CN101424093B - Household reclaimed water system - Google Patents
Household reclaimed water system Download PDFInfo
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- CN101424093B CN101424093B CN2008102390872A CN200810239087A CN101424093B CN 101424093 B CN101424093 B CN 101424093B CN 2008102390872 A CN2008102390872 A CN 2008102390872A CN 200810239087 A CN200810239087 A CN 200810239087A CN 101424093 B CN101424093 B CN 101424093B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 269
- 239000010865 sewage Substances 0.000 claims abstract description 68
- 238000005406 washing Methods 0.000 claims abstract description 43
- 239000008213 purified water Substances 0.000 claims abstract description 31
- 239000002351 wastewater Substances 0.000 claims abstract description 23
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 10
- 230000001954 sterilising effect Effects 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims description 12
- 238000003287 bathing Methods 0.000 claims description 8
- 238000004332 deodorization Methods 0.000 claims description 4
- 239000010797 grey water Substances 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 230000037452 priming Effects 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 239000008399 tap water Substances 0.000 description 8
- 235000020679 tap water Nutrition 0.000 description 8
- 239000010842 industrial wastewater Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004887 air purification Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to a domestic reclaimed water system, which comprises the following steps: the sewage of a hand basin, a washing machine and a bathtub enters into a wastewater filter box through a pipeline; then the filtered water is pumped into a sewage storage tank with a V-shaped bottom or a purified water storage tank with the V-shaped bottom by a self-priming water pump through the pipeline; an ozone device sends ozone into the sewage storage tank with the V-shaped bottom or the purified water storage tank with the V-shaped bottom through the pipeline for disinfection, sterilization, and odor removal; the recycled water treated in the sewage storage tank with the V-shaped bottom is sent to a water tank of a toilet bowl and a pier water pond through the pipeline respectively; the water treated in the purified water storage tank with the V-shaped bottom is sent to the washing machine for washing for the first time through the pipeline respectively; the wastewater filter box, the sewage storage tank with the V-shaped bottom and the purified water storage tank with the V-shaped bottom are provided with a water level switch respectively; and an automatic control device controls each water level switch and controls the switching actions of each part of the self-priming water pump and the ozone device so as to achieve normal water storage, processing and recycling of the entire domestic reclaimed water system. The domestic reclaimed water system is controlled full-automatically and is convenient to use, thus the domestic reclaimed water system is applicable to bathrooms of families, enterprises, public places and the like.
Description
Technical Field
The invention belongs to the field of reclaimed water treatment, and particularly relates to a household reclaimed water system for treating, storing and recycling sewage.
Background
The reclaimed water is a water-saving reusable water which is provided for solving the problem of shortage of urban water resources; meanwhile, the sewage discharge can be reduced, so that water resources can be fully utilized, and the living pressure brought to people due to rising of water price is reduced; the large-scale popularization and application of reclaimed water are good methods for saving water resources, benefiting the nation and the people and benefiting the offspring.
The medium water system generally has two modes: one way is to treat the bath water and then use the bath water for toilet bowl, sanitary cleaning and the like, which are generally used in hotels, office buildings, bath centers and the like; the other method is to filter the industrial wastewater, send the industrial wastewater into a regulating reservoir, send the industrial wastewater into a water storage tank after chemical reaction, and then recycle the industrial wastewater, which is generally used by enterprises, chemical plants and the like.
There is also a method, such as "a household reclaimed water system" disclosed in patent document CN1310273A, which comprises a high-low level reclaimed water tank, a water lifting device, a pipeline, and a valve, and collects the waste water of the user and lifts the waste water to the high-level reclaimed water tank for the user to reuse. There are three methods of lifting water, i.e., driving a water pump with a water turbine, driving a water pump with a drain pump of a washing machine, and driving the water pump with an automatically controllable motor.
However, the application of the above-mentioned method to a household reclaimed water system has three problems: firstly, the method comprises the following steps: storage of large amounts of reclaimed water in the home; secondly, the method comprises the following steps: removing odor, sterilizing and disinfecting by using reclaimed water; thirdly, the method comprises the following steps: the problem of automatic utilization of reclaimed water in daily life.
Disclosure of Invention
The invention aims to overcome the defects of the background art and provide a domestic reclaimed water system for sewage treatment, storage and reuse, so that water resources can be fully utilized.
The invention filters the waste water used by wash basin, bathtub, washing machine and other bath appliances into reclaimed water through a filter device, and then the reclaimed water is pumped to a sewage water storage tank with V-shaped bottom and a purified water storage tank with V-shaped bottom which are provided with an ozone generating device through a water pump; then the water is connected to a toilet bowl and a washing machine for use, and drinkable water is not used as much as possible for washing and flushing the toilet bowl for the first time of the washing machine, so that the aim of saving water is fulfilled.
The technical scheme of the invention is as follows:
a domestic greywater system comprising: sewage storage water tank, water purification storage water tank, self priming water pump, water level switch, pipeline, valve at the bottom of V-arrangement, its characterized in that: sewage discharge of the hand washing basin, the washing machine and the bathtub is to enter a wastewater filter box through a pipeline; then the filtered water is sent into a sewage storage tank with a V-shaped bottom or a purified water storage tank with a V-shaped bottom by a self-priming water pump through a pipeline; the ozone device sends ozone to the sewage storage tank with the V-shaped bottom or the purified water storage tank with the V-shaped bottom through a pipeline for disinfection, sterilization and deodorization; the reclaimed water treated in the sewage storage tank with the V-shaped bottom is respectively sent to a water tank of a toilet and a pier water tank through pipelines; the water treated in the purified water storage tank with the V-shaped bottom is respectively sent to a washing machine for washing for the first time through a pipeline; the wastewater filter tank, the sewage storage tank with the V-shaped bottom and the purified water storage tank with the V-shaped bottom are respectively provided with a water level switch; the automatic control device controls the water level switches and the opening and closing actions of the parts of the self-priming water pump and the ozone device, so that the normal water storage, treatment and recycling of the whole household reclaimed water system are realized.
A filter is arranged in the wastewater filtering tank; wherein,
the wastewater filtering box is connected with sewage discharged by the hand basin, the washing machine and the bathtub through pipelines; after the filtration treatment, the filtered water is sent into a sewage storage tank with a V-shaped bottom by a self-priming water pump through a pipeline;
the other wastewater filtering tank is connected with the drainage valves of the washing machine and the bathtub; filtering the relatively clean water after rinsing and bathing, and sending the filtered water into a special purified water storage tank by a self-priming water pump through a pipeline;
the waste water filter tank is connected with the sewage water storage tank with the V-shaped bottom and the reclaimed water outlet pipe of the purified water storage tank with the V-shaped bottom; after the water in the sewage storage tank at the bottom of the V-shaped is filtered, the filtered water is sent into the purified water storage tank at the bottom of the V-shaped by a self-priming water pump through a pipeline.
The bottoms of the sewage storage tank with the V-shaped bottom and the purified water storage tank with the V-shaped bottom are in a V shape; and covers are arranged on the sewage storage tank with the V-shaped bottom and the purified water storage tank with the V-shaped bottom; and is provided with a connector connected with the ozone device pipeline; the sewage storage tank and the water purification storage tank at the bottom of V-arrangement set up in the top of bathroom furred ceiling to can set up a plurality of water tanks according to the structure of bathroom furred ceiling, with the idle space of make full use of bathroom.
The invention has the advantages that: because of the V-arrangement bottom water tank is put on the roof, can place the water tank of different quantity according to the space size of bathroom furred ceiling top, furthest utilizes bathroom idle space, does not occupy the usage space of bathroom simultaneously. The sewage storage tank with the V-shaped bottom and the water purification storage tank with the V-shaped bottom adopt a V-shaped inclined bottom structure, and the reclaimed water pipeline can be connected with the lowest end of the bottom of the water tank, so that reclaimed water can be thoroughly emptied from the water tank, and the cleaning-free effect is achieved; the ozone accessory can disinfect, sterilize and deodorize the sewage storage tank with the V-shaped bottom and the purified water storage tank with the V-shaped bottom so as to purify the air in the toilet; under the conditions of power failure and water cut-off, the water in the sewage water storage tank with the V-shaped bottom and the water in the pure water storage tank with the V-shaped bottom can be used normally; the cold water put in the washing machine in the earlier stage of washing the face can be reused for the first washing of the washing machine; the invention is fully automatically controlled, is convenient to use and is suitable for toilets of families, enterprises, public places and the like.
Drawings
FIGS. 1-1 and 1-2 are schematic views of a domestic reclaimed water system according to the present invention.
FIG. 2 is a sectional view of the sewage storage tank with V-shaped bottom and the purified water storage tank with V-shaped bottom.
Fig. 3 is a schematic diagram of the circuit control of the present invention.
Wherein the reference numerals are: 1. a sewage storage tank with a V-shaped bottom; 2. an ozone delivery conduit; 3. a reclaimed water pipe; 4. a breather pipe; 5. ceiling corners; 6. a ceiling board; 7. a toilet bowl; 8. a tap water inlet valve; 9. a tap water check valve; 10. the drain valve is integrated with a switch; 1. a sewer pipe; 12. a water pump check valve; 131. 132, 133, self-priming pumps; 14. an ozone unit; 151. 152, 153, a filter box; 161. 162, 163 and a water level switch of the filter tank; 17. a high water level switch; 18. a low water level switch; 19. a tap water pipe; 20. a hand basin; 21. a bathtub; 22. a washing machine; 231. 232, a water outlet valve of the washing machine; 241. 242 washing machine inlet valves; 25. a water heading pool; 261. 262, a bathtub water outlet valve; 27. a pier pool switch; 28. a filter device fixing box; 29. a water drainage switch; 30. a purified water storage tank with a V-shaped bottom.
Detailed Description
The invention will be further explained with reference to the drawings and the embodiments.
As shown in fig. 1-2, the working flow of the household reclaimed water system of the present invention is as follows:
wastewater used by bathing appliances such as a washbasin 20, a bathtub 21, a washing machine 22 and the like flows into the filter tank 151 through the reclaimed water pipe 3, and the water level of the filter tank 151 rises at the moment; the filtering tank 151 is provided with a water level switch 161; when the water level rises to the filter tank water level switch 161, the filter tank water level switch 161 is closed; at this time, the self-priming water pump 131 is electrified to start working; pumping the treated reclaimed water in the filter tank 151 into a special sewage storage tank 1 with a V-shaped bottom; when water in the wash basin 20, the bathtub 21, the washing machine 22 and other bath appliances is drained, the water level switch 161 of the filter tank is automatically switched off, and the self-priming water pump 131 is powered off and stops working at the moment and returns to the initial state;
when the wash basin 20, the bathtub 21, the washing machine 22 and other bath appliances generate waste water continuously, the self-priming water pump 131 can pump water into the sewage storage tank 1 with the V-shaped bottom continuously, so that the water level in the sewage storage tank 1 with the V-shaped bottom continuously rises; a high water level switch 17 is arranged in the sewage storage tank 1 with the V-shaped bottom; when the sewage storage tank 1 with the V-shaped bottom is filled with water, the high water level switch 17 is automatically closed, and the relay is electrified; the self-priming water pump 131 is automatically powered off due to relay control; the circuit of the sewer switch 29 is automatically electrified, and the sewer valve integrated switch 10 is automatically opened; waste water generated by all bathing appliances such as the hand basin 20, the bathtub 21, the washing machine 22 and the like flows to the sewer pipe 1, so that excessive water cannot overflow a water tank because the excessive water is pumped to the sewage storage tank 1 with the V-shaped bottom by a self-priming pump; when the wash basin 20, the bathtub 21, the washing machine 22 and other bath appliances stop the wastewater from flowing into the sewer pipe 11, the water level switch 161 of the filter tank is switched off, the relay is powered off, meanwhile, the sewer switch 29 is automatically powered off, and the sewer valve integrated switch 10 is automatically closed to return to the initial state;
when the water level in the sewage storage tank 1 with the V-shaped bottom is lower than the lower limit of the water level, the low water level switch 18 is automatically closed, the tap water inlet valve 8 is electrified, and tap water is injected into the sewage storage tank 1 with the V-shaped bottom; when the water level in the sewage storage tank 1 with the V-shaped bottom is higher than the lower limit of the water level, the low water level switch 18 is automatically opened, the tap water inlet valve 8 is powered off, and the original state is returned;
when the rinsing water of the washing machine 22 (the water is cleaner than the washing water) is discharged, the washing machine 22 will automatically open the water outlet valve 232 of the washing machine, and the water is pumped to the purified water storage tank 30 with the V-shaped bottom by the self-priming water pump 132 after being filtered by the filter box 152 for storage; when the washing machine 22 is used for washing, the water inlet valve 242 of the washing machine is opened, and water in the purified water storage tank 30 with the V-shaped bottom directly enters the washing machine 22 to finish washing, so that the running water is saved for purifying water for washing; (note: the washing machine must be a double inlet valve and a double outlet valve; the double inlet valve means that the inlet valve 241 is a tap water inlet valve, the inlet valve 242 is a water inlet valve of a V-shaped bottom purified water storage tank; the double outlet valve means that the outlet valve 231 is a sewage outlet valve, and the outlet valve 232 is a purified water outlet valve.)
After bathing, if the water after bathing is clean, the bathtub water outlet valve 262 can be manually opened, and at the moment, the water is pumped into the purified water storage tank 30 with the V-shaped bottom by the self-priming water pump 132 through the filter tank 152 for storage and is reused when the washing machine 22 washes; when the water after bathing is dirty, the bathtub water outlet valve 261 can be manually opened, and at the moment, the water is pumped into the sewage storage tank 1 with the V-shaped bottom by the self-priming water pump 131 through the filter box 151 for storage and is used when the toilet bowl 7 pumps water;
when the pier water tank switch 27 is opened, water in the sewage storage tank 1 with the V-shaped bottom flows to the pier water tank 25; the waste water used by the pier water tank 25 can directly flow into the filter tank 151 and then is pumped into the water storage tank 1 with the V-shaped bottom by the self-priming water pump 131 for storage so as to be reused when the toilet bowl 7 is flushed;
when the water in the sewage storage water tank 1 is sufficient at the bottom of the V-arrangement, the water in the sewage storage water tank 1 can flow to the filter box 153 through the reclaimed water pipe 3 and secondary filtration reaches the upper limit of the water level when the water in the filter box 153 reaches, the filter box water level switch 17 is closed, the self-priming water pump 133 starts to work, the water filtered by the filter box 153 is pumped by the self-priming water pump 133 and stored in the clean water storage water tank 30 at the bottom of the V-arrangement, and the reclaimed water can be better utilized.
Wherein, the running water check valve 8, the water pump check valve 12 and the like can prevent water from flowing backwards.
When power is off, the integrated switch 10 of the water outlet valve can be manually opened, and then the sewage generated by the bathing appliances such as the hand basin 20, the bathtub 21, the washing machine 22 and the like is directly discharged into a sewer.
As shown in fig. 2, the sewage storage tank 1 with a V-shaped bottom and the purified water storage tank 30 with a V-shaped bottom adopt a V-shaped inclined bottom structure, so that the reclaimed water pipe 3 can be connected with the lowest end of the bottom of the water tank, the reclaimed water can be thoroughly emptied from the water tank, and the effect of no cleaning is achieved.
The sewage storage tank 1 at the bottom of the V-shaped and the purified water storage tank 30 at the bottom of the V-shaped can be used for placing water tanks with different quantities according to the space above the suspended ceiling of the toilet, so that the idle space of the toilet is utilized to the maximum extent, and meanwhile, the use space of the toilet is not occupied.
The sewage storage tank 1 with the V-shaped bottom and the pure water storage tank 30 with the V-shaped bottom can generate ozone at fixed time through the circuit control in the ozone machine 14, because the ozone conveying pipeline 2 is connected between each sewage storage tank 1 with the V-shaped bottom and the pure water storage tank 30 with the V-shaped bottom, when ozone is input into the storage tanks, ozone is generated in all the sewage storage tanks 1 with the V-shaped bottom and the pure water storage tanks 30 with the V-shaped bottom, thereby achieving the purposes of disinfection, sterilization, deodorization and air purification, leading reclaimed water to be stored in the sewage storage tanks 1 with the V-shaped bottom and the pure water storage tanks 30 with the V-shaped bottom for a long time without generating odor, leading the sewage storage tanks 1 with the V-shaped bottom and the pure water storage tanks 30 with the V-shaped bottom to be in gas circulation by the connection of the vent pipe 4 between each sewage storage tank 1 with the V-shaped bottom and the pure water storage tanks 30 with the V-, the same water level is ensured.
Fig. 3 is a schematic diagram of the circuit control of the present invention, which is specifically illustrated as follows:
controlling a water pump: when water exists in the filter tank 151 and the sewage storage tank 1 with the V-shaped bottom is not full, the water level switch S1 of the filter tank is closed, the self-priming water pump 131 is automatically controlled to be started, and water is injected into the sewage storage tank 1 with the V-shaped bottom; when the filter 151 is empty of water or the sewage storage tank 1 with the V-shaped bottom is full of water, the water level switch Sl of the filter tank is disconnected, and the self-priming water pump 131 stops working;
controlling a sewer valve: when water exists in the filter tank 151 and the sewage storage tank 1 with the V-shaped bottom is full of water, the high water level switch S2 of the sewage storage tank 1 with the V-shaped bottom is closed, the relay Kl is attracted, and the self-priming water pump 131 stops working; meanwhile, the automatic sewer valve K2 is opened to discharge water into a toilet sewer;
automatic water feeding control: when the sewage storage tank 1 with the V-shaped bottom is empty, the low water level switch S3 of the sewage storage tank 1 with the V-shaped bottom is closed, the tap water inlet valve K3 is opened, and water is automatically supplied;
automatic sewage treatment: when the water equipment is used for draining water, the ozone machine 14 is controlled at regular time, and automatically generates and adds ozone to play roles in sterilization, disinfection and deodorization.
Claims (3)
1. A domestic greywater system comprising: special sewage storage water tank, special water purification storage water tank, self priming water pump, water level switch, pipeline, valve, its characterized in that: sewage discharge of the hand washing basin, the washing machine and the bathtub is to enter a wastewater filter box through a pipeline; then the filtered water is sent into a special sewage water storage tank or a special purified water storage tank by a self-priming water pump through a pipeline; the ozone device sends ozone to the special sewage storage tank or the special purified water storage tank through a pipeline for disinfection, sterilization and deodorization; the reclaimed water treated in the special sewage storage tank is respectively sent to a toilet water tank and a pier water tank through pipelines; a water level switch is respectively arranged in the wastewater filter tank and the special wastewater storage tank or the special purified water storage tank; the automatic control device controls the water level switches and the opening and closing actions of the parts of the self-priming water pump and the ozone device so as to realize normal water storage, treatment and reutilization of the whole household reclaimed water system; wherein,
the waste water filtering tank is provided with a filter;
the wastewater filtering box is connected with sewage discharged by the hand basin, the washing machine and the bathtub through pipelines; after the filtration treatment, the filtered water is sent into a special sewage storage tank by a self-priming water pump through a pipeline;
the other wastewater filtering tank is connected with the drainage valves of the washing machine and the bathtub; filtering the relatively clean water after rinsing and bathing, and sending the filtered water into a special purified water storage tank by a self-priming water pump through a pipeline;
the waste water filter tank is connected with the reclaimed water outlet pipe of the special sewage storage tank and the special purified water storage tank; after the water in the special sewage storage tank is filtered, the filtered water is sent into the special purified water storage tank by the self-priming water pump through a pipeline.
2. A domestic greywater system according to claim 1, characterized in that: the bottom of the special sewage storage tank or the special purified water storage tank is in a V shape; the reclaimed water pipeline can be connected with the lowest end of the bottom of the water tank, so that reclaimed water can be thoroughly emptied from the water tank, and the cleaning-free effect is achieved; a cover is arranged on the special water storage tank; and is provided with a connector connected with the ozone device pipeline.
3. A domestic greywater system according to claim 1, characterized in that: the special water storage tank is arranged above the suspended ceiling of the toilet, and a plurality of water tanks can be arranged according to the structure of the suspended ceiling of the toilet, so that the idle space of the toilet is fully utilized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102390872A CN101424093B (en) | 2008-12-08 | 2008-12-08 | Household reclaimed water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102390872A CN101424093B (en) | 2008-12-08 | 2008-12-08 | Household reclaimed water system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101424093A CN101424093A (en) | 2009-05-06 |
| CN101424093B true CN101424093B (en) | 2010-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102390872A Expired - Fee Related CN101424093B (en) | 2008-12-08 | 2008-12-08 | Household reclaimed water system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104652551A (en) * | 2015-02-02 | 2015-05-27 | 毕文山 | Washing machine wastewater collection, treatment, storage and reutilization device |
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| CN102518183B (en) * | 2011-12-28 | 2015-01-21 | 北京洛可可科技有限公司 | Household reclaimed water system |
| CN102733457B (en) * | 2012-07-01 | 2014-08-20 | 王介孚 | Reusable water collecting tank |
| CN103882919A (en) * | 2014-02-20 | 2014-06-25 | 扬州工业职业技术学院 | Water recovery comprehensive utilizing device in bathroom |
| CN106284541A (en) * | 2015-06-09 | 2017-01-04 | 姜成华 | Family domestic sewage reclamation set |
| CN105483981A (en) * | 2015-12-04 | 2016-04-13 | 无锡小天鹅股份有限公司 | Water sucking assembly for clothes washing machine and clothes washing device with water sucking assembly |
| CN105692944B (en) * | 2016-03-21 | 2018-05-04 | 青岛智承机电科技有限公司 | Non-point pollution source abatement device |
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| CN109319965A (en) * | 2017-03-01 | 2019-02-12 | 肖华林 | A kind of air filtering assembly of Multifunction drink water all-in-one machine |
| CN106830484A (en) * | 2017-03-01 | 2017-06-13 | 台州河云机械有限公司 | One kind is washed one's hands drinking all-in-one machine |
| CN106906869A (en) * | 2017-03-02 | 2017-06-30 | 中国建筑设计院有限公司 | A kind of side-stand type reclaimed water water storage and treatment for reuse system for toilet |
| JP2019208546A (en) * | 2018-05-31 | 2019-12-12 | 日立グローバルライフソリューションズ株式会社 | Washing machine |
| CN109987754B (en) * | 2019-05-22 | 2021-06-25 | 山东大学 | Full-automatic intelligent household water recycling device, system and method |
| CN115445312B (en) * | 2022-08-15 | 2023-07-25 | 南京大学 | Household flushing water treatment toilet flushing recycling equipment and method thereof |
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2008
- 2008-12-08 CN CN2008102390872A patent/CN101424093B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652551A (en) * | 2015-02-02 | 2015-05-27 | 毕文山 | Washing machine wastewater collection, treatment, storage and reutilization device |
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| CN101424093A (en) | 2009-05-06 |
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