CN102705537A - Multipurpose electromagnetic valve and water purifier system consisting of same - Google Patents
Multipurpose electromagnetic valve and water purifier system consisting of same Download PDFInfo
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- CN102705537A CN102705537A CN2012101815570A CN201210181557A CN102705537A CN 102705537 A CN102705537 A CN 102705537A CN 2012101815570 A CN2012101815570 A CN 2012101815570A CN 201210181557 A CN201210181557 A CN 201210181557A CN 102705537 A CN102705537 A CN 102705537A
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Abstract
The invention discloses a multipurpose electromagnetic valve, which comprises a valve seat and a valve seat sealing cover hermetically connected with the valve seat. The valve seat is provided with a flushing water discharge inlet, a concentrate water discharge opening and a flushing recirculation water opening; a water inlet cavity communicated with the flushing water discharge inlet and a flushing recirculation flow passage communicated with the flushing recirculation water opening are arranged in the valve seat; and the valve seat and the valve seat sealing cover form a concentrate water outlet cavity communicated with the concentrate water discharge opening. The flushing recirculation flow passage and the concentrate water outlet cavity are both communicated with the water inlet cavity, and a water sealing assembly controlling a waterway between the water inlet cavity and the flushing recirculation flow passage to be switched in an on state and an off state is arranged on the waterway of the water inlet cavity, which is communicated with the flushing recirculation flow passage. The invention also discloses a water purifier system consisting of the multipurpose electromagnetic valve; when the multipurpose electromagnetic valve adopting the above structure is applied to the water purifier system and when a reverse osmosis filtration assembly is flushed, flushing water can be utilized circularly, and water resources are saved.
Description
Technical field
The present invention relates to a kind of water treatment system of cut off the water supply equipment and formation thereof, specifically is many pure water machine systems with solenoid valve and formation thereof.
Background technique
Pure water machine system dense water in system water process is discharged from the dense water out of reverse osmosis filter group; Because of usually subsidiary impurity in the dense water; Partial impurities can rest in the reverse osmosis filter group; In pure water machine system system water process repeatedly, the impurity that rests in the reverse osmosis filter group can get more and more, and this will have influence on the water purification quality that pure water machine system is made.Pure for the water quality that guarantees the water that pure water machine system is made, people usually wash the reverse osmosis filter group of family expenses pure water system, and then avoid impurity in reverse osmosis filter group, to deposit.Existing pure water machine system is when washing reverse osmosis filter group, and sparge water directly emits, and this has just caused the waste of great lot of water resources.
Summary of the invention
The objective of the invention is to overcome the deficiency of existing technology; Provide when being applied on the pure water machine system;, the reverse osmosis filter group of pure water machine system can sparge water directly be back in the pure water machine system water making pipe road when being washed; And then sparge water recycled and can sparge water be used to make the solenoid valves of using that the water water route is controlled more, the present invention also provides above-mentioned many pure water machine systems that constitutes with solenoid valve.
The object of the invention is mainly realized through following technological scheme: use solenoid valve more; Comprise valve seat and the valve seat capping that is connected with valve base sealing; Valve seat is provided with towards drain inlet, concentrated water drainage mouth and the flushing backflow mouth of a river; Be provided with connection in the valve seat towards the water-inlet cavity of drain inlet and the flushing backflow runner at the connection flushing backflow mouth of a river; Valve seat and valve seat capping constitute the dense water water chamber of connecting the concentrated water drainage mouth, and said flushing backflow runner and dense water water chamber are all connected with water-inlet cavity, and the water route that water-inlet cavity and flushing backflow runner are connected is provided with the water shutoff assembly that change in the water route between control water-inlet cavity and the flushing backflow runner under the switching two states.
Said valve seat constitutes the pressure release water shutoff mouth two of connecting water-inlet cavity and dense water water chamber; Be provided with pressure release spring two and pressure release envelope seat two in the said dense water water chamber; Pressure release envelope seat two sealing pressure release water shutoff mouths two; The two ends of pressure release spring two act on valve seat capping inner top and pressure release envelope seat two respectively, and pressure release spring two and pressure release envelope seat two constitute the pressure release assembly two that change in the water route between control water-inlet cavity and the dense water water chamber under the switching two states; Said valve seat is connected with the choked flow bar, constitutes the choked flow runner of connecting water-inlet cavity and dense water water chamber between valve seat and the choked flow bar.More existing valve bodies also build the pressure through the choked flow runner is set, but damage for fear of the valve body inner assembly, and its choked flow runner operated by rotary motion is bigger, and the water route that therefore need be connected with this valve body provides enough big pressure.The present invention is when being provided with; The choked flow runner can be set to enough little; Pressure release assembly two auxiliary choked flow runners are controlled the effect that builds the pressure in the water-inlet cavity; The interior hydraulic pressure of two pairs of water-inlet cavitys of pressure release assembly carries out the hydraulic pressure value of pressure release can be regulated and control through regulating pressure release spring two, because of the pressure release assembly has the function of hydraulic pressure in the water-inlet cavity being carried out pressure release, how can not damage because of hydraulic pressure is excessive in the basin, place with solenoid valve inner assembly and preposition associated component thereof.
Said valve seat is connected with pressure release water shutoff plate; Pressure release water shutoff plate constitutes the pressure release water shutoff mouth one of connecting flushing backflow runner and dense water water chamber; Be provided with pressure release envelope seat one and pressure release spring one in the said dense water water chamber; Pressure release envelope seat one sealing pressure release water shutoff mouth one; Pressure release spring one two ends act on valve seat capping inner top and pressure release envelope seat one respectively, and pressure release envelope seat one and pressure release spring one constitute the pressure release assembly one that change in the water route between the control flushing backflow mouth of a river and the dense water water chamber under the switching two states.
Said valve seat is connected at water-inlet cavity and is constituted unidirectional mouthful of flushing on the water route of washing the backflow runner, and valve seat is connected with controlled water flow from washing unidirectional mouthful to the flushing one-way valve that washes the one-way flow of backflow runner.
Above-mentioned many pure water machine systems that constitutes with solenoid valve; Comprise in order raw water tubes, one-level filter group, secondary filter group, three grades of filter groups, superchargings of connecting cut off the water supply pump, reverse osmosis filter group, one-way valve, rearmounted carbon filter group and clear water faucet; Be connected with water butt and high-voltage switch gear on the pipeline between said one-way valve and the rearmounted carbon filter group; Be provided with water-purifying cavity in the said water butt; The pipeline between one-way valve and the rearmounted carbon filter group and the water-purifying cavity of water butt are connected, and said reverse osmosis filter group is provided with pure water inlet and dense water out, and pure water inlet is connected with one-way valve; Said pure water machine system also comprises many solenoid valves of use, and said many drain inlet of dashing with solenoid valve are connected with the dense water out of reverse osmosis filter group, the flushing backflow mouth of a river and the supercharging pump of the pump assembly preceding water route connection of cutting off the water supply of cutting off the water supply.
During the pure water machine system system water that how constitutes with solenoid valve; The closed electromagnetic valves of using more; Dense water gets in many water-inlet cavitys with solenoid valve through the dense water out of reverse osmosis filter group; Water route between water shutoff assembly blocking-up water-inlet cavity and the flushing backflow runner, dense water gets in the dense water water chamber through the choked flow runner, discharges through the concentrated water drainage mouth again; If get into the dense dilutional hyponatremia in the water-inlet cavity; The interior hydraulic pressure of water-inlet cavity this moment overcomes the active force of pressure release spring two; Pressure release end socket seat two no longer seals pressure release water shutoff mouth two, and dense water gets in the dense water water chamber from pressure release water shutoff mouth two in the water-inlet cavity, and then discharges through the concentrated water drainage mouth.When the reverse osmosis filter group of pure water machine system is washed; How to open with solenoid valve; Water route between water-inlet cavity and the flushing backflow runner is connected; The sparge water that gets into water-inlet cavity gets in the flushing backflow runner through the flushing one-way valve, and the cut off the water supply pump of pump of the supercharging that gets into pure water machine system through the flushing backflow mouth of a river is again cut off the water supply on the preceding water route of assembly.When pure water machine system is in outage state at system water process and pure water machine system; The preceding water route of pump pump hydraulic pressure is too high if supercharging is cut off the water supply; Partial raw water gets in the flushing backflow runner through the flushing backflow mouth of a river; Hydraulic pressure increases in the flushing backflow runner, and hydraulic pressure overcomes the active force of a pair of pressure release end socket of pressure release spring seat one in the dense water water chamber in the flushing backflow runner, and flushing backflow runner and dense water water chamber are connected; This moment, former water was discharged through the concentrated water drainage mouth, and then can carry out the pressure-bearing protection to the associated component on the system water water route.
Compared with prior art; The present invention has following beneficial effect: (1) many valve seats with solenoid valve of the present invention are provided with towards drain inlet, concentrated water drainage mouth and the flushing backflow mouth of a river, are provided with connection in the valve seat towards the water-inlet cavity of drain inlet and the flushing backflow runner at the connection flushing backflow mouth of a river, and valve seat and valve seat capping constitute the dense water water chamber of connecting the concentrated water drainage mouth; Of the present invention many when being applied to pure water machine system with solenoid valve; Be connected towards the dense water out of drain inlet with reverse osmosis filter group, flushing the backflow mouth of a river and the supercharging pump of the pump assembly preceding water route connection of cutting off the water supply of cutting off the water supply is when washing reverse osmosis filter group; Can be through opening the solenoid valves of using more; Make sparge water enter the cut off the water supply pump of pump of supercharging and cut off the water supply on the system water water route before the assembly, and then can carry out recycle, save water resources sparge water through the flushing backflow mouth of a river; Sparge water reusable edible among the present invention, and then when reverse osmosis filter group is washed, can prolong washing time, and then guarantee rinsing quality.
(2) valve seat of the present invention constitutes the pressure release water shutoff mouth two of connecting water-inlet cavity and dense water water chamber; Pressure release spring two constitutes the pressure release assembly two whether control pressure release water shutoff mouth two connects water-inlet cavity and dense water water chamber with pressure release envelope seat two; Valve seat is connected with the choked flow bar; Constitute the choked flow runner of connecting water-inlet cavity and dense water water chamber between valve seat and the choked flow bar; The present invention only is provided with on the basis that the choked flow runner builds the pressure to hydraulic pressure in it at more existing valve bodies increases pressure release assembly two, and pressure release assembly two auxiliary choked flow runners carry out earial drainage to dense water, and choked flow runner of the present invention can be set to enough little; And then can improve the effect that builds the pressure, the present invention can avoid in the water-inlet cavity hydraulic pressure excessive and cause how impaired with solenoid valve inner assembly and preposition associated component thereof under the effect of pressure release assembly two.
(3) pressure release envelope seat one of the present invention and pressure release spring one constitute the pressure release assembly one that change in the water route between the control flushing backflow mouth of a river and the dense water water chamber under the switching two states; The present invention can carry out pressure release through the cut off the water supply preceding water route of pump of pump of a pair of supercharging of pressure release assembly, and then avoids pure water machine system to damage because of hydraulic pressure is too high.
Description of drawings
Fig. 1 uses the structural representation of solenoid valve more for the present invention;
Fig. 2 is the structural representation of first kind of mode of execution of pure water machine system of the present invention.
The pairing name of reference character is called in the accompanying drawing: 101-raw water tubes, 102-water butt, 103-one-level filter group, 104-secondary filter group, 105-three grades of filter groups, 106-supercharging pump of cutting off the water supply; 107-concentrated water drainage pipe, 108-flushing backflow mouth of a river, 109-use solenoid valve, 110-reverse osmosis filter group, 111-one-way valve more; 112-high-voltage switch gear, 113-rearmounted carbon filter group, 114-clear water faucet, 201-towards drain inlet, 202-water-inlet cavity; 203-water shutoff assembly, 204-electrically-controlled component, 205-valve seat, 206-concentrated stream road, 207-concentrated water drainage mouth; 208-choked flow runner, 209-choked flow bar, 210-flushing one-way valve, 211-flushing backflow runner, 212-pressure release water shutoff plate; 213-pressure release water shutoff mouth, one, 214-pressure release envelope seat, one, 215-pressure release spring, one, 216-seal ring, the capping of 217-valve seat; Unidirectional mouthful of 218-pressure release spring, two, 219-pressure release envelope seat, two, 220-pressure release water shutoff mouth, two, 221-flushing, 222-water shutoff mouth.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is done further detailed description, but mode of execution of the present invention is not limited thereto.
Embodiment 1:
As shown in Figure 1; The solenoid valves of using more; Comprise valve seat 205 and the valve seat capping 217 that is tightly connected with valve seat 205; Valve seat 205 is provided with towards drain inlet 201, concentrated water drainage mouth 207 and the flushing backflow mouth of a river 108, and concentrated water drainage mouth 207 is connected with concentrated water drainage pipe 107, is provided with connection in the valve seat 205 towards the water-inlet cavity 202 of drain inlet 201 and the flushing backflow runner 211 at the connection flushing backflow mouth of a river 108; Valve seat 205 constitutes dense water water chamber with valve seat capping 217, and dense water water chamber is connected with concentrated water drainage mouth 207 through the concentrated stream road 206 that valve seat 205 constitutes.Flushing backflow runner 211 is all connected with water-inlet cavity 202 with dense water water chamber, and the water route that water-inlet cavity 202 and flushing backflow runner 211 are connected is provided with the water shutoff assembly 203 that change in the water route between control water-inlet cavity 202 and the flushing backflow runner 211 under the switching two states.Valve seat 205 constitutes water shutoff mouth 222 on the water route of connecting water-inlet cavity 202 and flushing backflow runner 211; Water shutoff assembly 203 connects with valve seat 205 and is corresponding with water shutoff mouth 222 positions, and valve seat 205 is connected with the electrically-controlled component 204 of control water shutoff assembly 203 sealing water shutoff mouths 222.
As shown in Figure 2; Many pure water machine systems that constitute with solenoid valve; Comprise in order the raw water tubes 101 that connects, one-level filter group 103, secondary filter group 104, three grades of filter groups 105, superchargings cut off the water supply pump 106, reverse osmosis filter group 110, one-way valve 111, rearmounted carbon filter group 113 and clear water faucet 114; Wherein, be connected with water butt 102 and high-voltage switch gear 112 on the pipeline between one-way valve 111 and the rearmounted carbon filter group 113.Be provided with water-purifying cavity in the water butt 102, the pipeline between one-way valve 111 and the rearmounted carbon filter group 113 and the water-purifying cavity of water butt 102 are connected, and reverse osmosis filter group 110 is provided with pure water inlet and dense water out, and pure water inlet is connected with one-way valve 111.Pure water machine system also comprises many with solenoid valve 109, and wherein, how the drain inlet 201 of dashing with solenoid valve 109 is connected with the dense water out of reverse osmosis filter group 110, washes the backflow mouth of a river 108 and the supercharging pump of the pump 106 assembly preceding water route connection of cutting off the water supply of cutting off the water supply.
Embodiment 2:
Present embodiment has increased following structure on embodiment 1 basis: valve seat 205 constitutes the pressure release water shutoff mouth 2 220 of connecting water-inlet cavity 202 and dense water water chamber; Be provided with pressure release spring 2 218 and pressure release envelope seat 2 219 in the dense water water chamber; Pressure release envelope seat 2 219 sealing pressure release water shutoff mouths 2 220; The two ends of pressure release spring 2 218 act on valve seat capping 217 inner tops and pressure release envelope seat 2 219 respectively, and pressure release spring 2 218 and pressure release envelope seat 2 219 constitute the pressure release assembly two that change in the water route between control water-inlet cavity 202 and the dense water water chamber under the switching two states.Valve seat 205 is connected with choked flow bar 209, constitutes the choked flow runner 208 of connecting water-inlet cavity 202 and dense water water chamber between valve seat 205 and the choked flow bar 209, and choked flow runner 208 should guarantee normally to make when being provided with has the process that builds the pressure in the water-inlet cavity 202 in the water process.
Embodiment 3:
Present embodiment has increased following structure on embodiment 1 or embodiment's 2 basis: valve seat 205 is connected with pressure release water shutoff plate 212; Be provided with seal ring 216 between valve seat 205 and the pressure release water shutoff plate 212; Pressure release water shutoff plate 212 constitutes the pressure release water shutoff mouth 1 of connecting flushing backflow runner 211 and dense water water chamber; Be provided with pressure release envelope seat 1 and pressure release spring 1 in the dense water water chamber; Pressure release envelope seat one 215 sealing pressure release water shutoff mouths 1; Pressure release spring one 215 two ends act on valve seat capping 217 inner tops and pressure release envelope seat 1 respectively, and pressure release envelope seat 1 and pressure release spring 1 constitute the pressure release assembly one that change in the water route between the control flushing backflow mouth of a river 108 and the dense water water chamber under the switching two states.Valve seat 205 is connected at water-inlet cavity 202 and is constituted unidirectional mouthful 221 of flushing on the water route of washing backflow runner 211, and valve seat 205 is connected with controlled water flow from washing the unidirectional mouthful 221 flushing one-way valve 210 to 221 one-way flows of flushing backflow runner.
As stated, then can well realize the present invention.
Claims (5)
1. use solenoid valve more; It is characterized in that: comprise valve seat (205) and the valve seat capping (217) that is tightly connected with valve seat (205); Valve seat (205) is provided with towards drain inlet (201), concentrated water drainage mouth (207) and the flushing backflow mouth of a river (108); Be provided with connection in the valve seat (205) towards the water-inlet cavity (202) of drain inlet (201) and the flushing backflow runner (211) at the connection flushing backflow mouth of a river (108); Valve seat (205) constitutes the dense water water chamber of connecting concentrated water drainage mouth (207) with valve seat capping (217); Said flushing backflow runner (211) and dense water water chamber are all connected with water-inlet cavity (202), and the water route that water-inlet cavity (202) and flushing backflow runner (211) are connected is provided with the water shutoff assembly (203) that change in the water route between control water-inlet cavity (202) and the flushing backflow runner (211) under the switching two states.
2. the solenoid valve of using according to claim 1 more; It is characterized in that: said valve seat (205) constitutes the pressure release water shutoff mouth two (220) of connecting water-inlet cavity (202) and dense water water chamber; Be provided with pressure release spring two (218) and pressure release envelope seat two (219) in the said dense water water chamber; Pressure release envelope seat two (219) sealing pressure release water shutoff mouths two (220); The two ends of pressure release spring two (218) act on valve seat capping (217) inner top and pressure release envelope seat two (219) respectively, and pressure release spring two (218) and pressure release envelope seat two (219) constitute the pressure release assembly two that change in the water route between control water-inlet cavity (202) and the dense water water chamber under the switching two states; Said valve seat (205) is connected with choked flow bar (209), constitutes the choked flow runner (208) of connecting water-inlet cavity (202) and dense water water chamber between valve seat (205) and the choked flow bar (209).
3. the solenoid valve of using according to claim 1 more; It is characterized in that: said valve seat (205) is connected with pressure release water shutoff plate (212); Pressure release water shutoff plate (212) constitutes the pressure release water shutoff mouth one (213) of connecting flushing backflow runner (211) and dense water water chamber; Be provided with pressure release envelope seat one (214) and pressure release spring one (215) in the said dense water water chamber; Pressure release envelope seat one (215) sealing pressure release water shutoff mouth one (213); Pressure release spring one (215) two ends act on valve seat capping (217) inner top and pressure release envelope seat one (214) respectively, and pressure release envelope seat one (214) and pressure release spring one (215) constitute the pressure release assembly one that change in the water route between the control flushing backflow mouth of a river (108) and the dense water water chamber under the switching two states.
4. the solenoid valve of using according to claim 1 more; It is characterized in that: said valve seat (205) is connected at water-inlet cavity (202) and is constituted unidirectional mouthful of flushing (221) on the water route of washing backflow runner (211), and valve seat (205) is connected with controlled water flow from washing unidirectional mouthful (221) to the flushing one-way valve (210) that washes backflow runner (221) one-way flow.
5. each described many pure water machine systems that constitute with solenoid valve of claim 1～4; It is characterized in that: comprise in order the raw water tubes (101), one-level filter group (103), secondary filter group (104), three grades of filter groups (105), the supercharging that connect cut off the water supply pump (106), reverse osmosis filter group (110), one-way valve (111), rearmounted carbon filter group (113) and clear water faucet (114); Be connected with water butt (102) and high-voltage switch gear (112) on the pipeline between said one-way valve (111) and the rearmounted carbon filter group (113); Said water butt is provided with water-purifying cavity in (102); The pipeline between one-way valve (111) and the rearmounted carbon filter group (113) and the water-purifying cavity of water butt (102) are connected; Said reverse osmosis filter group (110) is provided with pure water inlet and dense water out, and pure water inlet is connected with one-way valve (111); Said pure water machine system also comprises many with solenoid valve (109); Said many drain inlet (201) of dashing with solenoid valve (109) are connected with the dense water out of reverse osmosis filter group (110), wash the backflow mouth of a river (108) and the supercharging pump of pump (106) the assembly preceding water route connection of cutting off the water supply of cutting off the water supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210181557.0A CN102705537B (en) | 2012-06-05 | 2012-06-05 | Multipurpose electromagnetic valve and water purifier system consisting of same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210181557.0A CN102705537B (en) | 2012-06-05 | 2012-06-05 | Multipurpose electromagnetic valve and water purifier system consisting of same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102705537A true CN102705537A (en) | 2012-10-03 |
| CN102705537B CN102705537B (en) | 2014-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210181557.0A Expired - Fee Related CN102705537B (en) | 2012-06-05 | 2012-06-05 | Multipurpose electromagnetic valve and water purifier system consisting of same |
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| Country | Link |
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| CN (1) | CN102705537B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103721568A (en) * | 2014-01-07 | 2014-04-16 | 深圳市英尼克电器有限公司 | Dual-cycle reverse osmosis device and reverse osmosis treatment method |
| CN110589997A (en) * | 2019-09-09 | 2019-12-20 | 浙江沁园水处理科技有限公司 | Water purification system with reversing valve |
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| JPH09264441A (en) * | 1996-03-28 | 1997-10-07 | Toray Ind Inc | Directional control valve and water purifier |
| WO2008008465A2 (en) * | 2006-07-14 | 2008-01-17 | Entegris, Inc. | Valve manifold assembly |
| CN201028052Y (en) * | 2007-03-23 | 2008-02-27 | 刘文庆 | Electromagnetic valve |
| CN201944333U (en) * | 2011-03-29 | 2011-08-24 | 吴瑞昌 | Three-way valve |
| CN202580135U (en) * | 2012-06-05 | 2012-12-05 | 吴瑞昌 | Multipurpose electromagnetic valve and water purifier system comprising same |
-
2012
- 2012-06-05 CN CN201210181557.0A patent/CN102705537B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09264441A (en) * | 1996-03-28 | 1997-10-07 | Toray Ind Inc | Directional control valve and water purifier |
| WO2008008465A2 (en) * | 2006-07-14 | 2008-01-17 | Entegris, Inc. | Valve manifold assembly |
| CN201028052Y (en) * | 2007-03-23 | 2008-02-27 | 刘文庆 | Electromagnetic valve |
| CN201944333U (en) * | 2011-03-29 | 2011-08-24 | 吴瑞昌 | Three-way valve |
| CN202580135U (en) * | 2012-06-05 | 2012-12-05 | 吴瑞昌 | Multipurpose electromagnetic valve and water purifier system comprising same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103721568A (en) * | 2014-01-07 | 2014-04-16 | 深圳市英尼克电器有限公司 | Dual-cycle reverse osmosis device and reverse osmosis treatment method |
| CN103721568B (en) * | 2014-01-07 | 2016-05-11 | 深圳市英尼克电器有限公司 | Two circulation reverse osmosis units and reverse osmosis treatent method |
| CN110589997A (en) * | 2019-09-09 | 2019-12-20 | 浙江沁园水处理科技有限公司 | Water purification system with reversing valve |
| CN110589997B (en) * | 2019-09-09 | 2024-06-11 | 浙江沁园水处理科技有限公司 | Water purification system with reversing valve |
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| CN102705537B (en) | 2014-02-12 |
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Granted publication date: 20140212 Termination date: 20140605 |