CN203112610U - RO (reverse osmosis) water purifier - Google Patents

RO (reverse osmosis) water purifier Download PDF

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Publication number
CN203112610U
CN203112610U CN 201320051011 CN201320051011U CN203112610U CN 203112610 U CN203112610 U CN 203112610U CN 201320051011 CN201320051011 CN 201320051011 CN 201320051011 U CN201320051011 U CN 201320051011U CN 203112610 U CN203112610 U CN 203112610U
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China
Prior art keywords
water
reverse osmosis
valve
switch
pipeline
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Expired - Fee Related
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CN 201320051011
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Chinese (zh)
Inventor
何明
周勇
向海涛
王彤
杨勇
张弛
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Abstract

The utility model discloses an RO water purifier which comprises a front-mounted filtering device, a reverse osmosis membrane filtering device, a rear-mounted filtering device, a purified water outlet device, a pressure barrel, a third switching valve, a concentrated water backflow branch, a water quality monitoring device and a control device, wherein the third switching valve is connected to a pipeline between a concentrated water outlet of the reverse osmosis membrane filtering device and a first regulating valve; a first end of the concentrated water backflow branch is connected to a pipeline between the concentrated water outlet of the reverse osmosis membrane filtering device and the third switching valve, and a second end is connected to a pipeline between the front-mounted filtering device and a booster pump; the water quality monitoring device is used for monitoring the water quality at the purified water outlet of the reverse osmosis membrane filtering device in real time, and transmitting to the control device; and the control device is used for controlling switches of a first switching valve, a second switching valve, the third switching valve and a fourth switching valve. The RO water purifier disclosed by the utility model reduces concentrated water discharge capacity, improves the comprehensive recovery rate of tap water greatly, and guarantees service lives of various levels of filter elements.

Description

Reverse osmosis water purifier
Technical field
The utility model relates to the device of water treatment, especially a kind of reverse osmosis water purifier.
Background technology
Reverse osmosis water purifier generally is with reverse osmosis membrane front filter, water pump and reverse osmosis membrane filt, and former water can be divided into pure water and dense water through behind the reverse osmosis membrane filt.The pure water that reverse osmosis water purifier produces reaches the water quality standard of the Ministry of Health, and is capable of direct drinking, and dense water usually directly emits.The water treatment technological process of conventional reverse osmosis water-purifying machine is as shown in Figure 1:
After tap water comes out from tee ball valve 1 through the cotton filter core 2 of PP, low-tension switch 3, particle charcoal filter core 4, carbon rod filter core 5, magnetic valve 6, under meter 7 and topping-up pump 8 enter reverse osmosis membrane filtration device 9, under the crown_interception of the supercharging of topping-up pump 8 and dense water regulating valve 16, reverse osmosis membrane filtration device 9 is worked under certain working pressure, water through the reverse osmosis membrane filtration device can be divided into pure water and dense water, pure water can be introduced pressure pot 13 through high-voltage switch gear 12 and store with standby, perhaps filters the back again by rearmounted filtration unit 14 and directly drinks from water tap 15 discharges.Magnetic valve 11 can be controlled the flushing of reverse osmosis membrane filtration device 9.Check valve 10 can prevent that made pure water from refluxing.
The pure water that existing reverse osmosis water purifier can reach and the ratio of dense water are 1: 3, namely make 1 ton pure water, then there is 3 tons concentrated water discharge to slattern, the rate of recovery is 25% (rate of recovery is an important indicator of reverse osmosis water purifier, equals the ratio of the central made pure water of reverse osmosis water purifier of water process processed and wastage in bulk or weight tap water).For a family of 3 mouthfuls that reverse osmosis water purifier has been installed, need use 2 tons pure water half a year, and this means just has 6 tons dense water waste.
Summary of the invention
At above-mentioned prior art present situation, technical problem to be solved in the utility model is, provides a kind of comprehensive recovery high reverse osmosis water purifier, with water saving, improves the serious phenomenon of reverse osmosis water purifier concentrated water discharge.
In order to solve the problems of the technologies described above, a kind of reverse osmosis water purifier provided by the utility model, comprise preposition filtration unit, topping-up pump, the reverse osmosis membrane filtration device, rearmounted filtration unit, the pure water discharging device, pressure pot and control device, the water-in of described preposition filtration unit is communicated with the tap water outlet, the water outlet of described preposition filtration unit is communicated with the original water inlet of described reverse osmosis membrane filtration device through first switch-valve and described topping-up pump, the pure water outlet of described reverse osmosis membrane filtration device is divided into two-way, one the tunnel is communicated with described pressure pot through high-voltage switch gear, another road is communicated with described pure water discharging device through described rearmounted filtration unit, the dense water out of described reverse osmosis membrane filtration device is communicated with first variable valve mutually arranged side by side and second switch valve, and described reverse osmosis water purifier also comprises
The 3rd switch-valve, it is connected on the dense water out and the pipeline between described first variable valve of described reverse osmosis membrane filtration device;
The concentrate recirculation branch road, it is provided with the 4th switch-valve, first end of described concentrate recirculation branch road is connected on the dense water out and the pipeline between described the 3rd switch-valve of described reverse osmosis membrane filtration device, and second end is connected on the pipeline between described preposition filtration unit and the described topping-up pump;
Water monitoring device is used for the water quality in the pure water exit of the described reverse osmosis membrane filtration device of monitoring in real time, and transfers to described control device;
Described control device is used for controlling according to the monitoring result of water monitoring device the switch of described first switch-valve, described second switch valve, described the 3rd switch-valve and described the 4th switch-valve.
Therein among embodiment, second end of described concentrate recirculation branch road is connected on the pipeline between described preposition filtration unit and described first switch-valve or is connected on the pipeline between described first switch-valve and the described topping-up pump.
Among embodiment, also be provided with the 3rd variable valve on described concentrate recirculation branch road therein, the 3rd variable valve is arranged at the front side along water (flow) direction of described the 4th switch-valve.
Among embodiment, also be provided with first check valve on described concentrate recirculation branch road therein, this first check valve is arranged at the front side along water (flow) direction of described the 4th switch-valve.
Therein among embodiment, described reverse osmosis water purifier also comprises ultrafiltration membrane filter device and water purification discharging device, the original water inlet of described ultrafiltration membrane filter device is communicated with second end of described concentrate recirculation branch road, the pure water inlet of described ultrafiltration membrane filter device is communicated with described water purification discharging device, and the dense water out of described ultrafiltration membrane filter device is connected on the pipeline between described preposition filtration unit and described first switch-valve.
Therein among embodiment, described reverse osmosis water purifier also comprises ultrafiltration membrane filter device and water purification discharging device, the original water inlet of described ultrafiltration membrane filter device is connected on the pipeline between described preposition filtration unit and described first switch-valve or is connected on the pipeline between described first switch-valve and the described topping-up pump, the pure water inlet of described ultrafiltration membrane filter device is communicated with described water purification discharging device, and the dense water out of described ultrafiltration membrane filter device is connected on the dense water out and the pipeline between described the 3rd switch-valve of described reverse osmosis membrane filtration device through second check valve.
Among embodiment, described water monitoring device comprises water quality probe and thermo-bulb therein.
Among embodiment, described topping-up pump is big flow topping-up pump therein.
Among embodiment, described preposition filtration unit comprises the cotton filter core of the PP that is in series and particle charcoal filter core therein.
Among embodiment, described reverse osmosis water purifier also comprises low-tension switch therein, and this low-tension switch is connected on the pipeline between the cotton filter core of described PP and the described particle charcoal filter core.
Compared with prior art, reverse osmosis water purifier provided by the utility model is introduced the concentrate recirculation branch road, before the dense water that utilizes the concentrate recirculation branch road that the reverse osmosis membrane filtration device is discharged turns back to first switch-valve, utilize the water quality of the made pure water of water monitoring device on-line monitoring system simultaneously, control device is according to the monitoring result control water state processed of water monitoring device.Reverse osmosis water purifier of the present utility model has reduced concentrated water drainage high-volume greatly, has improved the comprehensive recovery of tap water significantly, and has guaranteed the work-ing life of filter cores at different levels.
Description of drawings
Fig. 1 is the structural representation of reverse osmosis water purifier of the prior art;
Fig. 2 is the structural representation of the reverse osmosis water purifier among the utility model embodiment one;
Fig. 3 is the structural representation of the reverse osmosis water purifier among the utility model embodiment two;
Fig. 4 is the structural representation of the reverse osmosis water purifier among the utility model embodiment three.
The meaning of each label is as follows among Fig. 2 to Fig. 4: 1-tee ball valve, the cotton filter core of 2-PP, 3-low-tension switch, 4-particle charcoal filter core, 5-ultrafiltration membrane filter device, 6-first switch-valve, the 7-under meter, 8-topping-up pump, 9-reverse osmosis membrane filtration device, the 10-reverse checkvalve, 11-second switch valve, 12-high-voltage switch gear, 13-bucket ball valve, 14-pressure pot, the rearmounted filtration unit of 15-, 16-the 3rd switch-valve, 17-pure water discharging device, 18-first variable valve, 19-first check valve, the 20-thermo-bulb, 21-water quality probe, 22-the 4th switch-valve, 23-the 3rd variable valve, 24-water purification discharging device, 25-second check valve.
Embodiment
Also in conjunction with the embodiments the utility model is elaborated below with reference to accompanying drawing.Need to prove, under the situation of not conflicting, below feature among each embodiment and the embodiment can make up mutually.
Embodiment one
As shown in Figure 2, the reverse osmosis water purifier in the present embodiment comprises preposition filtration unit, reverse osmosis membrane filtration device 9, rearmounted filtration unit 15, pure water discharging device 17, pressure pot 14, concentrate recirculation branch road, water monitoring device and control device.
Wherein, preposition filtration unit is used for former water is carried out pre-treatment, to guarantee the former water water inlet requirement of reverse osmosis membrane filtration device.The water-in of preposition filtration unit is communicated with running water pipe through tee ball valve 1, and the water outlet of preposition filtration unit is communicated with the original water inlet of reverse osmosis membrane filtration device 9 through first switch-valve 6 and topping-up pump 8.Preferably, the preposition filtration unit in the present embodiment adopts the form that the cotton filter core 2 of PP and particle charcoal filter core 4 are in series.Preferably, be connected with low-tension switch 3 on the pipeline between the cotton filter core 2 of described PP and the particle charcoal filter core 4.Low-tension switch 3 plays the effect that detects tap water pressure, when tap water is cut off the water supply, reverse osmosis water purifier can not be worked.
First switch-valve 6 plays the effect of cutting off the water route, closes the water route when reverse osmosis water purifier is not worked.Preferably, between first switch-valve 6 and preposition filtration unit, be provided with under meter 7.Under meter 7 can be added up the water yield that flows through, to remind user's renew cartridge more on time.
Topping-up pump 8 is used for supercharging.Preferably, topping-up pump 8 is high-capacity pump, can guarantee big flow like this under the operating pressure of reverse osmosis membrane filtration device 9.
Reverse osmosis membrane filtration device 9 is worked under the effect of damming of the supercharging of topping-up pump 8 and first variable valve 18.Be divided into two-way behind the pure water outlet process reverse checkvalve 10 of reverse osmosis membrane filtration device 9 and the water monitoring device; one the tunnel enters pressure pot 14 through high-voltage switch gear 12 with a bucket ball valve 13 stores with standby, and high-voltage switch gear 12 plays the effect of judging that the control of pressure pot 14 full waters is shut down.Another road is filtered the back again by rearmounted filtration unit 15 and is directly drunk from 17 discharges of pure water discharging device.Rearmounted filtration unit 15 is used for further purifying pure water, and the rearmounted filtration unit 15 in the present embodiment adopts the charcoal filter core.Pure water discharging device 17 is water tap or other discharging device.
Water monitoring device is used for detecting the water quality of pure water in real time and being sent to control device.Preferably, described water monitoring device comprises water quality probe 21 and thermo-bulb 20, and water quality probe 21 and thermo-bulb 20 are arranged in the pure water outlet and the pipeline between described high-voltage switch gear 12 and the described rearmounted filtration unit 15 of described reverse osmosis membrane filtration device 9.Thermo-bulb 20 and water quality probe 21 can reflect the water quality quality of pure water exactly.
The dense water out of reverse osmosis membrane filtration device 9 is connected with second switch valve 11 with first variable valve 18 mutually arranged side by side through the 3rd switch-valve 16.Second switch valve 11 can play the washing action to the reverse osmosis membrane filtration device, and when second switch valve 11 was opened, reverse osmosis membrane filtration device 9 washed under the pressure not having, and the stores on film surface is rinsed well, to guarantee the life-span of reverse osmosis membrane filtration device 9.
The concentrate recirculation branch road is used for the dense water that reverse osmosis membrane filtration device 9 is discharged is caused reverse osmosis membrane filtration device 9 original water inlet sides, to recycle and reuse dense water.First end of concentrate recirculation branch road is connected on the dense water out and the pipeline between described the 3rd switch-valve 16 of described reverse osmosis membrane filtration device 9, and second end is connected on the pipeline between described under meter 7 and described first switch-valve 6.Concentrate recirculation branch road upper edge water (flow) direction in the present embodiment is connected with the 4th switch-valve 22, the 3rd variable valve 23 and first check valve 19 in turn, the 4th switch-valve 22 is used for disconnection and the conducting of control concentrate recirculation branch road, the operating pressure that the 3rd variable valve 23 is used for regulating reverse osmosis membrane apparatus when refluxing, flow reversal was passed through when first check valve 19 was used for preventing the reverse osmosis water purifier standby.Preferably, the concentrate recirculation branch road is provided with ultrafiltration membrane filter device 5, the original water inlet of ultrafiltration membrane filter device 5 is communicated with first check valve 19, and the pure water outlet of ultrafiltration membrane filter device 5 is communicated with water purification discharging device 24, and water purification discharging device 24 can provide water purification for people to use.Water purification discharging device 24 is water tap or other discharging devices.The dense water out of ultrafiltration membrane filter device 5 is connected on the pipeline between described under meter 7 and described first switch-valve 6.
Described control device is used for controlling the switch of described first switch-valve 6, described second switch valve 11, described the 3rd switch-valve 16 and described the 4th switch-valve 22 according to the monitoring result of water monitoring device, thereby reverse osmosis water purifier is worked under normal aqueous mode processed, concentrate recirculation pattern and rinse mode.Described first switch-valve 6 in the present embodiment, described second switch valve 11, described the 3rd switch-valve 16 and described the 4th switch-valve 22 are magnetic valve.
Below the principle of work of originally executing the reverse osmosis water purifier in the example is described:
1, normal aqueous mode processed
At first when low-tension switch 3 reaches the operating pressure value, system at first enters normal aqueous mode processed, at this moment first switch-valve 6 is opened, topping-up pump 8 work, the 3rd switch-valve 16 is opened, and the 4th switch-valve 22 and second switch valve 11 are closed, at this moment because the crown_interception of first variable valve 18, reverse osmosis membrane filtration device 9 will be under certain pressure water processed, made pure water is by reverse checkvalve 10, thermo-bulb 20, water quality probe 21 enters pressure pot 14 and stores or discharge by the pure water tap, and the dense water that reverse osmosis membrane filtration device 9 comes out can only pass through the 3rd switch-valve 16, the directly discharging of first variable valve, 18 backs.
Under normal aqueous mode processed, thermo-bulb 20 and water quality probe 21 can constantly be monitored the made pure water water quality of reverse osmosis membrane filtration device 9, and be better when pure water water quality, and reaches one and prescribe a time limit down, and system can enter the concentrate recirculation pattern.
2, concentrate recirculation pattern
In the concentrate recirculation pattern, first switch-valve 6 is opened, topping-up pump 8 work, the 3rd switch-valve 16 and second switch valve 11 are closed, and the 4th switch-valve 22 is opened, at this moment the dense water that comes out of reverse osmosis membrane filtration device 9 can only be by before turning back to first switch-valve 6 behind the 4th switch-valve 22, the 3rd variable valve 23, first check valve 19, the ultrafiltration membrane filter device 5, and because the effect of topping-up pump 8 repeats to enter reverse osmosis membrane filtration device 9, cause dense water cycle reuse.The operating pressure of reverse osmosis membrane filtration device 9 when the 3rd variable valve 23 can be regulated concentrate recirculation is so that reverse osmosis membrane filtration device 9 constantly produces pure water.
Under the concentrate recirculation pattern, reverse osmosis membrane filtration device 9 made pure water water quality can change, and thermo-bulb 20 and water quality probe 21 monitoring constantly when the pure water change of water quality, and reach one upward in limited time, and system can enter rinse mode.
3, rinse mode
Under rinse mode, first switch-valve 6 is opened, topping-up pump 8 work, and the 3rd switch-valve 16 and second switch valve 11 are opened, and the 4th switch-valve 22 cuts out.This will not produce pressure owing to there is not the crown_interception of first variable valve 18 in reverse osmosis membrane filtration device 9, and at this moment the wash-down water that comes out of reverse osmosis membrane filtration device 9 dense water end (W.E.)s is by the 3rd switch-valve 16, and second switch valve 11 directly discharges.
Work for some time under rinse mode, after 5 seconds, system enters normal aqueous mode processed automatically, and satisfying condition then enters concentrate recirculation pattern and rinse mode again, so moves in circles.
When high-voltage switch gear 12 reaches the operating pressure value, at this moment stored up full pure water in the pressure pot 14, system can enter stop mode.
Open the pure water tap, can obtain the pure water that filters through reverse osmosis membrane filtration device 9.Open clear water faucet, can obtain the water purification that filters through ultrafiltration membrane filter device 5.
Through experimental test, under the condition of ordinary tap water, the tap water comprehensive recovery of the reverse osmosis water purifier of the utility model embodiment has been saved tap water greatly up to 60%, has played water-saving beneficial effect.And guaranteed the work-ing life in 9 two years of reverse osmosis membrane filtration device, also prolonged the duration of service of preposition filtration unit.
Embodiment two
As shown in Figure 3, the structure of the reverse osmosis water purifier among the structure of the reverse osmosis water purifier in the present embodiment and the embodiment one is identical substantially, difference is: the original water inlet of described ultrafiltration membrane filter device 5 is connected on the pipeline between described under meter 7 and described first switch-valve 6, the pure water inlet of described ultrafiltration membrane filter device 5 is communicated with water purification discharging device 24, and the dense water out of described ultrafiltration membrane filter device 5 is connected on the dense water out and the pipeline between described the 3rd switch-valve 16 of described reverse osmosis membrane filtration device 9 through second check valve 25.
Embodiment three
As shown in Figure 4, the structure of the reverse osmosis water purifier among the structure of the reverse osmosis water purifier in the present embodiment and the embodiment two is identical substantially, and difference is: second end of described concentrate recirculation branch road is connected on the pipeline between described first switch-valve 6 and the described topping-up pump 8.
Reverse osmosis water purifier among embodiment two and the embodiment three can reach same water-saving result.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.

Claims (10)

1. reverse osmosis water purifier, comprise preposition filtration unit, topping-up pump, the reverse osmosis membrane filtration device, rearmounted filtration unit, the pure water discharging device, pressure pot and control device, the water-in of described preposition filtration unit is communicated with the tap water outlet, the water outlet of described preposition filtration unit is communicated with the original water inlet of described reverse osmosis membrane filtration device through first switch-valve and described topping-up pump, the pure water outlet of described reverse osmosis membrane filtration device is divided into two-way, one the tunnel is communicated with described pressure pot through high-voltage switch gear, another road is communicated with described pure water discharging device through described rearmounted filtration unit, the dense water out of described reverse osmosis membrane filtration device is communicated with first variable valve mutually arranged side by side and second switch valve, it is characterized in that described reverse osmosis water purifier also comprises
The 3rd switch-valve, it is connected on the dense water out and the pipeline between described first variable valve of described reverse osmosis membrane filtration device;
The concentrate recirculation branch road, it is provided with the 4th switch-valve, first end of described concentrate recirculation branch road is connected on the dense water out and the pipeline between described the 3rd switch-valve of described reverse osmosis membrane filtration device, and second end is connected on the pipeline between described preposition filtration unit and the described topping-up pump;
Water monitoring device is used for the water quality in the pure water exit of the described reverse osmosis membrane filtration device of monitoring in real time, and transfers to described control device;
Described control device is used for controlling according to the monitoring result of water monitoring device the switch of described first switch-valve, described second switch valve, described the 3rd switch-valve and described the 4th switch-valve.
2. reverse osmosis water purifier according to claim 1, it is characterized in that second end of described concentrate recirculation branch road is connected on the pipeline between described preposition filtration unit and described first switch-valve or is connected on the pipeline between described first switch-valve and the described topping-up pump.
3. reverse osmosis water purifier according to claim 1 is characterized in that, also is provided with the 3rd variable valve on described concentrate recirculation branch road, and the 3rd variable valve is arranged at the front side along water (flow) direction of described the 4th switch-valve.
4. reverse osmosis water purifier according to claim 1 is characterized in that, also is provided with first check valve on described concentrate recirculation branch road, and this first check valve is arranged at the front side along water (flow) direction of described the 4th switch-valve.
5. according to any described reverse osmosis water purifier in the claim 1 to 4, it is characterized in that, described reverse osmosis water purifier also comprises ultrafiltration membrane filter device and water purification discharging device, the original water inlet of described ultrafiltration membrane filter device is communicated with second end of described concentrate recirculation branch road, the pure water inlet of described ultrafiltration membrane filter device is communicated with described water purification discharging device, and the dense water out of described ultrafiltration membrane filter device is connected on the pipeline between described preposition filtration unit and described first switch-valve.
6. according to any described reverse osmosis water purifier in the claim 1 to 4, it is characterized in that, described reverse osmosis water purifier also comprises ultrafiltration membrane filter device and water purification discharging device, the original water inlet of described ultrafiltration membrane filter device is connected on the pipeline between described preposition filtration unit and described first switch-valve or is connected on the pipeline between described first switch-valve and the described topping-up pump, the pure water inlet of described ultrafiltration membrane filter device is communicated with described water purification discharging device, and the dense water out of described ultrafiltration membrane filter device is connected on the dense water out and the pipeline between described the 3rd switch-valve of described reverse osmosis membrane filtration device through second check valve.
7. reverse osmosis water purifier according to claim 1 is characterized in that, described water monitoring device comprises water quality probe and thermo-bulb.
8. reverse osmosis water purifier according to claim 1 is characterized in that, described topping-up pump is big flow topping-up pump.
9. reverse osmosis water purifier according to claim 1 is characterized in that, described preposition filtration unit comprises the cotton filter core of the PP that is in series and particle charcoal filter core.
10. reverse osmosis water purifier according to claim 9 is characterized in that, described reverse osmosis water purifier also comprises low-tension switch, and this low-tension switch is connected on the pipeline between the cotton filter core of described PP and the described particle charcoal filter core.
CN 201320051011 2013-01-29 2013-01-29 RO (reverse osmosis) water purifier Expired - Fee Related CN203112610U (en)

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CN103482780A (en) * 2013-10-11 2014-01-01 河北科瑞达仪器科技股份有限公司 System for obtaining purified water in tap water use process
CN103506014A (en) * 2013-09-30 2014-01-15 浙江艾波特环保科技股份有限公司 On-line detecting controller of reverse osmosis water machine
CN103991990A (en) * 2014-06-17 2014-08-20 山东润泰智能电气有限公司 Wastewater-free reverse osmosis water purifier and water production method thereof
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WO2018161453A1 (en) * 2017-03-07 2018-09-13 佛山市顺德区美的饮水机制造有限公司 Water filtration system
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CN103506014A (en) * 2013-09-30 2014-01-15 浙江艾波特环保科技股份有限公司 On-line detecting controller of reverse osmosis water machine
CN103482780B (en) * 2013-10-11 2015-02-25 河北科瑞达仪器科技股份有限公司 System for obtaining purified water in tap water use process
CN103482780A (en) * 2013-10-11 2014-01-01 河北科瑞达仪器科技股份有限公司 System for obtaining purified water in tap water use process
CN104556503B (en) * 2013-10-22 2017-06-06 珠海格力电器股份有限公司 Purifier and water purifier
CN104556503A (en) * 2013-10-22 2015-04-29 珠海格力电器股份有限公司 Water purification device and water purification machine
CN104628172A (en) * 2013-11-06 2015-05-20 珠海格力电器股份有限公司 Water purifier
CN104722207A (en) * 2013-12-24 2015-06-24 珠海格力电器股份有限公司 Water purification system and control method thereof, and water purifier
CN103991990A (en) * 2014-06-17 2014-08-20 山东润泰智能电气有限公司 Wastewater-free reverse osmosis water purifier and water production method thereof
CN104950092A (en) * 2014-06-19 2015-09-30 佛山市云米电器科技有限公司 Water purifying device and work method thereof
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