CN113731174A - Water purification system control method and water purification system - Google Patents
Water purification system control method and water purification system Download PDFInfo
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- CN113731174A CN113731174A CN202010481177.3A CN202010481177A CN113731174A CN 113731174 A CN113731174 A CN 113731174A CN 202010481177 A CN202010481177 A CN 202010481177A CN 113731174 A CN113731174 A CN 113731174A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/08—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/027—Nanofiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/10—Accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/12—Controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/44—Time
- C02F2209/445—Filter life
Abstract
The invention discloses a water purification system and a control method thereof, wherein the water purification system is provided with a first electromagnetic valve and a parallel flushing filter element on a pipeline between a water outlet of a booster pump and a water inlet of a main filter element, a main filter element backflushing pipeline is arranged between the water inlet of the booster pump and the water outlet of the main filter element, and a third electromagnetic valve is arranged on the main filter element backflushing pipeline; after system water stops, open first and third solenoid valve, the former water enters main filter core and carries out before the membrane of main filter core and washes, the pure water backward flow that produces simultaneously mixes with the former water before the booster pump, reduce to first default after the TDS value of main filter core membrane front side waste water, close first and third solenoid valve, open and wash filter core waste water solenoid valve, carry out the washing before the membrane by washing the filter core to main filter core, stop when its waste water mouth TDS value is less than the second default, solve the problem of first cup water TDS height and avoid the crystallization of waterway system key component.
Description
Technical Field
The invention belongs to the technical field of water purification, and particularly relates to a control method of a water purification system and the water purification system.
Background
RO water purification machines (or RO reverse osmosis water purification machines/RO water purification machines) are water purification machines that use the principle of reverse osmosis technology for water filtration, and RO reverse osmosis technology is widely used in various fields such as military, medical treatment, industry, civilian use, and the like. Is known as one of the six high technologies in this century.
Along with the increasing severity of environmental pollution and water pollution, the drinking water health of people is seriously threatened, and the RO machine water purification technology is a better way for preparing purified water because various harmful impurities, heavy metals, viruses, bacteria and the like in water can be removed, the efficiency is high, and the removal is thorough.
However, due to the nature of the RO membrane, the water before the membrane and the water after the membrane tend to approach each other after standing for a while by ion diffusion TSD, resulting in a higher TDS of the first cup of pure water. In addition, after a period of time of use, especially for areas with high water hardness, the high concentration of raw water ions on the raw water side of the membrane surface can cause membrane surface crystallization, wherein the joint of the RO membrane bottom and a wastewater port is easy to crystallize, and the membrane blockage is caused.
Disclosure of Invention
The invention aims to provide a water purification system and a control method thereof, wherein a mode of mixing and cleaning pure water generated by a main filter element and raw water and washing the pure water generated by a washing filter element is adopted to carry out pre-membrane cleaning on the main filter element, so that the technical problem that the TDS of the first cup of water of the existing water purifier is higher is solved, and during the washing period, the TDS value before the membrane of the main filter element is controlled below a second preset value through TDS detection of a waste water port of the main filter element, so that the technical effects of intelligently adjusting the washing time and water quantity, preventing crystallization at the joint of a membrane surface, a membrane bottom and the waste water port and avoiding the occurrence of a membrane blocking condition are realized.
In order to solve the technical problems, the invention adopts the following technical scheme:
a water purification system is proposed, comprising: a water inlet pipeline and a pure water outlet pipeline; a water inlet of the booster pump is connected with the water inlet pipeline; the water inlet of the main filter element is connected with the water outlet of the booster pump, and the water outlet of the main filter element is connected with the pure water outlet pipeline; further comprising: the main filter element backflushing pipeline is connected between a water inlet of the booster pump and a water outlet of the main filter element; a water inlet of the flushing filter element is connected with a water outlet of the booster pump, and a water outlet of the flushing filter element is connected with a water inlet of the main filter element; a waste water opening of the filter element flushing electromagnetic valve is provided with a filter element flushing waste water electromagnetic valve which is closed when the main filter element produces water; the first electromagnetic valve is arranged on a pipeline between the water outlet of the booster pump and the water inlet of the main filter element; and the third electromagnetic valve is arranged on the main filter element flushing pipeline.
Further, the system further comprises: the flushing filter element backflushing pipeline is connected between a water inlet of the booster pump and a water outlet of the flushing filter element; and the fourth electromagnetic valve is arranged on the flushing filter element flushing pipeline.
Further, the system further comprises: the first detection device is installed in the waste water port of the main filter element and used for detecting the TDS value of the waste water port of the main filter element.
Further, the system further comprises: and the second detection device is arranged on the water inlet pipeline and used for detecting the TDS value of the raw water.
Further, the system further comprises: a main filter element wastewater return pipeline connected between the main filter element wastewater pipeline and the water inlet pipeline, and provided with a fifth electromagnetic valve
A control method of a water purification system is provided, which is applied to the water purification system, and the water purification system comprises: a water inlet pipeline and a pure water outlet pipeline; a water inlet of the booster pump is connected with the water inlet pipeline; the water inlet of the main filter element is connected with the water outlet of the booster pump, and the water outlet of the main filter element is connected with the pure water outlet pipeline; the main filter element backflushing pipeline is connected between a water inlet of the booster pump and a water outlet of the main filter element; a water inlet of the flushing filter element is connected with a water outlet of the booster pump, and a water outlet of the flushing filter element is connected with a water inlet of the main filter element; a waste water opening of the filter element flushing electromagnetic valve is provided with a filter element flushing waste water electromagnetic valve which is closed when the main filter element produces water; the first electromagnetic valve is arranged on a pipeline between the water outlet of the booster pump and the water inlet of the main filter element; the third electromagnetic valve is arranged on the main filter element flushing pipeline; the method comprises the following steps: after water production is stopped, opening the first electromagnetic valve and the third electromagnetic valve; controlling the booster pump to operate so that raw water enters the main filter element, and enabling pure water filtered by the main filter element to flow to a water inlet of the booster pump through a main filter element backflushing pipeline to be mixed with the raw water; when set conditions are met, closing the first electromagnetic valve and the third electromagnetic valve, and opening the filter element flushing wastewater electromagnetic valve so that pure water generated by the flushing filter element enters the main filter element to perform pre-membrane flushing; the set condition is set execution time length, or the TDS value of the waste water port of the main filter element is smaller than a first preset value.
Further, when the pure water generated by the flushing filter element enters the main filter element to perform pre-membrane flushing, the method further comprises the following steps: and detecting the TDS value of the waste water port of the main filter element, and closing the third electromagnetic valve and controlling the heightening pump to stop running until the TDS value is smaller than a second preset value.
Further, the water purification system still includes: the flushing filter element backflushing pipeline is connected between a water inlet of the booster pump and a water outlet of the flushing filter element; the fourth electromagnetic valve is arranged on the flushing filter element return pipeline; the method further comprises the following steps: closing the first solenoid valve and the third solenoid valve; open the fourth solenoid valve to and control the booster pump operation, so that raw water gets into wash the filter core, the warp wash the filterable pure water warp of filter core wash the filter core backwash pipeline and flow to the water inlet of booster pump mixes with raw water.
Further, the method further comprises: obtaining a raw water TDS value; limiting the first preset value to be less than or equal to a set multiple of the TDS value of the raw water; and limiting the second preset value to be less than or equal to the TDS value of the raw water.
Further, the water purification system still includes: the main filter element wastewater return pipeline is connected between the main filter element wastewater pipeline and the water inlet pipeline, and a fifth electromagnetic valve is installed on the main filter element wastewater return pipeline; when the pure water generated by the flushing filter element enters the main filter element to perform pre-membrane flushing, the method further comprises the following steps: and opening the fifth electromagnetic valve to enable the wastewater of the main filter element to flow back to the booster pump through the main filter element wastewater return pipeline and be mixed with raw water.
Further, the method further comprises: and sending prompt information for exchanging, installing and using the main filter element and the flushing filter element when the service life or the service time of the main filter element reaches a set critical value.
Compared with the prior art, the invention has the advantages and positive effects that: in the water purification system and the control method thereof, a flushing filter element is connected in parallel on a pipeline between a water outlet of a booster pump and a water inlet of a main filter element, a main filter element backflushing pipeline is arranged between the water inlet of the booster pump and the water outlet of the main filter element, a first electromagnetic valve is arranged on the pipeline between the water outlet of the booster pump and the water inlet of the main filter element, and a third electromagnetic valve is arranged on the main filter element backflushing pipeline; when water is purified, the electromagnetic valve for flushing the filter element wastewater is closed, the first electromagnetic valve is opened, and the main filter element outputs the pure water; after the water purification, open first solenoid valve and third solenoid valve, control the booster pump operation, make the raw water get into main filter core, implement the raw water and filter the back and produce the pure water, the pure water flows to the water inlet and the raw water mixture of booster pump through main filter core backwash pipeline, continue to implement above-mentioned process, until the waste water mouth TDS value is less than first default after, close first solenoid valve and third solenoid valve, open and wash filter core waste water solenoid valve, the raw water gets into and washes the filter core, it enters main filter core to wash the pure water that the filter core filtered the back production, carry out before the membrane to main filter core and wash, make the main filter core inboard all soaked by the pure water of lower TDS value, make the first cup of water that flows out after the start once more be the pure water that the TDS value is low, solve the technical problem that the first cup of current purifier TDS is high.
In addition, according to the invention, the main filter element is firstly cleaned before the membrane based on the mixed water of the pure water and the raw water until the set execution time is up, or the TDS value of the waste water port of the main filter element is lower than the first preset value, and then the switching control mode of flushing the filter element to flush the pure water is switched, the mixed flushing of the raw water and the pure water at the early stage can form an internal circulation system, so that the TDS value of the water before the membrane is greatly reduced, the TDS value of the waste water port can be quickly reduced to the range of the second preset value when the pure water is flushed at the later stage, the working time of flushing the filter element can be reduced, the cleaning efficiency of the front-back switching mode is higher, the water is saved, and the service time of flushing the filter element is prolonged.
Furthermore, during the period that the flushing filter element flushes the main filter element, the TDS value of the waste water port of the main filter element is detected through the first detection device, along with the flushing of pure water generated by the flushing filter element, the TDS value in front of the membrane of the main filter element is further gradually reduced, namely the TDS value of the waste water port is gradually reduced, and when the TDS value is reduced to be less than or equal to a second preset value, the waste water electromagnetic valve for flushing the filter element is controlled to be closed, the booster pump is controlled to stop running, and the flushing of the main filter element is finished; the second preset value can be set to be the TDS value of pure water preparation to the minimum, so that after the water purification system is in standby, the water purification system is kept in the TDS state of pure water before and after the main filter element membrane, the membrane surface, the membrane bottom and the waste water port connecting part are prevented from crystallizing, the waterway system and key components are maintained to the maximum extent to be clean, and the self-cleaning effect of the water purification system is achieved.
Furthermore, compared with the existing fixed time or fixed water quantity washing mode, the method is based on the detection of the TDS value of the waste water inlet, and even under the condition of different water qualities, the method can realize that the membranes of the main filter element are all in the same pure water soaking state based on different washing time and washing water quantity by combining the limitation of a second preset value, thereby achieving the technical effect of intelligently adjusting the washing time and the water quantity, solving the problem of RO membrane surface crystallization and saving water to the maximum extent.
Further, detect the raw water TDS value of inlet channel to use the raw water TDS value to inject first default and second default, make to wash and get up with actual quality of water relevance, make to wash and to carry out the differentiation according to different regional quality of water difference and wash.
Further, when washing before the filter core produces the pure water and carries out the membrane to main filter core and wash, the waste water that washes mixes with the raw water before flowing back to the booster pump through main filter core waste water return line, washes the filter core and uses this muddy water to produce the pure water and carry out the membrane to main filter core and wash, plays the technological effect of saving the washing water yield.
Further, when the life of the main filter element reaches a set critical value or the service life of the main filter element reaches the replacement time, a prompt of exchanging, installing and using the main filter element and the flushing filter element is sent, a user is prompted to install the flushing filter element and the exchange position of the main filter element, the flushing filter element executes the function of the main filter element, the main filter element executes the function of the flushing filter element, and the effect of fully and reasonably utilizing the filter element is achieved.
Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 is a structural view of a first embodiment of a water purification system according to the present invention;
fig. 2 is a structural view of a second embodiment of a water purification system according to the present invention;
fig. 3 is a structural view of a third embodiment of a water purification system according to the present invention;
FIG. 4 is a flow chart of a first embodiment of a control method for a water purification system according to the present invention;
FIG. 5 is a flow chart illustrating a control method of a water purification system according to a second embodiment of the present invention;
fig. 6 is a system configuration diagram of a fourth embodiment of the water purification system according to the present invention;
fig. 7 is a system configuration diagram of a fifth embodiment of the water purification system according to the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The water purification system provided by the invention comprises a water inlet pipeline 1, a pure water outlet pipeline 2, a booster pump 3, a main filter element 4, a flushing filter element 5 and a main filter element backflushing pipeline 41, as shown in figure 1; the water inlet of the booster pump 3 is connected with the water inlet pipeline 1; the water inlet of the main filter element 4 is connected with the water outlet of the booster pump 3, and the water outlet thereof is connected with the pure water outlet pipeline 2; the water inlet of the flushing filter element 5 is connected with the water outlet of the booster pump 3, and the water outlet thereof is connected with the water inlet of the main filter element 4; a first electromagnetic valve 6 is arranged on a pipeline between the water outlet of the booster pump 3 and the water inlet of the main filter element 4; a third solenoid valve 42 is mounted on the main cartridge backwash conduit 41.
A preposed main filter element component 01, such as a PPF primary filter, a UDF filter, a CTO filter and the like, is connected to the water inlet pipeline 1; a post main filter element component, such as a post active carbon filter, a water tap and the like, is connected to the pure water outlet pipeline 2.
The waste water port of the main filter element 4 is connected with a main filter element waste water pipeline 8, and a waste water electromagnetic valve 9 is connected on the main filter element waste water pipeline 8. A waste water port of the flushing filter element 5 is connected with a waste water pipeline 10, and a flushing filter element waste water electromagnetic valve 11 is installed on the waste water pipeline 10; a one-way valve 12 is arranged on a pipeline between the water outlet of the flushing filter element 5 and the water inlet of the main filter element 4.
According to the water purification system provided by the invention, when water is produced, the flushing filter element wastewater electromagnetic valve 11 and the third electromagnetic valve 42 are closed, the first electromagnetic valve 6 is opened, water enters the main filter element 4 and the flushing filter element 5 through the booster pump 3, and the flushing filter element wastewater electromagnetic valve 11 is closed, so that the water inlet resistance of the flushing filter element 5 is large, water flows into the main filter element 4, flows out of the pure water outlet pipeline 2 after being filtered by the main filter element 4, and flows out of the faucet after being filtered by the rear main filter element assembly.
The main filter element 4 can be an RO membrane main filter element and also can be an NF nanofiltration main filter element. The booster pump 3 can output two kinds of power, and is respectively suitable for the application of a water production mode and a cleaning mode.
In some embodiments of the present invention, the first solenoid valve 6 and the third solenoid valve 42 may be controlled to open after the water preparation is finished, and the operation of the booster pump 3 may be controlled, so that the main filter element 4 may mix the raw water with the self-prepared pure water at the water inlet before returning to the booster pump 3 through the main filter element backwash pipeline 41, and then the mixed water enters the main filter element 4, and the pre-membrane cleaning is performed on the main filter element 4, which is denoted as a first cleaning mode.
In some embodiments of the present invention, the pre-membrane flushing of the main filter element 4 by the pure water generated by the flushing filter element 5 can be realized by controlling the opening of the flushing filter element wastewater solenoid valve 11 and the operation of the booster pump 3 after the water production is finished, which is denoted as a second cleaning mode.
As shown in fig. 2, the water purification system of the present invention further includes a flushing filter element back flushing pipeline 51 and a fourth electromagnetic valve 52; a flushing filter element backwash pipeline 51 is connected between the water inlet of the booster pump 3 and the water outlet of the flushing filter element 5, and a fourth solenoid valve 52 is installed on the flushing filter element backwash pipeline 51.
In some embodiments of the present invention, during non-water production, the first solenoid valve 6 and the third solenoid valve 42 are controlled to be closed, the fourth solenoid valve 52 and the flushing filter element wastewater solenoid valve 11 are controlled to be opened, and the booster pump 3 is operated, so that pure water self-produced by the flushing filter element 5 is mixed with raw water through the water inlet before the flushing filter element backwash pipeline 51 returns to the booster pump 3, and then enters the flushing filter element 5, and pre-membrane cleaning is performed on the flushing filter element 5, which is denoted as a third cleaning mode.
In the embodiment shown in fig. 3, the water purification system of the present invention further includes a first detecting device 13 and a second detecting device 14; the first detection device 13 is installed at the waste water port of the main filter element 4 and is used for detecting the TDS value of the waste water port of the main filter element 4; the second detection device 14 is installed on the water inlet pipeline 1 and used for detecting the TDS value of the raw water. In some embodiments of the invention, the main filter element 4 and the flushing filter element 5 can be switched to work based on the detection and judgment of the TDS value of the waste water port and the TDS value of the raw water, so as to achieve the technical effects of cleaning the filter element before membrane, solving the problem of higher TDS value of the first cup of water, intelligently adjusting the flushing time and water quantity, preventing the membrane surface, the connection part of the touch bottom and the waste water port from crystallizing and avoiding the membrane blockage.
Specifically, based on the above proposed architecture of the water purification system, the present invention provides a control method of the water purification system, as shown in fig. 4, comprising the following steps:
and step S41, after the water production is stopped, opening the first electromagnetic valve and the third electromagnetic valve.
According to the water purification system provided by the invention, during water production, the electromagnetic valve 11 for flushing the filter element wastewater and the third electromagnetic valve 42 are closed, the first electromagnetic valve 6 and the booster pump 3 are opened, and after water production is finished, the booster pump 3 is closed.
In the embodiment of the present invention, after the water production is stopped, the third electromagnetic valve 42 is opened to switch the water path in preparation for implementing the first cleaning mode.
The time after the water production is stopped includes any time point after the water production is stopped, for example, when the water production is stopped, waiting for a predetermined time after the water production is stopped, or before the water production is stopped next time.
Step S42: and controlling the booster pump to operate so that raw water enters the main filter element to perform pre-membrane cleaning, and pure water filtered by the main filter element flows to a water inlet of the booster pump through the main filter element backwash pipeline to be mixed with the raw water.
After the water preparation is finished, the first electromagnetic valve 6 is kept opened and the operation of the booster pump 3 is controlled, and the third electromagnetic valve 42 is started immediately or after a short time interval, so that the first cleaning mode is implemented to perform pre-membrane cleaning on the main filter element 4.
After the first washing mode starts, the raw water enters into the waste water mixture before main filter core 4 and the membrane, and main filter core 4 will mix water system and be the pure water, and the pure water returns the entry that booster pump 3 was preceding through main filter core backwash pipeline 41 and mixes with the raw water again, and the mixed water continues to enter main filter core 4, and main filter core 4 recycles mixes water system pure water and flows back again, so sends repeatedly, gives the in-process, and the backward flow of pure water reduces the TDS value of main filter core 4 membrane water fast.
Step S43: and detecting the TDS value of the waste water port of the main filter element until the TDS value is smaller than a first preset value, closing the first electromagnetic valve and the third electromagnetic valve, and opening the waste water electromagnetic valve for washing the filter element so as to enable pure water generated by washing the filter element to enter the main filter element to perform pre-membrane cleaning.
In the embodiment of the invention, the execution duration is limited for the first cleaning mode, and the second cleaning mode is switched after the execution duration is reached; or, during the execution of the first cleaning mode, the water purification system acquires the TDS value of the waste water port detected by the first detection device 13, the TDS value of the waste water port gradually decreases along with the continuous execution of the first cleaning mode, and after the value of the waste water port falls to a first preset value, the water purification system is switched from the first cleaning mode to the second cleaning mode, namely, the first electromagnetic valve 6 and the third electromagnetic valve 42 are closed, the flushing filter element waste water electromagnetic valve 11 is opened, so that the flushing filter element 5 generates pure water which enters the main filter element 4 to execute pre-membrane flushing.
In the second cleaning mode, raw water flows into the flushing filter element 5 through the booster pump 3, flows into the main filter element 4 after being filtered by the flushing filter element 5, flushes the membrane front of the main filter element 4, and water with a high TDS value flows out through the wastewater electromagnetic valve 9, so that the TDS value of wastewater on the front side of the main filter element membrane is further reduced; the waste water for washing the filter element 5 flows out from the waste water electromagnetic valve 11 for washing the filter element.
Through the washing of second cleaning mode, 4 membrane raw water sides of main filter core can realize being soaked by the pure water of lower TDS value for the first cup of water that flows after starting again is the pure water that the TDS value is low, solves the technical problem that the first cup of water TDS value of current purifier is on the high side.
As shown in fig. 5, in some embodiments of the present invention, during the execution of the second washing mode, the following steps are also performed:
step S44: and detecting the TDS value of the waste water port of the main filter element until the TDS value is smaller than a second preset value, closing the third electromagnetic valve and controlling the booster pump to stop running.
During the pure water washing period of the main filter element 4 by using the washing filter element 5, the water purification system acquires the TDS value of the waste water port of the main filter element detected by the first detection device 13, compares the TDS value with the second preset value, maintains the second washing mode to be carried out when the TDS value is higher than the second preset value, closes the third electromagnetic valve 42 and stops the operation of the booster pump 3 until the TDS value of the waste water port is less than or equal to the second preset value, and finishes the washing of the main filter element 4.
It is above-mentioned visible, wash filter core 5 and erode main filter core 4 period, detect the waste water mouth TDS value of main filter core 4 through first detection device 13, along with washing away of the pure water that washes filter core 5 production, the TDS value before the 4 membranes of main filter core further reduces gradually, also the waste water mouth TDS value further reduces gradually, until it reduces to be less than the second default, just control and close third solenoid valve 42 and control booster pump 3 stall, the end is to washing of main filter core.
In a preferred embodiment of the present invention, before the first cleaning mode stops switching to the second cleaning mode, the first cleaning mode is switched to the second cleaning mode after waiting for a preset time, that is, standing for a period of time. The predetermined time here is preferably 5 to 10 minutes.
The purpose of setting the preset standing time is as follows: on the one hand, the water source is prevented from being wasted due to frequent flushing caused by frequent water consumption of a user, on the other hand, the fact that TDS (total dissolved solids) in a first cup of water exceeds the standard in the preset time is guaranteed, and pure water is maintained to be soaked behind a front membrane of a main filter element membrane.
Here, the purpose of first default setting lies in, set for a node, before this node, the pure water and the raw water mixture of main filter core 4 preparation, main filter core 4 makes the pure water backward flow with the mixed water again and mixes with the raw water, carry out repeatedly with the TDS value before the 4 membranes of quick reduction main filter core, play and make the second washing mode stage produce the pure water with washing the filter core and wash and can be very fast fall into the second default within range with main filter core waste water mouth TDS value 2, shorten the time that the second washing mode stage pure water washed, the effect of using water wisely, can also prolong the live time of washing the filter core, mode switching realizes higher cleaning efficiency before and after.
Compared with the problems of insufficient flushing and uncontrollable flushing state in a flushing mode with fixed time or fixed water quantity in the prior art, the mode for controlling the cleaning process based on the TDS value of the waste water port has the advantages that based on the detection of the TDS value of the waste water port, even under the condition of different water qualities, the membrane of the main filter element 4 is in a pure water soaking state based on different flushing time and flushing water quantity by combining the limitation of a second preset value, the technical effect of intelligently adjusting the flushing time and the water quantity is achieved, and the problem of RO membrane surface crystallization is solved.
In practical application, the upper limit of the flushing time can be limited, and the condition that flushing is ceaselessly performed due to faults or water quality is avoided.
This second default reaches best washing efficiency and effect as the principle with the pure water that satisfies to wash filter core 5 and produce to main filter core 4, general minimum is not less than the TDS value when washing filter core 5 stable system water, the maximum value does not let the first cup of water of system of stewing for a long time exceed standard, make water purification system after the standby, main filter core 4 membrane before all keep at pure water TDS state behind the membrane, thereby prevent the membrane surface, at the bottom of the membrane and waste water inlet connecting portion crystallization, furthest's the cleanness of maintaining waterway system and key parts, reach the effect of water purification system automatically cleaning.
In some embodiments of the present invention, the present invention detects the TDS value of the raw water based on the second detection device 14 installed on the water inlet pipeline, and the second preset value can be defined based on the TDS value of the raw water, and the second preset value is defined to be less than or equal to the TDS value of the raw water, preferably 0.15 times of the TDS value of the raw water, so as to associate the flushing with the local actual water quality, and enable the flushing to be cleaned according to different regional water quality differences.
In some embodiments of the present invention, the first preset value may be defined based on the raw water TDS value, the first preset value may be defined to be equal to or less than a set multiple of the raw water TDS value, and when the waste water port TDS value is detected to be equal to or less than the set multiple of the raw water TDS value, the first cleaning mode may be switched to the second cleaning mode until the waste water port TDS value is less than the second preset value.
The setting multiple is preferably 1.2, namely when the TDS value of the waste water port is reduced to 1.2 times of the TDS value of the raw water, the first electromagnetic valve 6 and the third electromagnetic valve are controlled to be closed, the flushing filter element waste water electromagnetic valve 11 is opened, and pure water generated by the flushing filter element 5 is used for flushing the main filter element 4.
In some embodiments of the invention, a third cleaning mode may also be activated, based on the configuration of the flushing cartridge backwash line 51 and the fourth solenoid valve 52, self-cleaning being performed by the flushing cartridge 5. Specifically, the cleaning may be performed after the main filter element 4 is cleaned, or performed at a set time node, or performed through user activation, and the like, and the present invention is not limited in particular.
After the third cleaning mode is started, the water purification system closes the first electromagnetic valve 6 and the third electromagnetic valve 42, opens the flushing filter element wastewater electromagnetic valve 11 and the fourth electromagnetic valve 52, controls the booster pump 3 to operate, adjusts the wastewater ratio of the flushing filter element wastewater electromagnetic valve 11 of the flushing filter element 5, enables raw water to enter the flushing filter element 5 to be filtered into pure water, the pure water flows to the water inlet of the booster pump 3 through the flushing filter element backwash pipeline 51 to be mixed with the raw water, the mixed water continuously enters the flushing filter element 5 to be filtered into pure water backwash, and repeats the above process until the end condition is met, the end condition can refer to the flushing end condition of the main filter element 4, and can also be realized by setting the flushing time.
In some embodiments of the present invention, as shown in fig. 7, the water purification system further includes a main filter wastewater return line 43 connected between the main filter wastewater return line 8 and the water inlet line 1, and a fifth solenoid valve 44 installed on the main filter wastewater return line 43; when the flushing filter element 5 filters pure water generated after raw water enters the main filter element 4 to perform pre-membrane flushing, the fifth electromagnetic valve 44 is controlled to be opened, so that the flushed wastewater flows back to the water inlet in front of the booster pump 3 from the main filter element wastewater return pipeline 43 to be mixed with the raw water, the mixed water enters the flushing filter element 5 again, and the flushing filter element 5 filters the pure water to continue to perform pre-membrane flushing on the main filter element 4. The connection point of the main filter wastewater return line 43 and the main filter wastewater line 8 is between the first detection device 13 and the wastewater solenoid valve 9.
Because the waste water TDS value of itself before the membrane of main filter core 4 is washed to the pure water is different, based on this main filter core waste water return line 43 and the project organization of fifth solenoid valve 44, can play the purpose of using water wisely to waste water reuse.
In a preferred embodiment of the invention, the main filter element 4 and the flushing filter element 5 can be used interchangeably to achieve a sufficiently rational application of the filter elements. Generally, the service life of the main filter element 4 is long and the frequency is high, while the service life of the flushing filter element 5 is short and the frequency is low, so the service life of the main filter element is shorter than that of the flushing filter element 5, correspondingly, as shown in fig. 6, the water purification system in this embodiment further includes a prompt module 15, when the service life of the main filter element 4 reaches a set critical value, for example, the set critical value is 80% of the service life, or 80% of the service life, and the like, the water purification system sends a prompt message to a user to prompt the user to exchange positions of the flushing filter element and the main filter element for use, the two filter elements after the exchange positions, the main filter element 4 performs a function of flushing the filter element based on the remaining 20% of the service life or the service life, and the flushing filter element 5 performs a function of the main filter element.
In some embodiments of the present invention, the transposition time of the main filter element 4 and the flushing filter element 5 is adjusted to a node, which ensures that the time left by the main filter element 4 for implementing pure water flushing is the same as the time left by the flushing filter element 5 for implementing the main filter element for water purification, so as to ensure that the two filter elements are exhausted at the same time, so that the user can replace the filter elements at the same time, and the complexity of replacing the filter elements by the user is reduced.
Generally, the flushing time is determined according to the actual filter flask structure and the volume size of the flushing filter element 5, and when the flushing filter element 5 and the main filter element 4 are not used interchangeably, the flushing time is determined according to the actual filter flask structure and the volume size of the two filter elements.
It should be noted that the above-mentioned estimation of the service life of the filter element according to the present invention is implemented by using the prior art means, but the present invention does not require the limited technical means.
It should be noted that the flushing mentioned in the present invention is a flushing action performed on the filter element when the wastewater solenoid valve of the filter element is in a fully open state; according to the cleaning method, the waste water electromagnetic valve of the filter element is opened according to the set waste water ratio, and waste water is discharged according to the waste water ratio during the water making of the filter element so as to realize the cleaning effect on the filter element membrane.
It should be noted that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should also make changes, modifications, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. A water purification system comprising:
a water inlet pipeline and a pure water outlet pipeline;
a water inlet of the booster pump is connected with the water inlet pipeline;
the water inlet of the main filter element is connected with the water outlet of the booster pump, and the water outlet of the main filter element is connected with the pure water outlet pipeline;
it is characterized by also comprising:
the main filter element backflushing pipeline is connected between a water inlet of the booster pump and a water outlet of the main filter element;
a water inlet of the flushing filter element is connected with a water outlet of the booster pump, and a water outlet of the flushing filter element is connected with a water inlet of the main filter element; a waste water opening of the filter element flushing electromagnetic valve is provided with a filter element flushing waste water electromagnetic valve which is closed when the main filter element produces water;
the first electromagnetic valve is arranged on a pipeline between the water outlet of the booster pump and the water inlet of the main filter element;
and the third electromagnetic valve is arranged on the main filter element flushing pipeline.
2. The water purification system of claim 1, further comprising:
the flushing filter element backflushing pipeline is connected between a water inlet of the booster pump and a water outlet of the flushing filter element;
and the fourth electromagnetic valve is arranged on the flushing filter element flushing pipeline.
3. The water purification system of claim 1 or 2, further comprising:
the first detection device is installed in the waste water port of the main filter element and used for detecting the TDS value of the waste water port of the main filter element.
4. The water purification system of claim 3, further comprising:
and the second detection device is arranged on the water inlet pipeline and used for detecting the TDS value of the raw water.
5. The water purification system of claim 1, further comprising:
and the main filter element wastewater return pipeline is connected between the main filter element wastewater pipeline and the water inlet pipeline, and a fifth electromagnetic valve is installed on the main filter element wastewater return pipeline.
6. A control method of a water purification system is applied to the water purification system, and the water purification system comprises:
a water inlet pipeline and a pure water outlet pipeline;
a water inlet of the booster pump is connected with the water inlet pipeline;
the water inlet of the main filter element is connected with the water outlet of the booster pump, and the water outlet of the main filter element is connected with the pure water outlet pipeline;
the main filter element backflushing pipeline is connected between a water inlet of the booster pump and a water outlet of the main filter element;
a water inlet of the flushing filter element is connected with a water outlet of the booster pump, and a water outlet of the flushing filter element is connected with a water inlet of the main filter element; a waste water opening of the filter element flushing electromagnetic valve is provided with a filter element flushing waste water electromagnetic valve which is closed when the main filter element produces water;
the first electromagnetic valve is arranged on a pipeline between the water outlet of the booster pump and the water inlet of the main filter element;
the third electromagnetic valve is arranged on the main filter element flushing pipeline;
characterized in that the method comprises:
after water production is stopped, opening the first electromagnetic valve and the third electromagnetic valve;
controlling the booster pump to operate so that raw water enters the main filter element, and enabling pure water filtered by the main filter element to flow to a water inlet of the booster pump through a main filter element backflushing pipeline to be mixed with the raw water;
when set conditions are met, closing the first electromagnetic valve and the third electromagnetic valve, and opening the filter element flushing wastewater electromagnetic valve so that pure water generated by the flushing filter element enters the main filter element to perform pre-membrane flushing;
the set condition is set execution time length, or the TDS value of the waste water port of the main filter element is smaller than a first preset value.
7. The water purification system control method of claim 6, wherein when the pure water generated by the washing cartridge enters the main cartridge to perform pre-membrane washing, the method further comprises:
and detecting the TDS value of the waste water port of the main filter element, and closing the third electromagnetic valve and controlling the heightening pump to stop running until the TDS value is smaller than a second preset value.
8. The water purification system control method of claim 6, further comprising:
the flushing filter element backflushing pipeline is connected between a water inlet of the booster pump and a water outlet of the flushing filter element;
the fourth electromagnetic valve is arranged on the flushing filter element return pipeline;
the method further comprises the following steps:
closing the first solenoid valve and the third solenoid valve;
open the fourth solenoid valve to and control the booster pump operation, so that raw water gets into wash the filter core, the warp wash the filterable pure water warp of filter core wash the filter core backwash pipeline and flow to the water inlet of booster pump mixes with raw water.
9. The water purification system control method of claim 6, further comprising:
obtaining a raw water TDS value;
limiting the first preset value to be less than or equal to a set multiple of the TDS value of the raw water; and limiting the second preset value to be less than or equal to the TDS value of the raw water.
10. The water purification system control method of claim 6,
the water purification system still includes:
the main filter element wastewater return pipeline is connected between the main filter element wastewater pipeline and the water inlet pipeline, and a fifth electromagnetic valve is installed on the main filter element wastewater return pipeline;
when the pure water generated by the flushing filter element enters the main filter element to perform pre-membrane flushing, the method further comprises the following steps:
and opening the fifth electromagnetic valve to enable the wastewater of the main filter element to flow back to the booster pump through the main filter element wastewater return pipeline and be mixed with raw water.
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| CN202010481177.3A CN113731174A (en) | 2020-05-31 | 2020-05-31 | Water purification system control method and water purification system |
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| CN202010481177.3A CN113731174A (en) | 2020-05-31 | 2020-05-31 | Water purification system control method and water purification system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114272670A (en) * | 2021-12-27 | 2022-04-05 | 珠海格力电器股份有限公司 | Water purification equipment and control method thereof |
| CN115970387A (en) * | 2022-12-22 | 2023-04-18 | 珠海格力电器股份有限公司 | Water purification system, control method, electronic equipment and storage medium |
-
2020
- 2020-05-31 CN CN202010481177.3A patent/CN113731174A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114272670A (en) * | 2021-12-27 | 2022-04-05 | 珠海格力电器股份有限公司 | Water purification equipment and control method thereof |
| CN115970387A (en) * | 2022-12-22 | 2023-04-18 | 珠海格力电器股份有限公司 | Water purification system, control method, electronic equipment and storage medium |
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