inlet of the first reverse osmosis unit 1, the fourth control element 31 may preferably be a solenoid valve, the fourth control element 31 being arranged to switch on or off the first water inlet branch 3, the fourth control element 31 being arranged to select whether water to be treated is purified by the first reverse osmosis unit 1.
The water inlet of the second reverse osmosis unit 2 is connected with a second water inlet branch 4, and a third control element 41 is arranged on the second water inlet branch 4 at the upstream side of the water inlet of the second reverse osmosis unit 2. The third control element 41 may preferably be a solenoid valve, the third control element 41 being adapted to switch on or off the second water inlet branch 4, the third control element 41 being adapted to select whether water to be treated is purified by the second reverse osmosis unit 2.
One end of the bypass branch 10 is disposed between the purified water outlet of the first reverse osmosis unit 1 and the second control element 51, and the other end of the bypass branch 10 is disposed between the water inlet of the second reverse osmosis unit 2 and the third control element 41, so that the purified water generated by the first reverse osmosis unit 1 flows to the second reverse osmosis unit 2 through the bypass branch 10 when the second control element 51 is closed, so as to flush the second reverse osmosis unit 2.
The water treatment system further comprises a first concentrated water discharge branch 8 connected with the concentrated water outlet of the first reverse osmosis unit 1, wherein a first wastewater ratio electromagnetic valve 81 or a first wastewater proportioner is arranged on the first concentrated water discharge branch 8 and is used for adjusting the proportion of the concentrated water discharged by the first reverse osmosis unit 1.
The water treatment system further comprises a second concentrated water discharge branch 9 connected with the concentrated water outlet of the second reverse osmosis unit 2, wherein a second wastewater electromagnetic valve 91 or a second wastewater proportional valve is arranged on the second concentrated water discharge branch 9, and the second wastewater proportional valve or the second wastewater electromagnetic valve 91 is used for adjusting the proportion of the concentrated water discharged by the second reverse osmosis unit 2.
The invention also provides a water purifier comprising the water treatment system, and the water purifier has the advantage that the TDS of the first cup of water is obviously reduced.
The invention also provides a control method of the water treatment system.
The water treatment system comprises a first working mode, in the first working mode, the first water inlet branch 3 is controlled to be communicated, the second water inlet branch 4 is cut off, the bypass branch 10 is communicated, at the moment, the fourth control element 31 is opened, the third control element 41 is closed, the first control element 101 is in an opened state, the first reverse osmosis unit 1 and the second reverse osmosis unit 2 are both in working states, the first water purification branch 5 is controlled to be cut off, the second water purification branch 6 is controlled to be communicated, and at the moment, the second control element 51 is closed.
The produced water obtained after pretreatment enters the first reverse osmosis unit 1 through the first water inlet branch 3, the purified water generated by the first reverse osmosis unit 1 enters the second reverse osmosis unit 2 through the bypass branch 10, the concentrated water generated by the second reverse osmosis unit 2 is discharged through the second concentrated water discharge branch 9, and the purified water generated by the second reverse osmosis unit 2 is discharged through the second purified water branch 6 and the purified water pipeline 7, so that the second reverse osmosis unit 2 is filled with the purified water, the problem of forward osmosis cannot occur, and the problem that the first cup of water is high in TDS water is solved.
The water treatment system comprises a second working mode, in the second working mode, the first water inlet branch 3 is controlled to be cut off, the first water purifying branch 5 is controlled to be cut off, the second water inlet branch 4 is communicated, the second water purifying branch 6 is communicated, the bypass branch 10 is controlled to be cut off, at the moment, the fourth control element 31 is closed, the second control element 51 is closed, the third control element 41 is opened, the first control element 101 is in a closed state, and the second reverse osmosis unit 2 is in a single working state; or, the second water inlet branch 4 is controlled to be cut off, the second water purifying branch 6 is controlled to be cut off, the first water inlet branch 3 is communicated, the first water purifying branch 5 is communicated, the bypass branch 10 is controlled to be cut off, at the moment, the fourth control element 31 is opened, the second control element 51 is opened, the third control element 41 is closed, the first control element 101 is in a closed state, and the first reverse osmosis unit 1 is in a single working state.
The produced water obtained after pretreatment enters the first reverse osmosis unit 1 through the first water inlet branch 3, the concentrated water is discharged through the first concentrated water discharge branch 8, and the purified water is discharged through the first purified water branch 5 and the purified water pipeline 7. When the water treatment system is started, the water treatment system is controlled to run for a preset time in the first working mode, so that the first cup of high TDS water generated by the first reverse osmosis unit 1 is filtered again by the second reverse osmosis unit 2, and the first cup of water obtained on the water purification pipeline 7 is low TDS water. And when the first working mode is operated and then the second working mode is operated, and the second reverse osmosis unit 2 is adopted to prepare water, the purified water generated by the first reverse osmosis unit 1 is low TDS water. Preferably, the first predetermined time period is 60s.
Or, the produced water obtained after pretreatment enters the second reverse osmosis unit through the second water inlet branch 4, the concentrated water is discharged through the second concentrated water discharge branch 9, and the purified water is discharged through the second purified water branch 6 and the purified water pipeline 7. When the first water inlet branch 3 is closed, the first water purifying branch 5 is closed, the second water inlet branch 4 is communicated, the second water purifying branch 6 is communicated, and the second reverse osmosis unit 2 is in a working state, the water treatment system is controlled to operate in the first working mode for a second preset time period when the water treatment system is shut down. After the operation in the first working mode, the second reverse osmosis unit 2 is filled with pure water, and then the second working mode is started to directly operate after starting up, the second reverse osmosis unit 2 is adopted to produce water, and the produced first cup of water is low-TDS water. Preferably, the second predetermined time period is 60s.
The water treatment system comprises a third working mode, in the third working mode, the first water inlet branch 3 and the second water inlet branch 4 are controlled to be communicated, at the moment, the fourth control element 31 is opened, the third control element 41 is opened, the first water purifying branch 5 and the second water purifying branch 6 are communicated, the second control element 51 is opened, the bypass branch 10 is controlled to be closed, and the first control element 101 is closed.
The produced water obtained after pretreatment enters the first reverse osmosis unit 1 through the first water inlet branch 3 and enters the second reverse osmosis unit 2 through the second water inlet branch 4, the concentrated water generated by the first reverse osmosis unit 1 is discharged through the first concentrated water discharge branch 8, the concentrated water generated by the second reverse osmosis unit 2 is discharged through the second concentrated water discharge branch 9, the purified water generated by the first reverse osmosis unit 1 is discharged through the first purified water branch 5 and the purified water pipeline 7, the purified water generated by the second reverse osmosis unit 2 is discharged through the second purified water branch 6 and the purified water pipeline 7, and the water obtained after pretreatment is treated through the first reverse osmosis unit 1 and the second reverse osmosis unit 2 in the later period of use, so that the problem of flux reduction in the later period of use is solved, and the water amount obtained on the purified water pipeline 7 is not reduced.
When the third working mode finishes water production, the water treatment system is controlled to operate according to the first working mode, the second reverse osmosis unit 2 is flushed with purified water generated by the first reverse osmosis unit 1, so that the second reverse osmosis unit 2 is filled with purified water and forward osmosis does not occur, and further when the third working mode finishes water production, the first cup of water is mixed water of low TDS water generated by the second reverse osmosis unit 2 and high TDS water generated by the first reverse osmosis unit 1, the first cup of water is lower TDS water, and the problem that the TDS of the first cup of water is higher is solved.
Preferably, after the total operation duration of the water treatment system reaches a predetermined value, the water treatment system is controlled to operate in the third working mode, and when the total operation duration of the water treatment system reaches the predetermined value, the flux of the first reverse osmosis unit 1 and the second reverse osmosis unit 2 is attenuated, and the problem of flux attenuation caused by filtering of a single reverse osmosis unit can be solved by using the third working mode.
It is easy to understand by those skilled in the art that the above preferred embodiments can be freely combined and overlapped without conflict.
It will be understood that the above-described embodiments are merely illustrative and not restrictive, and that all obvious or equivalent modifications and substitutions to the details given above may be made by those skilled in the art without departing from the underlying principles of the invention, are intended to be included within the scope of the appended claims.
Claims (7)
1. The water treatment system is characterized by comprising a first reverse osmosis unit and a second reverse osmosis unit which are arranged in parallel, wherein two water inlets of the first reverse osmosis unit and the second reverse osmosis unit are arranged in parallel, two purified water outlets of the first reverse osmosis unit and the second reverse osmosis unit are arranged in parallel, a bypass branch is arranged between the purified water outlets of the first reverse osmosis unit and the water inlets of the second reverse osmosis unit, and a first control element is arranged on the bypass branch; the first control element only allows flow from the clean water outlet of the first reverse osmosis unit to the water inlet of the second reverse osmosis unit;
the water purifying outlet of the first reverse osmosis unit is connected with a first water purifying branch, the water purifying outlet of the second reverse osmosis unit is connected with a second water purifying branch, and the first water purifying branch and the second water purifying branch are commonly connected to a water purifying pipeline;
a second control element is arranged on the first water purifying branch and on the downstream side of the first reverse osmosis unit;
the water inlet of the first reverse osmosis unit is connected with a first water inlet branch, the water inlet of the second reverse osmosis unit is connected with a second water inlet branch, and a third control element is arranged on the second water inlet branch at the upstream side of the water inlet of the second reverse osmosis unit;
one end of the bypass branch is arranged between a purified water outlet of the first reverse osmosis unit and a second control element; the other end of the bypass branch is arranged between the water inlet of the second reverse osmosis unit and the third control element;
a fourth control element is arranged on the first water inlet branch;
the water treatment system comprises a first working mode, a second working mode and a third working mode;
in the first working mode, the first water inlet branch is communicated, the second water inlet branch is cut off, the bypass branch is communicated, the first reverse osmosis unit and the second reverse osmosis unit are in working states, the first water purifying branch is cut off, and the second water purifying branch is communicated;
in the second working mode, the first water inlet branch is cut off, the first water purifying branch is cut off, the second water inlet branch is communicated, the second water purifying branch is communicated, and the bypass branch is cut off; or the second water inlet branch is cut off, the second water purifying branch is cut off, the first water inlet branch is communicated, the first water purifying branch is communicated, and the bypass branch is cut off;
in the third working mode, the first water inlet branch is communicated with the second water inlet branch, the first water purifying branch is communicated with the second water purifying branch, and the bypass branch is cut off.
2. The water treatment system of claim 1, wherein the first control element comprises an on-off solenoid valve and/or a one-way valve.
3. The water treatment system according to claim 1, wherein the second and/or third and/or fourth control element is a solenoid valve.
4. A water treatment system according to any one of claims 1 to 3, wherein,
the first concentrated water discharge branch is connected with the concentrated water outlet of the first reverse osmosis unit; and/or the number of the groups of groups,
and the second concentrated water discharge branch is connected with the concentrated water outlet of the second reverse osmosis unit.
5. A water purifier comprising the water treatment system of any one of claims 1-4.
6. A method of controlling a water treatment system as claimed in any one of claims 1 to 4, wherein the water treatment system is controlled to operate in the first mode of operation for a first predetermined period of time when the water treatment system is on; and/or the number of the groups of groups,
in the second working mode, under the condition that the first water inlet branch is closed, the first water purifying branch is closed, the second water inlet branch is communicated, the second water purifying branch is communicated, and the second reverse osmosis unit is in a working state, the water treatment system is controlled to operate in the first working mode for a second preset time period when the water treatment system is shut down.
7. The control method of claim 6, wherein the water treatment system is controlled to operate in the third mode of operation after a total duration of operation of the water treatment system reaches a predetermined value.
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| CN109336305B (en) * | 2018-11-30 | 2023-10-27 | 佛山市云米电器科技有限公司 | Time-delay stop type household water purifying device and household water purifier |
| CN110255737A (en) * | 2019-06-26 | 2019-09-20 | 浙江艾波特环保科技股份有限公司 | A kind of water purifier and method with pure water displacement concentrated water |
| CN110342667A (en) * | 2019-08-05 | 2019-10-18 | 浙江艾波特环保科技股份有限公司 | A kind of water purifier and method reducing pure water TDS value |
| CN110642330A (en) * | 2019-09-05 | 2020-01-03 | 浙江艾波特环保科技股份有限公司 | Prevent purifier that TDS value risees |
| CN111186879A (en) * | 2020-01-16 | 2020-05-22 | 深圳市优美环境治理有限公司 | Double-pump double-membrane reverse osmosis equipment and water treatment method |
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