CN114074968A - Water purification system and control method thereof - Google Patents

Water purification system and control method thereof Download PDF

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Publication number
CN114074968A
CN114074968A CN202010812994.2A CN202010812994A CN114074968A CN 114074968 A CN114074968 A CN 114074968A CN 202010812994 A CN202010812994 A CN 202010812994A CN 114074968 A CN114074968 A CN 114074968A
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China
Prior art keywords
water
way valve
tds value
filter element
pure water
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Granted
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CN202010812994.2A
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Chinese (zh)
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CN114074968B (en
Inventor
崔炳俊
杨磊
武中华
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Qingdao Haier Strauss Water Equipment Co Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Strauss Water Equipment Co Ltd
Haier Smart Home Co Ltd
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Priority to CN202010812994.2A priority Critical patent/CN114074968B/en
Publication of CN114074968A publication Critical patent/CN114074968A/en
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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
    • 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
    • B01D61/10—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
    • 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]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/10—Location of water treatment or water treatment device as part of a potable water dispenser, e.g. for use in homes or offices

Abstract

The invention discloses a water purification system and a control method thereof, wherein the water purification system comprises an RO filter element, a waste water pipeline, a faucet, a three-way valve and a drainage branch; the input end of the three-way valve is connected with the water outlet of the RO filter element through a first pipeline, and the first output end of the three-way valve is connected with a water purifying pipeline; one end of the drainage branch is connected with the second output end of the three-way valve, and the other end of the drainage branch is communicated with the waste water pipeline; during the water making period, the three-way valve is controlled to be switched to the first output end for output; during non-system water, when satisfying first settlement condition, the control three-way valve switches to its second output to realize the filtration side pure water through drainage branch road discharge RO filter core, the safe water of first cup of water for low TDS value when guaranteeing the user water intaking compares prior art, this scheme can not increase the volume of product, simultaneously, because carry out the drainage during non-system water, the pure water of having guaranteed the filtration side of RO filter core remains throughout at low TDS state, need not the user and waits for when the water intaking.

Description

Water purification system and control method thereof
Technical Field
The invention belongs to the technical field of household water purification, and particularly relates to a water purification system and a control method thereof.
Background
The RO (reverse osmosis) filter element filters water based on the principle of reverse osmosis technology; due to the nature of the RO membrane, the water before the membrane and the water after the membrane after standing for a period of time tend to approach each other by ion diffusion TSD (total dissolved solid matter), resulting in a higher TDS of the first cup of pure water.
In the prior art, in order to reduce the TDS value of the first cup of pure water, the following methods are generally adopted: 1. storing raw water or prepared pure water in a storage tank, and cleaning the RO filter element by using the water in the storage tank; 2. cleaning the RO filter element by using the water filtered by the auxiliary filter element; 3. before using purifier system water, let the filter core start a period earlier, discharge the water that TDS value is high earlier.
Among the above various modes, the mode that adopts storage jar and supplementary filter core both increased the cost and also led to the product volume too big, and the mode of the high water of earlier discharge TDS value can increase user's latency.
Disclosure of Invention
The invention aims to provide a water purification system and a control method thereof, which can use pure water with low TDS value without waiting while increasing the product volume by using a low-cost water channel structure and combining a control mode.
The invention is realized by adopting the following technical scheme:
a water purification system is proposed, comprising: the RO filter element comprises a water inlet, a water outlet and a waste water outlet; the water inlet is connected with a water source; the waste water pipeline is connected with a waste water port of the RO filter element; the water faucet is connected with the water outlet of the RO filter element through a water purification pipeline; further comprising: the three-way valve comprises an input end, a first output end and a second output end, and the input end is connected with the water outlet of the RO filter element through a first pipeline; the first output end is connected with the water purifying pipeline; one end of the drainage branch is connected to the second output end of the three-way valve, and the other end of the drainage branch is communicated with the waste water pipeline; during the water making period, the three-way valve is switched to the first output end of the three-way valve to output; and during non-water production, when pure water on the filtering side of the RO filter element is discharged through the drainage branch, the three-way valve is switched to the second output end of the three-way valve to output.
Further, the system further comprises: the TDS detection device is arranged at a water outlet of the RO filter element, an input end of the three-way valve or the first pipeline and is used for detecting a TDS value of pure water at the filtering side of the RO filter element; and controlling the switching or closing of the three-way valve based on the TDS value of the pure water on the filtering side during non-water production.
Further, the system further comprises: the brightness sensor is used for detecting the ambient light brightness of the water purification system; and controlling the switching or closing of the three-way valve based on the ambient light brightness during non-water production.
A control method of a water purification system is provided, the water purification system comprising: the RO filter element comprises a water inlet, a water outlet and a waste water outlet; the water inlet is connected with a water source; the waste water pipeline is connected with a waste water port of the RO filter element; the water faucet is connected with the water outlet of the RO filter element through a water purification pipeline; the input end of the RO filter element is connected with the water outlet of the RO filter element through a first pipeline; the first output end is connected with the water purifying pipeline; one end of the drainage branch is connected to the second output end of the three-way valve, and the other end of the drainage branch is communicated with the waste water pipeline; the method comprises the following steps: during the water making period, the three-way valve is controlled to be switched to the first output end of the three-way valve for output; and during non-water production, when a first set condition is met, controlling the three-way valve to be switched to the second output end of the three-way valve for output so as to discharge the pure water on the filtering side of the RO filter element through the drainage branch.
Further, the first setting condition specifically includes: the first set time is met after water production is finished; or the TDS value of the pure water at the filtering side of the RO filter element exceeds a first preset TDS value.
Further, the first setting condition is one of the following two conditions: the first set time is met after water production is finished; or the TDS value of the pure water at the filtering side of the RO filter element exceeds a first preset TDS value.
Further, the first setting condition specifically includes: the ambient light brightness of water purification system is higher than predetermineeing luminance to, the system water end satisfies the second and sets for time, and/or, the filtration side pure water TDS value of RO filter core exceeds the second and predetermines the TDS value.
Further, the first setting condition further includes: the environmental light brightness of the water purification system is lower than the preset brightness, the third set time is met after the water production is finished, and/or the TDS value of the pure water at the filtering side of the RO filter element exceeds the third preset TDS value.
Further, during the discharging of the pure water of the RO cartridge through the drain branch, the method further comprises: when a second set condition is met, closing the three-way valve; the second setting condition specifically includes: draining water for a fourth set time; or the TDS value of the pure water at the filtering side of the RO filter element is lower than a fourth preset TDS value.
Further, during the discharging of the pure water of the RO cartridge through the drain branch, the method further comprises: when a third set condition is met, closing the three-way valve; the third setting condition is one of the following two conditions: draining water for a fifth set time; or the TDS value of the pure water at the filtering side of the RO filter element is lower than a fifth preset TDS value.
Compared with the prior art, the invention has the advantages and positive effects that: in the water purification system and the control method provided by the invention, a three-way valve is arranged at the water outlet side of the RO filter element, a drainage branch is added between the second output end of the three-way valve and the wastewater pipeline of the RO filter element, and by controlling the output passage of the three-way valve, during the period of non-water production of the water purification system, the pure water with high TDS value is discharged from the waste water pipeline in a mode of periodically and/or detecting the TDS value of the pure water at the filtering side of the RO filter element, so that the first cup of water is safe water with low TDS value when a user takes water, compared with the prior art, the scheme only needs one three-way valve and one water discharge branch, does not need to add an additional storage tank, does not need to carry out complicated water path transformation, does not increase the volume of the product, and simultaneously, because carry out the drainage during non-system water and guarantee that the pure water of RO filter core filtration side remains throughout in low TDS state, need not the user and waits for when the water intaking, improved user's use and experienced.
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 block diagram 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 control method of a water purification system according to the present invention;
FIG. 5 is a flow chart of a control method of a water purification system according to a first embodiment of the present invention;
FIG. 6 is a flow chart of a water purification system control method according to a second embodiment of the present invention;
FIG. 7 is a flow chart of a control method of a water purification system according to a third embodiment of the present invention;
fig. 8 is a flowchart of a control method of a water purification system according to a fourth embodiment of the present invention;
fig. 9 is a flowchart of a control method of a water purification system according to a fifth embodiment of the present invention;
fig. 10 is a flowchart of a control method of a water purification system according to a sixth embodiment of the present invention;
fig. 11 is a flow chart of a control method of a water purification system according to a seventh embodiment of the present invention;
fig. 12 is a flowchart of a water purification system control method according to an eighth embodiment of 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 aims to discharge high-TDS value pure water generated by permeation at the filtering side of an RO filter element in time during non-water production period by controlling through a three-way valve and combining with the improvement of a drainage branch, so as to ensure that a user can take water to obtain high-quality pure water with a low TDS value all the time, and specifically comprises an RO filter element 1, a waste water pipeline 2, a water tap 3, a three-way valve 4 and a drainage branch 5 as shown in figure 1.
The RO filter element 1 comprises a water inlet a, a water outlet b and a waste water port c; the water inlet a is connected with a water source; the waste water pipeline 2 is connected with a waste water port c of the RO filter element 1; the water tap 3 is connected with the water outlet b of the RO filter element 1 through a purified water pipeline 6.
The three-way valve 4 comprises an input end, a first output end and a second output end, and the input end is connected with the water outlet b of the RO filter element 1 through a first pipeline 7; the first output end is connected with a water purifying pipeline 6; one end of the drainage branch 5 is connected with the second output end of the three-way valve 4, and the other end is communicated with the waste water pipeline 2.
Based on the proposed water purification system, the three-way valve 4 can be switched to the first output end to output during water preparation, so that pure water filtered by the RO filter element 1 flows out of the faucet 3; the three-way valve 4 is switched to its second output to output the filtered pure water of the RO cartridge 1 through the water discharge branch 5 during non-produced water, and the control method of the water purification system to discharge the filtered pure water of the RO cartridge 1 through the water discharge branch 5 during non-produced water will be described in detail later.
In some embodiments of the present invention, as shown in fig. 2, the water purification system further includes a pre-filter 8, a post-filter 9, and a booster pump 10, and the water filtered by the pre-filter 8 is input into the RO filter 1 through the booster pump 10. The pure water filtered by the RO filter element 1 flows out from the water tap 3 after being further filtered by the post-filter element 9.
In some embodiments of the present invention, as shown in fig. 3, the water purification system further comprises a TDS detection device 11, which can be installed at the water outlet b of the RO filter cartridge 1, the input end of the three-way valve 4, or the first pipeline 7, and is used for detecting the TDS value of the pure water on the filtration side of the RO filter cartridge; during non-system water, when filtering side pure water TDS value when exceeding standard, the accessible switches three-way valve 4's second output, from the filtration side pure water of drainage branch 5 discharge RO filter core 1, is less than the TDS value of settlement until filtering side pure water TDS value to what use when guaranteeing the user water intaking is the pure water of low TDS value.
In some embodiments of the present invention, the water purification system further comprises a brightness sensor for detecting an ambient light brightness of the water purification system; during periods of non-water production, different drainage control can be implemented according to different environmental light brightness; for example, when the ambient light level is lower than the preset level, the second output end of the three-way valve 4 may be switched according to a longer interval period or an upper limit of the standard TDS value as a condition to discharge the filtered-side pure water of the RO cartridge 1 from the drainage branch 5; when the ambient light brightness is higher than the preset brightness, the second output end of the three-way valve 4 can be switched according to a shorter interval period or the lower limit of the standard TDS value as a condition, and the pure water on the filtering side of the RO filter element 1 is discharged from the drainage branch 5.
Based on the water purification system, the invention provides a control method of the water purification system, which aims to timely discharge the pure water with high TDS value at the filtering side of the RO filter element 1 through the drainage branch 5 during non-water production, and ensure that a user obtains safe pure water with low TDS value all the time when getting water.
Specifically, as shown in fig. 4, the method includes the following steps:
step S41: during the water making period, the control three-way valve is switched to the first output end to output.
The system may determine the occurrence of the water production event by detecting the open state of the faucet 3, or may determine the occurrence of the water production event by determining the pressure of a pressure valve installed in front of the faucet 3, and the present invention is not particularly limited.
And step S42, during non-water production, when a first set condition is met, controlling the three-way valve to be switched to the second output end to output so as to discharge the pure water on the filtering side of the RO filter element through the drainage branch.
Similarly, the system may determine the stop of the water production event by detecting the closed state of the water tap 3, or may determine the stop of the water production event by determining the pressure of a pressure valve installed in front of the water tap 3, and the invention is not particularly limited.
In some embodiments of the present invention, the first setting condition is: the first set time is met after water production is finished; or the TDS value of the pure water on the filtering side of the RO filter element exceeds a first preset TDS value.
In some embodiments of the present invention, the first setting condition is one of the following two conditions: the first set time is met after water production is finished; or the TDS value of the pure water on the filtering side of the RO filter element exceeds a first preset TDS value.
In some embodiments of the present invention, the first setting condition is: the ambient light brightness of water purification system is higher than predetermineeing the luminance to, the system water end satisfies the second and sets for the time, and/or, the filtration side pure water TDS value of RO filter core exceeds the second and predetermines the TDS value.
In some embodiments of the present invention, the first setting condition is: the ambient light brightness of water purification system is less than predetermineeing luminance to, the system water end satisfies the third and sets for the time, and/or, the filtration side pure water TDS value of RO filter core exceeds the third and predetermines the TDS value.
Step S43: and when a second set condition is met, closing the three-way valve.
During non-system water, during the pure water through drainage branch road discharge RO filter core, judge whether water purification system current state satisfies the second and set for the condition, this second sets for the condition and needs the pure water of guaranteeing the high TDS value to be discharged completely, and the pure water of RO filter core filtration side is the safe pure water of low TDS value.
And if the water purification system is full of the second set condition, closing the three-way valve, stopping discharging the pure water, and returning to the step S41 or S42 to ensure that the first cup of water taken by the user is safe pure water with a low TDS value when the user takes water, namely the water is produced by the water purification system.
The second setting condition here includes, but is not limited to, a fourth setting time; and/or the TDS value of the pure water on the filtering side of the RO filter element is lower than a fourth preset TDS value.
In some embodiments of the present invention, the three-way valve is closed to stop discharging pure water when a third set condition is satisfied, the third set condition being one of the following two conditions: a fifth set time; or the TDS value of the pure water at the filtering side of the RO filter element is lower than the fifth preset TDS value
The control method of the water purification system according to the present invention is described in detail in several embodiments.
It should be noted that, in the following embodiments, the step S41, that is, the control during the water making period is the same, and the implementation is implemented according to the prior art, wherein during the water making period, the three-way valve 4 is switched to the first output end, and when the water making period is finished, the three-way valve 4 is closed.
The following examples mainly detail the control method of the water purification system during non-water production.
Example one
In this embodiment, the first setting condition for performing the drainage on the filtering side of the RO filter element during the non-water production period is as follows: and the water production is finished and the first set time is met, the water drainage is finished by adopting a second set condition, and the time length of water drainage through the water drainage branch 5 meets a fourth set time.
Then, as shown in fig. 5, during the non-water production period after the water production is finished, the system detects whether the water production finishing time reaches the first set time, and if so, the three-way valve 4 is switched to the second output end thereof, so that the pure water with high TDS value generated by the permeation on the filtering side of the RO filter element 1 is discharged from the drainage branch 5.
The pure water is discharged from the water discharge branch 5, and when the fourth set time is satisfied, the three-way valve 4 is closed.
Repeat above-mentioned step, promptly, switch the three-way valve again after the first time of setting for and follow drainage branch road drainage, the drainage fourth is set for and is closed three-way valve 4 after the time, until system water next time to during guaranteeing non system water, the TDS value of RO filter core filtration side pure water maintains at safe pure water state all the time, guarantees that the first cup of water of user's water intaking is the safe water of low TDS value.
Example two
In this embodiment, the first setting condition for performing the drainage on the filtering side of the RO filter element during the non-water production period is as follows: the filtration side pure water TDS value of RO filter core exceeds first preset TDS value, and the second settlement condition is adopted in the end drainage, does: the pure water TDS value of the filtration side of the RO filter element is lower than a fourth preset TDS value.
Then, as shown in fig. 6, during the non-water production period after the water production is completed, the TDS detection device detects the TDS value of the filtration-side pure water of the RO filter cartridge 1, and switches the three-way valve 4 to the second output terminal thereof when the TDS value of the filtration-side pure water is higher than the first preset TDS value, so that the pure water with a high TDS value generated by the permeation on the filtration side of the RO filter cartridge 1 is discharged from the drainage branch pipe 5.
During the pure water of 5 discharge of follow drainage branch road, TDS detection device continues to detect the TDS value of RO filter core 1 filtration side pure water, when this filtration side pure water TDS value is less than the fourth preset TDS value, closes three-way valve 4.
Repeat above-mentioned step, also promptly, switch the three-way valve again when filtering side pure water TDS value and being higher than first preset TDS value from drainage branch road drainage, filter side pure water TDS value and be less than and close three-way valve 4 after the fourth preset TDS value, until next time system water to guarantee during non-system water, the TDS value of RO filter core filtration side pure water maintains the safe pure water state all the time, guarantees that the first cup of water of user's water intaking is the safe water of low TDS value.
EXAMPLE III
In this embodiment, the first setting condition for performing the drainage on the filtering side of the RO filter element during the non-water production period is as follows: the water making is finished and meets the first set time, and the water drainage is finished by adopting a second set condition: the pure water TDS value of the filtration side of the RO filter element is lower than a fourth preset TDS value.
As shown in fig. 7, during non-water production after the water production is finished, the system detects whether the water production finishing time reaches the first set time, and if so, the three-way valve 4 is switched to the second output end thereof, so that the pure water with high TDS value generated by permeation on the filtering side of the RO filter element 1 is discharged from the drainage branch 5.
From the timing of 5 discharge pure water periods in drainage branch road, TDS detection device detects RO filter core 1 and filters the TDS value of the pure water of side, when this filters the pure water TDS value of side and is less than the fourth and predetermines the TDS value, closes three-way valve 4.
Repeat above-mentioned step, also promptly, switch the three-way valve again after first settlement time from drainage branch road drainage, filter side pure water TDS value and close three-way valve 4 after being less than the fourth preset TDS value to water next time, during in order to guarantee non-system water, the RO filter core filters the TDS value of side pure water and maintains all the time at safe pure water state, guarantees that the first cup of water of user's water intaking is the safe water of low TDS value.
Example four
In this embodiment, the first setting condition for performing the drainage on the filtering side of the RO filter element during the non-water production period is as follows: the filtration side pure water TDS value of RO filter core exceeds first preset TDS value, and the second settlement condition is adopted in the end drainage, does: the length of time for which water is drained through the drainage branch 5 satisfies the fourth set time.
As shown in fig. 8, during the non-water production period after the water production is completed, the TDS detection device detects the TDS value of the filtration-side pure water of the RO filter cartridge 1, and when the TDS value of the filtration-side pure water is higher than the first preset TDS value, the three-way valve 4 is switched to the second output end thereof, so that the pure water with a high TDS value generated by the permeation on the filtration side of the RO filter cartridge 1 is discharged from the drainage branch pipe 5.
The pure water discharge period from the water discharge branch 5 is timed, and when the fourth set time is satisfied, the three-way valve 4 is closed.
Repeat above-mentioned step, promptly, switch the three-way valve again when filtering side pure water TDS value and being higher than first preset TDS value from drainage branch road drainage, the fourth setting time of drainage is closed three-way valve 4, until system water next time to guarantee during non-system water, the TDS value of RO filter core filtration side pure water remains throughout at safe pure water state, guarantees that the first cup of water of user's water intaking is the safe water of low TDS value.
EXAMPLE five
In this embodiment, the first setting condition for performing the drainage on the filtering side of the RO filter element during the non-water production period is as follows: after water production is finished, first set time is met, or the TDS value of pure water on the filtering side of the RO filter element exceeds a first preset TDS value, and the first set time is met; and finishing the drainage by adopting a third set condition: satisfy the fifth settlement time through the duration of 5 drainage of drainage branch road, or, the filtration side pure water TDS value of RO filter core is less than the fifth preset TDS value to the two satisfies one earlier is the standard.
Then, as shown in fig. 9, during the non-water production period after the water production is finished, the system times the water production finishing time length, and the TDS detection device detects the TDS value of the pure water on the filtration side of the RO filter cartridge 1, and if the time reaches a first set time, the time is satisfied first, and the TDS value of the pure water on the filtration side does not reach a first preset TDS value, the first set time is taken as a first set condition, the three-way valve 4 is switched to the second output end thereof, so that the pure water with a high TDS value generated by the permeation on the filtration side of the RO filter cartridge 1 is discharged from the drainage branch 5; if the timing does not reach the first set time and the TDS value of the pure water at the filtering side exceeds the first preset TDS value, the three-way valve 4 is switched to the second output end of the three-way valve under the first set condition, so that the pure water with the high TDS value generated by the permeation at the filtering side of the RO filter element 1 is discharged from the drainage branch 5.
Timing once more during from drainage branch 5 discharge pure water, TDS detection device continues to detect the TDS value of RO filter core 1 filtration side pure water simultaneously, and when fifth settlement time and filtration side pure water TDS value were less than one of the two conditions of fifth preset TDS value and satisfied, closed three-way valve 4.
Repeat above-mentioned step, that is, when reaching first settlement time and filtering the pure water TDS value of side and being higher than one of these two conditions of first preset TDS value and satisfying, switch over the three-way valve once more from drainage branch road drainage, it is less than when one of these two conditions of fifth preset TDS value and closes three-way valve 4 to filter the pure water TDS value of side at fifth settlement time, until system water next time, in order to guarantee during non-system water, the TDS value of RO filter core filtration side pure water maintains the safe pure water state all the time, guarantee that the first glass of water of user's water intaking is the safe water of low TDS value.
EXAMPLE six
In this embodiment, the first setting condition for performing the drainage on the filtering side of the RO filter element during the non-water production period is as follows: when the ambient light brightness is higher than the preset brightness, the water production is finished and meets a second set time, and when the ambient light brightness is lower than the preset brightness, the water production is finished and meets a third set time; and finishing the drainage by adopting a second set condition: the length of time for which water is drained through the drainage branch 5 satisfies the fourth set time.
Then, as shown in fig. 10, the brightness sensor detects the brightness of the ambient light of the water purification system, and during the non-water production period after the water production is finished, if the brightness of the ambient light is higher than the preset brightness (the preset brightness is usually set as a period when the brightness is higher than the preset brightness, the water is frequently used by the user, and when the brightness is lower than the preset brightness, the water is frequently used by the user), the system detects whether the water production finishing time reaches a second set time, and if so, the three-way valve 4 is switched to the second output end thereof, so that the pure water with a high TDS value generated by permeation on the filtering side of the RO filter element 1 is discharged from the drainage branch 5.
If the ambient light brightness is lower than the preset brightness, the system detects whether the water making finishing time reaches the third set time, if so, the three-way valve 4 is switched to the second output end of the system, so that the pure water with the high TDS value generated by the permeation on the filtering side of the RO filter element 1 is discharged from the drainage branch 5.
In some embodiments of the present invention, the second setting time may be set to be shorter than the third setting time, so as to shorten the drainage period and improve the water quality when the ambient light brightness is higher than the preset brightness, that is, when the user frequently uses water, and appropriately increase the drainage period when the ambient light continuous reading is lower than the preset brightness, that is, when the user does not frequently use water or does not use water, so as to avoid water resource waste.
The time is counted while pure water is discharged from the water discharge branch 5, and the three-way valve 4 is closed when the water discharge satisfies the fourth set time.
The above steps are repeated, namely, the three-way valve is switched again after the second set time or the third set time, the three-way valve 4 is closed after the fourth set time of drainage until water is produced next time, so that the TDS value of the RO filter element filtering side pure water is always maintained in the safe pure water state during the non-water production period, and the first cup of water taken by the user is the safe water with the low TDS value.
In this embodiment, the preset brightness may be set in combination with a time period, and the preset brightness is higher in a time period (daytime or night with illumination) in which the user frequently uses water; the preset brightness is low for periods when the user is using less or no water (typically at night or without lighting).
EXAMPLE seven
In this embodiment, the first setting condition for performing the drainage on the filtering side of the RO filter element during the non-water production period is as follows: when the ambient light brightness is higher than the preset brightness, the TDS value of the pure water at the filtering side of the RO filter element exceeds a second preset TDS value, and when the ambient light brightness is lower than the preset brightness, the TDS value of the pure water at the filtering side of the RO filter element exceeds a third preset TDS value; and finishing the drainage by adopting a second set condition: the pure water TDS value of the filtration side of the RO filter element is lower than a fourth preset TDS value.
Then, as shown in fig. 11, the brightness sensor detects the brightness of the ambient light of the water purification system, and during the non-water production period after the water production is finished, if the brightness of the ambient light is higher than the preset brightness (the preset brightness is usually set as a period when the water is frequently used by the user when the brightness is higher than the preset brightness, and a period when the water is less frequently used by the user when the brightness is lower than the preset brightness), the system detects whether the TDS value of the pure water on the filtration side of the RO filter element exceeds a second preset TDS value, and if so, the three-way valve 4 is switched to the second output end thereof, so that the pure water with a high TDS value generated by permeation on the filtration side of the RO filter element 1 is discharged from the drainage branch 5.
If the ambient light brightness is less than preset luminance, the system detects whether the pure water TDS value of RO filter core filtration side exceeds the third preset TDS value, if, then switches three-way valve 4 to its second output for RO filter core 1's filtration side is because the pure water of the high TDS value that the infiltration generated is discharged from drainage branch 5.
In some embodiments of the present invention, the second preset TDS value may be set to be smaller than the third preset TDS value, so as to improve the quality of water consumption when the ambient light brightness is higher than the preset brightness, that is, when the user frequently uses water, and properly reduce the quality of pure water when the ambient light brightness is lower than the preset brightness, that is, when the user does not frequently use water or does not use water, thereby avoiding water waste; here, the second preset TDS value is, for example, a minimum value of the standard pure water TDS values, and the second preset TDS value is, for example, a maximum value of the standard pure water TDS values.
During the pure water of 5 discharge of follow drainage branch road, TDS detection device continues to detect the TDS value of RO filter core 1 filtration side pure water, when this filtration side pure water TDS value is less than the fourth preset TDS value, closes three-way valve 4.
Repeat above-mentioned step, also promptly, switch over the three-way valve once more when filtering side pure water TDS value and being higher than the preset TDS value of second or the preset TDS value of third from drainage branch road drainage, filter side pure water TDS value and close three-way valve 4 after being less than the preset TDS value of fourth, until system water next time, in order to guarantee during non-system water, the TDS value of RO filter core filtration side pure water maintains at safe pure water state all the time, guarantee that the first glass of water of user's water intaking is the safe water of low TDS value.
The preset brightness can be set in combination with time, and is higher in a time period (day time or night with illumination) when the user frequently uses water; the preset brightness is low for periods when the user is using less or no water (typically at night or without lighting).
Example eight
In this embodiment, the first setting condition for performing the drainage on the filtering side of the RO filter element during the non-water production period is as follows: when the ambient light brightness is higher than the preset brightness, the water production is finished and meets a second preset time, or the TDS value of the pure water at the filtering side of the RO filter element exceeds a second preset TDS value, on the basis of the first meeting of the two values; when the ambient light brightness is lower than the preset brightness, the water production is finished and a third preset time is met or the TDS value of the pure water at the filtering side of the RO filter element exceeds a third preset TDS value, on the basis of the condition that the ambient light brightness and the pure water at the filtering side meet the first preset TDS value; and finishing the drainage by adopting a third set condition: the time of draining satisfies the fifth settlement time or the filtration side pure water TDS value of RO filter core is less than the fifth settlement TDS value to the two satisfies one earlier and is the standard.
Then, as shown in fig. 12, the brightness sensor detects the brightness of the ambient light of the water purification system, and during the non-water production period after the water production is finished, if the brightness of the ambient light is higher than the preset brightness, the system times the water production finishing time, and detects the TDS value of the pure water on the filtration side of the RO filter element, and if the time reaches a second set time, the time is first met, and the TDS value of the pure water on the filtration side does not reach the second preset TDS value, and the second set time is taken as a first set condition, the three-way valve 4 is switched to the second output end thereof, so that the pure water with a high TDS value generated by permeation on the filtration side of the RO filter element 1 is discharged from the drainage branch 5; if the timing does not reach the second setting time and the TDS value of the pure water at the filtering side exceeds the second preset TDS value, the three-way valve 4 is switched to the second output end of the three-way valve under the first setting condition, so that the pure water with the high TDS value generated by the permeation at the filtering side of the RO filter element 1 is discharged from the drainage branch 5.
If the environmental light brightness is lower than the preset brightness, the system times the water-binding duration, detects the pure water TDS value at the filtering side of the RO filter element, and switches the three-way valve 4 to the second output end of the RO filter element by taking the third set time as the first set condition if the time reaches the third set time which is met first and the pure water TDS value at the filtering side does not reach the third preset TDS value, so that the pure water with high TDS value generated by permeation at the filtering side of the RO filter element 1 is discharged from the drainage branch 5; if the timing does not reach the third setting time and the TDS value of the pure water at the filtering side exceeds the third preset TDS value, the third preset TDS value is used as the first setting condition, and the three-way valve 4 is switched to the second output end, so that the pure water with the high TDS value generated by the permeation at the filtering side of the RO filter element 1 is discharged from the drainage branch 5.
In some embodiments of the present invention, the second preset TDS value may be set to be smaller than the third preset TDS value, so as to improve the quality of water consumption when the ambient light brightness is higher than the preset brightness, that is, when the user frequently uses water, and properly reduce the quality of pure water when the ambient light brightness is lower than the preset brightness, that is, when the user does not frequently use water or does not use water, thereby avoiding water waste; here, the second preset TDS value is, for example, a minimum value of the standard pure water TDS values, and the second preset TDS value is, for example, a maximum value of the standard pure water TDS values.
Timing once more during from drainage branch 5 discharge pure water, TDS detection device continues to detect the TDS value of RO filter core 1 filtration side pure water simultaneously, and when fifth settlement time and filtration side pure water TDS value were less than one of the two conditions of fifth preset TDS value and satisfied, closed three-way valve 4.
Repeating the steps, namely switching the three-way valve to drain water from the drainage branch when one of two conditions of reaching the second set time and the TDS value of the filtered side pure water being higher than the second preset TDS value is met, or when one of two conditions of reaching the third set time and the TDS value of the filtered side pure water being higher than the third preset TDS value is met, and closing the three-way valve 4 when one of two conditions of reaching the fifth set time and the TDS value of the filtered side pure water being lower than the fifth preset TDS value is met until next water production; during with guaranteeing non-system water, the TDS value of RO filter core filtration side pure water remains throughout at safe pure water state, guarantees that the first glass of water of user's water intaking is the safety water of low TDS value.
The preset brightness can be set in combination with time, and is higher in a time period (day time or night with illumination) when the user frequently uses water; the preset brightness is low for periods when the user is using less or no water (typically at night or without lighting).
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:
the RO filter element comprises a water inlet, a water outlet and a waste water outlet; the water inlet is connected with a water source;
the waste water pipeline is connected with a waste water port of the RO filter element;
the water faucet is connected with the water outlet of the RO filter element through a water purification pipeline;
it is characterized by also comprising:
the three-way valve comprises an input end, a first output end and a second output end, and the input end is connected with the water outlet of the RO filter element through a first pipeline; the first output end is connected with the water purifying pipeline;
one end of the drainage branch is connected to the second output end of the three-way valve, and the other end of the drainage branch is communicated with the waste water pipeline;
during the water making period, the three-way valve is switched to the first output end of the three-way valve to output; and during non-water production, when pure water on the filtering side of the RO filter element is discharged through the drainage branch, the three-way valve is switched to the second output end of the three-way valve to output.
2. The water purification system of claim 1, further comprising:
the TDS detection device is arranged at a water outlet of the RO filter element, an input end of the three-way valve or the first pipeline and is used for detecting a TDS value of pure water at the filtering side of the RO filter element;
and controlling the switching or closing of the three-way valve based on the TDS value of the pure water on the filtering side during non-water production.
3. The water purification system of claim 1, further comprising:
the brightness sensor is used for detecting the ambient light brightness of the water purification system;
and controlling the switching or closing of the three-way valve based on the ambient light brightness during non-water production.
4. A method of controlling a water purification system, the water purification system comprising:
the RO filter element comprises a water inlet, a water outlet and a waste water outlet; the water inlet is connected with a water source;
the waste water pipeline is connected with a waste water port of the RO filter element;
the water faucet is connected with the water outlet of the RO filter element through a water purification pipeline;
the three-way valve comprises an input end, a first output end and a second output end, and the input end is connected with the water outlet of the RO filter element through a first pipeline; the first output end is connected with the water purifying pipeline;
one end of the drainage branch is connected to the second output end of the three-way valve, and the other end of the drainage branch is communicated with the waste water pipeline;
characterized in that the method comprises:
during the water making period, the three-way valve is controlled to be switched to the first output end of the three-way valve for output;
and during non-water production, when a first set condition is met, controlling the three-way valve to be switched to the second output end of the three-way valve for output so as to discharge the pure water on the filtering side of the RO filter element through the drainage branch.
5. The water purification system control method of claim 4, wherein the first setting condition specifically comprises:
the first set time is met after water production is finished; or the like, or, alternatively,
the pure water TDS value of the filtration side of the RO filter element exceeds a first preset TDS value.
6. The water purification system control method according to claim 4, wherein the first setting condition is one of the following two conditions:
the first set time is met after water production is finished; or the TDS value of the pure water at the filtering side of the RO filter element exceeds a first preset TDS value.
7. The water purification system control method of claim 4, wherein the first setting condition specifically comprises:
the ambient light brightness of water purification system is higher than predetermineeing luminance to, the system water end satisfies the second and sets for time, and/or, the filtration side pure water TDS value of RO filter core exceeds the second and predetermines the TDS value.
8. The water purification system control method of claim 7, wherein the first set condition further comprises:
the environmental light brightness of the water purification system is lower than the preset brightness, the third set time is met after the water production is finished, and/or the TDS value of the pure water at the filtering side of the RO filter element exceeds the third preset TDS value.
9. The water purification system control method of any one of claims 4 to 8, wherein during the discharge of pure water of the RO cartridge through the discharge branch, the method further comprises:
when a second set condition is met, closing the three-way valve;
the second setting condition specifically includes:
draining water for a fourth set time; or the like, or, alternatively,
and the TDS value of the pure water at the filtering side of the RO filter element is lower than a fourth preset TDS value.
10. The water purification system control method of any one of claims 4 to 8, wherein during the discharge of pure water of the RO cartridge through the discharge branch, the method further comprises:
when a third set condition is met, closing the three-way valve;
the third setting condition is one of the following two conditions:
draining water for a fifth set time; or the TDS value of the pure water at the filtering side of the RO filter element is lower than a fifth preset TDS value.
CN202010812994.2A 2020-08-13 2020-08-13 Water purification system and control method thereof Active CN114074968B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060118216A (en) * 2005-05-16 2006-11-23 위니아만도 주식회사 Water purifier and a water-cycling process for water purifier using the same
KR20160017360A (en) * 2014-08-05 2016-02-16 코웨이 주식회사 Apparatus and method for predictive power saving in water purifier
KR20180052403A (en) * 2016-11-10 2018-05-18 코웨이 주식회사 Water treatment apparatus
CN108793457A (en) * 2018-05-25 2018-11-13 珠海格力电器股份有限公司 A kind of water cleaning systems, process for purifying water and device
CN109205813A (en) * 2017-06-30 2019-01-15 佛山市顺德区美的饮水机制造有限公司 The control method of water purifier and water purifier
CN110255736A (en) * 2019-06-26 2019-09-20 浙江艾波特环保科技股份有限公司 A kind of water purifier and method discharging high TDS value pure water
CN209721750U (en) * 2019-01-28 2019-12-03 青岛海尔施特劳斯水设备有限公司 Reverse osmosis water purification machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060118216A (en) * 2005-05-16 2006-11-23 위니아만도 주식회사 Water purifier and a water-cycling process for water purifier using the same
KR20160017360A (en) * 2014-08-05 2016-02-16 코웨이 주식회사 Apparatus and method for predictive power saving in water purifier
KR20180052403A (en) * 2016-11-10 2018-05-18 코웨이 주식회사 Water treatment apparatus
CN109205813A (en) * 2017-06-30 2019-01-15 佛山市顺德区美的饮水机制造有限公司 The control method of water purifier and water purifier
CN108793457A (en) * 2018-05-25 2018-11-13 珠海格力电器股份有限公司 A kind of water cleaning systems, process for purifying water and device
CN209721750U (en) * 2019-01-28 2019-12-03 青岛海尔施特劳斯水设备有限公司 Reverse osmosis water purification machine
CN110255736A (en) * 2019-06-26 2019-09-20 浙江艾波特环保科技股份有限公司 A kind of water purifier and method discharging high TDS value pure water

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