CN115159624A - A kind of reverse osmosis water purification system and control method thereof - Google Patents

Abstract

The invention discloses a reverse osmosis water purification system and a control method thereof, and relates to the technical field of water purification. It includes a filter device, a detection device, a reverse osmosis device and a control panel. A pressure reducing valve is provided, and the pressure reducing valve is arranged at the input end of the raw water and before the filtering device. A concentrated water storage device is provided, the water inlet end of the concentrated water storage device is connected with the concentrated water end of the reverse osmosis device, and the water outlet end is arranged between the pressure reducing valve and the filter device. A pure water circulation pipeline is also provided, two ends of the pure water circulation pipeline are respectively arranged on both sides of the reverse osmosis device, and the pure water circulation pipeline has an automatic circulation valve and a circulating water one-way valve. The beneficial effects of the present invention are: the present invention can store a part of the concentrated water through the concentrated water storage device, which can delay the discharge of the concentrated water and save more water, and the pure water circulation pipeline can solve the problem of the first time the reverse osmosis membrane is out of use for a long time. The problem of high TDS value when taking water.

Description

A kind of reverse osmosis water purification system and control method thereof

technical field

The invention relates to the technical field of water purification, in particular to a reverse osmosis water purification system and a control method thereof.

Background technique

At present, the mainstream product in the household water purification market is a reverse osmosis water purifier with a reverse osmosis membrane as the core. The reverse osmosis membrane has the characteristics of high filtration accuracy and can remove most of the pollutants in the water, but at the same time, the reverse osmosis membrane is working In the process, certain waste water or concentrated water will be produced, which is contrary to the national policy of energy conservation and emission reduction.

The reverse osmosis membrane is an artificial semi-permeable membrane. When the water production is stopped, there is a difference in the concentration of the solution on both sides of the membrane. After a certain period of time, the concentration of the pure water side and the solution measured by the raw water or concentrated water tends to balance, resulting in pure water at this time. The TDS value on the side is too high, which affects the user experience. Some reverse osmosis water purifiers artificially reduce the concentrated water proportional valve to achieve the purpose of saving water. This method will greatly reduce the life of the reverse osmosis membrane, or require frequent flushing, and the overall effect is not satisfactory. .

SUMMARY OF THE INVENTION

Aiming at the problems that the reverse osmosis membrane is disabled for a long time, the TDS value is too high when the water is taken for the first time, the discharge of concentrated water or waste water is large, and the service life of the reverse osmosis membrane is affected. Control Method.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

A reverse osmosis water purification system, comprising a filter device, a detection device, a reverse osmosis device and a control panel, the filter device, the detection device and the reverse osmosis device are connected to each other through pipelines, the detection device and the control panel connected, the reverse osmosis device includes a pure water end and a concentrated water end, and a booster pump is provided before the reverse osmosis device. A pressure reducing valve is provided, and the pressure reducing valve is arranged at the input end of the raw water and before the filtering device. A concentrated water storage device is provided, the concentrated water storage device stores concentrated water from the concentrated water end of the reverse osmosis device, and the water inlet end of the concentrated water storage device is connected with the concentrated water end of the reverse osmosis device, The outlet end of the concentrated water storage device is arranged between the pressure reducing valve and the filter device, and the concentrated water in the concentrated water storage device can be mixed with the raw water to obtain purified water through the filter device, and It flows out through the clean water switch valve. There is also a pure water circulation pipeline, the two ends of the pure water circulation pipeline are respectively arranged on both sides of the reverse osmosis device, and the pure water circulation pipeline has an automatic circulation valve and a circulating water one-way valve, from The pure water at the pure water end of the reverse osmosis device can re-enter the reverse osmosis device through the pure water circulation pipeline.

Further, the filtering device includes a first processing filter element and a second processing filter element, the reverse osmosis device is an RO reverse osmosis membrane, the detection device includes a first TDS probe and a second TDS probe, the decompression The valve, the first treatment filter element, the first TDS probe, the booster pump, the RO reverse osmosis membrane, the second TDS probe and the second treatment filter element are connected in sequence, and pure water flows out through the pure water switch valve. The second TDS probe is connected to the pure water end of the RO reverse osmosis membrane, and a pure water check valve and a pure water pressure are also arranged between the second TDS probe and the second processing filter element in sequence. switch.

Further, the water inlet end of the pure water circulation pipeline is arranged between the second TDS probe and the pure water one-way valve, and the water outlet end is arranged between the first TDS probe and the increaser. Between the pressure pumps, the circulating water one-way valve and the automatic circulating valve are arranged in sequence from the water inlet end to the water outlet end.

Further, the concentrated water end of the RO reverse osmosis membrane is sequentially connected with an automatic concentrated water proportional valve and an automatic discharge valve, and the automatic concentrated water proportional valve and the automatic discharge valve are respectively connected with the control panel, and the automatic The closed state of the concentrated water proportional valve is to allow only a fixed flow of concentrated water to pass through, and its open state is to allow the maximum flow of concentrated water to pass through. The automatic discharge valve is in a normally closed state and can be opened under the control of the control panel.

Further, the water inlet end of the concentrated water storage device is arranged between the automatic concentrated water proportional valve and the automatic discharge valve, and there is a concentrated water pressure switch on the water inlet end, and the concentrated water pressure switch is connected with the control panel. connect.

Further, the control board controls the automatic discharge valve according to the concentrated water pressure value detected by the concentrated water pressure switch.

Further, the outlet end of the concentrated water storage device is arranged between the pressure reducing valve and the first treatment filter element, and the outlet end is provided with a concentrated water one-way valve. The concentrated water from the outlet end of the concentrated water storage device and the concentrated water from the concentrated water end of the RO reverse osmosis membrane are mixed with the raw water and flow through the first treatment filter element, and flow out through the water purification switch valve.

Further, the pressure reducing valve controls the water inlet pressure of the raw water to be between 0.25MPa and 0.3MPa.

A control method for a reverse osmosis water purification system according to any one of the above, wherein the control board detects the TDS value through the first TDS probe and the second TDS probe, and stores the TDS value as The original parameters of reverse osmosis water purification system flushing.

The control board detects the pressure value of pure water flowing through the pipeline according to the pure water pressure switch. When the pure water switch valve is opened, the pure water pressure switch detects that the pressure value of pure water flowing through the pipeline is low. At the preset pure water pressure value, the control board controls the reverse osmosis water purification system to turn on the working state of water production, and the booster pump will be turned on, and the raw water will pass through the pressure reducing valve, the first treatment filter element, the first After the TDS probe and the booster pump, the pure water flows through the RO reverse osmosis membrane and flows out from its pure water end, and the pure water then passes through the second TDS probe, the pure water one-way valve and the pure water pressure switch in sequence, After being filtered again by the second treatment filter element, it flows out from the pure water switch valve.

When the pure water switch valve is closed, and the pure water pressure switch detects that the pressure value in the pipeline is higher than the preset pressure value, the control board will control the reverse osmosis water purification system to stop water production and enter the standby mode state, the control board can compare the ratio value of the second TDS probe and the first TDS probe with a preset ratio value, and when the detected ratio value is greater than the preset ratio value, turn on In the pure water circulation pipeline, the automatic circulation valve and the booster pump are opened, and the pure water is mixed with the raw water and passes through the booster pump and the RO reverse osmosis membrane again. When the ratio is less than a preset value, the pure water circulation pipeline is closed, and the automatic circulation valve and the booster pump are closed.

When the pure water circulation pipeline is opened, if the pure water switch valve is opened at this time, the control panel will close the automatic circulation valve, and the reverse osmosis water purification system will preferentially enter the working state of water production.

When the pure water switch valve is opened, the concentrated water at the concentrated water end of the RO reverse osmosis membrane will enter the concentrated water storage device after passing through the automatic concentrated water proportional valve and the concentrated water pressure switch in sequence. The concentrated water pressure switch can detect the concentrated water pressure flowing through the pipeline. When it is detected that the concentrated water pressure value is greater than the preset concentrated water pressure value, the control panel will open the automatic discharge valve to discharge the concentrated water and release the pressure. , when it is detected that the concentrated water pressure value is less than the preset concentrated water pressure value, the control panel will close the automatic discharge valve.

The beneficial effects of the present invention are: the present invention stores part of the concentrated water at the concentrated water end of the RO reverse osmosis membrane through the concentrated water storage device, which can delay the discharge of the concentrated water and save more water, and the concentrated water The concentrated water pressure value is detected, and the automatic discharge valve can be used to release the pressure in time to ensure safety. The present invention uses the first TDS probe and the second TDS to detect the TDS values of the raw water and the pure water respectively, and uses the pure water circulation pipeline to solve the problem of the first water intake caused by the long-term deactivation of the reverse osmosis membrane When the TDS value is too high, the safety of drinking water is improved.

Description of drawings

FIG. 1 is a schematic structural principle diagram of an embodiment of the present invention.

Description of reference numerals: 1. Raw water pipeline section; 11. Pressure reducing valve; 12. First processing filter element; 13. First TDS probe; 14. Booster pump; 2. Water purification pipeline section; 21. Water purification switch Valve; 3. Concentrated water pipeline section; 31. Automatic discharge valve; 32. Automatic concentrated water proportional valve; 4. Pure water pipeline section; 41. Pure water switch valve; 44. Second TDS probe; 45. Pure water check valve; 51. Automatic circulation valve; 52. Circulating water check valve; 6. RO reverse osmosis membrane; 71. Concentrated water pressure switch; 72. Concentrated water storage device ; 73. Concentrated water one-way valve.

Detailed ways

The present invention discloses a reverse osmosis water purification system and a control method thereof, and an embodiment of the present invention is described in detail below with reference to the accompanying drawings.

A reverse osmosis water purification system, as shown in Figure 1, includes a raw water pipeline section 1, a pure water pipeline section 4, a concentrated water pipeline section 3, a purified water pipeline section 2, a concentrated water storage device 72 and a pure water circulation pipeline.

The raw water casing section is sequentially provided with a pressure reducing valve 11, a first treatment filter element 12, a first TDS probe 13 and a booster pump 14 from the water inlet end to the water outlet end. The outlet end of 1 is connected to the concentrated water end of RO reverse osmosis membrane 6 . The pressure reducing valve 11 can control the inlet pressure of the raw water between 0.25MPa and 0.3MPa. The first treatment filter element 12 can filter the raw water for the first time to ensure that the filtered raw water can meet the water inlet requirements of the RO reverse osmosis membrane 6. The first treatment filter element 12 can be a composite of one or more filter elements. The first TDS probe 13 can be used to detect the TDS value of the raw water, and the first TDS probe 13 is connected to the control board, and the control board can store the detected TDS value and use it as the reverse osmosis water purification system when flushing. The original parameters used to guide the flushing of the reverse osmosis water purification system.

The pure water pipeline section 4 is sequentially provided with a second TDS probe 44, a pure water one-way valve 45, a pure water pressure switch 43 and a second processing filter element 42 from the water inlet end to the water outlet end, and the components are connected to each other through pipelines , the water inlet end of the pure water pipeline section 4 is connected to the pure water end of the RO reverse osmosis membrane 6 , and the water outlet end can flow out pure water through the pure water switch valve 41 . The second TDS probe 44 can be used to detect the TDS value of pure water from the pure water end of the RO reverse osmosis membrane 6. The second TDS probe 44 is connected to the control board, and the control board can store the detected TDS value and use it as The original parameters when the reverse osmosis water purification system is flushed, which is used to guide the flushing of the reverse osmosis water purification system.

The concentrated water pipeline section 3 is sequentially provided with an automatic concentrated water proportional valve 32 and an automatic discharge valve 31 from the water inlet end to the water outlet end, and the components are connected to each other through pipelines. The water inlet end of the concentrated water pipeline section 3 is connected to the RO reverse osmosis membrane 6 The concentrated water is connected to the concentrated water end of the concentrated water pipeline section 3, and the concentrated water can be discharged through the automatic discharge valve 31 at the outlet end of the concentrated water pipeline section 3. The automatic concentrated water proportional valve 32 and the automatic drain valve 31 are respectively connected to the control board. The automatic concentrated water proportional valve 32 can be driven by pneumatic or electric means. The automatic concentrated water proportional valve 32 has two states, namely, a closed state and an open state. The closed state of the automatic concentrated water proportional valve 32 is a concentrated water that only allows a fixed flow. The water passes through, and its open state is to allow the maximum flow of concentrated water to pass through. The automatic discharge valve 31 can be driven pneumatically or electrically. The automatic discharge valve 31 is a closing device in a normal state, which can be controlled by a control panel.

The water inlet end of the concentrated water storage device 72 is arranged between the automatic concentrated water proportional valve 32 and the automatic discharge valve 31, and a concentrated water pressure switch 71 is arranged on the water inlet end, and the concentrated water pressure switch 71 is connected to the control board. A concentrated water one-way valve 73 is provided on the water outlet end of the concentrated water storage device 72 .

The water inlet end of the water purification pipeline section 2 is respectively connected with the concentrated water end of the RO reverse osmosis membrane 6 and the water outlet end of the concentrated water storage device 72, and then purified water is generated through the filtering action of the first treatment filter element 12, and is passed through the water purification switch. Valve 21 flows out clean water.

The pure water circulation pipeline is sequentially provided with a circulating water one-way valve 52 and an automatic circulation valve 51 from the water inlet end to the water outlet end. Between the probe 44 and the pure water one-way valve 45 , the water outlet end is disposed between the first TDS probe 13 and the booster pump 14 .

The control method of the present invention is as follows: when the pure water switch valve 41 is opened, when the pure water pressure switch 43 detects that the pressure value of the pure water flowing through the pure water pipeline section 4 is lower than the preset pure water pressure value, the control board controls When the reverse osmosis water purification system starts the working state of water production, the booster pump 14 will be turned on. After the raw water passes through the pressure reducing valve 11 , the first treatment filter element 12 , the first TDS probe 13 and the booster pump 14 in sequence, it enters the concentrated water end of the RO reverse osmosis membrane 6 . The pure water end of the RO reverse osmosis membrane 6 generates pure water, and the pure water then passes through the second TDS probe 44 , the pure water one-way valve 45 , the pure water pressure switch 43 and the second processing filter element 42 in sequence, and then the pure water opens and closes the valve from the pure water. 41 Pure water flows out. At the same time, the concentrated water at the concentrated water end of the RO reverse osmosis membrane 6 enters the concentrated water storage device 72 through the automatic concentrated water proportional valve 32 and the concentrated water pressure switch 71. The concentrated water pressure switch 71 detects the concentrated water pressure flowing through the pipeline. When the concentrated water pressure value is higher than the preset concentrated water pressure value, the control board will control the automatic discharge valve 31 to open to discharge the concentrated water and release the pressure; when the concentrated water pressure value is lower than the preset concentrated water pressure value, control the The plate will control the automatic drain valve 31 to close.

When the water purification switch valve 21 is opened, the concentrated water from the concentrated water end of the RO reverse osmosis membrane 6 and the concentrated water flowing out from the concentrated water storage device 72 through the concentrated water one-way valve 73 pass through the filtering action of the first treatment filter element 12 together. The clean water switch valve 21 flows out.

When the pure water switch valve 41 is closed, and the pure water pressure switch 43 detects that the pressure value of the pure water flowing through the pure water pipeline section 4 is lower than the preset pure water pressure value, the control board controls the reverse osmosis water purification system to stop the system. water to enter standby mode. The control board can generate a proportional value between the TDS value of pure water detected by the second TDS probe 44 and the TDS value of the raw water detected by the first TDS probe 13, and compare the proportional value with the preset proportional value. comparing. When the proportional value is greater than the preset proportional value, the control panel opens the pure water circulation pipeline. The automatic circulation valve 51 and the booster pump 14 are opened, and the pure water flowing through the second TDS probe 44 passes through the circulating water one-way valve 52 and the automatic circulation valve 51 in sequence, and then enters the raw water pipeline section 1 and flows through the first TDS probe. The raw water of the needle 13 is mixed with each other and then re-enters the RO reverse osmosis membrane 6 through the booster pump 14 . When the proportional value is smaller than the preset proportional value, the control board closes the pure water circulation pipeline, and the automatic circulation valve 51 and the booster pump 14 are closed.

When the pure water circulation pipeline is opened, if the pure water switch valve 41 is opened at this time, and the pure water pressure switch 43 detects that the pressure value of the pure water flowing through the pure water pipeline section 4 is lower than the preset pure water pressure value, The reverse osmosis water purification system will preferentially enter the working state of water production, and the automatic circulation valve 51 will be closed.

Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present invention should also belong to the present invention. the scope of protection of the invention.

Claims (9)

1. A reverse osmosis water purification system which characterized in that: the device comprises a filtering device, a detection device, a reverse osmosis device and a control panel, wherein the filtering device, the detection device and the reverse osmosis device are mutually connected through pipelines, the detection device is connected with the control panel, the reverse osmosis device comprises a pure water end and a concentrated water end, and a booster pump (14) is arranged in front of the reverse osmosis device;

a pressure reducing valve (11) is arranged, and the pressure reducing valve (11) is arranged at the input end of raw water and is positioned in front of the filtering device;

the reverse osmosis water purifier is provided with a concentrated water storage device (72), wherein the concentrated water storage device (72) stores concentrated water from a concentrated water end of the reverse osmosis device, a water inlet end of the concentrated water storage device (72) is connected with a concentrated water end of the reverse osmosis device, a water outlet end of the concentrated water storage device (72) is arranged between the pressure reducing valve (11) and the filtering device, and the concentrated water in the concentrated water storage device (72) can be mixed with raw water and then passes through the filtering device to obtain purified water, and the purified water flows out through a purified water switch valve (21);

the pure water recycling device is characterized by further comprising a pure water recycling pipeline, two ends of the pure water recycling pipeline are arranged on two sides of the reverse osmosis device respectively, the pure water recycling pipeline is provided with an automatic circulating valve (51) and a circulating water one-way valve (52), and pure water from a pure water end of the reverse osmosis device can enter the reverse osmosis device again through the pure water recycling pipeline.

2. A reverse osmosis water purification system according to claim 1, wherein: the filter device comprises a first treatment filter element (12) and a second treatment filter element (42), the reverse osmosis device is an RO reverse osmosis membrane (6), the detection device comprises a first TDS probe (13) and a second TDS probe (44), and the pressure reducing valve (11), the first treatment filter element (12), the first TDS probe (13), the booster pump (14), the RO reverse osmosis membrane (6), the second TDS probe (44) and the second treatment filter element (42) are sequentially connected and flow out pure water through a pure water switch valve (41);

second TDS probe (44) with the pure water end of RO reverse osmosis membrane (6) is connected, second TDS probe (44) with still set gradually pure water check valve (45) and pure water pressure switch (43) between second processing filter core (42).

3. A reverse osmosis water purification system according to claim 2, wherein: the pure water circulating pipeline is characterized in that a water inlet end of the pure water circulating pipeline is arranged between the second TDS probe (44) and the pure water one-way valve (45), a water outlet end of the pure water circulating pipeline is arranged between the first TDS probe (13) and the booster pump (14), and the circulating water one-way valve (52) and the automatic circulating valve (51) are sequentially arranged from the water inlet end to the water outlet end.

4. A reverse osmosis water purification system according to claim 1, wherein: the dense water end of RO reverse osmosis membrane (6) has connected gradually automatic dense water proportional valve (32) and automatic bleeder valve (31), automatic dense water proportional valve (32) and automatic bleeder valve (31) respectively with the control panel is connected, the closed condition of automatic dense water proportional valve (32) is for only allowing the dense water of fixed flow to pass through, and its open mode passes through for the dense water of allowwing maximum flow, automatic bleeder valve (31) are the normally closed state, can receive the control of control panel is opened.

5. A reverse osmosis water purification system according to claim 4, wherein: the water inlet end of the concentrated water storage device (72) is arranged between the automatic concentrated water proportional valve (32) and the automatic discharge valve (31), the water inlet end is provided with a concentrated water pressure switch (71), and the concentrated water pressure switch (71) is connected with the control panel.

6. A reverse osmosis water purification system according to claim 5, wherein: the control board controls the automatic discharge valve (31) according to the concentrated water pressure value detected by the concentrated water pressure switch (71).

7. A reverse osmosis water purification system according to claim 6, wherein: the water outlet end of the concentrated water storage device (72) is arranged between the pressure reducing valve (11) and the first treatment filter element (12), and a concentrated water one-way valve (73) is arranged on the water outlet end;

the concentrated water from the water outlet end of the concentrated water storage device (72) and the concentrated water from the concentrated water end of the RO reverse osmosis membrane (6) are mixed with the raw water, then flow through the first treatment filter element (12) and flow out through the water purification switch valve (21).

8. A reverse osmosis water purification system according to claim 1, wherein: the pressure reducing valve (11) controls the water inlet pressure of raw water to be 0.25MPa to 0.3 MPa.

9. A method of controlling a reverse osmosis water purification system according to any one of claims 1 to 8, wherein:

the control board detects TDS values through the first TDS probe (13) and the second TDS probe (44), and stores the TDS values as original parameters when the reverse osmosis water purification system is washed;

the control panel detects the pressure value of pure water flowing through a pipeline according to the pure water pressure switch (43), when the pure water switch valve (41) is opened, the pure water pressure switch (43) detects that the pressure value of the pure water flowing through the pipeline is lower than a preset pure water pressure value, the control panel controls the reverse osmosis water purification system to start the working state of water production, the booster pump (14) is started, raw water passes through the pressure reducing valve (11), the first treatment filter element (12), the first TDS probe (13) and the booster pump (14) in sequence, passes through the RO (6) and flows out pure water from the pure water end of the RO, then passes through the second TDS probe (44), the pure water one-way valve (45) and the pure water pressure switch (43) in sequence, and flows out from the pure water switch valve (41) after being filtered again by the second treatment filter element (42);

when the pure water switch valve (41) is closed, the pure water pressure switch (43) detects that the pressure value in the pipeline is higher than a preset pressure value, the control board controls the reverse osmosis water purification system to stop water production and enters a standby state, the control board can compare the proportional value of the second TDS probe (44) and the first TDS probe (13) with a preset proportional value, when the detected proportional value is larger than the preset proportional value, the pure water circulation pipeline is opened, the automatic circulating valve (51) and the booster pump (14) are opened, pure water and raw water are mixed and pass through the booster pump (14) and the RO reverse osmosis membrane (6) again, and when the detected proportional value is smaller than the preset proportional value, the pure water circulation pipeline is closed, and the automatic circulating valve (51) and the booster pump (14) are closed;

when the pure water circulating pipeline is opened, if the pure water switch valve (41) is opened at the moment, the automatic circulating valve (51) is closed by the control panel, and the reverse osmosis water purifying system preferentially enters a working state of water preparation;

when pure water switch valve (41) are opened, the dense water of RO reverse osmosis membrane (6) dense water end passes through in proper order automatic dense water proportional valve (32) and will get into behind dense water pressure switch (71) in dense water storage device (72), dense water pressure switch (71) can detect the dense water pressure of flow through the pipeline, and when detecting that dense water pressure value is greater than predetermined dense water pressure value, the control panel will be opened automatic blow-off valve (31) discharge dense water carries out the pressure release, when detecting that dense water pressure value is less than predetermined dense water pressure value, the control panel will be closed automatic blow-off valve (31).

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