CN107917263A - The control system and control method of a kind of water-saving tap - Google Patents
The control system and control method of a kind of water-saving tap Download PDFInfo
- Publication number
- CN107917263A CN107917263A CN201711139202.4A CN201711139202A CN107917263A CN 107917263 A CN107917263 A CN 107917263A CN 201711139202 A CN201711139202 A CN 201711139202A CN 107917263 A CN107917263 A CN 107917263A
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- CN
- China
- Prior art keywords
- water
- control unit
- control
- timing
- tap
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0058—Optical means, e.g. light transmission, observation ports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0091—For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Domestic Plumbing Installations (AREA)
Abstract
The control system and control method of a kind of water-saving tap,Including tap shell,Water inlet,Water outlet,Water control valve,Water control valve handle,Action induction unit,Control unit,Throttle flap,Flow sensing unit and at least two solenoid valve,Tap shell is hollow housing,Water inlet is respectively arranged on the both ends of tap shell with water outlet and connects the inner cavity of tap shell,Throttle flap is arranged on the inner wall of the close water outlet of tap shell,The inner cavity of tap shell is divided into first chamber and second chamber by throttle flap,Throttle flap is equipped with least two through hole,Through hole connects first chamber and second chamber,At least two solenoid valve is corresponded arranged at least two through hole respectively,Action induction unit is electrically connected with control unit respectively with flow sensing unit,Control unit controls the switch of solenoid valve.The control system and control method of the water-saving tap can be with effectively save water resources.
Description
Technical field
The present invention relates to sanitaryware field, the control system and control method of more particularly to a kind of water-saving tap.
Background technology
Existing tap has two major classes, and one kind is another kind of manually to turn on cocket handle or valve water outlet, is
Induction tap.The latter, when people stretches out one's hand predeterminable area, induction tap senses natural water outlet after the action of human hand, and works as
After last time senses the signal of human hand, tap can't immediately close off, but not have sensing to believe again in preset time
Number, it can just close.And this period, the water outlet of tap are still that the wave of great lot of water resources is caused with specified water yield water outlet
Take, in addition, when washing one's hands, often most to start water requirement larger by people, then after washing away a period of time, it is only necessary to which a small amount of water is to carry out
The round-off work washed one's hands, and in finally clean, general human hand can't do excessive action, it is possible to by induction tap
It is determined as attonity, and if carrying out water outlet all the time with larger water yield, cleaning effect has no too big lifting, wastes big on the contrary
Big increase, does not meet the demand of national energy-saving emission reduction.
The content of the invention
The technical problems to be solved by the invention are：There is provided it is a kind of can be with the control of the water-saving tap of effectively save water resource
System and control method.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
A kind of control system of water-saving tap, including tap shell, water inlet, water outlet, water control valve, water control valve handle
Hand, action induction unit, control unit, throttle flap, flow sensing unit and at least two solenoid valve, the fire hose head capsule
Body is hollow housing, and the water inlet is respectively arranged on the both ends of tap shell with water outlet and connects the interior of tap shell
Chamber, the throttle flap are arranged on the inner wall of the close water outlet of the tap shell, and the throttle flap is by the fire hose
The inner cavity of casing is divided into first chamber and second chamber, and the throttle flap is equipped with least two through hole, described logical
Hole connects the first chamber and second chamber, at least two solenoid valve correspond respectively arranged at least two it is described logical
At hole, the action induction unit is electrically connected with control unit respectively with flow sensing unit, described control unit control electromagnetism
The switch of valve.
In order to solve the above-mentioned technical problem, another technical solution of the invention is：
A kind of control method of water-saving tap, comprises the following steps：
Step 1：Control unit detects the state of control valve, if water control valve is opened, performs step 2, if water control valve is closed,
Then continue to execute step 1；
Step 2：Control unit detects the opening of three solenoid valves, if three solenoid valves are not fully open, controls
Unit opens three solenoid valves, and performs step 3；If three solenoid valves are fully open, step 3 is directly performed；
Step 3：Flow sensing unit detects the flow of water inlet, if having detected fluid flow, performs step 4, if
Fluid flow is not detected by, continues to execute step 3；
Step 4：Action induction unit senses action signal, if sensing action signal, is sent to control unit and performs letter
Number, perform step 5；If being not sensed by action signal, step 4 is continued to execute；
Step 5：Control unit sets the first timing, and detects whether to continue to receive execution in the first timing
Signal, if receiving execution signal, continues to execute step 5, if not receiving execution signal, control unit closes a solenoid valve, holds
Row step 6；
Step 6：Control unit sets the second timing, detects whether to receive execution signal in the second timing,
If receiving execution signal, step 6 is continued to execute, if not receiving execution signal, control unit turns off a solenoid valve, performs step
Rapid 7；
Step 7：Control unit sets the 3rd timing, detects whether to receive execution signal in the 3rd timing,
If receiving execution signal, step 7 is continued to execute, if not receiving execution signal, performs step 8；
Step 8：Flow sensing unit detects the flow of water inlet, if having detected fluid flow, step 9 is performed, if not
Detect fluid flow, perform step 10；
Step 9：Control unit closes all solenoid valves；
Step 10：Control unit opens all solenoid valves.
The beneficial effects of the present invention are：When opening water control valve by water control valve handle, current flow into the fire hose from water inlet
Casing, flow sensing unit are then turned on action induction unit after being moved to fluid, if human hand reaches action induction unit at this time
Induction region, control unit sets the first timing, the second timing and the 3rd timing respectively, if in above three
The action of human hand is not sensed by timing, then progressively closes off three solenoid valves, three solenoid valves progressively close off so that water
The water yield of tap gradually reduces, and more saves water resource.
Brief description of the drawings
Fig. 1 is the longitudinal cross-section schematic diagram of the control system of the water-saving tap of the embodiment of the present invention；
Label declaration：
1st, tap shell；2nd, water inlet；3rd, water outlet；4th, water control valve handle；5th, water control valve；
6th, action induction unit；7th, throttle flap；8th, solenoid valve；9th, flow sensing unit.
Embodiment
For the technology contents that the present invention will be described in detail, the objects and the effects, below in conjunction with embodiment and coordinate attached
Figure is explained.
The design of most critical of the present invention is：By the way of gradient type is gradually reduced water yield, ensureing cleaning capacity
In the case of save water resource.
It refer to Fig. 1, a kind of control system of water-saving tap, including tap shell 1, water inlet 2, water outlet 3, control water
Valve 5, water control valve handle 4, action induction unit 6, control unit, throttle flap 7, the electricity of flow sensing unit 9 and at least two
Magnet valve 8, the tap shell 1 are hollow housing, and the water inlet 2 and water outlet 3 are respectively arranged on the two of tap shell 1
End and the inner cavity of connection tap shell 1, inner wall of the throttle flap 7 arranged on the close water outlet 3 of the tap shell 1
On, the inner cavity of the tap shell 1 is divided into first chamber and second chamber, the throttle flap 7 by the throttle flap 7
At least two through hole is equipped with, the through hole connects the first chamber and second chamber, at least two solenoid valve 8 are distinguished
Correspond single with control respectively with flow sensing unit 9 arranged at least two through hole, the action induction unit 6
Member is electrically connected, and described control unit controls the switch of solenoid valve 8.
The present invention another technical solution be：
A kind of control method of water-saving tap, comprises the following steps：
Step 1：Control unit detects the state of control valve, if water control valve 5 is opened, step 2 is performed, if water control valve 5 closes
Close, then continue to execute step 1；
Step 2：Control unit detects the opening of three solenoid valves 8, if three solenoid valves 8 are not fully open, controls
Unit processed opens three solenoid valves 8, and performs step 3；If three solenoid valves 8 are fully open, step 3 is directly performed；
Step 3：Flow sensing unit 9 detects the flow at water inlet 2, if having detected fluid flow, performs step 4,
If being not detected by fluid flow, step 3 is continued to execute；
Step 4：Action induction unit senses action signal, if sensing action signal, is sent to control unit and performs letter
Number, perform step 5；If being not sensed by action signal, step 4 is continued to execute；
Step 5：Control unit sets the first timing, and detects whether to continue to receive execution in the first timing
Signal, if receiving execution signal, continues to execute step 5, if not receiving execution signal, control unit closes a solenoid valve 8, holds
Row step 6；
Step 6：Control unit sets the second timing, detects whether to receive execution signal in the second timing,
If receiving execution signal, step 6 is continued to execute, if not receiving execution signal, control unit turns off a solenoid valve 8, performs
Step 7；
Step 7：Control unit sets the 3rd timing, detects whether to receive execution signal in the 3rd timing,
If receiving execution signal, step 7 is continued to execute, if not receiving execution signal, performs step 8；
Step 8：Flow sensing unit 9 detects the flow of water inlet 2, if having detected fluid flow, performs step 9, if
Fluid flow is not detected by, performs step 10；
Step 9：Control unit closes all solenoid valves 8；
Step 10：Control unit opens all solenoid valves 8.
The present invention operation principle be：When someone will open tap washing articles, beaten first by water control valve handle
Water control valve is opened, tap water enters after water control valve the inner cavity for flowing into tap shell again via water inlet；Flow sensing unit senses
There is fluid process to water inlet, breakdown action sensing unit, senses after washing articles or human hand movement, control unit is set
Fixed first timing, if in the first timing, action induction unit senses action signal again, then judges still washing
Wash article, then tap keeps max water yield, if in the first timing, action signal is not arrived in emotion to action induction unit,
Then tap closes a solenoid valve so that a through hole on throttle flap is plugged, and the flow of tap diminishes；Control is single
Member then sets the second timing, if action induction unit senses action signal again in the second timing, sentences
Surely the washing of the second timing duration is passed through, article still needs to clean again, then at this time with the water yield of two through holes of throttle flap
Continue water outlet, and restart timing, if being also not sensed by action signal in the second timing, turn off an electromagnetism
Valve, further reduces water yield；And the 3rd timing is set, if sensing action signal again in the 3rd timing,
Then restart the timing of the 3rd timing, if being also not sensed by action signal in the 3rd timing, first determine whether
Whether water inlet has flowed into without tap water, if water inlet is really flowed into without tap water, judges that user has been switched off tap not
Reuse, the solenoid valve of control unit either on or off；If Inlet water still has tap water inflow, although judging that user no longer makes
With, but do not close tap actively, control unit actively closes a remaining solenoid valve so that throttle flap is complete by current
Full partition, achievees the purpose that to close tap.Whole workflow is gradually decreased the water yield of tap, more supernumerary segment by gradient
Water.
As can be seen from the above description, the beneficial effects of the present invention are：When opening water control valve by water control valve handle, current are certainly
Water inlet flows into tap shell, and flow sensing unit is then turned on action induction unit after being moved to fluid, if human hand reaches at this time
The induction region of action induction unit, when control unit sets the first timing, the second timing and three timings respectively
Between, if being not sensed by the action of human hand in above three timing, progressively close off three solenoid valves, three solenoid valves
Progressively close off so that the water yield of tap gradually reduces, and more saves water resource.
Further, the number of the through hole is 3, and the number of the solenoid valve is 3.
Further, the action induction unit is infrared motion sensing element.
Seen from the above description, infrared motion sensing element is accurately and reliably.Service life is grown.
Further, the step 3 is into step 5, when a length of 5s of first timing, during second timing
Between when a length of 3s, when a length of 1.5s of the 3rd timing.
Seen from the above description, using the time setting method of gradient type, when initially water yield during washing is maximum
Time is most long, then reduces water yield, the setting more science of water yield and time successively.
Fig. 1 is refer to, the embodiment of the present invention one is：
A kind of control system of water-saving tap, including tap shell 1, water inlet 2, water outlet 3, water control valve 5, water control valve
Handle 4, action induction unit 6, control unit, throttle flap 7, the solenoid valve 8 of flow sensing unit 9 and at least two, it is described
Tap shell 1 is hollow housing, and the water inlet 2 is respectively arranged on the both ends of tap shell 1 with water outlet 3 and connects water
The inner cavity of leader shell 1, the throttle flap 7 are arranged on the inner wall of the close water outlet 3 of the tap shell 1, the section
The inner cavity of the tap shell 1 is divided into first chamber and second chamber by stream baffle 7, and the throttle flap 7 is equipped with three
A through hole, the through hole connect the first chamber and second chamber, and the solenoid valve 8 of three is corresponded arranged at least respectively
The through hole of two, the action induction unit 6 are electrically connected with control unit respectively with flow sensing unit 9, the control
The switch of unit control solenoid valve 8 processed.
Another technical solution used in the present invention is：A kind of control method of water-saving tap, comprises the following steps：
Step 1：Control unit detects the state of control valve, if water control valve 5 is opened, step 2 is performed, if water control valve 5 closes
Close, then continue to execute step 1；
Step 2：Control unit detects the opening of three solenoid valves 8, if three solenoid valves 8 are not fully open, controls
Unit processed opens three solenoid valves 8, and performs step 3；If three solenoid valves 8 are fully open, step 3 is performed；
Step 3：Flow sensing unit 9 detects the flow at water inlet 2, if having detected fluid flow, performs step 4,
If being not detected by fluid flow, step 3 is continued to execute；
Step 4：Action induction element senses action signal, if sensing action signal, sends to control unit and performs letter
Number, perform step 5；If not receiving action signal, step 4 is continued to execute；
Step 5：Control unit sets the first timing of 5s, and detects whether to continue to receive in the first timing
Signal is performed, if receiving execution signal, continues to execute step 5, if not receiving execution signal, control unit closes a solenoid valve
8, perform step 6；
Step 6：Control unit sets the second timing of 3s, detects whether to receive in the second timing and performs letter
Number, if receiving execution signal, step 6 is continued to execute, if not receiving execution signal, control unit turns off a solenoid valve 8, holds
Row step 7；
Step 7：Control unit sets the 3rd timing of 1.5s, detects whether to receive execution in the 3rd timing
Signal, if receiving execution signal, continues to execute step 6, if not receiving execution signal, performs step 8；
Step 8：Flow sensing unit 9 detects the flow of water inlet 2, if having detected fluid flow, performs step 9, if
Fluid flow is not detected by, performs step 10；
Step 9：Control unit closes all solenoid valves 8；
Step 10：Control unit opens all solenoid valves 8.
In conclusion the present invention provides it is a kind of can be with the control system of the water-saving tap of effectively save water resource and control
Method.When opening water control valve by water control valve handle, current flow into tap shell, flow sensing unit to fluid from water inlet
Action induction unit is then turned on after dynamic, if human hand reaches the induction region of action induction unit at this time, control unit is set respectively
First timing, the second timing and the 3rd timing, if being not sensed by human hand in above three timing
Action, then progressively close off three solenoid valves, three solenoid valves progressively close off so that the water yield of tap gradually reduces, more
Supernumerary segment about water resource.
The foregoing is merely the embodiment of the present invention, is not intended to limit the scope of the invention, every to utilize this hair
The equivalents that bright specification and accompanying drawing content are made, are directly or indirectly used in relevant technical field, similarly include
In the scope of patent protection of the present invention.
Claims (5)
1. a kind of control system of water-saving tap, including tap shell, water inlet, water outlet, water control valve and water control valve handle,
The tap shell is hollow housing, and the water inlet is respectively arranged on the both ends of tap shell with water outlet and connects water
The inner cavity of leader shell, it is characterised in that further include action induction unit, control unit, throttle flap, flow sensing unit and
At least two solenoid valve, the throttle flap are arranged on the inner wall of the close water outlet of the tap shell, the throttling
The inner cavity of the tap shell is divided into first chamber and second chamber by baffle, and the throttle flap is equipped with least two
Through hole, the through hole connects the first chamber and second chamber, and at least two solenoid valve is corresponded arranged on extremely respectively
The through hole two few, the action induction unit are electrically connected with control unit respectively with flow sensing unit, the control
The switch of unit control solenoid valve processed.
2. the control system of water-saving tap according to claim 1, it is characterised in that the number of the through hole is 3, institute
The number for stating solenoid valve is 3.
3. the control system of water-saving tap according to claim 2, it is characterised in that the action induction unit is infrared
Action induction element.
4. a kind of method of the water-saving tap control system control water-saving tap described in claim 2-3 any one, its feature
It is, comprises the following steps：
Step 1：Control unit detects the state of control valve, if water control valve is opened, performs step 2, if water control valve is closed, after
It is continuous to perform step 1；
Step 2：Control unit detects the opening of three solenoid valves, if three solenoid valves are not fully open, control unit
Three solenoid valves are opened, and perform step 3；If three solenoid valves have been opened, step 3 is directly performed；
Step 3：Flow sensing unit detects the flow of water inlet, if having detected fluid flow, step 4 is performed, if not examining
Fluid flow is measured, continues to execute step 3；
Step 4：Action induction unit senses action signal, if sensing action signal, is sent to control unit and performs signal, held
Row step 5；If being not sensed by action signal, step 4 is continued to execute；
Step 5：Control unit sets the first timing, and in the first timing detects whether to continue to receive to perform letter
Number, if receiving execution signal, step 5 is continued to execute, if not receiving execution signal, control unit closes a solenoid valve, performs
Step 6；
Step 6：Control unit sets the second timing, and detects whether in the second timing to receive execution signal, if
Execution signal is received, continues to execute step 6, if not receiving execution signal, control unit turns off a solenoid valve, performs step
7；
Step 7：Control unit sets the 3rd timing, detects whether to receive execution signal in the 3rd timing, if receiving
To signal is performed, step 7 is continued to execute, if not receiving execution signal, performs step 8；
Step 8：Flow sensing unit detects the flow of water inlet, if having detected fluid flow, step 9 is performed, if not detecting
To fluid flow, step 10 is performed；
Step 9：Control unit closes all solenoid valves；
Step 10：Control unit opens all solenoid valves.
5. the control method of water-saving tap according to claim 4, it is characterised in that the step 3 is into step 5, institute
State when a length of 5s of the first timing, when a length of 3s of second timing, the 3rd timing when it is a length of
1.5s。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711139202.4A CN107917263B (en) | 2017-11-16 | 2017-11-16 | A kind of control system and control method of water-saving tap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711139202.4A CN107917263B (en) | 2017-11-16 | 2017-11-16 | A kind of control system and control method of water-saving tap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107917263A true CN107917263A (en) | 2018-04-17 |
| CN107917263B CN107917263B (en) | 2019-06-11 |
Family
ID=61895640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711139202.4A Active CN107917263B (en) | 2017-11-16 | 2017-11-16 | A kind of control system and control method of water-saving tap |
Country Status (1)
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|---|---|---|---|---|
| CN201155609Y (en) * | 2007-11-21 | 2008-11-26 | 位速科技股份有限公司 | Tap opening-closing structure |
| CN101749457A (en) * | 2008-12-02 | 2010-06-23 | 张庆柳 | Automatic water-saving tap |
| CN103711979A (en) * | 2013-12-10 | 2014-04-09 | 冯伟权 | Manual-automatic operation integrated water tap |
| CN104712822A (en) * | 2013-12-13 | 2015-06-17 | 区超洪 | Faucet capable of adjusting timing modes |
| CN104712820A (en) * | 2013-12-13 | 2015-06-17 | 区超洪 | Faucet capable of adjusting water flow |
| CN204704460U (en) * | 2015-04-28 | 2015-10-14 | 福州志荣感应设备有限公司 | A kind of water yield adjustable water water tap of Manual-automatic integrated |
| KR20170052833A (en) * | 2015-11-05 | 2017-05-15 | 김문회 | Fauset of push type for saving tap water |
-
2017
- 2017-11-16 CN CN201711139202.4A patent/CN107917263B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201155609Y (en) * | 2007-11-21 | 2008-11-26 | 位速科技股份有限公司 | Tap opening-closing structure |
| CN101749457A (en) * | 2008-12-02 | 2010-06-23 | 张庆柳 | Automatic water-saving tap |
| CN103711979A (en) * | 2013-12-10 | 2014-04-09 | 冯伟权 | Manual-automatic operation integrated water tap |
| CN104712822A (en) * | 2013-12-13 | 2015-06-17 | 区超洪 | Faucet capable of adjusting timing modes |
| CN104712820A (en) * | 2013-12-13 | 2015-06-17 | 区超洪 | Faucet capable of adjusting water flow |
| CN204704460U (en) * | 2015-04-28 | 2015-10-14 | 福州志荣感应设备有限公司 | A kind of water yield adjustable water water tap of Manual-automatic integrated |
| KR20170052833A (en) * | 2015-11-05 | 2017-05-15 | 김문회 | Fauset of push type for saving tap water |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107917263B (en) | 2019-06-11 |
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