CN107511076B - Reverse osmosis membrane flushing system, water purifier and control method of water purifier - Google Patents
Reverse osmosis membrane flushing system, water purifier and control method of water purifier Download PDFInfo
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- CN107511076B CN107511076B CN201710846564.0A CN201710846564A CN107511076B CN 107511076 B CN107511076 B CN 107511076B CN 201710846564 A CN201710846564 A CN 201710846564A CN 107511076 B CN107511076 B CN 107511076B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 321
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 94
- 239000012528 membrane Substances 0.000 title claims abstract description 80
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000012141 concentrate Substances 0.000 claims abstract description 8
- 239000012466 permeate Substances 0.000 claims abstract description 8
- 238000000746 purification Methods 0.000 claims description 55
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 239000008213 purified water Substances 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000008237 rinsing water Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- -1 salt ions Chemical class 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 244000261422 Lysimachia clethroides Species 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
-
- 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
- B01D2321/04—Backflushing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/40—Automatic control of cleaning processes
-
- 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
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
-
- 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
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a reverse osmosis membrane flushing system, a water purifier and a control method thereof. The reverse osmosis membrane flushing system comprises a water inlet connected with a water inlet pipe; a clean water port for flowing out clean water; and a concentrate port for the outflow of concentrate; the flushing device is communicated with the water purifying port and maintains a certain pressure in the water purifying port, so that flushing water in the flushing device can be pressurized and then enters the reverse osmosis membrane filter element through the water purifying port, the flushing water permeates to a concentrated water side, the concentrated water on the concentrated water side is replaced, the replaced concentrated water is discharged from the concentrated water port, the salt ion concentration on the concentrated water side is reduced, and the problem that the TDS value of a water producing side is high easily caused after the reverse osmosis membrane system is shut down for a period of time is solved.
Description
Technical Field
The invention belongs to the technical field of water purification, and particularly relates to a reverse osmosis membrane flushing system, a water purifier and a control method of the reverse osmosis membrane flushing system.
Background
Reverse osmosis is to pressurize the concentrated water side, so that water molecules in the concentrated water side enter the water production side through a reverse osmosis membrane to generate purified water, and simultaneously discharge various impurities and harmful substances which cannot penetrate through the reverse osmosis membrane along with concentrated wastewater.
Reverse osmosis technology is widely used in water purification and other fields, and a typical field is a water purifier. A leading development direction of the current water purifier is to adopt a large-flux barrel-free reverse osmosis membrane system, because the reverse osmosis membrane system has the characteristics of fast water outlet, no water storage barrel and capability of allowing a user to drink pure water which is filtered and drunk instantly.
However, as no water storage barrel is used for storing pure water, the first cup of water directly comes from the water producing side of the reverse osmosis membrane when the faucet is opened to receive water each time, and the TDS value is higher. The reasons for this are: under the condition of stopping water production, part of salt ions on the concentrated water side can permeate to the water production side under osmotic pressure caused by concentration difference, and meanwhile, part of pure water on the water production side can permeate to the concentrated water side due to the concentration difference, so that the salt ion concentration on the water production side is increased. At present, the prior art generally opens a water tap, discharges water for a period of time, and then removes the water. The above-mentioned technical problem, which is a problem and "pain spot" in the industry at present, is not solved by the above-mentioned technology.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the TDS value of the water production side is high easily after the reverse osmosis membrane system in the prior art is stopped for a period of time.
To this end, the present invention provides a reverse osmosis membrane flushing system comprising:
a reverse osmosis membrane filter element, comprising: a water inlet connected with the water inlet pipe; a clean water port for flowing out clean water; and a concentrate port for the outflow of concentrate;
and the flushing device is communicated with the water purifying port, and flushing water in the flushing device can be pressurized and then enters the reverse osmosis membrane filter element through the water purifying port, so that the flushing water permeates to a concentrated water side to replace concentrated water on the concentrated water side and discharge the replaced concentrated water from the concentrated water port.
Further, the water purifying device comprises a water purifying pipe, wherein one end of the water purifying pipe is communicated with the water purifying port, and a water port is formed in the water purifying pipe;
one end of the flushing pipe is communicated with the flushing device, the other end of the flushing pipe is communicated with the water port, and a second electromagnetic valve and a second high-pressure switch are arranged on the flushing pipe;
and one end of the concentrated water pipe is communicated with the concentrated water port, and a third electromagnetic valve is arranged on the concentrated water pipe.
Further, the water inlet pipe comprises a first electromagnetic valve arranged on the water inlet pipe.
The water inlet pipe is arranged between the first electromagnetic valve and the water inlet;
the second water stop valve is arranged on the water purifying pipe and is far away from the water purifying port relative to the water port;
and the supercharging device is arranged on the water inlet pipe between the first electromagnetic valve and the first water stop valve.
In addition, the invention provides a water purifier, which comprises the reverse osmosis membrane flushing system.
The water inlet pipe is provided with a plurality of water inlet pipes, and the water inlet pipes are communicated with the water inlet pipes through water inlet pipes;
and the plurality of rear-stage purification modules are arranged on the water purification pipe to carry out rear-stage purification on the water of the water purification pipe.
The pressure reducing valve is far away from the pre-stage purification module and is arranged on the water inlet end of the water inlet pipe;
and the first high-voltage switch and the flowmeter are far away from the rear-stage purification module and are arranged on the water purification pipe close to the water outlet end of the water purification pipe.
In addition, the invention also provides a control method of the reverse osmosis membrane flushing system, which comprises the following steps:
detecting the outlet water pressure and the outlet water flow of the outlet end of the water purifying pipe;
judging whether the water outlet pressure is lower than a first preset pressure or not, and judging whether the water outlet flow is 0 or not;
and if the water outlet pressure is lower than the first preset pressure and the water outlet flow is 0, opening the second electromagnetic valve and the second high-pressure switch, fully opening the third electromagnetic valve and closing the first electromagnetic valve, and reversely flushing the reverse osmosis membrane filter element by using flushing water in the flushing device.
Further, before the second electromagnetic valve and the second high-pressure switch are opened, the third electromagnetic valve is fully opened, and the first electromagnetic valve is closed, the method further comprises the step of delaying for a first preset time.
Further, the first preset time is greater than or equal to 1000 seconds and less than or equal to 1500 seconds.
Further, the time for the rinsing water in the rinsing device to back rinse the reverse osmosis membrane filter element is more than or equal to 50 seconds and less than or equal to 200 seconds.
Further, if the water outlet pressure is lower than the first preset pressure, when the water outlet flow is not 0, judging whether the water outlet pressure of the flushing device is within a second preset pressure range,
and if the pressure of the water outlet of the flushing device is not within a second preset pressure range, opening the first electromagnetic valve and the second electromagnetic valve, and half-opening the third electromagnetic valve to produce water and store or discharge water into the flushing device.
Further, the method also comprises the steps of judging whether the pressure of the water outlet of the flushing device is in a second preset pressure range or not when the water outlet pressure is higher than the first preset pressure and the water outlet flow is 0,
and when the pressure of the water outlet of the flushing device is within a second preset pressure range, closing the first electromagnetic valve and the second electromagnetic valve to stop water production.
Furthermore, before water preparation, the method also comprises the steps of opening the first electromagnetic valve and fully opening the third electromagnetic valve, closing the second electromagnetic valve and the water outlet end of the purified water pipe, and positively flushing the reverse osmosis membrane filter element.
Further, the second preset pressure is 0.05MPa-0.3 MPa.
Further, the time for forward flushing the reverse osmosis membrane filter element is more than or equal to 15 seconds and less than or equal to 30 seconds.
It should be noted that the first preset pressure is generally set according to actual situations, and for example, the types of equipment of different reverse osmosis membrane flushing systems have corresponding settings, which are well known to those skilled in the art, and are not described again.
The technical scheme of the invention has the following advantages:
1. according to the reverse osmosis membrane flushing system provided by the invention, the reverse osmosis membrane filter element is provided with the water inlet, the water purifying port and the water concentrating port, the flushing device communicated with the water purifying port is arranged, and certain pressure is maintained in the flushing device, so that flushing water in the reverse osmosis membrane filter element can enter the reverse osmosis membrane filter element through the water purifying port after being pressurized, the flushing water is enabled to permeate to the water concentrating side to replace concentrated water at the water concentrating side and discharge the replaced concentrated water from the water concentrating port, the salt ion concentration at the water concentrating side is reduced, and the problem that the TDS value at the water producing side is high easily caused after the reverse osmosis membrane system is stopped for a period of time is solved.
2. The reverse osmosis membrane flushing system provided by the invention can solve the problems, and dirt on the membrane surface is easier to flush by pressurizing the water production side to the concentrated water side and combining forward flushing, so that membrane pollution is delayed, and the service life of the membrane is prolonged; and through setting up a plurality of solenoid valves and stagnant water valve, make reverse osmosis membrane rinse-system have automatic washing function.
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 diagram of a reverse osmosis membrane flushing system according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a water purifier according to an embodiment of the present invention;
FIG. 3 is a flow chart of a control method in an embodiment of the present invention;
description of reference numerals:
1-a reverse osmosis membrane filter element; 2-a washing device; 3-a water inlet; 4-water purification; 5-a dense water gap; 6-a water purifying pipe; 7-a flushing pipe; 8-water gap; 9-a second solenoid valve; 10-a second high voltage switch; 11-a thick water pipe; 12-a third solenoid valve; 13-a first water stop valve; 14-a second water stop valve; 15-a first solenoid valve; 16-a pressure boosting device; 17-a first high voltage switch; 18-a flow meter; 19-a preceding stage purification module; 19-1-first-stage purification module; 19-2-a secondary purification module; 19-3-a third-level purification module; 20-a rear-stage purification module; 21-a pressure reducing valve; 22-a low voltage switch; 23-gooseneck faucet.
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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The present embodiment provides a reverse osmosis membrane flushing system, as shown in fig. 1, including:
a reverse osmosis membrane cartridge 1 comprising: a water inlet 3 connected with the water inlet pipe; a purified water outlet 4 for flowing out purified water; and a concentrate outlet 5 for the outflow of concentrate;
and the flushing device 2 is communicated with the water purifying port 4, flushing water in the flushing device can be pressurized and then enters the reverse osmosis membrane filter element 1 through the water purifying port 4, so that the flushing water permeates to a concentrated water side to replace concentrated water on the concentrated water side and discharge the replaced concentrated water from the concentrated water port 5.
In the present embodiment, the flushing device 2 is a pressure tank.
Among the above-mentioned reverse osmosis membrane rinse-system, set up water inlet 3 on reverse osmosis membrane filter core 1, water purification mouth 4 and dense mouth of a river 5, and set up the washing unit 2 with water purification mouth 4 intercommunication, and maintain certain pressure in it, make in it wash water can be pressurized back and get into reverse osmosis membrane filter core 1 through water purification mouth 4, make the wash water permeate to dense water side, discharge from dense mouth of a river 5 with the dense water of replacement dense water side and with the dense water of replacement, reduce the salt ion concentration of dense water side, reverse osmosis membrane system has been solved after shutting down a period, easily cause the problem that produces the water side TDS value high.
In the present embodiment, the method includes: one end of the water purifying pipe 6 is communicated with the water purifying port 4, and a water port 8 is arranged on the water purifying pipe 6;
and one end of the flushing pipe 7 is communicated with the flushing device 2, the other end of the flushing pipe is communicated with the water port 8, and a second electromagnetic valve 9 and a second high-pressure switch 10 are arranged on the flushing pipe 7.
One end of the concentrated water pipe 11 is communicated with the concentrated water port 5, and a third electromagnetic valve 12 is arranged on the concentrated water pipe 11; specifically, the third electromagnetic valve 12 is a wastewater ratio electromagnetic valve;
in this embodiment, a first solenoid valve 15 is included, which is disposed on the water inlet pipe.
In the present embodiment, the method includes: the first water stop valve 13 is arranged on the water inlet pipe between the first electromagnetic valve 15 and the water inlet 3;
a second water stop valve 14 disposed on the purified water pipe 6 and distant from the purified water port 4 with respect to the water port 8;
and the supercharging device 16 is arranged on the water inlet pipe between the first electromagnetic valve 15 and the first water stop valve 13.
Specifically, the first water stop valve 13 and the second water stop valve 14 are check valves, and the booster device 16 is a booster pump.
The reverse osmosis membrane flushing system can solve the problem that the TDS value of the water production side is high easily after the reverse osmosis membrane system is stopped for a period of time, and dirt on the membrane surface is easy to flush by pressurizing the water production side to the concentrated water side and combining forward flushing, so that membrane pollution is delayed, and the service life of the membrane is prolonged; and through setting up a plurality of solenoid valves and stagnant water valve, make reverse osmosis membrane rinse-system have automatic washing function.
Example 2
The present embodiment provides a water purifier, as shown in fig. 2, including the reverse osmosis membrane flushing system of embodiment 1. Through adopting the reverse osmosis membrane rinse-system in embodiment 1, can solve the water purifier after stopping system water for a period, produce the problem that water side TDS value is on the high side.
In order to improve the water purification effect, the system also comprises a plurality of pre-stage purification modules 19 which are arranged on the water inlet pipe and are used for pre-stage purification of the water in the water inlet pipe; and the plurality of rear-stage purification modules 20 are arranged on the water purification pipe 6 and are used for carrying out rear-stage purification on the water in the water purification pipe 6.
Further, a pressure reducing valve 21 is included, which is far away from the pre-stage purification module 19 and is arranged on the water inlet end of the water inlet pipe;
a first high-pressure switch 17 and a flowmeter 18 which are far away from the rear-stage purification module 20 and are arranged on the water purification pipe 6 near the water outlet end. In this embodiment, the flow meter 18 is a pulse flow meter.
In this embodiment, the front stage purification module 19 comprises a first stage purification module 19-1, a second stage purification module 19-2 and a third stage purification module 19-3, which are sequentially arranged on the purified water pipe along the water flow direction; more specifically, the primary purification module 19-1 is a PP cotton filter element, the secondary purification module 19-2 is an activated carbon filter element, and the tertiary purification module 19-3 is an ultrafiltration membrane filter element. In another embodiment, the primary purification module 19-1 is an ultrafiltration filter element, the secondary purification module 19-2 is an activated carbon filter element, and the tertiary purification module 19-3 is a PP cotton filter element.
As shown in fig. 2, a low-pressure switch 22 and a first electromagnetic valve 15 are arranged on the water inlet pipe between the second-stage purification module 19-2 and the third-stage purification module 19-3;
a supercharging device 16 is arranged on a water inlet pipe between the three-stage purification module 19-3 and the first water stop valve 13;
a back-stage purification module 20 is arranged on a water inlet pipe between the second water stop valve 14 and the first high-voltage switch 17, and specifically, the back-stage purification module 20 is an activated carbon filter element or a composite filter element;
the water outlet end of the water purifying pipe 6 is provided with a gooseneck faucet 23.
The working principle of the water purifier is as follows:
raw water enters the primary purification module 19-1 and the secondary purification module 19-2 through the pressure reducing valve 21 and passes through the low-pressure switch 22, the first electromagnetic valve 15 and the tertiary purification module 19-3. The raw water purified by the preceding stage enters the reverse osmosis membrane filter element 1 through the booster pump and the first water stop valve 13, and the water deeply treated by the reverse osmosis membrane filter element 1 is separated into pure water and concentrated water. The pure water branch is divided into two branches, and one branch is used for a user through the gooseneck faucet 23 after passing through the second water stop valve 14, the rear-stage purification module, the first high-voltage switch 17 and the flowmeter 18; the other pure water branch enters the pressure tank through a second electromagnetic valve 9 and a second high-pressure switch 10. The concentrated water branch is discharged after passing through the waste water ratio electromagnetic valve.
Example 3
This embodiment provides a control method for a reverse osmosis membrane flushing system in embodiment 1, as shown in fig. 3, including the following steps:
detecting the outlet water pressure and the outlet water flow of the outlet end of the water purifying pipe 6;
judging whether the water outlet pressure is lower than a first preset pressure or not, and judging whether the water outlet flow is 0 or not;
if the water outlet pressure is lower than the first preset pressure and the water outlet flow is 0, the second electromagnetic valve 9 and the second high-pressure switch 10 are opened, the third electromagnetic valve 12 is fully opened, the first electromagnetic valve 15 is closed, and the reverse osmosis membrane filter element 1 is backwashed by flushing water in the flushing device 2.
By the control method, the water pressure and the flow are detected in time to reflect the condition of the concentrated water side, the corresponding electromagnetic valve is opened and closed, the concentrated water on the concentrated water side is replaced by purified water, the replaced concentrated water is discharged from the concentrated water port, the concentration of salt ions on the concentrated water side is reduced, and the problem that the TDS value of the water production side is high easily caused after the reverse osmosis membrane system is stopped for a period of time is solved. Meanwhile, the dirt on the membrane surface is easier to wash away, thereby delaying the membrane pollution and prolonging the service life of the membrane.
In this embodiment, a step of delaying a first preset time is further included before opening the second solenoid valve 9 and the second high-pressure switch 10, fully opening the third solenoid valve 12, and closing the first solenoid valve 15. The reverse flushing can be carried out at a proper time by delaying the first preset time, so that the flushing effect is ensured; and secondly, the flushing times are reduced.
In this embodiment, the first predetermined time is greater than or equal to 1000 seconds and less than or equal to 1500 seconds.
Further, the time for the rinsing water in the rinsing device 2 to back rinse the reverse osmosis membrane filter element is greater than or equal to 50 seconds and less than or equal to 200 seconds.
Further, comprising:
if the water outlet pressure is lower than the first preset pressure, judging whether the water outlet pressure of the flushing device 2 is within a second preset pressure range when the water outlet flow is not 0,
if the water outlet pressure of the flushing device 2 is not within the second preset pressure range, the first electromagnetic valve 15 and the second electromagnetic valve 9 are opened, and the third electromagnetic valve 12 is half opened, so that water is produced and stored or discharged into the flushing device 2. By the control method, the water making condition and the water outlet pressure condition in the flushing device 2 are detected in time, water is made in time, the water outlet pressure of the flushing device 2 is maintained within the second preset pressure range, the reverse osmosis membrane filter element is prolonged, and the reverse osmosis membrane cleaning effect is achieved.
Further, comprising: if the water outlet pressure is higher than the first preset pressure, when the water outlet flow is 0, judging whether the water outlet pressure of the flushing device 2 is in a second preset pressure range,
and when the pressure of the water outlet of the flushing device 2 is within a second preset pressure range, closing the first electromagnetic valve 15 and the second electromagnetic valve 9 to stop water production. By the control method, the water making condition and the water outlet pressure condition in the flushing device 2 are detected in time, water is made in time, the water outlet pressure of the flushing device 2 is maintained within the second preset pressure range, the reverse osmosis membrane filter element is prolonged, and the reverse osmosis membrane cleaning effect is achieved.
Furthermore, before water preparation, the method also comprises the steps of opening the first electromagnetic valve 15 and fully opening the third electromagnetic valve 12, closing the second electromagnetic valve 9 and the water outlet end of the purified water pipe 6, and flushing the reverse osmosis membrane filter element 1 in a forward direction. The reverse osmosis filter element is positively washed through the arrangement, and the water purification effect of the reverse osmosis membrane is ensured.
Further, the second preset pressure is 0.05MPa-0.3 MPa.
It should be noted that "the second preset pressure is 0.05MPa-0.3 MPa" is for the RO membrane having a certain back pressure resistance; when the flushing is carried out in the forward direction and the reverse direction, the third electromagnetic valve 12 is fully opened; when the water is to be produced and the water production is stopped, the third electromagnetic valve 12 is half opened.
Further, the time for forward flushing the reverse osmosis membrane filter element 1 is more than or equal to 15 seconds and less than or equal to 30 seconds.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (14)
1. A reverse osmosis membrane flushing system, comprising:
a reverse osmosis membrane cartridge (1) comprising: a water inlet (3) connected with the water inlet pipe; a purified water port (4) for purified water to flow out; and a concentrate port (5) for the outflow of concentrate;
and the flushing device (2) is communicated with the water purifying opening (4), flushing water in the flushing device can be pressurized and then enters the reverse osmosis membrane filter element (1) through the water purifying opening (4), so that the flushing water permeates to a concentrated water side to replace concentrated water on the concentrated water side and discharge the replaced concentrated water from the concentrated water opening (5).
2. The reverse osmosis membrane flushing system of claim 1, comprising:
one end of the water purifying pipe (6) is communicated with the water purifying port (4), and a water port (8) is arranged on the water purifying pipe (6);
one end of the flushing pipe (7) is communicated with the flushing device (2), the other end of the flushing pipe is communicated with the water gap (8), and a second electromagnetic valve (9) and a second high-pressure switch (10) are arranged on the flushing pipe (7);
one end of the concentrated water pipe (11) is communicated with the concentrated water port (5), and a third electromagnetic valve (12) is arranged on the concentrated water pipe (11).
3. The reverse osmosis membrane flushing system of claim 2, comprising:
the first electromagnetic valve (15) is arranged on the water inlet pipe.
4. A water purifier characterized by comprising the reverse osmosis membrane flushing system according to any one of claims 2 to 3.
5. The water purifier according to claim 4, further comprising,
a plurality of pre-stage purification modules (19) arranged on the water inlet pipe to perform pre-stage purification on the water in the water inlet pipe;
and the plurality of rear-stage purification modules (20) are arranged on the water purification pipe (6) and are used for performing rear-stage purification on the water of the water purification pipe (6).
6. A method of controlling a reverse osmosis membrane flushing system according to claim 3 comprising the steps of:
detecting the outlet water pressure and the outlet water flow of the outlet end of the water purifying pipe (6);
judging whether the water outlet pressure is lower than a first preset pressure or not, and judging whether the water outlet flow is 0 or not;
if the water outlet pressure is lower than the first preset pressure and the water outlet flow is 0, the second electromagnetic valve (9) and the second high-pressure switch (10) are opened, the third electromagnetic valve (12) is fully opened, the first electromagnetic valve (15) is closed, and the reverse osmosis membrane filter element (1) is reversely flushed by flushing water in the flushing device (2).
7. Control method according to claim 6, characterized in that it further comprises the step of delaying a first preset time before opening the second solenoid valve (9) and the second high-pressure switch (10), fully opening the third solenoid valve (12) and closing the first solenoid valve (15).
8. The control method according to claim 7, wherein the first preset time is 1000 seconds or more and 1500 seconds or less.
9. The control method according to claim 6, characterized in that the time for which the reverse osmosis membrane cartridge is backwashed by the rinsing water in the rinsing device (2) is 50 seconds or more and 200 seconds or less.
10. The control method according to any one of claims 6 to 9, characterized by comprising:
if the water outlet pressure is lower than the first preset pressure, judging whether the water outlet pressure of the flushing device (2) is within a second preset pressure range when the water outlet flow is not 0,
if the pressure of the water outlet of the flushing device (2) is not within a second preset pressure range, the first electromagnetic valve (15) and the second electromagnetic valve (9) are opened, and the third electromagnetic valve (12) is half opened, so that water is produced and stored or discharged into the flushing device (2).
11. The control method according to any one of claims 6 to 9, characterized by further comprising:
if the water outlet pressure is higher than the first preset pressure, judging whether the water outlet pressure of the flushing device (2) is within a second preset pressure range when the water outlet flow is 0,
and when the pressure of the water outlet of the flushing device (2) is within a second preset pressure range, closing the first electromagnetic valve (15) and the second electromagnetic valve (9) to stop water production.
12. The control method according to any one of claims 6 to 9, characterized by further comprising opening the first solenoid valve (15) and fully opening the third solenoid valve (12), closing the second solenoid valve (9) and the water outlet end of the purified water pipe (6) and flushing the reverse osmosis membrane cartridge (1) in a forward direction before water preparation.
13. The control method according to claim 10, wherein the second preset pressure is 0.05MPa to 0.3 MPa.
14. The control method according to claim 12, characterized in that the time for forward flushing the reverse osmosis membrane cartridge (1) is greater than or equal to 15 seconds and less than or equal to 30 seconds.
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| CN108793457B (en) * | 2018-05-25 | 2021-06-18 | 珠海格力电器股份有限公司 | Water purification system, water purification method and device |
| CN111348762A (en) * | 2018-12-21 | 2020-06-30 | 青岛经济技术开发区海尔热水器有限公司 | Self-cleaning reverse osmosis water purification system |
| CN109399763B (en) * | 2018-12-24 | 2024-04-05 | 宁波普尔净水科技有限公司 | Reverse osmosis water purification equipment and control method |
| CN109569306B (en) * | 2019-01-23 | 2020-01-17 | 珠海格力电器股份有限公司 | Reverse osmosis membrane flushing control method and reverse osmosis membrane flushing system |
| CN109876665A (en) * | 2019-03-13 | 2019-06-14 | 佛山市云米电器科技有限公司 | A kind of water purifier counter-infiltration system backwashed |
| KR20210051018A (en) * | 2019-10-29 | 2021-05-10 | 코웨이 주식회사 | Water purifier |
| CN111348763A (en) * | 2019-12-31 | 2020-06-30 | 海南立昇净水科技实业有限公司 | Whole house water purifier |
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| WO2017039485A1 (en) * | 2015-09-02 | 2017-03-09 | Закрытое Акционерное Общество "Аквафор Продакшн" (Зао "Аквафор Продакшн") | System for purifying a liquid |
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| CN105523655B (en) * | 2016-01-27 | 2018-06-12 | 武汉斯隆电气有限公司 | Flushable water manufacturing system and water purifier in water purifier |
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| CN205598976U (en) * | 2016-03-18 | 2016-09-28 | 北京四季沐歌太阳能技术集团有限公司 | Membrane system is washed to pure water for purifier |
| CN106345306B (en) * | 2016-10-24 | 2020-01-10 | 艾欧史密斯(中国)热水器有限公司 | Control method of water purifier |
| CN206437955U (en) * | 2016-12-28 | 2017-08-25 | 浙江沁园水处理科技有限公司 | With preventing the water purifier of reverse osmosis membrane secondary pollution function |
| CN106823809A (en) * | 2017-04-13 | 2017-06-13 | 莱克电气绿能科技(苏州)有限公司 | A kind of counter-infiltration filter core Self-cleaning system and method and water purifier |
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| WO2017039485A1 (en) * | 2015-09-02 | 2017-03-09 | Закрытое Акционерное Общество "Аквафор Продакшн" (Зао "Аквафор Продакшн") | System for purifying a liquid |
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