Water purification system and control method thereof

Abstract

The application discloses a water purification system and a control method thereof. The water purification system comprises a water inlet pipeline, a purified water pipeline, an air inlet pipeline, a reverse osmosis membrane filtration assembly and a control module; the first end of the water inlet pipeline is connected with a raw water inlet, and the second end of the water inlet pipeline is connected with a first water inlet of the reverse osmosis membrane filtration assembly; a micro-bubble water generating assembly is arranged on the water inlet pipeline; the air inlet end of the air inlet pipeline is connected with an air pump, and the air outlet end of the air inlet pipeline is connected with the water inlet pipeline; the water purification system comprises a cleaning mode; in the cleaning mode, the control module controls the air pump to be turned on, and controls the water path between the purified water pipeline and the water inlet pipeline to be disconnected; the raw water and the gas form micro-bubble water after passing through the micro-bubble water generating assembly, and the reverse osmosis membrane of the reverse osmosis membrane filtration assembly is cleaned by using the micro-bubble water. In the application, a cleaning pipeline does not need to be additionally arranged, the cleaning difficulty of the reverse osmosis membrane can be reduced, the cleaning efficiency is improved, the service life of the reverse osmosis membrane is prolonged, and the taste of the filtered pure water is ensured to be good.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of water purifiers, in particular to a water purification system and a control method thereof. BACKGROUND

[0002] With the improvement of people's living standards, more and more families pay attention to the quality of drinking water and install water purifiers to purify tap water. The core filter component of the existing water purifier is a reverse osmosis membrane filter assembly. When the water purifier is used for a long time, the impurities such as silt, rust, organic matter, microorganisms and calcium and magnesium ions in the tap water will deposit on the surface of the reverse osmosis membrane, causing the reverse osmosis membrane to be blocked, affecting the water flow and service life. The small-molecule organic matter and heavy metals deposited on the surface of the reverse osmosis membrane will diffuse to the pure water side, affecting the taste of the water quality.

[0003] In the related art, a cleaning agent (such as citric acid, sodium hydroxide, and a surfactant) is needed to clean and regenerate the surface of the reverse osmosis membrane. This cleaning method not only requires an additional booster pump and cleaning pipeline structure, but also has a complex operation procedure and low cleaning efficiency. SUMMARY

[0004] Therefore, the embodiment of the present application provides a water purification system and a control method thereof to reduce the cleaning difficulty of the reverse osmosis membrane, improve the cleaning efficiency, and thus prolong the service life of the reverse osmosis membrane and ensure that the filtered pure water has a good taste.

[0005] In a first aspect, the embodiment of the present application provides a water purification system, which comprises a water inlet pipeline, a purified water pipeline, an air inlet pipeline, a reverse osmosis membrane filter assembly, and a control module.

[0006] The first end of the water inlet pipeline is connected to a raw water inlet, and the second end of the water inlet pipeline is connected to a first water inlet of the reverse osmosis membrane filter assembly. A micro-bubble water generating assembly is arranged on the water inlet pipeline, and the micro-bubble water generating assembly is close to the second end of the water inlet pipeline.

[0007] The first end of the purified water pipeline is connected to a first water outlet of the reverse osmosis membrane filter assembly, and the second end of the purified water pipeline is connected to a water outlet faucet. The air inlet end of the air inlet pipeline is connected to an air pump, and the air outlet end of the air inlet pipeline is connected to the water inlet pipeline.

[0008] The water purification system comprises a cleaning mode. In the cleaning mode, the control module controls the air pump to be turned on and controls the water path between the purified water pipeline and the water inlet pipeline to be disconnected. The raw water and the gas form micro-bubble water after passing through the micro-bubble water generating assembly, and the reverse osmosis membrane of the reverse osmosis membrane filter assembly is cleaned by the micro-bubble water.

[0009] Optionally, the water purification system further comprises a concentrated water pipeline, a first end of the concentrated water pipeline being connected to the second water outlet of the reverse osmosis membrane filtration assembly, and a second end of the concentrated water pipeline being connected to a concentrated water outlet; and the concentrated water pipeline comprises a concentrated water electromagnetic valve.

[0010] The cleaning mode comprises a direct flushing program, in which the control module controls the air pump and the concentrated water electromagnetic valve to be turned on, and the micro-bubble water flushes the reverse osmosis membrane and is then discharged through the concentrated water outlet.

[0011] Optionally, the water purification system further comprises a backflow pipeline, a first end of the backflow pipeline being connected to the concentrated water pipeline, and a second end of the backflow pipeline being connected to the water inlet pipeline; the backflow pipeline comprises a backflow electromagnetic valve and a first one-way valve, an inlet of the first one-way valve being close to the first end of the backflow pipeline, and an outlet of the first one-way valve being close to the second end of the backflow pipeline.

[0012] The cleaning mode further comprises a circulating flushing program, in which the control module controls the backflow electromagnetic valve to be turned on and controls the concentrated water electromagnetic valve to be turned off, and the micro-bubble water flows in the water inlet pipeline and the backflow pipeline and circulates to flush the reverse osmosis membrane.

[0013] Optionally, the cleaning mode further comprises a drainage program, which is executed after the circulating flushing program; in the drainage program, the control module controls the concentrated water electromagnetic valve to be turned on and controls the backflow electromagnetic valve to be turned off, and the micro-bubble water that circulates to flush the reverse osmosis membrane is discharged through the concentrated water outlet.

[0014] Optionally, the concentrated water pipeline further comprises a water quality detection device, the water quality detection device and the concentrated water electromagnetic valve being arranged in a communication path of the first end and the second end of the concentrated water pipeline in sequence; and the water quality detection device is configured to detect an impurity parameter in water.

[0015] The control module is further electrically connected with the water quality detection device, and the control module is further configured to acquire the impurity parameter detected by the water quality detection device, and control the water purification system to enter the cleaning mode when the impurity parameter is greater than an impurity parameter threshold.

[0016] Optionally, the control module is further configured to control the water purification system to enter the direct flushing program when the impurity parameter is greater than the impurity parameter threshold, and enter the circulating flushing program after the direct flushing program is executed for a preset flushing duration.

[0017] In the circulating flushing program, the control module is further configured to control the water purification system to enter the drainage program when an increasing rate of the impurity parameter is less than or equal to a first increasing rate threshold, and enter the direct flushing program again after the drainage program is executed for a preset drainage duration, and the direct flushing program, the circulating flushing program and the drainage program are executed in a cycle.

[0018] In the cleaning mode, the control module is further configured to control the concentrated water electromagnetic valve to open and the backflow electromagnetic valve to close when the increasing rate of the impurity parameter is less than or equal to a second increasing rate threshold, and to end the cleaning mode after the micro-bubble water is discharged.

[0019] Optionally, the water inlet pipeline comprises a first filter cartridge, a water inlet electromagnetic valve, a gas dissolving tank and a booster pump; the first filter cartridge, the water inlet electromagnetic valve, the gas dissolving tank and the booster pump are sequentially arranged in a communication path between the raw water inlet and the micro-bubble water generating assembly.

[0020] In the direct flushing program, the control module further controls the water inlet electromagnetic valve and the booster pump to open; in the circulating flushing program, the control module further controls the booster pump to open and the water inlet electromagnetic valve to close; and in the drainage program, the control module further controls the water inlet electromagnetic valve and the booster pump to open.

[0021] Optionally, the micro-bubble water generating assembly comprises a bubbling electromagnetic valve, the bubbling electromagnetic valve comprises an open state and a closed state, in the open state, the raw water remains unchanged in shape after passing through the bubbling electromagnetic valve, and in the closed state, the raw water forms micro-bubble water after passing through the bubbling electromagnetic valve.

[0022] In the direct flushing program and the circulating flushing program, the control module is further configured to control the bubbling electromagnetic valve to be in the closed state; and in the drainage program, the control module is further configured to control the bubbling electromagnetic valve to be in the open state.

[0023] Optionally, the purified water pipeline comprises a second filter cartridge and a purified water electromagnetic valve, the second filter cartridge and the purified water electromagnetic valve are sequentially arranged in a communication path between a first end and a second end of the purified water pipeline.

[0024] The purified water system further comprises a pure water taking mode, in the pure water taking mode, the control module controls the water inlet electromagnetic valve, the booster pump, the bubbling electromagnetic valve, the purified water electromagnetic valve and the concentrated water electromagnetic valve to open, and the raw water flows to the reverse osmosis membrane filtering assembly; wherein part of the raw water becomes pure water after being filtered by the reverse osmosis membrane filtering assembly, the pure water flows out through the water outlet faucet, and the other part of the raw water becomes concentrated water, the concentrated water is discharged through the concentrated water outlet.

[0025] In a second aspect, the embodiments of the present application further provide a control method of a purified water system, which is applicable to the purified water system provided by the embodiments of the present application, and the control method of the purified water system comprises:

[0026] In the cleaning mode, the control module controls the air pump to open and the water path between the purified water pipeline and the water inlet pipeline to be disconnected, the raw water and the gas form micro-bubble water after passing through the micro-bubble water generating assembly, and the reverse osmosis membrane of the reverse osmosis membrane filtering assembly is cleaned by using the micro-bubble water.

[0027] The embodiment of the present application provides a water purification system, which comprises: a water inlet pipeline, a water purification pipeline, an air inlet pipeline, a reverse osmosis membrane filtering assembly and a control module; the first end of the water inlet pipeline is connected with a raw water inlet, and the second end of the water inlet pipeline is connected with a first water inlet of the reverse osmosis membrane filtering assembly; a micro-bubble water generating assembly is arranged on the water inlet pipeline, and the micro-bubble water generating assembly is close to the second end of the water inlet pipeline; the first end of the water purification pipeline is connected with a first water outlet of the reverse osmosis membrane filtering assembly, and the second end of the water purification pipeline is connected with a water outlet faucet; the air inlet end of the air inlet pipeline is connected with an air pump, and the air outlet end of the air inlet pipeline is connected with the water inlet pipeline; the water purification system comprises a cleaning mode; in the cleaning mode, the control module controls the air pump to be turned on, and controls the water path between the water purification pipeline and the water inlet pipeline to be disconnected, raw water and gas form micro-bubble water after passing through the micro-bubble water generating assembly, and the reverse osmosis membrane of the reverse osmosis membrane filtering assembly is cleaned by using the micro-bubble water. By adopting the above scheme, in the cleaning mode, the micro-bubble water can be introduced into the reverse osmosis membrane filtering assembly, the surface of the reverse osmosis membrane is cleaned by using the micro-bubble water, the cleanliness of the reverse osmosis membrane is ensured, and the service life and the filtering effect of the reverse osmosis membrane filtering assembly are improved. In addition, the above scheme does not need to additionally arrange a cleaning pipeline, and does not need to add a cleaning agent to clean the reverse osmosis membrane, so that the structure of the water purification system and the cleaning process of the reverse osmosis membrane can be simplified, and the cleaning efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A structural schematic diagram of a water purification system provided by the embodiment of the present application is provided.

[0029] Figure 2 A flow chart of a control method of a water purification system provided by the embodiment of the present application is provided.

[0030] Figure 3 A control logic diagram of a control method of a water purification system provided by the embodiment of the present application is provided.

[0031] Reference signs:

[0032] 10-water inlet pipeline; 101-micro-bubble water generating assembly; 1011-foaming electromagnetic valve; 102-first filtering filter core; 103-water inlet electromagnetic valve; 104-dissolved gas tank; 105-boosting pump; 106-water-gas proportioning mechanism; 1061-flow control valve; 1062-pressure reducing valve; 107-pressure detection assembly;

[0033] 20-water purification pipeline; 201-second filtering filter core; 202-water purification electromagnetic valve;

[0034] 30-air inlet pipeline; 301-air pump; 302-second one-way valve;

[0035] 40-reverse osmosis membrane filtering assembly; 40a-first water inlet; 40b-first water outlet; 40c-second water outlet;

[0036] 50 - concentrated water pipeline; 501 - concentrated water electromagnetic valve; 502 - concentrated water outlet valve; 503 - water quality detection device;

[0037] 60 - backflow pipeline; 601 - backflow electromagnetic valve; 602 - first one-way valve;

[0038] 70 - micro-bubble water pipeline; 701 - micro-bubble water electromagnetic valve;

[0039] A - raw water inlet; B - water outlet faucet; C - concentrated water outlet. DETAILED DESCRIPTION

[0040] The application will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative only and not limiting of the application. In addition, it should be noted that for the purpose of clarity, only structures related to the application are shown in the drawings and structural details not related to the application have been omitted.

[0041] The term "comprising" and variations thereof as used herein are open-ended, and mean "including but not limited to". The term "based on" means "based, at least in part, on". The term "one embodiment" means "at least one embodiment".

[0042] It should be noted that the terms "first", "second", and so on, mentioned in the present application are only used to distinguish the corresponding contents, and are not used to limit the order or interdependent relationship.

[0043] It should be noted that the modification of "one" or "multiple" mentioned in the present application is illustrative and not limiting, and those skilled in the art should understand that unless otherwise explicitly indicated in the context, it should be understood as "one or more".

[0044] Figure 1 A structural schematic diagram of a water purification system provided by an embodiment of the present application is shown in FIG. 1. As shown in FIG. 1, the water purification system comprises a raw water inlet A, a water outlet faucet B, a concentrated water outlet C, a water quality detection device 503, a concentrated water pipeline 50, a concentrated water electromagnetic valve 501, a concentrated water outlet valve 502, a backflow pipeline 60, a backflow electromagnetic valve 601, a first one-way valve 602, a micro-bubble water pipeline 70, and a micro-bubble water electromagnetic valve 701. Figure 1As shown, the water purification system comprises: a water inlet pipeline 10, a purified water pipeline 20, an air inlet pipeline 30, a reverse osmosis membrane filtration assembly 40 and a control module; a first end of the water inlet pipeline 10 is connected to a raw water inlet A, a second end of the water inlet pipeline 10 is connected to a first water inlet 40a of the reverse osmosis membrane filtration assembly 40; a micro-bubble water generating assembly 101 is arranged on the water inlet pipeline 10, and the micro-bubble water generating assembly 101 is close to the second end of the water inlet pipeline 10; a first end of the purified water pipeline 20 is connected to a first water outlet 40b of the reverse osmosis membrane filtration assembly 40, and a second end of the purified water pipeline 20 is connected to a water outlet faucet B; an air inlet end of the air inlet pipeline 30 is connected to an air pump 301, and an air outlet end of the air inlet pipeline 30 is connected to the water inlet pipeline 10; the water purification system comprises a cleaning mode; in the cleaning mode, the control module controls the air pump 301 to be turned on, and controls a water path between the purified water pipeline 20 and the water inlet pipeline 10 to be disconnected, raw water and air form micro-bubble water after passing through the micro-bubble water generating assembly 101, and the reverse osmosis membrane of the reverse osmosis membrane filtration assembly 40 is cleaned by using the micro-bubble water.

[0045] Specifically, as shown in Figure 1 , the raw water inlet A is a tap water inlet, the water inlet pipeline 10 is a water inlet path of raw water, and unfiltered raw water flows to the first water inlet 40a of the reverse osmosis membrane filtration assembly 40 through the water inlet pipeline 10. In a normal pure water taking mode, the raw water flows to the purified water pipeline 20 from the first water outlet 40b of the reverse osmosis membrane filtration assembly 40 after being filtered by the reverse osmosis membrane filtration assembly 40, and the pure water flows out of the water outlet faucet B after the water outlet faucet B is turned on by a user.

[0046] Continuing to refer to Figure 1 , the micro-bubble water generating assembly 101 is installed in the water inlet pipeline 10 close to the region of the reverse osmosis membrane filtration assembly 40. The air inlet end of the air inlet pipeline 30 is connected to the air pump 301, the air outlet end is connected to the water inlet pipeline 10, and the air outlet end is arranged upstream of the micro-bubble water generating assembly 101. After the air pump 301 is turned on, the air pump 301 can deliver external air to the water inlet pipeline 10, and the air and the raw water in the water inlet pipeline 10 become micro-bubble water after passing through the micro-bubble water generating assembly 101.

[0047] Figure 1 As shown in the embodiment in the

[0048] The micro-bubble water has bubbles with a size of 1-100 microns. The micro-bubble water appears milky white in visual effect due to a large number of small bubbles inside. The micro-bubble water has strong decontamination ability and is widely used in skin cleaning, fruit and vegetable cleaning, and sewage treatment. Based on the above advantages of the micro-bubble water, the reverse osmosis membrane of the reverse osmosis membrane filtration assembly 40 can be cleaned by the micro-bubble water.

[0049] Specifically, when the water purification system is in the cleaning mode, the control module can control the air pump 301 to be turned on and the communication water path between the water inlet pipeline 10 and the purified water pipeline 20 to be disconnected. The disconnection of the communication water path between the water inlet pipeline 10 and the water inlet pipeline 10 means that the water flow cannot flow into the purified water pipeline 20 by using a switch assembly such as a solenoid valve. At the same time, the control module controls the micro-bubble water generating assembly 101 to work and generates micro-bubble water by using the micro-bubble water generating assembly 101. The micro-bubble water flows to the reverse osmosis membrane filtration assembly 40 through the first water inlet 40a and cleans the dirt deposited on the surface of the reverse osmosis membrane by using the micro-bubble water. In this way, the cleaning of the reverse osmosis membrane can be realized without additional cleaning pipeline, the cleaning efficiency is improved while the cleaning effect of the reverse osmosis membrane is ensured, thereby prolonging the service life of the reverse osmosis membrane and ensuring that the filtered pure water has a good taste.

[0050] The second one-way valve 302 is arranged in the air inlet pipeline 30, the inlet of the second one-way valve 302 is close to the air pump 301, and the outlet of the second one-way valve 302 is close to the air outlet end. The second one-way valve 302 is used to prevent the water flow in the water inlet pipeline 10 from flowing back to the air inlet pipeline 30.

[0051] In the embodiment of the present application, the water purification system comprises a water inlet pipeline, a purified water pipeline, an air inlet pipeline, a reverse osmosis membrane filtration assembly and a control module; the first end of the water inlet pipeline is connected to a raw water inlet, and the second end of the water inlet pipeline is connected to the first water inlet of the reverse osmosis membrane filtration assembly; a micro-bubble water generating assembly is arranged on the water inlet pipeline, and the micro-bubble water generating assembly is close to the second end of the water inlet pipeline; the first end of the purified water pipeline is connected to the first water outlet of the reverse osmosis membrane filtration assembly, and the second end of the purified water pipeline is connected to a water outlet faucet; the air inlet end of the air inlet pipeline is connected to an air pump, and the air outlet end of the air inlet pipeline is connected to the water inlet pipeline; the water purification system comprises a cleaning mode; in the cleaning mode, the control module controls the air pump to be turned on and controls the water path between the purified water pipeline and the water inlet pipeline to be disconnected, the raw water and the gas form micro-bubble water after passing through the micro-bubble water generating assembly, and the reverse osmosis membrane of the reverse osmosis membrane filtration assembly is cleaned by using the micro-bubble water. By adopting the above scheme, in the cleaning mode, the micro-bubble water can be introduced into the reverse osmosis membrane filtration assembly, the surface of the reverse osmosis membrane is cleaned by using the micro-bubble water, the cleanliness of the reverse osmosis membrane is ensured, and the service life and the filtering effect of the reverse osmosis membrane filtration assembly are improved. In addition, the above scheme does not need to additionally arrange a cleaning pipeline, and does not need to add a cleaning agent to clean the reverse osmosis membrane, so that the structure of the water purification system and the cleaning process of the reverse osmosis membrane can be simplified, and the cleaning efficiency is improved.

[0052] Optionally, reference can be continuously made to Figure 1 In some embodiments, the water purification system further comprises a concentrated water pipeline 50, the first end of the concentrated water pipeline 50 is connected to the second water outlet 40c of the reverse osmosis membrane filtration assembly 40, the second end of the concentrated water pipeline 50 is connected to a concentrated water outlet C, and the concentrated water pipeline 50 comprises a concentrated water electromagnetic valve 501; the cleaning mode comprises a direct flushing program, in the direct flushing program, the control module controls the air pump 301 and the concentrated water electromagnetic valve 501 to be turned on, and the micro-bubble water is discharged through the concentrated water outlet C after flushing the reverse osmosis membrane.

[0053] Specifically, in the pure water taking mode, the raw water is filtered into pure water with less impurities and concentrated water with more impurities after passing through the reverse osmosis membrane filtration assembly 40, the second water outlet 40c of the reverse osmosis membrane filtration assembly 40 is connected to the concentrated water pipeline 50, the concentrated water electromagnetic valve 501 is electrically connected to the control module, and the control module can control the on-off of the concentrated water pipeline 50 through the concentrated water electromagnetic valve 501; when the concentrated water electromagnetic valve 501 is turned on, the concentrated water can be discharged through the concentrated water pipeline 50.

[0054] In this embodiment, the cleaning mode may include a direct flushing procedure. During the direct flushing procedure, the control module controls the air pump 301 and the concentrate solenoid valve 501 to open, and disconnects the water supply line between the inlet pipe 10 and the purified water pipe 20. Because the concentrate solenoid valve 501 is open, the second outlet 40c of the reverse osmosis membrane filter assembly 40 is connected to the concentrate pipe 50, allowing the microbubble water after cleaning the reverse osmosis membrane to flow into the concentrate pipe 50 and finally discharge from the concentrate outlet C. Thus, after the direct flushing procedure is completed, the reverse osmosis membrane is cleaned, and there is no wastewater residue in the purified water system pipeline.

[0055] Optionally, a concentrate outlet valve 502 may also be installed in the concentrate pipeline 50. The concentrate outlet valve 502 can be installed between the concentrate solenoid valve 501 and the concentrate outlet C. The concentrate outlet valve 502 is electrically connected to the control module and is used to regulate the outlet flow rate.

[0056] Optional, for reference Figure 1 The water purification system may also include a return pipe 60, with one end of the return pipe 60 connected to the concentrate pipe 50 and the second end of the return pipe 60 connected to the inlet pipe 10. The return pipe 60 includes a return solenoid valve 601 and a first check valve 602. The inlet of the first check valve 602 is close to the first end of the return pipe 60, and the outlet of the first check valve 602 is close to the second end of the return pipe 60. The cleaning mode also includes a circulating flushing program. In the circulating flushing program, the control module controls the return solenoid valve 601 to open and controls the concentrate solenoid valve 501 to close. Microbubble water flows in the inlet pipe 10 and the return pipe 60 and circulates to flush the reverse osmosis membrane.

[0057] Specifically, such as Figure 1 As shown, the first end of the return pipe 60 can be connected to the portion of the concentrate pipe 50 between the second outlet 40c of the reverse osmosis membrane filter assembly 40 and the concentrate solenoid valve 501. The second end of the return pipe 60 can be connected to the upstream pipe of the microbubble water generating assembly 101 in the inlet pipe 10. The return solenoid valve 601 and the first check valve 602 can be sequentially installed between the first end and the second end of the return pipe 60. The return solenoid valve 601 is electrically connected to the control module and is used to control the opening and closing of the return pipe 60. The first check valve 602 is used to control the water flow direction in the return pipe 60 so that the first end of the return pipe 60 always faces the second end.

[0058] In the embodiment, the cleaning mode can include the direct flushing program and the circulation flushing program, and the execution order of the direct flushing program and the circulation flushing program is not limited, and can be set by the person skilled in the art according to the actual situation. When the circulation flushing program is executed, the control module controls the backflow electromagnetic valve 601 to open, the concentrated water electromagnetic valve 501 to close, and the micro-bubble water generating assembly 101 to work, and disconnects the communication water path between the water inlet pipeline 10 and the clean water pipeline 20. In addition, the control module can control the air pump 301 to open or close. If the circulation flushing program is executed after the direct flushing program, the air pump 301 can be controlled to be closed in the circulation flushing program, so as to achieve the energy saving effect, because there is gas in the pipeline during the direct flushing program. If the circulation flushing program is executed before the direct flushing program, the air pump 301 can be controlled to be opened in the circulation flushing program, so as to ensure that there is gas in the pipeline.

[0059] In this way, in the circulation flushing program, the micro-bubble water circulates between the water inlet pipeline 10, the reverse osmosis membrane filtering assembly 40, part of the concentrated water pipeline 50, the connection node of the concentrated water pipeline 50 and the backflow pipeline 60, and the backflow pipeline 60. The micro-bubble water circulates to flush the reverse osmosis membrane, continuously flushes the dirt on the surface of the reverse osmosis membrane, and improves the cleaning effect of the reverse osmosis membrane.

[0060] Optionally, the cleaning mode further includes a drainage program, and the drainage program is executed after the circulation flushing program. In the drainage program, the control module controls the concentrated water electromagnetic valve 501 to open and controls the backflow electromagnetic valve 601 to close. The micro-bubble water circulating to flush the reverse osmosis membrane is discharged through the concentrated water outlet C.

[0061] Further, in an exemplary embodiment, the direct flushing program can be executed first and then the circulation flushing program. In this setting mode, the cleaning mode includes the direct flushing program, the circulation flushing program and the drainage program. After the circulation flushing program is executed, the control module controls the concentrated water electromagnetic valve 501 to open, the backflow electromagnetic valve 601 to close, and the micro-bubble water generating assembly 101 to stop working. The sewage after cleaning is discharged from the concentrated water outlet C.

[0062] Of course, in some other embodiments, the circulation flushing program can be executed first and then the direct flushing program. Because the sewage for cleaning the reverse osmosis membrane is directly discharged in the direct flushing program, the drainage program can not be set at this time, and the cleaning mode is composed of the circulation flushing program and the direct flushing program.

[0063] The embodiments of the present application all take the cleaning mode including both the direct flushing program and the circulating flushing program as an example, and are not limited to this. In other embodiments not shown, the cleaning mode can only include one flushing program. The advantage of setting the cleaning mode to include two flushing programs in the present embodiment is that the direct flushing program can directly discharge the sewage after cleaning, so that there is no dirt deposition in the pipeline, and the circulating flushing program can continuously flush the reverse osmosis membrane, saving water while ensuring the cleaning effect. In addition, in a more refined embodiment, the direct flushing program can be executed first and then the circulating flushing program. When the reverse osmosis membrane is first cleaned, there is more dirt on the surface of the reverse osmosis membrane and more dirt in the micro-bubble water. The direct flushing program is executed first to discharge the sewage with more dirt, and then the circulating flushing program is used to flush the reverse osmosis membrane with relatively clean micro-bubble water, which is beneficial to improve the cleaning effect.

[0064] Optionally, reference can be made to Figure 1 The concentrated water pipeline 50 further includes a water quality detection device 503, and the water quality detection device 503 and the concentrated water electromagnetic valve 501 are sequentially arranged in the communication path between the first end and the second end of the concentrated water pipeline 50; the water quality detection device 503 is used to detect the impurity parameter in the water; the control module is further electrically connected with the water quality detection device 503, and the control module is further used to obtain the impurity parameter detected by the water quality detection device 503, and control the water purification system to enter the cleaning mode when the impurity parameter is greater than the impurity parameter threshold.

[0065] As shown in Figure 1 The water quality detection device 503 can be arranged in the concentrated water pipeline 50 between the second water outlet 40c of the reverse osmosis membrane filtration assembly 40 and the backflow pipeline 60. The water quality detection device 503 can detect the impurity content in the water (micro-bubble water or concentrated water) flowing therethrough to generate an impurity parameter, and the impurity parameter is transmitted to the control module. It can be understood that when the water purification system is used in the pure water taking mode, if the impurity parameter detected by the water quality detection device 503 is very large (for example, exceeds the impurity parameter threshold), it indicates that the impurity content in the concentrated water exceeds the normal range. At this time, the control module can judge that the surface of the reverse osmosis membrane is seriously blocked, and the reverse osmosis membrane needs to be cleaned, and then the control module can control the water purification system to enter the cleaning mode.

[0066] In the present embodiment, the impurity parameter detected by the water quality detection device 503 is used as the basis for judging whether to enter the cleaning mode, the performance of the reverse osmosis membrane cleaning work is matched with the actual use state of the reverse osmosis membrane, and the intelligent automatic cleaning of the water purification system can be realized.

[0067] Optionally, the specific type of the water quality detection device 503 is not limited, for example, it can be a total organic carbon (TOC) sensor, a chemical oxygen demand (COD) sensor, a turbidity sensor, or a conductivity probe, but is not limited thereto, and any device capable of detecting the impurity content in water is within the scope of the technical solutions protected by the embodiments of the present application.

[0068] Correspondingly, when the type of the water quality detection device 503 is different, the water quality parameters are also different. For example, the water quality parameter detected by the TOC sensor is the TOC parameter, which refers to the total amount of carbon in the dissolved and suspended organic matter in the water body, the water quality parameter detected by the COD sensor is the COD parameter, which refers to the amount of oxidizing agent consumed by the reducing substances in the water that are easily oxidized by strong oxidizing agents, and so on. The present application will not be described in detail one by one. The greater the impurity parameter detected by the above-mentioned water quality detection device 503, the more impurities in the water.

[0069] Further optionally, some embodiments of the present application also propose that in the cleaning mode, the control module can switch the programs in combination with the impurity parameter detected by the water quality detection device 503.

[0070] For example, the control module is also used to control the water purification system to enter the direct flushing program when the impurity parameter is greater than the impurity parameter threshold, and to enter the cycle flushing program after the direct flushing program is executed for a preset flushing duration. In the cycle flushing program, the control module is also used to control the water purification system to enter the drainage program when the increasing rate of the impurity parameter is less than or equal to the first increasing rate threshold, and to enter the direct flushing program again after the drainage program is executed for a preset drainage duration, and to cycle execute the direct flushing program, the cycle flushing program, and the drainage program. In the cleaning mode, the control module is also used to control the concentrated water electromagnetic valve 501 to be opened and the backflow electromagnetic valve 601 to be closed when the increasing rate of the impurity parameter is less than or equal to the second increasing rate threshold, and to end the cleaning mode after the micro-bubble water is discharged.

[0071] Specifically, in the present embodiment, the cleaning mode includes the direct flushing program, the cycle flushing program, and the drainage program, which are executed in sequence and cycle. When the water quality detection device 503 detects that the water quality parameter is greater than the impurity parameter threshold, the control module controls the water purification system to enter the direct flushing program. In the direct flushing program, the control logic described above is used to control the components inside the water purification system, so as to directly flush the reverse osmosis with the micro-bubble water.

[0072] After the direct flushing program is executed for a preset flushing duration, that is, after the reverse osmosis membrane is directly flushed with the micro-bubble water for a preset flushing duration, the control module controls the water purification system to enter the cycle flushing program. In the cycle flushing program, the control logic described above is used to control the components inside the water purification system, so as to cycle flush the reverse osmosis with the micro-bubble water.

[0073] It can be understood that in the circulating flushing program, the microbubble water continuously flushes the surface of the reverse osmosis membrane, the dirt on the surface of the reverse osmosis membrane is reduced, the dirt in the microbubble water gradually increases, and the impurity parameter value detected by the water quality detection device 503 continuously increases. And with the progress of the circulating flushing program, the dirt on the surface of the reverse osmosis membrane is reduced, and the rate at which the dirt in the microbubble water increases will gradually decrease. Based on this, the embodiment of the present application further proposes that under the circulating flushing program, the control module can take the increase rate of the water quality parameter detected by the water quality detection sensor as the basis for whether to switch to the next program.

[0074] Specifically, a first increase rate threshold can be preset in the control module, and the first increase rate threshold is a small impurity increase rate value. During the execution of the circulating flushing program, when the increase rate of the impurity parameter is less than or equal to the first increase rate threshold, it indicates that the cleaning effect of the microbubble water in the current pipeline on the reverse osmosis membrane is limited. The control module can end the current circulating flushing program and control the water purification system to enter the drainage program. Under the drainage program, the control logic described above is used to control the various components inside the water purification system to drain the sewage.

[0075] After the drainage program is executed for a preset time length, that is, after the sewage is drained for a preset drainage time length, the control module can control the water purification system to enter the direct flushing program again, and execute the direct flushing program, the circulating program and the drainage program again according to the above steps, and cycle the above three programs. In this way, the cleaning effect of the reverse osmosis membrane can be improved.

[0076] Further, during the execution of the program cycle, if the increase rate of the impurity parameter detected by the water quality detection device 503 is very small, it indicates that there is basically no new dirt in the microbubble water, that is, there is basically no dirt on the surface of the reverse osmosis membrane. Based on this, a second increase rate threshold can be preset in the control module, and the second increase rate threshold is a very small impurity increase rate value. When the increase rate of the real-time detected impurity parameter is less than or equal to the second increase rate threshold, it indicates that the reverse osmosis membrane has been cleaned, at which time the control module controls the water purification system to execute the drainage program, controls the backflow electromagnetic valve 601 to be closed and the concentrated water electromagnetic valve 501 to be opened, so as to drain the microbubble water used for cleaning. After the microbubble water is drained, the cleaning mode is ended, and the reverse osmosis membrane cleaning work of this time is ended.

[0077] The specific values of the above-mentioned impurity parameter threshold, the preset flushing time length, the first increase rate threshold, the preset drainage time length and the second increase rate threshold can be set by those skilled in the art according to the actual situation and pre-stored in the control module, and the embodiments of the present application are not limited. For example, since the impurity parameter threshold is related to the local water quality, the specific value is not limited; the preset flushing time length can be less than 60s, preferably 10-30s; the preset drainage time length can be less than 60s, preferably 10-30s; the first increase rate threshold Δk1 can be in the range of 0<Δk1≤10(mg·L-1 ·s -1 ), the second speed-up threshold Δk2 can be in the range of 0≤Δk2≤1 (mg·L -1 ·s -1 ).

[0078] It is worth mentioning that in the embodiment, the control module determines when to end the cleaning mode according to the increase rate of the impurity parameter in water, and the determination basis is not directly related to the specific value of the impurity parameter in water, and the difference in the value of the impurity parameter in water caused by different water qualities in different regions does not need to be considered, and the determination logic can be generally used in different regions.

[0079] Optionally, referring to Figure 1 , the water inlet pipeline 10 includes a first filter element 102, a water inlet electromagnetic valve 103, a gas dissolving tank 104, and a booster pump 105; the first filter element 102, the water inlet electromagnetic valve 103, the gas dissolving tank 104, and the booster pump 105 are sequentially arranged in the communication path between the raw water inlet A and the micro-bubble water generating assembly 101; in the direct flushing program, the control module further controls the water inlet electromagnetic valve 103 and the booster pump 105 to be opened; in the circulating flushing program, the control module further controls the booster pump 105 to be opened and the water inlet electromagnetic valve 103 to be closed; and in the drainage program, the control module further controls the water inlet electromagnetic valve 103 and the booster pump 105 to be opened.

[0080] Specifically, as shown in Figure 1 , the first filter element 102, the water inlet electromagnetic valve 103, the gas dissolving tank 104, and the booster pump 105 can be sequentially installed between the raw water inlet A and the micro-bubble water generating assembly 101. The first filter element 102 is a pretreatment filter element for coarsely filtering the raw water. The water inlet electromagnetic valve 103 and the booster pump 105 are electrically connected with the control module, and the water inlet electromagnetic valve 103 is used to control the opening and closing of the water inlet pipeline 10. The gas dissolving tank 104 is used to mix the gas and water in the water inlet pipeline 10, so that the gas and water are uniformly mixed, and the gas is prevented from entering the booster pump 105 to cause the booster pump 105 to be blocked by gas. The booster pump 105 is used to pressurize the water. The gas outlet end of the gas inlet pipeline 30 and the second end of the backflow pipeline 60 can be connected to the water inlet pipeline 10 between the water inlet electromagnetic valve 103 and the gas dissolving tank 104.

[0081] Of course, the positions of the components in the above water inlet pipeline 10 are only examples, and in actual application, the positions of the components can be adjusted according to actual needs.

[0082] In the direct flushing program of the cleaning mode, the control module can specifically control the opening of the water inlet electromagnetic valve 103, the air pump 301, the booster pump 105, the concentrated water electromagnetic valve 501, and the concentrated water outlet valve 502, the closing of the backflow electromagnetic valve 601, the disconnection of the water path between the water inlet pipeline 10 and the clean water pipeline 20, and the working of the micro-bubble water generating assembly 101. In the circulating flushing program of the cleaning mode, the control module can specifically control the opening of the booster pump 105 and the backflow electromagnetic valve 601, the closing of the water inlet electromagnetic valve 103, the air pump 301, the concentrated water electromagnetic valve 501, and the concentrated water outlet valve 502, the disconnection of the water path between the water inlet pipeline 10 and the clean water pipeline 20, and the working of the micro-bubble water generating assembly 101. In the drainage program of the cleaning mode, the control module can specifically control the opening of the water inlet electromagnetic valve 103, the booster pump 105, the concentrated water electromagnetic valve 501, and the concentrated water outlet valve 502, the closing of the air pump 301 and the backflow electromagnetic valve 601, the disconnection of the water path between the water inlet pipeline 10 and the clean water pipeline 20, and the stopping of the micro-bubble water generating assembly 101.

[0083] Optionally, reference can be continued to Figure 1 The water inlet pipeline 10 can further include a water-gas ratio adjusting mechanism 106, which can be arranged between the first filter element 102 and the water inlet electromagnetic valve 103. The water-gas ratio adjusting mechanism 106 is used to control the distribution ratio of water and gas in the downstream water inlet pipeline 10.

[0084] For example, the water-gas ratio adjusting mechanism 106 can include a flow control valve 1061 and a pressure reducing valve 1062 arranged in parallel. The flow control valve 1061 can be a stepper motor, but is not limited thereto. The flow control valve 1061 can be electrically connected to the control module, and the control module can adjust the distribution ratio of water in the parallel pipeline by changing the opening of the flow control valve 1061. The greater the opening of the flow control valve 1061, the greater the water flow through the flow control valve 1061 to the water inlet electromagnetic valve 103; the smaller the opening of the flow control valve 1061, the smaller the water flow through the flow control valve 1061 to the water inlet electromagnetic valve 103. The greater the water flow through the flow control valve 1061 to the water inlet electromagnetic valve 103, the greater the pressure in the water inlet pipeline 10 upstream of the dissolved air tank 104, and the gas is less likely to enter the water inlet pipeline 10, and vice versa.

[0085] Based on the above structure, when the water purification system is in the direct flushing program, the control module can adjust the flow control valve 1061 to a preset opening range, in which the water flow through the flow control valve 1061 is moderate, so that the pressure in the downstream water inlet pipeline 10 is moderate, ensuring that the gas can enter the water inlet pipeline 10. When the water purification system is in the cycle flushing program, the control module can control the flow control valve 1061 to be closed. When the water purification system is in the drainage program, the control module can adjust the flow control valve 1061 to the maximum opening, so that the raw water has a large pressure to flow to the downstream pipeline, ensuring the sewage discharge effect.

[0086] Optionally, a pressure detection component 107 can be further arranged between the water inlet electromagnetic valve 103 and the dissolved air tank 104, and the pressure detection component 107 is used to detect the pump front pressure, that is, the water pressure in the downstream water inlet pipeline 10 of the flow control valve 1061 mentioned above. The pressure detection component 107 can be a pressure gauge, but is not limited thereto.

[0087] Optionally, referring to Figure 1 , the micro-bubble water generating assembly 101 can include a bubbling electromagnetic valve 1011, which includes an open state and a closed state. In the open state, the raw water remains unchanged after passing through the bubbling electromagnetic valve 1011, and in the closed state, the raw water forms micro-bubble water after passing through the bubbling electromagnetic valve 1011. In the direct flushing program and the cycle flushing program, the control module is further used to control the bubbling electromagnetic valve 1011 to be in the closed state; and in the drainage program, the control module is further used to control the bubbling electromagnetic valve 1011 to be in the open state.

[0088] Specifically, the bubbling electromagnetic valve 1011 is an integrated assembly of a bubbler and an electromagnetic valve, for example, the bubbler can be installed in the internal passage of the electromagnetic valve. When the bubbling electromagnetic valve 1011 is opened, the water flow directly flows through the bubbling electromagnetic valve 1011 without passing through the bubbler, and the water flow remains in the raw water form. When the bubbling electromagnetic valve 1011 is closed, the water flow passes through the bubbler and forms micro-bubble water under the action of the bubbler. The specific structure of the bubbler is the same as that in the prior art, which will not be described or limited here. In this embodiment, the bubbler and the electromagnetic valve are integrated as the micro-bubble water generating assembly 101, which can simplify the structure of the water purification system.

[0089] Based on the structure of the micro-bubble water generating assembly 101, the control of the micro-bubble water generating assembly 101 mentioned in the above embodiment is to control the bubbling electromagnetic valve 1011 to be closed, and the raw water becomes micro-bubble water after passing through the bubbling electromagnetic valve 1011. The stop of the micro-bubble water generating assembly 101 is to control the bubbling electromagnetic valve 1011 to be opened, and the raw water directly flows through the bubbling electromagnetic valve 1011.

[0090] Of course, in other embodiments, the microbubble water generating assembly 101 can include a solenoid valve and a bubbler, which are arranged in parallel. When performing the direct flushing program and the circulating flushing program, the control module controls the solenoid valve to be closed, and the raw water flows to the pipeline where the bubbler is located; when performing the drainage program and the pure water taking mode, the control module controls the solenoid valve to be opened, and the raw water flows to the pipeline where the solenoid valve is located.

[0091] Optionally, the above description can be continued with reference to Figure 1 , the water purification pipeline 20 includes a second filter cartridge 201 and a water purification solenoid valve 202, which are arranged in the communication path between the first end and the second end of the water purification pipeline 20 in sequence; the water purification system further includes a pure water taking mode, in which the control module controls the water inlet solenoid valve 103, the booster pump 105, the bubbling solenoid valve 1011, the water purification solenoid valve 202 and the concentrated water solenoid valve 501 to be opened, and the raw water flows to the reverse osmosis membrane filtration assembly 40; wherein part of the raw water becomes pure water after being filtered by the reverse osmosis membrane filtration assembly 40, and the pure water flows out through the water outlet faucet B, and the other part of the raw water becomes concentrated water, which is discharged through the concentrated water outlet C.

[0092] Specifically, as shown in Figure 1 , the second filter cartridge 201 and the water purification solenoid valve 202 can be arranged in sequence between the reverse osmosis membrane filtration assembly 40 and the water outlet faucet B, the second filter cartridge 201 is a post-treatment filter cartridge, which is used for filtering the pure water entering the water purification system again to improve the taste of the pure water. The water purification solenoid valve 202 is electrically connected with the control module, and is used for controlling the on-off between the water inlet pipeline 10 and the water purification pipeline 20. When the water purification solenoid valve 202 is opened, the first water outlet 40b of the reverse osmosis membrane filtration assembly 40 is in communication with the water outlet faucet B, and the pure water can flow to the water outlet faucet B; when the water purification solenoid valve 202 is closed, the first water outlet 40b of the reverse osmosis membrane filtration assembly 40 is not in communication with the water outlet faucet B, that is, the water path between the water inlet pipeline 10 and the water purification pipeline 20 is disconnected.

[0093] In this arrangement, when the water purification system is in the cleaning mode, the control module can control the water purification solenoid valve 202 to be closed to disconnect the water path between the water purification pipeline 20 and the water purification pipeline 20.

[0094] When the water purification system is in the pure water taking mode, the control module can control the water inlet electromagnetic valve 103, the booster pump 105, the bubbling electromagnetic valve 1011, the pure water electromagnetic valve 202, the concentrated water electromagnetic valve 501 and the concentrated water outlet valve 502 to be opened, the backflow electromagnetic valve 601 and the air pump 301 to be closed, and the flow control valve 1061 to be adjusted to the maximum opening degree. The raw water is filtered by the reverse osmosis membrane filtration assembly 40 to become pure water and concentrated water, the pure water flows to the pure water pipeline 20 through the first water outlet 40b, and when the user twists the water outlet faucet B, the pure water flows out of the water outlet faucet B; the concentrated water flows to the concentrated water pipeline 50 through the second water outlet 40c, and is finally discharged to the sewer through the concentrated water outlet C.

[0095] Optionally, the water purification system can further comprise any structural component known to those skilled in the art, and the present application does not limit the same. Figure 1 The water purification system can further comprise a micro-bubble water pipeline 70, a first end of the micro-bubble water pipeline 70 being connected to the water inlet pipeline 10, and a second end of the micro-bubble water pipeline 70 being connected to the water outlet faucet B. Specifically, the first end of the micro-bubble water pipeline 70 can be connected to the water inlet pipeline 10 between the bubbling electromagnetic valve 1011 and the reverse osmosis membrane filtration assembly 40. The micro-bubble water pipeline 70 comprises a micro-bubble water electromagnetic valve 701, which is used to control the opening and closing of the micro-bubble water pipeline 70.

[0096] The micro-bubble water electromagnetic valve 701 is electrically connected to the control module, and the water purification system further comprises a micro-bubble water taking mode. When the user needs to take micro-bubble water, the control module controls the water purification system to enter the micro-bubble water taking mode, and specifically controls the water inlet electromagnetic valve 103, the booster pump 105, the air pump 301 and the micro-bubble water electromagnetic valve 701 to be opened, the pure water electromagnetic valve 202, the backflow electromagnetic valve 601, the concentrated water electromagnetic valve 501 and the bubbling electromagnetic valve 1011 to be closed, and the flow control valve 1061 to be adjusted to a preset opening degree range (to ensure that the pressure value at the pressure detection assembly 107 is in a preset pressure value range). The raw water is coarsely filtered by the first filter element 102, enters the air dissolving tank 104 after being decompressed by the water-air ratio adjusting mechanism 106, the external air enters the air dissolving tank 104 after passing through the air pump 301 and the second one-way valve 302, and is dissolved in the water by the air dissolving tank 104; the water-air mixture is pressurized by the booster pump 105, the pressure is released by the bubbling electromagnetic valve 1011 to generate micro-bubble water, and the micro-bubble water flows out of the water outlet faucet B through the micro-bubble water electromagnetic valve 701.

[0097] Optionally, the water purification system provided by the embodiment of the present application can further comprise any structural component known to those skilled in the art, and the present application does not limit the same.

[0098] Based on the same concept, the embodiment of the present application further provides a control method of a water purification system, which is suitable for the water purification system provided by any embodiment of the present application, and the structure of the water purification system can refer to the above-mentioned embodiments and the accompanying drawings. Figure 2The control method can be executed by a control module in the water purification system, and the control method of the water purification system includes: in the cleaning mode, the air pump 301 is controlled to be turned on, and the water path between the purified water pipeline 20 and the water inlet pipeline 10 is controlled to be disconnected, raw water and gas form micro-bubble water after passing through the micro-bubble water generating assembly 101, and the micro-bubble water is used to clean the reverse osmosis membrane of the reverse osmosis membrane filtration assembly 40.

[0099] By adopting the above scheme, in the cleaning mode, the micro-bubble water can be introduced into the reverse osmosis membrane filtration assembly 40, and the reverse osmosis membrane surface is cleaned by using the micro-bubble water, so that the cleanliness of the reverse osmosis membrane is ensured, and the service life and the filtering effect of the reverse osmosis membrane filtration assembly 40 are improved. In addition, the above scheme does not need to additionally set a cleaning pipeline, and does not need to add a cleaning agent to clean the reverse osmosis membrane, so that the structure of the water purification system and the cleaning process of the reverse osmosis membrane can be simplified, and the cleaning efficiency is improved.

[0100] The control method of the water purification system provided in the embodiments of the present application includes all the technical features and corresponding beneficial effects of the water purification system provided in the embodiments of the present application, and details are not repeated here. The contents not explained in detail in the embodiments corresponding to the control method can be referred to the embodiments corresponding to the water purification system.

[0101] Optionally, when the water purification system includes the concentrated water pipeline 50, the control method can be refined as follows: in the cleaning mode, the air pump 301 and the concentrated water electromagnetic valve 501 are controlled to be turned on, the micro-bubble water generating assembly 101 is controlled to work, and the water path between the water inlet pipeline 10 and the purified water pipeline 20 is controlled to be disconnected, and a direct flushing program is executed.

[0102] Further optionally, when the water purification system further includes the backflow pipeline 60, the control method can be refined as follows: step one, in the cleaning mode, the air pump 301 and the concentrated water electromagnetic valve 501 are controlled to be turned on, the micro-bubble water generating assembly 101 is controlled to work, and the water path between the water inlet pipeline 10 and the purified water pipeline 20 is controlled to be disconnected, and a direct flushing program is executed; step two, the backflow electromagnetic valve 601 is controlled to be turned on, the concentrated water electromagnetic valve 501 is controlled to be turned off, the micro-bubble water generating assembly 101 is controlled to work, and the water path between the water inlet pipeline 10 and the purified water pipeline 20 is controlled to be disconnected, and a circulating flushing program is executed.

[0103] Further, in some embodiments, the water purification system can further include a drainage program, and the drainage program is executed after the circulating flushing program. Figure 2 A flowchart of a control method of a water purification system provided in the embodiments of the present application is shown in FIG. 6. Figure 2 The control method shown in FIG. 6 is further refined on the basis of the above embodiments, and the control method includes the following steps. Figure 1 The control method shown in FIG. 6 is further refined on the basis of the above embodiments, and the control method includes the following steps.

[0104] S110, in the cleaning mode, the air pump 301 and the concentrated water electromagnetic valve 501 are controlled to be opened, the micro-bubble water generating assembly 101 is controlled to work, the water path between the water inlet pipeline 10 and the clean water pipeline 20 is controlled to be disconnected, and the direct flushing program is executed.

[0105] S120, the backflow electromagnetic valve 601 is controlled to be opened, the concentrated water electromagnetic valve 501 is controlled to be closed, the micro-bubble water generating assembly 101 is controlled to work, the water path between the water inlet pipeline 10 and the clean water pipeline 20 is controlled to be disconnected, and the circulating flushing program is executed.

[0106] S130, the concentrated water electromagnetic valve 501 is controlled to be opened, the backflow electromagnetic valve 601 is controlled to be closed, and the water path between the water inlet pipeline 10 and the clean water pipeline 20 is controlled to be disconnected, and the micro-bubble water circulating the reverse osmosis membrane is discharged from the concentrated water outlet C.

[0107] In the drainage program, the concentrated water electromagnetic valve 501 is controlled to be opened, the backflow electromagnetic valve 601 is controlled to be closed, and the micro-bubble water generating assembly 101 is controlled to stop working, and the cleaned sewage is discharged from the concentrated water outlet C.

[0108] Optionally, with reference to the above description Figure 1 , the water quality detection device 503 can also be included in the concentrated water pipeline 50, and the specific setting mode of the water quality detection device 503 is the same as that of the above embodiment, which will not be described here. Before the above (S110), the following steps can also be performed: obtaining the impurity parameter detected by the water quality detection device 503; when the impurity parameter is greater than the impurity parameter threshold, controlling the clean water system to enter the cleaning mode.

[0109] Further alternatively, the above-mentioned "controlling the water purification system to enter the cleaning mode when the impurity parameter is greater than the impurity parameter threshold value" can be refined as: controlling the water purification system to enter a direct flushing program when the impurity parameter is greater than the impurity parameter threshold value. (S110) can be refined as: in the direct flushing program, controlling the air pump 301 and the concentrated water electromagnetic valve 501 to be opened, the micro-bubble water generating assembly 101 to work, and the water path between the water inlet pipeline 10 and the purified water pipeline 20 to be disconnected. After (S110), it can also be executed: after the direct flushing program is executed for a preset flushing duration, entering a circulating flushing program. (S120) can be refined as: in the circulating flushing program, controlling the backflow electromagnetic valve 601 to be opened, the concentrated water electromagnetic valve 501 to be closed, the micro-bubble water generating assembly 101 to work, and the water path between the water inlet pipeline 10 and the purified water pipeline 20 to be disconnected. After (S120), it can also be executed: when the increasing rate of the impurity parameter is less than or equal to a first increasing rate threshold value, controlling the water purification system to enter a drainage program. (S130) can be refined as: in the drainage program, controlling the concentrated water electromagnetic valve 501 to be opened, and the backflow electromagnetic valve 601 to be closed, and the micro-bubble water circulating through the reverse osmosis membrane in the circulating flushing program is discharged through the concentrated water outlet C. After (S130), it can also be executed: after the drainage program is executed for a preset drainage duration, entering the direct flushing program again, and repeatedly executing the direct flushing program, the circulating flushing program and the drainage program. The control method can also include: when the increasing rate of the impurity parameter is less than or equal to a second increasing rate threshold value, controlling the concentrated water electromagnetic valve 501 to be opened, and the backflow electromagnetic valve 601 to be closed, and ending the cleaning mode after discharging the micro-bubble water.

[0110] Optionally, the water inlet pipeline 10 further includes a first filter element 102, a water inlet electromagnetic valve 103, a gas dissolving tank 104 and a booster pump 105. (S110) in the above-mentioned embodiments can be refined as: controlling the water inlet electromagnetic valve 103, the air pump 301, the booster pump 105, the concentrated water electromagnetic valve 501 and the concentrated water outlet valve 502 to be opened, the backflow electromagnetic valve 601 to be closed, the water path between the water inlet pipeline 10 and the purified water pipeline 20 to be disconnected, and the micro-bubble water generating assembly 101 to work. (S120) can be refined as: controlling the booster pump 105 and the backflow electromagnetic valve 601 to be opened, controlling the water inlet electromagnetic valve 103, the air pump 301, the concentrated water electromagnetic valve 501 and the concentrated water outlet valve 502 to be closed, and controlling the water path between the water inlet pipeline 10 and the purified water pipeline 20 to be disconnected, and the micro-bubble water generating assembly 101 to work. (S130) can be refined as: controlling the water inlet electromagnetic valve 103, the booster pump 105, the concentrated water electromagnetic valve 501 and the concentrated water outlet valve 502 to be opened, controlling the air pump 301 and the backflow electromagnetic valve 601 to be closed, the water path between the water inlet pipeline 10 and the purified water pipeline 20 to be disconnected, and the micro-bubble water generating assembly 101 to stop working.

[0111] Optionally, the above-mentioned embodiments can be continued to refer to Figure 1The water inlet pipeline 10 can further include a water-air ratio adjusting mechanism 106. The micro-bubble water generating assembly 101 can include a bubbling electromagnetic valve 1011. The specific arrangement of the water-air ratio adjusting mechanism 106 and the bubbling electromagnetic valve 1011 can refer to the above embodiments, which will not be described here. Based on the structure of the water purification system, the operation of the micro-bubble water generating assembly 101 in the above embodiments can be specifically refined as follows: the bubbling electromagnetic valve 1011 is controlled to be in a closed state, and the raw water is filtered into micro-bubble water by the bubbling electromagnetic valve 1011; and the stop of the micro-bubble water generating assembly 101 in the above embodiments can be specifically refined as follows: the bubbling electromagnetic valve 1011 is controlled to be in an open state, and the raw water remains unchanged in form by the bubbling electromagnetic valve 1011.

[0112] Optionally, the above embodiments can be continued to refer to Figure 3 The water purification pipeline 20 further includes a second filter element 201 and a purified water electromagnetic valve 202, and the water purification system can further include a micro-bubble water pipeline 70. The specific arrangement of the micro-bubble water pipeline 70, the second filter element 201 and the purified water electromagnetic valve 202 can refer to the above embodiments, which will not be described here. The water purification system can further include a pure water water-taking mode and a micro-bubble water water-taking mode. In the pure water water-taking mode, the inlet electromagnetic valve 103, the booster pump 105, the bubbling electromagnetic valve 1011, the purified water electromagnetic valve 202, the concentrated water electromagnetic valve 501 and the concentrated water outlet valve 502 are controlled to be opened, the backflow electromagnetic valve 601 and the air pump 301 are controlled to be closed, and the flow control valve 1061 is controlled to be adjusted to the maximum opening degree. In the micro-bubble water water-taking mode, the inlet electromagnetic valve 103, the booster pump 105, the air pump 301 and the micro-bubble water electromagnetic valve 701 are controlled to be opened, the backflow electromagnetic valve 601, the concentrated water electromagnetic valve 501 and the bubbling electromagnetic valve 1011 are controlled to be closed, and the flow control valve 1061 is controlled to be adjusted to a preset opening degree range.

[0113] Figure 3 The control logic diagram of the control method of the water purification system provided in the embodiments of the present application is as follows, which will be described below in combination with Figure 3 A specific embodiment provided in the present application is introduced.

[0114] As shown in ​ , first, the water purification system is started;

[0115] In the pure water water-taking mode, the inlet electromagnetic valve 103, the booster pump 105, the bubbling electromagnetic valve 1011, the purified water electromagnetic valve 202, the concentrated water electromagnetic valve 501 and the concentrated water outlet valve 502 are controlled to be opened, the backflow electromagnetic valve 601 and the air pump 301 are controlled to be closed, and the flow control valve 1061 is controlled to be adjusted to the maximum opening degree. The raw water becomes pure water and concentrated water after being filtered by the reverse osmosis membrane filtration assembly 40, the pure water flows to the purified water pipeline 20 through the first outlet 40b, and the pure water flows out of the water outlet faucet B when the water outlet faucet B is opened by a user; the concentrated water flows to the concentrated water pipeline 50 through the second outlet 40c, and is finally discharged to the sewer through the concentrated water outlet C.

[0116] In the micro-bubble water water taking mode, the water inlet electromagnetic valve 103, the booster pump 105, the air pump 301 and the micro-bubble water electromagnetic valve 701 are opened, the backflow electromagnetic valve 601, the concentrated water electromagnetic valve 501 and the bubbling electromagnetic valve 1011 are closed, and the flow control valve 1061 is adjusted to a preset opening range. The raw water is coarsely filtered through the first filter element 102, enters the air dissolving tank 104 after being decompressed by the water-air ratio adjusting mechanism 106, the external air enters the air dissolving tank 104 after passing through the air pump 301 and the second one-way valve 302, and is dissolved in the water by the air dissolving tank 104. The water-air mixture is pressurized by the booster pump 105, the pressure is released by the bubbling electromagnetic valve 1011 to generate micro-bubble water, and the micro-bubble water flows out from the water outlet faucet B through the micro-bubble water electromagnetic valve 701.

[0117] When the impurity parameter is greater than the impurity parameter threshold value, the water purification system is controlled to enter the cleaning mode. In the cleaning mode, the water inlet electromagnetic valve 103, the air pump 301, the booster pump 105, the concentrated water electromagnetic valve 501 and the concentrated water outlet valve 502 are first opened, and the remaining components are closed to execute the direct flushing program. Further, after the direct flushing program is executed for a preset flushing time, the booster pump 105 and the backflow electromagnetic valve 601 are opened, and the remaining components are closed to execute the cycle flushing program. Then it can be judged whether the increasing rate of the impurity parameter is less than or equal to the first increasing rate threshold value. When the increasing rate of the impurity parameter is less than or equal to the first increasing rate threshold value, the water purification system is controlled to enter the drainage program. When the increasing rate of the impurity parameter is greater than the first increasing rate threshold value, the cycle flushing program is continuously executed. In the drainage program, the water inlet electromagnetic valve 103, the booster pump 105, the bubbling electromagnetic valve 1011, the concentrated water electromagnetic valve 501 and the concentrated water outlet valve 502 are opened, and the opening of the flow control valve 1061 is adjusted to the maximum, and the remaining components are closed. After the drainage program is executed for a preset drainage time, the direct flushing program, the cycle flushing program and the drainage program are executed again. Before executing the next direct flushing program, it can be judged whether the increasing rate of the impurity parameter is less than or equal to the second increasing rate threshold value. If yes, the drainage program is entered again to end the cleaning mode after the micro-bubble water is drained. If no, the direct flushing program is continuously executed.

[0118] Note that the above are only the preferred embodiments of the present application and the principles of the technology applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A water purification system, characterized in that, It includes inlet water pipes, purified water pipes, air inlet pipes, reverse osmosis membrane filter components, and control modules; The first end of the water inlet pipe is connected to the raw water inlet, and the second end of the water inlet pipe is connected to the first water inlet of the reverse osmosis membrane filtration assembly; a microbubble water generating assembly is provided on the water inlet pipe, and the microbubble water generating assembly is located near the second end of the water inlet pipe; The first end of the water purification pipeline is connected to the first outlet of the reverse osmosis membrane filter assembly, and the second end of the water purification pipeline is connected to the water faucet; the air inlet end of the air inlet pipeline is connected to the air pump, and the air outlet end of the air inlet pipeline is connected to the water inlet pipeline. The water purification system includes a cleaning mode; in the cleaning mode, the control module controls the air pump to turn on and controls the water circuit between the purified water pipeline and the inlet water pipeline to be disconnected. The raw water and gas form microbubble water after passing through the microbubble water generating component, and the microbubble water is used to clean the reverse osmosis membrane of the reverse osmosis membrane filtration component. The water purification system also includes a concentrate pipeline, the first end of which is connected to the second outlet of the reverse osmosis membrane filter assembly, and the second end of which is connected to the concentrate outlet. The concentrate pipeline includes a concentrate solenoid valve. The concentrate pipeline also includes a water quality testing device, and the water quality testing device and the concentrate solenoid valve are sequentially arranged in the communication path between the first end and the second end of the concentrate pipeline; the water quality testing device is used to detect impurity parameters in the water; The control module is also electrically connected to the water quality testing device. The control module is also used to acquire the impurity parameters detected by the water quality testing device, and when the impurity parameters are greater than the impurity parameter threshold, control the water purification system to enter the cleaning mode. The cleaning modes include a direct rinsing program, a circulating rinsing program, and a drainage program; The control module is also used to control the water purification system to enter the direct flushing program when the impurity parameter is greater than the impurity parameter threshold, and to enter the circulating flushing program after the direct flushing program has been executed for a preset flushing time. In the cyclic flushing program, the control module is also used to control the water purification system to enter the drainage program when the increase rate of the impurity parameter is less than or equal to the first growth rate threshold, and after the drainage program has been executed for a preset drainage time, to re-enter the direct flushing program, and to cycle through the direct flushing program, the cyclic flushing program, and the drainage program. Before executing the next direct rinsing procedure, the control module is also configured to control the concentrated water solenoid valve to open and the return solenoid valve to close when the rate of increase of the impurity parameter is less than or equal to the second growth rate threshold, thereby discharging the microbubble water and ending the cleaning mode.

2. The water purification system according to claim 1, characterized in that, In the direct flushing procedure, the control module controls the air pump and the concentrate solenoid valve to open, and the microbubble water flushes the reverse osmosis membrane and is then discharged through the concentrate outlet.

3. The water purification system according to claim 2, characterized in that, The water purification system also includes a return pipeline, with a first end connected to the concentrate pipeline and a second end connected to the inlet pipeline; the return pipeline includes a return solenoid valve and a first check valve, with the inlet of the first check valve near the first end of the return pipeline and the outlet of the first check valve near the second end of the return pipeline. In the circulating flushing procedure, the control module controls the reflux solenoid valve to open and the concentrate solenoid valve to close, and the microbubble water flows and circulates in the inlet pipe and the reflux pipe to flush the reverse osmosis membrane.

4. The water purification system according to claim 3, characterized in that, The drainage procedure is executed after the circulating flushing procedure; in the drainage procedure, the control module controls the concentrate solenoid valve to open and controls the return solenoid valve to close, and the microbubble water circulating to flush the reverse osmosis membrane is discharged through the concentrate outlet.

5. The water purification system according to claim 4, characterized in that, The water inlet pipeline includes a first filter element, a water inlet solenoid valve, a dissolved air tank, and a booster pump; the first filter element, the water inlet solenoid valve, the dissolved air tank, and the booster pump are sequentially arranged in the communication path between the raw water inlet and the microbubble water generating component; In the direct flushing procedure, the control module also controls the inlet solenoid valve and the booster pump to open; in the circulating flushing procedure, the control module also controls the booster pump to open and the inlet solenoid valve to close; in the drainage procedure, the control module also controls the inlet solenoid valve and the booster pump to open.

6. The water purification system according to claim 5, characterized in that, The microbubble water generating component includes a foaming solenoid valve, which has an open state and a closed state. In the open state, the raw water remains unchanged after passing through the foaming solenoid valve. In the closed state, the raw water forms the microbubble water after passing through the foaming solenoid valve. In the direct flushing procedure and the circulating flushing procedure, the control module is also used to control the aerating solenoid valve to be in the closed state; in the drainage procedure, the control module is also used to control the aerating solenoid valve to be in the open state.

7. The water purification system according to claim 6, characterized in that, The water purification pipeline includes a second filter element and a water purification solenoid valve, which are sequentially arranged in the communication path between the first end and the second end of the water purification pipeline. The water purification system also includes a pure water intake mode. In the pure water intake mode, the control module controls the inlet solenoid valve, the booster pump, the aerating solenoid valve, the purified water solenoid valve, and the concentrated water solenoid valve to open, and the raw water flows to the reverse osmosis membrane filter assembly. Part of the raw water becomes pure water after being filtered by the reverse osmosis membrane filter assembly, and the pure water flows out through the water outlet faucet. The other part of the raw water becomes concentrated water, and the concentrated water is discharged through the concentrated water outlet.

8. A control method for a water purification system, characterized in that, The control method, applicable to the water purification system according to any one of claims 1 to 7, comprises: In the cleaning mode, the air pump is turned on and the water path between the purified water pipeline and the inlet water pipeline is disconnected. The raw water and gas pass through the microbubble water generating component to form microbubble water, which is then used to clean the reverse osmosis membrane of the reverse osmosis membrane filtration component.

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