Waterway structure, flushing method and water purifier with built-in water tank

Abstract

The application discloses a water route structure, a flushing method and a water purifier with a built-in water tank. The water route structure comprises a water inlet route and a backflow route. The backflow route is connected with the water inlet route. A filter assembly is arranged on the water inlet route. The water inlet end of a water outlet route is connected with the wastewater output end of the filter assembly. The water inlet route comprises a first water inlet route. A water tank is arranged on the first water inlet route. The water inlet end of the water tank is connected with the water outlet end of the filter assembly. The backflow route comprises a first flushing water route and a water outlet route. A first straight-flow pump, an evaporation capillary and a first one-way valve are sequentially arranged on the first flushing water route. The first flushing water route is communicated with the water tank. A sensor assembly is arranged on the water outlet route. The application can realize pickling strategy of the water purifier with the built-in water tank based on the filtered pure water, flush the scaling and clogging of the water purifier, improve the descaling effect and rationality, save water resources and realize sustainable application.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, and in particular to a water circuit structure, flushing method, and water purifier with a built-in water tank. Background Technology

[0002] Because water purifiers are highly effective at purifying water, their popularity in households is increasing. However, during the water purification process, water purifiers filter out a large amount of harmful substances and impurities. These substances adhere to the surface of the filter element, causing blockages in the inlet valve, filter element, and wastewater valve. This significantly affects the filter element's efficiency and filtration effect, impacting the user experience. Summary of the Invention

[0003] To address the aforementioned problems in the prior art, this invention discloses a water circuit structure, flushing method, and water purifier with a built-in water tank. This system enables an acid flushing strategy for the water purifier with the built-in water tank based on filtered pure water, flushing away scale and blockages caused by minerals and microorganisms in the water, improving the descaling effect and efficiency, 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 circuit structure for a water purifier with a built-in water tank is provided, comprising an inlet water circuit and a return water circuit, wherein the return water circuit is connected to the inlet water circuit, a filter assembly is provided on the inlet water circuit, and the inlet end of the drain water circuit is connected to the wastewater outlet end of the filter assembly.

[0005] The water inlet path includes a first water inlet path, on which the water tank is installed, and the water inlet end of the water tank is connected to the water outlet end of the filter assembly;

[0006] The return water path includes a first flushing water path and a drainage water path. The first flushing water path is sequentially equipped with a first DC pump, an evaporation capillary tube, and a first one-way valve. The first flushing water path is connected to the water tank. The drainage water path is equipped with a sensor assembly.

[0007] Optionally, the water inlet path is also provided with a water outlet, and the return water path further includes a second flushing water path, which is connected to the water inlet path and the drainage water path respectively. The water inlet of the second flushing water path is close to the water outlet, and the water outlet of the second flushing water path is located between the filter assembly and the sensor assembly.

[0008] Optionally, a heating device and a second DC pump are also provided in the first water inlet circuit. The second DC pump is located between the water tank and the heating device, and the water outlet of the heating device is connected to the water outlet.

[0009] The water inlet path also includes a second water inlet path. The first water inlet path and the second water inlet path are connected in parallel. The first connection point between the first water inlet path and the second water inlet path is located between the filter assembly and the water tank. The second connection point between the first water inlet path and the second water inlet path is located between the heating device and the water outlet.

[0010] The inlet of the second flushing water path is located between the second connection point and the outlet, or the inlet of the second flushing water path is located between the second connection point and the heating device.

[0011] Optionally, the outlet of the water tank is connected to the second flushing water path, and a third DC pump is provided on the second flushing water path. The connection point between the water tank and the second flushing water path is located between the third DC pump and the inlet of the second flushing water path.

[0012] Optionally, a pH sensor and a buffer tank are also provided in the first flushing water line. The buffer tank is connected to the water tank. The buffer tank, the first DC pump, the evaporation capillary tube, the pH sensor and the first one-way valve are sequentially arranged in the first flushing water line. A water level sensing device is provided in the buffer tank.

[0013] 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.

[0014] The outlet of the first flushing water path is connected to the inlet of the first filter, or the outlet of the first flushing water path is connected to the inlet of the second filter.

[0015] 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;

[0016] The sensor assembly includes at least one sensor for detecting water quality.

[0017] According to another aspect of the disclosed embodiments of the present invention, a flushing method based on the water channel structure described above is provided, the water channel structure including a return water channel, the return water channel including a drainage water channel, and a sensor assembly disposed on the drainage water channel, the method comprising:

[0018] 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 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 current time, and the second time is the time before the first time.

[0019] Based on the current sensing data and the preset sensing data, determine the current sensing deviation data corresponding to the current moment;

[0020] Based on the first sensing data and the preset sensing data, the first sensing deviation data corresponding to the first moment is determined;

[0021] Based on the second sensing data and the preset sensing data, the second sensing deviation data corresponding to the second time moment is determined;

[0022] Based on the current sensing deviation data, the first sensing deviation data, the second sensing deviation data, and the first preset adjustment coefficient, the first flushing flow rate adjustment data is determined;

[0023] Adjust the flushing flow rate based on the first flushing flow rate adjustment data until the current sensing deviation data is less than the first preset threshold.

[0024] 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:

[0025] Acquire historical sensor data and corresponding historical flushing flow data at historical moments;

[0026] 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.

[0027] Based on the first historical sensing data and the second historical sensing data, historical sensing deviation data is determined;

[0028] 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.

[0029] Based on the historical sensor deviation data and the historical flushing flow rate deviation data, the first proportional adjustment coefficient is determined;

[0030] Based on the first proportional adjustment coefficient, the first integral adjustment coefficient and the first derivative adjustment coefficient are determined.

[0031] According to another aspect of the disclosed embodiments of the present invention, a water purifier is provided, including the water circuit structure as described above.

[0032] The technical solutions provided by the embodiments disclosed in this invention bring at least the following beneficial effects:

[0033] The water circuit structure provided by this invention includes an inlet water circuit and a return water circuit. The return water circuit is connected to the inlet water circuit. A filter assembly is installed on the inlet water circuit. The inlet end of the drain water circuit is connected to the wastewater output end of the filter assembly. The inlet water circuit includes a first inlet water circuit, on which a water tank is installed. The inlet end of the water tank is connected to the outlet end of the filter assembly. The return water circuit includes a first flushing water circuit and a drain water circuit. A first DC pump, an evaporation capillary tube, and a first one-way valve are sequentially installed on the first flushing water circuit. The first flushing water circuit is connected to the water tank. A sensor assembly is installed on the drain water circuit. This allows for acidification of the filtered, weakly acidic pure water through the evaporation capillary tube. This enables an acid washing strategy for water purifiers with built-in water tanks, flushing out 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.

[0034] 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

[0035] 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 are not intended to unduly limit the scope of this disclosure.

[0036] Figure 1 This is a schematic diagram of a waterway structure provided in an embodiment of this application;

[0037] Figure 2 This is a schematic diagram of another waterway structure provided in an embodiment of this application;

[0038] Figure 3 This is a schematic flowchart of a rinsing method provided in an embodiment of this application;

[0039] Figure 4 This is a schematic diagram of the structure of a control module provided in an embodiment of this application;

[0040] In the figure, the corresponding reference numerals are as follows: 1-Inlet water path; 11-First filter; 12-Second filter; 13-Second inlet water valve; 14-Booster pump; 2-First inlet water path; 21-Water tank; 22-Heating device; 23-Second DC pump; 24-First inlet water valve; 3-Second inlet water path; 31-Third inlet water valve; 4-First flushing water path; 41-First DC pump; 42-Evaporation capillary; 43-First check valve; 44-pH sensor; 45-Buffer tank; 46-Water level sensor; 5-Second flushing water path; 51-Third DC pump; 6-Drainage water path; 61-Sensor assembly; 62-Drain valve; 63-Second check valve. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] 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.

[0044] This invention provides an acid washing water circuit structure for a water purifier with a built-in water tank. Please refer to [link / reference]. Figure 1 and Figure 2 The water circuit structure includes an inlet water circuit and a return water circuit. The return water circuit is connected to the inlet water circuit. A filter assembly is installed on the inlet water circuit. The inlet end of the drain water circuit is connected to the wastewater outlet end of the filter assembly. The inlet water circuit includes a first inlet water circuit, on which a water tank is installed. The inlet end of the water tank is connected to the outlet end of the filter assembly. The return water circuit includes a first flushing water circuit and a drain water circuit. A first DC pump, an evaporation capillary tube, and a first one-way valve are sequentially installed on the first flushing water circuit. The first flushing water circuit is connected to the water tank. A sensor assembly is installed on the drain water circuit.

[0045] Specifically, the water tank can be used to store water filtered by the filter components, and a sterilization device, such as an ultraviolet sterilization device, can be installed inside the water tank. A first inlet valve can also be installed on the first water inlet line.

[0046] Optionally, the filtration assembly includes a first filter and a second filter, and a booster pump is also provided in the inlet water line. The booster pump is located between the first filter and the second filter. The inlet end of the drain water line is connected to the wastewater outlet end of the second filter. The outlet end of the first flushing water line is connected to the inlet end of the first filter, or the outlet end of the first flushing water line is connected to the inlet end of the second filter.

[0047] In one specific embodiment, the first filter can be a pre-filter, and the second filter can be a post-filter, specifically a reverse osmosis filter (RO filter). A second inlet valve can also be provided on the inlet water line. The second inlet valve can be located before or after the pre-filter. When the second inlet valve and the booster pump are turned on, the water purifier performs water purification operation.

[0048] In a specific embodiment, such as Figure 1 and Figure 2As shown, the outlet of the first flushing water path can have multiple connection methods. Different connection methods can flush different parts of the water path. For example, when the outlet of the flushing water path is connected to the inlet of the first filter, the acid washing solution, after being treated by the evaporation capillary, enters the inlet water path from the outlet of the flushing water path, and then flushes the pre-filter, the second inlet valve, and the reverse osmosis filter. Afterward, it enters the drain water path through the wastewater output of the reverse osmosis filter, passes through the sensor assembly, flushes the drain valve, and is discharged from the drain outlet. Similarly, when the outlet of the flushing water path is connected to the inlet of the second filter, the acid washing solution, after being treated by the evaporation capillary, enters the inlet water path from the outlet of the flushing water path, and then flushes the reverse osmosis filter. Afterward, it enters the drain water path through the wastewater output of the reverse osmosis filter, passes through the sensor assembly, flushes the drain valve, and is discharged from the drain outlet. Furthermore, multiple flushing water path combinations can be set based on the internal water path structure of the water purifier to improve the comprehensiveness of flushing and enhance the overall descaling effect.

[0049] In practical applications, tap water enters the water purifier through the inlet of the water inlet circuit. After passing through 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.

[0050] Based on this characteristic, a branch (i.e., the first flushing water path) can be added after the water tank. Water filtered by the pre-filter and reverse osmosis filter is introduced into the flushing water path through a negative pressure valve and a DC pump. After passing through the evaporation capillary, the acidity of the weakly acidic liquid entering the evaporation capillary is enhanced. This allows a stronger acidic liquid to flush the internal water system of the water purifier through the flushing water path, and the flushed liquid is discharged from the drain path. Based on the first flushing water path and the device settings 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.

[0051] Optionally, a drain valve and a second check valve are provided in the drainage water line, and the sensor assembly, the drain valve and the second check valve are sequentially arranged in the drainage water line; the sensor assembly includes at least one sensor for detecting water quality.

[0052] Specifically, the drain valve can be an electromagnetic valve, and the sensors used to detect water quality can include hardness sensors, microbial sensors, total dissolved solids (TDS) sensors, etc.

[0053] Optionally, an outlet is also provided in the inlet water path, and the return water path also includes a second flushing water path. The second flushing water path is connected to the inlet water path and the drain water path respectively. The inlet end of the second flushing water path is close to the outlet, and the outlet end of the second flushing water path is located between the filter assembly and the sensor assembly.

[0054] Specifically, 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 users. The second flushing water path can be used to flush the devices on the first inlet water path, and the flushed liquid is discharged through the drain water path.

[0055] In practical applications, the water filtered by the filter assembly is stored in a water tank. Part of the water in the tank is used as a buffer tank. The first DC pump is turned on to draw water from the buffer tank into the first flushing water path. After being processed by the evaporation capillary, the pickling solution is obtained. The pickling solution then passes through the first flushing water path and the inlet water path to flush the devices on the inlet water path. Part of the water enters the drain water path from the wastewater outlet of the reverse osmosis filter. After passing through the sensor assembly, the drain valve is flushed and then discharged from the drain outlet. Part of the water passes through the first inlet water path to flush the water tank, and then enters the drain water path through the second flushing water path. After passing through the sensor assembly, the drain valve is flushed and then discharged from the drain outlet.

[0056] Optionally, the first water inlet path is also equipped with a heating device and a second DC pump. The second DC pump is located between the water tank and the heating device, and the outlet end of the heating device is connected to the water outlet. The water inlet path also includes a second water inlet path. The first water inlet path and the second water inlet path are connected in parallel. The first connection point between the first water inlet path and the second water inlet path is located between the filter assembly and the water tank. The second connection point between the first water inlet path and the second water inlet path is located between the heating device and the water outlet. The inlet end of the second flushing path is located between the second connection point and the water outlet, or the inlet end of the second flushing path is located between the second connection point and the heating device.

[0057] In one specific embodiment, the second DC pump can be used to supply water from the water tank to the heating device, thereby providing water to the user. The first inlet water path can be a hot water supply path, and the second inlet water path can be a room temperature water supply path. Tap water enters the water purifier via the inlet water path towards the outlet. After the reverse osmosis filter, the inlet water path branches into the first inlet water path and the second inlet water path. The first and second inlet water paths merge into a single water path before the outlet, connecting to the outlet to supply filtered pure water to the user. A third inlet water valve can also be installed on the second inlet water path. The position of the inlet end of the second flushing water path can be set according to actual application requirements.

[0058] Optionally, the outlet of the water tank is connected to the second flushing water path, and a third DC pump is installed on the second flushing water path. The connection point between the water tank and the second flushing water path is located between the inlet of the third DC pump and the inlet of the second flushing water path.

[0059] Specifically, when the third DC pump is turned on, the water in the water tank and heating device can be discharged through the second flushing water path and the drainage water path.

[0060] Optionally, a pH sensor and a buffer tank are also installed in the first flushing water line. The buffer tank is connected to the water tank. The buffer tank, the first DC pump, the evaporation capillary tube, the pH sensor and the first one-way valve are sequentially installed in the first flushing water line. A water level sensing device is installed in the buffer tank.

[0061] Specifically, the buffer tank is connected to the water tank, allowing water from the tank to enter the buffer tank. With the first DC pump running, water is drawn from the buffer tank and processed through the evaporation capillary tube to obtain an acidic cleaning solution for rinsing the water purifier. A pH sensor measures the pH value of the acidic cleaning solution obtained through the evaporation capillary tube. When the acidity of the solution reaches a certain level, the internal water system of the water purifier is flushed to improve the descaling effect.

[0062] In practical applications, the water filtered by the filter assembly is stored in a water tank. Part of the water in the tank is used as a buffer tank. The first DC pump is turned on to draw water from the buffer tank into the first flushing water path. After being processed by the evaporation capillary, the pickling solution is obtained. The pickling solution then passes through the first flushing water path and the inlet water path to flush the devices on the inlet water path. Part of the water enters the drain water path from the wastewater outlet of the reverse osmosis filter. After passing through the sensor assembly, the drain valve is flushed and discharged from the drain outlet. Part of the water passes through the first inlet water path to flush the water tank, the second DC pump, and the heating device. It then enters the drain water path through the second flushing water path. After passing through the sensor assembly, the drain valve is flushed and discharged from the drain outlet. During this process, the acidity of the pickling solution detected by the pH sensor can be acquired in real time. The first DC pump is adjusted based on the acidity to regulate the rinsing water volume, ensuring the acidity of the pickling solution reaches the desired level. Alternatively, the first DC pump can be adjusted using water quality data detected by the sensor components 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 level, at which point rinsing can be stopped. The rinsing water volume can also be dynamically adjusted by combining the acidity data and water quality data, improving rinsing efficiency and conserving water while ensuring rinsing effectiveness.

[0063] As can be seen from the technical solutions provided in the embodiments of this specification above, the water circuit structure in this specification includes an inlet water circuit and a return water circuit. The return water circuit is connected to the inlet water circuit. A filter assembly is installed on the inlet water circuit. The inlet end of the drain water circuit is connected to the wastewater outlet end of the filter assembly. The inlet water circuit includes a first inlet water circuit, on which a water tank is installed. The inlet end of the water tank is connected to the outlet end of the filter assembly. The return water circuit includes a first flushing water circuit and a drain water circuit. A first DC pump, an evaporation capillary tube, and a first one-way valve are sequentially installed on the first flushing water circuit. The first flushing water circuit is connected to the water tank. A sensor assembly is installed on the drain water circuit. This allows the acidity of the filtered, weakly acidic pure water to be enhanced through the evaporation capillary tube. This enables the acid washing strategy of the water purifier with a built-in water tank, flushing out 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.

[0064] The following describes a flushing method based on the water channel structure provided in the above embodiments of this application, such as... Figure 3 As shown, the above method may include:

[0065] S301: Acquire the current sensing data, first sensing data and second sensing data detected by the sensor components.

[0066] In one specific embodiment, the current sensing data can be the sensing data corresponding to the 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 current moment can be the flushing start moment, the first moment can be the moment before the current moment, and the second moment can be the moment before the first moment.

[0067] In one specific embodiment, the sensor assembly 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.

[0068] S303: Based on the current sensing data and preset sensing data, determine the current sensing deviation data corresponding to the current moment.

[0069] 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.

[0070] S305: Based on the first sensing data and preset sensing data, determine the first sensing deviation data corresponding to the first moment.

[0071] 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.

[0072] S307: Based on the second sensor data and preset sensor data, determine the second sensor deviation data corresponding to the second time moment.

[0073] 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.

[0074] S309: 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.

[0075] 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, specifically, the flushing flow rate can be adjusted by adjusting the first DC pump.

[0076] Specifically, the above flushing flow rate adjustment data can be determined based on an incremental PID controller, and can be determined using the following formula:

[0077] △U(t)=Kp*(e(t)-e(t-1))+Ki*e(t)+Kd*(e(t)-2*e(t-1)+e(t-2))

[0078] 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.

[0079] In an optional embodiment, the first preset adjustment coefficient can be determined according to the following steps:

[0080] Acquire historical sensor data and corresponding historical flushing flow data;

[0081] Based on preset sensor data, determine the first historical sensor data and the second historical sensor data;

[0082] Based on the first historical sensor data and the second historical sensor data, determine the historical sensor deviation data;

[0083] 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.

[0084] Based on historical sensor deviation data and historical flushing flow deviation data, the first proportional adjustment coefficient is determined.

[0085] Based on the first proportional adjustment coefficient, the first integral adjustment coefficient and the first derivative adjustment coefficient are determined.

[0086] In one specific embodiment, the preset sensing data may be located between the first historical sensing data and the second historical sensing data.

[0087] 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.

[0088] S311: 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.

[0089] 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 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.

[0090] In an optional embodiment, the above method may further include:

[0091] Acquire the current pH data, first pH data, and second pH data detected by the pH sensor;

[0092] Based on the current pH data and the preset pH data, determine the current pH deviation data at the current moment;

[0093] Based on the first pH value data and the preset pH value data, determine the first pH value deviation data at the first moment;

[0094] Based on the second pH data and the preset pH data, determine the second pH deviation data at the second time point;

[0095] Based on the current pH deviation data, the first pH deviation data, the second pH deviation data, and the second preset adjustment coefficient, the second flushing flow rate adjustment data is determined;

[0096] The flushing water volume is adjusted based on the second flushing flow rate adjustment data until the current pH deviation data is less than the second preset threshold.

[0097] In one specific embodiment, the current pH data can be the pH data corresponding to the current moment, the first pH data can be the pH data corresponding to the first moment, and the second pH data can be the pH data corresponding to the second moment. Specifically, the current moment can be the rinsing start moment, the first moment can be the moment before the current moment, and the second moment can be the moment before the first moment.

[0098] 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.

[0099] In one specific embodiment, the second preset threshold can be set according to actual application needs. After each adjustment of the inlet water flow rate, the difference between the acidity of the pickling solution detected by the pH sensor at the current moment and the expected acidity value is calculated. The first DC pump is then adjusted to regulate the rinsing water volume. If the difference data is less than the second preset threshold, the adjustment of the rinsing water volume is paused. Specifically, the adjustment of the rinsing water volume can also be paused when the difference data is 0, that is, when the acidity of the current pickling solution reaches the expected value. Furthermore, the rinsing water volume can be adjusted again based on the water quality data detected by the sensor components to achieve the desired rinsing effect.

[0100] 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.

[0101] Regarding the rinsing method in the above embodiments, the water channel structure on which it is based has been described in detail in the embodiments relating to the water channel structure, and will not be repeated here.

[0102] In the above embodiments, the flushing flow rate during the rinsing process can be dynamically adjusted based on the acidity data of the pickling solution and water quality-related data, according to their deviations from the expected values. This enables intelligent regulation and control of the water purifier's rinsing process, while also improving water-saving performance while ensuring the descaling effect.

[0103] This application also provides a water purifier, including the above-described water circuit structure.

[0104] Specifically, the water purifier may also include a control module to perform the above-mentioned rinsing method.

[0105] This application also provides a schematic diagram of the structure of a control module, such as... Figure 4 As shown, the control module 400 includes a processor 410, and optionally, a memory 420 and a communication interface 430 connected to the processor 410. The processor 410, memory 420, and communication interface 430 are connected via a bus 440.

[0106] Processor 410 may be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. Processor 410 may also be any other device with processing capabilities, such as a circuit, device, or software module. Processor 410 may also include multiple CPUs, and processor 410 may be a single-core processor or a multi-core processor. Here, "processor" can refer to one or more devices, circuits, or processing cores used to process data (e.g., computer program instructions).

[0107] The memory 420 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or it may be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer. This application embodiment does not impose any limitations on this. The memory 420 may exist independently or may be integrated with the processor 410. The memory 420 may contain computer program code. The processor 410 is used to execute the computer program code stored in the memory 420, thereby implementing the rinsing method provided in this application embodiment.

[0108] The communication interface 430 can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc.). The communication interface 430 can be a module, circuit, transceiver, or any device capable of enabling communication.

[0109] Bus 440 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. Bus 440 can be divided into address bus, data bus, control bus, etc.

[0110] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer-executable instructions. When these computer-executable instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer-executable instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer-executable instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks, SSDs), etc.

[0111] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, specific embodiments have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in a different order than that shown in the embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result.

[0112] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0113] 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.

[0114] 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 water circuit structure for a water purifier with a built-in water tank, characterized in that, It includes an inlet water path and a return water path, the return water path being connected to the inlet water path, a filter assembly being installed on the inlet water path, and the inlet end of the outlet water path being connected to the wastewater outlet end of the filter assembly; The water inlet path includes a first water inlet path, on which the water tank is installed. The water inlet of the water tank is connected to the water outlet of the filter assembly. The filter assembly includes a reverse osmosis filter, and the water outlet of the filter assembly is weakly acidic. The return water path includes a first flushing water path and a drainage water path. The first flushing water path is sequentially equipped with a buffer tank, a first DC pump, an evaporation capillary tube, a pH sensor, and a first one-way valve. The first flushing water path is connected to the water tank. The drainage water path is equipped with a sensor assembly. The sensor assembly is used to detect water quality and obtain water quality data. The pH sensor is used to detect the acidity of the pickling solution obtained through the evaporation capillary, so that the first DC pump is adjusted according to the acidity of the pickling solution and the water quality data to adjust the rinsing water volume.

2. The waterway structure according to claim 1, characterized in that, The water inlet path is also provided with a water outlet, and the return water path also includes a second flushing water path. The second flushing water path is connected to the water inlet path and the water outlet path respectively. The water inlet end of the second flushing water path is close to the water outlet, and the water outlet end of the second flushing water path is located between the filter assembly and the sensor assembly.

3. The waterway structure according to claim 2, characterized in that, A heating device and a second DC pump are also provided in the first water inlet line. The second DC pump is located between the water tank and the heating device, and the water outlet of the heating device is connected to the water outlet. The water inlet path also includes a second water inlet path. The first water inlet path and the second water inlet path are connected in parallel. The first connection point between the first water inlet path and the second water inlet path is located between the filter assembly and the water tank. The second connection point between the first water inlet path and the second water inlet path is located between the heating device and the water outlet. The inlet of the second flushing water path is located between the second connection point and the outlet, or the inlet of the second flushing water path is located between the second connection point and the heating device.

4. The waterway structure according to claim 2, characterized in that, The outlet of the water tank is connected to the second flushing water path, and a third DC pump is installed on the second flushing water path. The connection point between the water tank and the second flushing water path is located between the third DC pump and the inlet of the second flushing water path.

5. The waterway structure according to claim 1, characterized in that, The buffer tank is equipped with a water level sensor.

6. The waterway structure 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 first flushing water path is connected to the inlet of the first filter, or the outlet of the first flushing water path is connected to the inlet of the second filter.

7. The waterway structure 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.

8. A flushing method based on the water channel structure according to any one of claims 1 to 7, characterized in that, The waterway structure includes a return waterway, the return waterway includes a drainage waterway, and a sensor assembly is installed on the drainage waterway. 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 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 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 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 first flushing flow rate adjustment data is determined; Adjust the flushing flow rate based on the first flushing flow rate adjustment data until the current sensing deviation data is less than the first preset threshold.

9. The rinsing method according to claim 8, 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 at historical moments; 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.

10. A water purifier, characterized in that, Includes the waterway structure as described in any one of claims 1 to 7.

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