CN108503053A - Water purification system and water purification and production method - Google Patents

Abstract

The invention provides a water purification system, comprising a pre-filter, a water inlet solenoid valve, a booster pump, a reverse osmosis filter and a post-filter sequentially connected through pipelines, the pre-filter is connected through a low-pressure switch It is connected to the tap water pipe, the post filter is connected to the pure water faucet, and the reverse osmosis filter and the post filter are sequentially connected in series with a water production TDS detector, a water outlet solenoid valve and a high pressure switch. Between the water inlet end of the booster pump and the water outlet end of the water production TDS detector, a bypass pipeline for returning the water production is connected in parallel. The invention also provides a method for purifying water and producing water by using the water purifying system.

Description

A water purification system and water purification method

technical field

The invention relates to a water purification system, in particular to a water purification system capable of solving the problem of exceeding the standard TDS of the effluent of a reverse osmosis water purification system, and a water production method using the water purification system.

Background technique

With the increasingly serious pollution of water resources, water purifiers have been widely used, and the reverse osmosis water purifier with the best filtering effect has been favored unprecedentedly. Especially the reverse osmosis water purifier with large flow is popular in the market at present. The large flow reverse osmosis water purifier cancels the pressure barrel that may breed bacteria and produce peculiar smell. However, when the water purifier is not used for a long time, limited by the characteristics of the reverse osmosis membrane itself, when the water is taken for the first time, the initial pure water TDS will exceed the standard. For users, water is used most often for the first time, which results in the pure water used most of the time being 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, a yellow light is displayed, and when the TDS is normal, a green light is displayed, and the user is notified to start drinking water until the green light is on. This setting has brought troubles to users, because the water is always flowing. After turning on the pure water tap, the water with TDS exceeding the standard due to temporary storage is still filtered pure water, but it can only be discharged in vain and cannot Using it artificially causes double waste of water and electricity, and the user experience is very poor.

Contents of the invention

The main purpose of the present invention is to solve the above-mentioned problems and deficiencies, and provide a water purification system and a water purification method that can be re-filtered by adjusting the waterway system and returning the water that does not meet the TDS standard of the outlet water.

To achieve the above object, the present invention firstly provides a water purification system:

A water purification system, comprising a pre-filter, a water inlet solenoid valve, a booster pump, a reverse osmosis filter and a post-filter connected sequentially through pipelines, the pre-filter is connected to a tap water pipe through a low-pressure switch connected, the post-filter is connected to the pure water faucet, and the reverse osmosis filter and the post-filter are sequentially connected in series with a water production TDS detector, a water outlet solenoid valve and a high-pressure switch. Between the water inlet end of the pressure pump and the water outlet end of the TDS detector for water production, there is a bypass pipeline for returning the water production.

Further, when the water production TDS detector detects that the water production TDS value is higher than the preset value, the water outlet solenoid valve is closed, the bypass pipeline is turned on, and the water production backflow enters the reverse osmosis again. filter.

Further, a one-way bypass solenoid valve is provided on the bypass pipeline, and when the bypass solenoid valve is opened, the produced water can flow back to the reverse osmosis filter.

Further, the water outlet end of the bypass pipeline communicates with the water inlet end of the booster pump.

Further, the pipeline is also provided with a temperature sensor, the temperature sensor senses the water temperature in the pipeline, and the system converts the detected TDS value into a TDS value under standard conditions according to the measured water temperature.

Further, the post filter has a pressure air bag, and the air pressure setting and water outlet rate of the post filter match the water production capacity of the reverse osmosis filter.

At the same time, the present invention also provides a method for purifying water and producing water by using the aforementioned water purification system:

Using the water purification system mentioned above, when the user turns on the pure water tap, the high-pressure switch detects that the pressure value is lower than the predetermined value and feeds back the pressure information to the control system, turns on the water inlet solenoid valve and the booster pump, and the tap water passes through the tap water interface, the front The filter and the booster pump enter the reverse osmosis filter. When the water TDS detector detects that the TDS value of the water is higher than the preset value, the water outlet solenoid valve is closed, the bypass pipeline is opened, and the water coming out of the reverse osmosis filter The pure water flows back to the reverse osmosis filter through the bypass pipeline, and then undergoes reverse osmosis filtration again, while the pure water stored in the post filter flows out from the pure water faucet; when the TDS value of the detected water is lower than the preset value, or When the TDS value of the water produced after repeated reverse osmosis filtration is lower than the preset value, the bypass pipeline is closed, the water outlet solenoid valve is opened, and the pure water flows out from the pure water faucet through the post-filter; when the user closes the pure water For water faucets, since the pressure of the high-pressure switch is not higher than the closing value, the system continues to produce water, and the pure water produced is stored in the post-filter. When the pressure in the post-filter reaches the closing value of the high-pressure switch, the entire water purification system stop working.

Further, the post filter has a pressure air bag, and the air pressure setting and water outlet rate of the post filter match the water production capacity of the reverse osmosis filter.

Further, a temperature sensor is provided at the water outlet end of the pre-filter. During the water production process, the system first receives the real-time water temperature information transmitted from the temperature sensor, and according to the water temperature information, the subsequent detected water production The TDS value is converted to the TDS value under standard conditions, and then compared with the preset value.

Furthermore, when it is detected that the TDS value of the water is higher than the preset value, and the TDS value of the pure water is still higher than the preset value after repeated reverse osmosis filtration within the specified time of the system, the system prompts that the reverse osmosis The permeation filter life expires or the water purification system has problems, the user can maintain it according to the actual situation.

In summary, the present invention provides a water purification system and a water purification method. By adjusting the water system and setting a bypass water channel, the pseudo-pure water that exceeds the standard TDS from the reverse osmosis filter is automatically bypassed. Through the backflow, all the water that reaches the user's drinking cup is qualified pure water, which solves the problem of exceeding the standard TDS of the first water output of the large-flow reverse osmosis water purifier; the bypass pipeline is adopted to make the filtering effect of the system fully automatic adjustment ;Set the temperature sensor to convert the real-time detected TDS data under non-standard conditions into TDS values under standard conditions, reducing the measurement deviation caused by water temperature; set the pressure airbag, when the pure water tap is turned off, the water purification system continues to work, The post-filter stores qualified pure water. The air pressure setting and water output rate of the post-filter match the water production capacity of the reverse osmosis filter, which avoids delays when users take water and improves user experience.

Description of drawings:

Figure 1: A schematic diagram of the composition of the water system in the present invention;

Among them: tap water interface 1, low pressure switch 2, origami filter element 3, front carbon rod 4, temperature sensor 5, water inlet solenoid valve 6, water inlet TDS detector 7, booster pump 8, reverse osmosis filter 9, water production TDS detector 10, water outlet solenoid valve 11, high pressure switch 12, rear carbon rod 13, pressure air bag 14, water outlet TDS detector 15, pure water interface 16, air hole 17, waste water ratio 18, flushing solenoid valve 19, concentrated water Interface 20, pipeline 21, bypass solenoid valve 22.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

The present invention firstly provides a water purification system, including a pre-filter, a water inlet solenoid valve 6, a booster pump 8, a reverse osmosis filter 9 and a post-filter sequentially connected through a pipeline 21, and the pre-filter The low-pressure switch 2 is connected to the tap water pipe, the post-filter is connected to the pure water faucet, and the reverse osmosis filter 9 and the post-filter are sequentially connected in series with a water production TDS detector 10, a water outlet solenoid valve 11 and a high-pressure switch. 12. Between the water inlet end of the booster pump 8 and the water outlet end of the water TDS detector 11, there is a bypass pipeline that can make the water flow back.

As shown in Figure 1, the origami filter element 3 and the pre-carbon rod 4 are connected in series through the pipeline 21 to form a pre-filter. Generally, the origami filter element 3 is arranged at the water inlet end of the pre-carbon rod 4, and the water inlet of the origami filter element 3 The terminal is connected to the tap water interface 1 through the low-pressure switch 2, so as to be connected to the tap water pipe. The low-pressure switch 2 detects the water inlet pressure, and controls the connection or closure with the tap water interface 1 through the water inlet solenoid valve 6. The water outlet of the front carbon rod 4 The end is connected with the booster pump 8 through the water inlet solenoid valve 6, and the clean water from the pre-filter enters the reverse osmosis filter 9 after passing through the booster pump 8. By setting the booster pump 8, the pre-carbon rod can be 4. The clean water that comes out enters the reverse osmosis filter 9 with a stable pressure, avoiding the instability of the pure water outlet caused by the unstable water pressure in the tap water pipe, improving the filtration performance of the reverse osmosis filter 9, and at the same time, it also prevents the reverse osmosis filter from entering the reverse osmosis filter. The purified water of 9 further improves the filtration capacity of reverse osmosis filter 9 with a certain pressure. The composition of the pre-filter is not limited to the origami filter element 3 and the pre-carbon rod 4, and can also be a filter element of any shape or structure in the prior art, which can meet the requirements of the pre-filter.

Set the water TDS detector 10 at the water outlet of the reverse osmosis filter 9, detect the TDS value of the water produced from the reverse osmosis filter 9, and send it to the control system in real time, and compare it with the preset value built in the system to determine the real-time value. Whether the water TDS exceeds the standard. In order to solve the problem of TDS exceeding the standard produced by the water purification system, especially when starting up again after each shutdown, the TDS of the water produced from the reverse osmosis filter 9 exceeds the standard. A bypass pipeline is associated between the water inlet end of the booster pump 8 and the water outlet end of the water production TDS detector 10, and the bypass pipeline is arranged between the water inlet end of the booster pump 8 and the water production TDS detector 10. Between the water outlets, sufficient pressure can be provided for the return water to complete the return process. At the same time, it is not necessary to re-filter and purify the entire process to solve the problem of water TDS exceeding the standard, thereby reducing power consumption. Only a single Direct conduction, the conduction state is controlled by the bypass solenoid valve 22. During the water purification process, when the real-time detected water TDS value exceeds the system preset value, the system controls the water outlet solenoid valve 11 to close, and the bypass solenoid valve 22 opens. The water inlet solenoid valve 6 is still in the open state at this time, and the excess water from the reverse osmosis filter 9 flows back to the water inlet end of the booster pump 8 through the bypass pipeline, and after being stabilized/boosted by the booster pump 8 , re-enter the reverse osmosis filter 9, and carry out reverse osmosis treatment on the excess water again, and the water produced from the reverse osmosis filter 9 again detects the TDS value through the water TDS detector 10 and compares it with the system preset value , if it still exceeds the standard, continue to flow back, reverse osmosis treatment in reciprocating cycles, until the TDS value of the water is lower than the system preset value, close the bypass solenoid valve 22, open the water outlet solenoid valve 11, and the water that meets the TDS standard requirements passes through the high pressure switch 12 In the post filter, in the present invention, the post filter adopts the post carbon rod 13, after being filtered again by the post carbon rod 13, pure water is formed, which flows out from the pure water interface 16 for the user.

In the present invention, when it is detected that the TDS value of the water produced is higher than the set value, and the TDS value of the pure water is still higher than the preset value after multiple reflux cycles of reverse osmosis filtration within the time T specified by the system, the system will prompt If it is determined that the life of the reverse osmosis filter has expired or there is a problem with the water purification system, the user can perform maintenance according to the actual situation. The water process is to import the produced water from the reverse osmosis filter 9 to the post-filter and provide it to the user. The time T of reverse osmosis filtration for multiple reflux cycles can be set according to the storage capacity of the post-filter. For example, the time T of reverse osmosis filtration for a secondary reflux cycle is less than the time it takes for all the pure water stored in the post-filter to be taken out at one time. . When it is detected that the TDS value of water production is higher than the set value, the system will provide pure water to the user from the post-filter. Circulating reverse osmosis filtration to replenish the pure water taken away by the post filter. When the backflow time reaches time T and the TDS of water production is still exceeding the standard, the post filter cannot be entered. The system prompts that the life of the reverse osmosis filter has expired Or if there is a problem with the water purification system, the user can perform maintenance according to the prompts and the actual situation. At the same time, the system controls to forcefully end the backflow process, close the bypass pipeline and the bypass solenoid valve 22, and open the water outlet solenoid valve 11 to replenish the post filter. pure water.

During the reflux process, the water inlet solenoid valve 6 is in an open state, and the TDS exceeding-standard water and the preliminary purified water filtered by the pre-filter converge and then enter the booster pump 8 to solve the reduction of the water production during the continuous reflux process The problem is to provide sufficient water source for the reverse osmosis filter 9 in the working state, to protect the life of the reverse osmosis filter 9, and to provide users with a stable flow of pure water effluent.

There is also an outlet TDS detector 15 on the pipeline at the water outlet of the rear carbon rod 13, which is used to detect the final pure water TDS value and compare it with the system’s outlet TDS preset value. When the pure water TDS value exceeds the standard alarm, Indicates that the life of the rear carbon rod 13 has expired, or the pure water stored in the rear carbon rod 13 has deteriorated due to long-term non-use. When a certain amount of pure water is released and the TDS of the pure water still exceeds the standard, the rear carbon rod needs to be replaced 13. A pressure air bag 14 is arranged at the bottom of the rear carbon rod 13. When the pure water tap is closed, the qualified water from the reverse osmosis filter 9 is stored in the rear carbon rod 13. When the rear carbon rod 13 is full Water, when the air pressure reaches the setting value of the high pressure switch 12, the system closes the water inlet solenoid valve 6, the booster pump 8, the water outlet solenoid valve 11, and closes the whole water purification system. The pressure air bag 14 is set so that when the user opens the pure water faucet and the TDS exceeds the standard and needs to be refluxed to provide pure water, the standard pure water stored in the rear carbon rod 13 is under the pressure of the pressure air bag 14. Set the carbon rod 13 to flow out for the user to avoid the problem of water intake delay caused by the temporary inability to provide qualified pure water due to the water TDS exceeding the standard. The pressure air bag 14 is provided with an air hole 17, and when the pressure in the pressure air bag 14 is insufficient, the pressure air bag 14 can be inflated and pressurized through the air hole 17. The pressure air bag 14 is not limited to being arranged at the bottom of the rear carbon rod 13, but can be arranged at any position of the rear carbon rod 14, as long as it can play a corresponding role. The air pressure setting and water output rate of the post-filter match the water production capacity of the reverse osmosis filter 9 to provide users with a better experience.

The reverse osmosis filter 9 communicates with the concentrated water interface 20 through the pipeline 21, and the concentrated water produced by the reverse osmosis filter 9 in the process of producing pure water is discharged to the sewer or other concentrated water recovery channels through the concentrated water interface 20. The pipeline 21 between the concentrated water interface 20 and the reverse osmosis filter 9 is provided with a waste water ratio 18 and a flushing solenoid valve 19 connected in parallel with the waste water ratio 18 for flushing the reverse osmosis filter 9 .

On the pipeline 21 between the water inlet solenoid valve 6 and the booster pump 8, a water inlet TDS detector 7 is provided to detect the TDS value of the purified water entering the reverse osmosis filter 9, as whether the water TDS value is Exceeding the detection basis.

On the pipeline 21 at the water outlet end of the front carbon rod 4, a temperature sensor 5 is installed to sense the temperature of the water flow in the pipeline 21. When the water temperature is not in the standard condition of 25°C, the system will transmit the real-time water temperature according to the real-time detected water temperature. The TDS value is converted into the TDS value under the standard condition of 25°C, and the converted TDS value is compared with the corresponding preset value to avoid judgment errors caused by changes in the TDS value under different water temperature conditions. Set the temperature sensor 5 at the water outlet end of the front carbon rod 4. At this time, the water temperature is basically stable, close to room temperature, and there will not be much change when the pure water comes out, so as to avoid detection errors. At the same time, first detect the water temperature, Then detect the TDS value of each stage to avoid the time error generated in the conversion process and improve the detection accuracy.

The present invention also provides a water purification method using this water purification system. When the user turns on the pure water tap, the high pressure switch 12 detects that the current pressure value is lower than the predetermined value and feeds back the detection information to the system, and the system controls to open the water inlet. Solenoid valve 6, booster pump 8, tap water enters reverse osmosis filter 9 through tap water interface 1, pre-filter, booster pump 8, when water TDS detector 10 detects that the water TDS value is higher than the preset value, The water outlet solenoid valve is closed 12, the bypass pipeline is turned on, and the produced water from the reverse osmosis filter 9 flows back to the reverse osmosis filter 9 through the bypass pipeline, and is filtered by reverse osmosis again, and is stored in the post-filter The pure water flows out from the pure water faucet; when it is detected that the TDS value of the water is lower than the preset value, or the TDS value of the water after repeated reverse osmosis filtration is lower than the preset value, the bypass pipeline is closed , open the water outlet solenoid valve 11, and the produced water flows out from the pure water faucet through the post filter; when the user closes the pure water faucet, since the pressure of the high pressure switch 12 is not higher than the closing value, the system continues to produce water, and the produced pure water is stored in In the post-filter, when the pressure in the post-filter reaches the closing value of the high-pressure switch 12, the system closes the low-pressure switch 2, the water inlet solenoid valve 6, the booster pump 8, and the water outlet solenoid valve 11, and the entire water purification system stops working .

The conduction state of the bypass pipeline is controlled by the bypass solenoid valve 22, and only one-way flow is possible. The water outlet of the bypass pipeline communicates with the water inlet of the booster pump 8 .

In the water purification process, the post filter has a pressure air bag 14, and the air pressure setting and water output rate of the post filter match the water production capacity of the reverse osmosis filter 9. When it is detected that the TDS value of the water production is higher than the preset value, the water outlet solenoid valve 11 is closed, and under the action of the pressure air bag 14, the pure water stored in the rear carbon rod 13 flows out through the pure water interface 16 for use by the user. When the pressure air bag 14 is insufficient in pressure, the air pressure can be supplemented by the blow hole 17.

A temperature sensor 5 is installed at the water outlet end of the front carbon rod 4. During the water production process, the system first receives the real-time water temperature information from the temperature sensor 5, and converts the subsequent detected TDS value according to the water temperature information. Various TDS values under non-standard conditions are converted into TDS values under standard conditions, and then compared with preset values to avoid changes in TDS values caused by differences in water temperature and improve detection accuracy.

In the present invention, when it is detected that the TDS value of the water produced is higher than the set value, and the TDS value of the pure water is still higher than the preset value after multiple reflux cycles of reverse osmosis filtration within the time T specified by the system, the system will prompt If it is determined that the life of the reverse osmosis filter has expired or there is a problem with the water purification system, the user can perform maintenance according to the actual situation. The water process is to import the produced water from the reverse osmosis filter 9 to the post-filter and provide it to the user. The time T of reverse osmosis filtration for multiple reflux cycles can be set according to the storage capacity of the post-filter. For example, the time T of reverse osmosis filtration for a secondary reflux cycle is less than the time it takes for all the pure water stored in the post-filter to be taken out at one time. . When it is detected that the TDS value of water production is higher than the set value, the system will provide pure water to the user from the post-filter. Circulating reverse osmosis filtration to replenish the pure water taken away by the post filter. When the backflow time reaches time T and the TDS of water production is still exceeding the standard, the post filter cannot be entered. The system prompts that the life of the reverse osmosis filter has expired Or if there is a problem with the water purification system, the user can perform maintenance according to the prompts and the actual situation. At the same time, the system controls to forcefully end the backflow process, close the bypass pipeline and the bypass solenoid valve 22, and open the water outlet solenoid valve 11 to replenish the post filter. pure water.

In summary, the present invention provides a water purification system and a water purification method. By adjusting the water system and setting a bypass water channel, the pseudo-pure water that exceeds the standard TDS from the reverse osmosis filter is automatically bypassed. Through the backflow, all the water that reaches the user's drinking cup is qualified pure water, which solves the problem of exceeding the standard TDS of the first water output of the large-flow reverse osmosis water purifier; the bypass pipeline is adopted to make the filtering effect of the system fully automatic adjustment ;Set the temperature sensor to convert the real-time detected TDS data under non-standard conditions into TDS values under standard conditions, reducing the measurement deviation caused by water temperature; set the pressure airbag, when the pure water tap is turned off, the water purification system continues to work, The post-filter stores qualified pure water. The air pressure setting and water output rate of the post-filter match the water production capacity of the reverse osmosis filter, which avoids delays when users take water and improves user experience.

As mentioned above, a similar technical solution can be derived in combination with the content of the given solution. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are still within the scope of the technical solutions of the present invention.

Claims (10)

1. Include the fore filter being linked in sequence by pipeline, entering water electromagnetic valve, booster pump, reverse osmosis 1. a kind of water cleaning systems Filter and post-filter, the fore filter are connected through low tension switch and water pipe, the post-filter with Pure water tap is connected, it is characterised in that：Sequential series have water processed between the reverse osmosis filter and the post-filter TDS detectors, water solenoid valve and high-voltage switch gear, in the water outlet of the water inlet end and the water TDS detectors processed of the booster pump The bypass line of water reflux processed can be made by being parallel between end.
2. 2. a kind of water cleaning systems as described in claim 1, it is characterised in that：When the water TDS detectors processed detect water processed When TDS values are higher than preset value, the water solenoid valve is closed, and the bypass line conducting, water reflux processed is re-introduced into described Reverse osmosis filter.
3. 3. a kind of water cleaning systems as claimed in claim 2, it is characterised in that：The bypass line is equipped with unidirectional bypass electromagnetism Valve, when the bypass solenoid valve is opened, the water reverse osmosis filter processed.
4. 4. a kind of water cleaning systems as claimed in claim 2, it is characterised in that：The water outlet of the bypass line and the supercharging The water inlet end of pump is connected to.
5. 5. a kind of water cleaning systems as described in claim 1, it is characterised in that：Temperature sensor, institute are additionally provided on the pipeline The water temperature in temperature sensor perception pipeline is stated, the TDS values detected are converted under standard conditions by system according to actual measurement water temperature TDS values.
6. 6. such as a kind of water cleaning systems described in any one of claim 1 to 5, it is characterised in that：The post-filter is with pressure Strength capsule, the air pressure setting of the post-filter and the water-making ability of the rate of output water and reverse osmosis filter match.
7. 7. a kind of water purification process for preparing water, it is characterised in that：Using such as claim 1 to 6 any one of them water cleaning systems, when with Pure water tap is opened at family, and high-voltage switch gear detects pressure value less than predetermined value and feedback pressure information to control system, open into Water solenoid valve, booster pump, tap water enter reverse osmosis filter through tap water interface, fore filter, booster pump, when water processed TDS detectors detect that water TDS values processed are higher than preset value, and water solenoid valve is closed, and open bypass line conducting, are penetrated from reverse osmosis The pure water that filter comes out flows back into reverse osmosis filter through bypass line, carries out osmosis filtration again, and is stored in postposition mistake Pure water in filter is flowed out from pure water tap；When detection water TDS values less than preset value, or through multi-reflow recycle instead When water TDS values processed after permeation filtration are less than preset value, bypass line is closed, opens water solenoid valve, pure water is filtered through postposition Device is flowed out from pure water tap；When user's closing pure water tap, since the pressure of high-voltage switch gear is not yet higher than close value, system Continuing water processed, produced pure water is stored in post-filter, when the pressure in post-filter reaches the close value of high-voltage switch gear, Entire water cleaning systems are stopped.
8. 8. a kind of water purification process for preparing water as claimed in claim 7, it is characterised in that：The post-filter carries pressure gas Capsule, the air pressure setting of the post-filter and the water-making ability of the rate of output water and reverse osmosis filter match.
9. 9. a kind of water purification process for preparing water as claimed in claim 7, it is characterised in that：It is set in the water outlet of the fore filter There is temperature sensor, during water processed, system receives the water temperature information that the temperature sensor transmits in real time first, and according to Water temperature information, the water TDS values processed come to subsequent detection are converted into TDS values under standard conditions, then are compared with setting value.
10. 10. a kind of water purification process for preparing water as claimed in claim 7, it is characterised in that：It is set when detecting that water TDS values processed are higher than Value, in the time as defined in system, after multi-reflow recycles osmosis filtration, when pure water TDS values remain above preset value, system Prompt assert that the reverse osmosis filter service life expires or water cleaning systems go wrong, and user can safeguard according to actual conditions.