CN110404414A - A kind of water purifier control method and water purifier - Google Patents
A kind of water purifier control method and water purifier Download PDFInfo
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- CN110404414A CN110404414A CN201810393862.3A CN201810393862A CN110404414A CN 110404414 A CN110404414 A CN 110404414A CN 201810393862 A CN201810393862 A CN 201810393862A CN 110404414 A CN110404414 A CN 110404414A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 244
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 110
- 239000012528 membrane Substances 0.000 claims abstract description 104
- 239000002351 wastewater Substances 0.000 claims abstract description 58
- 230000001105 regulatory effect Effects 0.000 claims abstract description 55
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 230000033228 biological regulation Effects 0.000 claims description 18
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000000746 purification Methods 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 206010020852 Hypertonia Diseases 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- B01D2321/02—Forward flushing
-
- 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
- C02F2209/02—Temperature
-
- 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
- C02F2209/03—Pressure
-
- 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]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
Abstract
The invention discloses a kind of water purifier control method and water purifier, control method is the following steps are included: water temperature and quality detecting step: detection raw water temperature T, raw water quality TDS；Waste water ratio regulating step: the aperture of wastewater valve is adjusted according to raw water temperature T detected and raw water quality TDS；Pressure detecting step before film: pressure P before the film of reverse osmosis membrane is detected；Booster pump regulating step: the revolving speed of booster pump is adjusted according to pressure P before the film of reverse osmosis membrane detected.Water purifier control method of the invention, by detecting raw water temperature T, raw water quality TDS, rationally adjust the waste water ratio to match with the operating condition, the revolving speed for adjusting booster pump according to pressure before film simultaneously selects suitable waste water ratio under the premise of pressure before guaranteeing film is stablized, improve water yield, water resource waste is reduced, pressure before film is stabilized, water noise processed accordingly reduces.
Description
Technical field
The present invention relates to technical field of water purification, specifically, being to be related to a kind of water purifier control method and water purifier.
Background technique
Reverse osmosis water purification units are the mainstream types of domestic Domestic water purifying product, in order to guarantee the use longevity of reverse osmosis filter core
Life, in use, it is necessary to ceaselessly reverse osmosis membrane surface is rinsed, the salinity on reverse osmosis membrane surface is reduced, subtract
It is blocked caused by slow film surface fouling.Under the premise of guaranteeing reverse osmosis membrane service life, water purification producing water ratio is improved, is reduced to the greatest extent
Concentrated water discharge is the common objective of industry.But it is fixed pure water producing water ratio that reverse osmosis water purifier currently on the market is substantially mostly,
The service life of the case where not being able to satisfy different regions water quality, reverse osmosis filter core also differs greatly.
Due to the pure water producing water ratio of reverse osmosis membrane influenced by inflow temperature it is very big, when inflow temperature is lower than certain temperature
When, the pure water producing water ratio of reverse osmosis water purification units can degradation.In addition reverse osmosis water purification units are simultaneously by water quality impact, low
The regional water purifier using fixed waste water ratio of temperature, water quality inferiority, the non-adjustable hypertonia before will lead to reverse osmosis membrane of waste water ratio make
Putamina is run in a high voltage state, and complete machine noise is excessively high, and user experience is very poor.To reverse osmosis when hypertonia before reverse osmosis membrane
Permeable membrane causes serious harm, and shortens its service life.
Summary of the invention
The present invention is non-adjustable in order to solve existing reverse osmosis water purification units waste water ratio, in different quality area or difference
The technical issues of for temperature environment in use, water yield is be easy to cause to decline, water noise processed is high, shortens reverse osmosis membrane service life,
A kind of water purifier control method is proposed, can solve the above problem.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following scheme:
A kind of water purifier control method, comprising the following steps:
Water temperature and quality detecting step: detection raw water temperature T, raw water quality TDS；
Waste water ratio regulating step: the aperture of wastewater valve is adjusted according to raw water temperature T detected and raw water quality TDS；
Pressure detecting step before film: pressure P before the film of reverse osmosis membrane is detected；
Booster pump regulating step: the revolving speed of booster pump is adjusted according to pressure P before the film of reverse osmosis membrane detected.
Further, in booster pump regulating step, by pressure P before the film of reverse osmosis membrane compared with given threshold Z1, if instead
Pressure P >=Z1 before the film of permeable membrane, then reduce the revolving speed of booster pump, wherein Z1 > 0.
Further, the revolving speed of booster pump has multi gear, pressure value is divided into multiple interval ranges, each section model
The wherein one grade of revolving speed for enclosing corresponding booster pump judges the interval range that pressure P is fallen into before the film of reverse osmosis membrane, and according to the area
Between booster pump corresponding to range rotational speed regulation booster pump.
Further, pressure detecting step periodically before execution film, if pressure P < Z1 before the film of reverse osmosis membrane, is pressurized
Pump keeps current rotating speed.
Further, after the revolving speed for reducing primary or multiple booster pump, if being pressed before the film of current reverse osmosis membrane
Power P >=Z1, then execute circling water flow rate regulating step, and the concentrated water spout of reverse osmosis membrane wherein connect shape with the prime of reverse osmosis membrane all the way
At return water branch, circling water flow rate regulating valve is provided in return water branch, by reverse osmosis membrane when the circling water flow rate regulating valve is opened
Concentrated water spout to the prime one-way conduction of the reverse osmosis membrane, the circling water flow rate regulating step includes:
It opens the circling water flow rate regulating valve or tunes up the aperture of the circling water flow rate regulating valve.
Further, the aperture regulation method of circling water flow rate regulating valve are as follows:
If Z1≤P < Z2, the aperture regulation of circling water flow rate regulating valve to B1；
If Z2≤P < Z3, the aperture regulation of circling water flow rate regulating valve to B2；
If Z3≤P < Z4, the aperture regulation of circling water flow rate regulating valve to B3；
If Z4≤P, the aperture regulation of circling water flow rate regulating valve to B4；
Wherein, Z1 < Z2 < Z3 < Z4,0 B4≤1 < B1 < B2 < B3 <.
Further, after circling water flow rate regulating step, if pressure >=Z1 before the film of current reverse osmosis membrane, by waste water
The aperture of valve increases C1, wherein C1 > 0.
Further, waste water ratio regulating step includes:
Pre-establish the look-up table of raw water temperature T, raw water quality TDS and waste water ratio；
Waste water ratio is found out from the look-up table according to current raw water temperature T, raw water quality TDS, and according to the waste water ratio
Adjust the aperture of wastewater valve.
Further, inlet water solenoid valve is provided between front filter element and booster pump, at the end of water processed, time-delay closing institute
Inlet water solenoid valve and booster pump are stated, the water into reverse osmosis membrane is completely used for rinsing the reverse osmosis membrane.
Based on above-mentioned water purifier control method, the present invention proposes a kind of water purifier simultaneously, including it is sequentially connected before
Filter core, booster pump, reverse osmosis membrane are set, pressure sensor is provided between the booster pump and the reverse osmosis membrane, for detecting
Pressure P before the film of reverse osmosis membrane is provided with temperature sensor and water quality sensor between the front filter element and booster pump, respectively
For detecting raw water temperature T and raw water quality TDS, the water purifier is according to the described in any item control methods of claim 1-9
Execute control.
Compared with prior art, the advantages and positive effects of the present invention are: water purifier control method of the invention, passes through inspection
Raw water temperature T, raw water quality TDS are surveyed, rationally adjusts the waste water ratio to match with the operating condition, while adjusting and increasing according to pressure before film
The revolving speed of press pump selects suitable waste water ratio under the premise of pressure before guaranteeing film is stablized, and improves water yield, reduces water resource
Waste, pressure before film is stabilized, water noise processed accordingly reduces.
After the detailed description of embodiment of the present invention is read in conjunction with the figure, the other features and advantages of the invention will become more
Add clear.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of embodiment flow chart of water purifier control method proposed by the invention；
Fig. 2 is a kind of embodiment systematic schematic diagram of water purifier proposed by the invention；
Fig. 3 is the another embodiment systematic schematic diagram of water purifier proposed by the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Reverse osmosis filter core is the UF membrane filtering technique of power, aperture as low as nanoscale, one using osmotic pressure difference
Under fixed pressure, hydrone can be inorganic salts, heavy metal ion, organic matter, colloid in raw water, thin by reverse osmosis membrane
The impurity such as bacterium, virus can not be by reverse osmosis membrane, so that the condensed water that makes the pure water that can be penetrated and can not penetrate strictly is distinguished
It comes, in order to guarantee the service life of reverse osmosis filter core, in use, it is necessary to ceaselessly reverse osmosis membrane surface be rushed
It washes, reduces the salinity on reverse osmosis membrane surface, slow down blocking caused by film surface fouling, reduce concentrated water drainage.Due to water temperature
And water quality can impact water production, if the waste water ratio being kept fixed, when water temperature is lower or water quality is poor, it will lead
It causes pressure before reverse osmosis membrane excessive, slows down service life, while loud noise will be generated, influence for experiencing, the present invention mentions
A kind of water purifier control method is gone out, when pressure is excessive before the film of reverse osmosis membrane, has then executed decompression processing, pressed before guaranteeing film
Under the premise of power is normal, according to the water flow for adjusting booster pump, higher waste water ratio is kept, improves water yield, reduces water money
Source waste, before the film of reverse osmosis membrane pressure maintain stablize and be located at normal range when, water noise processed also accordingly reduce or
Person disappears.It will be described in detail below with a specific embodiment.
Embodiment one
The present embodiment proposes a kind of water purifier control method, and the water purifier in the present embodiment includes at least sequentially connected preposition
Filter core, booster pump, reverse osmosis membrane, are provided with pressure sensor between booster pump and reverse osmosis membrane, for detecting reverse osmosis membrane
Pressure P before film, is provided with temperature sensor and water quality sensor between booster pump and front filter element, be respectively used to detection raw water temperature
T, raw water quality TDS are spent, which must also include control unit, for controlling to automatically controlled devices such as various valve devices
System, pressure sensor, temperature sensor and water quality sensor connect with control unit respectively, the tap water from running water pipe according to
It is secondary to carry out primary filter through front filter element, it is pressurized by booster pump and water is pumped into reverse osmosis membrane is filtered, as shown in Figure 1,
The water purifier control method of the present embodiment the following steps are included:
Water temperature and quality detecting step: detection raw water temperature T, raw water quality TDS；
Waste water ratio regulating step: the aperture of wastewater valve is adjusted according to raw water temperature T detected and raw water quality TDS；Due to
The producing water ratio of water purifier with reverse osmosis membrane is influenced by water temperature, water quality, and this programme is first according to current water temperature, water quality
Situation adjusts the aperture of wastewater valve, namely the suitable waste water ratio of selection, and the temperature and water quality intake by reverse osmosis membrane be not using
Same waste water ratio, can either meet the rinsing requirement of reverse osmosis membrane, and not will cause water resource waste.
Pressure detecting step before film: pressure P before the film of reverse osmosis membrane is detected；Preceding step is sought by way of adjusting waste water ratio
The balance of water production and pressure before film as far as possible is sought, but cannot be completely by two duty parameters controls in most perfect shape
State, it is possible to which pressure is still larger before there is film, can damage for a long time to reverse osmosis membrane, shortens its service life, this step
Pressure P before film by detecting reverse osmosis membrane, and subsequent step is combined, according to pressure P tune before the film of reverse osmosis membrane detected
Save the revolving speed of booster pump.
Booster pump regulating step: the revolving speed of booster pump is adjusted according to pressure P before the film of reverse osmosis membrane detected.
Wherein, pressure P refers to the hydraulic pressure into before reverse osmosis membrane before the film of reverse osmosis membrane.Pressure and booster pump before film
The relationship that revolving speed is positively correlated can have the function that pressure before the film of adjusting reverse osmosis membrane by the revolving speed of adjusting booster pump.
In booster pump regulating step, by pressure P before the film of reverse osmosis membrane compared with given threshold Z1, if the film of reverse osmosis membrane
Preceding pressure P >=Z1, then reduce the revolving speed of booster pump, wherein Z1 > 0.
The revolving speed of booster pump has multi gear, and pressure value is divided into multiple interval ranges, each interval range is corresponding to be increased
Wherein one grade of revolving speed of press pump judges the interval range that pressure P is fallen into before the film of reverse osmosis membrane, and according to the interval range institute
The rotational speed regulation booster pump of corresponding booster pump.Realize that pressure is stable, booster pump before the film under different quality, water temperature condition
Revolving speed is not mutated, and extends RO film service life.
Due to pressure P moment dynamic change before the film of reverse osmosis membrane, need periodically to execute pressure detecting step before film, if
Pressure P < Z1 before the film of reverse osmosis membrane, then booster pump keeps current rotating speed.
The revolving speed of booster pump and the water flow of booster pump are related, if the water flow of booster pump is very few, it will influence to produce
Water, it is thus impossible to infinitely reduce the revolving speed of booster pump.After the revolving speed for reducing primary or multiple booster pump, if working as
Pressure P >=Z1 before the film of preceding reverse osmosis membrane, then execute circling water flow rate regulating step, and the concentrated water spout of reverse osmosis membrane is wherein all the way and instead
The prime of permeable membrane connects to form return water branch, and circling water flow rate regulating valve is provided in return water branch, and the circling water flow rate is adjusted
Prime one-way conduction when valve is opened by the concentrated water spout of reverse osmosis membrane to the reverse osmosis membrane, the circling water flow rate regulating step packet
It includes:
It opens the circling water flow rate regulating valve or tunes up the aperture of the circling water flow rate regulating valve.
Return water branch be used as a part of concentrated water of reverse osmosis membrane is led back to the prime of reverse osmosis membrane, such as can lead back to
Before the pump of booster pump, since concentrated water belongs to a part of reverse osmosis membrane water outlet, the water outlet of its part is dredged, reduction reverse osmosis has been reached
The purpose of pressure before the film of permeable membrane.This method before part water outlet is back to reverse osmosis membrane, is specifically returned by the way of reflux
Before being back to the pump of booster pump, to reduce pressure before film, the water of reflux can be refiltered by reverse osmosis membrane, be avoided directly
Using reducing water resource waste caused by by the way of waste water ratio.Pressure before the film of reverse osmosis membrane is maintained normal range (NR) by this step
It is interior to guarantee normal water yield.
The aperture regulation method of circling water flow rate regulating valve are as follows:
If Z1≤P < Z2, the aperture regulation of circling water flow rate regulating valve to B1；
If Z2≤P < Z3, the aperture regulation of circling water flow rate regulating valve to B2；
If Z3≤P < Z4, the aperture regulation of circling water flow rate regulating valve to B3；
If Z4≤P, the aperture regulation of circling water flow rate regulating valve to B4；
Wherein, Z1 < Z2 < Z3 < Z4,0 B4≤1 < B1 < B2 < B3 <.
The aperture of circling water flow rate regulating valve is 1 when fully opening, and is 0 when closing, which is solenoid valve, and aperture connects
By the auto-adjustment control of water purifier control module.With the increase of pressure before film, the aperture of circling water flow rate regulating valve accordingly increases
Greatly, have the function that pressure before reliable and effective reduction film.Pressure reduction before film, water noise processed reduces accordingly.
Since pressure change belongs to dynamic changing process before film, various adjustings are also not unalterable, press before film
After power regulating step, pressure before the film of current reverse osmosis membrane is continued to test, if pressure < Z1 before the film of current reverse osmosis membrane, says
Pressure has been adjusted to normal level before the film of bright reverse osmosis membrane, then keeps the aperture of current circling water flow rate regulating valve, and executes
Waste water ratio regulating step.
Due to containing higher dissolved matter in concentrated water, pressure before the simple alleviation film by reflux, water of reflux itself is to reverse osmosis
Permeable membrane exist it is certain influence, therefore, pressure is unable to get before the film when reverse osmosis membrane when being effectively relieved, can be useless by increasing
The mode of water discharge rate further decreases pressure before film.After circling water flow rate regulating step, if before the film of current reverse osmosis membrane
The aperture of wastewater valve is then increased C1, wherein 0 < C1 < 1 by pressure >=Z1.
It is the stepper motor realization that wastewater valve is controlled to adjust by control module, waste water ratio regulating step packet that waste water ratio, which is adjusted,
It includes:
Pre-establish the look-up table of raw water temperature T, raw water quality TDS and waste water ratio；
Waste water ratio is found out from the look-up table according to current raw water temperature T, raw water quality TDS, and according to the waste water ratio
Adjust the aperture of wastewater valve.
As shown in table 1, corresponding with raw water temperature T, raw water quality TDS for the stepper motor revolution of automatically controlled adjustable wastewater valve
Look-up table.
Table 1
Wherein, Y1 < Y2 < Y3 < Y4, X3 < X2 < X1.In view of winter water, Y1 can be the constant less than 0.0≤A7 <
A1≤1 A6 < A5 < A4 < A3 < A2 <, as known from the above, temperature is higher, and TDS value is lower, and stepper motor revolution is smaller, waste water
Ratio valve opening is smaller, and waste water ratio is higher, and vice versa.
If cannot be effectively by pressure reduction to normal range (NR) before film, by reducing waste water ratio by the above method
Mode, increase waste water discharge rate, to reduce pressure before film.
Inlet water solenoid valve is provided between front filter element and booster pump, at the end of water processed, electricity of intaking described in time-delay closing
Magnet valve and booster pump, time-delay closing define different durations according to different TDS water conditions, since clear water faucet is not opened at this time, water
Press larger, the aperture of waste water proportional valve can be increased or opened to maximum, to reduce hydraulic pressure to the pressure of reverse osmosis membrane, institute into
Water is completely used for rinsing reverse osmosis membrane, improves flush efficiency.
Embodiment two
The present embodiment proposes a kind of water purifier, as shown in Fig. 2, including sequentially connected front filter element 11, booster pump 12, reverse osmosis
Permeable membrane 13 and control module are provided with temperature sensor 14 and water quality sensor 15 between front filter element 11 and booster pump 12,
It is respectively used to detection raw water temperature T and raw water quality TDS, is provided with pressure sensor between booster pump 12 and reverse osmosis membrane 13
16, pressure P before the film for detecting reverse osmosis membrane 13, temperature sensor 14, water quality sensor 15 and pressure sensor 16 divide
It is not connect with control module, the concentrated water spout of reverse osmosis membrane 13 connects waste water branch, is provided with wastewater valve 17, waste water in waste water branch
Valve 17 is connect with control module, and the water purifier in the present embodiment in documented control method in embodiment one according to not including back
The control mode of water branch executes control.Its control method can be found in recorded in embodiment one, and this will not be repeated here.
Inlet water solenoid valve 18 is provided between front filter element 11 and booster pump 12, at the end of water processed, time-delay closing water inlet
Solenoid valve 18 and booster pump 12, time-delay closing define different durations, while the pre-washing function of wastewater valve according to different TDS water conditions
It opens, intakes and be completely used for rinsing reverse osmosis membrane 13, improve flush efficiency.
Embodiment three
The present embodiment proposes another water purifier, as shown in figure 3, include sequentially connected front filter element 11, booster pump 12,
Reverse osmosis membrane 13 and control module are provided with temperature sensor 14 and water quality sensor between front filter element 11 and booster pump 12
15, it is respectively used to detection raw water temperature T and raw water quality TDS, is provided with pressure sensing between booster pump 12 and reverse osmosis membrane 13
Device 16, pressure P before the film for detecting reverse osmosis membrane 13, temperature sensor 14, water quality sensor 15 and pressure sensor 16
It is connect respectively with control module, the concentrated water spout of reverse osmosis membrane 13 wherein connects waste water branch all the way, is provided in waste water branch useless
In addition water valve 17 connect to form return water branch, circling water flow rate tune is provided in return water branch with the prime of reverse osmosis membrane 13 all the way
Valve 19 is saved, wastewater valve 17 and circling water flow rate regulating valve 19 are connect with control module respectively, for receiving the control of control module, this
Water purifier in embodiment executes control according to the control mode in documented control method in embodiment one including return water branch
System.Its control method can be found in recorded in embodiment one, and this will not be repeated here.
Waste water branch is connected between the concentrated water spout of reverse osmosis membrane 13 and the water inlet of booster pump 12 namely return water is flow back into
Before booster pump 12, the pressure between booster pump 12 and reverse osmosis membrane 13 can be alleviated.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the those of ordinary skill in domain is made within the essential scope of the present invention, also should belong to this hair
Bright protection scope.
Claims (10)
1. a kind of water purifier control method, which comprises the following steps:
Water temperature and quality detecting step: detection raw water temperature T, raw water quality TDS；
Waste water ratio regulating step: the aperture of wastewater valve is adjusted according to raw water temperature T detected and raw water quality TDS；
Pressure detecting step before film: pressure P before the film of reverse osmosis membrane is detected；
Booster pump regulating step: the revolving speed of booster pump is adjusted according to pressure P before the film of reverse osmosis membrane detected.
2. water purifier control method according to claim 1, which is characterized in that
In booster pump regulating step, by pressure P before the film of reverse osmosis membrane compared with given threshold Z1, if being pressed before the film of reverse osmosis membrane
Power P >=Z1 then reduces the revolving speed of booster pump, wherein Z1 > 0.
3. water purifier control method according to claim 2, which is characterized in that
The revolving speed of booster pump has multi gear, pressure value is divided into multiple interval ranges, each interval range corresponds to booster pump
Wherein one grade of revolving speed, judge the interval range that pressure P is fallen into before the film of reverse osmosis membrane, and according to corresponding to the interval range
Booster pump rotational speed regulation booster pump.
4. water purifier control method according to claim 2 or 3, which is characterized in that
Periodically pressure detecting step before execution film, if pressure P < Z1 before the film of reverse osmosis membrane, forward is worked as in booster pump holding
Speed.
5. water purifier control method according to claim 4, which is characterized in that reducing primary or multiple booster pump
Revolving speed after, if pressure P >=Z1 before the film of current reverse osmosis membrane, execute circling water flow rate regulating step, reverse osmosis membrane it is dense
The mouth of a river wherein connect to form return water branch with the prime of reverse osmosis membrane all the way, and circling water flow rate regulating valve is provided in return water branch,
The circling water flow rate regulating valve open when by reverse osmosis membrane concentrated water spout to the reverse osmosis membrane prime one-way conduction, described time
Water flow regulating step includes:
It opens the circling water flow rate regulating valve or tunes up the aperture of the circling water flow rate regulating valve.
6. water purifier control method according to claim 5, which is characterized in that the aperture regulation side of circling water flow rate regulating valve
Method are as follows:
If Z1≤P < Z2, the aperture regulation of circling water flow rate regulating valve to B1；
If Z2≤P < Z3, the aperture regulation of circling water flow rate regulating valve to B2；
If Z3≤P < Z4, the aperture regulation of circling water flow rate regulating valve to B3；
If Z4≤P, the aperture regulation of circling water flow rate regulating valve to B4；
Wherein, Z1 < Z2 < Z3 < Z4,0 B4≤1 < B1 < B2 < B3 <.
7. water purifier control method according to claim 6, which is characterized in that after circling water flow rate regulating step, if
Pressure >=Z1 before the film of current reverse osmosis membrane, then increase C1 for the aperture of wastewater valve, wherein C1 > 0.
8. water purifier control method according to claim 1-3, which is characterized in that
Waste water ratio regulating step includes:
Pre-establish the look-up table of raw water temperature T, raw water quality TDS and waste water ratio；
Waste water ratio is found out from the look-up table according to current raw water temperature T, raw water quality TDS, and according to the waste water ratio
Adjust the aperture of wastewater valve.
9. water purifier control method according to claim 1-4, which is characterized in that
Inlet water solenoid valve is provided between front filter element and booster pump, at the end of water processed, inlet water solenoid valve described in time-delay closing
And booster pump, the water into reverse osmosis membrane are completely used for rinsing the reverse osmosis membrane.
10. a kind of water purifier, including sequentially connected front filter element, booster pump, reverse osmosis membrane, which is characterized in that the pressurization
It is provided with pressure sensor between pump and the reverse osmosis membrane, pressure P, the front filter element before the film for detecting reverse osmosis membrane
It is provided with temperature sensor and water quality sensor between booster pump, is respectively used to detection raw water temperature T and raw water quality TDS,
The water purifier executes control according to the described in any item control methods of claim 1-9.
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