CN107915281A - Reverse osmosis water purification system - Google Patents

Abstract

The invention discloses a reverse osmosis water purification system, which comprises a pre-filter, an RO reverse osmosis filter and a post-filter connected in series along the direction of water flow, the water inlet end of the RO reverse osmosis filter and the post-filter A branch is set between the water outlets, a bypass solenoid valve is set on the branch, and the post-filter is connected to the pure water faucet through a pipeline. The invention sets a bypass solenoid valve, which solves the problem that the TDS probe of the first water outlet of the large-flow RO reverse osmosis system exceeds the standard; the TDS of the water passing through the OR reverse osmosis filter is detected by the water outlet TDS probe, so that the entire reverse osmosis system Filtration achieves the function of automatic adjustment.

Description

A reverse osmosis water purification system

technical field

The invention belongs to the technical field of household appliances, and in particular relates to a reverse osmosis water purification system.

Background technique

At present, with the development of industrialization and the improvement of people's living standards, the pollution of water resources is becoming more and more serious, and people are paying more and more attention to the quality of water resources. For this reason, more and more water purification technologies are popularized. In the general civilian field, corresponding water purification products have also been promoted. When the reverse osmosis water purifiers on the market produce water, a large amount of concentrated water will be produced, and the concentrated water will be directly discharged into the sewer. caused serious waste.

The reverse osmosis water purifier with the best filtering effect has been favored unprecedentedly, especially at present, a large number of reverse osmosis water purifiers are popular in the market, and a large number of reverse osmosis water purifiers have canceled the pressure tank that may breed bacteria and produce odors , but when the water purifier is not used for a long time, when the water is drawn for the first time, there is an infiltration process when the reverse osmosis membrane is passed through the water for the first time. During this period, a small amount of residual substances in the production of membrane materials will dissolve in the water and be washed out. At the beginning, the TDS of pure water exceeds the standard, but for users, the first time to use water is the most, which results in the pure water used most of the time is water with TDS exceeding the standard.

At present, this problem has not been effectively solved. Some manufacturers have set up light reminders. When the TDS exceeds the standard, it will display a yellow light, and when the TDS is normal, it will display a green light, warning users to wait until the green light is on before starting to take water. This has brought troubles to users. Because the water It keeps flowing, and there is a lot of pressure in my heart. I have to keep an eye on the water flow and the indicator light. The user experience is poor.

The patent application number 201410824527.6 discloses a water-saving reverse osmosis membrane water purifier, which includes a pre-filter device, a booster pump, a TDS detector, a reverse osmosis membrane filter assembly, double faucets, and pressure water storage. Tank, bypass solenoid valve, return water throttle valve, the water outlet of the pre-filter device is connected to the water inlet of the reverse osmosis membrane filter module through the booster pump and TDS, and the detection signal of the TDS detector is sent to the bypass electromagnetic The electrical control end of the valve, the first water inlet of the double faucet is connected with a pressure switch, and the clean water outlet of the reverse osmosis membrane filter module is connected to the pressure water storage tank and the first water inlet of the double faucet through a water outlet check valve , the concentrated water outlet of the reverse osmosis membrane filter assembly is connected to the second water inlet of the double faucet, and is connected to the water inlet of the bypass solenoid valve and the water inlet of the pre-filter device through the return water throttle valve. In the present invention, when the detected TDS value exceeds the standard, the concentrated water is discharged, which results in waste of water.

In view of the above reasons, the present invention is proposed.

Contents of the invention

The invention provides a reverse osmosis water purification system. A bypass solenoid valve is connected in parallel between the water inlet TDS probe and the post filter. When it is detected that the water outlet TDS probe is higher than the measured value, the bypass solenoid valve is opened. , the water circulates to ensure that the TDS received when the user first turns on the pure water end of the pure water faucet will not exceed the standard.

The invention discloses a reverse osmosis water purification system, which comprises a pre-filter, an RO reverse osmosis filter and a post-filter connected in series along the direction of water flow, the water inlet end of the RO reverse osmosis filter and the post-filter A branch is set between the water outlets, a bypass solenoid valve is set on the branch, and the post-filter is connected to the pure water faucet through a pipeline.

When the user turns on the pure water end of the pure water faucet for the first time, the TDS of the water coming out of the faucet often exceeds the standard. When the system detects that the TDS is higher than the set value, the bypass solenoid valve will open, and the The water returns to the circulating water circuit through the bypass solenoid valve, and then enters the RO reverse osmosis filter through the booster pump. When the detected TDS is lower than the set value, the bypass solenoid valve is closed and passes through the post filter. The pure water produced enters the pure water faucet and enters the user's water receiving container.

Further, along the water flow direction, the pre-filter includes a first pre-filter, a second pre-filter and a third pre-filter connected in series in sequence, and the filter element of the first pre-filter It is a 5-micron melt-blown polypropylene filter element, the filter element of the second pre-filter is a granular activated carbon filter element, and the filter element of the third pre-filter is a 1-micron melt-blown polypropylene filter element.

Further, the post-filter is an activated carbon filter, and the activated carbon filter is connected to a pure water faucet through a pipeline.

Further, a low pressure switch and a water inlet solenoid valve are sequentially arranged between the pre-filter and the water inlet TDS probe along the direction of water flow.

Among them, the low-pressure switch plays a protective role for the booster pump. When the water pressure is too low, the lower than the switch is in a disconnected state, so that no water will enter, which has a certain protective effect on the booster pump and prevents the pump from idling. .

Further, a booster pump is arranged between the influent TDS probe and the RO reverse osmosis filter.

Further, the RO reverse osmosis filter is provided with a concentrated water outlet and a pure water outlet.

Further, the water inlet of the post-filter is connected with the pure water outlet.

Further, the concentrated water outlet is connected with a flushing solenoid valve.

The RO reverse osmosis filter will produce a large amount of concentrated water in the process of preparing pure water. The concentrated water will flow out through the concentrated water outlet, enter the flushing solenoid valve, and then be discharged from the reverse osmosis system.

Further, a one-way valve at the pure water end, a high pressure switch at the pure water end, and an outlet TDS probe are sequentially arranged between the pure water outlet of the RO reverse osmosis filter and the post-filter along the water flow direction.

Further, the water passing through the pre-filter is communicated with the pure water faucet through the pipeline.

Another object of the present invention is that the reverse osmosis system of the present invention is connected with a heating unit, the concentrated water produced by the RO reverse osmosis filter enters the heating unit through the waste water ratio, the water outlet of the heating unit is connected with the tap water source, and the tap water source and the purified water Unit's water inlet connection.

Further, the RO reverse osmosis filter is provided with a concentrated water outlet and a pure water outlet.

Among them, the water filtered by the RO reverse osmosis filter is discharged through the pure water outlet, and enters the pure water faucet through the pipeline. When the user opens the pure water faucet, the pure water flows out and enters the water-saving container.

Further, the wastewater ratio is connected in parallel with a flushing solenoid valve, and the water from the concentrated water outlet can pass through the wastewater ratio and the flushing solenoid valve respectively, and the wastewater ratio and the flushing solenoid valve do not work at the same time.

Among them, when the user opens the pure water faucet, when preparing pure water, the RO reverse osmosis filter produces a large amount of concentrated water, which is discharged through the concentrated water outlet. At this time, the waste water ratio is opened, the flushing solenoid valve is closed, and the concentrated water passes through the waste water The ratio enters the heating unit, after being diluted in the heating unit, it passes through the high-pressure sensor at the hot water end and the one-way valve at the hot water end, and joins with the tap water source to participate in the water production cycle.

When the user turns on the hot water handle of the domestic faucet, the flushing solenoid valve opens, and the filtered water flows out through the concentrated water outlet, enters the heating unit, and enters the domestic faucet from the outlet of the heating unit to realize hot water in winter.

Further, the water purification unit further includes a pre-filter and a post-filter, and the RO reverse osmosis filter is arranged between the pre-filter and the post-filter.

Further, along the direction of water flow, the pre-filter includes a first pre-filter, a second pre-filter and a third pre-filter connected in series in sequence, and the first pre-filter element is a 5 micron melt-blown poly Propylene filter element, the second pre-filter element is a granular activated carbon filter element, the third pre-filter element is a 1 micron melt-blown polypropylene filter element, the post-filter is an activated carbon filter, and the activated carbon filter passes through The pipeline is connected with a pure water faucet.

Further, a pure water check valve, a high pressure switch at the pure water end, and an outlet TDS probe are sequentially arranged between the RO reverse osmosis filter and the post filter along the flow direction of the pure water.

Further, a low pressure switch, a water inlet solenoid valve, a water inlet TDS probe and a booster pump are sequentially arranged between the pre-filter and the RO reverse osmosis filter along the direction of water flow.

Further, a temperature sensor is installed between the tap water source and the pre-filter, and a hot water end high pressure sensor and a hot water end check valve are arranged sequentially along the water flow direction between the water outlet of the heating unit and the tap water source.

Among them, when the system detects that the temperature sensor is higher than the system setting value, the unit chipset sends an instruction to open the overflow solenoid valve and exit the zero-emission mode, until the temperature sensor is lower than the system setting value, close the overflow solenoid valve, and again Enter zero emission mode.

Further, a one-way valve at the concentrated water end is set between the waste water ratio and the water inlet of the heating unit;

Preferably, a softening filter is further arranged between the one-way valve at the concentrated water end and the water inlet of the heating unit.

Further, an overflow solenoid valve is provided between the wastewater ratio and the one-way valve at the concentrated water end, and the overflow solenoid valve communicates with the sewer through a pipeline.

Among them, when the TDS detected by the system inlet TDS probe is higher than the system set value, the unit chipset sends an instruction to open the overflow solenoid valve, exit the zero discharge mode, and flow the concentrated water into the sewer through the overflow solenoid valve. The TDS detected by the water TDS probe is lower than the system setting value, the overflow solenoid valve is closed, and the zero discharge mode is entered again.

Adopt above-mentioned technical scheme, the beneficial effect of the present invention is as follows:

(1) The present invention is provided with a bypass solenoid valve, which solves the problem that the TDS probe of the large-flow RO reverse osmosis system exceeds the standard for the first time;

(2) Detect the TDS of the water passing through the OR reverse osmosis filter through the effluent TDS probe, so that the filtration of the entire reverse osmosis system can be automatically adjusted;

(3) Utilize the combination of heating unit and water purification unit to recycle concentrated water produced in the process of preparing pure water to achieve zero discharge;

(4) The clean water supply of the heating unit has been realized;

(5) The heating unit can preheat the RO membrane inlet water at low temperature to improve the efficiency of the membrane;

(6) When domestic water is selected, the RO membrane can be flushed to prolong the life of the RO membrane.

Description of drawings

The accompanying drawings, as a part of the present invention, are used to provide a further understanding of the present invention, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute improper limitations to the present invention. Apparently, the drawings in the following description are only some embodiments, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts. In the attached picture:

Fig. 1: reverse osmosis system of the present invention;

Figure 2: A water bar system with zero discharge of waste water according to Embodiment 4 of the present invention.

Among them, 1-life faucet, 2-tap water source, 3-high pressure sensor at hot water end, 4-kitchen heater, 5-one-way valve at hot water end, 6-one-way valve at concentrated water end, 7-overflow solenoid Valve, 8-flushing solenoid valve, 9-temperature sensor, 10-first pre-filter, 11-second pre-filter, 12-third pre-filter, 13-low pressure switch, 14-water inlet solenoid Valve, 15-inlet TDS probe, 16-booster pump, 17-RO reverse osmosis filter, 18-pure water end check valve, 19-pure water end high pressure switch, 20-outlet TDS probe, 21- Post filter, 22- pure water faucet, 23- waste water ratio, 30- bypass solenoid valve.

It should be noted that these drawings and text descriptions are not intended to limit the concept scope of the present invention in any way, but illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a reverse osmosis water purification system according to the present invention includes a pre-filter, an RO reverse osmosis filter 17, a post-filter 21, a pre-filter 21 and a RO reverse osmosis filter 17 A water inlet TDS probe 15 is arranged therebetween, and a bypass solenoid valve 30 is connected in parallel between the water inlet TDS probe 15 and the post filter 21 .

When the user opens the pure water end of the pure water faucet 22 for the first time, the water coming out of the faucet often exceeds the standard. Open, at this time, the water coming out of the post filter 21 passes through the bypass solenoid valve 30 and returns to the circulating waterway, passes through the booster pump 16 and then enters the RO reverse osmosis filter 17, when the water outlet TDS probe 20 detects When the TDS is lower than the set value, the bypass solenoid valve 30 is closed, and the pure water produced by the post-filter 21 enters the pure water faucet and enters the user's water receiving container.

The pure water faucet 22 in the present invention has two switches, one is a water purification switch and the other is a pure water switch.

The pre-filter described in the present embodiment comprises a first pre-filter 10, a second pre-filter 11 and a third pre-filter 12, and the filter element of the first pre-filter 10 is 5 The micron melt-blown polypropylene filter element, the filter element of the second pre-filter 11 are granular activated carbon filter elements, and the filter element of the third pre-filter 12 is a 1-micron melt-blown polypropylene filter element.

Further, the post-filter 21 is an activated carbon filter, and the activated carbon filter is connected to the pure water faucet 22 through a pipeline.

Example 1

In this embodiment, when the user turns on the water purification switch of the pure water faucet 22, the tap water enters the pipeline from the tap water source, and passes through the first pre-filter 10, the second pre-filter 11, and the third pre-filter successively. 12. The pure water flows out from the faucet 22 and reaches the user's water receiving container.

Example 2

When the user turns on the pure water switch of the pure water faucet 22, the tap water enters the pipeline from the tap water source, passes through the first pre-filter 10, the second pre-filter 11, the third pre-filter 12, and then passes through the low pressure switch. 13. The water inlet solenoid valve 14, the water inlet TDS probe 15, and the booster pump 16 enter the RO reverse osmosis filter 17. The OR reverse osmosis filter 17 has two water outlets, one for pure water and the other for pure water. It is the concentrated water outlet, and the pure water passes through the pure water outlet through the pure water end check valve 18, the pure water end high pressure switch 19 and the outlet TDS probe 20, and then enters the post-filter 21, passes through the post-filter After filtering by 21, the pure water enters into the user's water receiving container through the pure water faucet 22.

A large amount of concentrated water is produced during the process of preparing pure water, and the concentrated water at this time flows out through the concentrated water outlet, and is discharged into the sewer through the flushing solenoid valve 8 .

Example 3

In this embodiment, a TDS detection device is provided before and after the RO reverse osmosis filter 17, which can monitor the TDS status in the system in real time, and a bypass solenoid valve 30 is set before the booster pump 16 and after the RO reverse osmosis filter 17 , when the water TDS probe detects that the TDS of the water flowing out of the RO reverse osmosis filter 17 exceeds the set value, regardless of whether the user is in the state of re-taking water, the chipset automatically activates the bypass solenoid valve 30 to open the water inlet Solenoid valve 14, the pure water produced by RO reverse osmosis filter 17 returns to the main waterway through bypass solenoid valve 30 to participate in the purification process, passes through booster pump 16 in turn, enters RO reverse osmosis filter 17, and OR reverse osmosis The filter 17 has two water outlets, one for pure water and the other for concentrated water. The pure water passes through the pure water outlet in turn through the pure water end check valve 18, the pure water end high pressure switch 19 and the water outlet TDS. The probe 20 then enters the post-filter 21. After being filtered by the post-filter 21, the pure water enters the user's water receiving container through the pure water faucet 22. In addition, a large amount of concentrated water, then the concentrated water at this time flows out through the concentrated water outlet, and is discharged in the sewer through the flushing solenoid valve 8.

Until the TDS value detected by the water outlet TDS probe is lower than the set value, the bypass solenoid valve 30 is closed. Now when the user opens the pure water switch of the pure water faucet 22, tap water enters the pipeline from the tap water source, passes through the first pre-filter 10, the second pre-filter 11, the third pre-filter 12 successively, and then passes through Low pressure switch 13, water inlet solenoid valve 14, water inlet TDS probe 15, booster pump 16 enter into RO reverse osmosis filter 17, OR reverse osmosis filter 17 has two water outlets, one is pure water outlet, The other is the concentrated water outlet. The pure water passes through the pure water outlet through the pure water end check valve 18, the pure water end high pressure switch 19 and the water outlet TDS probe 20, and then enters the post-filter 21. After the filter 21 is filtered, the pure water enters the user's water receiving container through the pure water faucet 22 .

Wherein, a large amount of concentrated water is produced in the process of preparing pure water, and the concentrated water at this time flows out through the concentrated water outlet, and is discharged into the sewer through the flushing solenoid valve 8 .

Example 4

As shown in Figure 2, the present invention is a water bar system with zero discharge of waste water, including a heating unit and a water purification unit. The heating unit is connected to the water purification unit through a pipeline, and the water purification unit includes an RO reverse osmosis filter 17, and the concentrated water produced by the RO reverse osmosis filter 17 enters the heating unit for dilution through a waste water ratio of 23, The diluted water enters the high pressure sensor 3 at the hot water end, the one-way valve 5 at the hot water end and mixes with the tap water source 2 through the water outlet of the heating unit, and the mixed water enters the water inlet of the water purification unit.

Among them, the heating temperature of the water in the kitchen treasure water heater 4 should not be set too high, and it is best to set it between 35-50°C in the present invention. Exceeds the operating temperature of the RO membrane.

The RO reverse osmosis filter 17 described in this embodiment is provided with a concentrated water outlet and a pure water outlet. The water filtered by the RO reverse osmosis filter 17 is discharged through the pure water outlet, and enters the pure water faucet 22 through the pipeline. When the user opens the pure water faucet 22, the pure water flows out and enters the water-saving container. The concentrated water filtered by the RO reverse osmosis filter 17 flows out through the concentrated water outlet. When the user opens the domestic faucet 1, the purified water filtered by the pre-filter and the RO reverse osmosis filter 17 flows out through the concentrated water outlet.

The waste water ratio 23 described in this embodiment is connected in parallel with a flushing solenoid valve 8, and the water from the concentrated water outlet can pass through the waste water ratio 23 and the flushing solenoid valve 8 respectively, and the waste water ratio 23 and the flushing solenoid valve 8 does not work at the same time.

Among them, the wastewater ratio 23 and the flushing solenoid valve 8 are not opened at the same time. When the wastewater ratio 23 is opened, the flushing solenoid valve 8 is closed. At this time, the concentrated water enters the heating unit through the wastewater ratio 23. After being diluted in the heating unit, it is heated The high pressure sensor 3 at the water end and the one-way valve 5 at the hot water end merge with the tap water source 2 to participate in the water production cycle. When the flushing electromagnetic valve 8 is opened, the waste water ratio 23 is closed. At this time, the user opens the faucet of domestic water for work. The filtered water flows out through the concentrated water outlet, enters the heating unit through the electromagnetic valve 6 at the concentrated water end, and is discharged from the heating unit. The water outlet of the unit enters the domestic faucet 1 to realize the function of hot water in winter.

In this embodiment, when the user opens the pure water end of the pure water faucet 22 for the first time, the TDS of the water from the faucet often exceeds the standard. The bypass solenoid valve 30 is opened, and the water coming out of the post-filter 21 passes through the circulating water path returned by the bypass solenoid valve 30, and enters the RO reverse osmosis filter 17 through the booster pump 16. When the TDS detected by the TDS probe 20 is lower than the set value, the bypass solenoid valve 30 is closed, and the pure water generated by the post filter 21 enters the pure water faucet and enters the user's water receiving container.

When the user opens the pure water faucet 22, the system detects that the high pressure sensor 19 is in the connected state, the unit chipset sends an instruction to start the water inlet solenoid valve 14 and the booster pump 16, and the tap water comes in from the tap water source 2, passes through the tap water pipeline, and the temperature sensor 9. The first pre-filter 10, the second pre-filter 11, the third pre-filter 12, the water inlet check valve 14, the booster pump 16, wherein the third pre-filter 12 and the water inlet A low-pressure switch 13 is arranged between the one-way valves 14. The function of the low-pressure switch 13 is mainly to protect the booster pump 16 by preventing the booster pump 16 from running dry when the tap water pressure is insufficient. , then the tap water enters the RO reverse osmosis filter 17, and is filtered through the RO membrane filter element. The pure water produced passes through the pure water check valve 18, the high pressure switch 19 at the pure water end, and the post filter 21, and flows out from the pure water faucet 22. Reaching the user's water receiving container, the reverse osmosis water purifier system will produce a large amount of concentrated water while producing pure water. The concentrated water flows out from the concentrated water outlet of the RO reverse osmosis filter. The one-way valve 6 at the end enters the kitchen treasure heater 4, and after being diluted in the kitchen treasure heater, it passes through the high-pressure sensor 3 at the hot water end, the one-way valve 5 at the hot water end, and merges with the tap water source 2 to participate in the water production cycle.

The implementations in the above examples can be further combined or replaced, and the examples are only descriptions of preferred embodiments of the present invention, and are not intended to limit the concept and scope of the present invention. Various changes and improvements to the technical solutions of the present invention made by those skilled in the art belong to the protection scope of the present invention.

Claims (10)

1. A reverse osmosis water purification system is characterized in that, along the water flow direction, it comprises a pre-filter, an RO reverse osmosis filter and a post-filter connected in series successively, and the water inlet and the post-filter of the RO reverse osmosis filter A branch is arranged between the water outlets of the filters, a bypass electromagnetic valve is arranged on the branch, and the post-filter is connected with a pure water faucet through a pipeline. 2. A kind of reverse osmosis water purification system according to claim 1, characterized in that, along the water flow direction, said pre-filter comprises a first pre-filter, a second pre-filter and The third pre-filter, the filter core of the first pre-filter is a 5 micron melt-blown polypropylene filter core, the filter core of the second pre-filter is a granular activated carbon filter core, and the filter core of the third pre-filter is 1 Micron meltblown polypropylene filter element. 3. A reverse osmosis water purification system according to claim 1 or 2, characterized in that, the post-filter is an activated carbon filter, and the activated carbon filter is connected to a pure water faucet through a pipeline. 4. A reverse osmosis water purification system according to claim 1, characterized in that a low pressure switch and a water inlet solenoid valve are sequentially arranged between the pre-filter and the water inlet TDS probe along the direction of water flow . 5. A reverse osmosis water purification system according to claim 1, characterized in that a booster pump is arranged between the water inlet TDS probe and the RO reverse osmosis filter. 6. A reverse osmosis water purification system according to any one of claims 1-5, characterized in that, said RO reverse osmosis filter is provided with said RO reverse osmosis filter is provided with a concentrated water outlet water outlet and a pure water outlet. 7. A reverse osmosis water purification system according to claim 6, characterized in that the water inlet of the rear filter is connected to the pure water outlet. 8. A reverse osmosis water purification system according to claim 6, characterized in that the concentrated water outlet is connected with a flushing solenoid valve. 9. A reverse osmosis water purification system according to claim 6, characterized in that, between the pure water outlet of the RO reverse osmosis filter and the post-filter, a pure water end is sequentially arranged along the water flow direction Check valve, pure water end high pressure switch and water outlet TDS probe. 10. A reverse osmosis water purification system according to claim 1, characterized in that the water passing through the pre-filter communicates with the pure water faucet through a pipeline.