CN108975542B - Water purification system and water purifier - Google Patents
Water purification system and water purifier Download PDFInfo
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- CN108975542B CN108975542B CN201810973024.3A CN201810973024A CN108975542B CN 108975542 B CN108975542 B CN 108975542B CN 201810973024 A CN201810973024 A CN 201810973024A CN 108975542 B CN108975542 B CN 108975542B
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- water
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- state
- purification system
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Abstract
The invention provides a water purification system and a water purifier, wherein the water purification system comprises: the composite filter element comprises a shell, a preposed filter element and a postposed filter element, wherein the shell is provided with a preposed water inlet, a preposed water outlet, a postposed water inlet and a postposed water outlet, the reverse osmosis filter element is provided with a purified water inlet communicated with the preposed water outlet, a purified water outlet communicated with the postposed water inlet and a concentrated water outlet, the water purification system further comprises a concentrated water treatment unit, the concentrated water treatment unit is provided with a concentrated water inlet and a concentrated water outlet communicated with the concentrated water outlet so as to treat concentrated water discharged from the reverse osmosis filter element and slow down concentration polarization, the concentrated water outlet is connected with a plurality of pipelines, a circulating flushing flow path and a pulse flushing flow path are formed in the pipelines, the circulating flushing flow path is in a cut-off state when the pulse flushing flow path is in a circulating state, and the circulating flushing flow path is in a circulating state when the pulse flushing flow path is in a cut-off state. The invention has simple control and can slow down the concentration polarization of the RO membrane surface.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a water purifying system and a water purifier.
Background
At present, the water purifier has the problems of large volume, more filter elements, high core replacement frequency, high cost, more waterway joints and the like. In order to reduce the volume of the water purifier, a filter element is generally synthesized by pretreated PP cotton and activated carbon or carbon rods, so that the number of the filter elements is reduced. But the occupied volume of the water purifier is larger.
In order to further reduce the occupied volume of the water purifier, the prior art provides a water purifying system, the water purifying system comprises a composite filter element and an RO membrane filter element, the composite filter element comprises a shell, a front filter element and a rear filter element which are arranged in the shell and are mutually independent in a filtering channel, the shell is provided with a front water inlet, a front water outlet, a rear water inlet and a rear water outlet, the RO membrane filter element is provided with a water inlet communicated with the front water outlet, a water outlet communicated with the rear water inlet and a wastewater outlet communicated with a wastewater pipe, the wastewater outlet is connected with the wastewater pipe, a return pipe is connected to the side of the wastewater pipe, one end of the return pipe, which is far away from the wastewater pipe, is connected to a pipeline between the front filter element and the RO membrane filter element, a wastewater control valve is arranged on the wastewater pipe, the opening of the wastewater control valve and the return control valve are adjustable, and circulating flushing and pulse flushing are realized by adjusting the opening of the two control valves, so that the control is complicated; and the concentrated water discharged from the RO membrane filter core is not further treated, and concentration polarization can also occur on the surface of the RO membrane filter core. Therefore, there is an urgent need for a water purification system that is easy to control and slows down concentration polarization.
Disclosure of Invention
The invention mainly aims to provide a water purification system and a water purifier, which are used for solving the problems that in the prior art, the control is complicated due to the fact that the cyclic flushing and the pulse flushing are realized by adjusting the opening of two control valves, and concentration polarization can occur on the surface of an RO membrane filter core due to the fact that concentrated water discharged from the RO membrane filter core is not further treated.
To achieve the above object, the present invention provides a water purification system comprising: the composite filter element comprises a shell, a front filter element and a rear filter element, wherein the front filter element and the rear filter element are arranged in the shell, the filter channels are mutually independent, the shell is provided with a front water inlet, a front water outlet, a rear water inlet and a rear water outlet, the reverse osmosis filter element is provided with a pure water inlet communicated with the front water outlet, a pure water outlet communicated with the rear water inlet and a concentrated water outlet, the water purification system further comprises a concentrated water treatment unit, the concentrated water treatment unit is provided with a concentrated water inlet and a concentrated water outlet communicated with the concentrated water outlet, so that concentrated water discharged from the reverse osmosis filter element is treated and slowed down, the concentrated water outlet is connected with a plurality of pipelines, a circulating flushing flow path which is communicated with the concentrated water outlet and the pure water inlet and a pulse flushing flow path which can be cut off are formed in the pipelines, wherein when the pulse flushing flow path is in a circulation state, the circulating flushing flow path is in a circulation state when the pulse flushing flow path is in a cut-off state, and circulating flushing and pulse flushing can be realized through the circulation flushing flow stop of the pulse flushing flow path.
Further, the water purification system further comprises a water purification outlet, and the water purification outlet is communicated with the front water outlet so that purified water can flow out from the water purification outlet.
Further, the water purifying system also comprises a water purifying pipeline, wherein the water inlet end of the water purifying pipeline is communicated with the front water outlet, and the water outlet end of the water purifying pipeline forms a water purifying water outlet.
Further, the circulation flushing flow path and the pulse flushing flow path alternately operate.
Further, the concentrated water treatment unit is an ultrafiltration filter element, a softening filter element or a nanofiltration filter element.
Further, the concentrated water treatment unit is connected with the concentrated water outlet through an intermediate pipeline.
Further, a first concentrated water flow path for discharging the concentrated water and throttling the concentrated water, a second concentrated water flow path capable of flowing and stopping and throttling the concentrated water and a backwater flow path for communicating a concentrated water outlet with a purified water inlet and throttling the concentrated water are formed in the pipelines, wherein when the second concentrated water flow path is in a flowing state, the first concentrated water flow path is in a flowing state, and the backwater flow path is in a stopping state; when the second concentrated water flow path is in a cut-off state, the first concentrated water flow path and the backwater flow path are in a circulation state, so that the partial discharge, the partial reflux and the full discharge of the concentrated water are realized through the circulation cut-off of the second concentrated water flow path during water preparation.
Further, when the second concentrated water flow path is in a circulation state, the water purifying system is in a first water making state, and when the second concentrated water flow path is in a cut-off state, the water purifying system is in a second water making state, and the first water making state and the second water making state are operated alternately.
Further, the plurality of pipelines include coupling portion, the return line, first dense water pipeline and second dense water pipeline, coupling portion's inlet end and dense water export intercommunication and its play water end all are connected with the inlet end of return line, the inlet end of second dense water pipeline, the inlet end of first dense water pipeline and dense water export intercommunication, coupling portion has throttle state and full open state, be equipped with the unidirectional component that only allows dense water to flow to the water purification water inlet direction on the return line, be equipped with throttle component on the first dense water pipeline, be equipped with switch unit on the second dense water pipeline.
Further, the connecting part is a connecting pipeline, and the connecting pipeline is provided with a waste water ratio electromagnetic valve.
Further, the connecting portion comprises a first pipeline and a second pipeline which are arranged in parallel, the first pipeline is provided with a waste water ratio, and the second pipeline is provided with an electromagnetic valve.
The invention also provides a water purifier, comprising: the device comprises a machine body and a water purifying system arranged on the machine body, wherein the water purifying system is the water purifying system.
The technical scheme of the invention has the following advantages: when the pulse flushing flow path is in a cut-off state during flushing, the circulating flushing flow path is in a circulation state, and water flowing out of the concentrated water outlet is returned to the purified water inlet through the circulating flushing flow path to form high-speed circulating flow of water flow, so that the reverse osmosis membrane is effectively flushed; when the pulse flushing flow path is in a circulation state, the circulating flushing flow path is in a cut-off state, water flowing out of the concentrated water outlet is discharged through the pulse flushing flow path, thus realizing circulating flushing and pulse flushing by adjusting the circulation cut-off of one flow path, being simple and convenient to control and simplifying the control process. The concentrated water discharged from the reverse osmosis filter element is further treated by the concentrated water treatment unit during water preparation, so that the concentration polarization on the surface of the RO membrane is slowed down, the RO membrane can be better protected, and the service life of the RO membrane is prolonged. And the front filter element and the rear filter element are combined into one filter element, the filter elements are integrated, the number of the filter elements is reduced, a water purifying system is simplified, and the size of the water purifier is miniaturized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art. In the drawings:
fig. 1 shows a schematic view of an embodiment of a water purification system according to the present invention;
fig. 2 shows a schematic diagram of a second embodiment of a water purification system according to the present invention;
fig. 3 shows a schematic view of an embodiment three of a water purification system according to the present invention;
fig. 4 shows a schematic view of an embodiment four of a water purification system according to the present invention;
fig. 5 shows a schematic view of a fifth embodiment of the water purification system according to the present invention;
fig. 6 shows a schematic view of an embodiment six of the water purification system according to the present invention.
Wherein, the reference numerals in the drawings are as follows:
10. a composite filter element; 20. a reverse osmosis filter element; 31. a water inlet pipeline; 32. a water outlet pipeline; 33. a pure water pipeline; 35. a water purifying pipeline; 36. a bypass line; 41. a first concentrate line; 42. a second concentrate line; 43. a return line; 44. a connecting pipeline; 45. a first pipeline; 46. a second pipeline; 49. an intermediate pipeline; 51. a water inlet electromagnetic valve; 52. a voltage stabilizing part; 53. a one-way valve; 54. a flow meter; 55. a high voltage switch; 56. a pressure water storage part; 57. a waste water ratio electromagnetic valve; 58. a TDS probe; 61. a flow rate detection unit; 62. a water quality detection unit; 71. a throttle member; 72. a unidirectional member; 73. a switching part; 74. waste water ratio; 75. an electromagnetic valve; 80. and a concentrated water treatment unit.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, the water purification system of the present embodiment includes: the composite filter element 10 and the reverse osmosis filter element 20, the composite filter element 10 comprises a shell, and a front filter element and a rear filter element which are arranged in the shell and have mutually independent filtering channels, the shell is provided with a front water inlet, a front water outlet, a rear water inlet and a rear water outlet, the reverse osmosis filter element 20 is provided with a pure water inlet communicated with the front water outlet, a pure water outlet communicated with the rear water inlet and a concentrated water outlet, the water purification system further comprises a concentrated water treatment unit 80, the concentrated water treatment unit 80 is provided with a concentrated water inlet and a concentrated water outlet communicated with the concentrated water outlet, so as to treat the concentrated water discharged from the reverse osmosis filter element 20 to slow down concentration polarization, the concentrated water outlet is connected with a plurality of pipelines, a circulating flushing flow path which is communicated with the concentrated water outlet and the pure water inlet and a pulse flushing flow path which can be cut off are formed in the pipelines, wherein when the pulse flushing flow path is in a circulation state, the circulating flushing flow path is in a cut-off state, and when the pulse flushing flow path is in a cut-off state, the circulating flushing flow path is in a circulation state, so that circulation flushing and pulse flushing are realized through the circulation of the pulse flushing flow path.
When the water purification system is used for flushing, when the pulse flushing flow path is in a cut-off state, the circulating flushing flow path is in a circulation state, and water flowing out of the concentrated water outlet is returned to the purified water inlet through the circulating flushing flow path to form high-speed circulating flow of water flow, so that the reverse osmosis membrane is effectively flushed; when the pulse flushing flow path is in a circulation state, the circulating flushing flow path is in a cut-off state, water flowing out of the concentrated water outlet is discharged through the pulse flushing flow path, thus realizing circulating flushing and pulse flushing by adjusting the circulation cut-off of one flow path, being simple and convenient to control and simplifying the control process. The concentrated water discharged from the reverse osmosis filter element 20 during water preparation is further processed by the concentrated water treatment unit 80, so that the concentration polarization on the surface of the RO membrane is slowed down, the RO membrane can be better protected, and the service life of the RO membrane is prolonged. And the front filter element and the rear filter element are combined into one filter element, the filter elements are integrated, the number of the filter elements is reduced, a water purifying system is simplified, and the size of the water purifier is miniaturized.
In this embodiment, the water purification system further includes a purified water outlet, and the purified water outlet is communicated with the front water outlet so that purified water can flow out from the purified water outlet. When a user uses purified water, the purified water flows out from the front water outlet and the purified water outlet in sequence after the raw water is filtered by the front filter element for the user to use; when the user uses pure water, raw water flows out from the rear water outlet after being filtered by the front filter element, the reverse osmosis filter element 20 and the rear filter element in sequence for the user to use. The water purification system has two functions of water outlet and pure water outlet, and meets the use requirements of users.
In this embodiment, the water purification system further includes a water purification pipeline 35, where the water inlet end of the water purification pipeline 35 is communicated with the front water outlet and the water outlet end thereof forms a water purification water outlet, so that the front water outlet and the water purification water outlet can be conveniently connected.
In this embodiment, the circulation flushing flow path and the pulse flushing flow path alternately operate. The pulse flushing flow path not only can discharge dirt after flushing the circulating flushing flow path, but also can realize pulse flushing of the reverse osmosis membrane.
In this embodiment, the concentrate treatment unit 80 is an ultrafiltration cartridge, a softening cartridge, or a nanofiltration cartridge. Specifically, the ultrafiltration filter element is an ultrafiltration filter element which can resist compression.
In this embodiment, the concentrated water treatment unit 80 is connected to the concentrated water outlet through the intermediate pipeline 49, and the connection is simple.
In this embodiment, a first concentrated water flow path for discharging concentrated water and throttling the concentrated water, a second concentrated water flow path capable of flowing and stopping and throttling the concentrated water and a return water flow path for communicating a concentrated water outlet with a purified water inlet and throttling the concentrated water are further formed in the multiple pipelines, wherein when the second concentrated water flow path is in a flowing state, the first concentrated water flow path is in a flowing state, and the return water flow path is in a stopping state; when the second concentrated water flow path is in a cut-off state, the first concentrated water flow path and the backwater flow path are in a circulation state, so that the partial discharge, the partial reflux and the full discharge of the concentrated water are realized through the circulation cut-off of the second concentrated water flow path during water preparation. When water is produced, the first concentrated water flow path is always in a circulation state, and when the second concentrated water flow path is in a circulation state, the backwater flow path is in a cut-off state, and at the moment, the concentrated water is completely discharged through the first concentrated water flow path and the second concentrated water flow path; when the second concentrated water flow path is in a cut-off state, the backwater flow path is in a circulation state, at the moment, part of concentrated water is discharged through the first concentrated water flow path, and the other part of concentrated water flows back through the backwater flow path. Thus, the partial discharge, partial reflux and complete discharge of the concentrated water are realized by adjusting the flow cutoff of one flow path, the control is simple and convenient, and the control process is simplified.
In this embodiment, when the second concentrate flow path is in the circulation state, the water purification system is in the first water production state, that is, the water purification system is in the low recovery state, and the concentrate is discharged through the first concentrate flow path and the second concentrate flow path, so that the reverse osmosis filter element can be flushed at this time; when the second concentrated water flow path is in a cut-off state, the water purifying system is in a second water making state, namely, the water purifying system is in a high recovery rate state; the first water making state and the second water making state are operated alternately, so that intermittent backflow and intermittent discharge can be realized, the intermittent backflow increases the water quantity entering the RO membrane on one hand, the RO membrane is flushed in time, the concentration polarization on the surface of the RO membrane is slowed down, the service life of the RO membrane is prolonged, the discharge of waste water is reduced, and the recovery rate of the system is improved; intermittent discharge disturbs the formation of small crystal nuclei, slows down scaling on the surface of the RO membrane and improves the service life of the RO membrane.
In this embodiment, the multiple pipelines include a connection part, a return pipeline 43, a first concentrate pipeline 41 and a second concentrate pipeline 42, where the water inlet end of the connection part is communicated with the concentrate outlet and the water outlet end of the connection part is connected with the water inlet end of the return pipeline 43 and the water inlet end of the second concentrate pipeline 42, the water inlet end of the first concentrate pipeline 41 is communicated with the concentrate outlet, the connection part has a throttling state and a fully open state, the return pipeline 43 is provided with a unidirectional component 72 that only allows concentrate to flow toward the purified water inlet, the first concentrate pipeline 41 is provided with a throttling component 71, and the second concentrate pipeline 42 is provided with a switching component 73. Opening the switch member 73, and circulating the second concentrate line 42; the switch member 73 is closed, and the second concentrate line 42 is shut off. The connecting part and the return pipeline 43 in the throttling state form a water return flow path, the connecting part and the second concentrated water pipeline 42 in the throttling state form a second concentrated water flow path, the first concentrated water pipeline 41 forms a first concentrated water flow path, the connecting part and the return pipeline 43 in the fully opened state form a circulating flushing flow path, the connecting part and the second concentrated water pipeline 42 in the fully opened state form a pulse flushing flow path, the first water making state, the second water making state, the circulating flushing and the pulse flushing can be realized, the structure is simpler, and the switching between the first water making state and the second water making state can be realized only by controlling the switch component 73 during control, and the control is simpler.
In the present embodiment, the throttle member 71 is a waste water ratio. Of course, the waste water ratio may be replaced with a throttle valve. The switch part 73 is a solenoid valve, the circulation of the second concentrated water pipeline is cut off through the power-on control of the solenoid valve, the reliability is higher, and the running time of the first water making state and the second water making state is controlled through adjusting the power-on time and the power-off time, so that the adjustment is simpler and more convenient. The unidirectional component 72 is a unidirectional valve, and the unidirectional valve is convenient to use and low in cost.
In this embodiment, the connection portion is a connection pipe 44, the connection pipe 44 is provided with a waste water ratio solenoid valve 57, the waste water ratio solenoid valve 57 has a throttled state and a fully opened state, the throttled connection pipe 44 and the return pipe 43 form a return water flow path, the throttled connection pipe 44 and the second water concentrate pipe 42 form a second water concentrate flow path, the first water concentrate pipe 41 forms a first water concentrate flow path, the fully opened connection pipe 44 and the return pipe 43 form a circulation flushing flow path, and the fully opened connection pipe 44 and the second water concentrate pipe 42 form a pulse flushing flow path. The waste water is in the full-open state when the electromagnetic valve 57 is electrified, is in the throttling state when the electromagnetic valve is powered off, the switching between water making and flushing can be realized by controlling the on-off of the waste water and the electromagnetic valve, the waste water is always powered off when the water is made, the switching between the first water making state and the second water making state is realized by controlling the on-off of the electromagnetic valve, the waste water is always electrified than the electromagnetic valve when the water is flushed, and the switching between the circulating flushing and the pulse flushing is realized by controlling the on-off of the electromagnetic valve, so that the control is very simple.
In the present embodiment, the water inlet end of the connecting pipe 44 is connected to the first concentrate pipe 41, so that the pipe arrangement is more compact, and the size of the water purifier is miniaturized. Specifically, the connection between the connection pipe 44 and the first concentrate pipe 41 is a split connection, and the downstream pipe of the first concentrate pipe 41 at the split connection is provided with a wastewater ratio.
In this embodiment, the front water outlet and the purified water inlet are connected through the water inlet pipeline 31, and the water inlet end of the purified water pipeline 35 is connected to the water inlet pipeline 31, so that the front water outlet and the purified water inlet are conveniently connected.
In this embodiment, the junction between the water inlet pipe 31 and the water purifying pipe 35 is a split junction, and the downstream pipe of the water inlet pipe 31 at the split junction is provided with a pressure stabilizing component 52, where the pressure stabilizing component 52 provides the required stable pressure for the reverse osmosis filter element. Specifically, the pressure stabilizing component 52 is a pressure stabilizing pump, which is convenient to use and reduces the cost.
In this embodiment, a water inlet electromagnetic valve 51 is provided on a downstream pipeline of the water inlet pipeline 31 at the split junction, and the water inlet electromagnetic valve 51 is opened when energized and closed when de-energized, for controlling the flow and cut-off of purified water in the water inlet pipeline 31.
In the present embodiment, the water intake solenoid valve 51 is located upstream of the pressure stabilizing pump, and the concentrate in the return line 43 flows back between the water intake solenoid valve 51 and the pressure stabilizing pump. Of course, the concentrated water in the return line 43 may be returned to the space between the pre-filter and the water inlet solenoid valve, or to the front of the pre-filter.
In this embodiment, the pure water outlet and the rear water inlet are connected through the water outlet pipeline 32, and the water outlet pipeline 32 is provided with a check valve 53, and the check valve 53 can prevent the pure water from flowing backwards.
In this embodiment, the rear water outlet is connected to a pure water pipe 33, and a high-voltage switch 55 is provided on the pure water pipe 33. The high-voltage switch 55 can control the start and stop of the water purifying system, and when the high-voltage switch 55 detects low voltage, the water purifying system prepares pure water; when the high voltage switch 55 detects a high voltage, the water purifying system stops the pure water production.
The following describes the operation of the water purification system of this embodiment:
when the water purification system is used for preparing water, if a user uses purified water: after raw water enters a preposed filter element of the composite filter element for filtration, the raw water is divided into two branches, wherein one branch is a water purification branch: can be directly connected with a tap to be used as domestic drinking water.
If pure water is used by the user: when the user turns on the tap water, when the high-voltage switch is lower than the preset value, the water purification system starts to produce water. Raw water is filtered by a front filter element of the composite filter element, enters the reverse osmosis filter element through the water inlet electromagnetic valve 51 and the pressure stabilizing pump, and is subjected to advanced treatment by the reverse osmosis filter element to be separated into pure water and concentrated water, wherein the pure water enters a rear filter element of the composite filter element through the one-way valve, and the pure water filtered by the rear filter element is connected with a tap through the high-voltage switch for a user to use.
When the user turns off the faucet, the high-voltage switch is higher than a preset value, and the water purifying system stops water production.
When the water purification system prepares water, the water purification system circularly operates between a low recovery state and a high recovery state, for example, the low recovery state operates for t1 time and the high recovery state operates for t2 time, and the specific steps are as follows:
when the water purification system is operated in a low recovery state, the waste water is deenergized and the solenoid valve is energized compared with the solenoid valve 57. After the concentrated water discharged from the surface of the RO membrane is treated by a concentrated water treatment unit, a part of the concentrated water is discharged by a waste water ratio; the other part of concentrated water is discharged through the waste water ratio electromagnetic valve and the electromagnetic valve.
After t1, the water purification system is in a high recovery state, and the wastewater is powered off and the electromagnetic valve is powered off compared with the electromagnetic valve. After the concentrated water discharged from the surface of the RO membrane is treated by a concentrated water treatment unit, a part of the concentrated water is discharged by a waste water ratio; and the other part of concentrated water flows back between the water inlet electromagnetic valve and the pressure stabilizing pump through the wastewater ratio electromagnetic valve and the one-way valve.
And (3) after t2, the water purification system enters low recovery rate operation again, and the circulation is performed.
When the water purification system is washed, two washing modes exist, namely, one mode: the waste water is electrified and the electromagnetic valve is powered off compared with the electromagnetic valve. During flushing, the concentrated water discharged from the surface of the RO membrane is treated by the concentrated water treatment unit in sequence, and then flows back to the space between the water inlet electromagnetic valve and the pressure stabilizing pump through the wastewater ratio electromagnetic valve and the one-way valve, so that a circulating flushing mode of the RO membrane filter core is realized. Mode two: the waste water is electrified compared with the electromagnetic valve, and the electromagnetic valve is electrified. The concentrated water discharged from the surface of the RO membrane is sequentially discharged through a concentrated water treatment unit, a waste water ratio electromagnetic valve and an electromagnetic valve, so that the pulse flushing of the RO membrane filter core is realized. The first flushing mode and the second flushing mode can be combined to realize the circulating pulse flushing of the water purifying system.
Example two
Fig. 2 shows a structure of a second embodiment of the water purification system of the present invention, which is different from the first embodiment in that in the second embodiment, a flowmeter 54 is further disposed on a pure water pipeline, and the flowmeter 54 is used for marking the problems of the service life of a post filter element of the composite filter element, long-distance water delivery, air closure, frequent start and stop of a high-voltage switch, etc.
Example III
Fig. 3 shows the structure of a third embodiment of the water purification system of the present invention, which is different from the second embodiment in that the TDS probe 58, the flow rate detecting unit 61, and the water quality detecting unit 62 are included, in the third embodiment, the water purification system further includes the TDS probe 58, the TDS probe 58 is disposed on the water outlet pipe 32, and the TDS probe 58 detects the pure water TDS in real time to alert the user of the operation state of the water purifier and the water safety.
In this embodiment, the TDS probe 58 is provided with a bulb to alert the user that the original water temperature is too low or too high, which can affect the life of the reverse osmosis membrane and the performance of the water purifier, requiring protection of the water purifier.
In this embodiment, the water purifying pipeline 35 is provided with a flow detecting component 61, and the flow detecting component 61 can monitor the service life of the composite filter element and the purified water amount more accurately. Specifically, the flow rate detecting member 61 is a flow meter, which is convenient to use.
In the present embodiment, the water quality detecting means 62 is provided on the upstream line of the water inlet line 31 at the split junction. The water quality detection component 62 can detect the water quality conditions of the purified water filtered by the front filter element, such as TDS, hardness, alkalinity and the like in real time, and remind a user of the real-time water quality condition of the purified water; according to the local raw water quality or the real-time water quality condition, the time ratio of t1 to t2 is intelligently adjusted, so that the water purifier can operate at the most proper recovery rate, and the first flushing mode and the second flushing mode can be intelligently adjusted, so that intelligent pulse circulation flushing is realized. Specifically, the water quality detecting part 62 is a water quality detector.
Example IV
Fig. 4 shows a structure of a fourth embodiment of the water purifying system of the present invention, which is different from the third embodiment in a connection portion. In the fourth embodiment, the connecting portion includes a first pipeline 45 and a second pipeline 46 which are arranged in parallel, the first pipeline 45 is provided with a waste water ratio 74, the second pipeline 46 is provided with a solenoid valve 75, that is, the waste water ratio solenoid valve 57 of the third embodiment is replaced by a combination of the waste water ratio 74 and the solenoid valve 75 to form the structure of the water purification system of the fourth embodiment.
Example five
Fig. 5 shows a structure of a fifth embodiment of the water purification system according to the present invention, which is different from the first embodiment in that the high-pressure switch 55 and the pressure water storage part 56 are connected to the downstream line of the water outlet line 32, which is located at the check valve 53, by the high-pressure switch, the pressure water storage part, the flow rate detection part 61, the water quality detection part 62, the flow meter 54, and the TDS probe 58.
In this embodiment, the water outlet pipe 32 is located on the downstream pipe of the check valve 53 and is connected with the bypass pipe 36, the high-voltage switch 55 is disposed on the bypass pipe 36, and one end of the bypass pipe 36 away from the water outlet pipe 32 is connected with the pressure water storage part 56. Specifically, the pressure water storage part 56 may be a water storage device such as a pressure tank or a compressed water bag.
In this embodiment, the water purifying pipeline 35 is provided with a flow detecting component 61, and the flow detecting component 61 can monitor the service life of the composite filter element and the purified water amount more accurately. Specifically, the flow rate detecting member 61 is a flow meter, which is convenient to use.
In the present embodiment, the water quality detecting means 62 is provided on the upstream line of the water inlet line 31 at the split junction. The water quality detection component 62 can detect the water quality conditions of the purified water filtered by the front filter element, such as TDS, hardness, alkalinity and the like in real time, and remind a user of the real-time water quality condition of the purified water; according to the local raw water quality or the real-time water quality condition, the time ratio of t1 to t2 is intelligently adjusted, so that the water purifier can operate at the most proper recovery rate, and the first flushing mode and the second flushing mode can be intelligently adjusted, so that intelligent pulse circulation flushing is realized. Specifically, the water quality detecting part 62 is a water quality detector.
In this embodiment, the water purification system further includes a TDS probe 58, the TDS probe 58 is disposed on the water outlet pipeline 32, and the TDS probe 58 detects the pure water TDS in real time, so as to remind the user of the running state of the water purifier and the water safety condition. The TDS probe 58 has a bulb to alert the user that the original water temperature is too low or too high, which can affect the life of the reverse osmosis membrane and the performance of the purifier, requiring protection of the purifier.
In this embodiment, the pure water pipeline is further provided with a flowmeter 54, and the flowmeter 54 is used for marking the problems of the service life of the rear filter element of the composite filter element, long-distance water delivery, air-closure, frequent start and stop of the high-voltage switch, and the like.
Of course, the water quality detector, the TDS probe, the pure water and the pure water flowmeter can be simplified according to the requirements.
The following describes the operation of the water purification system of this embodiment:
when the water purification system is used for preparing water, if a user uses purified water: raw water enters a preposed filter element of the composite filter element and is filtered and then passes through a water quality detector, and the raw water is divided into two flow paths, wherein one flow path is a water purifying pipeline: can be directly connected with a tap through a flowmeter to be used as domestic drinking water.
If pure water is used by the user: when the user turns on the tap water, when the high-voltage switch is lower than the preset value, the water purification system starts to produce water. Raw water is filtered by a preposed filter element of the composite filter element, and then enters a reverse osmosis filter element through a water quality detector, a water inlet electromagnetic valve and a pressure stabilizing pump, and water subjected to advanced treatment by the reverse osmosis filter element is purified water and concentrated water. Wherein, pure water can be divided into two flow paths, one flow path: the water enters a pressure barrel through a one-way valve and a high-pressure switch; another flow path: after the water enters the rear filter element of the composite filter element through the one-way valve and is treated, the water flows out through the flowmeter and the TDS probe with the temperature sensing bag, and the pure water flowing out can be directly connected with a water tap for users to use. The water discharged from the pressure barrel can also directly enter the rear filter element of the composite filter element through the high-voltage switch for treatment, and then flows out through the flowmeter and the TDS probe with the temperature sensing bulb, and is connected with the tap for direct use by a user.
When the user turns off the faucet, the high-voltage switch is higher than a preset value, and the water purifying system stops water production.
When the water purification system prepares water, the water purification system circularly operates between a low recovery state and a high recovery state, for example, the low recovery state operates for t1 time and the high recovery state operates for t2 time, and the specific steps are as follows:
when the water purification system is operated in a low recovery state, the waste water is deenergized and the solenoid valve is energized compared with the solenoid valve 57. After the concentrated water discharged from the surface of the RO membrane is treated by a concentrated water treatment unit, a part of the concentrated water is discharged by a waste water ratio; the other part of concentrated water is discharged through the waste water ratio electromagnetic valve and the electromagnetic valve.
After t1, the water purification system operates in a high recovery state, and the wastewater is powered off and the electromagnetic valve is powered off compared with the electromagnetic valve. After the concentrated water discharged from the surface of the RO membrane is treated by a concentrated water treatment unit, a part of the concentrated water is discharged by a waste water ratio; and the other part of concentrated water flows back between the water inlet electromagnetic valve and the pressure stabilizing pump through the wastewater ratio electromagnetic valve and the one-way valve.
And (3) after t2, the water purification system enters low recovery rate operation again, and the circulation is performed.
When the water purifying system is used for flushing, the two flushing modes of circulating flushing and pulse flushing can be realized as in the first embodiment, and detailed description is omitted.
Example six
Fig. 6 shows a structure of a sixth embodiment of the water purifying system of the present invention, which is different from the fifth embodiment in a connection portion. In the sixth embodiment, the connecting portion includes a first pipeline 45 and a second pipeline 46 which are arranged in parallel, the first pipeline 45 is provided with a waste water ratio 74, the second pipeline 46 is provided with a solenoid valve 75, that is, the combination of the waste water ratio 74 and the solenoid valve 75 is used to replace the waste water ratio solenoid valve 57 in the fifth embodiment to form the structure of the water purification system in the sixth embodiment.
The invention also provides a water purifier, which comprises: the device comprises a machine body and a water purifying system arranged on the machine body, wherein the water purifying system is the water purifying system.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
1. the front filter element and the rear filter element are combined into one filter element, the filter elements are integrated, the number of the filter elements is reduced, the core replacement frequency and the core replacement cost of users are reduced, the number of waterway joints is reduced, the water leakage risk is reduced, the water purification system is simplified, and the size miniaturization of the water purifier is realized.
2. The water purification system has two functions of water outlet and water outlet, and meets the use requirements of users.
3. The wastewater is intermittently refluxed and intermittently discharged, so that the wastewater discharge is reduced, the RO membrane is timely flushed, the pressure before the RO membrane is relatively stable, and the effects of saving water and protecting the RO membrane are achieved.
4. The method realizes cyclic pulse flushing, can more effectively slow down concentration polarization on the surface of the RO membrane than the common flushing mode, and prolongs the service life of the RO membrane.
5. The concentrated water treatment unit can further treat concentrated water discharged from the surface of the RO membrane, slow down the concentration polarization of the surface of the RO membrane, better protect the RO membrane and prolong the service life of the RO membrane.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (11)
1. A water purification system, comprising:
the composite filter element (10) comprises a shell, a preposed filter element and a postposed filter element which are arranged in the shell and have mutually independent filtering channels, wherein the shell is provided with a preposed water inlet, a preposed water outlet, a postposed water inlet and a postposed water outlet,
a reverse osmosis filter element (20) which is provided with a pure water inlet communicated with the front water outlet, a pure water outlet communicated with the rear water inlet and a concentrated water outlet,
it is characterized in that the method comprises the steps of,
the water purification system further comprises a concentrated water treatment unit (80), the concentrated water treatment unit (80) is provided with a concentrated water inlet and a concentrated water outlet which are communicated with the concentrated water outlet so as to treat the concentrated water discharged from the reverse osmosis filter element (20) and slow down concentration polarization,
the concentrated water outlet is connected with a plurality of pipelines, a circulating flushing flow path for communicating the concentrated water outlet with the purified water inlet and a pulse flushing flow path capable of being cut off on-off are formed in the pipelines,
when the pulse flushing flow path is in a circulation state, the circulating flushing flow path is in a cut-off state, and when the pulse flushing flow path is in a cut-off state, the circulating flushing flow path is in a circulation state so as to realize circulating flushing and pulse flushing through the cut-off of the pulse flushing flow path during flushing;
a first concentrated water flow path for discharging concentrated water and throttling the concentrated water, a second concentrated water flow path capable of flowing and stopping and throttling the concentrated water and a return water flow path for communicating the concentrated water outlet with the purified water inlet and throttling the concentrated water are formed in the pipelines, wherein when the second concentrated water flow path is in a flowing state, the first concentrated water flow path is in a flowing state, and the return water flow path is in a stopping state; when the second concentrated water flow path is in a cut-off state, the first concentrated water flow path and the backwater flow path are in a circulation state, so that the partial discharge, the partial reflux and the complete discharge of concentrated water are realized through the circulation cut-off of the second concentrated water flow path when water is produced.
2. The water purification system of claim 1, further comprising a purified water outlet in communication with the pre-water outlet to enable purified water to flow from the purified water outlet.
3. The water purification system according to claim 2, further comprising a water purification pipe (35), the water inlet end of the water purification pipe (35) being in communication with the pre-water outlet and the water outlet end thereof forming the water purification water outlet.
4. The water purification system of claim 1, wherein the cyclical rinse flow path and the pulsed rinse flow path operate alternately.
5. The water purification system according to claim 1, wherein the concentrate treatment unit (80) is an ultrafiltration cartridge or a nanofiltration cartridge.
6. The water purification system according to claim 1, wherein the concentrate treatment unit (80) is connected to the concentrate outlet via an intermediate line (49).
7. The water purification system of any one of claims 1 to 6, wherein the water purification system is in a first water-producing state when the second concentrate flow path is in a flow-through state, and wherein the water purification system is in a second water-producing state when the second concentrate flow path is in a shut-off state, the first water-producing state and the second water-producing state alternately operating.
8. The water purification system according to any one of claims 1 to 6, wherein a plurality of the pipes include a connection portion, a return pipe (43), a first concentrate pipe (41) and a second concentrate pipe (42), a water inlet end of the connection portion is communicated with the concentrate outlet and a water outlet end thereof is connected with a water inlet end of the return pipe (43) and a water inlet end of the second concentrate pipe (42), a water inlet end of the first concentrate pipe (41) is communicated with the concentrate outlet, the connection portion has a throttle state and a fully opened state, a unidirectional member (72) allowing only concentrate to flow toward the purified water inlet is provided on the return pipe (43), a throttle member (71) is provided on the first concentrate pipe (41), and a switch member (73) is provided on the second concentrate pipe (42).
9. The water purification system according to claim 8, wherein the connection portion is a connection pipe (44), and a waste water ratio solenoid valve (57) is provided on the connection pipe (44).
10. The water purification system according to claim 8, wherein the connection portion comprises a first pipeline (45) and a second pipeline (46) which are arranged in parallel, a waste water ratio (74) is arranged on the first pipeline (45), and a solenoid valve (75) is arranged on the second pipeline (46).
11. A water purifier, comprising: a body and a water purification system provided on the body, wherein the water purification system is the water purification system according to any one of claims 1 to 10.
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| CN110980993B (en) * | 2019-12-30 | 2023-11-03 | 珠海格力电器股份有限公司 | Water purifier and automatic flushing device and flushing method thereof |
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