Flushing method of filtering system, control device and water purifier

Abstract

The invention relates to the technical field of water treatment control, in particular to a washing method of a filtering system, a control device and a water purifier, a water making mode and a washing mode which can be circularly operated are arranged in the filtering system of the water purifier, and water making time is calculated in an accumulated mode when the water making mode is operated; comparing the water production time with a preset cumulative time, generating a comparison result, and determining the type of the switching device, thereby determining a flushing strategy according to the type of the switching device and the comparison result of the water production time and the preset cumulative time, operating a flushing mode according to the flushing strategy, and operating the flushing mode to a preset flushing time; the reverse osmosis filter element can greatly reduce impurity deposition in the reverse osmosis filter element, replace a scale inhibitor, improve the cleanliness and the filtering efficiency of the reverse osmosis filter element, greatly prolong the service life of the reverse osmosis filter element, facilitate reduction of the risk that microorganisms and residual chemical agents are easy to breed in the reverse osmosis filter element, improve the quality of pure water and reduce the production cost. The drinking safety of a user is guaranteed; and the concentrated water discharge pollution is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment control, and in particular to a flushing method of a filtering system, a control device and a water purifier. BACKGROUND

[0002] In the process of producing pure water, various dissolved solids in water will gradually concentrate in the reverse osmosis filter core to form high-concentration concentrated water. When the water purification equipment is stopped for a long time, these concentrated water will slowly precipitate to form tiny crystals. These crystals are distributed on the surface of the filter core to form scale, causing the filter core to be blocked and shortening the service life of the reverse osmosis filter core.

[0003] In order to inhibit the formation of scale in the filter core, chemical scale inhibitors are usually added in the reverse osmosis filter core in the existing water purifier to dissolve calcium and magnesium salts in water to inhibit scale deposition. However, the chemical scale inhibitors are easy to remain in the filter core, and the filter core with the added scale inhibitors is easy to breed microorganisms, increasing the risk of users ingesting chemical agents and microorganisms and adversely affecting the users' drinking water.

[0004] The present application is proposed to solve the problems of the prior art. SUMMARY

[0005] The present application is proposed to solve the problems of the prior art.

[0006] The technical solution adopted by the present application to solve the technical problems is as follows: A flushing method of a filtering system, the flushing method being applied to a filtering system, the filtering system having a water production mode for producing pure water and a flushing mode for flushing a reverse osmosis filter core, the filtering system comprising a pure water circuit for outputting pure water, a reverse osmosis filter core arranged in the pure water circuit, and a switching device, the switching device being located on the downstream side of the reverse osmosis filter core; The flushing method comprises: in response to an opening signal of the switching device, running the water production mode; cumulatively calculating a water production time; comparing the water production time with a preset cumulative time to obtain a comparison result; determining a switching device category; determining a flushing strategy corresponding to the switching device category and the comparison result; running the flushing mode according to the flushing strategy; wherein, if the flushing mode is started, a reverse osmosis filter is flushed by the flushing mode to a preset flushing time.

[0007] The flushing method of the filtering system as described above, the switch device at least comprises a smart faucet, and the smart faucet is arranged at an output end of the pure water channel. The flushing strategy corresponding to the switch device category and the comparison result further comprises: In response to an opening signal of the smart faucet, the water production mode is run. The water production time is accumulated and calculated; wherein, the water production time is a time from when the smart faucet is opened to when the smart faucet is closed. A first flushing strategy corresponding to the smart faucet is determined; the first flushing strategy is that, if the water production time reaches the preset accumulated time, the water production mode is kept running, and in response to a closing signal of the smart faucet, the flushing mode is switched to the preset flushing time.

[0008] The flushing method of the filtering system as described above, the filtering system further comprises a pure water tank arranged in the pure water channel, and the switch device at least comprises a first water level switch arranged in the pure water tank; the first water level switch comprises a first high water level and a first low water level arranged in a height direction of the pure water tank. The flushing strategy corresponding to the switch device category and the comparison result further comprises: In response to a signal of the first low water level, the water production mode is run. The water production time is accumulated and calculated; wherein, the water production time is a time from when a liquid surface in the pure water tank rises from the first low water level to the first high water level. A second flushing strategy corresponding to the first water level switch is determined; the second flushing strategy is that, if the water production time reaches the preset accumulated time, the flushing mode is switched to the preset flushing time, and during the water production time, the water production mode and the flushing mode corresponding to the second flushing strategy are repeatedly run.

[0009] The flushing method of the filtering system as described above further comprises: After the water production time reaches the preset accumulated time, the water production time is recalculated.

[0010] The flushing method of the filtering system as described above further comprises: When the flushing mode starts, the water production time is recalculated.

[0011] The flushing method of the filtering system as described above, the filtering system further has a standby mode, the flushing method further comprises: After the flushing mode is run for the preset flushing time, the standby mode is run in a non-water production time.

[0012] The flushing method of the filtering system as described above, the filtering system further comprises a water inlet channel for inputting raw water, a concentrated water channel for outputting concentrated water, a first water pump is arranged between the water inlet channel and the pure water channel and located on an upstream side of a reverse osmosis filter core, the first water pump is used for conveying raw water in the water inlet channel into the reverse osmosis filter core, and a concentrated water valve is arranged in the concentrated water channel. The flushing method further comprises: In the water production mode, the concentrated water valve is closed, and the water inlet channel and the pure water channel are conducted. In the flushing mode, the pure water channel is disconnected, the concentrated water valve is opened, and the water inlet channel and the concentrated water channel are conducted.

[0013] The flushing method of the filtering system as described above, the filtering system further comprises a raw water tank connected to the water inlet channel, a second water level switch arranged in the raw water tank, the raw water tank is provided with a water outlet and a water inlet, the water outlet is connected to the water inlet channel, the water inlet is connected to the concentrated water channel, and the second water level switch comprises a second high water level and a second low water level arranged at intervals along the height direction of the raw water tank. The flushing method further comprises: In response to the signal of the second high water level, the water production mode is run.

[0014] In another aspect, the application further provides a control device, which comprises a memory, a processor, and a flushing program of a filtering system stored in the memory and executable on the processor, the flushing program being configured to implement the flushing method as described above.

[0015] In another aspect, the application further provides a water purifier comprising the control device as described above.

[0016] Compared with the prior art, the application has the following beneficial effects: The present invention provides a flushing method for a filtration system, which comprises providing a cyclically operable water production mode and a flushing mode in the filtration system of a water purifier, accumulating and calculating the water production time when the water production mode is operated, comparing the water production time with a preset cumulative time and generating a comparison result, and determining the type of a switch device, thereby determining a flushing strategy according to the type of the switch device and the comparison result of the water production time with the preset cumulative time, operating the flushing mode according to the flushing strategy, and operating the flushing mode until the preset flushing time; through the above scheme, regular and frequent flushing of a reverse osmosis filter element can be achieved, scale inhibitors can be replaced, and impurity deposition inside the reverse osmosis filter element can be greatly reduced; with the long-term operation of the reverse osmosis filter element, the cleanliness and filtration efficiency of the reverse osmosis filter element can be improved, and the service life of the reverse osmosis filter element can be greatly extended; it is also beneficial to reduce the risk of microorganisms and residual chemicals easily breeding inside the reverse osmosis filter element, improve the quality of pure water, ensure the drinking safety of users and reduce concentrated water discharge pollution; there is no need to regularly purchase and add scale inhibitors, which is beneficial to saving resource consumption and reducing the production cost of the water purifier.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic flow chart of a flushing method for a filtration system according to an embodiment of the present invention; Figure 2 A schematic flow chart of a flushing method for a filtration system according to another embodiment of the present invention; Figure 3 A schematic flow chart of a flushing method for a filtration system according to another embodiment of the present invention; Figure 4 A connection diagram of a filtration system according to an embodiment of the present invention; Figure 5 FIG. 1 is a connection diagram of a filtration system according to another embodiment of the present invention. DETAILED DESCRIPTION

[0019] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The well-known modules, units, and connections, links, communications or operations therebetween are not shown or not described in detail. Furthermore, the described features, architectures or functions can be combined in any way in one or more embodiments. It should be understood by those skilled in the art that the various embodiments described below are only for illustration, and not for limiting the protection scope of the present application. It can also be easily understood that the modules or units or processing manners in the embodiments described herein and shown in the drawings can be combined and designed in various different configurations. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0020] In the following embodiments, the definition of various nouns or methods is generally based on the broad concept that can be implemented on the premise of the disclosed content in the embodiments, except for cases that are logically impossible. Under such understanding, various specific sub-limits of the nouns or methods should be regarded as the invention content of the present application, and should not be regarded as the specific limit not disclosed in the specification, or be interpreted in a narrow sense or biased. Similarly, the order of the steps in the method is flexible and variable on the premise that it can be logically implemented. The specific sub-limits of the broad concept of various nouns or methods are within the protection scope of the present application.

[0021] The main solution of the embodiments of the present application is: by setting a recyclable operation water production mode and a flushing mode in the filter system 100 of the water purifier, accumulating and calculating the water production time when the water production mode is running, comparing the water production time with the preset accumulated time and generating a comparison result, and determining the switch device category, so as to determine the flushing strategy according to the switch device category and the comparison result of the water production time and the preset accumulated time, run the flushing mode according to the flushing strategy, and the flushing mode runs to the preset flushing time.

[0022] In the present embodiment, the following is described with the control device as the execution subject for the convenience of description.

[0023] Since the reverse osmosis filter element 140 is prone to scale during water production, the service life of the reverse osmosis filter element 140 is shortened, and the prior art needs to add a chemical scale inhibitor in the reverse osmosis filter element 140, which causes the filter element to easily breed microorganisms and residual chemical agents, increases the risk of users ingesting microorganisms and chemical agents, and has an adverse effect on the drinking water of the users.

[0024] The application provides a solution, which can frequently flush the reverse osmosis filter element 140 in a short flushing cycle, effectively prevent scale from being generated inside the filter element, thereby prolonging the service life of the filter element, while replacing the traditional scale inhibitor, reducing the risk of breeding microorganisms and residual chemical agents inside the reverse osmosis filter element 140, and protecting the drinking safety of users, so as to solve the problems of easy scaling inside the reverse osmosis filter element 140 and health hazards of pure water.

[0025] To this end, the application provides a flushing method of the filtration system 100; it can be understood that the filtration system 100 capable of implementing the following method and the control device for storing and executing the following method are arranged in the water purifier, and the control device can be realized by a main controller, such as MCU (Microcontroller Unit), DSP (Digital Signal Process), FPGA (Field Programmable Gate Array), SOC (System On Chip) and the like.

[0026] With reference to Figure 1In an embodiment of the present application, the flushing method is applied to a filtering system 100 having a water production mode for producing pure water, a flushing mode for flushing a reverse osmosis filter core 140, the filtering system 100 comprising a water inlet module for inputting raw water, a pure water module for outputting pure water, a concentrated water module for outputting concentrated water, the reverse osmosis filter core 140, the water inlet module being in communication with a water inlet end of the reverse osmosis filter core 140, the pure water module being in communication with a pure water end of the reverse osmosis filter core 140, and the concentrated water module being in communication with a concentrated water end of the reverse osmosis filter core 140, wherein the pure water module comprises a pure water waterway 120 connected with the reverse osmosis filter core 140 and a switching device arranged in the pure water waterway 120 and located at a downstream side of the reverse osmosis filter core 140; when the filtering system 100 is in the water production mode, the water inlet module is in communication with the pure water module and in a working state, at this time, raw water can be input to the reverse osmosis filter core 140 through the water inlet module, and pure water can be produced by filtering through the reverse osmosis filter core 140, the pure water can be output through the pure water waterway 120, and the concentrated water module is in a closed state, which can increase the output of pure water; when the filtering system 100 is in the flushing mode, the water inlet module is in communication with the concentrated water module and in a working state, and the pure water module is in a closed state, at this time, raw water can be input to the reverse osmosis through the water inlet module to flush the reverse osmosis filter core 140, and the concentrated water flushed out from the inside of the reverse osmosis filter core 140 can flow out through the concentrated water output module, so that the concentrated water remaining in the inside of the reverse osmosis filter core 140 due to filtering clean water is replaced by raw water such as tap water, the flushing and cleaning of the reverse osmosis filter core 140 are realized, and the inside of the reverse osmosis filter core 140 is prevented from scaling, so as to prolong the service life of the reverse osmosis filter core 140; the control device is configured with the flushing method for controlling the filtering system 100 to run the water production mode and the flushing mode under different conditions, and the flushing method is specifically as follows.

[0027] The flushing method comprises steps S100-S600, wherein: S100, running the water production mode in response to an opening signal of the switching device; S200, accumulatively calculating a water production time; wherein the water production time is a time from the opening of the switching device to the closing of the switching device; S300, comparing the water production time with a preset accumulative time to obtain a comparison result; S400, determining a switching device category; S500, determining a flushing strategy corresponding to the switching device category and the comparison result; S600, running the flushing mode according to the flushing strategy; wherein if the flushing mode is started, the reverse osmosis filter core 140 is flushed through the flushing mode to a preset flushing time.

[0028] In the embodiment, when the switch device is opened, the filtering system 100 automatically runs the water production mode to produce pure water, and calculates the water production time, which represents the time for the filtering system 100 to produce pure water. In actual application, the filtering system 100 can be a real-time water production type water purification system or a pre-prepared water storage type water purification system. Different triggering conditions of the water production mode exist according to different filtering systems 100, and the water production time can be relatively short or long. The control device is configured with a preset cumulative time, and compares the actual water production time with the preset cumulative time to obtain a comparison result. The preset cumulative time forms a flushing cycle for the filtering system 100 to switch to the flushing mode. If the water production time does not reach the preset cumulative time, it means that the filtering system 100 does not meet the condition of the flushing cycle. At this time, the filtering system 100 does not run the flushing mode, waits for the next water production and accumulates the water production time until the water production time meets the flushing condition. If the water production time reaches the preset cumulative time, it means that the filtering system 100 meets the condition of the flushing cycle. At this time, the filtering system 100 automatically switches to the flushing mode to flush the reverse osmosis filter element 140 for a preset flushing time, so as to replace the concentrated water in the reverse osmosis filter element 140 with tap water. The control device can configure a short flushing cycle to flush the reverse osmosis filter element 140, which can greatly reduce the deposition of impurities inside the reverse osmosis filter element 140. With the long-term operation of the reverse osmosis filter element 140, the cleanliness and filtration efficiency of the reverse osmosis filter element 140 can be improved, and the service life of the reverse osmosis filter element 140 can be greatly prolonged. The above scheme can realize regular and frequent flushing of the reverse osmosis filter element 140, which can replace the scale inhibitor, reduce the risk of breeding microorganisms and residual chemical agents inside the reverse osmosis filter element 140, improve the quality of pure water, ensure the safety of users, reduce the pollution of concentrated water discharge, and also does not need to regularly purchase and add scale inhibitors, which is beneficial to save resource consumption and reduce the production cost of the water purifier.

[0029] In the embodiment, different types of switch devices can be configured according to different filtering systems 100, and whether the user takes water can be determined by identifying the type of switch device. Further, the flushing strategy is determined according to the type of switch device and the comparison result of the water production time and the preset cumulative time, and the flushing mode is run according to the flushing strategy. The control device in the embodiment can set different flushing strategies according to different types of switch devices.

[0030] In some optional embodiments, when the control device determines that water is not taken by the user by identifying the type of the switch device, for example, the filtration system 100 is a prefabricated water storage type water purification system, which can prepare pure water in advance and store it for the user to use at any time, the control device can be configured to circulate the water production mode and the flushing mode. Specifically, if the overall water production time is much longer than the preset cumulative time and the water is not taken by the user, when the water production time reaches the preset cumulative time, the control device automatically switches to the flushing mode to flush the reverse osmosis filter element 140 to the preset flushing time. When the flushing When the washing mode ends and the overall water production time has not ended, the water production mode and the flushing mode are repeatedly circulated until the overall water production time ends; in this scheme, the control device can continuously clean the reverse osmosis filter element 140 in a shorter flushing mode during the intervals of the cyclic operation of the water production mode, which greatly reduces the deposition of impurities inside the reverse osmosis filter element 140, thereby avoiding scaling inside the reverse osmosis filter element 140, so as to replace the traditional scale removal agent, so that the filtration system 100 can stably produce high-quality pure water, and can store pure water for a longer time for user use.

[0031] Preferably, when the user is not taking water, when the water production mode and the flushing mode are cyclically operated, the preset cumulative time is set to 5 minutes, and the preset flushing time is set to 7 seconds, that is, the preferred flushing method is that the filtration system 100 produces water for 5 minutes and then flushes the reverse osmosis filter element for 7 seconds, and during the water production time, the filtration system 100 cyclically operates according to the flushing method, so that the control device can flush the reverse osmosis filter element 140 with a shorter flushing cycle, which can greatly reduce the impurity deposition inside the reverse osmosis filter element 140, improve the cleanliness and filtration efficiency of the reverse osmosis filter element 140, and greatly extend the service life of the reverse osmosis filter element 140. Moreover, the above-mentioned flushing method can realize regular and frequent flushing of the reverse osmosis filter element 140, which can replace scale inhibitors, and is beneficial to reducing the risk of microorganisms and residual chemicals growing inside the reverse osmosis filter element 140, improving the quality of pure water, ensuring the drinking safety of users and reducing concentrated water discharge pollution. There is no need to regularly purchase and add scale inhibitors, which is beneficial to saving resource consumption and reducing the production cost of water purifiers.

[0032] In other optional embodiments, when the control device determines that the user is drawing water by identifying the type of the switch device, for example, the filtration system 100 is a real-time water-making type water purification system, when the user draws water, the control device can control the filtration system 100 to produce pure water in real time and deliver it to the user. The control device can be configured to run the flushing mode only after the user has used up the pure water to replace the concentrated water in the reverse osmosis membrane with tap water, thereby effectively preventing scale from forming inside the reverse osmosis filter element 140, extending the service life of the reverse osmosis filter element 140, and avoiding interruption of the user's water drawing, thereby optimizing the user's experience of the water purifier.

[0033] In this embodiment, further optionally, the flushing method further comprises: after the water production time reaches the preset cumulative time, recalculating the water production time; or, at the start of the flushing mode, recalculating the water production time. When the water production time meets the flushing condition, the control device will recalculate the water production time to start a new flushing cycle monitoring, which can reduce the operation burden of the flushing program, facilitate the accuracy of the flushing cycle, and avoid the extension of the reverse osmosis filter element 140 flushing cycle, resulting in the loss of control of the internal pollution accumulation of the reverse osmosis filter element 140, thereby avoiding the flushing failure of the reverse osmosis filter element 140 and achieving the purpose of protecting the reverse osmosis filter element 140. Further, if the control device generates a flushing strategy according to the switch device category, and the flushing cycle is greater than the preset cumulative time, for example, in the water production process under user water control, the control device can be configured to recalculate the water production time at the start of the flushing mode.

[0034] In this embodiment, further optionally, the filtration system 100 also has a standby mode, and the flushing method further comprises: after running the flushing mode for the preset flushing time, running the standby mode in the non-water production time. Specifically, the standby mode can be understood as a low-power running state of the filtration system 100 when there is no water production demand, and the control device suspends the running of the water production mode and the flushing mode when it does not identify any action of the switch device within a certain time; when the control device receives an opening signal in the switch device, it can wake up the filtration system 100 to enter the water production state.

[0035] Referring to Figure 2 Another embodiment of the present application provides a flushing method of a filtration system 100, based on the above Figure 1 As shown in the embodiment, the control device can determine different flushing strategies according to different switch device categories. In this embodiment, the switch device at least includes a smart faucet 121, and the smart faucet 121 is arranged at the output end of the pure water waterway 120; the step S510-S530 of determining the flushing strategy corresponding to the switch device category and the comparison result further comprises: S510, in response to the opening signal of the smart faucet 121, running the water production mode; S520, accumulatively calculating the water production time; wherein the water production time is the time from the opening to the closing of the smart faucet 121; S530. Determine a first flushing strategy corresponding to the smart faucet 121; the first flushing strategy is that if the water production time reaches the preset cumulative time, keep running the water production mode, and in response to the closing signal of the smart faucet 121, switch the flushing mode to the preset flushing time.

[0036] In this embodiment, the filtration system 100 is configured as a real-time water-making type water purification system. The control device can determine that the user is taking water by identifying the smart faucet 121. When the user takes water, the filtration system 100 can prepare pure water in real time and output it to the user, which can ensure the freshness of the pure water and improve the quality of the pure water, thereby ensuring the user's drinking health. In actual application, the water production time can be understood as the user's water extraction time, that is, the water production time can be the time from opening to closing the smart faucet 121. Since the user's water extraction time is generally short, and in order to prevent the user's water extraction process from being interrupted, the control device can execute the first flushing strategy corresponding to the smart faucet 121. When the control device accumulates and calculates that the water production time is equal to the preset cumulative time, it still keeps running the water production mode until the user turns off the smart faucet 121. The control device responds to the closing signal of the smart faucet 121 and automatically switches the flushing mode to the preset flushing time. That is, after the user finishes extracting water, the control device will run the flushing mode to flush the reverse osmosis filter element 140, so that the reverse osmosis filter element 140 can restore good filtration performance and wait for the user to extract water next time.

[0037] Furthermore, the first flushing strategy also includes: if the water production time is less than the preset cumulative time, then the flushing mode is not executed, and the water production time continues to be accumulated. In actual applications, there may be a situation where the user's water collection time is shorter than the preset cumulative time, that is, the water production time is shorter than the preset cumulative time, so that within the cumulative calculation period of the water production time, the user may draw water multiple times. In this case, since the user's water collection time is short, the filtration loss of the reverse osmosis filter 140 is small. In order to save water resources, if the water production time does not meet the flushing conditions, the flushing mode is temporarily not executed.

[0038] On the other hand, based on the above flushing method, such as Figure 4As shown, the application also provides a filtering system 100 applied to a water purifier, the filtering system 100 comprising a water inlet channel 110 for inputting raw water, a concentrated water channel 130 for outputting concentrated water, a reverse osmosis filter core 140 arranged between the water inlet channel 110, a pure water channel 120 and the concentrated water channel 130, the water inlet channel 110 being provided with a pre-filter core 111, a water inlet valve 112 and a first water pump 160 in the water flow direction, the first water pump 160 being located at the upstream side of the reverse osmosis filter core 140, and the first water pump 160 being used to deliver the raw water in the water inlet channel 110 to the reverse osmosis filter core 140, in the embodiment, the water inlet module can be formed by the water inlet channel 110, the pre-filter core 111, the water inlet valve 112 and the first water pump 160; the concentrated water channel 130 is provided with a concentrated water valve 131, in the embodiment, the concentrated water module can be formed by the concentrated water channel 130 and the concentrated water valve 131; the pure water channel 120 is provided with a one-way valve 123 and a pressure switch 124 in the water flow direction, in the embodiment, the pure water module can be formed by the pure water channel 120, the one-way valve 123 and the pressure switch 124, and the pressure switch 124 can be cooperatively operated with an intelligent faucet 121; optionally, the first water pump 160 is arranged as a booster pump. In actual application, the control device controls the filtering system 100 to operate the water making mode in response to the opening signal of the intelligent faucet 121, at this time, the water inlet valve 112 is opened, the concentrated water valve 131 is closed, and when the intelligent faucet 121 is opened, the booster pump can be controlled to be opened by the pressure switch 124, the raw water is sequentially subjected to secondary filtration by the pre-filter core 111 and the reverse osmosis filter core 140, and the pure water produced is sequentially output to the user through the pure water channel 120, the one-way valve 123 is used to prevent the pure water from flowing back, so as to ensure the normal output of the pure water and protect the reverse osmosis filter core 140; while the filtering system 100 operates the water making mode, the control device monitors the water making time accumulation and the closing signal of the intelligent faucet 121 in real time, so as to facilitate the operation of the flushing mode according to the first flushing strategy, in the embodiment, the control device can set the starting point of the water making time at the time when the pressure switch 124 is triggered or the time when the intelligent faucet 121 is triggered, or a water flow sensor can be arranged at the upstream side of the reverse osmosis filter core 140 or the water inlet end of the reverse osmosis filter core 140, and when the control device receives the trigger signal of the water flow sensor, the water making time is started to be calculated, which is conducive to improving the control accuracy of the flushing period; when the filtering system 100 operates the flushing mode, the intelligent faucet 121 is closed, and the concentrated water valve 131 is opened, at this time, the raw water flows to the reverse osmosis filter core 140 along the water inlet channel 110 for flushing, and the concentrated water flushed out can be discharged through the concentrated water channel 130. It should be noted that other circuits can be added in the above filtering system 100 in actual application.

[0039] In other optional embodiments, as Figure 4As shown, the pure water waterway 120 is also connected to the pre-filter element 111. The pure water can be further filtered through the pre-filter element 111 before being output, which is beneficial to improving the quality of pure water and ensuring the drinking health of users.

[0040] Reference Figure 3 Another embodiment of the present invention provides a method for flushing the filter system 100. Figure 1 or Figure 2 In the embodiment shown, the control device can determine different flushing strategies according to different types of switch devices. In this embodiment, the filtration system 100 further includes a pure water tank 150 provided in the pure water waterway 120. The switch device includes at least a first water level switch 122 provided in the pure water tank 150. The first water level switch 122 includes a first high water level and a first low water level spaced apart along the height direction of the pure water tank 150. The first high water level can be used as a full water level in the pure water tank 150, and the first low water level can be used as a water shortage level in the pure water tank 150. The method of determining the flushing strategy corresponding to the type of the switch device and the comparison result further includes steps S540 to S560, wherein: S540, in response to the first low water level signal, running the water production mode; S550, cumulatively calculating the water production time; wherein the water production time is the time it takes for the liquid level in the pure water tank 150 to rise from the first low water level to the first high water level; S560. Determine a second flushing strategy corresponding to the first water level switch 122; the second flushing strategy is that if the water production time reaches the preset cumulative time, the flushing mode is switched to the preset flushing time, and during the water production time, the water production mode and the flushing mode corresponding to the second flushing strategy are repeatedly run.

[0041] In the embodiment, the filter system 100 is configured as a pre-prepared water storage type water purification system, and the control device can identify the switch device as the first water level switch 122, and the first water level switch 122 is arranged in the pure water tank 150, so that it can be determined that the water production mode belongs to the first low water level signal trigger in the pure water tank 150. At this time, the filter system 100 can realize the pre-prepared water process in the case of non-user direct water taking, and the control device can respond to the signal of the first low water level to automatically run the water production mode, and simultaneously accumulate the water production time. The water production time is the time for the liquid level in the pure water tank 150 to rise from the first low water level to the first high water level, that is, the filter system 100 can cycle water production to the pure water tank 150 full, and determine the second flushing strategy corresponding to the first water level switch 122. In actual application, the water production process of the filter system 100 can continue without user intervention, for example, water production in advance during user sleep time or user outing time, so as to provide sufficient pure water for the user. When the control device obtains the comparison result that the water production time is equal to the preset accumulation time, the control device automatically switches the flushing mode to the preset flushing time, and then re-switches to the water production mode to continue water production. At the same time, the control device re-calculates the water production time and monitors whether the water production time reaches the flushing condition. If the re-calculated water production time reaches the flushing condition, the control device continues to switch to the flushing mode to flush the reverse osmosis filter element 140. That is, the control device can repeatedly run the water production mode and the flushing mode according to the preset accumulation time, so that the control device can constantly clean the reverse osmosis filter element 140 in a short time flushing mode during the interval of the cyclically running water production mode, greatly reducing the deposition of impurities inside the reverse osmosis filter element 140, thereby avoiding the scaling inside the reverse osmosis filter element 140, to realize the replacement of the traditional descaling agent, so that the filter system 100 can stably produce high-quality pure water, and the pure water can be stored for a longer time to facilitate the user to use water.

[0042] In other optional embodiments, the filter system 100 can be configured as a combination of pre-prepared water storage type and real-time water production type water purification system, such as Figure 5As shown, the switch device includes the intelligent faucet 121 and the first water level switch 122, and the pure water waterway 120 is provided with a second water pump 125 between the pure water tank 150 and the intelligent faucet 121; the second flushing strategy further includes: responding to the opening signal of the intelligent faucet 121; determining the liquid level condition in the pure water tank 150 through the first water level switch 122; determining the water production mode corresponding to the liquid level condition in the pure water tank 150; if the liquid level in the pure water tank 150 is above the first low water level, opening the second water pump 125, and conveying the water in the pure water tank 150 to the intelligent faucet through the second water pump 125; if the liquid level in the pure water tank 150 is at the first low water level, directly starting the water production mode to produce fresh pure water in real time and conveying the fresh pure water to the user.

[0043] In some optional embodiments, the filter system 100 further includes a raw water tank 170 connected to the water inlet waterway 110, and a second water level switch 171 arranged in the raw water tank 170, the raw water tank 170 is provided with a water outlet 172 and a water inlet 173, the water outlet 172 is connected to the water inlet waterway 110, and the water inlet 173 is connected to the concentrated water waterway 130, the second water level switch 171 includes a second high water level and a second low water level arranged along the height direction of the raw water tank 170; the flushing method further includes: responding to the signal of the second high water level, running the water production mode.

[0044] Specifically, the second high water level can represent the full water level of the raw water tank 170, and the second low water level can represent the water shortage level of the raw water tank 170, and the second water level switch 171 is electrically connected with the first water pump 160; when the control device receives the second high water level signal, it indicates that the water level in the raw water tank 170 is high, at this time the water production mode can be directly run, and the pure water produced can be stored in the pure water tank 150 to avoid overflow of the raw water tank 170; when the control device receives the second low water level signal, it indicates that the raw water tank 170 is short of water, at this time the control device sends a water replenishment signal to the user, for example, the control device can send a water shortage warning signal to the user through at least one of the following modes: APP, applet, Internet of Things, water purifier interaction device and water purifier alarm device, so as to remind the user to replenish water in time.

[0045] Further, the concentrated water channel 130 is connected with the raw water tank 170, and the concentrated water valve 131 is configured as a flushing valve. In this embodiment, the control device can run the second flushing strategy according to the preset cumulative time during the whole water production process of the filtration system 100, that is, the control device can cyclically run the water production mode and the flushing mode according to a short flushing period, so as to realize frequent flushing of the reverse osmosis filter element 140 in a short period, and thus the TDS value of the concentrated water in the reverse osmosis filter element 140 is not too high. In this case, the concentrated water in the reverse osmosis filter element 140 is unidirectionally delivered into the raw water tank 170 through the flushing valve, so as to realize concentrated water recovery, improve the utilization rate of water resources, and reduce the concentrated water loss.

[0046] In other optional embodiments, the control device is further configured with a memory module for recording historical water taking data of the user, the historical water taking data including at least one of water taking time data and water taking capacity data. The control device can predict the water taking peak period of different users in daily life and the peak period water taking amount corresponding to the water taking peak period according to the historical water taking data, and run the pre-prepared water mode according to the historical water taking data. The control device can prepare enough water in advance before the water taking peak period of the user according to the pre-prepared water mode, so as to further facilitate the user to take water, so that the filtration system 100 can adapt to the water taking habits of different users to produce water, further optimize the user experience, and improve the freshness of the pure water in the pure water tank 150, so as to protect the drinking health of the user. Further, when the filtration system 100 runs the pre-prepared water mode, the control device synchronously calculates the water production time and compares the water production time with the preset cumulative time, so that the control device can run the flushing mode according to the second flushing strategy, so as to improve the pure water quality, prevent scaling in the reverse osmosis filter element 140, and prolong the service life of the reverse osmosis filter element 140. Further, the control device can detect the liquid level in the pure water tank 150 through the first water level switch 122, especially before the predicted water taking peak period, compare the real-time capacity in the pure water tank 150 with the peak period water taking amount, and determine the required pre-prepared pure water amount according to the difference between the real-time capacity in the pure water tank 150 and the peak period water taking amount, so as to supplement the water amount required by the user in the peak period by running the pre-prepared water mode. It should be noted that the specific implementation of the pre-prepared water mode in this embodiment is similar to that of the water production mode, which will not be described here.

[0047] On the other hand, based on the above flushing method, the application further provides another filtration system 100, as shown in FIG. 6. Figure 5As shown, the filter system 100 comprises a raw water tank 170 connected with the water inlet channel 110, a second water level switch 171 arranged in the raw water tank 170, the raw water tank 170 is provided with a water outlet 172 and a water inlet 173, the water outlet 172 is connected with the water inlet channel 110, the water inlet 173 is connected with the concentrated water channel 130, the second water level switch 171 comprises a second high water level and a second low water level arranged along the height direction of the raw water tank 170, in the embodiment, the water inlet module can be formed by the raw water tank 170, the water inlet channel 110 and the first water pump 160, wherein the first water pump 160 is configured as a self-priming pump, and the water inlet valve 112 is integrated in the self-priming pump; the pure water channel 120 is provided with a pure water tank 150 and a first water level switch 122 arranged in the pure water tank 150, and a second water pump 125 is arranged between the pure water tank 150 and the intelligent faucet 121, in the embodiment, the pure water module can be formed by the pure water tank 150, the second water pump 125 and the pure water channel 120; further, in the embodiment, the filter system 100 can be configured as a single filter core water purification system, that is, the filter system 100 is provided with a reverse osmosis filter core 140, wherein the reverse osmosis filter core 140 can be configured as a five-in-one composite filter core, etc., which is not limited in the application; in actual application, when the control device receives the second high water level signal, the self-priming pump is triggered to open to run the water making mode, and at the same time, the water in the raw water tank 170 is stored in the pure water tank 150 to reach the first high water level; when the control device receives the second low water level signal, the self-priming pump is triggered to close to stop the water inlet of the reverse osmosis filter core 140; and when the filter system 100 is in the water making mode or the pre-water making mode, the control device closes the concentrated water valve 131 to block the concentrated water channel 130, so as to improve the output of pure water; when the filter system 100 is in the flushing mode, the control device closes the second water pump 125 and opens the self-priming pump and the flushing valve, at this time, the raw water in the raw water tank 170 can be used to flush the reverse osmosis filter core 140, and the concentrated water flushed out from the reverse osmosis filter core 140 can be returned to the raw water tank 170 through the concentrated water channel 130, so as to recycle the concentrated water of the filter system 100, thereby improving the utilization rate of water.

[0048] Further, the pure water tank 150 is provided with a disinfection device 126 and a pure water TDS detector 127. The disinfection device 126 can be a UV lamp. The disinfection device 126 is used to further disinfect and sterilize the pure water in the pure water tank 150, so as to improve the quality of the pure water, avoid the quality of the pure water from being reduced due to long storage time, and further ensure the safety of the user. The pure water TDS detector 127 is used to detect the TDS value of the pure water, so as to help the user to know the quality of the pure water in the pure water tank 150. Optionally, an interactive device such as a display screen can be arranged outside the pure water tank 150, so as to display the TDS value of the pure water to the user. The user can also select whether to turn on the disinfection device 126 according to the TDS value of the pure water. Specifically, the interactive device can be provided with a button for the user to start the disinfection device 126. The control device can respond to the triggering action of the button to turn on the disinfection device 126.

[0049] In another aspect, the present application is based on Figure 4 In another aspect, the present application is based on Figure 4 In another aspect, the present application is based on In another aspect, the present application is based on

[0050] In another aspect, the present application is based on Figure 5 In another aspect, the present application is based on Figure 5The filter system in the water purifier is connected, new national standard water efficiency water is used for water supply, the initial GPD value of the reverse osmosis filter core is 800G, the initial GPD value is converted into water production of about 3028L / day, the recovery rate is 1:1, under standard conditions (such as water inlet temperature 25 DEG C, water inlet pressure 0.8MPa), respectively according to flushing method three and flushing method four continuous operation, stop testing when the life flow is less than 2.1L / min;Wherein the flushing method three is that the reverse osmosis filter core is flushed for 18 seconds after cumulative water production of 30 minutes, the flushing method four is that the reverse osmosis filter core is flushed for 7 seconds after cumulative water production of 5 minutes, under the same pure water TDS value, the water production of the reverse osmosis filter core in the flushing method three is 2436L, the GPD value is 772.450, the GPD value is lower than 800G, which indicates that the service life of the reverse osmosis filter core is unqualified, the GPD value of the reverse osmosis filter core in the flushing method four is 813.926, and the water production of the reverse osmosis filter core is 4641L, and the results show that under the condition of not adding scale inhibitor, under the same condition, flushing the reverse osmosis filter core for 7 seconds after cumulative water production of 5 minutes, the service life of the reverse osmosis filter core can be prolonged by 190%, and the highest can meet the first water efficiency grade.

[0051] The application further provides a control device, which comprises a memory, a processor and a flushing program of the filter system 100 stored in the memory and executable on the processor.

[0052] It is worth noting that, since the control device is based on the flushing method of the filter system 100, the embodiments of the control device include all the technical solutions of the flushing method of the filter system 100, and the technical effects are also completely the same, which will not be repeated here.

[0053] The application further provides a water purifier, which comprises the control device according to any one of the above embodiments.

[0054] It is worth noting that, since the water purifier is based on the control device, the embodiments of the water purifier include all the technical solutions of the control device, and the technical effects are also completely the same, which will not be repeated here.

[0055] It should be noted that, in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such a process, method, article or system. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or system including the element.

[0056] The above-mentioned embodiment numbers of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0057] Through the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be realized by means of software and the necessary general hardware platform, of course, they can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as a ROM / RAM, a magnetic disk, or an optical disc) and includes a plurality of instructions for causing a terminal device (which can be a mobile phone, a computer, a server, or a network device) to execute the methods of the various embodiments of the present application.

[0058] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent flow transformation made by using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for flushing a filtration system, characterized in that: The flushing method is applied to a filtration system (100), wherein the filtration system (100) has a water production mode for preparing pure water and a flushing mode for flushing a reverse osmosis filter element (140), and the filtration system (100) comprises a pure water channel (120) for outputting pure water, a reverse osmosis filter element (140) disposed in the pure water channel (120), and a switch device, wherein the switch device is located on the downstream side of the reverse osmosis filter element (140); The flushing method comprises: In response to an opening signal of the switch device, operating the water production mode; Calculate the cumulative water production time; Comparing the water production time with a preset cumulative time to obtain a comparison result; determining the switchgear category; determining a flushing strategy corresponding to the switchgear category and the comparison result; The flushing mode is run according to the flushing strategy; wherein, if the flushing mode is started, the reverse osmosis filter element (140) is flushed by the flushing mode to a preset flushing time.

2. A method for flushing a filtration system according to claim 1, characterized in that: The switch device at least comprises an intelligent faucet (121), and the intelligent faucet (121) is arranged at the output end of the pure water channel (120); Determining a flushing strategy corresponding to the switch device category and the comparison result further includes: In response to an opening signal of the smart faucet (121), running the water production mode; The water production time is cumulatively calculated; wherein the water production time is the time from when the smart faucet (121) is turned on to when it is turned off; A first flushing strategy corresponding to the smart faucet (121) is determined; the first flushing strategy is that if the water production time reaches the preset cumulative time, the water production mode is maintained, and in response to a closing signal of the smart faucet (121), the flushing mode is switched to the preset flushing time.

3. A method for flushing a filtration system according to claim 1, characterized in that: The filtration system (100) further comprises a pure water tank (150) provided in the pure water waterway (120); the switch device comprises at least a first water level switch (122) provided in the pure water tank (150); the first water level switch (122) comprises a first high water level and a first low water level spaced apart along a height direction of the pure water tank (150); Determining a flushing strategy corresponding to the switch device category and the comparison result further includes: In response to the first low water level signal, running the water production mode; The water production time is cumulatively calculated; wherein the water production time is the time for the liquid level in the pure water tank (150) to rise from the first low water level to the first high water level; A second flushing strategy corresponding to the first water level switch (122) is determined; the second flushing strategy is that if the water production time reaches the preset cumulative time, the flushing mode is switched to the preset flushing time, and within the water production time, the water production mode and the flushing mode corresponding to the second flushing strategy are repeatedly operated.

4. A method for flushing a filtration system according to claim 1, characterized in that: The flushing method further comprises: After the water production time reaches the preset cumulative time, the water production time is recalculated.

5. The method for flushing a filtration system according to claim 1, wherein: The flushing method further comprises: When the flushing mode starts, the water production time is recalculated.

6. A method for flushing a filtration system according to claim 1, characterized in that: The filtration system (100) also has a standby mode, and the flushing method further comprises: After running the flushing mode until the preset flushing time, the standby mode is run during non-water production time.

7. A method for flushing a filtration system according to claim 1, characterized in that: The filtration system (100) further comprises an inlet waterway (110) for inputting raw water, and a concentrated waterway (130) for outputting concentrated water. A first water pump (160) located upstream of the reverse osmosis filter element (140) is provided between the inlet waterway (110) and the pure water waterway (120). The first water pump (160) is used to transport the raw water in the inlet waterway (110) to the reverse osmosis filter element (140). A concentrated water valve (131) is provided in the concentrated waterway (130). The flushing method further comprises: In the water production mode, the concentrated water valve (131) is closed, and the water inlet waterway (110) and the pure water waterway (120) are connected; In the flushing mode, the pure water circuit (120) is disconnected, the concentrated water valve (131) is opened, and the inlet water circuit (110) and the concentrated water circuit (130) are connected.

8. A method for flushing a filtration system according to claim 7, characterized in that: The filtration system (100) further comprises a raw water tank (170) connected to the water inlet circuit (110), and a second water level switch (171) disposed in the raw water tank (170); the raw water tank (170) is provided with a water outlet (172) and a water inlet (173); the water outlet (172) is connected to the water inlet circuit (110), and the water inlet (173) is connected to the concentrated water circuit (130); the second water level switch (171) comprises a second high water level and a second low water level that are spaced apart along the height direction of the raw water tank (170); The flushing method further comprises: In response to the second high water level signal, the water production mode is operated.

9. A control device, characterized in that: The control device comprises: a memory, a processor, and a flushing program of the filtration system (100) stored in the memory and operable on the processor, wherein the flushing program is configured to implement the flushing method according to any one of claims 1 to 8.

10. A water purifier, characterized in that: Comprising the control device as claimed in claim 9.

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