Control method for water purification apparatus and water purification apparatus

Abstract

This invention relates to the field of water purification technology, specifically providing a control method and a water purification device for water purification equipment. The aim is to solve the problem that cleaning the reverse osmosis membrane filter cartridge in existing water purification equipment can affect its normal operation. The water purification device of this application includes a reverse osmosis membrane filter cartridge and a cleaning component. The cleaning component is capable of cleaning the reverse osmosis membrane filter cartridge. The control method includes the following steps: determining whether the reverse osmosis membrane filter cartridge meets the cleaning conditions; when the reverse osmosis membrane filter cartridge meets the cleaning conditions, acquiring historical water usage data of the water purification equipment; acquiring a cleaning duration Ti; determining a target cleaning time Tc based on the historical water usage data and the cleaning duration Ti; and causing the cleaning component to begin cleaning the reverse osmosis membrane filter cartridge at the target cleaning time Tc. This application allows for selecting an appropriate time to clean the reverse osmosis membrane filter cartridge, thereby avoiding peak water usage periods and preventing disruption to the normal operation of the water purification equipment, thus improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, specifically providing a control method and a water purification device for use in water purification equipment. Background Technology

[0002] As people's living standards improve, their demand for drinking water is also increasing. Water purifiers, water purifier-drinking machines, and other water purification equipment are gradually becoming essential drinking water facilities in people's daily lives.

[0003] After prolonged use, dirt and grime can accumulate inside the reverse osmosis membrane filter element, affecting the water production rate and thus the lifespan of the filter element. Cleaning the reverse osmosis membrane filter element with a detergent after a period of use can remove this dirt and extend its lifespan.

[0004] In the existing technology, cleaning agents are used to clean the reverse osmosis membrane filter element, which can remove dirt from the reverse osmosis membrane filter element. However, due to the long cleaning time, the normal use of the water purification equipment is inevitably affected when cleaning the reverse osmosis membrane filter element, resulting in a poor user experience. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems to at least a certain extent, that is, to solve the problem that the cleaning of reverse osmosis membrane filter elements in existing water purification equipment affects the normal use of the water purification equipment, resulting in a poor user experience.

[0006] This invention provides a control method for a water purification device, the water purification device including a reverse osmosis membrane filter element and a cleaning component, the cleaning component being capable of cleaning the reverse osmosis membrane filter element. The control method includes the following steps: determining whether the reverse osmosis membrane filter element meets cleaning conditions; when the reverse osmosis membrane filter element meets cleaning conditions, acquiring historical water usage data of the water purification device; acquiring a cleaning duration Ti; determining a target cleaning time Tc based on the historical water usage data and the cleaning duration Ti; and causing the cleaning component to begin cleaning the reverse osmosis membrane filter element at the target cleaning time Tc.

[0007] In the preferred technical solution of the control method for the above-mentioned water purification equipment, the step of "determining the target cleaning time Tc based on the historical water usage data and the cleaning duration" specifically includes: determining the idle duration T0 of the water usage idle period based on the historical water usage data; determining whether the cleaning duration Ti is less than the water usage idle duration T0; and determining the target cleaning time Tc based on the determination result.

[0008] In the preferred technical solution of the control method for the above-mentioned water purification equipment, the step of "determining the target cleaning time Tc according to the judgment result" specifically includes: if the judgment result is "yes", then the target cleaning time Tc is between time point Ta and time point (Tb-Ti); and / or, if the judgment result is "no", then calculate the time difference ΔT = Ti-T0; obtain the first total water consumption Q1 within the time period from time point Tb to time point (Tb+ΔT); compare the first total water consumption Q1 with the preset water consumption Q0; determine the target cleaning time Tc according to the comparison result; wherein, Ta is the starting time point of the water idle period, Tb is the ending time point of the water idle period, (Tb-Ti) is the time point corresponding to the Ti time before time point Tb, and (Tb+ΔT) is the time point corresponding to the ΔT time after time point Tb.

[0009] In the preferred embodiment of the control method for the water purification equipment described above, the step of "determining the target cleaning time Tc according to the comparison result" specifically includes: if Q1 < Q0, then the target cleaning time Tc is time point Ta; and / or, if Q1 ≥ Q0, then further obtain the second total water consumption Q2 within the time period from time point (Ta-△T) to time point Ta; further compare the second total water consumption Q2 with the preset water consumption Q0; and determine the target cleaning time Tc according to the further comparison result; wherein, (Ta-△T) is the time point corresponding to the time △T before time point Ta.

[0010] In the preferred technical solution of the control method for the water purification equipment described above, the step of "determining the target cleaning time Tc based on further comparison results" specifically includes: if Q2 < Q0, then the target cleaning time Tc is a time point (Ta-ΔT); and / or, if Q2 ≥ Q0, then a prompt is issued to the user.

[0011] In the preferred embodiment of the control method for the water purification equipment described above, when Q2≥Q0, the control method further includes the following steps: obtaining the cleaning mode of the water purification equipment; determining whether the cleaning process includes at least two independent sub-cleaning stages based on the cleaning mode; if the determination result is "yes", then causing the cleaning component to perform different sub-cleaning stages during different idle water periods.

[0012] In the preferred technical solution of the control method for the above-mentioned water purification equipment, the step of "obtaining the cleaning duration Ti" specifically includes: obtaining water production data when the water purification equipment is in water production mode; determining the cleaning duration Ti based on the water production data; wherein, the water production data includes at least one of the following: the inlet water quality of the reverse osmosis membrane filter cartridge, the cumulative water production of the reverse osmosis membrane filter cartridge, the cumulative operating time of the water purification equipment, the duration during which the pure water-to-waste ratio of the reverse osmosis membrane filter cartridge is higher than the set pure water-to-waste ratio, the continuous water production duration of the reverse osmosis membrane filter cartridge after the pre-filter cartridge reaches the end of its service life, the pure water flow rate at the pure water end of the reverse osmosis membrane filter cartridge, and the pressure difference between the membrane front and the membrane back of the reverse osmosis membrane filter cartridge.

[0013] In the preferred embodiment of the control method for the water purification equipment described above, the water production data includes first data and second data. The step of "determining the cleaning duration Ti based on the water production data" specifically includes: predicting the fouling level A of the reverse osmosis membrane filter element based on the first data; predicting the fouling level B of the reverse osmosis membrane filter element based on the second data; and determining the cleaning duration Ti based on the fouling level A and the fouling level B. Wherein, the fouling level A is the level at which the reverse osmosis membrane filter element may be fouled, and the fouling level B is the level at which the reverse osmosis membrane filter element is actually fouled. The first data includes at least one of the following: the inlet water quality at the inlet of the reverse osmosis membrane filter element; the cumulative water production of the reverse osmosis membrane filter element; the cumulative operating time of the water purification equipment; the duration for which the pure water-to-waste ratio of the reverse osmosis membrane filter element is higher than the set pure water-to-waste ratio; and the continuous water production duration of the reverse osmosis membrane filter element after the pre-filter element reaches its service life. The second data includes at least one of the following: the pure water flow rate at the pure water end of the reverse osmosis membrane filter element; and the pressure difference between the membrane front and back of the reverse osmosis membrane filter element.

[0014] In the preferred embodiment of the control method for the water purification equipment described above, the step of "determining whether the reverse osmosis membrane filter element meets the cleaning conditions" specifically includes: obtaining the cumulative operating time of the water purification equipment; if the cumulative operating time reaches a set time, the reverse osmosis membrane filter element meets the cleaning conditions; and / or, obtaining the cumulative water production of the reverse osmosis membrane filter element; if the cumulative water production reaches a preset water production, the reverse osmosis membrane filter element meets the cleaning conditions; and / or, obtaining the pure water flow rate at the pure water end of the reverse osmosis membrane filter element; if the pure water flow rate is lower than a preset flow rate, the reverse osmosis membrane filter element meets the cleaning conditions; and / or, obtaining the pressure difference between the membrane inlet and outlet of the reverse osmosis membrane filter element; if the pressure difference is greater than a preset pressure difference, the reverse osmosis membrane filter element meets the cleaning conditions.

[0015] In a second aspect, the present invention also provides a water purification device, the water purification device including a controller configured to perform any of the control methods for the water purification device described above.

[0016] When the above-mentioned preferred technical solution is adopted, the appropriate time period for cleaning the reverse osmosis membrane filter element can be selected based on historical water usage data and cleaning duration Ti. This avoids peak water usage periods, prevents the normal use of the water purification equipment from being affected by cleaning the reverse osmosis membrane filter element, and improves the user experience.

[0017] Furthermore, based on historical water usage data, the idle time during which users do not use water can be determined first. Then, it can be determined whether the target cleaning time is less than the idle time during which water is used. This allows it to determine whether the cleaning components can complete the cleaning of the reverse osmosis membrane filter element during the idle time during which water is used. Based on this, the target cleaning time can be determined more accurately, avoiding the impact on the normal use of the water purification equipment due to the cleaning of the reverse osmosis membrane filter element.

[0018] Furthermore, when the cleaning time Ti is shorter than the idle water time T0, as long as the cleaning of the reverse osmosis membrane filter element can be completed within the idle water time, the normal use of the water purification equipment can be avoided due to the cleaning of the reverse osmosis membrane filter element. In other words, as long as the cleaning of the reverse osmosis membrane filter element can be started between time point Ta and time point (Tb-Ti), the cleaning of the reverse osmosis membrane filter element can be completed within the idle water time.

[0019] Furthermore, when the cleaning time Ti is greater than or equal to the idle water time T0, it means that the cleaning of the reverse osmosis membrane filter element cannot be completed within the idle water time T0. By calculating the time difference ΔT and determining whether the time period after the idle water time is a peak water usage period, the target cleaning time is determined. When the time period after the idle water time is a peak water usage period, the time period before the idle water time is determined to be a peak water usage period, thus determining the target cleaning time. This allows the reverse osmosis membrane filter element to be cleaned as much as possible while avoiding peak water usage periods.

[0020] Furthermore, when Q2≥Q0, it indicates that the cleaning time is relatively long. In this case, by determining whether the cleaning mode includes two or more independent sub-cleaning stages, if the cleaning mode includes two or more independent sub-cleaning stages, the cleaning component can perform different sub-cleaning stages during different idle water periods. This allows the cleaning of the reverse osmosis membrane filter element to be carried out in segments, avoiding the impact on the normal use of the water purification equipment due to excessive cleaning time.

[0021] Furthermore, since the first data directly affects the degree of fouling of the reverse osmosis membrane filter element, the potential fouling level of the reverse osmosis membrane filter element can be predicted based on the first data. Since the second data can directly reflect the fouling status of the reverse osmosis membrane filter element, the actual fouling status of the reverse osmosis membrane filter element can be more accurately reflected based on the predicted fouling level A and the predicted fouling level B of the reverse osmosis membrane filter element. This allows for a more accurate determination of the cleaning time Ti, further improving the user experience.

[0022] Furthermore, the water purification device provided by the present invention, based on the control method for the above-mentioned water purification device, is capable of executing the control method for the above-mentioned water purification device and thus possesses the beneficial effects of the control method for the above-mentioned water purification device. Compared with the previous improved water purification device, the water purification device of the present invention can avoid cleaning the reverse osmosis membrane filter element during peak water usage periods, making cleaning more flexible, avoiding affecting the normal use of the water purification device, and providing a better user experience. Attached Figure Description

[0023] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0024] Figure 1 This is a schematic diagram of one embodiment of the cleaning mode of the water purification device of the present invention;

[0025] Figure 2 This is a schematic diagram of a second embodiment of the cleaning mode of the water purification device of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of a third embodiment of the cleaning mode of the water purification device of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of Embodiment 4 of one of the cleaning modes of the water purification device of the present invention;

[0028] Figure 5 This is a schematic diagram of an embodiment of another cleaning mode of the water purification device of the present invention;

[0029] Figure 6 This is a schematic diagram of a second embodiment of the water purification device of the present invention, representing another cleaning mode.

[0030] Figure 7 This is a schematic diagram of a third embodiment of the water purification device of the present invention, representing another cleaning mode.

[0031] Figure 8 This is a schematic diagram of the structure of Embodiment 4, another cleaning mode of the water purification device of the present invention;

[0032] Figure 9This is a flowchart of the control method for a water purification device according to the present invention;

[0033] Figure 10 This is a flowchart of an embodiment of the control method for a water purification device according to the present invention.

[0034] List of reference numerals in the attached diagram:

[0035] 1. Main water inlet pipe; 11. Inlet valve; 12. Booster pump; 2. Reverse osmosis membrane filter element; 21. Wastewater outlet pipe; 211. Wastewater valve; 22. Drain pipe; 221. Drain valve; 23. Return pipe; 231. Return valve; 301. Cleaning inlet; 302. Cleaning outlet; 311. First cleaning pipe; 312. Second cleaning pipe; 321. First cleaning valve; 322. Second cleaning valve; 331. First cleaning agent storage component; 332. Second cleaning agent storage component; 341. First check valve; 342. Second check valve; 35. Manifold; 36. Diverter pipe; 361. Diverter valve; 4. Pre-filter unit; 5. Pure water outlet pipe; 51. Pure water usage component; 61. Circulation pipe; 62. Circulation pump. Detailed Implementation

[0036] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0037] It should be noted that in the description of this invention, terms such as "upper," "lower," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly, for example, referring to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] like Figures 1 to 8 As shown, the water purification device of the present invention includes a reverse osmosis membrane filter element 2 and a cleaning component. The cleaning component is capable of cleaning the reverse osmosis membrane filter element 2. Before cleaning the reverse osmosis membrane filter element 2, the control method of the present invention includes the following steps:

[0040] S1: Determine whether the reverse osmosis membrane filter element 2 meets the cleaning requirements;

[0041] S2: When the reverse osmosis membrane filter element 2 meets the cleaning conditions, obtain the historical water usage data of the water purification equipment;

[0042] S3: Obtain the cleaning duration Ti;

[0043] S4: Determine the target cleaning time Tc based on historical water usage data and cleaning duration Ti;

[0044] S5: Enables the cleaning component to begin cleaning the reverse osmosis membrane filter element 2 at the target cleaning time Tc.

[0045] With this setting, the appropriate time period can be selected to clean the reverse osmosis membrane filter element 2 based on historical water usage data and cleaning duration Ti. This avoids peak water usage periods and prevents the normal operation of the water purification equipment from being affected by cleaning the reverse osmosis membrane filter element 2, thus improving the user experience.

[0046] It should be noted that, in practical applications, those skilled in the art can obtain historical water usage data of the water purifier by acquiring data stored in the water purifier's storage device, or by acquiring historical water usage data of the water purifier through a mobile terminal device (such as a tablet or mobile phone) that is connected to the water purifier. Such adjustments and changes to the specific method of acquiring historical water usage data of the water purifier do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0047] Preferably, historical water usage data of the water purification equipment is obtained by acquiring data stored in the water purification equipment's storage tank.

[0048] Preferably, such as Figure 10 As shown, the steps for "determining the target cleaning time Tc based on historical water usage data and cleaning duration Ti" specifically include:

[0049] S41: Determine the idle duration T0 of the idle water period based on historical water usage data;

[0050] S42: Determine whether the cleaning time Ti is less than the idle water time T0;

[0051] S43: Based on the judgment result, determine the target cleaning time Tc.

[0052] With this setup, the idle time during which the user does not use water can be determined first based on historical water usage data. Then, it can be determined whether the target cleaning time is less than the idle water usage time. This allows it to determine whether the cleaning component can complete the cleaning of the reverse osmosis membrane filter element 2 within the idle water usage time. Based on this, the target cleaning time Tc can be determined more accurately, avoiding the impact on the normal use of the water purification equipment caused by cleaning the reverse osmosis membrane filter element 2.

[0053] It should be noted that this is not limited to determining the idle water usage time based on historical water usage data, then judging whether the target cleaning time is less than the idle water usage time, and determining the target cleaning time based on the judgment result. For example, it is also possible to directly divide the historical water usage data into multiple target cleaning periods that are compatible with the cleaning time Ti, obtain the water usage frequency within each target cleaning period, and determine the target cleaning time as the target cleaning time if the water usage frequency is lower than the preset frequency, etc. Such flexible adjustments and changes do not deviate from the principles and scope of this invention and should all be included within the protection scope of this invention.

[0054] Preferably, the idle water usage time is determined based on historical water usage data, and then it is determined whether the target cleaning time is less than the idle water usage time. The target cleaning time is then determined based on the determination result.

[0055] It should be noted that the idle duration T0 can be determined by calculating the time difference between the start time Ta and the end time Tb of the idle water period. Alternatively, a curve of water usage versus time can be plotted based on historical water usage data, and the idle duration T0 of the idle water period can be determined based on the curve. Such adjustments and changes to the specific method of obtaining the idle duration T0 of the idle water period do not deviate from the principles and scope of this invention and should be included within the protection scope of this invention.

[0056] Preferably, the step of "determining the idle water usage period T0 based on historical water usage data" specifically includes:

[0057] Based on historical water usage data, determine the start time point Ta and the end time point Tb of the idle water usage period;

[0058] The time difference between the start time point Ta and the end time point Tb is calculated as the idle time T0 of the water usage idle period.

[0059] Specifically, such as Figure 10 As shown, the steps for "determining the target cleaning time Tc based on the judgment result" specifically include:

[0060] S431: If the judgment result is "yes", then the target cleaning time Tc is between time point Ta and time point (Tb-Ti);

[0061] Where Ta represents the start time of the idle water period, Tb represents the end time of the idle water period, and (Tb-Ti) represents the time point corresponding to the time Ti before the time point Tb.

[0062] With this setting, if the judgment result is "yes", it means that the cleaning time Ti is shorter than the water idle time T0. In this case, as long as the cleaning of the reverse osmosis membrane filter element 2 can be completed within the water idle time, the normal use of the water purification equipment can be avoided due to the cleaning of the reverse osmosis membrane filter element 2. That is, as long as the cleaning of the reverse osmosis membrane filter element 2 can be started between the time point Ta and the time point (Tb-Ti), the cleaning of the reverse osmosis membrane filter element 2 can be completed within the water idle time.

[0063] For example, if Ta is 18:00, Tb is 24:00, and the cleaning duration Ti is 4 hours, then the time point (Tb-Ti) represents the time point 20:00. That is, the target cleaning time Tc is between the time point 18:00 and the time point 20:00. In other words, the cleaning component will start cleaning the reverse osmosis membrane filter element 2 no earlier than 18:00 and no later than 20:00.

[0064] For example, if Ta is 22:00, Tb is 7:00 the next day, and the cleaning duration Ti is 4 hours, then the time point (Tb-Ti) represents 3:00 the next day. That is, the target cleaning time Tc is between 22:00 and 3:00. In other words, the cleaning component will start cleaning the reverse osmosis membrane filter element 2 no earlier than 22:00 and no later than 3:00.

[0065] Specifically, such as Figure 10 As shown, the steps for "determining the target cleaning time Tc based on the judgment result" specifically include:

[0066] S432: If the judgment result is "No", then calculate the time difference ΔT = Ti - T0;

[0067] S433: Obtain the first total water consumption Q1 within the time period from time point Tb to time point (Tb+△T);

[0068] S434: Compare the first total water consumption Q1 with the preset water consumption Q0;

[0069] S435: Determine the target cleaning time Tc based on the comparison results;

[0070] Where Tb is the end time of the idle water period, and (Tb+△T) is the time point corresponding to △T time after Tb.

[0071] With this setting, if the judgment result is "no", it means that the cleaning time Ti is longer than the idle time of the water use idle period. At this time, by obtaining the first total water use Q1 in the time period from time point Tb to time point (Tb+△T), it is possible to determine whether this time period is a peak water use period. Then, based on the judgment result, the target cleaning time can be determined, which can avoid cleaning the reverse osmosis membrane filter element 2 during the peak water use period.

[0072] It should be noted that although the present invention obtains the first total water consumption Q1 within the time period from time point Tb to time point (Tb+ΔT), compares the first total water consumption Q1 with the preset water consumption Q0, and determines the target cleaning time Tc based on the judgment result, this is not limiting. For example, it is also possible to obtain the first number of water consumptions within the time period from time point Tb to time point (Tb+ΔT), compare the first number of water consumptions with the preset number of water consumptions, and determine the target cleaning time Tc based on the comparison result, etc. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention and should all be included within the protection scope of the present invention.

[0073] Specifically, such as Figure 10 As shown, the steps for "determining the target cleaning time Tc based on the comparison results" specifically include:

[0074] S4351: If Q1 < Q0, then the target cleaning time Tc is time point Ta;

[0075] S4352: If Q1≥Q0, then further obtain the second total water consumption Q2 within the time period from time point (Ta-△T) to time point Ta;

[0076] S4353: Further compare the second total water consumption Q2 with the preset water consumption Q0;

[0077] S4354: Determine the target cleaning time Tc based on further comparison results;

[0078] Wherein, (Ta-△T) represents the time point corresponding to the time △T before time point Tb.

[0079] With this setting, when Q1 < Q0, it indicates that the total water consumption during the time period from time point Tb to time point (Tb+△T) is lower than the preset water consumption, meaning that this time period is not a peak water consumption period. Cleaning the reverse osmosis membrane filter element 2 during this time period can minimize the impact of cleaning causing the water purification equipment to malfunction. When Q1 ≥ Q0, it indicates that the water consumption during the time period from time point Tb to time point (Tb+△T) is higher than the preset water consumption, meaning that this time period is a peak water consumption period. In this case, further obtaining the total water consumption during the time period from time point (Ta-△T) to time point Ta, further determining whether the △T period before the water consumption idle period belongs to the peak water consumption period, and determining the target cleaning time Tc based on the further comparison results, can avoid cleaning the reverse osmosis membrane filter element 2 during the peak water consumption period, thus improving the user experience.

[0080] Preferably, such as Figure 10 As shown, the steps for "determining the target cleaning time Tc based on further comparison results" specifically include:

[0081] S43541: If Q2 < Q0, then the target cleaning time Tc is the time point (Ta - ΔT);

[0082] S43542: If Q2≥Q0, then prompt the user so that the user can choose the cleaning method independently.

[0083] With this setting, when Q2 < Q0, it means that the total water consumption from time point (Ta-△T) to time point Ta is less than the preset water consumption, indicating that this period is not a peak water consumption period. Cleaning the reverse osmosis membrane filter 2 during this period can minimize the impact of cleaning causing the water purification equipment to malfunction. When Q2 ≥ Q0, it means that the water consumption from time point Tb to time point (Tb+△T) is higher than the preset water consumption, indicating that this period is a peak water consumption period. In other words, the time periods before and after the idle water consumption period are both peak water consumption periods. At this time, a prompt is issued to the user, reminding them that it is unavoidable to clean the reverse osmosis membrane filter 2 during peak water consumption periods. This allows the user to determine the target cleaning time based on their own choice, realizing personalized settings and further improving the user experience.

[0084] For example, if Ta is 22:00, Tb is 7:00 the next day, and the cleaning duration Ti is 9 hours, then the time point (Tb+△T) represents the time point 8:00 the next day, and the time point (Ta-△T) represents the time point 21:00. The first total water consumption Q1 from 7:00 to 8:00 the next day is obtained, and the first total water consumption Q1 is compared with the preset water consumption Q0.

[0085] If Q1 < Q0, then the target cleaning time Tc is time point 22:00, that is, the cleaning of reverse osmosis membrane filter element 2 will begin at time point 22:00.

[0086] If Q1≥Q0, then the second total water consumption Q2 during the time period from 21:00 to 22:00 is further obtained, and the second total water consumption Q2 is compared with the preset water consumption Q0; if Q2<Q0, then the target cleaning time Tc is 21:00.

[0087] Preferably, when Q2 ≥ Q0, the control method for water purification equipment of the present invention further includes the following steps:

[0088] Obtain the cleaning mode of the water purification equipment;

[0089] Based on the cleaning pattern, determine whether the cleaning process includes at least two independent sub-cleaning stages;

[0090] If the judgment result is "yes", the cleaning component will perform different sub-cleaning stages during different water idle periods.

[0091] With this setting, when Q2≥Q0, it means that the periods before and after the idle water usage time are both peak water usage periods. In this case, if the cleaning process includes at least two independent sub-cleaning stages, the cleaning component will perform different sub-cleaning stages in different idle water usage periods. That is, the cleaning component will first perform one stage of cleaning on the reverse osmosis membrane filter element 2 in one idle water usage period, and then perform another stage of cleaning on the reverse osmosis membrane filter element 2 in another idle water usage period. This can effectively avoid affecting the normal use of the water purification equipment due to cleaning the reverse osmosis membrane filter element 2.

[0092] It should be noted that the present invention does not limit the specific type of the sub-cleaning stage. For example, the sub-cleaning stage can be set to clean the reverse osmosis membrane filter element 2 with an acidic cleaning agent, clean the reverse osmosis membrane filter element 2 with an alkaline cleaning agent, or clean the reverse osmosis membrane filter element 2 with a bactericidal solution. Those skilled in the art can set it according to the actual situation, etc. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention and should be included within the protection scope of the present invention.

[0093] Preferably, the cleaning mode includes a first sub-cleaning stage and a second sub-cleaning stage. The first sub-cleaning stage involves the cleaning component using an acidic cleaning agent to clean the reverse osmosis membrane filter element 2, and the second sub-cleaning stage involves the cleaning component using an alkaline cleaning agent to clean the reverse osmosis membrane filter element 2.

[0094] It should also be noted that the present invention does not limit the specific form in which the cleaning component performs different sub-cleaning stages during different water-use idle periods. For example, based on historical data, a water-use idle period can be determined within a cycle (such as 24 hours or 48 hours), and the cleaning component can perform the first sub-cleaning stage and the second sub-cleaning stage respectively during the water-use idle periods in two adjacent cycles. Alternatively, two water-use idle periods can be determined within a cycle, and the cleaning component can perform the first sub-cleaning stage and the second sub-cleaning stage respectively during the two water-use idle periods in the same cycle, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0095] It should be noted that, in practical applications, those skilled in the art can obtain the cleaning duration Ti by the cleaning duration input by the user on the control panel of the water purifier, or they can obtain the water production data when the water purifier is in water production mode and determine the cleaning duration Ti based on the water production data. Alternatively, the cleaning duration Ti can be set to a fixed duration and embedded in the controller of the water purifier, and the cleaning duration Ti can be obtained by obtaining the data embedded in the controller, etc. Such adjustments and changes to the specific method of obtaining the cleaning duration Ti do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0096] Preferably, the step of "obtaining cleaning duration Ti" specifically includes:

[0097] Acquire water production data when the water purification equipment is in water production mode;

[0098] Based on the water production data, determine the cleaning duration Ti;

[0099] The water production data includes at least one of the following: the inlet water quality of the reverse osmosis membrane filter element 2, the cumulative water production of the reverse osmosis membrane filter element 2, the cumulative operating time of the water purification equipment, the duration during which the pure water-to-waste ratio of the reverse osmosis membrane filter element 2 is higher than the set pure water-to-waste ratio, the duration of continuous water production of the reverse osmosis membrane filter element 2 after the pre-filter reaches the end of its service life, the pure water flow rate at the pure water end of the reverse osmosis membrane filter element 2, and the pressure difference between the membrane front and the membrane back of the reverse osmosis membrane filter element 2.

[0100] Compared to the method of obtaining the cleaning time Ti by having the user input the cleaning time on the control panel of the water purifier, this setting first obtains the water production data when the water purifier is in water production mode, and then determines the cleaning time Ti based on the water production data. This allows for the prediction of the fouling level of the reverse osmosis membrane filter element 2 based on the water production data, and then determines the target cleaning time required based on the fouling level of the reverse osmosis membrane filter element 2. On the one hand, it can avoid the reverse osmosis membrane filter element 2 not being thoroughly cleaned due to the cleaning time being too short; on the other hand, it can also avoid the cleaning efficiency of the reverse osmosis membrane filter element 2 being affected by the cleaning time being too long, further improving the user experience.

[0101] It should be noted that in practical applications, the cleaning time Ti can be determined based on only one of the above water production data, or it can be determined based on any two of the above water production data, or it can be determined based on multiple of the above water production data, and so on. Such adjustments and changes to the specific method of determining the cleaning time Ti based on the water production data do not deviate from the principles and scope of the present invention, and should all be included within the protection scope of the present invention.

[0102] Preferably, the step of "determining the cleaning duration Ti based on water production data" specifically includes:

[0103] Based on the first data, the fouling level of reverse osmosis membrane filter element 2 is predicted to be A;

[0104] Based on the second data, the fouling level of reverse osmosis membrane filter element 2 is predicted to be B;

[0105] The cleaning duration Ti is determined based on the pollution level A and the clogging level B.

[0106] Among them, fouling level A is the level of possible fouling of the reverse osmosis membrane filter element, and fouling level B is the level of actual fouling of the reverse osmosis membrane filter element. The first data includes at least one of the following: the inlet water quality of the reverse osmosis membrane filter element 2, the cumulative water production of the reverse osmosis membrane filter element 2, the cumulative running time of the water purification equipment, the duration for which the pure water-to-waste water ratio of the reverse osmosis membrane filter element 2 is higher than the set pure water-to-waste water ratio, and the continuous water production time of the reverse osmosis membrane filter element 2 after the pre-filter element reaches the end of its service life; the second data includes at least one of the following: the pure water flow rate at the pure water end of the reverse osmosis membrane filter element 2, and the pressure difference between the membrane front and the membrane back of the reverse osmosis membrane filter element 2.

[0107] With this setup, since the first data directly affects the fouling level of the reverse osmosis membrane filter element 2, the potential fouling level of the reverse osmosis membrane filter element 2 can be predicted based on the first data. Since the second data can directly reflect the clogging status of the reverse osmosis membrane filter element 2, the actual fouling status of the reverse osmosis membrane filter element 2 can be more accurately reflected based on the predicted fouling level A and the predicted clogging level B of the reverse osmosis membrane filter element 2. This allows for a more accurate determination of the cleaning time Ti, further improving the user experience.

[0108] Preferably, the step of "determining the cleaning duration Ti based on the contamination level A and the clogging level B" specifically includes:

[0109] Compare pollution level A with the first preset pollution level A1;

[0110] Compare the fouling level B with the first preset fouling level B1;

[0111] Based on the comparison results, the cleaning duration Ti is determined.

[0112] Specifically, the step of "determining the cleaning duration Ti based on the comparison results" includes:

[0113] If A≤A1 and B≤B1, then the target cleaning time is T1;

[0114] If A≤A1 and B>B1, then the target cleaning time is T2;

[0115] If A > A1 and B ≤ B1, then the target cleaning time is T3;

[0116] If A > A1 and B > B1, then the target cleaning time is T4;

[0117] Where 0 < T1 < T2 < T3 < T4.

[0118] It should be noted that in practical applications, the cleaning condition can be determined to be met when the cumulative water production of the reverse osmosis membrane filter element 2 reaches the preset water production capacity; alternatively, it can be determined to be met when the cumulative operating time of the water purification equipment reaches the set time; or, it can be determined to be met when the pure water flow rate at the pure water end of the reverse osmosis membrane filter element 2 is lower than the preset flow rate; or, it can be determined to be met when the pressure difference between the membrane and the membrane of the reverse osmosis membrane filter element 2 reaches the set value. Those skilled in the art can set the conditions according to the actual situation. Such adjustments and changes to the specific judgment method for determining whether the reverse osmosis membrane filter element 2 meets the cleaning conditions do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0119] Preferably, the step of "determining whether the reverse osmosis membrane filter element 2 meets the cleaning conditions" specifically includes:

[0120] Obtain the cumulative operating time of the water purification equipment;

[0121] If the cumulative running time reaches the set time, the reverse osmosis membrane filter element 2 meets the cleaning conditions.

[0122] It should be noted that the present invention does not impose any limitations on the specific structural form of the cleaning component, as long as it can clean the reverse osmosis membrane filter element 2.

[0123] Preferably, the cleaning assembly has a cleaning agent storage component and a cleaning outlet 302. The cleaning agent storage component is used to store cleaning agent, and the cleaning outlet 302 is connected to the inlet end of the reverse osmosis membrane filter element 2 to deliver cleaning liquid to the reverse osmosis membrane filter element 2.

[0124] It should be noted that in practical applications, the cleaning component can be configured to have only a cleaning outlet 302, directly storing the cleaning liquid in the cleaning agent storage component. Alternatively, the cleaning component can be configured to have a cleaning inlet 301, through which water in the main water inlet 1 enters the cleaning agent storage component, thereby dissolving the cleaning agent in the storage component to form a cleaning liquid. Such adjustments and changes to the specific configuration of the cleaning component do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0125] Preferably, the water purification device of the present invention further includes a main water inlet 1, which is connected to the water inlet end of the reverse osmosis membrane filter element 2. The cleaning component has a cleaning inlet 301 and a cleaning outlet 302. The cleaning inlet 301 is connected to the main water inlet 1 so that water in the main water inlet 1 enters the cleaning agent storage component, thereby dissolving the cleaning agent to form a cleaning liquid. The cleaning outlet 302 is connected to the main water inlet 1 of the water purification device so that the cleaning liquid is delivered to the reverse osmosis membrane filter element 2.

[0126] By configuring the cleaning component with both a cleaning inlet 301 and a cleaning outlet 302, compared to configuring the cleaning component with only a cleaning outlet 302, it is possible to avoid storing a large amount of cleaning fluid inside the cleaning component, saving installation space for the water purification equipment and further improving the user experience.

[0127] The following two embodiments will be described in detail.

[0128] Example 1:

[0129] like Figure 1 and Figure 3As shown, the cleaning assembly includes a first cleaning module, which includes a first cleaning pipe 311, a first cleaning valve 321 disposed on the first cleaning pipe 311, and a first cleaning agent storage component 331. One end of the first cleaning pipe 311 is connected to the cleaning inlet 301, and the other end of the first cleaning pipe 311 is connected to the cleaning outlet 302. The first cleaning agent storage component 331 is located downstream of the first cleaning valve 321 and is used to store cleaning agent.

[0130] It should be noted that the present invention does not limit the type of cleaning agent in the first cleaning agent storage component 331. For example, the cleaning agent in the first cleaning agent storage component 331 can be an acidic cleaning agent, or it can be an alkaline cleaning agent. Those skilled in the art can make the selection according to actual needs. Such adjustments and changes to the specific type of cleaning agent do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0131] Example 2:

[0132] like Figure 2 and Figure 4 As shown, the cleaning assembly includes a first cleaning module and a second cleaning module arranged in parallel. The first cleaning module includes a first cleaning pipe 311, a first cleaning valve 321 disposed on the first cleaning pipe 311, and a first cleaning agent storage component 331. The second cleaning module includes a second cleaning pipe 312, a second cleaning valve 322 disposed on the second cleaning pipe 312, and a second cleaning agent storage component 332. The first ends of the first cleaning pipe 311 and the second cleaning pipe 312 meet and communicate with the cleaning inlet 301. The second ends of the first cleaning pipe 311 and the second cleaning pipe 312 meet and communicate with the cleaning outlet 302. The first cleaning agent storage component 331 is located downstream of the first cleaning valve 321, and the second cleaning agent storage component 332 is located downstream of the second cleaning valve 322.

[0133] It should be noted that in practical applications, the cleaning components are not limited to the first and second cleaning modules arranged in parallel. For example, the cleaning components can also be arranged as the first, second, and third cleaning modules arranged in parallel, etc. Such adjustments and changes to the specific number of parallel cleaning modules do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0134] It should also be noted that when cleaning the reverse osmosis membrane filter element 2, an acidic cleaning agent can be used first, followed by an alkaline cleaning agent. Alternatively, an alkaline cleaning agent can be used first, followed by an acidic cleaning agent, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of this invention and should be included within the protection scope of this invention.

[0135] For example, the reverse osmosis membrane filter element 2 is first cleaned with an acidic cleaning agent, and then the reverse osmosis membrane filter element 2 is cleaned with an alkaline cleaning agent.

[0136] It should be noted that the present invention does not limit the specific type of acidic cleaning agent. For example, the acidic cleaning agent can be at least one of malic acid, citric acid, hydrochloric acid, and phosphoric acid. Of course, the acidic cleaning agent can also be other types of acidic solutions, and those skilled in the art can make adjustments according to actual needs.

[0137] Preferably, the acidic cleaning agent is malic acid or citric acid, which not only cleans dirt but also has a good disinfection and antibacterial effect, and can disinfect and inhibit bacteria on the reverse osmosis membrane filter element 2.

[0138] It should also be noted that the present invention does not limit the specific type of alkaline cleaning agent. For example, the alkaline cleaning agent can be set to at least one of dishwashing powder, baking soda, sodium hydroxide, potassium hydroxide, calcium hydroxide, calcium oxide, sodium citrate, tetrasodium ethylenediaminetetraacetate, sodium dodecyl sulfate, sodium disulfite, and sodium bisulfite. Of course, the alkaline cleaning agent can also be other types of alkaline solutions, and those skilled in the art can make adjustments according to actual needs.

[0139] Preferably, such as Figures 1 to 4 As shown, a first check valve 341 is provided on the first cleaning pipe 311 and / or the second cleaning pipe 312. The first check valve 341 is located at the downstream end of the first cleaning agent storage component 331 and / or the second cleaning agent storage component 332 and can prevent water in the main water inlet 1 from entering the first cleaning agent storage component 331 and / or the second cleaning agent storage component 332 through the cleaning outlet 302.

[0140] By setting the first one-way valve 341, when the water purification equipment is in normal water production mode, it can prevent water in the main inlet 1 from flowing back into the detergent storage component, thereby avoiding the detergent from dissolving and entering the reverse osmosis membrane filter element 2 under normal water production mode. At the same time, since the cost of the one-way valve is significantly lower than that of the control valve, compared with setting the control valve, setting the one-way valve to prevent water in the main inlet 1 from entering the detergent storage component through the cleaning outlet 302 can further save the cost of the water purification equipment.

[0141] It should be noted that cleaning the reverse osmosis membrane filter element 2 is not limited to the cleaning mode of soaking the reverse osmosis membrane filter element 2 with cleaning solution. For example, a cleaning mode can be used to clean the reverse osmosis membrane filter element 2 by setting up a circulation pipe, so that the cleaning component, the inlet end of the reverse osmosis membrane filter element 2 and the wastewater end of the reverse osmosis membrane filter element 2 are connected in sequence to form a cleaning circuit, and the cleaning solution is driven to circulate in the cleaning circuit to clean the reverse osmosis membrane filter element 2 by rinsing it multiple times. Such adjustments and changes to the specific cleaning method of cleaning the reverse osmosis membrane filter element 2 with cleaning solution do not deviate from the principle and scope of the present invention, and should be included within the protection scope of the present invention.

[0142] Preferably, such as Figures 5 to 8 As shown, the water purification device of the present invention also includes a circulation pipe 61. The first end of the circulation pipe 61 is connected to the wastewater end of the reverse osmosis membrane filter element 2, and the second end of the circulation pipe 61 is connected to the cleaning component, so that the cleaning component, the inlet end of the reverse osmosis membrane filter element 2 and the wastewater end of the reverse osmosis membrane filter element 2 are connected in sequence to form a cleaning circuit. The water purification device is configured to drive the cleaning liquid to circulate in the cleaning circuit.

[0143] By setting up the circulation pipe 61, the cleaning component, the inlet end of the reverse osmosis membrane filter element 2, and the wastewater end of the reverse osmosis membrane filter element 2 can be connected in sequence to form a cleaning circuit. When cleaning the reverse osmosis membrane filter element 2, the cleaning liquid can be circulated in the cleaning circuit to flush the reverse osmosis membrane filter element 2 multiple times, which helps to remove dirt from the reverse osmosis membrane filter element 2 and improves the cleaning effect and cleaning efficiency.

[0144] It should be noted that the present invention does not limit the specific driving method for driving the cleaning fluid to circulate in the cleaning circuit. For example, a circulation pump can be set on the cleaning circuit to drive the cleaning fluid to circulate in the cleaning circuit. Alternatively, a booster pump located between the cleaning outlet 302 and the reverse osmosis membrane filter element 2 on the main water inlet 1 can be used to drive the cleaning fluid to circulate in the cleaning circuit. Such adjustments and changes to the specific driving method for driving the cleaning fluid to circulate in the cleaning circuit of the water purification equipment do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0145] Preferably, such as Figures 5 to 8 As shown, the water purification device of the present invention also includes a circulation pump 62 and a booster pump 12. The cleaning outlet 302 is connected to the main water inlet 1 and is located at the downstream end of the booster pump 12. The circulation pump 62 is installed on the cleaning circuit and is used to drive the cleaning liquid to circulate in the cleaning circuit.

[0146] With this configuration, compared to the method of driving the liquid circulation flow in the cleaning circuit by the booster pump 12, the method of driving the liquid circulation flow in the cleaning circuit by setting the circulation pump 62 can prevent the cleaning liquid from entering the booster pump 12 and damaging the diaphragm of the booster pump 12, thereby avoiding affecting the service life of the booster pump 12. Furthermore, by setting the cleaning outlet 302 to be located at the downstream end of the booster pump 12, the cleaning liquid can be prevented from flowing through the booster pump 12 and damaging the diaphragm of the booster pump 12. Since the cost of the circulation pump 62 is much lower than that of the booster pump 12, the cost of the water purification equipment can be greatly reduced, further improving the user experience.

[0147] When the cleaning component cleans the reverse osmosis membrane filter element 2, water in the main inlet channel 1 is first introduced into the first cleaning agent storage component 331 or the second cleaning agent storage component 332 to dissolve the cleaning agent and form a cleaning solution. The cleaning solution is then transported into the reverse osmosis membrane filter element 2. The circulation pump 62 is then started to allow the cleaning solution to enter the first cleaning agent storage component 331 or the second cleaning agent storage component 332 from the wastewater end of the reverse osmosis membrane filter element 2 through the circulation pipe 61, the first cleaning pipe 311 or the second cleaning pipe 312, and then transported into the reverse osmosis membrane filter element 2. This allows the cleaning solution to circulate in the cleaning circuit, thereby flushing the reverse osmosis membrane filter element 2, removing dirt from it, and cleaning the reverse osmosis membrane filter element 2.

[0148] It should be noted that before the cleaning solution circulates in the cleaning circuit, the reverse osmosis membrane filter element 2 can be soaked in the cleaning solution first, or the circulation pump 62 can be started intermittently to circulate the cleaning solution in the cleaning circuit.

[0149] It should also be noted that the present invention does not limit the specific location of the circulation pump 62 in the cleaning circuit. For example, the circulation pump 62 can be set on the circulation pipe 61, or it can be set on the first cleaning pipe 311, the second cleaning pipe 312 or the manifold 35, or it can be set on the main water inlet 1 and located at the water inlet of the cleaning outlet 302 and the reverse osmosis membrane filter element 2, etc. Such adjustments and changes to the specific location of the circulation pump 62 in the cleaning circuit do not deviate from the principle and scope of the present invention and should be included within the protection scope of the present invention.

[0150] Preferably, such as Figure 5 and Figure 7 As shown, in the case where the cleaning assembly only includes the first cleaning module, the circulation pump 62 is installed on the first cleaning pipe 311.

[0151] Preferably, such as Figure 6 and Figure 8As shown, in the case where the cleaning assembly includes a first cleaning module and a second cleaning module, the second ends of the first cleaning pipe 311 and the second cleaning pipe 312 meet and communicate with the manifold 35. The end of the manifold 35 forms a cleaning outlet 302, and the circulation pump 62 is installed on the manifold 35.

[0152] Preferably, such as Figures 5 to 8 As shown, the water purification device of the present invention also includes a second one-way valve 342, which is disposed between the clean outlet 302 and the circulation pump 62 and is capable of resisting the water pressure in the main water inlet 1.

[0153] When the water purification equipment is in normal water production mode, the water pressure in the main inlet line 1 is relatively high. In order to reduce costs and increase efficiency, a low-cost, non-pressure-resistant water pump is selected as the circulation pump 62. By setting a second one-way valve 342, the water pressure in the main inlet line 1 can be resisted, preventing water in the main inlet line 1 from entering the circulation pump 62 and preventing leakage of the circulation pump 62 due to excessive water pressure in the main inlet line 1.

[0154] Preferably, such as Figure 6 and Figure 8 As shown, the water purification equipment also includes a diversion pipe 36 and a diversion valve 361 installed on the diversion pipe 36. One end of the diversion pipe 36 forms a cleaning inlet 301, and the first ends of the first cleaning pipe 311 and the second cleaning pipe 312 converge and are connected to the other end of the diversion pipe 36.

[0155] By setting up the diversion pipe 36, when the cleaning fluid circulates in the cleaning circuit, it can prevent the cleaning fluid from flowing back into the main water inlet 1 through the cleaning inlet 301, thus avoiding contamination of the main water inlet 1.

[0156] Preferably, such as Figures 1 to 8 As shown, the water purification equipment also includes a pure water outlet pipe 5 and a pure water user component 51. The pure water user component 51 is connected to the pure water end of the reverse osmosis membrane filter element 2 through the pure water outlet pipe 5. The pure water user component 51 is used to output the water from the pure water end of the reverse osmosis membrane filter element 2 for users to drink.

[0157] It should be noted that, in practical applications, those skilled in the art can directly configure the pure water component 51 as a water outlet component (such as a faucet or spout), with the filtered pure water flowing out from the faucet or spout for user use. Alternatively, the pure water component 51 can be configured as a post-filter, with the filtered pure water flowing into the post-filter to improve the taste for user use. Or, the pure water component 51 can be configured as a pure water tank, with the pure water filtered by the reverse osmosis membrane filter 2 flowing into the pure water tank for storage for user use, and so on. Such adjustments and changes to the specific configuration of the pure water component 51 do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0158] Preferably, the pure water component 51 is a post-filter.

[0159] Preferably, after the cleaning component has finished cleaning the reverse osmosis membrane filter element and started the water production mode, the control method of the present invention further includes the following steps:

[0160] Connect the pure water end of the reverse osmosis membrane filter element 2 to the main inlet water pipe 1 and / or the wastewater outlet pipe 21.

[0161] With this setup, after the cleaning component cleans the reverse osmosis membrane filter element 2, a small amount of cleaning agent will permeate to the pure water end of the reverse osmosis membrane filter element 2, connecting the pure water end of the reverse osmosis membrane filter element 2 to the main inlet water line 1 and / or the wastewater outlet pipe 21 of the water purification equipment. This allows a small amount of water containing cleaning agent to be discharged from the pure water end of the reverse osmosis membrane filter element 2, helping to achieve zero additives and zero chemical pollution, and further improving the user experience.

[0162] It should be noted that the connection is not limited to linking the pure water end of the reverse osmosis membrane filter element 2 to the inlet end of the reverse osmosis membrane filter element 2 and / or the wastewater outlet pipe 21 of the water purification equipment. For example, the pure water end of the reverse osmosis membrane filter element 2 can also be connected to the drain outlet of the water purification equipment, or the pure water end of the reverse osmosis membrane filter element 2 can be connected to the sewer pipe in the user's usage scenario, etc. Such adjustments and changes to the specific method of discharging pure water containing a small amount of detergent from the pure water end of the reverse osmosis membrane filter element 2 do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention. Of course, preferably, the pure water end of the reverse osmosis membrane filter element 2 is connected to the inlet end of the reverse osmosis membrane filter element 2 and / or the wastewater outlet pipe 21 of the water purification equipment.

[0163] The following two scenarios will be discussed in detail.

[0164] Scenario 1:

[0165] Preferably, such as Figures 1 to 2 , Figures 5 to 6 As shown, the water purification equipment also includes a return pipe 23 and a return valve 231. The first end of the return pipe 23 can be connected to the pure water end of the reverse osmosis membrane filter element 2, and the second end of the return pipe 23 is connected to the main water inlet 1. The return valve 231 is installed on the return pipe 23 and is used to control the opening and closing of the return pipe 23.

[0166] By setting up a return pipe 23 and a return valve 231, after the cleaning component has finished cleaning the reverse osmosis membrane filter element 2, the water from the pure water end of the reverse osmosis membrane filter element 2 can be transported to the main water inlet 1 through the return pipe. After multiple filtrations by the reverse osmosis membrane filter element 2, the small amount of cleaning agent remaining at the pure water end of the reverse osmosis membrane filter element 2 is discharged, which helps to achieve zero addition and zero chemical pollution, and greatly improves the user experience.

[0167] Scenario 2:

[0168] like Figures 3 to 4 , Figures 7 to 8 As shown, the water purification equipment also includes a wastewater outlet pipe 21, a drain pipe 22, and a drain valve 221 installed on the drain pipe 22. The wastewater outlet pipe 21 is connected to the wastewater end of the reverse osmosis membrane filter element 2. One end of the drain pipe 22 is connected to the pure water outlet pipe 5, and the other end of the drain pipe 22 is connected to the wastewater outlet pipe 21.

[0169] By setting up a drain pipe 22 and a drain valve 221, after the cleaning component has finished cleaning the reverse osmosis membrane filter element 2, the water from the pure water end of the reverse osmosis membrane filter element 2 can be transported to the wastewater outlet pipe 21 through the return pipe, thereby directly discharging the water containing a small amount of cleaning agent to the outside of the water purification equipment, which helps to achieve zero additives and zero chemical pollution, and further improves the user experience.

[0170] It should be noted that by setting up the return pipe 23 and the return valve 231, or the drain pipe 22 and the drain valve 221, it is possible to prevent water with a high TDS at the pure water end of the reverse osmosis membrane filter element 2 from being delivered to the pure water use component 51 when the water purification equipment is not producing water for a long time, thus solving the problem of "high TDS value of the first cup of water".

[0171] Preferably, after connecting the pure water end of the reverse osmosis membrane filter element 2 to the main inlet pipe 1 and / or the wastewater outlet pipe 21, the control method of the present invention further includes:

[0172] Obtain the current TDS value of the pure water end of reverse osmosis membrane filter element 2;

[0173] Determine if the current TDS value is lower than the preset TDS value;

[0174] Based on the judgment result, the pure water end of the reverse osmosis membrane filter element 2 is selectively connected to the pure water use component 51.

[0175] With this setting, it is possible to determine whether the current TDS value of the pure water end of the reverse osmosis membrane filter element 2 is lower than the preset TDS value, thereby determining whether the small amount of residual cleaning agent at the pure water end of the reverse osmosis membrane filter element 2 has been completely discharged. After the cleaning agent is completely discharged, the pure water end of the reverse osmosis membrane filter element 2 can be connected to the pure water component 51 in a timely manner to avoid wasting water and extend the service life of the reverse osmosis membrane filter element 2.

[0176] It should be noted that the current TDS value can be detected by directly connecting the pure water end of the reverse osmosis membrane filter element 2, or a water quality detection frame can be set on the pure water outlet pipe 5 to detect the current TDS value.

[0177] Specifically, the step of "selectively connecting the pure water end of the reverse osmosis membrane filter element 2 to the pure water use component 51 based on the judgment result" includes:

[0178] If the judgment result is "yes", then connect the pure water end of the reverse osmosis membrane filter element 2 to the pure water use component 51;

[0179] If the judgment result is "no", then the pure water end of the reverse osmosis membrane filter element 2 will not be connected to the pure water use component 51.

[0180] With this setting, if the judgment result is "yes", it means that the small amount of cleaning agent remaining at the pure water end of the reverse osmosis membrane filter element 2 has been completely discharged. At this time, connecting the pure water end of the reverse osmosis membrane filter element 2 to the pure water use component 51 in time can avoid wasting water. If the judgment result is "no", it means that the small amount of cleaning agent remaining at the pure water end of the reverse osmosis membrane filter element 2 has not been completely discharged. At this time, not connecting the pure water end of the reverse osmosis membrane filter element 2 to the pure water use component 51 can completely discharge the small amount of cleaning agent remaining at the pure water end of the reverse osmosis membrane filter element 2.

[0181] It should be noted that the determination of whether to connect the pure water end of the reverse osmosis membrane filter element 2 to the pure water component 51 is not limited to detecting the current TDS value of the pure water end of the reverse osmosis membrane filter element 2. For example, the determination can also be made by detecting the current pH value of the pure water end of the reverse osmosis membrane filter element 2. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention. Of course, preferably, the determination of whether to connect the pure water end of the reverse osmosis membrane filter element 2 to the pure water component 51 is made by detecting the current TDS value of the pure water end of the reverse osmosis membrane filter element 2.

[0182] Preferably, such as Figures 1 to 8 As shown, the water purification device of the present invention also includes a pre-filter unit 4, the outlet of the pre-filter unit 4 is connected to the main water inlet 1, and the cleaning inlet 301 is located at the downstream end of the pre-filter unit 4.

[0183] With this configuration, by placing the cleaning inlet 301 downstream of the pre-filter unit 4, the purified water filtered by the pre-filter unit 4 can enter the cleaning agent storage component 33 through the cleaning inlet 301. The purified water filtered by the pre-filter unit 4 can be used to dissolve the cleaning agent, thereby improving the solubility of the cleaning agent and the cleanliness of the cleaning solution, thus effectively improving the cleaning effect of the reverse osmosis membrane filter element 2.

[0184] It should be noted that, in practical applications, those skilled in the art can set the pre-filter unit 4 as a pre-filter cartridge, or they can set the pre-filter unit 4 as a composite cartridge including a pre-filter cartridge and a post-filter cartridge, etc. Such adjustments and changes to the specific type of the pre-filter unit 4 do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0185] Preferably, the pre-filter unit 4 is a pre-filter cartridge.

[0186] Preferably, such as Figures 1 to 8 As shown, the water purification equipment also includes an inlet valve 11 installed on the main inlet water line 1, with a cleaning inlet 301 located at the upstream end of the inlet valve 11 and a cleaning outlet 302 located at the downstream end of the inlet valve 11.

[0187] With this setup, when the reverse osmosis membrane filter element 2 needs to be cleaned, the water in the main water inlet 1 can be prevented from directly entering the reverse osmosis membrane filter element 2 by controlling the water inlet valve 11, thereby avoiding dilution of the cleaning solution entering the reverse osmosis membrane filter element 2.

[0188] Preferably, the water purification device of the present invention further includes a wastewater valve 211 installed on the wastewater outlet pipe 21. When the water purification device is in water production mode, the wastewater valve 211 is adjusted to the water production position. When the cleaning component cleans the reverse osmosis membrane filter element 2, the wastewater valve 211 can prevent the cleaning liquid in the reverse osmosis membrane filter element 2 from flowing out through the wastewater outlet pipe 21. After the cleaning component has finished cleaning the reverse osmosis membrane filter element 2, the wastewater valve 211 is adjusted to the rinsing position, so that the cleaning liquid in the reverse osmosis membrane filter element 2 flows out through the wastewater outlet pipe 21.

[0189] In a second aspect, the present invention also provides a water purification device, the water purification device including a controller configured to perform any of the control methods for a water purification device described above.

[0190] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A control method for a water purification device, characterized in that, The water purification equipment includes a reverse osmosis membrane filter element and a cleaning component. The cleaning component is capable of cleaning the reverse osmosis membrane filter element. The control method includes the following steps: Determine whether the reverse osmosis membrane filter element meets the cleaning requirements; When the reverse osmosis membrane filter element meets the cleaning conditions, acquire the historical water usage data of the water purification equipment; Obtain the cleaning duration Ti; Based on the historical water usage data and the cleaning duration Ti, the target cleaning time Tc is determined; The cleaning component begins cleaning the reverse osmosis membrane filter element at the target cleaning time Tc.

2. The control method for a water purification device according to claim 1, characterized in that, The step of "determining the target cleaning time Tc based on the historical water usage data and the cleaning duration" specifically includes: Based on the historical water usage data, determine the idle duration T0 of the idle water usage period; Determine whether the cleaning time Ti is less than the idle water time T0; Based on the judgment result, the target cleaning time Tc is determined.

3. The control method for a water purification device according to claim 2, characterized in that, The step of "determining the target cleaning time Tc based on the judgment result" specifically includes: If the judgment result is "yes", then the target cleaning time Tc is between time point Ta and time point (Tb-Ti); And / or, if the judgment result is "no", then calculate the time difference ΔT = Ti - T0; Obtain the first total water consumption Q1 within the time period from time point Tb to time point (Tb+△T); Compare the first total water consumption Q1 with the preset water consumption Q0; Based on the comparison results, the target cleaning time Tc is determined; Wherein, Ta is the start time of the idle water period, Tb is the end time of the idle water period, (Tb-Ti) is the time point corresponding to the Ti time before the Tb time point, and (Tb+ΔT) is the time point corresponding to the ΔT time after the Tb time point.

4. The control method for a water purification device according to claim 3, characterized in that, The step of "determining the target cleaning time Tc based on the comparison results" specifically includes: If Q1 < Q0, then the target cleaning time Tc is time point Ta; And / or, if Q1≥Q0, then further obtain the second total water consumption Q2 within the time period from time point (Ta-△T) to time point Ta; The second total water consumption Q2 is further compared with the preset water consumption Q0; Based on further comparison results, the target cleaning time Tc is determined; Where (Ta-△T) is the time point corresponding to △T time before time point Ta.

5. The control method for a water purification device according to claim 4, characterized in that, The step of "determining the target cleaning time Tc based on further comparison results" specifically includes: If Q2 < Q0, then the target cleaning time Tc is the time point (Ta - ΔT); And / or, if Q2≥Q0, then prompt the user.

6. The control method for a water purification device according to claim 4, characterized in that, When Q2 ≥ Q0, the control method further includes the following steps: Obtain the cleaning mode of the water purification equipment; Based on the cleaning mode, determine whether the cleaning process includes at least two independent sub-cleaning stages; If the judgment result is "yes", then the cleaning component will perform different sub-cleaning stages during different water-use idle periods.

7. The control method for a water purification device according to claim 1, characterized in that, The specific steps for "obtaining cleaning duration Ti" include: Obtain water production data when the water purification device is in water production mode; Based on the water production data, determine the cleaning duration Ti; The water production data includes at least one of the following: the inlet water quality of the reverse osmosis membrane filter cartridge, the cumulative water production of the reverse osmosis membrane filter cartridge, the cumulative operating time of the water purification equipment, the duration during which the pure water-to-waste ratio of the reverse osmosis membrane filter cartridge is higher than the set pure water-to-waste ratio, the continuous water production time of the reverse osmosis membrane filter cartridge after the pre-filter cartridge reaches the end of its service life, the pure water flow rate at the pure water end of the reverse osmosis membrane filter cartridge, and the pressure difference between the membrane and the membrane of the reverse osmosis membrane filter cartridge.

8. The control method for a water purification device according to claim 7, characterized in that, The water production data includes first data and second data. The steps for "determining the cleaning duration Ti based on water production data" specifically include: Based on the first data, predict the fouling level A of the reverse osmosis membrane filter element; Based on the second data, predict the fouling level B of the reverse osmosis membrane filter element; The cleaning duration Ti is determined based on the pollution level A and the clogging level B. Wherein, the pollution level A is the level at which the reverse osmosis membrane filter element may be polluted, and the fouling level B is the level at which the reverse osmosis membrane filter element is actually polluted. The first data includes at least one of the following: the inlet water quality at the inlet end of the reverse osmosis membrane filter element, the cumulative water production of the reverse osmosis membrane filter element, the cumulative operating time of the water purification equipment, the duration for which the pure water-to-waste ratio of the reverse osmosis membrane filter element is higher than the set pure water-to-waste ratio, and the continuous water production time of the reverse osmosis membrane filter element after the pre-filter element reaches the end of its service life. The second data includes at least one of the following: the pure water flow rate at the pure water end of the reverse osmosis membrane filter element, and the pressure difference between the membrane front and back of the reverse osmosis membrane filter element.

9. The control method for a water purification device according to claim 1, characterized in that, The steps for "determining whether the reverse osmosis membrane filter element meets the cleaning conditions" specifically include: The cumulative operating time of the water purification equipment is obtained. If the cumulative operating time reaches a set time, the reverse osmosis membrane filter element meets the cleaning conditions. And / or, obtain the cumulative water production of the reverse osmosis membrane filter element; if the cumulative water production reaches the preset water production, the reverse osmosis membrane filter element meets the cleaning conditions. And / or, obtain the pure water flow rate at the pure water end of the reverse osmosis membrane filter element; if the pure water flow rate is lower than the preset flow rate, the reverse osmosis membrane filter element meets the cleaning conditions. And / or, obtain the pressure difference between the front and back of the reverse osmosis membrane filter element; if the pressure difference is greater than a preset pressure difference, the reverse osmosis membrane filter element meets the cleaning conditions.

10. A water purification device, characterized in that, The water purification device includes a controller configured to perform any one of the control methods for the water purification device according to claims 1 to 9.

Images