CN108975540B - Water purification system and water purifier - Google Patents
Water purification system and water purifier Download PDFInfo
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- CN108975540B CN108975540B CN201810972460.9A CN201810972460A CN108975540B CN 108975540 B CN108975540 B CN 108975540B CN 201810972460 A CN201810972460 A CN 201810972460A CN 108975540 B CN108975540 B CN 108975540B
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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 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 purified water inlet communicated with the front water outlet, a purified water outlet communicated with the rear water inlet and a concentrated water outlet, 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 water purifying system further comprises a water storage tank arranged in the circulating flushing flow path so as to increase the flow rate of the surface of the reverse osmosis filter element when the pulse flushing flow path is in a circulation state, the circulating flushing flow path is in a cut-off state when the pulse flushing flow path is in a cut-off state. The invention has simple control and increases the flow for flushing 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 purification system, the water purification system comprises a composite filter element and an RO membrane filter element, the composite filter element comprises a shell and 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 waste water outlet communicated with a waste water pipe, the waste water outlet is connected with the waste water pipe, a return pipe is connected to the waste water pipe, one end, far away from the waste water pipe, of the return pipe is connected to a pipeline between the front filter element and the RO membrane filter element, a waste water control valve is arranged on the waste water pipe, the return pipe is provided with a return control valve, the opening of the waste water control valve and the return control valve is adjustable, circulating flushing and pulse flushing are realized by adjusting the opening of the two control valves, and the flow of flushing the surface of the RO membrane filter element is small during flushing. Therefore, there is an urgent need for a water purification system that controls the ease and flow rate of the RO membrane cartridge surface during flushing.
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 and the flow rate on the surface of an RO membrane filter core is small when the RO membrane filter core is washed due to the fact that the circulation washing and the pulse washing are realized by adjusting the opening of two control valves.
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 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 in a on-off mode are formed in the pipelines, the water purifying system further comprises a water storage tank arranged in the circulating flushing flow path so as to increase the flow rate of the surface of the reverse osmosis filter element during flushing, wherein the circulating flushing flow path is in a cut-off state when the pulse flushing flow path is in a cut-off state, and the circulating flushing flow path is in a circulation state so as to realize circulating flushing and pulse flushing through the circulation stop of the pulse flushing flow path during flushing.
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, a water storage inlet of the water storage tank is communicated with the front water outlet through a water storage pipeline, and a first switch component is arranged on the water storage pipeline.
Further, a low water level detection part and a high water level detection part are arranged on the water storage tank, when the low water level detection part detects that the water level in the water storage tank is lower than the low water level, the first switch part is opened, and when the high water level detection part detects that the water level in the water storage tank is higher than the high water level, the first switch part is closed.
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 return water flow path for communicating a concentrated water outlet with a purified water inlet and throttling the concentrated water are formed in the pipelines, and the water storage tank is further arranged in the return water flow path, 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.
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 delivery port 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 communicates with dense water delivery port, 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, the outlet end of return line is connected with the water storage water inlet of storage water tank, the water storage water delivery port and the water purification water inlet intercommunication of storage water tank, be equipped with throttle part on the first dense water pipeline, be equipped with the second switch part 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 water storage tank is arranged in the circulating flushing flow path, so that the flow for flushing the surface of the RO membrane is increased, and the RO membrane can be more effectively flushed. 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; 48. a water storage 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 second switching part; 74. waste water ratio; 75. an electromagnetic valve; 76. a first switching member; 77. a low water level detecting part; 78. a high water level detecting part; 92. and a water storage tank.
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 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 turned on and off are formed in the pipelines, the water purifying system further comprises a water storage tank 92 arranged in the circulating flushing flow path so as to increase the flow rate of the surface of the reverse osmosis filter element 20 during flushing, wherein the circulating flushing flow path is in a cut-off state when the pulse flushing flow path is in a circulation state, and the circulating flushing flow path is in a circulation state when the pulse flushing flow path is in a cut-off state so as to realize circulating flushing and pulse flushing through the circulation cut-off 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 water storage tank 92 is provided in the circulation washing flow path, and increases the flow rate of washing the RO membrane surface, thereby washing the RO membrane more effectively. 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 water storage inlet of the water storage tank 92 is communicated with the front water outlet through a water storage pipeline 48, and the water storage pipeline 48 is provided with a first switch component 76. Opening the first switch member 76 to allow the water storage passage 48 to communicate; the first switch member 76 is closed, the water storage pipeline 48 is cut off, and whether the water storage tank is filled with water is controlled by the switch of the first switch member 76.
In this embodiment, the water storage tank 92 is provided with the low water level detecting part 77 and the high water level detecting part 78, when the low water level detecting part 77 detects that the water level in the water storage tank 92 is lower than the low water level, the first switch part 76 is turned on to start water inflow; when the high water level detecting part 78 detects that the water level in the water storage tank 92 is higher than the high water level, the first switch part 76 is turned off to stop water inflow. Specifically, the first switch member 76 is a solenoid valve that is energized to supply water and de-energized to stop supply of water.
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, and the water storage tank 92 is further arranged in the return water flow path, 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 water return flow path is in a circulation state, at the moment, a part of concentrated water is discharged through the first concentrated water flow path, the other part of concentrated water flows back to the water storage tank through the water return flow path, and the concentrated water flowing back to the water tank part enters the water tank and is diluted, so that concentration polarization on the surface of the RO membrane can be effectively slowed down. 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 water 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 water 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 water to flow toward the purified water inlet, the water outlet end of the return pipeline 43 is connected with the water storage inlet of the water storage tank 92, the water storage outlet of the water storage tank 92 is communicated with 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 second switching component 73. Opening the second switch member 73, and circulating the second concentrate line 42; the second switching 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 second 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 second switch member 73 is a solenoid valve, and the circulation of the second concentrated water pipeline is cut off by controlling the on-off of the solenoid valve, so that the reliability is higher, and the running time of the first water making state and the second water making state is controlled by adjusting the on-off time and the on-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:
if the user uses purified water: when a user opens the water tap to use purified water, the purified water flowing out after the raw water is filtered by the front filter element of the composite filter element can be directly connected with the water tap for the user to use.
If the user uses pure water: when the user turns on the tap water, the high-voltage switch 55 is below a preset value, and 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, the pure water filtered by the rear filter element flows out through the high-voltage switch, and the flowing pure water can be directly connected with a faucet 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 the low recovery state, the waste water ratio solenoid valve 57 is de-energized, and the solenoid valve on the second concentrate line 42 is energized: discharging a part of concentrated water through a waste water ratio; another part of the concentrate is discharged through the waste water ratio solenoid valve 57 and the solenoid valve on the second concentrate line 42.
After time t1, the water purification system operates in a high recovery state, and the waste water ratio solenoid valve 57 is de-energized, and the solenoid valve on the second concentrate line 42 is de-energized: discharging a part of concentrated water through a waste water ratio; and the other part of concentrated water flows back to the water storage tank through the wastewater ratio electromagnetic valve and the one-way valve.
After the concentrated water flowing back into the water storage tank enters the water storage tank, if the water level in the water storage tank is lower than the low water level, the electromagnetic valve on the water storage pipeline is electrified, and the water filtered by the front filter element of the composite filter element enters the water storage tank; if the water level is higher than the high water level, the electromagnetic valve on the water storage pipeline is powered off. In the water storage tank, concentrated water flowing out of the RO membrane surface can be diluted in the water storage tank, and concentration polarization of the RO membrane surface can be effectively slowed down.
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 energized than solenoid valve 57 and the solenoid valve on second concentrate line 42 is de-energized. During flushing, water flushing the RO surface flows back to the space between the pressure stabilizing pump and the water inlet electromagnetic valve through the wastewater ratio electromagnetic valve, the one-way valve and the water storage tank in sequence, so that a circulating flushing mode of the RO membrane filter core is realized. Mode two: the waste water is energized more than the solenoid valve and the solenoid valve on the second concentrate line 42 is energized. The water flushing the RO surface during flushing is sequentially discharged through the waste water ratio electromagnetic valve and the electromagnetic valve on the second concentrated water pipeline 42, 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 and the flow detection part 61 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 purified 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 flow detection component 61 is disposed on the water purifying pipeline 35, and the flow detection component 61 can more accurately monitor the service life of the pre-filter element of the composite filter element and the purified water amount. Specifically, the flow rate detecting member 61 is a flow meter, which is convenient to use.
In the embodiment, the water quality detection unit is added in the water storage tank, and can detect parameters such as TDS, turbidity, hardness and alkalinity of water in the water storage tank, and can intelligently adjust the time ratio of t1 to t2 according to the condition of raw water quality, so that the water purifier can operate at the most proper recovery rate, and can also intelligently adjust the first flushing mode and the second flushing mode to realize intelligent pulse circulation flushing. Specifically, the water quality detection unit is a water quality detector.
Example IV
Fig. 4 shows the structure of a fourth embodiment of the water purification system of the present invention, which differs from the third embodiment in the connection portion and the water quality detecting member 62. 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.
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 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:
if the user uses purified water: raw water is filtered by the front filter element of the composite filter element and flows out through the flowmeter, and the flowing purified water can be directly connected with a tap for users to use. Wherein a flow meter of the clean water line may be used to mark the amount of clean water.
If the user uses pure water: raw water enters the reverse osmosis filter element through the water inlet electromagnetic valve 51 and the pressure stabilizing pump after being treated and filtered by the front filter element of the composite filter element, and the water after being deeply treated by the reverse osmosis filter element is divided into pure water and concentrated water, wherein the pure water can be divided into two flow paths, namely one flow path: enters the pressure barrel through the check valve 53 and the 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 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 the low recovery state, the waste water ratio solenoid valve 57 is de-energized, and the solenoid valve on the second concentrate line 42 is energized: discharging a part of concentrated water through a waste water ratio; another part of the concentrate is discharged through the waste water ratio solenoid valve 57 and the solenoid valve on the second concentrate line 42.
After time t1, the water purification system operates in a high recovery state, and the waste water ratio solenoid valve 57 is de-energized, and the solenoid valve on the second concentrate line 42 is de-energized: discharging a part of concentrated water through a waste water ratio; and the other part of concentrated water flows back to the water storage tank through the wastewater ratio electromagnetic valve and the one-way valve.
After the concentrated water flowing back into the water storage tank enters the water storage tank, if the water level in the water storage tank is lower than the low water level, the electromagnetic valve on the water storage pipeline is electrified, and the water filtered by the front filter element of the composite filter element enters the water storage tank; if the water level is higher than the high water level, the electromagnetic valve on the water storage pipeline is powered off. In the water storage tank, concentrated water flowing out of the RO membrane surface can be diluted in the water storage tank, and concentration polarization of the RO membrane surface can be effectively slowed down.
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 water storage tank is arranged, so that concentrated water is diluted when water is produced, the water quantity returned to the surface of the RO membrane is increased, the concentration polarization of the surface of the RO membrane is slowed down, the RO membrane is protected, and the service life of the RO membrane is prolonged; buffering action, turbulence is reduced; the flow for flushing the RO membrane surface is increased during flushing, so that the RO membrane can be more effectively flushed.
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 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,
the water purification system also comprises a water storage tank (92) arranged in the circulating flushing flow path so as to increase the flow rate of the surface of the reverse osmosis filter element (20) during flushing,
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, and the water storage tank (92) is further arranged in the return water flow path, 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 water storage inlet of the water storage tank (92) is communicated with the front water outlet through a water storage pipeline (48), and a first switch component (76) is arranged on the water storage pipeline (48).
6. The water purification system according to claim 5, wherein a low water level detection part (77) and a high water level detection part (78) are provided on the water storage tank (92), the first switch part (76) is turned on when the low water level detection part (77) detects that the water level in the water storage tank (92) is lower than the low water level, and the first switch part (76) is turned off when the high water level detection part (78) detects that the water level in the water storage tank (92) is higher than the high water level.
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 water outlet and a water outlet end thereof is both 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 water outlet, the connection portion has a throttle state and a fully opened state, a unidirectional part (72) allowing concentrate water to flow only in a direction of the concentrate water inlet is provided on the return pipe (43), a water outlet end of the return pipe (43) is connected with a water storage inlet of the water storage tank (92), a water storage outlet of the water storage tank (92) is communicated with the concentrate water inlet, a throttle part (71) is provided on the first concentrate pipe (41), and a second switch part (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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| CN109626616A (en) * | 2018-12-25 | 2019-04-16 | 珠海格力电器股份有限公司 | Water purification system and its control method |
| CN109534452A (en) * | 2019-01-16 | 2019-03-29 | 杭州老板电器股份有限公司 | RO filter core, water purification system and water purifier |
| CN109966924A (en) * | 2019-03-21 | 2019-07-05 | 清华苏州环境创新研究院 | A kind of control system of pressure type plate membrane filter system |
| CN110052078A (en) * | 2019-05-30 | 2019-07-26 | 宁夏尚禹节水科技有限公司 | Compound automatic backwashing filter and filter method |
| CN112723577A (en) * | 2021-01-08 | 2021-04-30 | 本源万物(南京)环境设备有限公司 | Water pump middle-arranged single-core water purification system with cavity and water purification method thereof |
| CN115385462A (en) * | 2021-05-25 | 2022-11-25 | 盛永贵 | Wastewater-free water purification system and intelligent control method thereof |
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