CN113880286A - Water purification equipment and control method thereof - Google Patents
Water purification equipment and control method thereof Download PDFInfo
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- CN113880286A CN113880286A CN202111385659.XA CN202111385659A CN113880286A CN 113880286 A CN113880286 A CN 113880286A CN 202111385659 A CN202111385659 A CN 202111385659A CN 113880286 A CN113880286 A CN 113880286A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 375
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000000746 purification Methods 0.000 title claims description 41
- 239000012528 membrane Substances 0.000 claims abstract description 108
- 238000005374 membrane filtration Methods 0.000 claims abstract description 61
- 238000011084 recovery Methods 0.000 claims abstract description 44
- 238000001914 filtration Methods 0.000 claims abstract description 20
- 239000012141 concentrate Substances 0.000 claims description 49
- 230000035699 permeability Effects 0.000 claims description 28
- 238000005406 washing Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000003344 environmental pollutant Substances 0.000 claims description 6
- 231100000719 pollutant Toxicity 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 30
- 230000003204 osmotic effect Effects 0.000 description 9
- 239000000523 sample Substances 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000009285 membrane fouling Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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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- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a water purifying device and a control method thereof, and relates to the technical field of water outlet devices, wherein the water purifying device comprises an RO membrane filtering component, a first flow path, a second flow path and a valve body mechanism; the RO membrane filtration assembly comprises a water inlet and a concentrated water outlet; one end of the first flow path is communicated with the concentrated water outlet through a valve body mechanism, and the valve body mechanism can be used for communicating or disconnecting the first flow path with the concentrated water outlet; one end of the second flow path is communicated with the concentrated water outlet through a valve body mechanism, the other end of the second flow path is communicated with the water inlet, and the valve body mechanism can be communicated with or disconnected from the second flow path and the concentrated water outlet. According to the water purifying equipment provided by the invention, the time proportion of the communication between the concentrated water outlet and the first flow path and the time proportion of the communication between the concentrated water outlet and the second flow path are adjusted through the valve body mechanism, the structure is simpler, and the time proportion of the communication between the concentrated water outlet and the first flow path and the time proportion of the communication between the concentrated water outlet and the second flow path can be steplessly adjusted, so that the recovery rate can be steplessly adjusted.
Description
Technical Field
The invention relates to the technical field of water outlet equipment, in particular to water purifying equipment and a control method thereof.
Background
The water purifying equipment is water treating equipment for deep filtering and purifying water. The water quality difference of different areas in China is large, and if the recovery rate of the water purification equipment is kept unchanged when the water purification equipment is used in different water quality areas, the pollution and blockage rate of the water purification equipment in areas with poor water quality is increased, and the service life of the water purification equipment is influenced. Therefore, the recovery rate of the water purification apparatus needs to be adjusted according to local water quality conditions.
Among the prior art, the dense water mouth department of RO membrane filter core sets up the thick water solenoid valve with adjustable, and the thick water solenoid valve with adjustable has a plurality of gears in order to realize the regulation to dense water flow to reach the mesh of adjusting the rate of recovery.
However, the structure of the adjustable concentrated water solenoid valve is complicated and the adjustment gear is limited, which results in the increase of the structural complexity of the water purifying device and the limitation of the adjustment gear of the recovery rate.
Disclosure of Invention
The invention aims to provide a water purifying device, which aims to solve the technical problems that the water purifying device in the prior art is complex in structure and limited in recovery rate adjusting gear.
The invention provides water purification equipment, which comprises an RO membrane filtration assembly, a first flow path, a second flow path and a valve body mechanism, wherein the RO membrane filtration assembly comprises a membrane filtration membrane, a first membrane filtration membrane, a second membrane filtration membrane and a valve body mechanism;
the RO membrane filtering component comprises a water inlet and a concentrated water outlet;
one end of the first flow path is communicated with the concentrated water outlet through the valve body mechanism, and the valve body mechanism can be used for communicating or disconnecting the first flow path with the concentrated water outlet;
one end of the second flow path is communicated with the concentrated water outlet through the valve body mechanism, the other end of the second flow path is communicated with the water inlet, and the valve body mechanism can be communicated with or disconnected from the second flow path and the concentrated water outlet.
Further, the valve body mechanism comprises a first valve body and a second valve body;
one end of the first flow path is communicated with the concentrated water outlet through the first valve body, and one end of the second flow path is communicated with the concentrated water outlet through the second valve body.
Further, the valve body mechanism comprises a reversing valve;
the reversing valve comprises an inlet, a first outlet and a second outlet;
the inlet is communicated with the concentrated water outlet, the first outlet is communicated with one end of the first flow path, and the second outlet is communicated with one end of the second flow path.
Further, the water purification apparatus further comprises a third flow path;
the RO membrane filtration assembly also comprises a pure water outlet;
one end of the third flow path is communicated with the pure water outlet, and the other end of the third flow path is communicated with the water inlet; and a third valve body is arranged on the third flow path.
Further, the water purification unit also comprises a control assembly, wherein the control assembly comprises a controller;
the RO membrane filtering component and the valve body mechanism are respectively connected with the controller;
the controller can acquire pure water permeability coefficient information of the RO membrane filtering assembly, and the controller can control the RO membrane filtering assembly to start and stop and the valve body mechanism to open and close according to the pure water permeability coefficient information.
Further, the RO membrane filtration assembly comprises a booster pump and an RO membrane filter element;
the inlet of the booster pump forms the water inlet of the RO membrane filtering component, and the outlet of the booster pump is communicated with the inlet of the RO membrane filter element; the pure water port of the RO membrane filter element forms a pure water outlet of the RO membrane filter element membrane;
the control assembly further comprises a TDS detector, a temperature detector, a pressure detector and a flow detector; the TDS detector and the temperature detector are both arranged at the water inlet; the pressure detector is arranged at the inlet of the RO membrane filter element; the flow detector is arranged at the pure water outlet;
the TDS detector, the temperature detector, the pressure detector and the flow detector are respectively connected with the controller; the controller can acquire pure water permeability coefficient information of the RO membrane filtration module according to information detected by the TDS detector, the temperature detector, the pressure detector and the flow detector.
Further, the RO membrane filtration module also comprises a concentrate valve;
the concentrate outlet of the RO membrane filter element is communicated with the concentrate inlet of the concentrate valve, and the concentrate outlet of the concentrate valve forms the concentrate outlet of the RO membrane filter assembly;
the concentrated water valve is connected with the controller, and the controller can control the concentrated water valve to be opened and closed.
The invention also aims to provide a control method of the water purifying device, which is used for controlling the water purifying device provided by the invention and comprises the following steps:
a first water making step: controlling the RO membrane filtration assembly to produce water, wherein a concentrated water outlet is communicated with the first flow path, and the concentrated water is discharged through the first flow path;
a second water preparation step: controlling the RO membrane filtration assembly to produce water, wherein a concentrated water outlet is communicated with the second flow path, and the concentrated water flows back to the water inlet of the RO membrane filtration assembly through the second flow path;
adjusting the time proportion: and adjusting the time proportion of the first water production step and the second water production step to ensure that the recovery rate of the water purification equipment reaches a preset value.
Further, the method also comprises the following steps:
concentrated water washing step: starting a booster pump and a concentrated water valve of the RO membrane filtration assembly; controlling a concentrated water outlet to be communicated with the second flow path, and flushing the concentrated water side of the RO membrane filter core by raw water; and the control concentrated water outlet is communicated with the first flow path, and pollutants on the concentrated water side of the RO membrane filter element are discharged through the first flow path.
Further, the method also comprises the following steps:
a pure water washing step: starting a booster pump of the RO membrane filtration assembly, and closing a concentrated water valve of the RO membrane filtration assembly; controlling a pure water outlet to be communicated with the third flow path, and enabling pure water to flow into the concentrated water side of the RO membrane filter element; and the control concentrated water outlet is communicated with the first flow path, and pollutants on the concentrated water side of the RO membrane filter element are discharged through the first flow path.
Further, the step of adjusting the time ratio further comprises the steps of:
obtaining pure water permeability coefficient information of an RO membrane filtration assembly, and fitting an attenuation coefficient of the pure water permeability coefficient according to the pure water permeability coefficient information;
setting a preset range of the attenuation coefficient; when the attenuation coefficient is smaller than a preset range, reducing the time ratio of the first water making step; and when the attenuation coefficient is larger than a preset range, increasing the time ratio of the first water making step.
The invention provides water purification equipment, which comprises an RO membrane filtration assembly, a first flow path, a second flow path and a valve body mechanism, wherein the RO membrane filtration assembly comprises a membrane filtration membrane, a first membrane filtration membrane, a second membrane filtration membrane and a valve body mechanism; the RO membrane filtering component comprises a water inlet and a concentrated water outlet; one end of the first flow path is communicated with the concentrated water outlet through the valve body mechanism, and the valve body mechanism can be used for communicating or disconnecting the first flow path with the concentrated water outlet; one end of the second flow path is communicated with the concentrated water outlet through the valve body mechanism, the other end of the second flow path is communicated with the water inlet, and the valve body mechanism can be communicated with or disconnected from the second flow path and the concentrated water outlet. When the RO membrane filtration assembly produces water, the valve body mechanism controls the concentrated water outlet to be communicated with the first flow path, the concentrated water is discharged through the first flow path, and the recovery rate is relatively low; the valve body mechanism controls the concentrated water outlet to be communicated with the second flow path, the concentrated water flows back to the water inlet of the RO membrane filtering assembly through the second flow path, and the recovery rate is relatively high; the effect of adjusting the recovery rate can be achieved by adjusting the time proportion of the communication between the concentrated water outlet and the first flow path and the time proportion of the communication between the concentrated water outlet and the second flow path. According to the water purifying equipment provided by the invention, the time proportion of the communication between the concentrated water outlet and the first flow path and the time proportion of the communication between the concentrated water outlet and the second flow path are adjusted through the valve body mechanism, the structure is simpler, and the time proportion of the communication between the concentrated water outlet and the first flow path and the time proportion of the communication between the concentrated water outlet and the second flow path can be steplessly adjusted, so that the recovery rate can be steplessly adjusted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a water purifying apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a water purifying apparatus according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a control assembly in a water purifying apparatus according to an embodiment of the present invention;
fig. 4 is a flowchart of a control method of a water purification apparatus according to an embodiment of the present invention.
Icon: 1-pretreating a filter element; 2-water inlet electromagnetic valve; 3, a booster pump; 4-RO membrane cartridge; 5-post-treatment of the filter element; 6-a concentrated water valve; 7-a first valve body; 8-a second valve body; 9-a third valve body; a 10-TDS probe; 11-a pressure detector; 12-one-way high-voltage switch; 13-a flow detector; 14-a water tap; 15-a reversing valve; 16-a controller; 17-a first flow path; 18-a second flow path; 19-third flow path.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present embodiment provides a water purifying apparatus and a control method thereof, and a plurality of embodiments are given below to describe the water purifying apparatus and the control method thereof provided by the present invention in detail.
Example 1
The water purifying apparatus provided by the present embodiment, as shown in fig. 1 to fig. 3, includes an RO membrane filtration module, a first flow path 17, a second flow path 18, and a valve body mechanism; the RO membrane filtration assembly comprises a water inlet and a concentrated water outlet; one end of the first flow path 17 is communicated with the concentrated water outlet through a valve body mechanism, and the valve body mechanism can communicate or disconnect the first flow path 17 and the concentrated water outlet; one end of the second flow path 18 is communicated with the concentrated water outlet through a valve body mechanism, the other end of the second flow path 18 is communicated with the water inlet, and the valve body mechanism can communicate or disconnect the second flow path 18 and the concentrated water outlet.
When the RO membrane filtration assembly produces water, the valve body mechanism controls the concentrated water outlet to be communicated with the first flow path 17, the concentrated water is discharged through the first flow path 17, and the recovery rate is relatively low; the valve body mechanism controls the outlet of the concentrated water to be communicated with the second flow path 18, the concentrated water flows back to the water inlet of the RO membrane filtering component through the second flow path 18, and the recovery rate is relatively high; the recovery rate can be adjusted by adjusting the time ratio of the communication between the concentrated water outlet and the first flow path 17 and the time ratio of the communication between the concentrated water outlet and the second flow path 18. The water purification equipment provided by the embodiment adjusts the time proportion of the communication between the concentrated water outlet and the first flow path 17 and the time proportion of the communication between the concentrated water outlet and the second flow path 18 through the valve body mechanism, the structure is simpler, and the time proportion of the communication between the concentrated water outlet and the first flow path 17 and the time proportion of the communication between the concentrated water outlet and the second flow path 18 can be adjusted in a stepless manner, so that the recovery rate can be adjusted in a stepless manner.
It should be noted that RO is an abbreviation of Reverse Osmosis, and chinese means Reverse Osmosis. Reverse osmosis is a process in which an external pressure higher than the osmotic pressure of a solution is applied to the feed side of a membrane, and only water and certain components in the solution are allowed to selectively permeate through the membrane, while other substances cannot permeate and are trapped on the surface of the membrane. The recovery rate is the ratio of pure water to total water inflow after raw water is purified.
In one embodiment, the valve body mechanism comprises a first valve body 7 and a second valve body 8; one end of the first flow path 17 communicates with the concentrated water outlet through the first valve body 7, and one end of the second flow path 18 communicates with the concentrated water outlet through the second valve body 8.
When the first valve body 7 is opened and the second valve body 8 is closed, the first flow path 17 is communicated with the concentrated water outlet; when the first valve element 7 is closed and the second valve element 8 is opened, the second flow path 18 communicates with the concentrated water outlet.
Wherein, first valve body 7 and second valve body 8 can be manual valve body, also can be the solenoid valve. In this embodiment, the first valve body 7 and the second valve body 8 are electromagnetic valves, and the controller 16 can control the opening and closing of the first valve body 7 and the second valve body 8, so as to improve the convenience of use. The controller 16 controls the first valve body 7 and the second valve body 8 to be opened alternately, so that the switching between the lower recovery rate mode and the higher recovery rate mode can be realized.
In another embodiment, the valve body mechanism includes a diverter valve 15; the diverter valve 15 includes an inlet, a first outlet and a second outlet; the inlet communicates with the concentrate outlet, the first outlet communicates with one end of the first flow path 17, and the second outlet communicates with one end of the second flow path 18.
When the inlet of the reversing valve 15 is communicated with the first outlet, the first flow path 17 is communicated with the concentrated water outlet; when the inlet of the direction valve 15 communicates with the second outlet, the second flow path 18 communicates with the rich water outlet.
The reversing valve 15 can be a manual reversing valve 15 or an electromagnetic reversing valve 15. The switching valve 15 is an electromagnetic switching valve 15, and the switching of the switching valve 15 can be controlled by the controller 16, so that the convenience of operation can be improved.
In this embodiment, the reversing valve 15 is a single-inlet double-outlet solenoid valve, when the single-inlet double-outlet solenoid valve is powered off, the inlet is communicated with the first outlet, the first flow path 17 is communicated with the concentrated water outlet, and the concentrated water is discharged through the first flow path 17; when the single-inlet double-outlet electromagnetic valve is electrified, the inlet is communicated with the second outlet, the second flow path 18 is communicated with the concentrated water outlet, and the concentrated water flows back to the water inlet through the second flow path 18. The controller 16 controls the single-inlet double-outlet electromagnetic valve to be alternately switched on and off, so that the switching between the lower recovery rate mode and the higher recovery rate mode can be realized.
Specifically, the RO membrane filtration assembly comprises a booster pump 3, an RO membrane filter element 4 and a concentrated water valve 6 which are connected in sequence; one end of the first flow path 17 is communicated with the outlet of the concentrated water valve 6 through a valve body mechanism, one end of the second flow path 18 is communicated with the outlet of the concentrated water valve 6 through the valve body mechanism, and the other end of the second flow path 18 is communicated with the inlet of the booster pump 3.
When the booster pump 3 is started and the concentrated water valve 6 is disconnected, the RO membrane filtration assembly produces water, the valve body mechanism controls the concentrated water outlet to be communicated with the first flow path 17, the concentrated water is discharged through the first flow path 17, and the recovery rate is relatively low; the valve body mechanism controls the concentrated water outlet to be communicated with the second flow path 18, the concentrated water flows back to the water inlet of the RO membrane filtering component through the second flow path 18, and the recovery rate is relatively high.
In addition, the water purification apparatus provided in this embodiment can flush the RO membrane filter element 4 with raw water, specifically, the booster pump 3 is controlled to start, the concentrate valve 6 is opened, and the concentrate outlet is communicated with the second flow path 18, at this time, the high-speed raw water circularly flushes the concentrate side of the RO membrane filter element 4, the booster pump 3 is controlled to start after a second of flushing, the concentrate valve 6 is opened, and the concentrate outlet is communicated with the first flow path 17, so as to discharge the flushed contaminants on the concentrate side of the RO membrane filter element 4 through the first flow path 17, after b seconds of discharging the contaminants, the booster pump 3 is controlled to start again, the concentrate valve 6 is opened, and the concentrate outlet is communicated with the second flow path 18, and the high-speed raw water circularly flushes the concentrate side of the RO membrane filter element 4 for a second, so as to stop after a plurality of continuous cycles.
The RO membrane filter element 4 is washed by high-speed raw water circulation, so that dirt on the surface of the RO membrane can be washed more easily, and the service life of the RO membrane filter element 4 is prolonged.
Further, the water purification apparatus further includes a third flow path 19; the RO membrane filtration assembly also comprises a pure water outlet; one end of the third flow path 19 is communicated with the pure water outlet, and the other end of the third flow path 19 is communicated with the water inlet; and a third valve body 9 is provided in the third flow path 19.
By controlling the on/off of the third flow path 19, the RO membrane cartridge 4 can be flushed. Specifically, the booster pump 3 is controlled to be started, the concentrate valve 6 is controlled to be closed, the RO membrane filter assembly produces water, the third valve body 9 is controlled to be opened, the concentrate outlet is communicated with the first flow path 17, at the moment, high-solubility pure water enters the concentrate side of the RO membrane filter element 4, the pure water can dissolve salt scales on the surface of the RO membrane, and the dissolved salt scales are discharged from the first flow path 17 through the concentrate.
Wash RO membrane filter core 4 through the pure water, because the pure water has higher solubility, can dissolve the salt scale deposit on RO membrane surface more easily, reduce the dirty stifled of RO membrane surface to prolong RO membrane filter core 4's life.
Further, the water purification apparatus further comprises a control assembly including a controller 16; the RO membrane filtering component and the valve body mechanism are respectively connected with the controller 16; the controller 16 can acquire pure water permeability coefficient information of the RO membrane filtration module, and the controller 16 can control the start and stop of the RO membrane filtration module and the opening and closing of the valve body mechanism according to the pure water permeability coefficient information.
When the RO membrane filtration assembly needs to produce water, the controller 16 controls the booster pump 3 to be started, the concentrated water valve 6 to be closed, the recovery rate is relatively low when the controller 16 controls the valve body mechanism to be communicated with the first flow path 17 and the concentrated water outlet, the recovery rate is relatively high when the controller 16 controls the valve body mechanism to be communicated with the second flow path 18 and the concentrated water outlet, and the controller 16 realizes the purpose of adjusting the recovery rate by controlling the time ratio of the concentrated water outlet to be communicated with the first flow path 17 and the realization ratio of the concentrated water outlet to the second flow path 18.
When the RO membrane filtration assembly needs raw water washing, the controller 16 controls the RO membrane filtration assembly to start and stop and the valve body mechanism to open and close, and the specific control flow is as described above and is not described herein again.
In addition, the controller 16 can also control the opening and closing of the third valve 9 to achieve the purpose of washing the RO membrane filtration module with pure water, and the specific control flow is as described above and will not be described herein again.
In addition, controller 16 can be according to the decay factor of pure water osmotic coefficient information fitting pure water osmotic coefficient, and controller 16 can predetermine the scope of predetermineeing of decay factor, at the water purification unit during operation, controller 16 constantly monitors the decay factor of pure water osmotic coefficient, and compare pure water osmotic coefficient's decay factor and predetermine the scope, when pure water osmotic coefficient's decay factor is not conform to predetermineeing the scope, the correspondence is adjusted water purification unit, so that pure water osmotic coefficient's decay factor keeps at the numerical value that is fit for, in order to guarantee RO membrane filter core 4's life.
Specifically, when the attenuation coefficient is smaller than the preset range, the RO membrane fouling rate is low, the time ratio of the communication between the first flow path 17 and the concentrated water outlet is reduced, and the recovery rate can be improved; when the attenuation coefficient is larger than the preset range, the RO membrane is higher in dirt blocking and filtering, the time ratio of the communication between the first flow path 17 and the concentrated water outlet is increased, the condition of dirt blocking of the RO membrane can be improved, and the service life of the RO membrane filter element 4 is ensured.
Further, the RO membrane filtration module comprises a booster pump 3 and an RO membrane cartridge 4; an inlet of the booster pump 3 forms a water inlet of the RO membrane filtering component, and an outlet of the booster pump 3 is communicated with an inlet of the RO membrane filter element 4; the pure water port of the RO membrane filter element 4 forms a pure water outlet of the membrane of the RO membrane filter element 4; the control assembly further comprises a TDS detector, a temperature detector, a pressure detector 11 and a flow detector 13; the TDS detector and the temperature detector are both arranged at the water inlet; the pressure detector 11 is arranged at the inlet of the RO membrane filter element 4; the flow detector 13 is arranged at the pure water outlet; the TDS detector, the temperature detector, the pressure detector 11 and the flow detector 13 are respectively connected with a controller 16; the controller 16 can acquire pure water permeability coefficient information of the RO membrane filtration module based on the information detected by the TDS detector, the temperature detector, the pressure detector 11, and the flow detector 13.
It should be noted that the Total Dissolved Solids (TDS), also called Total dissolved solids, is measured in mg/L and represents how many milligrams of dissolved solids are dissolved in 1 liter of water.
The TDS detector may be a TDS probe 10 or any suitable form such as a TDS probe. Temperature detector can be temperature sensor, also can be for arbitrary suitable forms such as thermometer, in this embodiment, TDS detector and temperature detector are integrated as TDS probe 10, and TDS probe 10 can detect the TDS value and the temperature value of the mouth of intaking department raw water.
The pressure detector 11 may be a pressure sensor, or may be in any suitable form such as a pressure probe, and the pressure detector 11 may be capable of detecting the water pressure at the inlet of the RO membrane filter element 4, that is, the pressure value before the RO membrane.
The flow rate detector 13 may be a flow rate sensor or may have any suitable form such as a flow meter, and the flow rate detector 13 can detect the flow rate of pure water at the pure water outlet.
In the case of the RO membrane filtration module, the time for which the first flow path 17 communicates with the concentrate outlet is x seconds, and the recovery rate when the first flow path 17 communicates with the concentrate outlet is k0(ii) a When the second flow path 18 communicates with the concentrate outlet for y seconds, the recovery rate k of the water purification apparatus becomes (x × k)0+ y)/(x + y). Dividing the TDS value of tap water into a plurality of intervals, selecting different recovery rates k according to different intervals, and calculating the interval division of the TDS value to obtain x: y, wherein the interval division is shown in table 1.
TABLE 1
| TDS value (ppm) | [0,a) | [a,b) | [b,c) | [c,d) | [d,+∞) |
| Recovery rate k (%) | k1 | k2 | k3 | k4 | k5 |
| x:y | m1 | m2 | m3 | m4 | m5 |
The pure water permeability coefficient can be calculated by the following formula: a ═ vg/(p-b)0cy)；
Wherein v is the flow rate of pure water, g is the temperature correction coefficient corresponding to the temperature value at the water inlet, p is the pressure value at the inlet of the RO membrane filter element 4, b0Is the osmotic pressure corresponding to a 1ppm solution (b in this example)0And ≈ 0.012), c is a TDS value of raw water, and y is a concentration multiple (y 1/(1-k)).
Attenuation coefficient of pure water permeability coefficient mu ═ a2-a1)/(z2-z1). In order to ensure the service life of the RO membrane filter element 4 and to improve the recovery rate as much as possible, the attenuation coefficient mu of the pure water permeability coefficient is controlled within a set range [ mu ]1,μ2]And (4) the following steps.
Further, the RO membrane filtration module also comprises a concentrate valve 6; a concentrated water port of the RO membrane filter element 4 is communicated with an inlet of a concentrated water valve 6, and an outlet of the concentrated water valve 6 forms a concentrated water outlet of the RO membrane filter assembly; the concentrate valve 6 is connected with the controller 16, and the controller 16 can control the concentrate valve 6 to open and close.
The controller 16 can switch the water production mode and the flushing mode by controlling the opening and closing of the concentrate valve 6. The specific control manner is the same as that described above, and is not described herein again.
The water purification unit that this embodiment provided still includes pretreatment filter core 1 and inlet solenoid valve 2, and pretreatment filter core 1, inlet solenoid valve 2, TDS probe 10 and booster pump 3 connect gradually, and inlet solenoid valve 2 is connected with controller 16, and controller 16 can control the switching of inlet solenoid valve 2, and pretreatment filter core 1 can carry out the preliminary treatment to the raw water and filter.
And, water purification unit still includes one-way high pressure switch 12, aftertreatment filter core 5 and tap 14, and RO membrane filter core 4, one-way high pressure switch 12, flow detector 13, aftertreatment filter core 5 and tap 14 connect gradually, and one-way high pressure switch 12 is connected with controller 16, and controller 16 can control the opening and closing of one-way high pressure switch 12, and aftertreatment filter core 5 can carry out the aftertreatment to pure water and filter.
The water purification equipment provided by the embodiment adjusts the time proportion of the communication between the concentrated water outlet and the first flow path 17 and the time proportion of the communication between the concentrated water outlet and the second flow path 18 through the valve body mechanism, the structure is simpler, and the time proportion of the communication between the concentrated water outlet and the first flow path 17 and the time proportion of the communication between the concentrated water outlet and the second flow path 18 can be adjusted in a stepless manner, so that the recovery rate can be adjusted in a stepless manner.
Example 2
The control method of the water purification apparatus provided in this embodiment is, as shown in fig. 4, for controlling the water purification apparatus provided in embodiment 1, and includes the following steps:
a first water making step: controlling the RO membrane filtration assembly to produce water, wherein a concentrated water outlet is communicated with the first flow path 17, and the concentrated water is discharged through the first flow path 17;
a second water preparation step: controlling the RO membrane filtration assembly to produce water, wherein a concentrated water outlet is communicated with the second flow path 18, and the concentrated water flows back to a water inlet of the RO membrane filtration assembly through the second flow path 18;
adjusting the time proportion: and adjusting the time proportion of the first water production step and the second water production step to ensure that the recovery rate of the water purification equipment reaches a preset value.
When the RO membrane filtration assembly produces water, the valve body mechanism controls the concentrated water outlet to be communicated with the first flow path 17, the concentrated water is discharged through the first flow path 17, and the recovery rate is relatively low; the valve body mechanism controls the outlet of the concentrated water to be communicated with the second flow path 18, the concentrated water flows back to the water inlet of the RO membrane filtering component through the second flow path 18, and the recovery rate is relatively high; the recovery rate can be adjusted by adjusting the time ratio of the communication between the concentrated water outlet and the first flow path 17 and the time ratio of the communication between the concentrated water outlet and the second flow path 18. The valve body mechanism is used for adjusting the time proportion of the communication between the concentrated water outlet and the first flow path 17 and the time proportion of the communication between the concentrated water outlet and the second flow path 18, the structure is simpler, and the time proportion of the communication between the concentrated water outlet and the first flow path 17 and the time proportion of the communication between the concentrated water outlet and the second flow path 18 can be adjusted in a stepless manner, so that the recovery rate can be adjusted in a stepless manner.
Further, the method also comprises the following steps:
concentrated water washing step: starting a booster pump 3 and a concentrated water valve 6 of the RO membrane filtration assembly; a concentrated water outlet is controlled to be communicated with the second flow path 18, and raw water washes the concentrated water side of the RO membrane filter element 4; the concentrated water outlet is communicated with the first flow path 17, and pollutants on the concentrated water side of the RO membrane filter element 4 are discharged through the first flow path 17.
Specifically, the booster pump 3 is controlled to be started, the concentrate valve 6 is controlled to be opened, the concentrate outlet is communicated with the second flow path 18, at the moment, the high-speed raw water circularly washes the concentrate side of the RO membrane filter element 4, the booster pump 3 is controlled to be started after washing for a seconds, the concentrate valve 6 is controlled to be opened, the concentrate outlet is communicated with the first flow path 17, the washed contaminants on the concentrate side of the RO membrane filter element 4 are discharged through the first flow path 17, after the discharged contaminants are discharged for b seconds, the booster pump 3 is controlled to be started again, the concentrate valve 6 is controlled to be opened, the concentrate outlet is communicated with the second flow path 18, and the high-speed raw water circularly washes the concentrate side of the RO membrane filter element 4 for a seconds so as to stop after the continuous circulation is carried out for multiple times.
The RO membrane filter element 4 is washed by high-speed raw water circulation, so that dirt on the surface of the RO membrane can be washed more easily, and the service life of the RO membrane filter element 4 is prolonged.
Further, the method also comprises the following steps:
a pure water washing step: starting a booster pump 3 of the RO membrane filtration assembly, and closing a concentrated water valve 6 of the RO membrane filtration assembly; controlling the pure water outlet to be communicated with the third flow path 19, and enabling the pure water to flow into the concentrated water side of the RO membrane filter element 4; the concentrated water outlet is communicated with the first flow path 17, and pollutants on the concentrated water side of the RO membrane filter element 4 are discharged through the first flow path 17.
Specifically, the booster pump 3 is controlled to be started, the concentrate valve 6 is controlled to be closed, the RO membrane filter assembly produces water, the third valve body 9 is controlled to be opened, the concentrate outlet is communicated with the first flow path 17, at the moment, high-solubility pure water enters the concentrate side of the RO membrane filter element 4, the pure water can dissolve salt scales on the surface of the RO membrane, and the dissolved salt scales are discharged from the first flow path 17 through the concentrate.
Wash RO membrane filter core 4 through the pure water, because the pure water has higher solubility, can dissolve the salt scale deposit on RO membrane surface more easily, reduce the dirty stifled of RO membrane surface to prolong RO membrane filter core 4's life.
Further, the step of adjusting the time ratio further comprises the steps of:
obtaining pure water permeability coefficient information of the RO membrane filtration assembly, and fitting the attenuation coefficient of the pure water permeability coefficient according to the pure water permeability coefficient information;
setting a preset range of attenuation coefficients; when the attenuation coefficient is smaller than the preset range, reducing the time ratio of the first water making step; and when the attenuation coefficient is larger than the preset range, increasing the time ratio of the first water making step.
When the water purification unit is in operation, the controller 16 constantly monitors the attenuation coefficient of the pure water permeability coefficient, compares the attenuation coefficient of the pure water permeability coefficient with the preset range, and correspondingly adjusts the water purification unit when the attenuation coefficient of the pure water permeability coefficient is not in accordance with the preset range, so that the attenuation coefficient of the pure water permeability coefficient is kept at a proper value, and the service life of the RO membrane filter element 4 is ensured.
Specifically, when the attenuation coefficient is smaller than the preset range, the RO membrane fouling rate is low, the time ratio of the communication between the first flow path 17 and the concentrated water outlet is reduced, and the recovery rate can be improved; when the attenuation coefficient is larger than the preset range, the RO membrane is higher in dirt blocking and filtering, the time ratio of the communication between the first flow path 17 and the concentrated water outlet is increased, the condition of dirt blocking of the RO membrane can be improved, and the service life of the RO membrane filter element 4 is ensured.
In the case of the RO membrane filtration module, the time for which the first flow path 17 communicates with the concentrate outlet is x seconds, and the recovery rate when the first flow path 17 communicates with the concentrate outlet is k0(ii) a When the second flow path 18 communicates with the concentrate outlet for y seconds, the recovery rate k of the water purification apparatus becomes (x × k)0+ y)/(x + y). Dividing the TDS value of tap water into a plurality of intervals, selecting different recovery rates k according to different intervals, and calculating the interval division of the TDS value to obtain x: y, wherein the interval division is shown in table 1.
TABLE 1
| TDS value (ppm) | [0,a) | [a,b) | [b,c) | [c,d) | [d,+∞) |
| Recovery rate k (%) | k1 | k2 | k3 | k4 | k5 |
| x:y | m1 | m2 | m3 | m4 | m5 |
The pure water permeability coefficient can be calculated by the following formula: a ═ vg/(p-b)0cy)；
Wherein v is the flow rate of pure water, g is the temperature correction coefficient corresponding to the temperature value at the water inlet, p is the pressure value at the inlet of the RO membrane filter element 4, b0Is the osmotic pressure corresponding to a 1ppm solution (b in this example)0About 0.012), c is originalThe TDS value of water, y is the concentration factor (y 1/(1-k)).
Attenuation coefficient of pure water permeability coefficient mu ═ a2-a1)/(z2-z1). In order to ensure the service life of the RO membrane filter element 4 and to improve the recovery rate as much as possible, the attenuation coefficient mu of the pure water permeability coefficient is controlled within a set range [ mu ]1,μ2]And (4) the following steps.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. A water purification apparatus comprising an RO membrane filtration module, a first flow path (17), a second flow path (18) and a valve body mechanism;
the RO membrane filtering component comprises a water inlet and a concentrated water outlet;
one end of the first flow path (17) is communicated with the concentrated water outlet through the valve body mechanism, and the valve body mechanism can communicate or disconnect the first flow path (17) and the concentrated water outlet;
one end of the second flow path (18) is communicated with the concentrated water outlet through the valve body mechanism, the other end of the second flow path (18) is communicated with the water inlet, and the valve body mechanism can communicate or disconnect the second flow path (18) and the concentrated water outlet.
2. Water purification apparatus according to claim 1, wherein the valve body mechanism comprises a first valve body (7) and a second valve body (8);
one end of the first flow path (17) is communicated with the concentrated water outlet through the first valve body (7), and one end of the second flow path (18) is communicated with the concentrated water outlet through the second valve body (8).
3. Water purification apparatus according to claim 1, wherein the valve body means comprises a diverter valve (15);
the diverter valve (15) comprises an inlet, a first outlet and a second outlet;
the inlet is communicated with the concentrated water outlet, the first outlet is communicated with one end of the first flow path (17), and the second outlet is communicated with one end of the second flow path (18).
4. Water purification apparatus according to claim 1, further comprising a third flow path (19);
the RO membrane filtration assembly also comprises a pure water outlet;
one end of the third flow path (19) is communicated with the pure water outlet, and the other end of the third flow path (19) is communicated with the water inlet; and a third valve body (9) is arranged on the third flow path (19).
5. Water purification apparatus according to any one of claims 1-4, further comprising a control assembly comprising a controller (16);
the RO membrane filtration assembly and the valve body mechanism are respectively connected with the controller (16);
the controller (16) can acquire pure water permeability coefficient information of the RO membrane filtering assembly, and the controller (16) can control the RO membrane filtering assembly to start and stop and the valve body mechanism to open and close according to the pure water permeability coefficient information.
6. The water purification apparatus of claim 5, wherein the RO membrane filtration assembly comprises a booster pump (3) and an RO membrane cartridge (4);
an inlet of the booster pump (3) forms a water inlet of the RO membrane filtering assembly, and an outlet of the booster pump (3) is communicated with an inlet of the RO membrane filter element (4); a pure water port of the RO membrane filter element (4) forms a pure water outlet of the membrane of the RO membrane filter element (4);
the control assembly further comprises a TDS detector, a temperature detector, a pressure detector (11) and a flow detector (13); the TDS detector and the temperature detector are both arranged at the water inlet; the pressure detector (11) is arranged at the inlet of the RO membrane filter cartridge (4); the flow detector (13) is arranged at the pure water outlet;
the TDS detector, the temperature detector, the pressure detector (11) and the flow detector (13) are respectively connected with the controller (16); the controller (16) is capable of acquiring pure water permeability coefficient information of the RO membrane filtration module from information detected by the TDS detector, the temperature detector, the pressure detector (11), and the flow detector (13).
7. The water purification apparatus of claim 6, wherein the RO membrane filtration module further comprises a concentrate valve (6);
a concentrate inlet of the RO membrane filter element (4) is communicated with an inlet of the concentrate valve (6), and an outlet of the concentrate valve (6) forms a concentrate outlet of the RO membrane filter assembly;
the concentrated water valve (6) is connected with the controller (16), and the controller (16) can control the concentrated water valve (6) to be opened and closed.
8. A water purification apparatus control method for controlling the water purification apparatus of any one of claims 1 to 7, characterized by comprising the steps of:
a first water making step: controlling the RO membrane filtration assembly to produce water, wherein a concentrated water outlet is communicated with the first flow path (17), and the concentrated water is discharged through the first flow path (17);
a second water preparation step: controlling the RO membrane filtration assembly to produce water, wherein a concentrated water outlet is communicated with the second flow path (18), and the concentrated water flows back to a water inlet of the RO membrane filtration assembly through the second flow path (18);
adjusting the time proportion: and adjusting the time proportion of the first water production step and the second water production step to ensure that the recovery rate of the water purification equipment reaches a preset value.
9. The water purification apparatus control method according to claim 8, further comprising the steps of:
concentrated water washing step: starting a booster pump (3) and a concentrated water valve (6) of the RO membrane filtration assembly; a concentrated water outlet is controlled to be communicated with the second flow path (18), and raw water washes the concentrated water side of the RO membrane filter element (4); the concentrated water outlet is communicated with the first flow path (17), and pollutants on the concentrated water side of the RO membrane filter element (4) are discharged through the first flow path (17).
10. The water purification apparatus control method according to claim 9, further comprising the steps of:
a pure water washing step: starting a booster pump (3) of the RO membrane filtration assembly, and closing a concentrated water valve (6) of the RO membrane filtration assembly; the pure water outlet is controlled to be communicated with the third flow path (19), and pure water flows into the concentrated water side of the RO membrane filter element (4); the concentrated water outlet is communicated with the first flow path (17), and pollutants on the concentrated water side of the RO membrane filter element (4) are discharged through the first flow path (17).
11. The water purifying apparatus control method of any one of claims 8 to 10, wherein the time ratio adjusting step further comprises the steps of:
obtaining pure water permeability coefficient information of an RO membrane filtration assembly, and fitting an attenuation coefficient of the pure water permeability coefficient according to the pure water permeability coefficient information;
setting a preset range of the attenuation coefficient; when the attenuation coefficient is smaller than a preset range, reducing the time ratio of the first water making step; and when the attenuation coefficient is larger than a preset range, increasing the time ratio of the first water making step.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217821A (en) * | 2015-10-13 | 2016-01-06 | 北京四季沐歌太阳能技术集团有限公司 | A kind of efficient reverse osmosis water manufacturing system of Intelligent adjustment |
| CN207203855U (en) * | 2017-09-01 | 2018-04-10 | 九阳股份有限公司 | A kind of water purifier |
| CN110713276A (en) * | 2019-10-22 | 2020-01-21 | 珠海格力电器股份有限公司 | Water purifier recovery rate control method, device and system and water purifier |
-
2021
- 2021-11-22 CN CN202111385659.XA patent/CN113880286A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217821A (en) * | 2015-10-13 | 2016-01-06 | 北京四季沐歌太阳能技术集团有限公司 | A kind of efficient reverse osmosis water manufacturing system of Intelligent adjustment |
| CN207203855U (en) * | 2017-09-01 | 2018-04-10 | 九阳股份有限公司 | A kind of water purifier |
| CN110713276A (en) * | 2019-10-22 | 2020-01-21 | 珠海格力电器股份有限公司 | Water purifier recovery rate control method, device and system and water purifier |
Non-Patent Citations (1)
| Title |
|---|
| 惠绍棠 等著: "制剂工艺与技术试验册", 中国医药科技出版社, pages: 262 - 88 * |
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