CN105540894A - Reverse osmosis water purification machine system and control method thereof - Google Patents
Reverse osmosis water purification machine system and control method thereof Download PDFInfo
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- CN105540894A CN105540894A CN201610000935.9A CN201610000935A CN105540894A CN 105540894 A CN105540894 A CN 105540894A CN 201610000935 A CN201610000935 A CN 201610000935A CN 105540894 A CN105540894 A CN 105540894A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/04—Non-contaminated water, e.g. for industrial water supply for obtaining ultra-pure water
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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
- C02F2209/02—Temperature
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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
- C02F2209/03—Pressure
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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
- C02F2209/40—Liquid flow rate
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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 relates to a reverse osmosis water purification machine system and a control method thereof. The system comprises a reverse osmosis film filter element, a water inlet channel, a pure water channel, a wastewater channel, a primary filter device, a booster pump and a control circuit. The reverse osmosis film filter element is provided with a water inlet, a pure water opening and a wastewater opening. The water inlet channel is communicated with the water inlet. The primary filter device is arranged on the water inlet channel. The pure water channel and the wastewater channel are communicated with the pure water opening and the wastewater opening respectively. The booster pump is arranged on the water inlet channel or the pure water channel and electrically connected with the control circuit. The primary filter device comprises at least one primary filter element, wherein the water inlet end or water outlet end of the primary filter element is provided with a pressure sensor, and the pressure sensor is arranged on the water inlet channel and electrically connected with the control circuit. The control circuit of the reverse osmosis water purification machine system can carry out analysis according to data detected by the pressure sensor and control the system to work in the optimal mode or send out some warnings, and therefore a user can carry out the next operation.
Description
Technical field
The present invention relates to flow regulation device, particularly a kind of reverse osmosis water purifier system and control method thereof being mainly used in water treating equipment.
Background technology
Along with improving constantly of quality of life, some water treating equipment (as water-purifying machine, instant electric kettle etc.) all need the flow regulating water exactly, but, current water treating equipment generally carry out regulating water flow by the power input controlling water pump, the adjustment of discharge is not accurate enough, and, because in use procedure, the power of water pump converts for a long time, easily cause water pump to damage.
In addition, owing to generally comprising the electrical components such as magnetic valve, under meter, current induction installation in the water route of water treating equipment, these electrical components are connected to separately in water route, owing to adding the interface in water route, improve the risk of leaking.
Further, for water-purifying machine, it comprises the water filtering device being provided with water inlet, pure water mouth and waste water mouth, and generally, after product export, the wastewater effluent amount of waste water mouth finalizes the design almost.If some use occasion water quality is fine, the too large waste that just seems of wastewater effluent amount; If some use occasion water quality is too poor, wastewater effluent amount is too little, and in water filtering device, the pollution discharge capability of filtering membrane is not enough, may cause filtering membrane premature deterioration.Therefore, water flow regulating device is set at waste water mouth imperative, and, be more necessary the water flow regulating device that Electronic control is set at waste water mouth, thus automatically can control it in conjunction with pilot circuit.
Summary of the invention
The object of the invention is to overcome the deficiency that above-mentioned prior art exists, and provide a kind of simple and reasonable for structure, be conducive to extension of function, the reverse osmosis water purifier system of precise control science and control method thereof.
The object of the present invention is achieved like this:
A kind of reverse osmosis water purifier system, comprise reverse osmosis membrane filter element, water entry, pure water passage, waste water tunnel, prefiltration device, topping-up pump and pilot circuit, reverse osmosis membrane filter element is provided with water-in, pure water mouth and waste water mouth, water entry is communicated with water-in, prefiltration device is arranged on water entry, pure water passage and waste water tunnel are communicated with waste water mouth with pure water mouth respectively, topping-up pump is arranged on water entry or pure water passage, and be electrically connected with pilot circuit, prefiltration device comprises at least one prefiltration filter core, it is characterized in that, feed-water end or the water side of at least one prefiltration filter core are provided with pressure transmitter, pressure transmitter is arranged on water entry, and be electrically connected with pilot circuit.The pressure transmitter of this kind of reverse osmosis water purifier system can detect the hydraulic pressure of water entry, also the feed-water end of prefiltration filter core or the real-time hydraulic pressure of water side when the real-time hydraulic pressure before reverse osmosis water purifier system pure water and pure water processed can be detected, the data analysis that pilot circuit can be detected by pressure transmitter Controlling System are with the work pattern of the best or send some and remind, and are convenient to user and carry out next step operation.
Object of the present invention can also adopt following technical measures to solve:
As a scheme more specifically, described prefiltration device comprises a prefiltration filter core, and described prefiltration filter core is the cotton filter core of PP, and pressure transmitter is arranged on feed-water end place or the water side place of the cotton filter core of PP.In view of the cotton filter core of PP is prefiltration filter core the most conventional in water cleaning systems, because its major function filters large particulate matter, so easily block, even if blocking after its feed-water end place or the pressure change of water side place when water processed or non-water processed little, this structure is by means of above-mentioned phenomenon, so pressure transmitter to be arranged on feed-water end place or the water side place of the cotton filter core of PP, in conjunction with pilot circuit, Real-time Water pressure when the real-time hydraulic pressure before described reverse osmosis water purifier system pure water and pure water processed is compared, when during both pressure differences are lower than pilot circuit during a certain default setting value, judge that described prefiltration filter core needs to change, and send corresponding cue.
As further scheme, described prefiltration device also comprises another prefiltration filter core, and another prefiltration filter core described is preposition activated charcoal filter core, and preposition activated charcoal filter core is arranged on the water side place of the cotton filter core of PP.
As further another program, described water entry and pure water passage are also respectively equipped with temperature sensor and under meter, and temperature sensor and under meter are electrically connected with pilot circuit respectively.In pilot circuit, default setting has normal hydraulic pressure value, normal temps value and normal water flow valuve, the real-time traffic that the real time temperature detected when temperature sensor and under meter are detected feeds back to pilot circuit respectively, pilot circuit will compare real-time hydraulic pressure, real time temperature and real-time traffic respectively with the normal hydraulic pressure value of its default setting, normal temps value and normal water flow valuve, when pressure is normal, temperature is normal, if real-time traffic is lower than normal water flow valuve, judge that reverse osmosis membrane filter element needs to change and sends corresponding cue.
As further another scheme, described water entry is provided with inlet end, and inlet end is communicated with motorized valve, and motorized valve and pilot circuit are electrically connected.
Described water entry and pure water passage are also respectively equipped with front water quality probe and rear water quality probe, and front water quality probe and rear water quality probe are electrically connected with pilot circuit respectively.The water quality condition in a certain area is judged by front water quality probe value; after combining, whether the value of water quality probe reaches requirement again; then the aquifer yield of waste water mouth is controlled; do like this and better can protect reverse osmosis membrane filter element; extend its work-ing life, and the good area of water quality can obtain larger aquifer yield.
Described pure water passage is also provided with post active carbon filter core.
A kind of control method of reverse osmosis water purifier system, described reverse osmosis water purifier system comprises reverse osmosis membrane filter element, water entry, pure water passage, waste water tunnel, prefiltration device, topping-up pump and pilot circuit, reverse osmosis membrane filter element is provided with water-in, pure water mouth and waste water mouth, water entry is communicated with water-in, prefiltration device is arranged on water entry, pure water passage and waste water tunnel are communicated with waste water mouth with pure water mouth respectively, topping-up pump is arranged on water entry or pure water passage, feed-water end or the water side of at least one prefiltration filter core are provided with pressure transmitter, pressure transmitter is arranged on water entry, pressure transmitter and topping-up pump are electrically connected with pilot circuit respectively, it is characterized in that: when described reverse osmosis water purifier system pure water, the real-time hydraulic pressure that pressure transmitter is detected feeds back to pilot circuit, pilot circuit judges whether to allow topping-up pump work in conjunction with real-time hydraulic pressure, when during real-time hydraulic pressure is higher than pilot circuit during default setting value P1, pilot circuit controls topping-up pump and quits work, when Real-time Water forces down default setting value in pilot circuit, pilot circuit controls topping-up pump work, in addition, Real-time Water pressure when the real-time hydraulic pressure before described reverse osmosis water purifier system pure water and pure water processed compares by pilot circuit, when during both pressure differences are lower than pilot circuit during another default setting value P2, judge that described prefiltration filter core needs to change and sends corresponding cue.
Described water entry and pure water passage are also respectively equipped with temperature sensor and under meter, and temperature sensor and under meter are electrically connected with pilot circuit respectively; In pilot circuit, default setting has normal hydraulic pressure value P3, normal temps value T and normal water flow valuve I, the real-time traffic that the real time temperature detected when temperature sensor and under meter are detected feeds back to pilot circuit respectively, pilot circuit will compare real-time hydraulic pressure, real time temperature and real-time traffic respectively with normal hydraulic pressure value P3, the normal temps value T of its default setting and normal water flow valuve I, when pressure is normal, temperature is normal, if real-time traffic is lower than normal water flow valuve I, judge that reverse osmosis membrane filter element needs to change and sends corresponding cue.
Described water entry is provided with inlet end, and inlet end is communicated with motorized valve, and motorized valve and pilot circuit are electrically connected; After pilot circuit controls motorized valve cut out, if pilot circuit detects that the signal of pressure transmitter is when changing, judge that motorized valve does not normally cut out and sends corresponding cue.
Beneficial effect of the present invention is as follows:
The pressure transmitter of this kind of reverse osmosis water purifier system is arranged on water entry, and be positioned at feed-water end or the water side of at least one prefiltration filter core, make pressure transmitter the hydraulic pressure of water entry can be detected, also the feed-water end of prefiltration filter core or the real-time hydraulic pressure of water side when the real-time hydraulic pressure before reverse osmosis water purifier system pure water and pure water processed can be detected, utilize these hydraulic pressure data, the function of reverse osmosis water purifier system can be made to be extended in conjunction with pilot circuit, such as: the data analysis that pilot circuit can be detected by pressure transmitter, and Controlling System with the work pattern of the best or send some remind, be convenient to user and carry out next step operation, or pilot circuit, according to the height of hydraulic pressure, judges whether to start topping-up pump, sound reduction, economize on electricity, minimizing high hydraulic pressure complete machine can be damaged like this, point out user when low hydraulic pressure or lack of water, reduce corresponding complaint.
Accompanying drawing explanation
Fig. 1 is one embodiment of the invention structural representation.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
Shown in Figure 1, a kind of reverse osmosis water purifier system, comprise reverse osmosis membrane filter element 8, water entry 13, pure water passage 15, waste water tunnel 14, prefiltration device, topping-up pump 6 and pilot circuit, reverse osmosis membrane filter element 8 is provided with water-in 16, pure water mouth 18 and waste water mouth 17, water entry 13 is communicated with water-in 16, prefiltration device is arranged on water entry 13, pure water passage 15 is communicated with waste water mouth 17 with pure water mouth 18 respectively with waste water tunnel 14, topping-up pump 6 is arranged on water entry 13 or pure water passage 15, and be electrically connected with pilot circuit, prefiltration device comprises at least one prefiltration filter core, and the feed-water end 19 of at least one prefiltration filter core or water side 20 are provided with pressure transmitter 2, pressure transmitter 2 is arranged on water entry 13, and be electrically connected with pilot circuit.
Described prefiltration device comprises a prefiltration filter core, and described prefiltration filter core is the cotton filter core 4 of PP, and pressure transmitter 2 is arranged on feed-water end 19 place of the cotton filter core 4 of PP.Described prefiltration device also comprises another prefiltration filter core, and another prefiltration filter core described is preposition activated charcoal filter core 5, and preposition activated charcoal filter core 5 is arranged on water side 20 place of the cotton filter core 4 of PP.
Described water entry 13 and pure water passage 15 are also respectively equipped with temperature sensor 3 and under meter 12, and temperature sensor 3 and under meter 12 are electrically connected with pilot circuit respectively.
Described water entry 13 is provided with inlet end, and inlet end is communicated with one end of motorized valve 1, and motorized valve 1 and pilot circuit are electrically connected, and the other end of motorized valve 1 is communicated with running water pipe 21.
Described water entry 13 and pure water passage 15 are also respectively equipped with front water quality probe 7 and rear water quality probe 11, and front water quality probe 7 and rear water quality probe 11 are electrically connected with pilot circuit respectively.Described front water quality probe 7 is between prefiltration device and the water-in 16 of reverse osmosis membrane filter element 8.
Described pure water passage 15 is also provided with post active carbon filter core 10.Described post active carbon filter core 10 is between the pure water mouth 18 and rear water quality probe 11 of reverse osmosis membrane filter element 8.Namely the water that after, water quality probe detects is through the water in reverse osmosis water purifier system after all filter element filterings.
Described waste water tunnel 14 is provided with magnetic valve 9, and magnetic valve 9 and pilot circuit are electrically connected.Preferably: the aperture of magnetic valve can regulate.
A kind of control method of reverse osmosis water purifier system, when described reverse osmosis water purifier system pure water, the real-time hydraulic pressure that pressure transmitter 2 is detected feeds back to pilot circuit, pilot circuit judges whether to allow topping-up pump 6 work in conjunction with real-time hydraulic pressure, when during real-time hydraulic pressure is higher than pilot circuit during default setting value P1, pilot circuit controls topping-up pump 6 and quits work, and when Real-time Water forces down default setting value in pilot circuit, pilot circuit controls topping-up pump 6 and works; In addition, Real-time Water pressure when the real-time hydraulic pressure before described reverse osmosis water purifier system pure water and pure water processed compares by pilot circuit, when during both pressure differences are lower than pilot circuit during another default setting value P2, judge that described prefiltration filter core needs to change and sends corresponding cue.
Go back default setting in described pilot circuit and have normal hydraulic pressure value P3, normal temps value T and normal water flow valuve I, the real-time traffic that the real time temperature detected when temperature sensor 3 and under meter 12 are detected feeds back to pilot circuit respectively, pilot circuit will real-time hydraulic pressure, real time temperature and real-time traffic respectively with the normal hydraulic pressure value P3 of its default setting, normal temps value T and normal water flow valuve I compares, when pressure is normal, when temperature is normal, if real-time traffic is lower than normal water flow valuve I, judge that reverse osmosis membrane filter element 88 needs to change, and send corresponding cue.
After pilot circuit controls motorized valve 1 cut out, if pilot circuit detects that the signal of pressure transmitter 2 is when changing, judge that motorized valve 1 does not normally cut out and sends corresponding cue.
The arrow of A shown in Fig. 1 is tap water water inlet direction, and B arrow is waste water discharge direction, and C arrow is pure water discharge direction.
Claims (10)
1. a reverse osmosis water purifier system, comprise reverse osmosis membrane filter element (8), water entry (13), pure water passage (15), waste water tunnel (14), prefiltration device, topping-up pump (6) and pilot circuit, reverse osmosis membrane filter element (8) is provided with water-in (16), pure water mouth (18) and waste water mouth (17), water entry (13) is communicated with water-in (16), prefiltration device is arranged on water entry (13), pure water passage (15) is communicated with waste water mouth (17) with pure water mouth (18) respectively with waste water tunnel (14), topping-up pump (6) is arranged on water entry (13) or pure water passage (15), and be electrically connected with pilot circuit, prefiltration device comprises at least one prefiltration filter core, it is characterized in that, feed-water end (19) or water side (20) of at least one prefiltration filter core are provided with pressure transmitter (2), pressure transmitter (2) is arranged on water entry (13), and be electrically connected with pilot circuit.
2. reverse osmosis water purifier system according to claim 1, it is characterized in that, described prefiltration device comprises a prefiltration filter core, and described prefiltration filter core is the cotton filter core (4) of PP, and pressure transmitter (2) is arranged on feed-water end (19) place or water side (20) place of the cotton filter core (4) of PP.
3. reverse osmosis water purifier system according to claim 2, it is characterized in that, described prefiltration device also comprises another prefiltration filter core, and another prefiltration filter core described is preposition activated charcoal filter core (5), and preposition activated charcoal filter core (5) is arranged on water side (20) place of the cotton filter core (4) of PP.
4. reverse osmosis water purifier system according to claim 1, it is characterized in that, described water entry (13) and pure water passage (15) are also respectively equipped with temperature sensor (3) and under meter (12), and temperature sensor (3) and under meter (12) are electrically connected with pilot circuit respectively.
5. reverse osmosis water purifier system according to claim 1, it is characterized in that, described water entry (13) is provided with inlet end, and inlet end is communicated with motorized valve (1), and motorized valve (1) and pilot circuit are electrically connected.
6. reverse osmosis water purifier system according to claim 1, it is characterized in that, described water entry (13) and pure water passage (15) are also respectively equipped with front water quality probe (7) and rear water quality probe (11), and front water quality probe (7) and rear water quality probe (11) are electrically connected with pilot circuit respectively.
7. reverse osmosis water purifier system according to claim 1 or 6, is characterized in that, described pure water passage (15) is also provided with post active carbon filter core (10).
8. the control method of a reverse osmosis water purifier system, described reverse osmosis water purifier system comprises reverse osmosis membrane filter element (8), water entry (13), pure water passage (15), waste water tunnel (14), prefiltration device, topping-up pump (6) and pilot circuit, reverse osmosis membrane filter element (8) is provided with water-in (16), pure water mouth (18) and waste water mouth (17), water entry (13) is communicated with water-in (16), prefiltration device is arranged on water entry (13), pure water passage (15) is communicated with waste water mouth (17) with pure water mouth (18) respectively with waste water tunnel (14), topping-up pump (6) is arranged on water entry (13) or pure water passage (15), feed-water end (19) or water side (20) of at least one prefiltration filter core are provided with pressure transmitter (2), pressure transmitter (2) is arranged on water entry (13), pressure transmitter (2) and topping-up pump (6) are electrically connected with pilot circuit respectively, it is characterized in that: when described reverse osmosis water purifier system pure water, the real-time hydraulic pressure that pressure transmitter (2) is detected feeds back to pilot circuit, pilot circuit judges whether to allow topping-up pump (6) work in conjunction with real-time hydraulic pressure, when during real-time hydraulic pressure is higher than pilot circuit during default setting value P1, pilot circuit controls topping-up pump (6) and quits work, when Real-time Water forces down default setting value in pilot circuit, pilot circuit controls topping-up pump (6) work,
In addition, Real-time Water pressure when the real-time hydraulic pressure before described reverse osmosis water purifier system pure water and pure water processed compares by pilot circuit, when during both pressure differences are lower than pilot circuit during another default setting value P2, judge that described prefiltration filter core needs to change and sends corresponding cue.
9. the control method of reverse osmosis water purifier system according to claim 8, it is characterized in that: described water entry (13) and pure water passage (15) are also respectively equipped with temperature sensor (3) and under meter (12), and temperature sensor (3) and under meter (12) are electrically connected with pilot circuit respectively, in pilot circuit, default setting has normal hydraulic pressure value P3, normal temps value T and normal water flow valuve I, the real-time traffic that the real time temperature detected when temperature sensor (3) and under meter (12) are detected feeds back to pilot circuit respectively, pilot circuit will real-time hydraulic pressure, real time temperature and real-time traffic respectively with the normal hydraulic pressure value P3 of its default setting, normal temps value T and normal water flow valuve I compares, when pressure is normal, when temperature is normal, if real-time traffic is lower than normal water flow valuve I, judge that reverse osmosis membrane filter element (8) needs to change, and send corresponding cue.
10. the control method of reverse osmosis water purifier system according to claim 8 or claim 9, it is characterized in that: described water entry (13) is provided with inlet end, inlet end is communicated with motorized valve (1), and motorized valve (1) and pilot circuit are electrically connected; After pilot circuit controls motorized valve (1) cut out, if pilot circuit detects that the signal of pressure transmitter (2) is when changing, judge that motorized valve (1) does not normally cut out and sends corresponding cue.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610000935.9A CN105540894A (en) | 2016-01-04 | 2016-01-04 | Reverse osmosis water purification machine system and control method thereof |
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| CN201610000935.9A CN105540894A (en) | 2016-01-04 | 2016-01-04 | Reverse osmosis water purification machine system and control method thereof |
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Cited By (7)
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| CN106322113A (en) * | 2016-08-24 | 2017-01-11 | 浙江沁园水处理科技有限公司 | High-pressure switch and water purifier using high-pressure switch |
| CN106396158A (en) * | 2016-11-23 | 2017-02-15 | 恒力新能源科技(福建)有限公司 | Electric-pump-free RO (reverse osmosis) water purifier system optimizing ratio of purified water to waste water and control method |
| CN106430677A (en) * | 2016-10-10 | 2017-02-22 | 山西桐鑫宇环保设备有限公司 | Cloud-intelligent water purification machine |
| CN107649007A (en) * | 2016-07-26 | 2018-02-02 | 青岛经济技术开发区海尔热水器有限公司 | Water purifier and its determination methods in RO membrane cartridge life-spans |
| CN107673499A (en) * | 2017-10-27 | 2018-02-09 | 杭州德意电器股份有限公司 | A kind of intelligent decision changes the RO water purification machines of filter core |
| CN112520817A (en) * | 2020-12-18 | 2021-03-19 | 珠海格力电器股份有限公司 | Reverse osmosis water purification system control method and device and reverse osmosis water purification system |
| US20210379533A1 (en) * | 2018-10-24 | 2021-12-09 | Woongjin Coway Co., Ltd. | Water purifier |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107649007A (en) * | 2016-07-26 | 2018-02-02 | 青岛经济技术开发区海尔热水器有限公司 | Water purifier and its determination methods in RO membrane cartridge life-spans |
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| CN106396158B (en) * | 2016-11-23 | 2023-06-06 | 恒力新能源科技(福建)有限公司 | Reverse osmosis RO (reverse osmosis) water purifier system with no electric pump for optimizing net wastewater ratio and control method |
| CN107673499A (en) * | 2017-10-27 | 2018-02-09 | 杭州德意电器股份有限公司 | A kind of intelligent decision changes the RO water purification machines of filter core |
| US20210379533A1 (en) * | 2018-10-24 | 2021-12-09 | Woongjin Coway Co., Ltd. | Water purifier |
| CN112520817A (en) * | 2020-12-18 | 2021-03-19 | 珠海格力电器股份有限公司 | Reverse osmosis water purification system control method and device and reverse osmosis water purification system |
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