CN102392474B - Wastewater secondary utilization pressurizing system and control method - Google Patents
Wastewater secondary utilization pressurizing system and control method Download PDFInfo
- Publication number
- CN102392474B CN102392474B CN 201110231466 CN201110231466A CN102392474B CN 102392474 B CN102392474 B CN 102392474B CN 201110231466 CN201110231466 CN 201110231466 CN 201110231466 A CN201110231466 A CN 201110231466A CN 102392474 B CN102392474 B CN 102392474B
- Authority
- CN
- China
- Prior art keywords
- water
- hydraulic cylinder
- lavatory
- piston
- control module
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Sanitary Device For Flush Toilet (AREA)
Abstract
The invention relates to a wastewater secondary utilization pressurizing system and a control method. In the system, a wash basin is connected with a wastewater storage device, a large hydraulic cylinder and a small hydraulic cylinder in series in sequence through a water through pipeline; the bottom part of the small hydraulic cylinder is connected with an external water supply water source through a water supply pipeline; the large hydraulic cylinder is also connected with a toilet water storage tank through the water through pipeline, and the upper end of the large hydraulic cylinder is communicated with the lower end of the small hydraulic cylinder through the water through pipeline; the bottom part of the toilet water storage tank is also connected with the external water supply water source through the water supply pipeline; a large piston is arranged in the large hydraulic cylinder; and a small piston connected with the large piston through a piston rod, a control unit as well as a valve device connected with the control unit and used for controlling the switching-on or the switching-off of the water supply pipeline and the water through pipeline are arranged in the small hydraulic cylinder. The control method comprises the following step of controlling the opening and the closing of each valve by the control unit through judging whether the large hydraulic cylinder and the wastewater storage device are full or not, the water is required to be filled in the toilet water storage tank or not, and the like to achieve the wastewater secondary utilization. The secondary wastewater utilization pressurizing system is simple to manufacture and can automatically conduct the whole process under the control of a control system.
Description
Technical field
The present invention relates to a kind of pressurization system.Particularly relate to a kind of larger pressure that utilizes tap water itself, make waste water supercharging to be transported to the higher position or to be input to Wastewater secondary utilization pressurizing system and the control method of pressurize water tank.
Background technology
Water resource is a kind of natural resource of preciousness, is the necessary condition that all lives and activity in production are carried out.And China is the country that a water resource quite lacks, and water resource occupancy volume per person is quite low, and many urban water supplies are in pressure for a long time.Especially northern metropolis, contradiction is more remarkable.On the other hand, China is again a country that water utilization rate is lower.Solve this contradiction, a most important road is walked the road of water saving exactly, improves the utilization ratio of water resource.Save water, on the one hand, need to improve the public's consciousness of saving water, need on the other hand new technology and equipment, reduce or eliminate the situation of wasting water.
In the most use of our flushing units now of general phenomenon of China is clean tap water.This has caused the great waste of water resource.
In this field, there are many people to explore in this respect, and obtained many achievements.Wherein, the shake patent of invention (proprietary term aims at toilet flushing device utilizing waste water, profit number be CN91211294.8) in east of scape is arranged, proposed a kind of booster pump that utilizes and made waste water supercharging reach the purpose of toilet flushing.His whole system course of work is: first waste water is purified, refilter, the water after filtration enters storage tank.In the time will using, start booster pump, after the waste water pressurization, be transported to certain height and position or water tank that can pressurize, just use the water in water tank when flushing the toilet.Why this device is not promoted, and main cause is: it uses booster pump to carry out supercharging, will use suitable electric energy undoubtedly, and starter motor is all wanted in each bath; Apparatus structure is complicated besides, and cost is relatively high.At present, many places are separately supplied with living water use and drinking water, but are domesticly effectively carried out always.Because change traditional water supply pattern, it is an extremely huge system engineering.Be difficult in a short time realize.At present, effective method realizes in junior unit that exactly water reuse solves the waste problem that tap water is flushed the toilet.
As for school bedroom and hotel etc., the contaminated degree of water is little, relatively cleaning.And will utilize, an important problem is exactly waste water to be produced can supply the pressure of utilization.
Summary of the invention
Technical problem to be solved by this invention is, providing a kind of can flush the toilet the means of waste water reuse of use for the first time, reduces Wastewater secondary utilization pressurizing system and the control method of water resource waste.
the technical solution adopted in the present invention is: a kind of Wastewater secondary utilization pressurizing system and control method, Wastewater secondary utilization pressurizing system, comprise: lavatory water-storing tank and lavatory basin, described lavatory basin is by water-filled pipe and waste water holder, large hydraulic cylinder and small cylinder are connected in series successively, the bottom of described small cylinder connects outside resource of water supply by supply channel, described large hydraulic cylinder also is connected with the lavatory water-storing tank by water-filled pipe, large hydraulic cylinder upper end be arranged on the small cylinder lower end and be connected by water-filled pipe, water-storing tank bottom, described lavatory also connects outside resource of water supply by supply channel, wherein, be provided with large piston in described large hydraulic cylinder, be provided with valve piston in described small cylinder, described large piston is connected by a piston rod with valve piston, the valving that also is provided with control module and the control supply channel that is connected with control module and water-filled pipe conducting or closes.
Be provided with screen pack on the delivery port of described lavatory basin, the bottom of lavatory basin be provided with the solid-holding device.
described valving includes and is connected with control module respectively: be arranged on the unidirectional normally closed solenoid valve on the supply channel of small cylinder bottom, be arranged on the normally open solenoid valve on large hydraulic cylinder and water-filled pipe that small cylinder is communicated with, be arranged on the normal opening one-way valve on waste water holder and water-filled pipe that large hydraulic cylinder is communicated with, be arranged on the overflow valve on large hydraulic cylinder and water-filled pipe that the lavatory water-storing tank is communicated with, be arranged on the unidirectional normally closed solenoid valve on the supply channel of lavatory water-storing tank bottom, and be arranged on the first level sensor on the water-storing tank of lavatory and be arranged on the second level sensor on large hydraulic cylinder.
Described valving also includes the fine motion switch contacts that is arranged on the small cylinder upper end.
The upper end of described waste water holder also is provided with overfall.
Relation between the diameter D1 of described large piston and the diameter D2 of valve piston satisfies following condition:
F2=π×P2×D2
2/4>F1=π×P1×D1
2/4
Wherein: P2 is the pressure of small cylinder input tap water, and P1 is the setting pressure of overflow valve, and F2 is the power of valve piston, and F1 is the power of large piston.
Be used for the control method of Wastewater secondary utilization pressurizing system, comprise the steps:
Whether 1) control module judges needs supplementing water in the water-storing tank of lavatory, be to enter next step, otherwise return to wait state;
2) control module judges whether large hydraulic cylinder is full, is to enter next step, otherwise enters the 6th step;
3) control module control normally open solenoid valve cuts out, and controls unidirectional normally closed solenoid valve and opens;
4) control module judges whether the waste water holder is full, is to enter next step, otherwise continues to judge whether the waste water holder is full;
5) control module control normally open solenoid valve is opened, and controls unidirectional normally closed solenoid valve and closes, and then returns to wait state;
6) the unidirectional normally closed solenoid valve of control module control is opened, and replenishes tap water to the lavatory water-storing tank;
7) control module judges whether lavatory water-storing tank moisturizing is full, is to close unidirectional normally closed solenoid valve, then returns to wait state, otherwise continues to replenish tap water to the lavatory water-storing tank.
Wastewater secondary utilization pressurizing system of the present invention has following features:
1) its pressurization is simple, does not need other the energy, has solved the problem of waste water supercharging;
2) whole process can be carried out under the control of control system automatically;
3) have very strong compliance, make simply, do not make troubles to our life when utilizing waste water.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is control method flow chart of the present invention.
Wherein:
A: unidirectional normally closed solenoid valve B: normally open solenoid valve
C: normal opening one-way valve D: overflow valve
E: unidirectional normally closed solenoid valve 1: lavatory basin
2: screen pack 3: the solid-holding device
4: 5: the second sensors of waste water holder
6: large hydraulic cylinder 7: large piston
8: piston rod 9: the fine motion switch contacts
10: valve piston 11: small cylinder
12: first sensor 13: the lavatory water-storing tank
14: outside resource of water supply 15: control module
16: overfall
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, Wastewater secondary utilization pressurizing system of the present invention and control method are made a detailed description.
Wastewater secondary utilization pressurizing system of the present invention and control method are utilized the larger pressure of tap water itself, make waste water supercharging to be transported to the higher position or to be input to the pressurize water tank, the purpose of utilizing waste water to flush the toilet to reach secondary.
as shown in Figure 1, Wastewater secondary utilization pressurizing system of the present invention, comprise: lavatory water-storing tank 13 and lavatory basin 1, described lavatory basin 1 is by water-filled pipe and waste water holder 4, large hydraulic cylinder 6 and small cylinder 11 are connected in series successively, the bottom of described small cylinder 11 connects outside resource of water supply 14 by supply channel, described large hydraulic cylinder 6 also is connected with lavatory water-storing tank 13 by water-filled pipe, the upper end of large hydraulic cylinder 6 is connected by water-filled pipe with the lower end that is arranged on small cylinder 11, water-storing tank 13 bottoms, described lavatory also connect outside resource of water supply 14 by supply channel, wherein, be provided with large piston 7 in described large hydraulic cylinder 6, be provided with valve piston 10 in described small cylinder 11, described large piston 7 is connected by a piston rod 8 with valve piston 10, the valving that also is provided with control module 15 and the control supply channel that is connected with control module 15 and water-filled pipe conducting or closes., control module 15 described here can adopt the sheet machine, or control chip.Be provided with screen pack 2 on the delivery port of described lavatory basin 1, the bottom of lavatory basin 1 be provided with solid-holding device 3.The upper end of described waste water holder 4 also is provided with overfall 16.
The principle of supercharging is exactly to utilize the larger pressure of tap water own, promotes whole valve piston 10 and moves up.Because large valve piston is connected, large piston 7 one ends are synchronized with the movement.By the switching campaign of valve, the pressure of large hydraulic cylinder is constantly increased.During greater than the pressure of overflow valve, waste water enters the water storage device of the use of flushing the toilet when pressure, thereby has realized the secondary utilization after the supercharging of waste water.
In said process, the diameter proportion of large valve piston is a key factor of the efficient of impact Wastewater secondary utilization pressurizing system of the present invention.We establish large piston straight footpath is D1, and the valve piston diameter is D2, and the pressure of the input tap water of small cylinder is P2, and the pressure of large hydraulic cylinder increases gradually, increases to the setting pressure of overflow valve C, is made as P1.Because large piston and valve piston are linked to be an integral body, so due to the difference of pressure, cause mineralization pressure poor.If the power of valve piston is F2, the power of large piston is F1, satisfies relation:
F2=π×P2×D2
2/4>F1=π×P1×D1
2/4
So piston moves up, the pressure of waste water is risen to P2.
By above analysis, as can be known: realize the raising of water reuse efficient, must increase the diameter proportion of large piston and valve piston, the valve piston diameter is as far as possible little, and large piston diameter is large as far as possible.
The ratio of size piston diameter is that the setting pressure of and overflow valve strong by the tap water side pressure determines;
described valving includes and is connected with control module 15 respectively: be arranged on the unidirectional normally closed solenoid valve A on the supply channel of small cylinder 11 bottoms, be arranged on the normally open solenoid valve B on large hydraulic cylinder 6 and water-filled pipe that small cylinder 11 is communicated with, be arranged on the normal opening one-way valve C on waste water holder 4 and water-filled pipe that large hydraulic cylinder 6 is communicated with, be arranged on the overflow valve D on large hydraulic cylinder 6 and water-filled pipe that lavatory water-storing tank 13 is communicated with, be arranged on the unidirectional normally closed solenoid valve E on the supply channel of lavatory water-storing tank 13 bottoms, and be arranged on the first level sensor 12 on lavatory water-storing tank 13 and be arranged on the second level sensor 5 on large hydraulic cylinder 6.Described valving also includes the fine motion switch contacts 9 that is arranged on small cylinder 11 upper ends.Because control module of the present invention is to adopt simple chip that the folding of electromagnetic valve is controlled, power consumption is few.
As shown in Figure 2, the control method for Wastewater secondary utilization pressurizing system of the present invention comprises the steps:
Whether 1 control module judges needs supplementing water in the water-storing tank of lavatory, be to enter next step, otherwise return to wait state;
2 control modules judge whether large hydraulic cylinder 6 is full, is to enter next step, otherwise enters the 6th step;
3 control modules are controlled and to be arranged on large hydraulic cylinder 6 and to close with normally open solenoid valve B on water-filled pipe that small cylinder 11 is communicated with, and the unidirectional normally closed solenoid valve A that control is arranged on the supply channel of small cylinder 11 bottoms opens;
4 control modules judge whether waste water holder 4 is full, is to enter next step, otherwise continue to judge whether waste water holder 4 is full;
5 control modules are controlled and to be arranged on large hydraulic cylinder 6 and to open with normally open solenoid valve B on water-filled pipe that small cylinder 11 is communicated with, and the unidirectional normally closed solenoid valve A that control is arranged on the supply channel of small cylinder 11 bottoms closes, and then returns to wait state;
The unidirectional normally closed solenoid valve E that 6 control modules are controlled on the supply channel that is arranged on lavatory water-storing tank 13 bottoms opens, and replenishes tap water to lavatory water-storing tank 13;
7 control modules judge whether water-storing tank 13 moisturizings in lavatory are full, are to close unidirectional normally closed solenoid valve E, then return to wait state, otherwise continue to replenish tap water to lavatory water-storing tank 13.
The course of work of Wastewater secondary utilization pressurizing system of the present invention and control method is as follows:
The waste water that lavatory basin 1 produces filters through screen pack 2, enters waste water holder 4.If waste water contains impurity, can be deposited in solid-holding device 3, with the anti-clogging screen pack.And solid-holding device 3 can be cleared up easily.If waste water holder 4 is full, flow out through overfall 16.Then, often opening one-way valve C enters large hydraulic cylinder 6.Large hydraulic cylinder 6 under the Action of Gravity Field of waste water, is in extreme lower position in the above.After large hydraulic cylinder 6 was full of, after obtaining simultaneously lavatory water-storing tank 13 that first sensor 12 transmits and needing the information of supplementing water, control module began a series of control action (control flow chart is seen in concrete action).Whether the effect of the second sensor 5 is to provide large hydraulic cylinder the information that enough can supply the waste water of supercharging.After obtaining first sensor 12 and needing the information of supply, in the situation that judgement the second sensor 5 also allows, normally open solenoid valve B closes, and unidirectional normally closed solenoid valve A opens, often opening one-way valve C autoshutdown.Because the pressure of tap water is very large, and large hydraulic cylinder 6 pressure are very little, and the pressure of tap water promotes valve piston 10 and large piston 7 integral body move up.After the pressure of large hydraulic cylinder reached the setting pressure of overflow valve D, overflow valve was opened, and waste water enters lavatory water-storing tank 13 and stores with certain pressure.If lavatory water-storing tank 13 is full of or large valve piston reaches capacity position is passed to control module by first sensor and the second sensor with information, thereby is closed unidirectional normally closed solenoid valve A, open normally open solenoid valve B, pressurization finishes.At this moment, overflow valve D closes, and the pressure of big or small two hydraulic cylinders reaches balance, normal opening one-way valve C because upper pressure greater than following and open, waste water moves down because gravity promotes large piston, the water of small cylinder and waste water enter large hydraulic cylinder, return to initial position, for next circulation ready.In addition, if lavatory water-storing tank 13 lack of water, and wastewater flow rate would be inadequate, at this moment opens unidirectional normally closed solenoid valve E by control module, directly pours with tap water, guarantees to use normally.Also having a kind of situation is exactly that waste water holder and lavatory water-storing tank all are full of, and the waste water that exceeds capacity will be discharged automatically.
From above analysis, can find out that Wastewater secondary utilization pressurizing system of the present invention and control method have following features: 1) its pressurization is simple, does not need other the energy, has solved the problem of waste water supercharging; 2) whole process can be carried out under the control of control system automatically; 3) have very strong compliance, make simply, do not make troubles to our life when utilizing waste water.So this cover system tool has larger promotional value in today of water resource growing tension.
Claims (6)
1. Wastewater secondary utilization pressurizing system, comprise: lavatory water-storing tank (13) and lavatory basin (1), it is characterized in that, described lavatory basin (1) is by water-filled pipe and waste water holder (4), large hydraulic cylinder (6) and small cylinder (11) are connected in series successively, the bottom of described small cylinder (11) connects outside resource of water supply (14) by supply channel, described large hydraulic cylinder (6) also is connected with lavatory water-storing tank (13) by water-filled pipe, large hydraulic cylinder (6) upper end be arranged on small cylinder (11) lower end and be connected by water-filled pipe, described lavatory water-storing tank (13) bottom also connects outside resource of water supply (14) by supply channel, wherein, be provided with large piston (7) in described large hydraulic cylinder (6), be provided with valve piston (10) in described small cylinder (11), described large piston (7) is connected by a piston rod (8) with valve piston (10), the valving that also is provided with control module (15) and the control supply channel that is connected with control module (15) and water-filled pipe conducting or closes, described valving includes and is connected with control module (15) respectively: be arranged on the unidirectional normally closed solenoid valve (A) on the supply channel of small cylinder (11) bottom, be arranged on the normally open solenoid valve (B) on large hydraulic cylinder (6) and water-filled pipe that small cylinder (11) is communicated with, be arranged on the normal opening one-way valve (C) on waste water holder (4) and water-filled pipe that large hydraulic cylinder (6) is communicated with, be arranged on the overflow valve (D) on large hydraulic cylinder (6) and water-filled pipe that lavatory water-storing tank (13) is communicated with, be arranged on the unidirectional normally closed solenoid valve (E) on the supply channel of lavatory water-storing tank (13) bottom, and be arranged on the first level sensor (12) on lavatory water-storing tank (13) and be arranged on the second level sensor (5) on large hydraulic cylinder (6).
2. Wastewater secondary utilization pressurizing system according to claim 1, is characterized in that, is provided with screen pack (2) on the delivery port of described lavatory basin (1), the bottom of lavatory basin (1) be provided with solid-holding device (3).
3. Wastewater secondary utilization pressurizing system according to claim 1, is characterized in that, described valving also includes the fine motion switch contacts (9) that is arranged on small cylinder (11) upper end.
4. Wastewater secondary utilization pressurizing system according to claim 1, is characterized in that, the upper end of described waste water holder (4) also is provided with overfall (16).
5. Wastewater secondary utilization pressurizing system according to claim 1, is characterized in that, the relation between the diameter D2 of the diameter D1 of described large piston (7) and valve piston (10) satisfies following condition:
F2=π×P2×D2
2/4>F1=π×P1×D1
2/4
Wherein: P2 is the pressure of small cylinder input tap water, and P1 is the setting pressure of overflow valve, and F2 is the power of valve piston, and F1 is the power of large piston.
6. a control method that is used for Wastewater secondary utilization pressurizing system claimed in claim 1, is characterized in that, comprises the steps:
Whether 1) control module judges needs supplementing water in the water-storing tank of lavatory, be to enter next step, otherwise return to wait state;
2) control module judges whether large hydraulic cylinder (6) is full, is to enter next step, otherwise enters the 6th step;
3) control module control normally open solenoid valve (B) cuts out, and controls unidirectional normally closed solenoid valve (A) and opens;
4) control module judges whether waste water holder (4) is full, is to enter next step, otherwise continues to judge whether waste water holder (4) is full;
5) control module control normally open solenoid valve (B) is opened, and controls unidirectional normally closed solenoid valve (A) and closes, and then returns to wait state;
6) the control module unidirectional normally closed solenoid valve of control (E) is opened, and replenishes tap water to lavatory water-storing tank (13);
7) control module judges whether lavatory water-storing tank (13) moisturizing is full, is to close unidirectional normally closed solenoid valve (E), then returns to wait state, otherwise continues to replenish tap water to lavatory water-storing tank (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110231466 CN102392474B (en) | 2011-08-12 | 2011-08-12 | Wastewater secondary utilization pressurizing system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110231466 CN102392474B (en) | 2011-08-12 | 2011-08-12 | Wastewater secondary utilization pressurizing system and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102392474A CN102392474A (en) | 2012-03-28 |
| CN102392474B true CN102392474B (en) | 2013-06-05 |
Family
ID=45859846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110231466 Expired - Fee Related CN102392474B (en) | 2011-08-12 | 2011-08-12 | Wastewater secondary utilization pressurizing system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102392474B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105369850B (en) * | 2015-12-02 | 2018-03-02 | 桂林电子科技大学 | A kind of application method of sanitary wastewater recycling device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0130306A2 (en) * | 1983-06-29 | 1985-01-09 | SCHUBERT & SALZER INGOLSTADT-ARMATUREN GmbH | Method and device for controlling a pipe isolator |
| CN1344846A (en) * | 2001-03-26 | 2002-04-17 | 高海 | Waste water recovering and utilizing apparatus |
| CN2856194Y (en) * | 2005-11-28 | 2007-01-10 | 柴胜伟 | Domestic waste water utilizer |
| CN2876195Y (en) * | 2005-12-20 | 2007-03-07 | 杨修国 | Waste water automatic rising device |
-
2011
- 2011-08-12 CN CN 201110231466 patent/CN102392474B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0130306A2 (en) * | 1983-06-29 | 1985-01-09 | SCHUBERT & SALZER INGOLSTADT-ARMATUREN GmbH | Method and device for controlling a pipe isolator |
| CN1344846A (en) * | 2001-03-26 | 2002-04-17 | 高海 | Waste water recovering and utilizing apparatus |
| CN2856194Y (en) * | 2005-11-28 | 2007-01-10 | 柴胜伟 | Domestic waste water utilizer |
| CN2876195Y (en) * | 2005-12-20 | 2007-03-07 | 杨修国 | Waste water automatic rising device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102392474A (en) | 2012-03-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101892691A (en) | Device and method for automatically feeding water drained by washing machine to close stool | |
| CN202865961U (en) | Foot-pedal water closet | |
| CN103215984A (en) | Rain energy collecting and utilizing system for rainwater at roof of high-rise building | |
| CN201137174Y (en) | Storey water saving system | |
| CN205636935U (en) | Water reuse system in family expenses | |
| CN202337994U (en) | Water-saving natural rainwater resource collection and treatment device | |
| CN102392474B (en) | Wastewater secondary utilization pressurizing system and control method | |
| CN201567632U (en) | Liquid collection type toilet flusher | |
| CN202850091U (en) | Recycled water reuse and rainwater utilization combination water supply system used for floor toilet flushing | |
| CN201627234U (en) | Civil sewage purification and reuse device | |
| CN101113600B (en) | Water saving device for automatically reclaiming domestic waste water | |
| CN202831107U (en) | Wastewater reutilization device of building | |
| CN201512830U (en) | Multifunctional kitchen-toilet water saving device | |
| CN202672286U (en) | Flusher automatically preferentially using wastewater for toilet flushing | |
| CN206090695U (en) | Household water saving device | |
| CN207775971U (en) | Selectivity uses the device that sewage is flushing toiler water supply | |
| CN102840110A (en) | Water supply pressurizing system by utilizing potential energy of high-rise building wastewater | |
| CN101338575A (en) | Civil water saving device | |
| CN109306729A (en) | A kind of electric-controlled type pressurized water-saving flusher | |
| CN201121351Y (en) | Toilet domestic water secondary utilization device | |
| CN201512843U (en) | Toilet flushing device for utilizing human body gravity to lift waste water | |
| CN201406712Y (en) | Full-automatic water saving and emission reducing device | |
| CN201071535Y (en) | Water-saving toilet cistern of closestool | |
| CN201722758U (en) | Convenient and fast reminding type toilet flushing device using waste water | |
| CN212001371U (en) | Water-saving device for public washroom |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20190812 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |