CN106430763A - Automatic family tap water purification system - Google Patents

Automatic family tap water purification system Download PDF

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Publication number
CN106430763A
CN106430763A CN201610992811.3A CN201610992811A CN106430763A CN 106430763 A CN106430763 A CN 106430763A CN 201610992811 A CN201610992811 A CN 201610992811A CN 106430763 A CN106430763 A CN 106430763A
Authority
CN
China
Prior art keywords
water
automatic cleaning
current
cleaning system
outlet
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
CN201610992811.3A
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Chinese (zh)
Inventor
不公告发明人
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.)
Pujiang Top Technology Development Co Ltd
Original Assignee
Pujiang Top Technology Development Co Ltd
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 Pujiang Top Technology Development Co Ltd filed Critical Pujiang Top Technology Development Co Ltd
Priority to CN201610992811.3A priority Critical patent/CN106430763A/en
Publication of CN106430763A publication Critical patent/CN106430763A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • C02F1/003Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices
    • 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
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/281Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • 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
    • C02F1/30Treatment of water, waste water, or sewage by irradiation
    • C02F1/32Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • 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
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/12Halogens or halogen-containing compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/002Construction details of the apparatus
    • 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
    • C02F2303/04Disinfection

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Sorption (AREA)
  • Physical Water Treatments (AREA)

Abstract

The invention provides an automatic family tap water purification system which is characterized by comprising a box body and a control button, a display screen, a work indication lamp, an observation hole, a water inlet, a water outlet and a sewage drainage hole which are arranged on and formed in the surface of the box body, and further comprising an electronic controller, a rotary water flow agitator, a flat plate type front filter, an activated carbon purifier, a combined type oil substance filter layer, a submersible type light source sterilizer, a hollow fiber membrane purifier, a duplex electromagnetic control valve, a back flush electromagnetic control valve, a back flush system and a back flush pipeline connection assembly which are arranged in the box body; the flat plate type front filter is sequentially communicated with the activated carbon purifier, the combined type oil substance filter layer, the submersible type light source sterilizer, the hollow fiber membrane purifier and the water outlet through pipelines; while tap water is efficiently purified, the tap water is also decontaminated, dechlorinated, degreased, sterilized, disinfected and membrane purified; thus, the compact, circular, sealed, automatic-washing and continuous-operation automatic family tap water purification system is formed.

Description

Domestic running water automatic cleaning system
Technical field
The present invention relates to purifying equipment for running water field, particularly relate to domestic running water automatic cleaning system.
Background technology
Tap water script is a kind of not only having facilitated but also safe drinking water, because water factory is being left in historical reasons municipal tap water When reaching in user family, can be through various water pipes, most municipal administration water pipe is using for many years, and has various difference materials The metal of matter is made.Aging due to municipal aqueduct, water pipe can discharge different amounts of harmful heavy metal in drinking water, than As lead, same, hydrargyrum etc.;The metal of partial corrosion can be entered in water in the form of ion, leads to the content overproof of heavy metal in water.Long Phase drinks the water of heavy metal pollution, and human body can be caused with various harm.Such as lead can largely affect the intelligence of child Development.
Add chlorine still to be used by the water factory more than 80% in the world as a kind of effective sterilizing means.So, A certain amount of chlorine residue must be kept, to guarantee the microbiological indicator safety of drinking water in municipal tap water.The side-product of chlorine is such as Haloform etc..Exceed a certain amount of chlorine, itself also can produce many harm to human body, and carries niff, is commonly called as " drift White lead taste ".After recently scientist also finds and confirms chlorination in the water, chlorine with the organic compound generation haloform in water is Carcinogen.Water is dirtier, and the more, also the more, this kind of compound boils in water after boiling and can not remove the haloform of generation chlorination. In addition, the chlorine in tap water, there are pore such as skin, nostril, oral cavity, pulmonary, hair, eyes, meat vegetables and fruits dish etc. to any Patina, has more direct harm;Because chlorine is easy to quickly be absorbed by above-mentioned object.The tender skin of child children and hair Particularly sensitive to this, scientific investigations showed that:Chlorine not only also can produce impact through skin absorption to human body via the picked-up of food (extracting herein from KEMYSTSLABORATRY Dr.Riddle, Ph.D).
With social development, village tap water increasingly popularizes although its water source relative clean, but its no water factory's processing Sterilization, sterilization, drinking water hygiene also allows of no optimist, pesticide residues, poisonous animal, microorganism corpse, plant decay antibacterial no when No carve and affect the healthy of people.
In sum, from the point of view of current present situation, pay attention to the safe drinking water of tap water, increasingly closed by everybody Note;One kind can go the removal of impurity, eliminate chlorine evil, sterilization, sterilization, can automatically clean, automatic running again;And do not affect tap water Water yield, the purifier for running water that water energy directly drinks of going out after purification will be favored by popular.
Content of the invention
It is an object of the invention to provide a kind of different from existing system, it is right to pass through while high-efficient purification tap water Tap water carry out decontamination, dechlorination, deoil, sterilize, sterilizing, film purifies, and forms compact, circulation closed, cleaning is continuous automatically The domestic running water automatic cleaning system that formula is run.
The technical scheme is that and be achieved in that:Domestic running water automatic cleaning system it is characterised in that:Including box Body and be arranged on the control knob of box surface, display screen, relay indicating light, observation port, water inlet, outlet, mudhole;If Put in the electronic controller of tray interior, rotary current agitator, flat fore filter, activated-charcoal purifier, compound Formula oily matter filter layer, submersible type light source sterilizer, hollow-fibre membrane depurator, duplex solenoid electric valve, backwash electromagnetism Control valve, backwashing system, counter-flushing pipeline coupling assembly;Described water inlet is connected with tap water water inlet pipe, outlet with from Water outlet pipe connects;Described rotary current agitator is connected with water inlet, and is connected with flat fore filter; Described flat fore filter and activated-charcoal purifier, combined type oily matter filter layer, submersible type light source sterilizer, in Hollow fiber film depurator, outlet pipeline are sequentially communicated;Described duplex solenoid electric valve is arranged on water inlet and Rotary Water Between stream agitator and hollow-fibre membrane depurator and outlet;Described backwashing system and water inlet pipe, duplex Electromagnetic Control Valve, the connection of backwash solenoid electric valve;Described electronic controller passes through the time controller being provided at its inner portion, and controls recoil Wash the cleaning operation of system;It is arranged on current induction apparatuss within domestic running water automatic cleaning system, light source induction apparatuss and electricity The inductive switch connection of sub-controller, controls purification process, the opening and closing of light source sterilizer.
Further, described box body is made the setting of its surface of rectangular shape by polyurethane material and is included:Just it is arranged on box body The button in face, display screen, relay indicating light;It is arranged on water inlet, the outlet of box body two sides;And it is arranged on box body lower end Mudhole.
Further, described electronic control system includes:Vlsi circuitry plate, electronic devices and components, current induction apparatuss, light Source induction apparatuss, time controller, inductive switch.
Further, described rotary current agitator includes:Water jet propulsion turbine, rotary nozzle, head brush;Described rotation Rotatable current agitator, drives current agitator, the head brush of current agitator and flat preposition mistake using the mobilization force of current Filter contacts to play the effect of rotary-cleaning.
Further, described flat fore filter includes:Flat filter membrane, cylindrical filter, dirt-collecting Device, emissions mouth.
Further, described activated-charcoal purifier includes:Filter housings, active carbon filter core, combined type oily matter mistake Filtering layer, closure, outlet coupling.
Further, described submersible type light source sterilization includes:Fluorescent tube in ultraviolet, ultraviolet outer lampshade, current stretching machine, Outlet coupling.
Further, described hollow-fibre membrane depurator includes:Doughnut purification membrane, housing, end cover, water inlet Interface, outlet coupling, Butterworth Hatch interface.
Further, described backwashing system includes:Counter-flushing pipeline assembly, backwash tube pipeline connector, duplex electromagnetism control Valve processed, backwash solenoid electric valve, blowdown tube assembly, sewage draining exit joint.
Domestic running water automatic cleaning system of the present invention, compact conformation, automatically control, by tap water decontamination, remove The technological processes such as chlorine, sterilization, sterilization, film purification;Tap water purifying can be direct drinking standard.
Brief description
In order to present invention technical scheme of the prior art and embodiment are clearly described, below will be to prior art Or required accompanying drawing is briefly described it is therefore apparent that drawings in the following description are only the present invention's in embodiment description Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis These accompanying drawings obtain other accompanying drawings.
Accompanying drawing 1 domestic running water automatic cleaning system of the present invention pull down front panel after assembling schematic diagram (front view).
Accompanying drawing 2 domestic running water automatic cleaning system of the present invention pull down upper end end cap after assembling schematic diagram (top view).
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Whole description is although described embodiment is only a part of embodiment of the present invention, rather than whole embodiments, is based on For those of ordinary skill in the art, on the premise of not paying creative work, the every other embodiment being obtained, all Belong to protection scope of the present invention.
Accompanying drawing 1, accompanying drawing 2 show domestic running water automatic cleaning system assembling schematic diagram of the present invention;Now in chain of command Wrench moves power-on switch, display screen show ready dynamically, duplex solenoid valve control valve 18,21 is opened;Meanwhile, enter The outlet closure of cleaning pipe 19, opens tap water faucet, tap water flow direction water inlet 02, by duplex electromagnetism control Valve 18 processed enters rotary current agitator 03, and under the pressure of current, the turbine of driven rotary type current agitator 03 drives Rotary nozzle, head brush rotate, and head brush contacts flat fore filter, and turning clockwise in filter surfaces prevents from blocking, shape The vortex becoming enters the cylindrical filter 01 of lower end, and through filter, impurity is trapped entrance contaminants collector 16, mistake to current Water after filter stream flows out from filter, enters science and engineering at next by flat fore filter in the presence of tap water is from pressure Sequence.
Next step, above by flat fore filter current through preprocessor, eliminate more than 0.01um Impurity, including heavy metal;Subsequently enter activated-charcoal purifier 05, because the housing of activated-charcoal purifier 05 is compared with current water inlet pipe Much bigger, under diameter is compared to use, current slowly rise in the housing of activated-charcoal purifier 05, increased current in activated carbon Time of staying in depurator is it is ensured that the effect of dechlorination;Water body after dechlorination continues to rise, and leads under the effect of the pressure Cross combined type oily matter filter layer 06, eliminate the oily matter in water body and floating thing, then current are net by activated carbon The outlet changing device 05 flows out, and enters next treatment process through outlet pipe 14.
Next step, above-mentioned current after activated carbon dechlorination and oily matter filter layer are filtered are killed by submersible type light source Bacterium device 20 water inlet enters, and current induction apparatuss instruction electronic control system starts ultraviolet sterilization light source;Current stretching machine simultaneously Tubule water-flow equation is become cylindrical thin layer water column 07 slowly to rise, the ultraviolet sterilization light source of internal layer 10 and the purple of outer layer 09 Outside line sterilization light source, is scanned, sterilizes, sterilizes to slow ascending current.Remove microorganism in current, escherichia coli etc. Noxious bacteria.Then current are flowed out by the outlet of submersible type light source sterilizer 20, enter next process through outlet pipe 08 Operation.
Next step, above-mentioned current after submersible type light source sterilizer 20, sterilization, sterilization, pass through water inlet by water pipe 08 Mouth enters hollow-fibre membrane depurator 11, and current enter in the middle of fibrous membrane, in the presence of hydraulic pressure, flows out from membranous wall, due to film The precision of itself, the material more than 0.001um is trapped;Purified water is exported by hollow-fibre membrane depurator 11, duplex electricity Magnetic control valve 21 flows to tap water faucet from cleaning system outlet;So far domestic running water automatic cleaning system of the present invention Purification to tap water current completes, and enters normal operating phase;Electronic control system enters the cleaning preparatory stage.
Next step, the automatic cleaning system of domestic running water automatic cleaning system of the present invention is realized in:Blowdown connects Mouth is with undrinkable water pipeline connection (such as:Water closet, vegetable sink etc.), opened with faucet when above-mentioned, the water in water pipe is opened Begin to flow, current induction apparatuss sensing electronic control system starts duplex solenoid electric valve, opens the passage of water inlet pipe 19, and simultaneously Close the intake tunnel entering cleaning system;So far purging system starts to rinse:Flushing water stream passes through water inlet pipe 19, then wears Cross duplex solenoid electric valve 21 water inlet, enter hollow-fibre membrane depurator 11 outlet, fine to hollow under the effect of the pressure Dimension film carries out backwash it is contemplated that the precision of hollow-fibre membrane depurator, and more fine particle can be gathered in the position of sewage draining exit, In cleaning, therefore employ intermittence rotation cleaning procedure;Enter hollow-fibre membrane depurator 11 in current to initiate, by electronics Electromagnetic valve 13 opens, cuts out electromagnetic valve 22 by control system;Current are through hollow-fibre membrane depurator sewage draining exit 23, electromagnetic valve 13rd, pipeline, sewage draining exit joint 17 flow to undrinkable water tube outlet.After certain time, electromagnetic valve 13 cuts out, electromagnetic valve 22 dozens Open, flushing water stream enters submersible type light source sterilizer 20 by hollow-fibre membrane depurator 11 water inlet, flows to active carbon purifying Device 05 carries out backwash, then flows to flat fore filter 15, eventually passes electromagnetic valve 22, flows to sewage draining exit joint 17 and flows To undrinkable water tube outlet, circulate successively.
Next step, synchronous with aforesaid operations, display screen passes through current induction apparatuss, light source induction apparatuss, the biography of time controller Sense display " decontamination --- prepare --- dechlorination --- deoil --- sterilization --- sterilization --- film purifies " circulation display, represent and purify system System normal operation is dynamic;If a certain process disturbances, display screen stops showing corresponding program, and reports to the police.Display screen during cleaning Display " cleaning " printed words.
The domestic running water automatic cleaning system of the present invention, it is rational in infrastructure, science layout, be automatically brought into operation, automatically clean; Wide accommodation of the present invention, energy-conserving and environment-protective;It is not difficult to find out from examples detailed above, applies flexibly the spirit of the present invention, just can design production The product of all size, the tap water purifying of supporting various pipelines and occasion is processed;And small investment of the present invention, small volume, go out Water is good, purify after water quality can reach the requirement of straight drink.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention Within god and principle, any modification, equivalent substitution and improvement made etc., should be included among protection scope of the present invention.

Claims (9)

1. domestic running water automatic cleaning system it is characterised in that:The control knob that including box body and is arranged on box surface, aobvious Display screen, relay indicating light, observation port, water inlet, outlet, mudhole;It is arranged on the electronic controller of tray interior, rotary Current agitator, flat fore filter, activated-charcoal purifier, combined type oily matter filter layer, the sterilization of submersible type light source Device, hollow-fibre membrane depurator, duplex solenoid electric valve, backwash solenoid electric valve, backwashing system, counter-flushing pipeline connect Assembly;Described water inlet is connected with tap water water inlet pipe, and outlet is connected with running water outlet pipe;Described rotary current agitation Device is connected with water inlet, and is connected with flat fore filter;Described flat fore filter is net with activated carbon Change device, combined type oily matter filter layer, submersible type light source sterilizer, hollow-fibre membrane depurator, outlet pipeline successively Connection;Described duplex solenoid electric valve is arranged on water inlet and rotary current agitator and hollow-fibre membrane depurator and water outlet Between mouthful;Described backwashing system is connected with water inlet pipe, duplex solenoid electric valve, backwash solenoid electric valve;Described electricity Sub-controller passes through the time controller being provided at its inner portion, and controls the cleaning operation of backwashing system;It is arranged on family from the beginning Current induction apparatuss within water automatic cleaning system, light source induction apparatuss are connected with the inductive switch of electronic controller, control and purify Flow process, the opening and closing of light source sterilizer.
2. domestic running water automatic cleaning system according to claim 1 it is characterised in that:Described box body is by polyurethane material Material is made the setting of its surface of rectangular shape and is included:It is arranged on the button in box body front, display screen, relay indicating light;It is arranged on The water inlet of box body two sides, outlet;And it is arranged on the mudhole of box body lower end.
3. domestic running water automatic cleaning system according to claim 1 it is characterised in that:Described electronic control system Including:Vlsi circuitry plate, electronic devices and components, current induction apparatuss, light source induction apparatuss, time controller, inductive switch.
4. domestic running water automatic cleaning system according to claim 1 it is characterised in that:Described rotary current stir Dynamic device includes:Water jet propulsion turbine, rotary nozzle, head brush;Described rotary current agitator, using the mobilization force band of current Dynamic current agitator, the head brush of current agitator is contacted with flat fore filter to play the effect of rotary-cleaning.
5. domestic running water automatic cleaning system according to claim 1 it is characterised in that:Described flat preposition mistake Filter includes:Flat filter membrane, contaminants collector, cylindrical filter, emissions mouth.
6. domestic running water automatic cleaning system according to claim 1 it is characterised in that:Described activated-charcoal purifier Including:Filter housings, active carbon filter core, combined type oily matter filter layer, closure, outlet coupling.
7. domestic running water automatic cleaning system according to claim 1 it is characterised in that:Described submersible type light source kills Bacterium device includes:Fluorescent tube in ultraviolet, ultraviolet outer lampshade, current stretching machine, outlet coupling.
8. domestic running water automatic cleaning system according to claim 1 it is characterised in that:Described hollow-fibre membrane is net Change device to include:Doughnut purifier shell, end cover, water inlet interface, outlet coupling, Butterworth Hatch interface.
9. domestic running water automatic cleaning system according to claim 1 it is characterised in that:Described backwashing system bag Include:Counter-flushing pipeline assembly, backwash tube pipeline connector, duplex solenoid electric valve, backwash solenoid electric valve, blowdown tube assembly, Sewage draining exit joint.
CN201610992811.3A 2016-11-03 2016-11-03 Automatic family tap water purification system Pending CN106430763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610992811.3A CN106430763A (en) 2016-11-03 2016-11-03 Automatic family tap water purification system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610992811.3A CN106430763A (en) 2016-11-03 2016-11-03 Automatic family tap water purification system

Publications (1)

Publication Number Publication Date
CN106430763A true CN106430763A (en) 2017-02-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610992811.3A Pending CN106430763A (en) 2016-11-03 2016-11-03 Automatic family tap water purification system

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107344780A (en) * 2017-03-22 2017-11-14 重庆市潼南区可杰众创农业科技开发有限公司 A kind of livestock and poultry cultivation sewage disposal device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101050039A (en) * 2007-04-03 2007-10-10 王广学 Water filter
CN201505477U (en) * 2009-09-11 2010-06-16 重庆嘉陵制冷空调设备有限公司 Water flow rotary dreg removal and anti-block device
US20130098816A1 (en) * 2011-10-17 2013-04-25 International Water Company Mobile water purification station
CN204454695U (en) * 2014-11-24 2015-07-08 安徽理工大学 A kind of water-saving water purifier
CN105753234A (en) * 2016-05-01 2016-07-13 陈振 Portable multifunctional underground water purifier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101050039A (en) * 2007-04-03 2007-10-10 王广学 Water filter
CN201505477U (en) * 2009-09-11 2010-06-16 重庆嘉陵制冷空调设备有限公司 Water flow rotary dreg removal and anti-block device
US20130098816A1 (en) * 2011-10-17 2013-04-25 International Water Company Mobile water purification station
CN204454695U (en) * 2014-11-24 2015-07-08 安徽理工大学 A kind of water-saving water purifier
CN105753234A (en) * 2016-05-01 2016-07-13 陈振 Portable multifunctional underground water purifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107344780A (en) * 2017-03-22 2017-11-14 重庆市潼南区可杰众创农业科技开发有限公司 A kind of livestock and poultry cultivation sewage disposal device

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Application publication date: 20170222