Water purification method and system, water purifier, storage medium and computer program product

Abstract

The invention relates to the technical field of automation, and provides a water purification method and system, a water purifier, a storage medium and a computer program product.The method comprises the steps that in the water purification process based on a capacitive deionization water purification system, the accumulated water purification amount of the capacitive deionization water purification system between the target moment and the current moment is determined; the target moment is the moment of cleaning an electrode in the capacitive deionization water purification system for the last time before the current moment; if the moment for cleaning the electrode in the capacitive deionization water purification system does not exist, the target moment is a water purification starting moment when the capacitive deionization water purification system performs water purification for the first time; and determining that the accumulated water purification amount is greater than or equal to a preset water purification amount threshold value, and cleaning an electrode in the capacitive deionization water purification system. By accurately judging the cleaning requirement, the electrode in the capacitive deionization water purification system can be cleaned in time, it is ensured that the electrode can efficiently purify water for a long time, and then the water purification efficiency of the water purification system can be improved.

Description

Technical Field

[0001] The present application relates to the field of automation technology, and in particular to a water purification method, system, water purifier, storage medium and computer program product. Background Art

[0002] With the continuous improvement of living standards, people's requirements for water are getting higher and higher. Currently, capacitive deionization (CDI) technology can be used to improve water quality. Specifically, a water purification system based on capacitive deionization technology can be used for water purification.

[0003] However, traditional household CDI water purification systems are prone to electrode scaling problems during long-term use, resulting in a decrease in the water purification efficiency of the water purification system. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the related art. To this end, the present application proposes a water purification method, which can improve the water purification efficiency of a water purification system.

[0005] The present application also proposes a water purification system, a water purifier, a storage medium and a computer program product.

[0006] The water purification method according to the first embodiment of the present application includes: In the process of water purification based on the capacitor deionization water purification system, the cumulative water purification amount of the capacitor deionization water purification system between the target time and the current time is determined; the target time is the time when the electrodes in the capacitor deionization water purification system are cleaned for the last time before the current time; wherein, if there is no time for cleaning the electrodes in the capacitor deionization water purification system, the target time is the time when the capacitor deionization water purification system starts to purify water for the first time; Determine that the accumulated clean water volume is greater than or equal to a preset clean water volume threshold, and clean the electrodes in the capacitive deionization water purification system.

[0007] According to the water purification method of the embodiment of the present application, in the process of water purification based on the capacitor deionization water purification system, if the electrodes in the capacitor deionization water purification system have not been cleaned, then when the cumulative amount of clean water between the moment when the capacitor deionization water purification system starts to purify water for the first time and the current moment is greater than or equal to the preset water purification threshold, the electrodes in the capacitor deionization water purification system are cleaned; otherwise, when the cumulative amount of clean water between the moment when the electrodes in the capacitor deionization water purification system were last cleaned and the current moment is greater than or equal to the preset water purification threshold, the electrodes in the capacitor deionization water purification system are cleaned. Thus, by accurately judging the cleaning needs, the electrodes in the capacitor deionization water purification system can be cleaned in time to ensure that the electrodes in the capacitor deionization water purification system can purify water efficiently for a long time, thereby improving the water purification efficiency of the water purification system.

[0008] According to one embodiment of the present application, the cleaning of the electrodes in the capacitive deionization water purification system includes: The electrodes in the capacitive deionization water purification system are controlled to operate in the reverse polarity of the current polarity and the flushing structure is controlled to clean the electrodes, so as to clean the electrodes in the capacitive deionization water purification system.

[0009] According to one embodiment of the present application, in the process of purifying water based on a capacitive deionization water purification system, the process further includes: Determining the desalination rate of the capacitive deionization water purification system according to a first salt content of the influent water flow before water purification and a second salt content of the effluent water flow after water purification; Determine that the desalination rate is less than a preset desalination rate threshold, control the electrodes in the capacitive deionization water purification system to operate in the reverse polarity of the current polarity, and control the injector to operate to inject a cleaning agent for the electrodes into the capacitive deionization water purification system.

[0010] According to one embodiment of the present application, determining the desalination rate of the capacitive deionization water purification system according to the first salt content of the influent water flow before water purification and the second salt content of the effluent water flow after water purification includes: Determining a difference in salinity between a first salinity of an influent water flow before water purification and a second salinity of an effluent water flow after water purification; The ratio between the salt content difference and the first salt content is determined as the desalination rate of the capacitive deionization water purification system.

[0011] According to one embodiment of the present application, in the process of purifying water based on a capacitive deionization water purification system, the process further includes: Determining water quality data of an inlet water flow of the capacitive deionization water purification system; Determining target operating parameters of the capacitor deionization water purification system according to the inlet water quality data; The operation of the capacitor deionization water purification system is controlled according to the target operating parameters to process the inlet water flow of the inlet water quality data to the target water quality data.

[0012] According to one embodiment of the present application, after controlling the operation of the capacitor deionization water purification system according to the target operating parameters, the method further includes: Determine the effluent water quality data of the effluent stream after water purification treatment; Determine that the difference between the target water quality data and the outlet water quality data is greater than a preset threshold, and adjust the operating parameters of the capacitive deionization water purification system.

[0013] According to one embodiment of the present application, the adjusting the operating parameters of the capacitive deionization water purification system includes: Determine the difference as the current error, and obtain the historical error; Determine the parameter to be adjusted according to the current error and the historical error in combination with a preset proportional gain coefficient, a preset integral gain coefficient and a preset differential gain coefficient; The operating parameters of the capacitive deionization water purification system are adjusted according to the parameters to be adjusted.

[0014] According to an embodiment of the present application, the step of determining the parameter to be adjusted based on the current error and the historical error in combination with a preset proportional gain coefficient, a preset integral gain coefficient, and a preset differential gain coefficient includes: Multiply the current error by the preset proportional gain coefficient to obtain the proportional adjustment parameter; Determine the sum of each error in the historical error and the current error, and multiply the sum by a preset integral gain coefficient to obtain an integral adjustment parameter; Determine the error difference between the current error and the target error in the historical errors, and multiply the error difference by a preset differential gain coefficient to obtain a differential adjustment parameter; the target error is the error with the smallest time difference between the recorded time and the current time in the historical errors; The proportional adjustment parameter, the integral adjustment parameter and the differential adjustment parameter are added together to obtain a parameter to be adjusted.

[0015] The water purification system according to the second aspect of the present application is characterized in that it includes a control system and a computer program stored in the control system, and when the computer program is executed by the control system, it implements any of the water purification methods described above.

[0016] The water purifier according to the third aspect of the present application includes a housing, a control system and a computer program stored in the control system, and when the control system executes the computer program, any one of the water purification methods described above is implemented.

[0017] According to the storage medium of the fourth aspect of the present application, the storage medium is a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements any of the water purification methods described above.

[0018] The computer program product according to the fifth aspect of the present application includes a computer program, which, when executed by a processor, implements any of the water purification methods described above.

[0019] The above one or more technical solutions in the embodiments of the present application have at least the following technical effects: In the process of water purification based on the capacitor deionization water purification system, if the electrodes in the capacitor deionization water purification system have not been cleaned, the electrodes in the capacitor deionization water purification system are cleaned when the cumulative amount of clean water between the moment when the capacitor deionization water purification system starts to purify water for the first time and the current moment is greater than or equal to the preset water purification threshold; otherwise, the electrodes in the capacitor deionization water purification system are cleaned when the cumulative amount of clean water between the moment when the electrodes in the capacitor deionization water purification system were cleaned last time and the current moment is greater than or equal to the preset water purification threshold. Therefore, by accurately judging the cleaning needs, the electrodes in the capacitor deionization water purification system can be cleaned in time to ensure that the electrodes in the capacitor deionization water purification system can purify water efficiently for a long time, thereby improving the water purification efficiency of the water purification system.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the process of the water purification method provided in the embodiment of the present application; Figure 2 It is a schematic diagram of the architecture of the water purification system provided in the embodiment of the present application; Figure 3 It is a schematic diagram of the overall control flow of the water purification system provided in the embodiment of the present application; Figure 4 It is a structural schematic diagram of the water purifier provided in this application. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the implementation of the present application in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but cannot be used to limit the scope of the present application.

[0024] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0026] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0028] Figure 1 It is a schematic diagram of the process of the water purification method provided in the embodiment of the present application, such as Figure 1 As shown, the water purification method comprises: Step 110, in the process of water purification based on the capacitive deionization water purification system, determine the cumulative water purification volume of the capacitive deionization water purification system between the target time and the current time; the target time is the time when the electrodes in the capacitive deionization water purification system were last cleaned before the current time; wherein, if there is no time for cleaning the electrodes in the capacitive deionization water purification system, then the target time is the start time of water purification when the capacitive deionization water purification system performs water purification for the first time.

[0029] Step 120, determining that the accumulated clean water volume is greater than or equal to a preset clean water volume threshold, and cleaning the electrodes in the capacitive deionization water purification system.

[0030] It should be noted that the water purification method provided in the embodiment of the present application can be applied to a water purification system, which can specifically be a capacitive deionization water purification system, namely a CDI water purification system (hereinafter referred to as a water purification system).

[0031] Figure 2 Schematic diagram of the water purification system provided in the embodiment of the present application. Figure 2 As shown, the capacitive deionization water purification system in the present application may include a water inlet, a clean water outlet, a wastewater outlet, an intelligent control system (hereinafter referred to as a control system), a cleaning system, a CDI core processing unit and a post-processing module, wherein the control system includes a deep cleaning module, a self-cleaning module and a performance monitoring module, and the performance monitoring module can display monitoring data through a mobile application or a touch screen user interface for users to remotely monitor system performance. The cleaning system may include a flushing control valve, a cleaning agent injection pump and a cleaning agent storage tank. The CDI core processing unit includes a reverse current processing circuit and a CDI electrode group.

[0032] The executor of the water purification method provided in the present application may be a control system in a water purification system.

[0033] The pre-treatment module in the water purification system of the present application can filter large-size impurities from the inlet water flowing in from the water inlet. The water treated by the pre-treatment module flows to the CDI core processing unit, and the CDI core processing unit can perform water purification on the inlet water flow through the CDI electrode group therein, and the outlet water flow after the water purification treatment can flow to the post-treatment module, and the post-treatment module can perform disinfection treatment on the outlet water flow, and the purified water after disinfection treatment can flow out from the water purification outlet.

[0034] It should be noted that after the water purification system of the present application is started, it can perform self-checking through the control system, specifically checking whether the status of key components such as power supply, sensor, electrode, pump, etc. is in a fault state, thereby ensuring that all components are working properly. During the operation of the water purification system, the monitoring content can also be displayed in real time through the mobile application or the user interface in the touch screen through the performance monitoring module, so that users can remotely monitor and control.

[0035] When all components are working normally, the valve of the water inlet in the capacitor deionization water purification system can be controlled to open, so that the water source can flow from the water inlet into the pretreatment module for filtration, and flow to the CDI core processing unit after filtration, and perform water purification in the CDI core processing unit. The effluent water flow after the water purification by the CDI core processing unit can flow to the post-processing module, and then the effluent water flow can be disinfected by the post-processing module, and finally the disinfected water can flow out from the water purification outlet.

[0036] The execution subject of this application may be a control system in a water purification system. The control system may control various components in the water purification system, such as controlling valve switches, controlling CDI electrode group switches, controlling reverse current processing circuit switches, controlling various component switches in the cleaning system, and so on.

[0037] It is understandable that the electrodes in the CDI electrode group of the water purification system will absorb ions in the water during the water purification process, thereby achieving the purpose of water purification. However, during the water purification process, the electrodes will scale, and scaling will reduce the water purification ability of the electrodes. At this time, the electrodes need to be cleaned to restore the water purification ability of the electrodes. The cumulative water purification volume has a great relationship with the scaling of the electrodes. The greater the cumulative water purification volume, the easier it is for the electrodes to scale or the more scaling there is.

[0038] Therefore, a flow meter may also be provided at the water outlet of the water purification system of the present application, so as to monitor the water output of the water purification system in real time. It should also be noted that the present application starts counting the cumulative water volume at the moment when the capacitor deionization water purification system starts to purify water for the first time, resets the current cumulative water volume to zero each time the electrodes in the capacitor deionization water purification system are cleaned, and restarts counting the cumulative water volume after each cleaning of the electrodes in the capacitor deionization water purification system is completed. Therefore, the moment at that time can be recorded each time the electrodes in the capacitor deionization water purification system are cleaned. The flow meter can transmit the information of the cumulative water volume to the control system.

[0039] Based on this, in the process of water purification based on the capacitor deionization water purification system, if the electrodes in the capacitor deionization water purification system have not been cleaned at present, the cumulative amount of clean water between the start of water purification when the capacitor deionization water purification system first performs water purification and the current moment is obtained. If the electrodes in the capacitor deionization water purification system have been cleaned, the cumulative amount of clean water between the last time the electrodes in the capacitor deionization water purification system were cleaned before the current moment and the current moment is obtained.

[0040] Furthermore, the present application may also pre-set a clean water volume threshold based on experience or other methods (such as artificial intelligence). When the cumulative clean water volume of the water purification system reaches the clean water volume threshold, it can be considered that the electrode needs to be cleaned.

[0041] Therefore, after obtaining the current cumulative clean water volume, the control system can compare the cumulative clean water volume with the preset clean water volume threshold, thereby determining the size relationship between the cumulative clean water volume and the preset clean water volume threshold.

[0042] Furthermore, if it is determined that the cumulative amount of purified water is greater than or equal to a preset purified water threshold, it is considered that the electrodes in the capacitive deionization water purification system have been scaled and affected its water purification capacity, so it can be determined to clean the electrodes in the capacitive deionization water purification system.

[0043] Specifically, the control system of the present application can start the program in the self-cleaning scheduling module to control the operation of related components, thereby cleaning the electrodes in the capacitive deionization water purification system and restoring the water purification capacity of the electrodes.

[0044] According to the water purification method of the embodiment of the present application, in the process of water purification based on the capacitor deionization water purification system, if the electrodes in the capacitor deionization water purification system have not been cleaned, then when the cumulative amount of clean water between the moment when the capacitor deionization water purification system starts to purify water for the first time and the current moment is greater than or equal to the preset water purification threshold, the electrodes in the capacitor deionization water purification system are cleaned; otherwise, when the cumulative amount of clean water between the moment when the electrodes in the capacitor deionization water purification system were last cleaned and the current moment is greater than or equal to the preset water purification threshold, the electrodes in the capacitor deionization water purification system are cleaned. Thus, by accurately judging the cleaning needs, the electrodes in the capacitor deionization water purification system can be cleaned in time to ensure that the electrodes in the capacitor deionization water purification system can purify water efficiently for a long time, thereby improving the water purification efficiency of the water purification system.

[0045] Based on the above embodiment, the process of purifying water based on the capacitive deionization water purification system may include: Determine the inlet water quality data of the inlet water flow of the capacitive deionization water purification system; Determine the target operating parameters of the capacitor deionization water purification system based on the inlet water quality data; The operation of the capacitor deionization water purification system is controlled according to the target operating parameters to process the inlet water flow of the inlet water quality data to the target water quality data.

[0046] It should be noted that the CDI core processing unit of the water purification system of the present application may also be provided with a water quality detector, which can detect the water quality of the influent water flow after being treated by the pretreatment module, obtain the influent water quality data and transmit it to the control system. Among them, the water quality data in the present application may be total dissolved solids (TDS).

[0047] Therefore, the control system can obtain the inlet water quality data of the inlet water flow collected by the water quality detector.

[0048] The present application may set a program in the control system for matching the operating parameters of the capacitor deionization water purification system in the water purification system according to the input water quality data. For example, a matching rule or a matching table may be set. The specific matching process is not limited in the present application and can be set according to the existing technology. Among them, the operating parameters of the above-mentioned capacitor deionization water purification system refer to the operating parameters required to process the inlet water flow of the inlet water quality data to the target water quality data. Among them, the operating parameters of the present application may be one or more combinations of the operating voltage, operating current and operating time of the electrode.

[0049] The present application may also deploy an artificial intelligence model in the control system for predicting the operating parameters of the capacitive deionization water purification system in the water purification system based on the input water quality data. Specifically, the control system may pre-acquire the sample inlet water quality data and the sample operating parameters, and the sample operating parameters represent the operating parameters of the electrodes in the CDI electrode group when the sample inlet water flow is processed from the sample inlet water quality data to the target water quality data. The target water quality data is the water quality data set according to the actual water use standard or other requirements.

[0050] Furthermore, multiple sample inlet water quality data and sample operating parameters are used as training data, and the artificial intelligence model constructed according to the scenario of the present application is trained based on the training data. After completing the model training, a target prediction model is obtained that can predict the operating parameters of the water purification system electrodes based on the input water quality data.

[0051] It should be noted that the present application does not specifically limit the modeling process and model parameters. A new model can be constructed and new parameters can be set, or an existing model and its parameters can be used.

[0052] Therefore, after receiving the inlet water quality data of the inlet water flow, the control system of the present application can determine the operating parameters of the electrodes in the water purification system according to the inlet water quality data through the program or artificial intelligence model therein and use them as the target operating parameters.

[0053] After obtaining the target operating parameters of the electrodes in the capacitive deionization water purification system, the control system can control the electrodes in the CDI electrode group to operate according to the target operating parameters, thereby purifying the influent water flow through the electrodes in the CDI electrode group to process the influent water flow from the influent water quality data to the target water quality data. It should be noted that the target water quality data is the water quality data that is expected to be achieved. In the water purification process, various factors may cause the water quality data after the water purification treatment to fail to reach the target water quality data.

[0054] Therefore, after controlling the operation of the capacitor deionization water purification system according to the target operating parameters, it also includes: Determine the effluent water quality data of the effluent stream after water purification treatment; Determine that the difference between the target water quality data and the outlet water quality data is greater than a preset threshold, and adjust the operating parameters of the capacitive deionization water purification system.

[0055] Specifically, a water quality detector may also be provided at the purified water outlet of the CDI core processing unit of the present application, which can detect the water quality of the effluent water flow after the purified water treatment, obtain the effluent water quality data and transmit it to the control system.

[0056] Therefore, the control system can obtain the effluent water quality data of the effluent water flow after the water purification treatment.

[0057] Furthermore, in the present application, the control system can obtain water quality data pre-set by the user based on actual needs as target water quality data, and the target water quality data is the water quality data that the user expects to achieve after water purification treatment.

[0058] Furthermore, the control system may perform a difference operation between the target water quality data and the outlet water quality data, and compare the obtained difference with a threshold value pre-set according to actual needs, thereby determining the size relationship between the difference and the preset threshold value.

[0059] Furthermore, if it is determined that the difference is greater than the preset threshold, it can be considered that there is a large difference between the outlet water quality data and the target water quality data, that is, the water quality of the outlet water flow after water purification cannot meet the user's expected water quality. Therefore, the control system can determine that the operating parameters of the electrodes in the CDI electrode group need to be adjusted.

[0060] Specifically, the present application can adjust the operating parameters of the electrodes in the CDI electrode group through the PID algorithm, where PID is the abbreviation of Proportional, Integral, and Differential.

[0061] This application adjusts the operating parameters of the electrodes in the CDI electrode group when the water quality does not meet the standards after water purification treatment, optimizes the water purification effect, and thereby improves the water purification efficiency of the water purification system.

[0062] Furthermore, the operating parameters of the capacitive deionization water purification system are adjusted, including: The difference is determined as the current error, and the historical error is obtained; According to the current error and the historical error, the parameter to be adjusted is determined in combination with the preset proportional gain coefficient, the preset integral gain coefficient and the preset differential gain coefficient; Adjust the operating parameters of the capacitor deionization water purification system according to the parameters to be adjusted.

[0063] Further, according to the current error and the historical error, the parameters to be adjusted are determined in combination with the preset proportional gain coefficient, the preset integral gain coefficient and the preset differential gain coefficient, including: Multiply the current error by the preset proportional gain coefficient to obtain the proportional adjustment parameter; Determine the sum of each error in the historical error and the current error, multiply the sum by a preset integral gain coefficient, and obtain an integral adjustment parameter; Determine the error difference between the current error and the target error in the historical error, multiply the error difference by the preset differential gain coefficient to obtain the differential adjustment parameter; the target error is the error with the smallest time difference between the recorded time and the current time in the historical error; The proportional adjustment parameter, the integral adjustment parameter and the differential adjustment parameter are added together to obtain the parameter to be adjusted.

[0064] Specifically, when adjusting the operating parameters of the capacitor deionization water purification system, the control system can determine the difference between the target water quality data and the outlet water quality data as the current error, and obtain the historical errors recorded in the historical operation of the water purification system from the storage information. The historical errors can include multiple specific errors and the recording time of each error.

[0065] Furthermore, the proportional gain coefficient, the integral gain coefficient and the differential gain coefficient set in advance according to the actual demand can be set in advance according to the actual demand. The proportional gain coefficient, the integral gain coefficient and the differential gain coefficient set in advance according to the actual demand can also be respectively referred to as proportional constants, integral constants and differential constants, and different values ​​can be set for different control objects. For example, a set of proportional constants, integral constants and differential constants can be set for voltage operating parameters, and another set of proportional constants, integral constants and differential constants can be set for current operating parameters.

[0066] Furthermore, the current error may be multiplied by a preset proportional gain coefficient, and the product may be used as a proportional adjustment parameter.

[0067] And, the sum of each error in the historical error and the current error is calculated, the sum is multiplied by a preset integral gain coefficient, and the product is used as an integral adjustment parameter.

[0068] And, determine the error with the smallest time difference between the recorded time and the current time in the historical errors and use it as the target error, further calculate the error difference between the current error and the target error in the historical errors, multiply the error difference by the preset differential gain coefficient, and use the product as the differential adjustment parameter.

[0069] The proportional adjustment parameter, the integral adjustment parameter and the differential adjustment parameter are summed, and the result of the summation is used as the parameter to be adjusted.

[0070] Furthermore, the operating parameters of the capacitive deionization water purification system can be updated according to the parameters to be adjusted, and specifically, parameter compensation can be performed to achieve adjustment of the operating parameters.

[0071] For example, if the operating parameter is the operating voltage, the operating voltage of the electrodes in the CDI electrode group of the capacitive deionization water purification system is compensated by the above-determined new operating voltage on the basis of the original operating voltage to obtain a new operating voltage; if the operating parameter is the operating current, the operating current of the electrodes in the CDI electrode group of the capacitive deionization water purification system is compensated by the above-determined new operating current on the basis of the original operating current to obtain a new operating current.

[0072] This application adjusts the operating parameters of the capacitive deionization water purification system to optimize the water purification effect when the water quality does not meet the standards after water purification treatment, thereby improving the water purification efficiency of the water purification system.

[0073] Based on the above embodiment, the above step 120 includes: Step 121, controlling the electrodes in the capacitor deionization water purification system to operate in the reverse polarity of the current polarity and controlling the flushing structure to clean the electrodes, so as to clean the electrodes in the capacitor deionization water purification system.

[0074] Specifically, the control system of the present application can control the reverse current processing circuit in the CDI core processing unit of the capacitive deionization water purification system to start, thereby performing reverse current on each electrode in the CDI electrode group, so that each electrode operates in the reverse polarity of the current polarity. Based on the principle opposite to the adsorption of ions by the electrode, when the electrode operates in reverse polarity, the ions adsorbed on the electrode will be desorbed. Furthermore, the control system can also control the flushing control valve of the flushing structure in the cleaning system to open, flush the electrode through the flushing structure, thereby flushing away the ions that have been desorbed from the electrode, and achieving electrode cleaning.

[0075] Specifically, in one embodiment, the electrode can be controlled to operate at a voltage of 2.5 volts and a reverse current of 1.5 amps for three to five minutes to remove slight deposits on the electrode surface and maintain electrode performance.

[0076] The present application reverses the polarity of the electrodes to desorb the ions adsorbed by the electrodes, thereby achieving electrode cleaning, ensuring that the electrodes in the capacitive deionization water purification system can purify water efficiently for a long time, thereby improving the water purification efficiency of the water purification system.

[0077] Based on the above embodiment, after the above step 120, the following step is further included: Step A, determining the desalination rate of the capacitive deionization water purification system according to a first salt content of the influent water flow before water purification and a second salt content of the effluent water flow after water purification; Step B, determining that the desalination rate is less than a preset desalination rate threshold, controlling the electrodes in the capacitor deionization water purification system to operate in the reverse polarity of the current polarity and controlling the injector to operate to inject a cleaning agent for the electrodes into the capacitor deionization water purification system.

[0078] Furthermore, the above step A includes: Step A1, determining the difference in salinity between a first salinity of an influent water flow before water purification and a second salinity of an effluent water flow after water purification; Step A2: Determine the ratio between the salt content difference and the first salt content as the desalination rate of the capacitive deionization water purification system.

[0079] Specifically, the present application can also set a salt content detection instrument such as a salinity meter or refractometer at the water source inlet and the purified water outlet of the water purification system, respectively. Therefore, the salt content detection instrument can be used to detect the salt content of the incoming water flow before water purification as the first salt content and detect the salt content of the outgoing water flow after water purification as the second salt content.

[0080] Furthermore, a difference operation may be performed between a first salt content of the inlet water flow before water purification and a second salt content of the outlet water flow after water purification, and the result of the difference operation is used as the salt content difference.

[0081] Furthermore, a ratio operation is performed between the salt content difference and the first salt content, and a result of the ratio operation is determined as the desalination rate of the capacitive deionization water purification system.

[0082] Furthermore, the desalination rate is compared with a desalination rate threshold value set in advance according to actual needs, thereby determining the magnitude relationship between the desalination rate and the preset desalination rate threshold value.

[0083] If it is determined that the desalination rate is less than the preset desalination rate threshold, it is determined that deep cleaning is required. Therefore, the control system can enable the program of the deep cleaning control module, and control the electrodes in the capacitor deionization water purification system to operate in the reverse polarity of the current polarity by running the reverse current processing circuit in the CDI core processing unit, and at the same time control the detergent injection pump as a syringe to operate to inject the detergent in the detergent storage tank into the electrodes of the capacitor deionization water purification system. In this way, chemical cleaning and physical cleaning of scale on the electrode can be achieved. Furthermore, the flushing control valve of the flushing structure in the cleaning system is controlled to open, and the electrode is flushed through the flushing structure, so as to flush away the ions that have been desorbed from the electrode, and achieve deep cleaning of the electrode.

[0084] Specifically, in one embodiment, after injecting the CDI cleaning agent into the electrode, the electrode can be controlled to run at a voltage of 3 volts and a reverse current of 2 amps for 15 minutes (where 15 minutes can be divided into 3 times, 5 minutes each time) to thoroughly clean the electrode and restore system performance. Wherein, the cleaning agent is automatically injected into the system during multiple cleanings, with a capacity of 100 ml each time.

[0085] The multi-step cleaning process includes: a) automatic system draining; b) injection of special cleaning agent; c) starting a strong reverse current (3 volts, 2 amps) for 15 minutes; d) draining the cleaning solution; e) flushing with clean water 3 times, 5 minutes each time.

[0086] This application continuously monitors the performance of the water purification system through the desalination rate before and after water purification. When the desalination rate is lower than the threshold, the electrodes are deeply cleaned to ensure the water purification ability of the electrodes in the capacitive deionization water purification system, thereby improving the water purification efficiency of the water purification system.

[0087] It should be noted that in the present application, the performance monitoring module can also push cleaning reminders and performance reports to users in real time. Users can perform remote monitoring and control based on the information pushed by the performance monitoring module, and can remotely start the self-cleaning scheduling module or deep cleaning control module with one click.

[0088] It should be further noted that a security protection mechanism may also be provided in the present application, specifically: Automatically cuts off water flow during reverse current treatment and cleaning.

[0089] Automatic flushing program after treatment ensures safe water quality.

[0090] Automatic alarm and protection measures for abnormal situations.

[0091] Through the above scheme, the water purification system of the present application can more accurately judge the cleaning needs, provide a more effective cleaning process, and allow users to more intuitively understand the system status. This can not only extend the service life of the CDI system, but also ensure that the system maintains efficient operation for a long time, greatly improving the user experience.

[0092] Figure 3 is a schematic diagram of the overall control flow of the water purification system provided in the embodiment of the present application, such as Figure 3 As shown, in one embodiment, after the system is started, self-checking and initialization can be performed to check the status of all components. Further, water quality parameters such as TDS, PH, flow rate, etc. can be read. Further, water purification treatment is performed according to the control principle of optimizing treatment parameters based on influent water quality. Specifically, the initial CDI parameters such as voltage, current and treatment time can be calculated according to the read water quality parameters and then the CDI treatment is started.

[0093] Furthermore, the water purification performance can be detected in real time, specifically, the outlet water TDS or electrode voltage can be monitored. Further, water purification can be performed according to the control principle of closed-loop feedback control, specifically, it can be determined whether the water quality after purification reaches the target water quality. If not, the CDI parameters can be dynamically adjusted through the PID control algorithm to purify the water; if it reaches the standard, the treated water can be output, and it can be determined whether the cumulative treated water volume is greater than the set value. If it does not reach the set value, the system status is updated. If it has reached the set value, the reverse current treatment is performed according to the parameters of 2.5V, 1.5A, and 3-5 minutes of treatment, and then the system status is updated. Thus, the electrode is cleaned based on the control principle of regular maintenance to extend the life of the electrode.

[0094] Furthermore, the performance of the water purification system can be analyzed, specifically the desalination rate can be calculated, and the deep cleaning of the electrodes can be further performed based on the control principle of dynamically adjusting the maintenance frequency according to the performance. If the desalination rate is greater than or equal to the threshold, the system will be on standby to wait for a new processing request; if it is determined that the desalination rate is less than the threshold, the deep cleaning program will be started, thereby injecting the CDI cleaning fluid as a cleaning agent, and at the same time executing a strong reverse current according to the parameters of 3V, 2A, and 15 minutes of processing, and flushing the system according to the requirements of 3 times, each time for 15 minutes. Further, the processing cycle will be restarted.

[0095] This application has at least the following advantages: Extend the service life of CDI electrodes and maintain efficient water purification performance; Routine maintenance is performed automatically without user intervention; Intelligent annual deep cleaning to restore the system to optimal performance; Real-time monitoring and remote control to improve user experience; Reduce maintenance costs and frequency, and improve product competitiveness.

[0096] The present application also provides a water purification system, which may include a control system and a computer program stored in the control system, and when the computer program is executed by the control system, the following method is performed: In the process of water purification based on the capacitor deionization water purification system, the cumulative water purification amount of the capacitor deionization water purification system between the target time and the current time is determined; the target time is the time when the electrodes in the capacitor deionization water purification system are cleaned for the last time before the current time; wherein, if there is no time for cleaning the electrodes in the capacitor deionization water purification system, the target time is the time when the capacitor deionization water purification system starts to purify water for the first time; Determine that the accumulated clean water volume is greater than or equal to a preset clean water volume threshold, and clean the electrodes in the capacitive deionization water purification system.

[0097] Figure 4 The following is an example of a schematic diagram of the physical structure of a water purifier: Figure 4 As shown, the electronic device may include: a housing and a control system, wherein the control system includes a processor 410, a communication interface 420, a memory 430 and a communication bus 440, wherein the processor 410, the communication interface 420 and the memory 430 communicate with each other through the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute the following method: in the process of water purification based on the capacitor deionization water purification system, determine the cumulative amount of water purification of the capacitor deionization water purification system between the target moment and the current moment; the target moment is the moment when the electrodes in the capacitor deionization water purification system are cleaned for the last time before the current moment; wherein, if there is no moment when the electrodes in the capacitor deionization water purification system are cleaned, the target moment is the moment when the capacitor deionization water purification system starts to purify water for the first time; Determine that the accumulated clean water volume is greater than or equal to a preset clean water volume threshold, and clean the electrodes in the capacitive deionization water purification system.

[0098] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the relevant technology. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0099] On the other hand, the embodiment of the present application further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by the processor to execute the methods provided in the above embodiments, for example, including: in the process of water purification based on the capacitor deionization water purification system, determining the cumulative water purification amount of the capacitor deionization water purification system between the target time and the current time; the target time is the time when the electrodes in the capacitor deionization water purification system are cleaned for the last time before the current time; wherein, if there is no time for cleaning the electrodes in the capacitor deionization water purification system, the target time is the time when the capacitor deionization water purification system starts to purify water for the first time; Determine that the accumulated clean water volume is greater than or equal to a preset clean water volume threshold, and clean the electrodes in the capacitive deionization water purification system.

[0100] On the other hand, the embodiments of the present application further provide a computer program product having a computer program stored thereon, which is implemented when the computer program is executed by a processor to execute the methods provided in the above embodiments, for example, including: in the process of water purification based on a capacitive deionization water purification system, determining the cumulative water purification amount of the capacitive deionization water purification system between a target time and a current time; the target time is the time when the electrodes in the capacitive deionization water purification system were cleaned for the last time before the current time; wherein, if there is no time for cleaning the electrodes in the capacitive deionization water purification system, the target time is the time when the capacitive deionization water purification system starts water purification for the first time; Determine that the accumulated clean water volume is greater than or equal to a preset clean water volume threshold, and clean the electrodes in the capacitive deionization water purification system.

[0101] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0102] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment.

[0103] Finally, it should be noted that the above implementation modes are only used to illustrate the present application, rather than to limit the present application. Although the present application is described in detail with reference to the embodiments, a person skilled in the art should understand that various combinations, modifications or equivalent substitutions of the technical solutions of the present application do not depart from the spirit and scope of the technical solutions of the present application.

Claims

1. A water purification method, characterized in that: include: In a process of water purification based on a capacitive deionization water purification system, determining a cumulative amount of water purified by the capacitive deionization water purification system between a target time and a current time; The target time is the time when the electrodes in the capacitor deionization water purification system were cleaned for the last time before the current time; if there is no time when the electrodes in the capacitor deionization water purification system are cleaned, the target time is the time when the capacitor deionization water purification system starts to purify water for the first time; Determine that the accumulated clean water volume is greater than or equal to a preset clean water volume threshold, and clean the electrodes in the capacitive deionization water purification system.

2. The water purification method according to claim 1, characterized in that: The cleaning of the electrodes in the capacitive deionization water purification system comprises: The electrodes in the capacitive deionization water purification system are controlled to operate in the reverse polarity of the current polarity and the flushing structure is controlled to clean the electrodes, so as to clean the electrodes in the capacitive deionization water purification system.

3. The water purification method according to claim 1, characterized in that: In the process of water purification based on capacitive deionization water purification system, it also includes: Determining the desalination rate of the capacitive deionization water purification system according to a first salt content of the influent water flow before water purification and a second salt content of the effluent water flow after water purification; Determine that the desalination rate is less than a preset desalination rate threshold, control the electrodes in the capacitive deionization water purification system to operate in the reverse polarity of the current polarity, and control the injector to operate to inject a cleaning agent for the electrodes into the capacitive deionization water purification system.

4. The water purification method according to claim 3, characterized in that: Determining the desalination rate of the capacitive deionization water purification system according to the first salt content of the influent water flow before water purification and the second salt content of the effluent water flow after water purification includes: Determining a difference in salinity between a first salinity of an influent water flow before water purification and a second salinity of an effluent water flow after water purification; The ratio between the salt content difference and the first salt content is determined as the desalination rate of the capacitive deionization water purification system.

5. The water purification method according to claim 1, characterized in that: In the process of water purification based on capacitive deionization water purification system, it also includes: Determining water quality data of an inlet water flow of the capacitive deionization water purification system; Determining target operating parameters of the capacitor deionization water purification system according to the inlet water quality data; The operation of the capacitor deionization water purification system is controlled according to the target operating parameters to process the inlet water flow of the inlet water quality data to the target water quality data.

6. The water purification method according to claim 5, characterized in that: After controlling the operation of the capacitor deionization water purification system according to the target operating parameters, the method further includes: Determine the effluent water quality data of the effluent stream after water purification treatment; Determine that the difference between the target water quality data and the outlet water quality data is greater than a preset threshold, and adjust the operating parameters of the capacitive deionization water purification system.

7. The water purification method according to claim 6, characterized in that: The adjusting of the operating parameters of the capacitive deionization water purification system includes: Determine the difference as the current error, and obtain the historical error; Determine the parameter to be adjusted according to the current error and the historical error in combination with a preset proportional gain coefficient, a preset integral gain coefficient and a preset differential gain coefficient; The operating parameters of the capacitive deionization water purification system are adjusted according to the parameters to be adjusted.

8. The water purification method according to claim 7, characterized in that: The step of determining the parameter to be adjusted according to the current error and the historical error in combination with a preset proportional gain coefficient, a preset integral gain coefficient and a preset differential gain coefficient includes: Multiply the current error by the preset proportional gain coefficient to obtain the proportional adjustment parameter; Determine the sum of each error in the historical error and the current error, and multiply the sum by a preset integral gain coefficient to obtain an integral adjustment parameter; Determine the error difference between the current error and the target error in the historical errors, and multiply the error difference by a preset differential gain coefficient to obtain a differential adjustment parameter; the target error is the error with the smallest time difference between the recorded time and the current time in the historical errors; The proportional adjustment parameter, the integral adjustment parameter and the differential adjustment parameter are added together to obtain a parameter to be adjusted.

9. A water purification system, characterized in that: It comprises a control system and a computer program stored in the control system, and when the computer program is executed by the control system, it implements the water purification method according to any one of claims 1 to 8.

10. A water purifier, comprising a housing, a control system and a computer program stored in the control system, characterized in that: When the control system executes the computer program, the water purification method according to any one of claims 1 to 8 is implemented.

11. A storage medium, the storage medium being a non-transitory computer-readable storage medium, on which a computer program is stored, characterized in that: When the computer program is executed by a processor, the water purification method according to any one of claims 1 to 8 is implemented.

12. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the water purification method according to any one of claims 1 to 8 is implemented.

Images