CN206203940U - Water purifier with backflow water-saving system - Google Patents
Water purifier with backflow water-saving system Download PDFInfo
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- CN206203940U CN206203940U CN201621217193.7U CN201621217193U CN206203940U CN 206203940 U CN206203940 U CN 206203940U CN 201621217193 U CN201621217193 U CN 201621217193U CN 206203940 U CN206203940 U CN 206203940U
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Abstract
The utility model is related to water correction plant field, disclose a kind of water purifier with backflow water-saving system, it includes waste water proportioner (500), waste water proportioner (500) is including in waste water ratio main body (1) and insertion waste water ratio main body (1) and can be in the regulation shaft core (2) of waste water ratio main body (1) interior transverse movement, one end of regulation shaft core (2) is current limliting end (22), current limliting end (22) sets the tubular structure of centre bore (221) for middle part, barrel is provided with least two metering holes (222) connected with centre bore (221)；The connecting hole (110) of inner cavity chamber (12) and exocoel (13) is communicated with annular wall (11), current limliting end (22) are inserted into connecting hole (110).This technology, so as to control the concentrated water flow that flows back, can realize the regulation of reflux ratio by the waste water proportioner Intelligent adjustment wastewater flow size, it is ensured that pressure is produced in the range of water security in film before film.It is effectively increased backflow Intelligent adjustment flow, the water saving of maximum efficiency ground.
Description
Technical field
The utility model is related to water correction plant field, more particularly to a kind of water purifier with backflow water-saving system.
Background technology
With the development of water purification technology, a large amount of appearance of family expenses large-flux low-pressure reverse osmosis membrane and water route template water purifier.
User is increasingly strong to the water purifier of big flux and high-quality, and it will turn into water purification industry main flow.
User environment safety is greatly improved with health problem, and the water saving of counter-infiltration purifying drinking appliance is increasingly subject to each water purification
The attention of device manufacturer.Chinese water quality is more complicated, and vast rural market just there is also multiple-quality water with area, in water quality inferiority
Place, flushing water discharge is inadequate, and the damage of reverse osmosis membrane is very big；The good place of water quality, flushing water discharge is excessive, and punching is caused again
The serious waste of wash water；Simultaneously because filter core is changed using waste water ratio, it is impossible to play the purpose of regulation waste water ratio in time.
Utility model content
The problem that the utility model exists for the water saving of counter-infiltration purifying drinking appliance in the prior art, there is provided one kind is with backflow
The water purifier of water-saving system.
In order to solve the above-mentioned technical problem, the utility model is addressed by following technical proposals：
Water purifier with backflow water-saving system, including raw water water inlet pipe and the counter-infiltration membrane filtration that is connected with raw water water inlet pipe
Core, is connected with condensed water outlet pipe on reverse osmosis membrane filter element, condensed water is connected between condensed water outlet pipe and raw water water inlet pipe
Waste water proportioner is equipped with return duct, condensed water return duct and condensed water outlet pipe, waste water proportioner includes waste water ratio main body,
Inner cavity chamber and exocoel are configured with by an annular wall in waste water ratio main body, also including inserting in waste water ratio main body and can be in waste water
Than the regulation shaft core of transverse movement in main body, the one end for adjusting shaft core is current limliting end, and current limliting end is the cylinder that middle part sets centre bore
Shape structure, barrel is provided with least two metering holes connected with centre bore；Inner cavity chamber and exocoel are communicated with annular wall
Connecting hole, current limliting end is inserted into connecting hole.
Preferably, being cased with multiple current limliting sealing rings on current limliting end, current limliting sealing ring is distributed in metering hole both sides.Current limliting is close
Depending on the quantity of seal is according to the quantity of metering hole.
Preferably, the other end of described regulation shaft core is adjustable side, adjustable side is provided with limiting tooth, in waste water ratio main body
Motor is fixed with, the travelling gear engaged with the limiting tooth of adjustable side is connected with the motor shaft of motor.By turning for motor shaft
It is dynamic so that travelling gear drives limiting tooth, so as to realize adjusting the movement of shaft core, then realize metering hole to entering in centre bore
The regulation of water-carrying capacity.
Preferably, also include the microswitch being connected with the controller of motor connection and with controller, in regulation shaft core
The plectrum for stirring microswitch is provided with, controller is operated according to the break-make of microswitch come controlled motor.By controller
And microswitch realizes the Based Intelligent Control to the motion of adjustment axis core so that regulation shaft core can move to accurate location, together
When also realize that the feedback by microswitch is realized to the shutdown of motor or anti-when adjusting shaft core and moving to required position
Turn, so as to realize being accurately positioned waste water specific discharge, it is to avoid disorderly situation.
Preferably, being arranged with the shaft core sealing ring that sealing is formed with waste water ratio main body in regulation shaft core.By in regulation
Shaft core sealing ring is set in shaft core, it is possible to prevente effectively from into the water in the inner cavity chamber of waste water ratio main body by inserting regulation shaft core
Socket outflow.
Preferably, waste water ratio main body upper end is connected with closure, sealing gasket is provided between closure and waste water ratio main body
Circle.
Preferably, being sequentially provided with pressure maintaining valve, preposition filter core, entering water electromagnetic valve and increasing from water inlet on raw water water inlet pipe
Press pump, condensed water return duct is connected between entering water electromagnetic valve and booster pump.When pressure is produced safely higher than mould before reverse osmosis membrane
When outside water condition, when hypertonia before mould, pressure maintains peace before mould is mainly realized by changing its DC voltage
In the range of total pressure, booster pump is because being straightway pump, so becoming hour in DC input voitage, corresponding input current can also diminish,
Related hydraulic pressure after booster pump supercharging can also diminish.
Preferably, raw water water inlet pipe is provided with TDS detectors, temperature sensor and pressure sensor.
Preferably, being also associated with pure water outlet pipe on reverse osmosis membrane filter element, pure water outlet pipe is provided with rearmounted filter core.
Preferably, pure water outlet pipe is connected with standpipe, standpipe is provided with high-voltage switch gear.Equipped with pressure water storage barrel
When, water is perceived completely or under exsiccosis pressure condition, control machine operation or shutdown.
The utility model as a result of above technical scheme, with significant technique effect：
This technology mainly illustrates a kind of water-saving method of intelligent waste water ratio and its application in water purifier.
This technology can be by the waste water proportioner Intelligent adjustment wastewater flow size, so as to control backflow concentrated water flow, reality
The regulation of existing reflux ratio, it is ensured that pressure is produced in the range of water security in film before film.It is effectively increased backflow Intelligent adjustment flow, maximum effect
Can ground water saving.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment 1.
Fig. 2 is the structural representation of waste water proportioner in Fig. 1.
Fig. 3 is the explosive view of Fig. 2.
Fig. 4 is the sectional view of Fig. 2.
Fig. 5 is the structural representation of regulation shaft core in Fig. 2.
The toponym that each number designation is referred in accompanying drawing is as follows：100-raw water water inlet pipe, 200-counter-infiltration membrane filtration
Core, 300-condensed water outlet pipe, 400-condensed water return duct, 500-waste water proportioner, 600-pure water outlet pipe, 700-
Standpipe, 800-rearmounted filter core, 101-pressure maintaining valve, 102-preposition filter core, 103-entering water electromagnetic valve, 104-booster pump,
105-TDS detectors, 106-pressure sensor, 401-check valve, 701-high-voltage switch gear, 1-waste water ratio main body, 2-tune
Nodal axisn core, 3-motor, 4-travelling gear, 5-closure, 6-seal washer, 7-microswitch, 11-annular wall, 12-
Inner cavity chamber, 13-exocoel, 14-water inlet, 15-delivery port, 21-shaft core sealing ring, 22-current limliting end, 23-adjustable side,
24-plectrum, 110-connecting hole, 221-centre bore, 222-metering hole, 223-current limliting sealing ring, 230-limiting tooth.
Specific embodiment
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
Water purifier with backflow water-saving system, as Figure 1-Figure 5, including raw water water inlet pipe 100 and with raw water intake
The reverse osmosis membrane filter element 200 of the connection of pipe 100, is connected with condensed water outlet pipe 300, condensed water water outlet on reverse osmosis membrane filter element 200
Condensed water return duct 400, condensed water return duct 400 and condensed water outlet pipe are connected between pipe 300 and raw water water inlet pipe 100
Waste water proportioner 500 is equipped with 300, pressure maintaining valve 101, preposition filter core are sequentially provided with from water inlet on raw water water inlet pipe 100
102nd, entering water electromagnetic valve 103 and booster pump 104, are additionally provided with and are respectively used to detect raw water TDS values, pressure value and temperature value
TDS detectors 105, pressure sensor 106 and temperature sensor, to be adjusted in real time according to actual raw water quality and hydraulic pressure
Section.Condensed water return duct 400 is connected between entering water electromagnetic valve 103 and booster pump 104, and condensed water return duct 400 is provided with list
To valve 401, the arrival end of check valve 401 is connected with the port of export of waste water proportioner 500.It is also connected with reverse osmosis membrane filter element 200
There is pure water outlet pipe 600, pure water outlet pipe 600 is provided with rearmounted filter core 800 and is connected with standpipe 700, set on standpipe 700
There is high-voltage switch gear 701.
Wherein waste water proportioner 500 includes waste water ratio main body 1, is configured with by an annular wall 11 in waste water ratio main body 1 interior
Chamber 12 and exocoel 13, the upper end of waste water ratio main body 1 are also associated with closure 5, and closure 5 is by being uniformly distributed in closure 5
Being bolted on the upper surface of waste water ratio main body 1 for periphery, is provided with seal washer 6 between closure 5 and waste water ratio main body 1.
In waste water ratio main body 1 it is laterally inserted have regulation shaft core 2, regulation shaft core 2 can the transverse movement in waste water ratio main body 1,
The one end for adjusting shaft core 2 is that can be inserted into the current limliting end 22 in inner cavity chamber 12, and the other end for adjusting shaft core 2 is adjustable side 23, regulation
End 23 is provided with limiting tooth 230.Current limliting end 22 is the tubular structure that middle part sets centre bore 221, and barrel is provided with 5 and centre bore
The metering hole 222 of 221 connections, is communicated with the connecting hole 110 of inner cavity chamber 12 and exocoel 13, the energy of current limliting end 22 in annular wall 11
The outer wall at enough in insertion connecting hole 110 and current limliting ends 22 can form sealing with the inwall of connecting hole 110, so as to avoid current from
Flowed out in gap between current limliting end 22 and connecting hole 110.It is arranged with regulation shaft core 2 and forms sealing with waste water ratio main body 1
Shaft core sealing ring 21, shaft core sealing ring 21 is set between current limliting end 22 and adjustable side 23, will be used to insert in waste water ratio main body 1
The spigot of shaft core sealing ring 21 is sealed, it is to avoid the water entered in the inner cavity chamber 12 of waste water ratio main body 1 passes through the socket stream
Go out.
Waste water ratio main body 1 is provided with the water inlet 14 connected with exocoel 13 and the delivery port 15 connected with inner cavity chamber 12,
Water flows through the exocoel 13 that water inlet 14 flows into waste water ratio main body 1, connects when in the insertion of current limliting end 22 annular wall 11 of regulation shaft core 2
After connecing in hole 110, inflow is interior after the water in exocoel 13 can turn centre bore 221 by the current limliting of metering hole 222 at current limliting end 22
Chamber 12, flows out eventually through delivery port 15.With regulation the stretching into waste water ratio main body 1 of shaft core 2, it is capable of the current limliting of water outlet
Hole is gradually reduced, so that delivery port water outlet reduces, thus makes by the current in the entrance of metering hole 222 inner cavity chamber 12 gradually
Reduce, it is ensured that pressure in respective range, in reverse osmosis membrane and the timing of temperature conditionss one, is limited after water pump supercharging before reverse osmosis membrane
Make its pure wastewater flow ratio and reach certain value, and water quality drinking water up to standard can be obtained.
Water purifier in the present embodiment uses Based Intelligent Control, and whole machine is configured with the pcb board of integrated manipulator, and pcb board is provided with
Charge and discharge battery, wherein entering water electromagnetic valve 103, booster pump 104, pressure sensor 106, temperature sensor, TDS detectors 105 with
And high-voltage switch gear 701 is connected with controller, temperature signal is simultaneously sent to controller by temperature sensor collecting temperature information, control
Device processed according to temperature information temperature or it is too high or too low when send alarm, pressure sensor 106 is used to gather raw water pressure
Force parameter, is pointed out in pressure or too high or too low alarm, and pressure signal is sent to controller by pressure sensor 106 in real time,
Controller controls the pressure regulation of booster pump 104 according to the signal for receiving, and such as when hypertonia before reverse osmosis membrane, is increased by adjusting
The pressure of press pump 104 makes it reach the safe hydraulic pressure of reverse osmosis membrane, so as to reach the purpose of intelligent monitoring.Equipped with pressure on standpipe 700
During power water butt, high-voltage switch gear 701 perceive that water is full or exsiccosis pressure condition under, according to the signal that high-voltage switch gear 701 sends,
Control machine controls whole machine work or shuts down, and causes a machine to normal operation.
Waste water proportioner 500 in the present embodiment mainly realizes its Automated condtrol by motor, specifically by fixation
Motor 3 in waste water ratio main body 1 realizes adjusting the motion of shaft core 2, and the adjustable side 23 for adjusting shaft core 2 sets limited location
Tooth 230, is connected with the travelling gear 4 engaged with the limiting tooth 230 of adjustable side 23 on the motor shaft of motor 3, motor 3 drives transmission
The rotating of gear 4, the driving cog on travelling gear 4 is engaged with the limiting tooth 230 in regulation shaft core 2, realizes similar worm and gear
Transmission, so as to realize adjusting the advance or retrogressing of shaft core 2.Motor 3 in the present embodiment uses small synchronous motor, miniature synchronization
Motor is capable of achieving its rotating to rotate compared with slow type, there is larger torque, is stopped or machine power down machine is indicated every time
When, then motor 3 realizes reversion, allows waste water ratio to be adjusted to minimum, that is, allow waste water ratio to be zeroed, so as to realize its accurate control, without
The situation such as get muddled occurs.
Wherein motor realizes its Based Intelligent Control by controller, and controller is connected with motor 3, and one is connected with controller
Microswitch 7, regulation shaft core 2 is provided with the plectrum 24 for stirring microswitch 7, break-make of the controller according to microswitch 7
Carry out controlled motor 3 to operate, so as to when regulation shaft core 2 moves to certain position, plectrum 24 stirs microswitch 7, microswitch 7
Make-and-break signal is exported to controller, feedback regulation shaft core 2 is moved in place, controller can stop according to the signal control motor 3
Running so that regulation shaft core 2 is aligned accurately, and reaction concentrated water flow is solid.
Current limliting end 22 is provided with the current limliting sealing ring 223 of 5 metering holes 222 and 6 equidistantly distributeds in the present embodiment, limit
Stream sealing ring 223 is distributed in the both sides of metering hole 222, by the setting of current limliting sealing ring 223, may be such that flow control is more smart
Really.5 222 self-limiting ends of metering hole 22 end is divided into hole one, hole two, hole three, Kong Si and hole five, its mesopore one to Kong Si
Aperture be gradually reduced, the aperture of the aperture in hole five more than Kong Si, the equidistantly distributed of Kong Yizhi holes four, between Kong Siyu holes five
Spacing is equal to the twice of spacing between Kong Yiyu holes two, and the center between Kong Siyu holes five is considered as blind spot, blind spot position
For waste water ratio be in close stance, waste water ratio not water outlet, now all sealing rings function both on.End and exocoel when current limliting end 22
When room 13 connects, i.e. exocoel indoor water is directly entered centre bore 221 without metering hole 222, then flows into inner cavity chamber from five holes
12, throttling action is not played now, waste water proportioner 500 is rinse mode, equivalent to waste water full-gear, is capable of achieving reverse osmosis membrane
Used by flushing state, now current limliting sealing ring 223 cuts little ice；When Kong Yiwei metering holes, water in exocoel is from hole
One enters such as centre bore, the water after throttling can flow to inner cavity chamber 12 by centre bore from Kong Erzhi holes five, and centre bore 221 is used as one
Small-sized excessive structural, just plays the structure of noise reduction, and the noise produced by strong injection is reduced so as to play；Similarly, when outer
When the hole different from other of chamber 13 connects, the waste water proportioner 500 is in different gears, so as to realize that regulation shaft core 2 changes
Become the effect of waste water specific discharge.
Specific throttling gear control can be such as following table：
| Gear | Throttle orifice | Apopore | Miniature microswitch |
| One grade | Without throttle orifice | Kong Yi, hole two, hole three, Kong Si, hole five | Disconnected (record 1) |
| Two grades | Kong Yi | Hole two, hole three, Kong Si, hole five | Disconnected (record 2) |
| Third gear | Hole two | Hole three, Kong Si, hole five | Disconnected (record 3) |
| Fourth gear | Hole three | Kong Si, hole five | Disconnected (record 4) |
| Five grades | Kong Si | Hole five | Disconnected (record 5) |
| Six grades | Blind spot | Without apopore | Disconnected (record 6) |
In the present embodiment by taking 600G water purification machines as an example, correlative measurement is with GB/T 30307-2013 GB test conditions, water temperature 25
DEG C, as a example by test data during intake pressure 0.2MPa.
Following status data can be obtained：
For the waste water proportioner a on condensed water outlet pipe 300 and play giving up on the condensed water return duct 400 of backflow
Water proportioner b, in machine system, there is following 5 kinds pure discharge of wastewater states, wherein:The flow value of waste water proportioner a be
Test value under 0.7MPa, the flow value of waste water proportioner b is the test value under 0.4MPa：
| Waste water ratio a gears | Six grades | Five grades | Fourth gear | Third gear | Two grades | One grade |
| Waste water ratio a | 0 | 400 | 500 | 800 | 1000 | Standard-sized sheet (flushing state) |
| Waste water ratio b gears | One grade | Two grades | Third gear | Fourth gear | Five grades | Five grades |
| Waste water ratio b | 2500 | 2000 | 1500 | 1000 | 500 | Nothing |
Test result is as follows：
(1) without concentrated water outflow (1:0), i.e. 0 waste water, without condensed water outflow, infinite reflux is only started shooting or rinses one when closing water
Fix time, there is flushing water to flow out in certain hour, this is without waste water water conservation mode, only a small amount of flushing water outflow, now TDS spies
The raw water TDS values scope for surveying the monitoring of device 105 is 0-21, and this shelves is in order to meet some areas water quality preferably or partly use barreled
The family of office of water, the situation that waste water can be avoided excessive, now waste water proportioner a gears are six grades, and flow is 0, waste water
Proportioner b gears are one grade；
(2) when raw water TDS values scope is 22-100, pure waste water ratio is set to 4：1；Now waste water proportioner a gears are five
Shelves, flow is 400, and waste water proportioner b gears are two grades, and backflow ratio type is 2000；
(3) when raw water TDS values scope is 200-300, pure waste water ratio is set to 3：1；Now waste water proportioner 500a gears
It is fourth gear, flow is 500, waste water proportioner b gears are third gear, reflux ratio offset is 1500；
(4) when raw water TDS values scope is 301-400, pure waste water ratio is set to 2：1；Waste water proportioner 500a gears are four
Grade, flow is:800, waste water proportioner b gear are third gear, and reflux ratio offset is 1000；
(5) when raw water TDS values scope is 400-600, pure waste water ratio is set to 1：1；Waste water proportioner 500a gears are four
Grade, flow is:1000, waste water proportioner b gear are third gear, and reflux ratio offset is:500；
(6) TDS higher then alarms, alarm then presses 1 after eliminating：1 continues water processed, as raw water TDS>1000, then cannot
Use.
Specific reflux ratio can be matched with reference to pressure condition before reverse osmosis membrane correlated performance and film, waste water ratio of then shaping
Device b correlation gear flow values, to obtain optimal water quality, unit is only used as reference, such as following table statistics in explanation：
This technology can increase backflow Intelligent adjustment flow, by above-mentioned technical side by Intelligent adjustment wastewater flow size
Case, the water saving of maximum efficiency ground.Enable that the water purifier is farthest economized on water in the preferable place of water quality, while being capable of basis
Water quality quality is produced water ratio hook by various environment, the pure waste water ratio of Intelligent adjustment with pure water, has overturned the phase of early stage water purifier
Thinking is closed, pure water flow is increased to greatest extent, and get more preferable pure water water quality.
In a word, preferred embodiment of the present utility model is the foregoing is only, it is all according to present utility model application the scope of the claims institute
The impartial change of work and modification, should all belong to the covering scope of the utility model patent.
Claims (10)
1. the water purifier with backflow water-saving system, including reverse osmosis membrane filter element (200), connects on reverse osmosis membrane filter element (200)
There is condensed water outlet pipe (300), it is characterised in that：Waste water proportioner (500), waste water are connected with condensed water outlet pipe (300)
Proportioner (500) includes waste water ratio main body (1), and inner cavity chamber (12) is configured with by an annular wall (11) in waste water ratio main body (1)
With exocoel (13), also including in insertion waste water ratio main body (1) and can be in the regulation shaft core of waste water ratio main body (1) interior transverse movement
(2), one end of regulation shaft core (2) is current limliting end (22), and current limliting end (22) set the tubular structure of centre bore (221) for middle part,
Barrel is provided with least two metering holes (222) connected with centre bore (221)；Annular wall is communicated with inner cavity chamber on (11)
(12) and exocoel (13) connecting hole (110), current limliting end (22) are inserted into connecting hole (110).
2. the water purifier with backflow water-saving system according to claim 1, it is characterised in that：Also include and reverse osmosis membrane
The raw water water inlet pipe (100) of filter core (200) connection, is connected with dense between condensed water outlet pipe (300) and raw water water inlet pipe (100)
Shrink return duct (400), condensed water return duct (400) is provided with waste water proportioner (500).
3. the water purifier with backflow water-saving system according to claim 1 and 2, it is characterised in that：On current limliting end (22)
Multiple current limliting sealing rings (223) are cased with, current limliting sealing ring (223) is distributed in metering hole (222) both sides.
4. the water purifier with backflow water-saving system according to claim 1 and 2, it is characterised in that：Described adjustment axis
The other end of core (2) is adjustable side (23), and adjustable side (23) are provided with limiting tooth (230), and waste water ratio main body is fixed with motor on (1)
(3) travelling gear (4) engaged with the limiting tooth (230) of adjustable side (23), is connected with the motor shaft of motor (3).
5. the water purifier with backflow water-saving system according to any one in claim 4, it is characterised in that：Also include
The controller being connected with motor (3) and the microswitch (7) being connected with controller, regulation shaft core (2) are provided with micro- for stirring
The plectrum (24) of dynamic switch (7), controller is operated according to the break-make of microswitch (7) come controlled motor (3).
6. the water purifier with backflow water-saving system according to any one in claim 1 or 2, it is characterised in that：It is useless
Water is connected with closure (5) than main body (1) upper end, and seal washer (6) is provided between closure (5) and waste water ratio main body (1).
7. the water purifier with backflow water-saving system according to claim 2, it is characterised in that：Raw water water inlet pipe (100)
On be sequentially provided with pressure maintaining valve (101), preposition filter core (102), entering water electromagnetic valve (103) and booster pump (104) from water inlet, it is dense
Shrink return duct (400) is connected between entering water electromagnetic valve (103) and booster pump (104).
8. the water purifier with backflow water-saving system according to claim 2, it is characterised in that：Raw water water inlet pipe (100)
It is provided with TDS detectors (105), pressure sensor (106) and temperature sensor.
9. the water purifier with backflow water-saving system according to claim 1, it is characterised in that：Reverse osmosis membrane filter element
(200) pure water outlet pipe (600) is also associated with, pure water outlet pipe (600) is provided with rearmounted filter core (800).
10. the water purifier with backflow water-saving system according to claim 9, it is characterised in that：Pure water outlet pipe (600)
Standpipe (700) is connected with, standpipe (700) is provided with high-voltage switch gear (701).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621217193.7U CN206203940U (en) | 2016-11-11 | 2016-11-11 | Water purifier with backflow water-saving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621217193.7U CN206203940U (en) | 2016-11-11 | 2016-11-11 | Water purifier with backflow water-saving system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206203940U true CN206203940U (en) | 2017-05-31 |
Family
ID=58753091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621217193.7U Active CN206203940U (en) | 2016-11-11 | 2016-11-11 | Water purifier with backflow water-saving system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206203940U (en) |
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2016
- 2016-11-11 CN CN201621217193.7U patent/CN206203940U/en active Active
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