CN114133073A - Water purification system and water purifier - Google Patents

Water purification system and water purifier Download PDF

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Publication number
CN114133073A
CN114133073A CN202111579906.XA CN202111579906A CN114133073A CN 114133073 A CN114133073 A CN 114133073A CN 202111579906 A CN202111579906 A CN 202111579906A CN 114133073 A CN114133073 A CN 114133073A
Authority
CN
China
Prior art keywords
water
filter element
purification system
water purification
flow meter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111579906.XA
Other languages
Chinese (zh)
Inventor
王世乾
顾意
周平发
吕剑明
李一然
詹婷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202111579906.XA priority Critical patent/CN114133073A/en
Publication of CN114133073A publication Critical patent/CN114133073A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D65/00Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/08Prevention of membrane fouling or of concentration polarisation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D65/00Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/10Testing of membranes or membrane apparatus; Detecting or repairing leaks
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/001Upstream control, i.e. monitoring for predictive control
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/005Processes using a programmable logic controller [PLC]
    • C02F2209/008Processes using a programmable logic controller [PLC] comprising telecommunication features, e.g. modems or antennas
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/42Liquid level
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/22Eliminating or preventing deposits, scale removal, scale prevention
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses a water purification system, which comprises a membrane filter element, wherein a flow meter is arranged on a water inlet pipeline of the membrane filter element and used for detecting water flow, and the flow meter controls the scale inhibition filter element to be opened according to the attenuation condition of the purified water flow so as to pretreat water. The water purification system provided by the invention judges the water quality through the flow meter, and in areas with better water quality, the scale inhibition filter element is not opened during normal water production, so that soft water is reserved in the concentrated water side of the membrane filter element, and the membrane filter element is not easy to scale and block; in areas with poor water quality, the scale inhibition filter element is opened, water passes through the scale inhibition filter element, scaling is not easy to occur under the action of the scale inhibitor, the scaling risk is effectively reduced, and the service life of the membrane filter element of the water purification system is prolonged.

Description

Water purification system and water purifier
Technical Field
The invention belongs to the technical field of water purifier equipment, and particularly relates to a water purifying system and a water purifier.
Background
The water yield of the complete water purifier on the market is generally low, and the water quality change conditions are different in different seasons due to the diversification of water quality in different places. The same design of the water purifier can achieve high recovery rate and long service life in areas with good water quality; however, in areas with poor water quality, the model with high recovery rate is easy to cause the membrane filter element to be polluted and blocked, the purified water flow rate is too fast to attenuate, the filter element needs to be frequently replaced, the service life of the filter element is shortened, and the water efficiency grade is correspondingly reduced when the recovery rate of the water purifier is reduced.
Therefore, it is urgently needed to design a water purification system and a water purifier, and the problem that the service life of the whole machine is influenced because the membrane filter element is plugged and needs to be frequently replaced is solved.
Disclosure of Invention
In order to solve the technical problem that the service life of the whole machine is affected because the membrane filter element is plugged and needs to be frequently replaced in the background art, a water purification system and a water purifier are provided to solve the problem.
In order to achieve the purpose, the specific technical scheme of the water purification system and the water purifier is as follows:
the utility model provides a water purification system, includes the membrane filter core, is provided with the flowmeter on the inlet tube of membrane filter core, and the flowmeter is used for detecting discharge, and the flowmeter controls the filter core that hinders dirty according to the decay condition of discharge and opens to carry out the preliminary treatment to water.
Further, the flowmeter comprises a first flowmeter and a second flowmeter, the first flowmeter is arranged at the upstream of the scale inhibition filter element, the second flowmeter is arranged at the downstream of the membrane filter element, the first flowmeter is used for collecting inflow water flow, and the second flowmeter is used for collecting clean water flow.
Further, the upstream of the scale inhibition filter element is provided with a first electromagnetic valve which is electrically connected with a controller, and the controller enables the scale inhibition filter element to be opened or closed by controlling the first electromagnetic valve.
And the controller controls the second electromagnetic valve to open or close the membrane filter element.
Further, a first electromagnetic valve and the scale inhibition filter core are arranged in series, and the first electromagnetic valve, the scale inhibition filter core and a second electromagnetic valve on the water inlet pipe are arranged in parallel.
Further, a pressure stabilizing pump is further arranged on the water inlet pipe and used for stabilizing the water flow speed.
Further, be provided with the third solenoid valve on the waste pipe of membrane filter core, the third solenoid valve divide into first gear and second gear, and when the third solenoid valve was first gear, for high recovery mode, when the third solenoid valve was the second gear, for low recovery mode.
Further, still include leading filter core, leading filter core sets up in the upper reaches of hindering dirty filter core, and leading filter core is used for carrying out the prefiltration to water.
And the water purifier further comprises a rear filter element which is arranged on the water outlet pipe of the membrane filter element and is used for filtering water again.
A water purifier comprises the water purification system.
The water purification system and the water purifier have the following advantages:
the water quality is judged through the flowmeter, and in areas with better water quality, the scale inhibition filter element is not opened during normal water production, soft water is kept in the concentrated water side of the membrane filter element, so that the membrane filter element is not easy to scale and block; in areas with poor water quality, the scale inhibition filter element is opened, water passes through the scale inhibition filter element, scaling is not easy to occur under the action of the scale inhibitor, the scaling risk is effectively reduced, and the service life of the membrane filter element of the water purification system is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a water purification system of the present invention.
The notation in the figure is:
1. a membrane cartridge; 2. a water inlet pipe; 21. a main branch; 22. a branch circuit; 3. a water outlet pipe; 4. a waste pipe; 5. a first flow meter; 6. a second flow meter; 7. a scale inhibition filter element; 8. a second solenoid valve; 9. a first solenoid valve; 10. a fourth solenoid valve; 11. a front filter element; 12. a post-positioned filter element; 13. a WiFi module; 14. a third electromagnetic valve; 15. a pressure stabilizing pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
The following describes a water purification system and a water purifier according to the present invention with reference to fig. 1.
The water purification system mainly has a water production mode and a flushing mode. Be provided with membrane filter core 1 on water purification system, water inlet, delivery port and waste water mouth are connected to membrane filter core 1, and membrane filter core 1 and water inlet pass through 2 way connections of inlet tube, and membrane filter core 1 and delivery port pass through 3 way connections of outlet pipe, and membrane filter core 1 and waste water mouth pass through 4 way connections of waste water pipe. Be provided with leading filter core 11 on inlet tube 2, be provided with rearmounted filter core 12 on outlet pipe 3, membrane filter core 1 arranges in between leading filter core 11 and rearmounted filter core 12, and water passes through the water inlet and gets into, and earlier behind leading filter core 11, through membrane filter core 1 and rearmounted filter core 12, through delivery port discharge confession user's use, wherein when passing through membrane filter core 1, partly waste water of production passes through waste water pipe 4, from the waste water mouth discharge. In this embodiment, the front filter element 11 is a first-stage water treatment device of the water purification system, and includes but is not limited to a PP cotton filter element, a carbon rod, an ultrafiltration membrane filter element 1 and a ceramic filter element, and is used for filtering large particulate matters in water, removing residual chlorine, etc., and the rear filter element 12 includes but is not limited to a rear carbon rod, an ultrafiltration membrane, etc., and is used for filtering impurities remaining after the water is discharged from the membrane filter element 1, and improving the taste.
When the water purification system carries out the water production mode and the flushing mode under the conditions, the same water purification system has high recovery rate and long service life in areas with good water quality due to different water quality differences of the areas; in the relatively poor area of quality of water, because quality of water is relatively poor, the water purification system makes the membrane shutoff easily, and the life-span of membrane filter core 1 shortens, reduces water purification system's rate of recovery, has also reduced the grade of water effect simultaneously correspondingly for the speed of the water of water purification system output is also different, influences user's experience.
Therefore, in order to satisfy the requirements of high recovery rate and long service life of the water purification system under the water quality conditions of different regions, the water purification system needs to be further designed and modified. Design the flowmeter on water purification system for detect the flow of water, and lead to many wiFi module 13 with the information transmission who collects to the controller in high in the clouds, open or close of the dirt filter core 7 that sets up on water purification system through controller control, further filter water, prevent effectively that membrane filter core 1 from being blockked up, guarantee the high rate of recovery and long life-span of water purification system. In this embodiment, the scale inhibition filter element 7 is used for preventing calcium and magnesium ions in water from forming crystals to cause the pollution blockage of the membrane, and the membrane filter element 1 can filter most of impurities in the water.
As shown in figure 1, the water purification system and the water purifier provided by the invention are characterized in that a flow meter is arranged in the water purification system and used for detecting the flow of water, the value measured by the flow meter is transmitted to a cloud database through a WiFi module 13, whether a scale inhibition filter element 7 arranged in the water purification system is started or not is judged in the database by combining the conditions of local water quality in the past year, the scale inhibition filter element 7 is started in an area with poor water quality, water is changed into soft water which is not easy to crystallize after passing through the scale inhibition filter element 7, excessive dirt accumulation on the surface of a membrane filter element 1 is prevented, and the service life of the whole filter element is prolonged. In areas with good water quality, the scale inhibition filter element 7 is not opened during normal water production, the scale inhibition filter element 7 is only opened in the flushing mode, the scale inhibition filter element 7 is opened in the flushing mode, the water on the concentrated water side of the membrane filter element 1 is ensured to be soft water, the membrane filter element 1 is not easily blocked by dirt, and the service life of the membrane filter element 1 of the water purification system is prolonged.
Specifically, as shown in fig. 1, the flow meter includes a first flow meter 5 and a second flow meter 6, the first flow meter 5 is disposed upstream of the scale inhibition filter element 7, specifically, the first flow meter 5 is disposed between the front filter element 11 and the scale inhibition filter element 7, the second flow meter 6 is disposed downstream of the membrane filter element 1, specifically, the second flow meter 6 is disposed between the membrane filter element 1 and the rear filter element 12, the first flow meter 5 is used for collecting the inflow water flow, and the second flow meter 6 is used for collecting the clean water flow.
Further, as shown in fig. 1, a first electromagnetic valve 9 is arranged upstream of the scale inhibition filter element, the first electromagnetic valve 9 is electrically connected with a controller, and the controller controls the first electromagnetic valve 9 to open or close the scale inhibition filter element 7. The water purification system further comprises a second electromagnetic valve 8, the second electromagnetic valve 8 is arranged at the upstream of the membrane filter element 1, the second electromagnetic valve 8 is electrically connected with a controller, and the controller enables the membrane filter element 1 to be opened or closed by controlling the second electromagnetic valve 8.
Specifically, as shown in fig. 1, a first electromagnetic valve 9 is arranged in series with the scale inhibiting filter element 7, and the first electromagnetic valve 9, the scale inhibiting filter element 7 and a second electromagnetic valve 8 on the water inlet pipe 2 are arranged in parallel. The water inlet pipe 2 way comprises a main branch 21 and a branch 22, the branch 22 is arranged between the preposed filter element 11 and the membrane filter element 1, the scale inhibition filter element 7 is arranged on the branch 22, a first electromagnetic valve 9 is also arranged on the branch 22, the first electromagnetic valve 9 is used for opening or closing the scale inhibition filter element 7, a second electromagnetic valve 8 is arranged on the main branch 21 which is connected with the first electromagnetic valve 9 and the scale inhibition filter element 7 in parallel, the second electromagnetic valve 8 is used for controlling the on-off of water between the preposed filter element 11 and the membrane filter element 1, a pressure stabilizing pump 15 is also arranged on the main branch 21, the pressure stabilizing pump 15 is arranged between the second electromagnetic valve 8 and the membrane filter element 1, the pressure stabilizing pump 15 measures information according to the first flowmeter 5 and the second flowmeter 6, the running power of the pump can be adjusted, and different system requirements can be realized.
Specifically, when the water purification system is in a water production mode, the second electromagnetic valve 8, the third electromagnetic valve 14 and the fourth electromagnetic valve 10 are opened, the first electromagnetic valve 9 is closed, water passes through the front filter element 11, the membrane filter element 1 and the rear filter element 12 to obtain pure water, the pure water is discharged from the water outlet, the first flow meter 5 and the second flow meter 6 start to collect data and transmit the data to the WiFi module 13, the data interacts with the database through the WiFi module 13 to obtain a purified water flow attenuation coefficient, the water purifier flow coefficient under different water quality conditions stored by combining the database, and local water quality historical data are used for judging the local water quality condition, so that whether the scale inhibition filter element 7 is opened or not is judged.
In this embodiment, the third electromagnetic valve 14 is divided into a first gear and a second gear, and the high recovery mode is performed when the third electromagnetic valve 14 is in the first gear, and the low recovery mode is performed when the third electromagnetic valve 14 is in the second gear. When the water quality is better, the attenuation coefficient of the flowmeter is less than or equal to a first set value K and less than or equal to K1, the first electromagnetic valve 9 is closed, the second electromagnetic valve 8 is opened, the third electromagnetic valve 14 is opened to the first gear, and at the moment, the system operates at a high recovery rate; when the water quality is poor, the attenuation coefficient of the flowmeter is set between a first set value and a second set value, K is more than K1 and less than K2, the second electromagnetic valve 8 is closed, the first electromagnetic valve 9 is opened, the third electromagnetic valve 14 is opened at a first gear, and at the moment, the system operates under the condition of high recovery rate; when the water quality is poor, the attenuation coefficient of the flow meter is larger than a second set value K which is not less than K2, the second electromagnetic valve 8 is closed, the first electromagnetic valve 9 is opened, the third electromagnetic valve 14 is opened at a second gear, and at the moment, the system operates at a low recovery rate.
In areas with poor water quality, the scale inhibition filter element 7 of the water purifier is normally open in the process of water production, when the scale inhibition filter element 7 is opened, the second electromagnetic valve 8 is closed, the first electromagnetic valve 9, the third electromagnetic valve 14 and the fourth electromagnetic valve 10 are opened, water sequentially passes through the preposed filter element 11, the scale inhibition filter element 7, the membrane filter element 1 and the postposition filter element 12 to prepare pure water, and the pure water is discharged from a water outlet.
In the ordinary areas and the areas with better water quality, the scale inhibition filter element 7 is normally closed, the second electromagnetic valve 8, the third electromagnetic valve 14 and the fourth electromagnetic valve 10 are opened, the first electromagnetic valve 9 is closed, water passes through the preposed filter element 11, the membrane filter element 1 and the postposition filter element 12 to produce pure water, and the pure water is discharged from the water outlet.
After the water purification system is used for a period of time, the water purification system needs to enter a normal flushing mode, the purpose of entering the flushing mode is to flush out the concentrated water of the membrane filter element 1, the concentrated water of the membrane filter element 1 is replaced by the water which is not easy to scale, therefore, when the flushing mode is carried out, in order to prevent the membrane filter element 1 from being blocked by dirt, the scale inhibiting filter element 7 needs to be opened, the flushing water is filtered, at the moment, the first electromagnetic valve 9, the third electromagnetic valve 14 and the fourth electromagnetic valve 10 are opened, the second electromagnetic valve 8 is closed, the flushing water enters from the water inlet, the flushing water sequentially passes through the preposed filter element 11 and the scale inhibiting filter element 7 and then reaches the concentrated water side of the membrane filter element 1, the concentrated water on the concentrated water side of the membrane filter element 1 is flushed out, the concentrated water of the membrane filter element 1 is replaced by the water which is not easy to scale, and the membrane filter element 1 is prevented from being blocked. When the third electromagnetic valve 14 is in the flushing mode, the third electromagnetic valve 13 is not set to be the first gear or the second gear, but the third electromagnetic valve 13 is completely opened, so that the waste water pipe 4 is changed into a large hole to be communicated, the flushed waste water is discharged from the waste water port through the waste water pipe 4, the waste water port is directly connected to a sewer, and the waste water port can be connected to a barrel to be collected.
Further, as shown in fig. 1, a pressure stabilizing pump 15 is further disposed on the water inlet pipe 2 for stabilizing the water flow speed.
The invention also provides a water purifier, which comprises the water purifying system.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. The utility model provides a water purification system, its characterized in that includes the membrane filter core, is provided with the flowmeter on the inlet tube of membrane filter core, and the flowmeter is used for detecting discharge, and the flowmeter is according to the decay condition of discharge, and control dirt-proof filter core opens to carry out the preliminary treatment to water.
2. The water purification system of claim 1, wherein the flow meter comprises a first flow meter and a second flow meter, the first flow meter is disposed upstream of the scale inhibition filter element, the second flow meter is disposed downstream of the membrane filter element, the first flow meter is configured to collect the flow rate of the inlet water, and the second flow meter is configured to collect the flow rate of the purified water.
3. The water purification system of claim 1, wherein a first electromagnetic valve is arranged upstream of the scale inhibition filter element, the first electromagnetic valve is electrically connected with a controller, and the controller controls the first electromagnetic valve to open or close the scale inhibition filter element.
4. The water purification system of claim 3, further comprising a second solenoid valve disposed upstream of the membrane cartridge, the second solenoid valve being electrically connected to the controller, the controller causing the membrane cartridge to open or close by controlling the second solenoid valve.
5. The water purification system of claim 4, wherein the first solenoid valve is connected in series with the scale inhibiting filter element, and the first solenoid valve and the scale inhibiting filter element are connected in parallel with the second solenoid valve on the water inlet pipe.
6. The water purification system of claim 1, wherein a pressure stabilizing pump is further arranged on the water inlet pipe and used for stabilizing the water flow speed.
7. The water purification system of claim 1, wherein a third solenoid valve is disposed on the waste water pipe of the membrane cartridge, the third solenoid valve is divided into a first position and a second position, and the high recovery mode is performed when the third solenoid valve is in the first position, and the low recovery mode is performed when the third solenoid valve is in the second position.
8. The water purification system of claim 1, further comprising a pre-filter element disposed upstream of the scale inhibiting filter element, the pre-filter element being configured to perform a preliminary filtration of water.
9. The water purification system of claim 1, further comprising a post-filter element disposed on the water outlet pipe of the membrane filter element, the post-filter element being used for re-filtering the water.
10. A water purification machine comprising a water purification system as claimed in any one of claims 1 to 9.
CN202111579906.XA 2021-12-22 2021-12-22 Water purification system and water purifier Pending CN114133073A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111579906.XA CN114133073A (en) 2021-12-22 2021-12-22 Water purification system and water purifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111579906.XA CN114133073A (en) 2021-12-22 2021-12-22 Water purification system and water purifier

Publications (1)

Publication Number Publication Date
CN114133073A true CN114133073A (en) 2022-03-04

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ID=80383064

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111579906.XA Pending CN114133073A (en) 2021-12-22 2021-12-22 Water purification system and water purifier

Country Status (1)

Country Link
CN (1) CN114133073A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115490346A (en) * 2022-08-05 2022-12-20 青岛海尔施特劳斯水设备有限公司 Filter element recommendation method for water purifier and water purifier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115490346A (en) * 2022-08-05 2022-12-20 青岛海尔施特劳斯水设备有限公司 Filter element recommendation method for water purifier and water purifier
CN115490346B (en) * 2022-08-05 2023-08-15 青岛海尔施特劳斯水设备有限公司 Filter element recommendation method for water purifier and water purifier

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