Waterway system, flushing method and water purifier

Abstract

The application discloses a waterway system, a flushing method and a water purifier. The waterway system comprises a water inlet waterway and a backflow waterway. The backflow waterway is connected to the water inlet waterway. The backflow waterway comprises a flushing waterway and a drainage waterway. The water inlet waterway comprises a water outlet. A filter assembly is arranged on the water inlet waterway. The water inlet end of the flushing waterway is connected to one end of the water inlet waterway close to the water outlet. The water inlet end of the drainage waterway is connected to the wastewater output end of the filter assembly. A negative pressure valve, a direct current pump assembly, an evaporation capillary, a PH sensor and a first one-way valve are arranged on the flushing waterway. A sensor assembly is arranged on the drainage waterway. According to the application, the acid washing strategy of the water purifier without a built-in water tank can be realized based on the filtered pure water. The scale blockage caused by minerals and microorganisms in water can be flushed, the descaling effect and rationality are improved, water resources are saved, and the application can be sustainable.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, and in particular to a water system, flushing method, and water purifier. Background Technology

[0002] Water purifiers are now widely used in homes and offices. Tap water contains minerals such as calcium and magnesium ions, which cause water hardness. High hardness can clog the inlet valve, filter cartridge, and wastewater valve of a water purifier. Additionally, microbial contamination can cause the same problem, affecting the filtration effect and resulting in water that does not meet user requirements. It also shortens the lifespan of the filter cartridge, leading to a poor user experience. Summary of the Invention

[0003] To address the aforementioned problems in the prior art, this invention discloses a water system, a flushing method, and a water purifier. This system enables acid flushing of a tankless water purifier using filtered pure water, flushing away scale and blockages caused by minerals and microorganisms in the water, improving descaling efficiency and effectiveness, while conserving water resources and ensuring sustainable use. The technical solution disclosed in this invention is as follows:

[0004] According to one aspect of the embodiments disclosed in this invention, a water system is provided, including an inlet water path and a return water path, wherein the return water path is connected to the inlet water path, the return water path includes a flushing water path and a drain water path, the inlet water path includes an outlet, a filter assembly is provided on the inlet water path, the inlet end of the flushing water path is connected to the end of the inlet water path near the outlet, and the inlet end of the drain water path is connected to the wastewater output end of the filter assembly;

[0005] The flushing water line is equipped with a negative pressure valve, a DC pump assembly, an evaporation capillary tube, a pH sensor, and a first one-way valve, while the drainage water line is equipped with a sensor assembly.

[0006] Optionally, the DC pump assembly includes a first DC pump, and the negative pressure valve, the first DC pump, the evaporation capillary, the pH sensor, and the first one-way valve are sequentially arranged on the flushing water path.

[0007] Optionally, a storage tank is provided in the rinsing water line, the pH sensor is installed in the storage tank, the DC pump assembly includes a first DC pump and a second DC pump, and the negative pressure valve, the first DC pump, the evaporation capillary, the storage tank, the second DC pump and the first one-way valve are sequentially arranged in the rinsing water line; a water level sensor is also provided in the storage tank.

[0008] Optionally, the filtration assembly includes a first filter and a second filter, and a booster pump is also provided in the water inlet path. The booster pump is located between the first filter and the second filter, and the water inlet of the drainage path is connected to the wastewater outlet of the second filter.

[0009] The outlet of the flushing water path is connected to the inlet of the first filter, or the outlet of the flushing water path is connected to the inlet of the second filter, or the outlet of the flushing water path is connected between the second filter and the sensor assembly.

[0010] Optionally, a drain valve and a second check valve are provided on the drainage waterway, and the sensor assembly, the drain valve and the second check valve are sequentially arranged on the drainage waterway;

[0011] The sensor assembly includes at least one sensor for detecting water quality.

[0012] According to another aspect of the disclosed embodiments of the present invention, a flushing method based on a water system as described above is provided, the water system including a return water path, the return water path including a drainage water path, and a sensor assembly disposed on the drainage water path, the method comprising:

[0013] The sensor component detects current sensing data, first sensing data, and second sensing data; the current sensing data is the sensing data corresponding to the first current time, the first sensing data is the sensing data corresponding to the first time, the second sensing data is the sensing data corresponding to the second time, the first time is the time before the first current time, and the second time is the time before the first time.

[0014] Based on the current sensing data and the preset sensing data, determine the current sensing deviation data corresponding to the first current moment;

[0015] Based on the first sensing data and the preset sensing data, the first sensing deviation data corresponding to the first moment is determined;

[0016] Based on the second sensing data and the preset sensing data, the second sensing deviation data corresponding to the second time moment is determined;

[0017] Based on the current sensing deviation data, the first sensing deviation data, the second sensing deviation data, and the first preset adjustment coefficient, the flushing flow rate adjustment data is determined;

[0018] The flushing flow rate is adjusted based on the flushing flow rate adjustment data until the current sensing deviation data is less than a first preset threshold.

[0019] Optionally, the return water path includes a flushing water path, a storage tank is installed on the flushing water path, and a pH sensor is installed in the storage tank. Before acquiring the current sensor data at the first current moment, the first sensor data at the first moment, and the second sensor data at the second moment, the method further includes:

[0020] The current pH data, first pH data, and second pH data of the liquid in the storage tank are acquired. The pH data of the liquid in the storage tank are obtained based on the detection of the pH sensor. The current pH data is the pH data corresponding to the second current time. The first pH data is the pH data corresponding to the third time. The second pH data is the pH data corresponding to the fourth time. The third time is the time before the second current time. The fourth time is the time before the third time.

[0021] Based on the current pH data and the preset pH data, determine the current pH deviation data at the second current moment;

[0022] Based on the first pH data and the preset pH data, the first pH deviation data at the third time point is determined;

[0023] Based on the second pH data and the preset pH data, the second pH deviation data at the fourth time point is determined;

[0024] Based on the current pH deviation data, the first pH deviation data, the second pH deviation data, and the second preset adjustment coefficient, the influent flow rate adjustment data is determined;

[0025] The inlet flow rate of the storage tank is adjusted based on the inlet flow rate adjustment data until the current pH deviation data is less than the second preset threshold.

[0026] Optionally, the method further includes:

[0027] Based on the current sensor data, the preset sensor data, and the third preset adjustment coefficient, the target flushing water usage is determined.

[0028] Rinse at a preset rinsing flow rate until the cumulative water usage reaches the target rinsing water usage.

[0029] Optionally, the first preset adjustment coefficient includes a first proportional adjustment coefficient, a first integral adjustment coefficient, and a first derivative adjustment coefficient, and the first preset adjustment coefficient is determined according to the following steps:

[0030] Acquire historical sensor data and corresponding historical flushing flow data;

[0031] Based on the preset sensing data, first historical sensing data and second historical sensing data are determined, wherein the preset sensing data is located between the first historical sensing data and the second historical sensing data.

[0032] Based on the first historical sensing data and the second historical sensing data, historical sensing deviation data is determined;

[0033] Based on the first historical flushing flow rate data corresponding to the first historical sensor data and the second historical flushing flow rate data corresponding to the second historical sensor data, the historical flushing flow rate deviation data is determined.

[0034] Based on the historical sensor deviation data and the historical flushing flow rate deviation data, the first proportional adjustment coefficient is determined;

[0035] Based on the first proportional adjustment coefficient, the first integral adjustment coefficient and the first derivative adjustment coefficient are determined.

[0036] According to another aspect of the disclosed embodiments of the present invention, a water purifier is provided, including the water circuit system as described above.

[0037] The technical solutions provided by the embodiments disclosed in this invention bring at least the following beneficial effects:

[0038] The water system provided by this invention includes an inlet water path and a return water path. The return water path is connected to the inlet water path and includes a flushing water path and a drain water path. The inlet water path includes an outlet and a filter assembly is installed on it. The inlet end of the flushing water path is connected to the end of the inlet water path near the outlet. The inlet end of the drain water path is connected to the wastewater output end of the filter assembly. The flushing water path is equipped with a negative pressure valve, a DC pump assembly, an evaporation capillary tube, a pH sensor, and a first one-way valve. The drain water path is equipped with a sensor assembly. This allows the evaporation capillary tube to enhance the acidity of the filtered, weakly acidic pure water, enabling an acid washing strategy for water purifiers without a built-in water tank. This flushes away scale and blockages caused by minerals and microorganisms in the water, improving the descaling effect and rationality, while saving water resources and ensuring sustainable application.

[0039] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0040] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the disclosure of this invention and, together with the description, serve to explain the principles of this disclosure, and do not constitute an undue limitation of the disclosure of this invention.

[0041] Figure 1 This is a schematic diagram of the structure of a water system provided in an embodiment of this application;

[0042] Figure 2 This is a schematic diagram of another water system provided in an embodiment of this application;

[0043] Figure 3 This is a schematic diagram of another water system provided in an embodiment of this application;

[0044] Figure 4 This is a schematic diagram of another water system provided in an embodiment of this application;

[0045] Figure 5 This is a schematic flowchart of a rinsing method provided in an embodiment of this application;

[0046] In the figure, the corresponding labels are as follows: 1-Inlet water path; 11-First filter; 12-Second filter; 13-Inlet valve; 14-Booster pump; 2-Flushing water path; 21-First DC pump; 22-Second DC pump; 23-Evaporation capillary; 24-pH sensor; 25-Negative pressure valve; 26-First check valve; 27-Storage tank; 28-Water level sensor; 3-Drainage water path; 31-Sensor assembly; 32-Drain valve; 33-Second check valve. Detailed Implementation

[0047] To enable those skilled in the art to better understand the technical solutions disclosed in this invention, the technical solutions in the disclosed embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0048] It should be noted that the terms "first" and "second" in the specification, claims, and accompanying drawings of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Additionally, in the description of this embodiment, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, or product comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0049] To make the objectives, technical solutions, and advantages disclosed in the embodiments of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of this application and are not intended to limit the embodiments of this application.

[0050] This invention provides an acid washing water circuit system for a water purifier. Please refer to [link / reference]. Figures 1-4 The water system includes an inlet water path 1 and a return water path. The return water path is connected to the inlet water path 1. The return water path includes a flushing water path 2 and a drain water path 3. The inlet water path 1 includes an outlet and is equipped with a filter assembly. The inlet end of the flushing water path 2 is connected to the end of the inlet water path 1 near the outlet. The inlet end of the drain water path 3 is connected to the wastewater output end of the filter assembly. The flushing water path 2 is equipped with a negative pressure valve 25, a DC pump assembly, an evaporation capillary tube 23, a pH sensor 24, and a first one-way valve 26. The drain water path 3 is equipped with a sensor assembly 31.

[0051] Optionally, the filtration assembly includes a first filter 11 and a second filter 12. A booster pump 14 is also provided on the inlet water path 1, located between the first filter 11 and the second filter 12. The inlet end of the drain water path 3 is connected to the wastewater outlet end of the second filter 12. The outlet end of the flushing water path 2 is connected to the inlet end of the first filter 11, or the outlet end of the flushing water path 2 is connected to the inlet end of the second filter 12, or the outlet end of the flushing water path 2 is connected between the second filter 12 and the sensor assembly 31.

[0052] In one specific embodiment, the outlet can be used to output water filtered by the filter assembly, and the outlet is connected to the water intake pipe to supply water to the user. The first filter 11 can be a pre-filter, and the second filter 12 can be a post-filter, specifically a reverse osmosis filter (RO filter). An inlet valve 13 can also be provided on the inlet water circuit 1. The inlet valve 13 can be located before or after the pre-filter. When the inlet valve 13 and the booster pump 14 are opened, the water purifier performs water purification operation.

[0053] In practical applications, tap water enters the water purifier through the inlet of water inlet channel 1. After being filtered by the pre-filter and reverse osmosis filter, the resulting water is usually weakly acidic (pH around 6). This is because the pre-filter and reverse osmosis filter cannot remove dissolved gases. Therefore, the carbon dioxide (CO2) content in the filtered water is basically the same as that in the incoming water, but the bicarbonate content is higher. and carbonate It will decrease by about 1-2 orders of magnitude, thereby disrupting the CO2 dissolution equilibrium.

[0054] Based on this characteristic, a branch (i.e., flushing water path 2) can be added near the outlet of the inlet water path 1. Water filtered by the pre-filter and reverse osmosis filter is introduced into the flushing water path 2 through the negative pressure valve 25 and a DC pump. After being processed by the evaporation capillary 23, the acidity of the weakly acidic liquid entering the evaporation capillary 23 is enhanced. This allows the stronger acidic liquid to flush the internal water system of the water purifier through the flushing water path 2, and the flushed liquid is discharged from the drain water path 3. Thus, based on the flushing water path 2 and the device set on it, the filtration characteristics of the water purifier itself can be used to flush away scale and blockages caused by minerals and microorganisms in the water. The flushing logic is simple and effective, improving the descaling effect and practicality, while saving water resources and allowing for repeated and sustainable use, thus saving costs. At the same time, the pH sensor 24 can be used to measure the pH value of the acidic liquid after being processed by the evaporation capillary 23 in real time. When the acidity of the acidic liquid reaches a certain level, the internal water system of the water purifier can be flushed to improve the descaling effect.

[0055] Optionally, a drain valve 32 and a second check valve 33 are provided on the drain water path 3, and the sensor assembly 31, the drain valve 32 and the second check valve 33 are sequentially arranged on the drain water path 3; the sensor assembly 31 includes at least one sensor for detecting water quality.

[0056] Specifically, the drain valve 32 can be an electromagnetic valve, and the sensors used to detect water quality can include hardness sensors, organic matter sensors, total dissolved solids (TDS) sensors, etc.

[0057] In a specific embodiment, such as Figures 1-3 As shown, the outlet of the rinsing water path 2 can be connected in various ways, allowing for rinsing of different locations within the water path. For example, when the outlet of the rinsing water path 2 is connected to the inlet of the first filter 11, the pickling solution, after being processed by the evaporation capillary 23, enters the inlet water path 1 from the outlet of the rinsing water path 2. This rinses the pre-filter, inlet valve 13, and reverse osmosis filter. The rinsed solution then enters the drain water path 3 through the wastewater outlet of the reverse osmosis filter, passes through the sensor assembly 31, and rinses the drain valve 32 before being discharged from the drain outlet. Similarly, when the outlet of the rinsing water path 2 is connected to the inlet of the second filter 12, the pickling solution, after being processed by the evaporation capillary 23, enters the inlet water path 1 from the outlet of the rinsing water path 2. This rinses the reverse osmosis filter. The rinsed solution then enters the drain water path 3 through the wastewater outlet of the reverse osmosis filter, passes through the sensor assembly 31, and rinses the drain valve 32 before being discharged from the drain outlet. With the outlet of the flushing water path 2 connected between the second filter 12 and the sensor assembly 31, the acid washing solution, after being processed by the evaporation capillary 23, enters the drain water path 3 from the outlet of the flushing water path 2. It then passes through the sensor assembly 31, flushes the drain valve 32, and is discharged from the drain outlet. Furthermore, multiple flushing water paths 2 can be combined based on the internal water system structure of the water purifier to improve the thoroughness of the flushing and enhance the overall descaling effect.

[0058] Optional, such as Figures 1-3 As shown, the rinsing water path 2 does not have a storage tank 27 for storing pickling solution. The DC pump assembly includes a first DC pump 21, a negative pressure valve 25, a first DC pump 21, an evaporation capillary tube 23, a pH sensor 24, and a first one-way valve 26, which are sequentially arranged on the rinsing water path 2.

[0059] Specifically, the first DC pump 21 can be used to adjust the rinsing water volume. During the rinsing process, the DC pump can be adjusted by combining the acidity of the pickling solution detected by the pH sensor 24 and the water quality data detected by the sensor component 31, so as to dynamically adjust the rinsing flow rate and rinsing time.

[0060] Optionally, a storage tank 27 is provided on the flushing water path 2, a pH sensor 24 is installed in the storage tank 27, and the DC pump assembly includes a first DC pump 21 and a second DC pump 22. A negative pressure valve 25, the first DC pump 21, an evaporation capillary tube 23, a storage tank 27, a second DC pump 22 and a first one-way valve 26 are sequentially arranged on the flushing water path 2; a water level sensor 28 is also provided in the storage tank 27.

[0061] Specifically, the storage tank 27 can be used to store the pickling solution obtained after being processed by the evaporation capillary 23, the pH sensor 24 can be used to measure the pH value of the pickling solution in the storage tank 27, the first DC pump 21 can be used to adjust the amount of water entering the storage tank 27, and the second DC pump 22 can be used to adjust the amount of rinsing water.

[0062] In practical applications, the negative pressure valve 25, the first DC pump 21, and the second DC pump 22 are opened. Water filtered by the filter assembly enters the rinsing water path 2, passes through the evaporation capillary 23 to obtain pickling solution, and enters the storage tank 27. Water is then drawn from the storage tank 27 to rinse the internal water path of the water purifier, and the rinsed liquid is discharged from the drain path 3. During this process, the acidity of the pickling solution detected by the pH sensor 24 in the storage tank 27 can be acquired in real time. The first DC pump 21 is adjusted according to the acidity of the pickling solution to regulate the amount of water entering the rinsing water path 2, causing the acidity of the pickling solution to change. When the acidity of the pickling solution reaches the expected acidity, the first DC pump 21 and the amount of water entering the rinsing water path 2 no longer need to be adjusted. Additionally, the second DC pump 22 can be adjusted based on the water quality data detected by the sensor assembly 31 to regulate the rinsing water volume, gradually reducing the difference between the water quality data and the expected data until the difference is less than a preset threshold, or the water quality data reaches the expected data, at which point rinsing can be stopped.

[0063] Specifically, the above process can be carried out simultaneously, or it can be done before rinsing begins. First, the negative pressure valve 25 and the first DC pump 21 are opened, while the second DC pump 22 is closed. The amount of water entering the storage tank 27 is adjusted according to the detection data of the pH sensor 24, and the acid pickling solution with suitable acidity is stored in the storage tank 27. Then, the negative pressure valve 25 and the first DC pump 21 are closed, and the water intake of the rinsing water path 2 is stopped. After that, the second DC pump 22 is opened to draw water from the storage tank 27 to rinse the water path. During the rinsing process, the rinsing water volume is adjusted according to the water quality data detected by the sensor component 31. Based on the detection data of the water level sensor 28 in the storage tank 27, if the water quality data does not meet the expectations and the water level is lower than the preset water level threshold, the negative pressure valve 25 and the first DC pump 21 are opened to allow water to enter the rinsing water path 2 and continue to input the acid pickling solution treated by the evaporation capillary 23 into the storage tank 27. Then, if the water quality data meets the expectations, the second DC pump 22 is closed, and the rinsing ends.

[0064] Specifically, the outlet of the flushing water path 2 with the storage tank 27 can have multiple connection methods. Different connection methods can flush different water path positions. For specific connection methods, please refer to the connection methods of the outlet of the flushing water path 2 without the storage tank 27 mentioned above. They will not be repeated here.

[0065] As can be seen from the technical solutions provided in the embodiments of this specification above, the flushing water circuit 2 system in this specification includes an inlet water circuit 1 and a return water circuit. The return water circuit is connected to the inlet water circuit 1 and includes a flushing water circuit 2 and a drain water circuit 3. The inlet water circuit 1 includes an outlet and is equipped with a filter assembly. The inlet end of the flushing water circuit 2 is connected to the end of the inlet water circuit 1 near the outlet. The inlet end of the drain water circuit 3 is connected to the wastewater output end of the filter assembly. The flushing water circuit 2 is equipped with a negative pressure valve 25, a DC pump assembly, and an evaporation brush. The system includes a capillary tube 23, a pH sensor 24, and a first one-way valve 26. A sensor assembly 31 is installed on the drainage water path 3. Based on the flushing water path 2 and the device on it, the system utilizes the filtration characteristics of the water purifier itself. Through the evaporation capillary tube 23, the filtered, weakly acidic pure water is acidified, thereby flushing away scale and blockages caused by minerals and microorganisms in the water. The flushing logic is simple and effective, improving the descaling effect and rationality. At the same time, it saves water resources, can be reused sustainably, saves costs, and improves practicality.

[0066] The following describes a flushing method for the flushing water path 2 system based on the above embodiments of this application, such as... Figure 5 As shown, the above method may include:

[0067] S501: Acquire the current sensing data, first sensing data and second sensing data detected by the sensor components.

[0068] In one specific embodiment, the current sensing data can be the sensing data corresponding to the first current moment, the first sensing data can be the sensing data corresponding to the first moment, and the second sensing data can be the sensing data corresponding to the second moment. Specifically, the first current moment can be the flushing start moment, the first moment can be the moment before the first current moment, and the second moment can be the moment before the first moment.

[0069] In one specific embodiment, the sensor assembly 31 may include at least one sensor for detecting water quality, such as a hardness sensor, an organic matter sensor, a total dissolved solids (TDS) sensor, etc. Accordingly, the aforementioned sensing data may be hardness data, organic matter data, TDS data, etc.

[0070] S503: Based on the current sensing data and preset sensing data, determine the current sensing deviation data corresponding to the first current moment.

[0071] In one specific embodiment, the preset sensing data can be preset target sensing data, that is, the expected value of the sensing data detected by the sensor after rinsing, which can be set according to actual application requirements. Specifically, the difference between the current sensing data and the preset sensing data can be determined as the aforementioned current sensing deviation data.

[0072] S505: Based on the first sensing data and preset sensing data, determine the first sensing deviation data corresponding to the first moment.

[0073] In one specific embodiment, the difference between the first sensing data and the preset sensing data can be determined as the aforementioned first sensing deviation data.

[0074] S507: Based on the second sensor data and preset sensor data, determine the second sensor deviation data corresponding to the second time moment.

[0075] In one specific embodiment, the difference between the second sensing data and the preset sensing data can be determined as the aforementioned second sensing deviation data.

[0076] S509: Determine the flushing flow rate adjustment data based on the current sensor deviation data, the first sensor deviation data, the second sensor deviation data, and the first preset adjustment coefficient.

[0077] In one specific embodiment, the first preset adjustment coefficient may include a first proportional adjustment coefficient, a first integral adjustment coefficient, and a first derivative adjustment coefficient; the flushing flow rate adjustment data can be used to adjust the flushing flow rate. When there is no storage tank 27 on the flushing water path 2, the flushing flow rate is adjusted by adjusting the first DC pump 21; when there is a storage tank 27 on the flushing water path 2, the flushing flow rate is adjusted by adjusting the second DC pump 22.

[0078] Specifically, the above flushing flow rate adjustment data can be determined based on an incremental PID control algorithm, and can be determined using the following formula:

[0079] △U(t)=Kp*(e(t)-e(t-1))+Ki*e(t)+Kd*(e(t)-2*e(t-1)+e(t-2))

[0080] Wherein, △U(t) represents the above-mentioned flushing flow rate adjustment data, Kp represents the above-mentioned first proportional adjustment coefficient, Ki represents the above-mentioned first integral adjustment coefficient, Kd represents the above-mentioned first derivative adjustment coefficient, e(t) represents the above-mentioned current sensing data, e(t-1) represents the above-mentioned first sensing data, and e(t-2) represents the above-mentioned second sensing data.

[0081] In an optional embodiment, the first preset adjustment coefficient can be determined according to the following steps:

[0082] Acquire historical sensor data and corresponding historical flushing flow data;

[0083] Based on preset sensor data, determine the first historical sensor data and the second historical sensor data;

[0084] Based on the first historical sensor data and the second historical sensor data, determine the historical sensor deviation data;

[0085] Based on the first historical flushing flow rate data corresponding to the first historical sensor data and the second historical flushing flow rate data corresponding to the second historical sensor data, the historical flushing flow rate deviation data is determined.

[0086] Based on historical sensor deviation data and historical flushing flow deviation data, the first proportional adjustment coefficient is determined.

[0087] Based on the first proportional adjustment coefficient, the first integral adjustment coefficient and the first derivative adjustment coefficient are determined.

[0088] In one specific embodiment, the preset sensing data may be located between the first historical sensing data and the second historical sensing data.

[0089] In this embodiment of the specification, the parameters in the incremental PID control algorithm can be calibrated using historical sensor data and corresponding historical flushing flow data. Specifically, historical sensor data can be searched based on the expected value of the sensor data to find two historical sensor data points, Des[n] and Des[n-1], that cross the expected value, where Des[n] is greater than the expected value and Des[n-1] is less than the expected value. The corresponding historical flushing flow data, Ope[n] and Ope[n-1], are also found, with Des[n] corresponding to Ope[n] and Ope[n-1] corresponding to Ope[n-1]. The difference between these two historical sensor data points, ΔDes = Des[n] - Des[n-1], and the difference between their corresponding historical flushing flow data, ΔOpe = Ope[n] - Ope[n-1], are then calculated. Dividing the difference between the historical sensor data points and the difference between the historical flushing flow data points yields the first proportional adjustment coefficient Kp = ΔDes / ΔOpe. Furthermore, based on the preset correspondence between the first integral adjustment coefficient, the first derivative adjustment coefficient, and the first proportional adjustment coefficient, the first integral adjustment coefficient and the first derivative adjustment coefficient are determined. Specifically, the preset correspondence can be set according to actual application requirements, for example, Kp = 10 * Ki, Kp = 5 * Kd, but not limited to this.

[0090] S511: Adjust the flushing flow rate based on the flushing flow rate adjustment data until the current sensing deviation data is less than the first preset threshold.

[0091] In one specific embodiment, the first preset threshold can be set according to actual application requirements. After adjusting the flushing flow rate each time and flushing according to the adjusted flushing flow rate, the difference between the sensing data detected by the sensor component 31 at the current moment and the expected value of the sensing data is calculated. If the difference is less than the first preset threshold, flushing can be stopped. Specifically, flushing can also be stopped when the difference is 0, that is, when the current sensing data reaches the expected value.

[0092] In an optional embodiment, the above method may further include:

[0093] Based on the current sensor data, preset sensor data, and the third preset adjustment coefficient, determine the target flushing water usage;

[0094] Rinse at the preset flushing flow rate until the cumulative water usage reaches the target flushing water usage.

[0095] In one specific embodiment, the preset adjustment coefficient and preset flushing water volume can be set according to actual application needs. The flushing can end when the cumulative water usage from the start of the flushing to the current time reaches the target flushing water usage.

[0096] Specifically, the target flushing water usage can be determined using the following formula:

[0097] Q = K * (Y a -Y m )

[0098] Where Q represents the target flushing water usage, Y a The sensor data representing the start time of flushing, Y a The above-mentioned preset sensing data is represented by K, which represents the above-mentioned preset adjustment coefficient.

[0099] In an optional embodiment, when a storage tank is provided in the flushing water path, before acquiring the current sensing data at the first current moment, the first sensing data at the first moment, and the second sensing data at the second moment, the above method may further include:

[0100] Obtain the current pH data, first pH data, and second pH data of the liquid in the storage tank;

[0101] Based on the current pH data and the preset pH data, determine the current pH deviation data at the second current moment;

[0102] Based on the first pH data and the preset pH data, determine the first pH deviation data at the third time.

[0103] Based on the second pH data and the preset pH data, the second pH deviation data at the fourth time point is determined.

[0104] Based on the current pH deviation data, the first pH deviation data, the second pH deviation data, and the second preset adjustment coefficient, the influent flow rate adjustment data is determined;

[0105] Adjust the inlet flow rate of the storage tank based on the inlet flow rate adjustment data until the current pH deviation data is less than the second preset threshold.

[0106] In one specific embodiment, the pH data of the liquid in the storage tank 27 can be obtained based on the pH sensor 24. The current pH data can be the pH data corresponding to the second current moment, the first pH data can be the pH data corresponding to the third moment, and the second pH data can be the pH data corresponding to the fourth moment. Specifically, the second current moment is the time when water begins to enter the storage tank 27, the third moment can be the moment before the second current moment, and the fourth moment can be the moment before the third moment.

[0107] In one specific embodiment, the second preset adjustment coefficient may include a second proportional adjustment coefficient, a second integral adjustment coefficient, and a second derivative adjustment coefficient. The second proportional adjustment coefficient can be calibrated based on historical pH data and corresponding historical influent flow data, while the second integral adjustment coefficient and the second derivative adjustment coefficient can be determined based on their respective preset relationships with the second proportional adjustment coefficient. Specifically, the detailed steps for determining the second proportional adjustment coefficient, the second integral adjustment coefficient, and the second derivative adjustment coefficient can be found in the detailed steps for determining the first preset adjustment coefficient described above, and will not be repeated here.

[0108] In one specific embodiment, the second preset threshold can be set according to actual application requirements. After each adjustment of the inlet flow rate and the introduction of water into the storage tank 27 according to the adjusted inlet flow rate, the difference between the acidity of the pickling solution in the storage tank 27 detected by the pH sensor 24 and the expected acidity value is calculated. If the difference data is less than the second preset threshold, the adjustment of the inlet flow rate or the introduction of water can be stopped. Specifically, the adjustment of the inlet flow rate or the introduction of water can also be stopped when the difference data is 0, that is, when the acidity of the current pickling solution reaches the expected value.

[0109] In practical applications, the above-mentioned flushing strategy can be automatically executed to remove scale based on the scale buildup and blockage inside the water purifier. Alternatively, the flushing process can be started and the above-mentioned flushing strategy executed based on the user's flushing interaction command.

[0110] Regarding the rinsing method in the above embodiments, the water system on which it is based has been described in detail in the embodiments relating to the water system, and will not be repeated here.

[0111] In the above embodiments, based on the acidity data of the pickling solution and water quality-related data, the water intake and rinsing flow rate during the rinsing process can be dynamically adjusted according to their deviations from the expected values, thereby realizing intelligent regulation and control of the water purifier rinsing. At the same time, while ensuring the descaling effect, water-saving performance can also be improved.

[0112] In practical applications, during rinsing using a water system with a storage tank, the amount of water entering the storage tank can be dynamically adjusted based on the acidity of the pickling solution. When the acidity reaches the desired level, the current water flow rate can be maintained, allowing the water purifier to be rinsed with the pickling solution at the expected acidity, thus improving rinsing effectiveness and shortening rinsing time. Furthermore, sensors installed on the drain line can detect the water quality of the water to be discharged after rinsing, obtaining data such as hardness, organic matter, and TDS. This data can then be used to dynamically adjust the amount of rinsing water drawn from the storage tank. When the data meets expectations, the rinsing process can be terminated. During rinsing using a water system without a storage tank, both a pH sensor on the rinsing line and a water quality sensor on the drain line can be used to dynamically adjust the rinsing water volume, balancing rinsing effectiveness and efficiency.

[0113] This application also provides a water purifier, including the above-mentioned water system.

[0114] Specifically, the water purifier may also include a control module to perform the above-mentioned rinsing method.

[0115] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles disclosed herein and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0116] It should be understood that the present invention is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A flushing method for a water system, characterized in that, The water system includes an inlet water path and a return water path. The return water path is connected to the inlet water path. The return water path includes a flushing water path and a drainage water path. The inlet water path includes an outlet. A filter assembly is installed on the inlet water path. The inlet end of the flushing water path is connected to the end of the inlet water path near the outlet. The inlet end of the drainage water path is connected to the wastewater output end of the filter assembly. The rinsing water line is equipped with a negative pressure valve, a DC pump assembly, an evaporating capillary tube, a pH sensor, and a first one-way valve. The drainage water line is equipped with a sensor assembly. The evaporating capillary tube is used to enhance the acidity of the filtered, weakly acidic pure water. The pH sensor is used to measure the pH value of the acidic liquid after treatment by the evaporating capillary tube in real time. The DC pump assembly includes a first DC pump, which is used to adjust the rinsing water volume. During the rinsing process, the first DC pump is adjusted based on the acidity of the pickling solution detected by the pH sensor and the water quality data detected by the sensor assembly, so as to dynamically adjust the rinsing water volume and rinsing time.

2. The flushing method for a water system according to claim 1, characterized in that, The negative pressure valve, the first DC pump, the evaporation capillary, the pH sensor, and the first one-way valve are sequentially arranged on the flushing water path.

3. The flushing method for a water system according to claim 1, characterized in that, The filtration assembly includes a first filter and a second filter. A booster pump is also provided in the water inlet path. The booster pump is located between the first filter and the second filter. The water inlet of the drainage path is connected to the wastewater outlet of the second filter. The outlet of the flushing water path is connected to the inlet of the first filter, or the outlet of the flushing water path is connected to the inlet of the second filter, or the outlet of the flushing water path is connected between the second filter and the sensor assembly.

4. The flushing method for a water system according to claim 1, characterized in that, A drainage valve and a second one-way valve are provided on the drainage waterway, and the sensor assembly, the drainage valve and the second one-way valve are sequentially arranged on the drainage waterway; The sensor assembly includes at least one sensor for detecting water quality.

5. The flushing method for a water system according to any one of claims 1 to 4, characterized in that, The method includes: The sensor component detects current sensing data, first sensing data, and second sensing data; the current sensing data is the sensing data corresponding to the first current time, the first sensing data is the sensing data corresponding to the first time, the second sensing data is the sensing data corresponding to the second time, the first time is the time before the first current time, and the second time is the time before the first time. Based on the current sensing data and the preset sensing data, determine the current sensing deviation data corresponding to the first current moment; Based on the first sensing data and the preset sensing data, the first sensing deviation data corresponding to the first moment is determined; Based on the second sensing data and the preset sensing data, the second sensing deviation data corresponding to the second time moment is determined; Based on the current sensing deviation data, the first sensing deviation data, the second sensing deviation data, and the first preset adjustment coefficient, the flushing flow rate adjustment data is determined; The flushing flow rate is adjusted based on the flushing flow rate adjustment data until the current sensing deviation data is less than a first preset threshold.

6. The flushing method for a water system according to claim 5, characterized in that, The method further includes: Based on the current sensor data, the preset sensor data, and the third preset adjustment coefficient, the target flushing water usage is determined. Rinse at a preset rinsing flow rate until the cumulative water usage reaches the target rinsing water usage.

7. The flushing method for a water system according to claim 5, characterized in that, The first preset adjustment coefficient includes a first proportional adjustment coefficient, a first integral adjustment coefficient, and a first derivative adjustment coefficient, and the first preset adjustment coefficient is determined according to the following steps: Acquire historical sensor data and corresponding historical flushing flow data; Based on the preset sensing data, first historical sensing data and second historical sensing data are determined, wherein the preset sensing data is located between the first historical sensing data and the second historical sensing data. Based on the first historical sensing data and the second historical sensing data, historical sensing deviation data is determined; Based on the first historical flushing flow rate data corresponding to the first historical sensor data and the second historical flushing flow rate data corresponding to the second historical sensor data, the historical flushing flow rate deviation data is determined. Based on the historical sensor deviation data and the historical flushing flow rate deviation data, the first proportional adjustment coefficient is determined; Based on the first proportional adjustment coefficient, the first integral adjustment coefficient and the first derivative adjustment coefficient are determined.

8. A water purifier, characterized in that, It includes a control module to perform the flushing method of the water system as described in any one of claims 1 to 7.

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