Water purification system and control method and control device thereof

Abstract

The application provides a water purification system and a control method and device thereof. The control method comprises the following steps: obtaining pre-filtration water data and post-filtration water data at a target filter element of the water purification system, determining a life attenuation value of the target filter element according to the pre-filtration water data and the post-filtration water data, and adjusting the preset cleaning frequency of the target filter element according to the size relationship between the life attenuation value and a preset attenuation value. According to the technical scheme of the application, the water usage information including local water quality can be determined according to the pre-filtration water data and the post-filtration water data of the corresponding filter element, and then the cleaning frequency of the filter element can be flexibly adjusted according to the water usage information, so that the service life of the filter element is ensured.

Description

Technical Field

[0001] This invention relates to the field of water purification equipment technology, and in particular to a water purification system and its control method and control device. Background Technology

[0002] Since the purification effect of a water purifier relies on the adsorption and interception capacity of its filter cartridge, the cartridge must be replaced before it becomes ineffective at trapping contaminants, ensuring the user's drinking water experience and safety. Therefore, the filter cartridge becomes the most important consumable during the subsequent use of a water purifier; the lifespan of the water purifier directly determines the user's operating costs. The nominal lifespan of a water purifier is mainly limited by the filter cartridge's processing capacity; therefore, during use, the filter cartridge needs to be cleaned periodically through rinsing or other methods to restore its filtration capacity to a certain extent.

[0003] Currently, most water purification systems on the market clean their filters periodically using preset cleaning frequencies. However, water quality varies across different regions, and different water qualities correspond to different filtration loads for the filters. Therefore, adjusting the filter cleaning frequency according to water quality is clearly the best approach. This not only ensures the filter's lifespan but also conserves water resources. Consequently, existing water purification systems are insufficient in their flexibility regarding adjusting filter cleaning frequencies. Summary of the Invention

[0004] To address the problem that existing water purification systems do not flexibly adjust the filter cleaning frequency based on actual water usage, this invention proposes a water purification system and its control method and device.

[0005] In a first aspect, the present invention provides a water purification control method, comprising the following steps:

[0006] Obtain the pre-filtration and post-filtration purified water data at the target filter element of the water purification system, and determine the lifespan attenuation value of the target filter element based on the pre-filtration and post-filtration purified water data.

[0007] Based on the relationship between the lifespan decay value and the preset decay value, the frequency of cleaning the target filter element is adjusted by floating.

[0008] In one embodiment, determining the lifespan degradation value of the target filter element based on the pre-filtration purified water data and the post-filtration purified water data includes:

[0009] The removal rate of the target filter element is determined based on the difference between the corresponding index parameters in the pre-filtration purified water data and the post-filtration purified water data.

[0010] The removal rate is obtained multiple times, and the lifespan attenuation value of the target filter element is determined based on the results of the multiple removal rates obtained.

[0011] In one embodiment, the frequency of cleaning the target filter element is adjusted based on a preset cleaning frequency according to the relationship between the lifespan decay value and a preset value, including:

[0012] When the lifespan decay value exceeds the preset decay upper limit value, the cleaning frequency of the target filter element is adjusted upward based on the preset cleaning frequency to increase the cleaning frequency.

[0013] When the lifespan decay value is less than the preset decay lower limit value, the cleaning frequency of the target filter element is adjusted downward based on the preset cleaning frequency to reduce the cleaning frequency.

[0014] In one embodiment, both the pre-filtration purified water data and the post-filtration purified water data include one or more of the following: total TOC value, COD value, and water flow rate value.

[0015] In one embodiment, for a pretreatment filter cartridge located in the first position of the water inlet path, the pre-filtration purified water data and the post-filtration purified water data are obtained by a first detection unit and a second detection unit respectively located at its water inlet and water outlet.

[0016] For the first filter element located in the second position of the water inlet path, the pre-filtration purified water data is obtained by the second detection unit located at its water inlet end. Then, the water filtered by the first filter element is returned to the water inlet end of the first filter element through a return pipeline connected to the water outlet end of the first filter element, and the post-filtration purified water data is obtained by the second detection unit.

[0017] In one implementation, it further includes:

[0018] The water flow rate value of the first filter element is determined based on the water flow rate data in the pre-filtration purified water data and the post-filtration purified water data of the first filter element.

[0019] When the water flow rate is less than the preset flow rate, the lifespan of the first filter element is determined to be expired, and a replacement prompt signal is output.

[0020] In one implementation, it further includes:

[0021] When the cleaning cycle corresponding to the cleaning frequency is reached, the target filter element is cleaned according to the corresponding cleaning mode;

[0022] For the pretreatment filter cartridge set in the first position of the water inlet path, according to the corresponding heating regeneration cleaning mode, the heating unit is started to heat the water input from the water source into the pretreatment filter cartridge for a first preset time, and then the heated water is discharged through the wastewater pipe and continuously rinsed for a second preset time.

[0023] For the first filter element located in the second position of the water inlet path, according to the corresponding rinsing and cleaning mode, water is continuously supplied from the water source through the pre-treatment filter element to the first filter element for a third preset time, and the rinsing water is discharged through the wastewater pipeline.

[0024] In one implementation, it further includes:

[0025] The removal rate of the pretreatment filter cartridge is determined based on the pre-filtration purified water data and the post-filtration purified water data of the pretreatment filter cartridge.

[0026] When the removal rate is less than the set value, the pre-treatment filter element is immediately regenerated and cleaned by heating, and the heating unit is operated at maximum power and the continuous rinsing time is extended.

[0027] In one implementation, it further includes:

[0028] The removal rate of the pretreatment filter cartridge is determined based on the pre-filtration purified water data and the post-filtration purified water data of the pretreatment filter cartridge.

[0029] If the removal rate falls within the set range and the removal rate is still within the set range after heating and regeneration cleaning, the pretreatment filter cartridge is determined to have reached the end of its lifespan, and a replacement prompt signal is output.

[0030] In one implementation, it further includes:

[0031] The temperature value of the water in the pretreatment filter cartridge is determined based on the temperature data in the filtered purified water data of the pretreatment filter cartridge.

[0032] When the temperature value is lower than the lower limit, the heating unit installed in the pretreatment filter element is activated to heat the water to the upper limit.

[0033] Secondly, the present invention provides a water purification control device, comprising:

[0034] The data acquisition and processing module is used to acquire the pre-filtration purified water data and post-filtration purified water data at the target filter element of the water purification system, and determine the lifespan attenuation value of the target filter element based on the pre-filtration purified water data and the post-filtration purified water data.

[0035] A cleaning frequency adjustment module is used to adjust the cleaning frequency of the target filter element based on the relationship between the lifespan decay value and a preset decay value; and

[0036] The cleaning control module is used to clean the target filter element according to the corresponding cleaning mode when the cleaning cycle is reached, based on the adjusted cleaning frequency.

[0037] Thirdly, the present invention proposes a water purification system that applies the above-mentioned water purification control method, which includes a pretreatment filter cartridge and a first filter cartridge connected sequentially by a pipeline in the water inlet direction. A first detection unit is provided on the pipeline before the water inlet end of the pretreatment filter cartridge, and a second detection unit is provided on the pipeline between the water outlet end of the pretreatment filter cartridge and the water inlet end of the first filter cartridge.

[0038] The outlet of the first filter element is connected to a return pipe, and the end of the return pipe is connected to the pipe between the outlet of the pretreatment filter element and the second detection unit.

[0039] In one embodiment, both the first detection unit and the second detection unit include one or more of the following: a TDS detection probe, a turbidity detection probe, a pH probe, a TOC analyzer, a COD analyzer, a temperature probe, a flow meter, and a pressure detection device.

[0040] The above-mentioned technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the present invention can be achieved.

[0041] The water purification system and its control method and device provided by the present invention have at least the following advantages compared with the prior art:

[0042] The present invention discloses a water purification system and its control method and control device. By using the pre-filtration and post-filtration water purification data of the corresponding filter element, water usage information, including local water quality, can be determined. In this way, the cleaning frequency of the filter element can be flexibly adjusted according to the water usage information to ensure the service life of the filter element. Attached Figure Description

[0043] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0044] Figure 1 A flowchart of the water purification control method of the present invention is shown;

[0045] Figure 2 A schematic diagram of the water purification system of the present invention is shown.

[0046] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0047] Figure label:

[0048] 1-Pretreatment filter element, 11-Pretreatment wastewater pipeline, 12-Heating unit, 2-First filter element, 21-First wastewater pipeline, 3-First detection unit, 4-Second detection unit, 5-Return pipeline, 6-Pressure stabilizing pump, 7-Second filter element. Detailed Implementation

[0049] The invention will now be further described with reference to the accompanying drawings.

[0050] Example 1

[0051] An embodiment of the present invention provides a water purification control method, comprising the following steps:

[0052] S100: Obtain the pre-filtration and post-filtration purified water data at the target filter element of the water purification system, and determine the lifespan decay value of the target filter element based on the pre-filtration and post-filtration purified water data; the pre-filtration and post-filtration purified water data both include one or more of the following: total TOC value, COD value, and water flow rate value.

[0053] S110: Determine the removal rate of the target filter element based on the difference between the corresponding index parameters in the pre-filtration water purification data and the post-filtration water purification data.

[0054] S120: Obtain the removal rate multiple times, and determine the lifespan decay value of the target filter element based on the results of the multiple removal rates obtained.

[0055] Specifically, for a given filter cartridge, its filtration capacity is also fixed. Therefore, the water quality of the area where the application is located is one of the determining factors for the data related to the filtered water. Thus, the pre-filtration and post-filtration water quality data of the target filter cartridge can reflect the water quality of the area where the application is located, and is therefore related to the lifespan of the target filter cartridge. So, the lifespan degradation value of the target filter cartridge is first determined by comparing the pre-filtration and post-filtration water quality data.

[0056] Furthermore, by comparing the purified water data before and after filtration, the differences in parameters such as TOC and COD can be calculated, which represents the removal rate N of the target filter element. By collecting the removal rate data of the target filter element multiple times, the filter element lifespan attenuation value A can be obtained. The principle is that by comparing the differences in multiple removal rates obtained separately, the change in filtration efficiency can be determined, which in turn determines the degree of attenuation of the target filter element's lifespan, i.e., the lifespan attenuation value.

[0057] S200: Based on the relationship between the lifespan decay value and the preset decay value, the cleaning frequency of the target filter element is adjusted by floating. The cleaning cycle corresponding to the cleaning frequency can be expressed by the continuous running time of the water purification system or the total flow rate of filtered water.

[0058] S210: When the lifespan decay value exceeds the preset decay upper limit, the cleaning frequency of the target filter element is adjusted upward based on the preset cleaning frequency to increase the cleaning frequency.

[0059] S220: When the lifespan decay value is less than the preset decay lower limit value, the cleaning frequency of the target filter element is adjusted downward based on the preset cleaning frequency to reduce the cleaning frequency.

[0060] Specifically, when the lifespan decay value A exceeds the preset upper limit, it indicates that the water quality in the application scenario is poor, and the filter element's lifespan decays excessively. Therefore, the cleaning frequency needs to be increased beyond the preset cleaning frequency, the cleaning cycle shortened, and the cleaning effect improved each time to fully extend the target filter element's lifespan. When the lifespan decay value A is less than the preset lower limit, it indicates that the water quality in the application scenario is good, and the filter element's lifespan decay is relatively small. Therefore, the cleaning frequency can be reduced beyond the preset cleaning frequency, and the cleaning cycle extended to address water resource issues. When the lifespan decay value A is between the preset upper and lower limits, it indicates that the water quality in the application scenario is moderate, and the filter element's lifespan decay is normal. Therefore, the cleaning frequency can be maintained at the preset cleaning frequency.

[0061] In addition, raw water quality data can be obtained at the very beginning of the water inlet pipe of the water purification system. The water quality can be directly judged by the raw water quality data. When the raw water quality is poor, the cleaning frequency of all filter elements can be automatically increased to prevent the filter elements from being easily clogged.

[0062] S300: Based on the adjusted cleaning frequency, the target filter element is cleaned according to the corresponding cleaning mode when the cleaning cycle is reached.

[0063] S310: For the pretreatment filter cartridge located in the first position of the water inlet path, according to the corresponding heating regeneration cleaning mode, the heating unit located in the pretreatment filter cartridge is activated to heat the water input from the water source into the pretreatment filter cartridge for a first preset time, and then the heated water is discharged through the wastewater pipe and continuously rinsed for a second preset time.

[0064] S320: For the first filter element located in the second position of the water inlet path, according to the corresponding flushing and cleaning mode, water is continuously supplied from the water source through the pre-treatment filter element to the first filter element for a third preset time, and the flushing water is discharged through the wastewater pipe.

[0065] Specifically, the pretreatment filter cartridge, as the first filter cartridge in the inlet water path, is typically an adsorption filter cartridge based on materials such as activated carbon. It is mainly used to intercept organic matter and remove residual chlorine. To protect the subsequent filtration filter cartridges, the pretreatment filter cartridge employs a heated regeneration cleaning mode. First, the valve on the pipeline after the outlet of the pretreatment filter cartridge is closed, and the valve on the wastewater pipeline of the pretreatment filter cartridge is opened to introduce water into the pretreatment filter cartridge. Then, the valve on the wastewater pipeline is closed. Next, the heating unit is activated to heat the water in the pretreatment filter cartridge for a first preset time. Heating breaks the bond energy of the activated carbon adsorption, causing residual chlorine and other substances to desorb from the pretreatment filter cartridge. Then, the valve on the wastewater pipeline is opened to continuously flush the pretreatment filter cartridge with water for a second preset time.

[0066] The first filter element, being the second filter element in the water inlet path, is a filtration filter element that primarily performs water purification. Therefore, it mainly adopts a flushing cleaning mode. Close the valve on the pipeline after the outlet of the first filter element, open the valve on its wastewater pipeline, and continuously flow water into the first filter element for flushing for a preset duration.

[0067] Example 2

[0068] An embodiment of the present invention provides a water purification control method, comprising the following steps:

[0069] S100: Obtain the pre-filtration and post-filtration purified water data at the target filter element of the water purification system, and determine the lifespan decay value of the target filter element based on the pre-filtration and post-filtration purified water data; the pre-filtration and post-filtration purified water data both include one or more of the following: total TOC value, COD value, and water flow rate value.

[0070] S110: Determine the removal rate of the target filter element based on the difference between the corresponding index parameters in the pre-filtration water purification data and the post-filtration water purification data.

[0071] S111: For the pretreatment filter cartridge located in the first position of the water inlet path, the pre-filtration purified water data and post-filtration purified water data are obtained by the first detection unit and the second detection unit respectively located at its water inlet and water outlet.

[0072] S112: For the first filter element located in the second position of the water inlet path, the purified water data before filtration is obtained by the second detection unit located at its water inlet end. Then, the water filtered by the first filter element is returned to the water inlet end of the first filter element through the return pipe connected to the water outlet end of the first filter element, and the purified water data after filtration is obtained by the second detection unit.

[0073] S120: Obtain the removal rate multiple times, and determine the lifespan decay value of the target filter element based on the results of the multiple removal rates obtained.

[0074] Specifically, for a given filter cartridge, its filtration capacity is also fixed. Therefore, the water quality of the area where the application is located is one of the determining factors for the data related to the filtered water. Thus, the pre-filtration and post-filtration water quality data of the target filter cartridge can reflect the water quality of the area where the application is located, and is therefore related to the lifespan of the target filter cartridge. So, the lifespan degradation value of the target filter cartridge is first determined by comparing the pre-filtration and post-filtration water quality data.

[0075] Furthermore, by comparing the purified water data before and after filtration, the differences in parameters such as TOC and COD can be calculated, which represents the removal rate N of the target filter element. By collecting the removal rate data of the target filter element multiple times, the filter element lifespan attenuation value A can be obtained. The principle is that by comparing the differences in multiple removal rates obtained separately, the change in filtration efficiency can be determined, which in turn determines the degree of attenuation of the target filter element's lifespan, i.e., the lifespan attenuation value.

[0076] The acquisition of pre-filtration and post-filtration purified water data differs slightly for the pre-treatment filter cartridge and the first filter cartridge. For the pre-treatment filter cartridge, during normal use of the water purification system, the corresponding purified water data can be obtained through the first and second detection units before and after filtration. For the first filter cartridge, purified water data is automatically acquired after a certain period of time (e.g., half an hour) after the user takes water normally. Specifically, the water outlet pipe after the first filter cartridge's outlet is closed (i.e., the water outlet pipe for normal water use), and the return pipe after the first filter cartridge's outlet is opened, allowing the water filtered by the first filter cartridge to flow back to the second detection unit, thereby acquiring its post-filtration purified water data. Its pre-filtration purified water data is the same as the post-filtration purified water data of the pre-treatment filter cartridge.

[0077] S200: Based on the relationship between the lifespan decay value and the preset decay value, the frequency of cleaning of the target filter element is adjusted by floating.

[0078] S210: When the lifespan decay value exceeds the preset decay upper limit, the cleaning frequency of the target filter element is adjusted upward based on the preset cleaning frequency to increase the cleaning frequency.

[0079] S220: When the lifespan decay value is less than the preset decay lower limit value, the cleaning frequency of the target filter element is adjusted downward based on the preset cleaning frequency to reduce the cleaning frequency.

[0080] Specifically, when the lifespan decay value A exceeds the preset upper limit, it indicates that the water quality in the application scenario is poor, and the filter element's lifespan decays excessively. Therefore, the cleaning frequency needs to be increased beyond the preset cleaning frequency, the cleaning cycle shortened, and the cleaning effect improved each time to fully extend the target filter element's lifespan. When the lifespan decay value A is less than the preset lower limit, it indicates that the water quality in the application scenario is good, and the filter element's lifespan decay is relatively small. Therefore, the cleaning frequency can be reduced beyond the preset cleaning frequency, and the cleaning cycle extended to address water resource issues. When the lifespan decay value A is between the preset upper and lower limits, it indicates that the water quality in the application scenario is moderate, and the filter element's lifespan decay is normal. Therefore, the cleaning frequency can be maintained at the preset cleaning frequency.

[0081] In addition, raw water quality data can be obtained at the very beginning of the water inlet pipe of the water purification system. The water quality can be directly judged by the raw water quality data. When the raw water quality is poor, the cleaning frequency of all filter elements can be automatically increased to prevent the filter elements from being easily clogged.

[0082] S300: Based on the adjusted cleaning frequency, the target filter element is cleaned according to the corresponding cleaning mode when the cleaning cycle is reached.

[0083] S310: For the pretreatment filter cartridge located in the first position of the water inlet path, according to the corresponding heating regeneration cleaning mode, the heating unit located in the pretreatment filter cartridge is activated to heat the water input from the water source into the pretreatment filter cartridge for a first preset time, and then the heated water is discharged through the wastewater pipe and continuously rinsed for a second preset time.

[0084] S320: For the first filter element located in the second position of the water inlet path, according to the corresponding flushing and cleaning mode, water is continuously supplied from the water source through the pre-treatment filter element to the first filter element for a third preset time, and the flushing water is discharged through the wastewater pipe.

[0085] Specifically, the pretreatment filter cartridge, as the first filter cartridge in the inlet water path, is typically an adsorption filter cartridge based on materials such as activated carbon. It is mainly used to intercept organic matter and remove residual chlorine. To protect the subsequent filtration filter cartridges, the pretreatment filter cartridge employs a heated regeneration cleaning mode. First, the valve on the pipeline after the outlet of the pretreatment filter cartridge is closed, and the valve on the wastewater pipeline of the pretreatment filter cartridge is opened to introduce water into the pretreatment filter cartridge. Then, the valve on the wastewater pipeline is closed. Next, the heating unit is activated to heat the water in the pretreatment filter cartridge for a first preset time. Heating breaks the bond energy of the activated carbon adsorption, causing residual chlorine and other substances to desorb from the pretreatment filter cartridge. Then, the valve on the wastewater pipeline is opened to continuously flush the pretreatment filter cartridge with water for a second preset time.

[0086] The first filter element, being the second filter element in the water inlet path, is a filtration filter element that primarily performs water purification. Therefore, it mainly adopts a flushing cleaning mode. Close the valve on the pipeline after the outlet of the first filter element, open the valve on its wastewater pipeline, and continuously flow water into the first filter element for flushing for a preset duration.

[0087] S400: Determine the removal rate of the pre-treatment filter cartridge based on the pre-filtration and post-filtration water purification data; when the removal rate is less than the set value, immediately start the heating regeneration cleaning of the pre-treatment filter cartridge, and make the heating unit run at maximum power and extend the continuous rinsing time.

[0088] Specifically, in certain emergency situations, emergency cleaning can be performed immediately by measuring the relationship between the removal rate of the pretreatment filter and the set value.

[0089] S500: Determines the water temperature in the pre-treatment filter cartridge based on the temperature data in the filtered water data of the pre-treatment filter cartridge; when the temperature value is lower than the lower limit, the heating unit set in the pre-treatment filter cartridge is activated to heat the water to the upper limit.

[0090] Specifically, under low temperature conditions, the production of high-precision filter membranes in filter cartridges will decrease. Therefore, the user experience of water purification systems is not good in low-temperature areas or in winter in most areas. Therefore, the heating unit is not only used for heating, cleaning and regenerating the pretreatment filter cartridges, but also for heating the water temperature to maintain a suitable water temperature for subsequent filter cartridges, thereby ensuring the production of high-precision filter membranes.

[0091] Example 3

[0092] An embodiment of the present invention provides a water purification control method, comprising the following steps:

[0093] S100: Obtain the pre-filtration and post-filtration purified water data at the target filter element of the water purification system, and determine the lifespan decay value of the target filter element based on the pre-filtration and post-filtration purified water data; the pre-filtration and post-filtration purified water data both include one or more of the following: total TOC value, COD value, and water flow rate value.

[0094] S110: Determine the removal rate of the target filter element based on the difference between the corresponding index parameters in the pre-filtration water purification data and the post-filtration water purification data.

[0095] S111: For the pretreatment filter cartridge located in the first position of the water inlet path, the pre-filtration purified water data and post-filtration purified water data are obtained by the first detection unit and the second detection unit respectively located at its water inlet and water outlet.

[0096] S112: For the first filter element located in the second position of the water inlet path, the purified water data before filtration is obtained by the second detection unit located at its water inlet end. Then, the water filtered by the first filter element is returned to the water inlet end of the first filter element through the return pipe connected to the water outlet end of the first filter element, and the purified water data after filtration is obtained by the second detection unit.

[0097] S120: Obtain the removal rate multiple times, and determine the lifespan decay value of the target filter element based on the results of the multiple removal rates obtained.

[0098] Specifically, for a given filter cartridge, its filtration capacity is also fixed. Therefore, the water quality of the area where the application is located is one of the determining factors for the data related to the filtered water. Thus, the pre-filtration and post-filtration water quality data of the target filter cartridge can reflect the water quality of the area where the application is located, and is therefore related to the lifespan of the target filter cartridge. So, the lifespan degradation value of the target filter cartridge is first determined by comparing the pre-filtration and post-filtration water quality data.

[0099] Furthermore, by comparing the purified water data before and after filtration, the differences in parameters such as TOC and COD can be calculated, which represents the removal rate N of the target filter element. By collecting the removal rate data of the target filter element multiple times, the filter element lifespan attenuation value A can be obtained. The principle is that by comparing the differences in multiple removal rates obtained separately, the change in filtration efficiency can be determined, which in turn determines the degree of attenuation of the target filter element's lifespan, i.e., the lifespan attenuation value.

[0100] The acquisition of pre-filtration and post-filtration purified water data differs slightly for the pre-treatment filter cartridge and the first filter cartridge. For the pre-treatment filter cartridge, during normal use of the water purification system, the corresponding purified water data can be obtained through the first and second detection units before and after filtration. For the first filter cartridge, purified water data is automatically acquired after a certain period of time (e.g., half an hour) after the user takes water normally. Specifically, the water outlet pipe after the first filter cartridge's outlet is closed (i.e., the water outlet pipe for normal water use), and the return pipe after the first filter cartridge's outlet is opened, allowing the water filtered by the first filter cartridge to flow back to the second detection unit, thereby acquiring its post-filtration purified water data. Its pre-filtration purified water data is the same as the post-filtration purified water data of the pre-treatment filter cartridge.

[0101] S200: Based on the relationship between the lifespan decay value and the preset decay value, the frequency of cleaning of the target filter element is adjusted by floating.

[0102] S210: When the lifespan decay value exceeds the preset decay upper limit, the cleaning frequency of the target filter element is adjusted upward based on the preset cleaning frequency to increase the cleaning frequency.

[0103] S220: When the lifespan decay value is less than the preset decay lower limit value, the cleaning frequency of the target filter element is adjusted downward based on the preset cleaning frequency to reduce the cleaning frequency.

[0104] Specifically, when the lifespan decay value A exceeds the preset upper limit, it indicates that the water quality in the application scenario is poor, and the filter element's lifespan decays excessively. Therefore, the cleaning frequency needs to be increased beyond the preset cleaning frequency, the cleaning cycle shortened, and the cleaning effect improved each time to fully extend the target filter element's lifespan. When the lifespan decay value A is less than the preset lower limit, it indicates that the water quality in the application scenario is good, and the filter element's lifespan decay is relatively small. Therefore, the cleaning frequency can be reduced beyond the preset cleaning frequency, and the cleaning cycle extended to address water resource issues. When the lifespan decay value A is between the preset upper and lower limits, it indicates that the water quality in the application scenario is moderate, and the filter element's lifespan decay is normal. Therefore, the cleaning frequency can be maintained at the preset cleaning frequency.

[0105] In addition, raw water quality data can be obtained at the very beginning of the water inlet pipe of the water purification system. The water quality can be directly judged by the raw water quality data. When the raw water quality is poor, the cleaning frequency of all filter elements can be automatically increased to prevent the filter elements from being easily clogged.

[0106] S300: Based on the adjusted cleaning frequency, the target filter element is cleaned according to the corresponding cleaning mode when the cleaning cycle is reached.

[0107] S310: For the pretreatment filter cartridge located in the first position of the water inlet path, according to the corresponding heating regeneration cleaning mode, the heating unit located in the pretreatment filter cartridge is activated to heat the water input from the water source into the pretreatment filter cartridge for a first preset time, and then the heated water is discharged through the wastewater pipe and continuously rinsed for a second preset time.

[0108] S320: For the first filter element located in the second position of the water inlet path, according to the corresponding flushing and cleaning mode, water is continuously supplied from the water source through the pre-treatment filter element to the first filter element for a third preset time, and the flushing water is discharged through the wastewater pipe.

[0109] Specifically, the pretreatment filter cartridge, as the first filter cartridge in the inlet water path, is typically an adsorption filter cartridge based on materials such as activated carbon. It is mainly used to intercept organic matter and remove residual chlorine. To protect the subsequent filtration filter cartridges, the pretreatment filter cartridge employs a heated regeneration cleaning mode. First, the valve on the pipeline after the outlet of the pretreatment filter cartridge is closed, and the valve on the wastewater pipeline of the pretreatment filter cartridge is opened to introduce water into the pretreatment filter cartridge. Then, the valve on the wastewater pipeline is closed. Next, the heating unit is activated to heat the water in the pretreatment filter cartridge for a first preset time. Heating breaks the bond energy of the activated carbon adsorption, causing residual chlorine and other substances to desorb from the pretreatment filter cartridge. Then, the valve on the wastewater pipeline is opened to continuously flush the pretreatment filter cartridge with water for a second preset time.

[0110] The first filter element, being the second filter element in the water inlet path, is a filtration filter element that primarily performs water purification. Therefore, it mainly adopts a flushing cleaning mode. Close the valve on the pipeline after the outlet of the first filter element, open the valve on its wastewater pipeline, and continuously flow water into the first filter element for flushing for a preset duration.

[0111] S400: Determine the removal rate of the pre-treatment filter cartridge based on the pre-filtration and post-filtration water purification data; when the removal rate is less than the set value, immediately start the heating regeneration cleaning of the pre-treatment filter cartridge, and make the heating unit run at maximum power and extend the continuous rinsing time.

[0112] Specifically, in certain emergency situations, emergency cleaning can be performed immediately by measuring the relationship between the removal rate of the pretreatment filter and the set value.

[0113] S500: Determines the water temperature in the pre-treatment filter cartridge based on the temperature data in the filtered water data of the pre-treatment filter cartridge; when the temperature value is lower than the lower limit, the heating unit set in the pre-treatment filter cartridge is activated to heat the water to the upper limit.

[0114] Specifically, under low temperature conditions, the production of high-precision filter membranes in filter cartridges will decrease. Therefore, the user experience of water purification systems is not good in low-temperature areas or in winter in most areas. Therefore, the heating unit is not only used for heating, cleaning and regenerating the pretreatment filter cartridges, but also for heating the water temperature to maintain a suitable water temperature for subsequent filter cartridges, thereby ensuring the production of high-precision filter membranes.

[0115] S600: Determine the water flow rate of the first filter element based on the water flow rate data in the pre-filtration and post-filtration purified water data of the first filter element; when the water flow rate is less than the preset flow rate, determine that the lifespan of the first filter element has expired and output a replacement prompt signal.

[0116] S700: Based on the pre-filtration purified water data and post-filtration purified water data of the pre-treatment filter cartridge, determine the removal rate of the pre-treatment filter cartridge; when the removal rate falls within the set range and the removal rate is still within the set range after heating regeneration cleaning, determine that the pre-treatment filter cartridge has reached the end of its life and output a replacement prompt signal.

[0117] Specifically, although the control method of this invention allows for flexible adjustment of the cleaning frequency of the filter element, the filter element will eventually reach its service life, at which point the user needs to be reminded to replace it. Regarding the method for determining when a filter element has reached its service life, since the first filter element is a filtration filter, the water flow rate can be directly determined by comparing the water flow rate data before and after filtration. Because filtration filters are often severely clogged when they reach their service life, the water flow rate will be lower than normal. The pretreatment filter element, on the other hand, is an adsorption filter. This is generally determined by the relationship between the removal rate and a set range. If the removal rate consistently falls within the set range after multiple cleaning cycles, it indicates that the filter element has reached the end of its service life.

[0118] Example 4

[0119] An embodiment of the present invention provides a water purification control device, comprising:

[0120] The data acquisition and processing module is used to acquire the pre-filtration and post-filtration purified water data at the target filter element of the water purification system, and determine the lifespan decay value of the target filter element based on the pre-filtration and post-filtration purified water data.

[0121] The cleaning frequency adjustment module is used to adjust the cleaning frequency of the target filter element based on the relationship between the lifespan decay value and the preset decay value; and

[0122] The cleaning control module is used to clean the target filter element according to the corresponding cleaning mode when the cleaning cycle is reached, based on the adjusted cleaning frequency.

[0123] Example 5

[0124] An embodiment of the present invention provides a water purification system, which applies the water purification control method of any of the above embodiments. It includes a pretreatment filter element 1 and a first filter element 2 connected sequentially by a pipeline in the water inlet direction. A first detection unit 3 is provided on the pipeline before the water inlet end of the pretreatment filter element 1, and a second detection unit 4 is provided on the pipeline between the water outlet end of the pretreatment filter element 1 and the water inlet end of the first filter element 2. The water outlet end of the first filter element 2 is connected to a return pipeline 5, and the end of the return pipeline 5 is connected to the pipeline between the water outlet end of the pretreatment filter element 1 and the second detection unit 4.

[0125] The pretreatment filter element 1 is also connected to a pretreatment wastewater pipeline 11, and a heating unit 12 is installed inside it; the first filter element 2 is also connected to a first wastewater pipeline 2, and a second filter element 7 as a post-filter element is installed after the first filter element 2. A pressure stabilizing pump 6 is also installed between the pretreatment filter element 1 and the first filter element 2.

[0126] Furthermore, both the first detection unit 3 and the second detection unit 4 include one or more of the following: a TDS detection probe, a turbidity detection probe, a pH probe, a TOC tester, a COD tester, a temperature probe, a flow meter, and a pressure detection device.

[0127] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to 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.

[0128] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A water purification control method, characterized in that, Includes the following steps: Obtain the pre-filtration and post-filtration purified water data at the target filter element of the water purification system, and determine the lifespan attenuation value of the target filter element based on the pre-filtration and post-filtration purified water data. Based on the relationship between the lifespan decay value and the preset decay value, the frequency of cleaning the target filter element is adjusted by floating. When the cleaning cycle corresponding to the cleaning frequency is reached, the target filter element is cleaned according to the corresponding cleaning mode; For the pretreatment filter cartridge set in the first position of the water inlet path, according to the corresponding heating regeneration cleaning mode, the heating unit set in the pretreatment filter cartridge is activated to heat the water input from the water source into the pretreatment filter cartridge for a first preset time, and then the heated water is discharged through the wastewater pipe and continuously rinsed for a second preset time. For the first filter element set in the second position of the water inlet path, according to the corresponding flushing and cleaning mode, water source continuously flushes the first filter element through the pre-treatment filter element for a third preset time, and the flushing water is discharged through the wastewater pipe. The removal rate of the pretreatment filter cartridge is determined based on the pre-filtration purified water data and the post-filtration purified water data of the pretreatment filter cartridge. When the removal rate is less than the set value, the heating regeneration cleaning of the pre-treated filter element is immediately started, and the heating unit is operated at maximum power and the continuous rinsing time is extended. For the pretreatment filter cartridge located in the first position of the water inlet path, the pre-filtration purified water data and the post-filtration purified water data are obtained by the first detection unit and the second detection unit respectively located at its water inlet end and water outlet end. For the first filter element located in the second position of the water inlet path, the pre-filtration purified water data is obtained by the second detection unit located at its water inlet end. Then, the water filtered by the first filter element is returned to the water inlet end of the first filter element through a return pipeline connected to the water outlet end of the first filter element, and the post-filtration purified water data is obtained by the second detection unit.

2. The water purification control method according to claim 1, characterized in that, Determining the lifespan degradation value of the target filter element based on the pre-filtration purified water data and the post-filtration purified water data includes: The removal rate of the target filter element is determined based on the difference between the corresponding index parameters in the pre-filtration purified water data and the post-filtration purified water data. The removal rate is obtained multiple times, and the lifespan attenuation value of the target filter element is determined based on the results of the multiple removal rates obtained.

3. The water purification control method according to claim 1, characterized in that, Based on the relationship between the lifespan decay value and the preset value, the target filter element is adjusted by floating based on the preset cleaning frequency, including: When the lifespan decay value exceeds the preset decay upper limit value, the cleaning frequency of the target filter element is adjusted upward based on the preset cleaning frequency to increase the cleaning frequency. When the lifespan decay value is less than the preset decay lower limit value, the cleaning frequency of the target filter element is adjusted downward based on the preset cleaning frequency to reduce the cleaning frequency.

4. The water purification control method according to claim 1, characterized in that, Both the pre-filtration water purification data and the post-filtration water purification data include one or more of the following: total TOC value, COD value, and water flow rate value.

5. The water purification control method according to claim 1, characterized in that, Also includes: The water flow rate value of the first filter element is determined based on the water flow rate data in the pre-filtration purified water data and the post-filtration purified water data of the first filter element. When the water flow rate is less than the preset flow rate, the lifespan of the first filter element is determined to be expired, and a replacement prompt signal is output.

6. The water purification control method according to claim 1, characterized in that, Also includes: The removal rate of the pretreatment filter cartridge is determined based on the pre-filtration purified water data and the post-filtration purified water data of the pretreatment filter cartridge. If the removal rate falls within the set range and the removal rate is still within the set range after heating and regeneration cleaning, the pretreatment filter cartridge is determined to have reached the end of its lifespan, and a replacement prompt signal is output.

7. The water purification control method according to claim 1, characterized in that, Also includes: The temperature value of the water in the pretreatment filter cartridge is determined based on the temperature data in the filtered purified water data of the pretreatment filter cartridge. When the temperature value is lower than the lower limit, the heating unit installed in the pretreatment filter element is activated to heat the water to the upper limit.

8. A water purification control device based on the water purification control method according to any one of claims 1-7, characterized in that, include: The data acquisition and processing module is used to acquire the pre-filtration purified water data and post-filtration purified water data at the target filter element of the water purification system, and determine the lifespan attenuation value of the target filter element based on the pre-filtration purified water data and the post-filtration purified water data. The cleaning frequency adjustment module is used to make floating adjustments based on the preset cleaning frequency of the target filter element according to the relationship between the life decay value and the preset decay value. as well as The cleaning control module is used to clean the target filter element according to the corresponding cleaning mode when the cleaning cycle is reached, based on the adjusted cleaning frequency.

9. A water purification system, employing the water purification control method as described in any one of claims 1 to 7, characterized in that, It includes a pretreatment filter cartridge and a first filter cartridge that are connected in sequence by a pipeline in the water inlet direction. A first detection unit is provided on the pipeline before the water inlet end of the pretreatment filter cartridge, and a second detection unit is provided on the pipeline between the water outlet end of the pretreatment filter cartridge and the water inlet end of the first filter cartridge. The outlet of the first filter element is connected to a return pipe, and the end of the return pipe is connected to the pipe between the outlet of the pretreatment filter element and the second detection unit.

10. The water purification system according to claim 9, characterized in that, Both the first detection unit and the second detection unit include one or more of the following: a TDS detection probe, a turbidity detection probe, a pH probe, a TOC analyzer, a COD analyzer, a temperature probe, a flow meter, and a pressure detection device.

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