Water softener and control method and control device thereof

Abstract

The invention discloses a water softener and a control method and a control device thereof, and relates to the technical field of water treatment.The water softener comprises a sterilization module and a water softening tank, the sterilization module is used for generating sterilization liquid through electrolysis and outputting the sterilization liquid, and the output end of the sterilization module is connected with the water softening tank so as to output the sterilization liquid to the water softening tank for sterilization; the water softener control method comprises the steps that the current concentration of sterilizing liquid output by a sterilizing module is obtained; on the basis of the obtained current concentration of the sterilizing liquid, the input voltage input to the sterilizing module is adjusted so that the current concentration of the sterilizing liquid can approach the target concentration, and the input voltage input to the sterilizing module and the current concentration of the sterilizing liquid output by the sterilizing module are in positive correlation. The application aims to improve the sterilization effect of the sterilization module on the soft water tank so as to improve the sterilization reliability.

Description

Technical Field

[0001] This application relates to the field of water treatment technology, and in particular to a water softener and its control method and control device. Background Technology

[0002] Water softeners utilize ion exchange technology, where functional ions from the resin in the resin tank exchange with calcium and magnesium ions in the water to remove scale and ensure the quality of bathing and drinking water. However, the resin in the tank, when immersed in water for extended periods, easily creates a breeding ground for microorganisms, leading to secondary water pollution. To address this, water softeners incorporate a sterilization module to sterilize the resin tank. During the resin regeneration stage, the sterilization module electrolyzes brine, converting chloride ions in the brine into bactericidal substances such as sodium hypochlorite. However, existing sterilization modules suffer from poor sterilization effectiveness and low reliability. Summary of the Invention

[0003] In view of the above problems, this application provides a water softener and its control method and control device, which aims to improve the sterilization effect of the sterilization module on the resin tank, so as to improve the sterilization reliability.

[0004] To achieve the above objectives, in a first aspect, this application proposes a water softener control method. The water softener includes a sterilization module and a water softener tank. The sterilization module is used to electrolyze and generate a sterilizing solution and output it. The output terminal of the sterilization module is connected to the water softener tank to output the sterilizing solution to the water softener tank for sterilization. The water softener control method includes: Obtain the current concentration of the disinfectant solution output by the disinfection module; Based on the current concentration of the bactericidal solution, the input voltage to the bactericidal module is adjusted so that the current concentration of the bactericidal solution approaches the target concentration. The input voltage to the bactericidal module is positively correlated with the current concentration of the bactericidal solution output by the bactericidal module.

[0005] In one embodiment, the sterilization module includes an electrolysis device and an ejector. The electrolysis device is used to electrolyze and generate an electrolyte. The two input terminals of the ejector are connected one-to-one to a water source and the output terminal of the electrolysis device. The output terminal of the ejector is connected to the soft water tank to output a sterilization solution produced by mixing the water source and the electrolyte to the soft water tank. The current concentration of the sterilizing solution output by the sterilization module includes: Obtain the output flow rate of the electrolyte in the electrolysis device; Based on the obtained output flow rate of the electrolyte, the current concentration of the bactericide output by the ejector is determined. The output flow rate of the electrolyte in the electrolysis device is positively correlated with the current concentration of the bactericide output by the ejector. The current concentration of the bactericidal solution output by the ejector is determined as the current concentration of the bactericidal solution output by the bactericidal module.

[0006] In one embodiment, before determining the current concentration of the bactericidal solution output by the ejector based on the acquired electrolyte output flow rate, the method includes: Obtain the operating current of the electrolysis unit; The step of determining the current concentration of the bactericide output by the ejector based on the obtained electrolyte output flow rate, wherein the positive correlation between the electrolyte output flow rate of the electrolysis device and the current concentration of the bactericide output by the ejector includes: Based on the acquired operating current and output flow rate, the current concentration of the bactericidal solution output by the ejector is determined. The output flow rate of the electrolyte in the electrolysis device is positively correlated with the current concentration of the bactericidal solution output by the ejector, and the operating current of the electrolysis device is positively correlated with the current concentration of the bactericidal solution output by the ejector.

[0007] In one embodiment, a flow detection device is provided upstream or downstream of the electrolysis device, and obtaining the output flow rate of the electrolyte in the electrolysis device includes: Acquire the detection signal from the flow detection device; The output flow rate of the electrolyte in the electrolysis device is determined based on the detection signal from the flow detection device.

[0008] In one embodiment, the water softener control method further includes: If the output flow rate of the electrolyte in the electrolysis device is less than the preset value, the electrolysis device shall be stopped. When the output flow rate of the electrolyte in the electrolysis device is not less than the preset value, the electrolysis device is controlled to perform electrolysis.

[0009] In one embodiment, the electrolysis device includes an electrode assembly. The step of adjusting the input voltage to the sterilization module based on the current concentration of the sterilizing solution to make the current concentration of the sterilizing solution approach the target concentration, wherein the input voltage to the sterilization module is positively correlated with the current concentration of the sterilizing solution output by the sterilization module, includes: Based on the current concentration of the bactericidal solution, the input voltage of the electrode assembly in the electrolysis device is adjusted so that the current concentration of the bactericidal solution approaches the target concentration. The input voltage of the electrode assembly is positively correlated with the current concentration of the bactericidal solution output by the bactericidal module.

[0010] In one embodiment, the electrolysis device is provided with a plurality of electrode assemblies, each electrode assembly including a positive electrode plate and a negative electrode plate disposed in the electrolysis device; the plurality of electrode assemblies are connected in series sequentially, wherein the negative electrode plate of the preceding electrode assembly is electrically connected to the positive electrode plate of the following electrode assembly, the positive electrode plate of the front electrode assembly is the positive terminal of the series connection of the plurality of electrode assemblies, and the negative electrode plate of the rear electrode assembly is the negative terminal of the series connection of the plurality of electrode assemblies; The step of adjusting the input voltage of the electrode assembly in the electrolysis device based on the current concentration of the bactericidal solution to make the current concentration of the bactericidal solution approach the target concentration, wherein the input voltage of the electrode assembly is positively correlated with the current concentration of the bactericidal solution output by the bactericidal module, includes: Based on the current concentration of the sterilizing solution, the input voltage to the series positive and negative terminals of the electrolysis device is adjusted so that the current concentration of the sterilizing solution approaches the target concentration. The input voltage to the series positive and negative terminals is positively correlated with the current concentration of the sterilizing solution output by the sterilization module.

[0011] In one embodiment, adjusting the input voltage between the series positive and series negative terminals of the electrolysis device based on the current concentration of the bactericide solution to make the current concentration of the bactericide solution approach the target concentration includes: Based on the current concentration of the bactericide solution, determine the difference between the current concentration of the bactericide solution and the target concentration; The target input voltage is calculated based on the number of electrode assemblies and the determined concentration difference. The input voltage, which is connected in series between the positive and negative terminals of the electrolysis device, is adjusted to the target input voltage so that the current concentration of the bactericide solution approaches the target concentration.

[0012] Secondly, this application also provides a control device configured to implement the water softener control method described above.

[0013] Thirdly, this application also provides a water softener, the water softener comprising: A sterilization module, which is used to electrolyze and generate a sterilization solution and output it; A water softener tank, wherein the output of the sterilization module is connected to the water softener tank for outputting sterilization solution to the water softener tank; and The control device as described above.

[0014] In one embodiment, the sterilization module includes an electrolysis device and an ejector. The electrolysis device is used to electrolyze and generate an electrolyte. The two input terminals of the ejector are connected one-to-one to a water source and the output terminal of the electrolysis device. The output terminal of the ejector is connected to the soft water tank to output a sterilization solution produced by mixing the water source and the electrolyte to the soft water tank.

[0015] In one embodiment, the water softener further includes a flow detection device, which is located in the passage between the electrolysis device and the ejector, and / or the flow detection device is located at the input end of the electrolysis device, and / or the flow detection device is located at the output end of the ejector.

[0016] In one embodiment, the electrolysis device is provided with a plurality of electrode assemblies, each electrode assembly including a positive electrode plate and a negative electrode plate disposed in the electrolysis device; the plurality of electrode assemblies are connected in series sequentially, wherein the negative electrode plate of the preceding electrode assembly is electrically connected to the positive electrode plate of the following electrode assembly, the positive electrode plate of the front electrode assembly is the positive terminal of the series connection of the plurality of electrode assemblies, and the negative electrode plate of the rear electrode assembly is the negative terminal of the series connection of the plurality of electrode assemblies.

[0017] In one embodiment, the electrolysis device is a residual chlorine generator.

[0018] In summary, the water softener control method provided in this application aims to improve the sterilization effect of the sterilization module on the resin tank, thereby enhancing sterilization reliability. Specifically, by acquiring the current concentration of the sterilization solution in the sterilization module and adjusting the input voltage to bring the current concentration close to the target concentration, real-time detection and dynamic adjustment of the sterilization solution concentration are achieved. This ensures that the current concentration of the sterilization solution remains stable within the target concentration range, avoiding fluctuations in the output concentration of the sterilization solution that could affect the sterilization effect, thus improving sterilization reliability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 A flowchart of the first embodiment of the water softener control method provided in this application; Figure 2 This is a schematic diagram of an embodiment of the water softener provided in this application; Figure 3 A flowchart of the second embodiment of the water softener control method provided in this application; Figure 4 A flowchart of the third embodiment of the water softener control method provided in this application; Figure 5 A flowchart of the fourth embodiment of the water softener control method provided in this application; Figure 6 A flowchart of the fifth embodiment of the water softener control method provided in this application; Figure 7 This is a schematic diagram of another embodiment of the water softener provided in this application; Figure 8 This is a schematic diagram of an embodiment of the electrolysis apparatus provided in this application.

[0021] Explanation of icon numbers: 10. Control device; 20. Water softener; 21. Brine tank; 22. Current detection device; 23. Flow detection device; 24. Water distributor; 25. Electrolysis device; 26. Ejector; 27. Soft water tank; 28. Electrode assembly; 281. Positive electrode plate; 282. Negative electrode plate.

[0022] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0025] In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0028] It should be noted that step designations such as S100 and S200 are used in this document for the purpose of more clearly and concisely describing the corresponding content, and do not constitute a substantial limitation on the order. In specific implementation, those skilled in the art may execute S200 first and then S100, etc., but these should all be within the protection scope of this application.

[0029] Water softeners use ion exchange technology, which replaces hardness ions such as calcium and magnesium in the raw water with sodium ions through cation exchange resin filled in a resin tank. This effectively removes limescale and improves bathing comfort and drinking water quality. However, because the resin is immersed in water for a long time, it is very easy for microorganisms and bacteria to grow, which can lead to secondary water pollution and affect users' health.

[0030] To address these issues, traditional water softeners incorporate a sterilization module that actively sterilizes the resin tank during the resin regeneration stage. This module electrolyzes saturated brine, converting chloride ions into highly oxidizing sodium hypochlorite and other effective sterilizing components under an electric field. This sodium hypochlorite is then injected into the resin tank, achieving highly efficient sterilization of the resin bed and the tank interior. This inhibits microbial growth and ensures the safety and hygiene of the treated water.

[0031] In the electrolysis sterilization module of a water softener, the intensity of the electrolysis reaction can be controlled by its input voltage. This input voltage is applied to the electrodes of the electrolysis cell in the sterilization module, causing the chloride ions in the brine to undergo an oxidation reaction, generating sodium hypochlorite, which has a bactericidal effect. Theoretically, the concentration of the electrolyte is related to both the input voltage and the brine concentration. For example, the sterilization module uses a fixed input voltage to control the entire electrolysis process. However, the brine concentration inevitably fluctuates, causing the electrolyte concentration to change with the brine concentration. This ultimately leads to the generated electrolyte or sterilization solution deviating from the target concentration range. Consequently, excessively high concentrations may cause resin oxidation damage, while excessively low concentrations may result in incomplete sterilization, poor sterilization effect, and low sterilization reliability.

[0032] To address the aforementioned issues, this application provides a water softener control method aimed at improving the sterilization effect of the sterilization module on the resin tank, thereby enhancing sterilization reliability.

[0033] In one embodiment of this application, as Figure 7 As shown, the water softener 20 includes a sterilization module and a water softener tank 27. The sterilization module is used to electrolyze and generate sterilization solution and output it. The output end of the sterilization module is connected to the water softener tank 27 to output sterilization solution to the water softener tank 27 for sterilization.

[0034] Optionally, such as Figure 7As shown, the sterilization module can simultaneously accept saline solution and tap water or soft water. The saline solution first enters the electrolysis chamber of the sterilization module, where an electrolytic reaction occurs under the input voltage. An oxidation reaction occurs at the anode, converting chloride ions into hypochlorite or hypochlorous acid, while hydrogen and hydroxide ions are generated at the cathode, ultimately producing a high-concentration electrolyte rich in effective sterilizing components such as sodium hypochlorite. Subsequently, this electrolyte is mixed and diluted with the supplied tap water or soft water in a certain proportion to form a chlorine-containing sterilizing solution with a concentration close to the target and strong oxidizing properties. The sterilization module can be connected to a soft water tank 27 via a pipe to output the sterilizing solution to the soft water tank 27. Optionally, the soft water tank 27 can be a resin tank filled with sodium-type cation exchange resin, used to adsorb calcium and magnesium ions in the raw water and release sodium ions during the softening stage, thereby reducing water hardness. During the sterilization stage, the resin tank receives the sterilizing solution from the sterilization module to kill bacteria, biofilms, and other microbial contaminants attached to the resin surface and the inner wall of the tank. After the sterilization module completes the injection of sterilization solution and achieves full contact, the soft water tank 27 has an outlet to discharge waste liquid containing residual sterilization components and impurities.

[0035] It should be noted that, in the embodiments of this application, unless otherwise specified, electrolyte refers to the high-concentration chlorine-containing solution output by an electrolysis device, such as a residual chlorine generator, after the electrolysis reaction is completed, usually with sodium hypochlorite as the main effective component; while bactericidal solution refers to the low-concentration solution formed by diluting and mixing the electrolyte with water, such as tap water or softened water, in a certain proportion, with an effective chlorine concentration significantly lower than that of the original electrolyte, and can be directly transported to a soft water tank for subsequent sterilization or disinfection purposes.

[0036] In one embodiment, such as Figure 1 As shown, the water softener control method includes steps S100 and S200.

[0037] In this embodiment, step S100 involves obtaining the current concentration of the sterilization solution output by the sterilization module.

[0038] Optionally, the current concentration of the disinfectant output by the disinfection module can be calculated based on the output flow rate of the electrolyte and the concentration of the connected brine. The concentration of the brine can be determined by the operating current of the disinfection module. Once the brine concentration (operating current of the disinfection module) and the electrolyte flow rate are obtained, the concentration of the disinfectant after combining with the connected tap water or soft water can be determined.

[0039] Optionally, the current concentration of the sterilization solution output by the sterilization module can be indirectly estimated by measuring the physical properties of the sterilization solution, for example, by measuring the conductivity using a conductivity meter and converting it into a concentration value according to a preset mapping relationship.

[0040] In this embodiment, step S200 involves adjusting the input voltage to the sterilization module based on the current concentration of the sterilization solution, so that the current concentration of the sterilization solution approaches the target concentration. The input voltage to the sterilization module is positively correlated with the current concentration of the sterilization solution output by the sterilization module.

[0041] The input voltage to the sterilization module is positively correlated with the current concentration of the sterilizing solution output by the module. That is, as the input voltage increases, the current concentration of the sterilizing solution increases accordingly, and as the input voltage decreases, the current concentration of the sterilizing solution decreases accordingly. This is understandable because when a voltage is applied to the sterilization module, a current is generated in the circuit, driving an electrochemical reaction in the brine to produce an electrolyte. This electrolyte is the main active component of the sterilizing solution, and its concentration and flow rate determine the overall concentration of the sterilizing solution. The input voltage directly affects the magnitude of the electrolytic current. When the electrolyte composition is stable, increasing the input voltage increases the potential difference between the electrodes, thereby increasing the ion migration rate and electron transfer rate, resulting in a larger electrolytic current. Consequently, more chloride ions are oxidized per unit time, generating more available chlorine, ultimately increasing the output electrolyte concentration. Conversely, decreasing the input voltage reduces the amount of available chlorine generated, and the concentration decreases accordingly.

[0042] The input voltage to the sterilization module is adjusted based on the current concentration of the sterilizing solution. This can be achieved using an adjustable regulated power supply, or by changing the effective value of the input voltage through a pulse width modulation controller, such as adjusting the duty cycle of the pulse signal. Of course, the voltage adjustment method can be determined based on the actual input method and is not limited here. It is understood that the electrolysis chamber of the sterilization module is equipped with at least one pair of electrode assemblies 28, each having a pair of electrode plates, which can be an anode and a cathode. The input voltage to the sterilization module can specifically be the voltage applied between the anode and the cathode.

[0043] It should be noted that the target concentration can be a specific set value or a concentration range that is allowed to fluctuate, depending on the actual application requirements, and will not be limited here.

[0044] It is understandable that when the water softener 20 operates in sterilization mode, the sterilization module electrolyzes to generate a sterilizing solution and outputs it to the water softener tank 27 for sterilization. Since the concentration of the sterilizing solution output by the sterilization module inevitably fluctuates, its sterilization effect is poor and its reliability is low. Therefore, in this embodiment, the control device 10 can acquire the current concentration of the sterilizing solution in real time and dynamically adjust the input voltage to the sterilization module based on this current concentration information, so that the current concentration of the final output sterilizing solution approaches the target concentration. In this way, by continuously detecting the actual concentration and adjusting the voltage parameters, it can be ensured that the current concentration of the sterilizing solution remains stable within the target concentration range, avoiding the impact of fluctuations in the output concentration of the sterilizing solution on the sterilization effect, thereby improving sterilization reliability. In one feasible embodiment, when the current concentration is lower than the target concentration, the input voltage is increased to increase the electrolysis current and the effective chlorine generation rate, thereby increasing the sterilizing solution concentration; conversely, when the current concentration is higher than the target concentration, the input voltage is decreased to reduce the electrolysis intensity and avoid excessive chlorine production. Furthermore, the adjustment range is not fixed, but proportional to the absolute value of the concentration deviation; that is, the greater the difference between the current concentration and the target concentration, the greater the voltage change required for adjustment. For example, proportional control or proportional-integral control can be used to map the concentration deviation into a corresponding voltage correction amount, achieving fast, smooth, and precise closed-loop adjustment.

[0045] In summary, the water softener control method provided in this application aims to improve the sterilization effect of the sterilization module on the resin tank, thereby enhancing sterilization reliability. Specifically, by acquiring the current concentration of the sterilization solution in the sterilization module and adjusting the input voltage to bring the current concentration close to the target concentration, real-time detection and dynamic adjustment of the sterilization solution concentration are achieved. This ensures that the current concentration of the sterilization solution remains stable within the target concentration range, avoiding fluctuations in the output concentration of the sterilization solution that could affect the sterilization effect, thus improving sterilization reliability.

[0046] In one embodiment, such as Figure 2 and Figure 7 As shown, the sterilization module includes an electrolysis device 25 and an ejector 26. The electrolysis device 25 is used to electrolyze and generate an electrolyte. The two input terminals of the ejector 26 are connected one-to-one to the water source and the output terminal of the electrolysis device 25. The output terminal of the ejector 26 is connected to the soft water tank 27 to output the sterilization solution produced by mixing the water source and the electrolyte to the soft water tank 27.

[0047] Optionally, the electrolysis device 25 is a residual chlorine generator. The residual chlorine generator is used to introduce brine and, under the action of an electric field, converts chloride ions into components such as sodium hypochlorite with bactericidal activity, generating a high-concentration electrolyte, namely a hypochlorous acid solution. This high-concentration electrolyte is then transported to one input end of the ejector 26, while the other input end of the ejector 26 is connected to a water source (such as tap water or softened water). Using the ejector 26, when the water source flows at high speed through the throat of the ejector 26, a negative pressure is formed on the side wall, thereby automatically drawing in the electrolyte and achieving full mixing of the two in the mixing chamber, forming a bactericidal solution with a lower concentration than the high-concentration electrolyte. Finally, this bactericidal solution is directly injected into the soft water tank 27 from the output end of the ejector 26 to sterilize the interior of the soft water tank 27 and the resin medium.

[0048] Optionally, such as Figure 7 As shown, the water softener 20 may further include a brine tank 21 for storing saturated or preset concentration brine solutions. The brine tank 21 is connected to the input of the electrolysis device 25 via a pipeline to stably provide the necessary raw materials for the electrolysis process. Optionally, the output of the ejector 26 can be connected to the inlet of the water softener tank 27 via a distributor 24. The distributor 24 can evenly distribute the disinfectant solution to the cross-section or different height areas of the water softener tank 27, improving the disinfection coverage and efficiency, and avoiding local dead zones.

[0049] In one embodiment, such as Figure 3 As shown, step S100 may include steps S110 to S130.

[0050] In this embodiment, step S110 involves obtaining the output flow rate of the electrolyte in the electrolysis device.

[0051] In this embodiment, step S120 involves determining the current concentration of the bactericidal solution output by the ejector 26 based on the obtained output flow rate of the electrolyte. The output flow rate of the electrolyte in the electrolysis device is positively correlated with the current concentration of the bactericidal solution output by the ejector.

[0052] In this embodiment, step S130 is to determine the current concentration of the bactericidal solution output by the ejector as the current concentration of the bactericidal solution output by the bactericidal module.

[0053] The positive correlation between the electrolyte output flow rate of the electrolysis device 25 and the current concentration of the bactericidal solution output by the ejector 26 can be understood as follows: an increase in the electrolyte output flow rate directly leads to an increase in the proportion of chlorine-containing components in the mixed bactericidal solution, i.e., an increase in concentration. Conversely, a decrease in the electrolyte output flow rate directly leads to a decrease in the proportion of chlorine-containing components in the mixed bactericidal solution, i.e., a decrease in concentration.

[0054] The output flow rate of the electrolyte in the electrolysis device 25 can be obtained in several ways. First, a direct method is to install a flow detection device 23 at the outlet or inlet of the electrolysis device 25 for direct measurement. Second, an indirect calculation is performed based on the operating parameters of the metering pump driving the electrolyte delivery, including but not limited to operating time, pulse frequency, or duty cycle, combined with its calibrated flow curve to estimate the actual flow rate. Third, the input flow rate of the electrolysis device 25 can be determined based on the operating current of the pump at the input end of the electrolysis device 25, allowing for indirect prediction of the trend in the input flow rate.

[0055] Specifically, based on the obtained electrolyte output flow rate, the current concentration of the bactericide output by the ejector 26 is determined. On one hand, the rate of change of the current concentration of the bactericide can be derived from the rate of change of the electrolyte output flow rate; on the other hand, before the equipment leaves the factory or during the initial operation, the stable concentration of the bactericide output by the ejector 26 under different electrolyte flow rates can be calibrated experimentally, and a mapping relationship table or fitting curve between electrolyte flow rate and bactericide concentration can be established. In actual operation, the corresponding current concentration value can be obtained directly from the measured electrolyte flow rate.

[0056] It is important to note that the disinfectant output by ejector 26 can be understood as the disinfectant output by the disinfection module in the above embodiment. In this structure, the core function of the disinfection module is to generate and output a disinfectant containing effective disinfecting components (such as sodium hypochlorite), and ejector 26, as a key component, is responsible for mixing the electrolyte with the dilution water source. Therefore, the output of ejector 26 represents the disinfectant ultimately delivered to the soft water tank 27 by the entire disinfection module, and its concentration directly determines the strength and reliability of the disinfection effect.

[0057] It is understandable that the output flow rate of the electrolyte will fluctuate continuously due to various factors, such as blockage at the output or input end of the electrolysis device 25, aging of the metering pump, drift of the drive signal, changes in pipeline resistance, or blockage. These fluctuations directly alter the flow rate of the electrolyte injected into the ejector 26 per unit time, leading to a deviation of the concentration of the mixed bactericidal solution from the expected value. Therefore, in this embodiment, the output flow rate of the electrolyte is acquired in real time, and the current concentration of the bactericidal solution output by the ejector 26 is dynamically calculated based on this flow rate. Then, in step S200, the calculated current concentration is compared with the preset target concentration. Based on the direction and value of the deviation, the input voltage to the sterilization module is adjusted accordingly to achieve closed-loop feedback control of the bactericidal solution concentration, thereby improving sterilization reliability.

[0058] It should be noted that, based on this embodiment, the adjustment of the input voltage of the sterilization module in step S200 specifically involves adjusting the input voltage of the electrolysis device 25. Since the core functional unit of the sterilization module is the electrolysis device 25, which can be a residual chlorine generator, the object of electrical control adjustment for the entire sterilization module is the voltage applied across the electrolysis device 25. This voltage directly determines the magnitude of the electrolysis current and the intensity of the electrolysis reaction.

[0059] In one embodiment, such as Figure 4 As shown, step S111 is included before step S130.

[0060] In this embodiment, step S111 involves obtaining the operating current of the electrolysis device.

[0061] Based on step S111, step S130 can be specifically implemented in the form of step S131.

[0062] Step S131: Based on the acquired operating current and output flow rate, determine the current concentration of the bactericidal solution output by the ejector. The output flow rate of the electrolyte in the electrolysis device is positively correlated with the current concentration of the bactericidal solution output by the ejector, and the operating current of the electrolysis device is positively correlated with the current concentration of the bactericidal solution output by the ejector.

[0063] like Figure 7 As shown, the operating current of the electrolysis device 25 can be obtained using a current detection device 22, which can be an ampere detector capable of measuring the operating current during the electrolysis reaction. Alternatively, an isolated current transformer or an operational amplifier-based current sampling circuit can be used to obtain the operating current of the electrolysis device 25. The operating current of the electrolysis device 25 reflects the dynamic intensity of the electrolysis reaction; when the load in the electrolysis chamber increases, the operating current of the electrolysis device 25 increases; conversely, when the load decreases, the operating current of the electrolysis device 25 decreases. Load changes can occur in two ways: changes in brine flow rate and changes in brine concentration.

[0064] It is important to note that simply obtaining the output flow rate of the electrolyte can only provide some feedback on the current concentration of the bactericide solution, as the concentration is affected not only by the flow rate but also by the brine concentration. However, the concentration of the brine connected to the electrolysis device 25 is constantly changing, which also affects the final output concentration of the bactericide solution. Therefore, this embodiment also determines the flow rate of the connected brine by obtaining the operating current. Since the output flow rate of the electrolyte and the operating current of the electrolysis device 25 are obtained, the brine flow rate can be determined based on the electrolyte output flow rate, as the two can be approximately equal when the electrolysis chamber is nearly fully loaded with brine. Subsequently, since the brine flow rate is known, the required operating current corresponding to the brine flow rate can be quantified, thereby obtaining the operating current based on the brine concentration. For ease of understanding, exemplarily, the brine flow rate is Q. Using the known value of Q, the portion of the operating current of the electrolysis device 25 determined by the brine flow rate (i.e., I_Q) can be calculated, thus separating the portion I_C determined only by the brine concentration from the operating current I, i.e., I_C = I - I_Q. Therefore, the working current I_C directly characterizes the salt concentration C.

[0065] Understandably, obtaining only the operating current without acquiring the electrolyte output flow rate makes it impossible to distinguish whether the current change is caused by fluctuations in the brine flow rate or changes in the brine concentration. Since these two factors have a coupled effect on the electrolytic current, the lack of information on the electrolyte output flow rate will prevent the accurate separation of the true changes in brine concentration, leading to a significant deviation in the bactericidal solution concentration calculated based on the current, thus affecting the accuracy and reliability of sterilization control. It is important to note that the mechanisms by which brine concentration and electrolyte output flow rate affect the final bactericidal solution concentration are different and cannot be substituted for one another. Acquiring both parameters simultaneously, compared to knowing only one to determine the bactericidal solution flow rate output by the ejector 26, allows for a more accurate calculation of the bactericidal solution concentration output by the ejector 26.

[0066] It is important to note that, under the action of the ejector 26, the flow rate changes of the incoming tap water or soft water caused by water pressure fluctuations can be considered essentially constant. The mixing ratio of the ejector 26 is mainly determined by its structural dimensions and is not sensitive to changes in inlet water pressure. Therefore, in practical applications, the impact of fluctuations in the incoming water flow rate on the final disinfectant concentration is negligible. Based on this, the disinfectant concentration output by the ejector 26 can be calculated using a pre-stored disinfectant concentration calculation model, simply by combining the output flow rate of the electrolyte and the operating current of the electrolysis device 25.

[0067] In one embodiment, such as Figure 5 and Figure 7 As shown, a flow detection device 23 is provided upstream or downstream of the electrolysis device 25, and step S110 may include steps S112 and S113.

[0068] In this embodiment, step S112 involves acquiring the detection signal from the flow detection device.

[0069] In this embodiment, step S113 involves determining the output flow rate of the electrolyte in the electrolysis device based on the detection signal from the flow detection device.

[0070] The flow detection device 23 is located in the passage between the electrolysis device 25 and the ejector 26, and / or, the flow detection device 23 is located at the input end of the electrolysis device 25, and / or, the flow detection device 23 is located at the output end of the ejector 26. In this embodiment, the flow detection device 23 is located at the output end of the ejector 26; when the water softener 20 is equipped with a water distributor 24, the flow detection device 23 is located between the water distributor 24 and the ejector 26. It is understood that placing the flow detection device 23 in this position can effectively avoid its direct contact with high-concentration electrolyte (such as sodium hypochlorite solution), thereby reducing the risk of corrosion or scaling and extending the service life of the sensor. It should be noted that, due to the action of the ejector 26, the flow rate of tap water or softened water can remain basically constant under different water supply pressures. Therefore, the flow fluctuation measured at this position can effectively characterize the trend of electrolyte flow rate change. Moreover, since this position is located on the main channel between the outlet of the jet injector 26 and the water distributor 24, it can be continuously flushed by the high-speed flowing mixture, so it is not easy for electrolytic byproducts such as calcium and magnesium precipitates, biofilms or hypochlorite crystals to adhere and deposit, thus avoiding scaling or clogging on the sensor surface and ensuring the stability and measurement accuracy of the flow detection device 23.

[0071] The acquisition of the detection signal from the flow detection device 23 refers to the process of receiving the original electrical signal from the flow detection device 23, which can be implemented using an analog signal acquisition circuit or a digital communication interface. Determining the output flow rate of the electrolyte in the electrolysis device 25 based on the detection signal from the flow detection device 23 refers to the calculation process of converting the original signal into a flow rate value, which can be implemented using a lookup table method, linear interpolation, or a calibration algorithm.

[0072] In one embodiment, such as Figure 6 As shown, the water softener control method also includes steps S310 and S320.

[0073] In this embodiment, step S310 involves controlling the electrolysis device to stop electrolysis when the output flow rate of the electrolyte in the electrolysis device is less than a preset value.

[0074] In this embodiment, step S320 involves controlling the electrolysis device to perform electrolysis when the output flow rate of the electrolyte in the electrolysis device is not less than a preset value.

[0075] The preset value can be understood as a pre-set flow threshold, which can be set based on the rated operating parameters or historical operating data of the water softener 20. Its specific value is not limited here, but its purpose is to distinguish between normal flow and abnormally low flow states. Controlling the electrolysis device 25 to stop or begin electrolysis is achieved by cutting off or connecting its power supply circuit, for example, using a solid-state relay or a thyristor switch. Alternatively, it can be achieved by adjusting the input voltage to the electrolysis device 25 to control the input voltage to 0. The specific method used to stop electrolysis is not limited here.

[0076] It is important to note that this embodiment utilizes a flow threshold-based protection mechanism to enhance the safety and reliability of the sterilization module in the water softener 20. First, a preset value is set, such as 2 mL / min. During operation, if the output flow rate of the electrolyte is detected to be lower than this preset value, it is considered an abnormal condition. Possible causes include: insufficient water in the brine tank 21, blockage of the inlet filter or electrolysis chamber, metering pump malfunction, pipeline leakage, or salt crystal blockage. Continuing electrolysis under such low flow conditions will lead to localized overheating of the electrolysis cell, electrode dry burning, excessively high sodium hypochlorite concentration, and even the production of harmful byproducts. This will not only accelerate the aging of the electrolysis device 25 but may also damage the resin or contaminate the water. Therefore, when the flow rate is below the threshold, the electrolysis device 25 is stopped to achieve low flow protection. When the flow rate is not less than the preset value, electrolysis is initiated. This ensures the reliability and safety of the sterilization mode.

[0077] In one embodiment, such as Figure 8 As shown, the electrolysis device 25 is equipped with an electrode assembly 28. Step S300 may include step S320. Step S320: Based on the current concentration of the bactericidal solution, adjust the input voltage of the electrode assembly in the electrolysis device so that the current concentration of the bactericidal solution approaches the target concentration. The input voltage of the electrode assembly is positively correlated with the current concentration of the bactericidal solution output by the bactericidal module.

[0078] The electrolysis device 25 contains an electrode assembly 28, which includes a pair of opposing electrode plates, serving as a positive electrode plate 281 and a negative electrode plate 282, typically made of a corrosion-resistant and highly conductive material. When energized, the positive electrode plate 281 undergoes an oxidation reaction, converting chloride ions in the brine into hypochlorite or hypochlorous acid, both of which have strong oxidizing properties. Meanwhile, the negative electrode plate 282 undergoes a reduction reaction, generating hydrogen gas and hydroxide ions, thus jointly achieving the electrolytic chlorine-producing sterilization function.

[0079] Based on this structure, the system dynamically adjusts the input voltage applied to the electrode assembly 28 according to the real-time acquired current concentration of the disinfectant solution, so that the concentration of the disinfectant solution approaches the preset target concentration. Since the input voltage is positively correlated with the electrolysis reaction rate—that is, as the voltage increases, the potential difference between the electrodes increases, ion migration and electron transfer accelerate, more effective chlorine is generated per unit time, and the concentration of the disinfectant solution increases accordingly; conversely, it decreases. Therefore, by adjusting the input voltage, the final output concentration of the disinfectant solution can be controlled.

[0080] In one embodiment, the electrolysis device 25 is provided with a plurality of electrode assemblies 28, each electrode assembly 28 including a positive electrode plate 281 and a negative electrode plate 282 disposed in the electrolysis device 25; the plurality of electrode assemblies 28 are connected in series, wherein the negative electrode plate 282 of the preceding electrode assembly 28 is electrically connected to the positive electrode plate 281 of the following electrode assembly 28, the positive electrode plate 281 of the preceding electrode assembly 28 is the positive terminal of the series connection of the plurality of electrode assemblies 28, and the negative electrode plate 282 of the following electrode assembly 28 is the negative terminal of the series connection of the plurality of electrode assemblies 28.

[0081] Step S300 may include step S330. Step S330: Based on the current concentration of the sterilizing solution, adjust the input voltage to the series positive and series negative terminals of the electrolysis device so that the current concentration of the sterilizing solution approaches the target concentration. The input voltage to the series positive and series negative terminals is positively correlated with the current concentration of the sterilizing solution output by the sterilization module.

[0082] like Figure 8 As shown, the electrolysis device 25 can be constructed as a shell structure, which integrates multiple electrode assemblies 28. Each electrode assembly 28 includes a pair of electrode plates, namely a positive electrode plate 281 and a negative electrode plate 282, which are arranged at intervals relative to each other along the radial direction of the shell to form an effective electrolysis reaction zone. Multiple such electrode assemblies 28 are arranged at intervals along the length of the shell to form a multi-stage electrolysis unit. This layout not only makes full use of the internal space of the shell, but also extends the residence time of the fluid in the electrolysis chamber, thereby improving the electrolysis efficiency.

[0083] Specifically, these electrode assemblies 28 can be connected in series: the negative electrode 282 of the preceding electrode assembly 28 is connected to the positive electrode 281 of the following stage, and so on, with the total input voltage applied only at the beginning and end. This multi-pair series design can control the current of the entire circuit at a low level. Taking two electrode assemblies in series as an example, the current of the entire circuit can be controlled at a relatively low level, reducing the current by half compared to a single pair of electrodes, thus lowering the requirements for the power supply and control system. Figure 8 As shown, two electrode assemblies 28 are connected in series, where, Figure 8The negative electrode 282 of the left electrode assembly 28 is connected to the positive electrode 281 of the right electrode assembly 28 via wire A, while the positive electrode 281 of the left electrode assembly 28 and the negative electrode 282 of the right electrode assembly 28 are used to connect to a power source.

[0084] It should be noted that the series design of multiple electrode pairs 300 can control the current of the entire circuit at a low level. Taking two electrode pairs 300 in series as an example, the current of the entire circuit can be controlled at a relatively low level, which can reduce the current by half compared to a single pair of electrodes, and lower the requirements for the power supply and control system.

[0085] Secondly, this application also provides a control device 10, which is configured to implement the water softener control method described above. It should be noted that the specific implementation of this water softener control method refers to the above embodiments. Since this control device 10 adopts all the technical solutions of all the above embodiments, it also has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0086] Thirdly, this application also provides a water softener 20, in one embodiment, such as Figure 7 As shown, the water softener 20 includes a sterilization module, a water softener tank 27, and a control device 10.

[0087] It should be noted that the specific implementation of the control device 10 refers to the above embodiments. Since the water softener 20 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0088] In this embodiment, the sterilization module is used to electrolyze and generate sterilization solution and output it; the output end of the sterilization module is connected to the soft water tank 27 to output sterilization solution to the soft water tank 27.

[0089] Optionally, the sterilization module can simultaneously accept saline solution and tap water or soft water. The saline solution first enters the electrolysis chamber of the sterilization module, where an electrolytic reaction occurs under the input voltage. An oxidation reaction occurs at the anode, converting chloride ions into hypochlorite or hypochlorous acid, while hydrogen and hydroxide ions are generated at the cathode, ultimately producing a high-concentration electrolyte rich in effective sterilizing components such as sodium hypochlorite. Subsequently, this electrolyte is mixed and diluted with the supplied tap water or soft water in a certain proportion to form a chlorine-containing sterilizing solution with a concentration close to the target and strong oxidizing properties. The sterilization module can be connected to a soft water tank 27 via a pipe to output the sterilizing solution to the soft water tank 27.

[0090] Optionally, the water softener tank 27 can be a resin tank filled with sodium-type cation exchange resin, which adsorbs calcium and magnesium ions in the raw water and releases sodium ions during the softening stage, thereby reducing water hardness. During the sterilization stage, the resin tank receives sterilizing solution from the sterilization module to kill bacteria, biofilms, and other microbial contaminants adhering to the resin surface and the inner wall of the tank. After the sterilization module completes the injection of sterilizing solution and ensures sufficient contact, the water softener tank 27 has an outlet to discharge waste liquid containing residual sterilizing components and impurities.

[0091] The control device 10 enhances the sterilization effect of the sterilization module on the resin tank, thereby improving sterilization reliability. Specifically, the control device 10 acquires the current concentration of the sterilizing solution from the sterilization module and adjusts the input voltage to bring the current concentration closer to the target concentration. This enables real-time detection and dynamic adjustment of the sterilizing solution concentration, ensuring that the current concentration of the sterilizing solution remains stable within the target concentration range. This prevents fluctuations in the output concentration of the sterilizing solution from affecting the sterilization effect, thus improving sterilization reliability.

[0092] The operating current of the electrolysis unit 25 can be obtained using a current detection device 22, which can be an ampere detector capable of measuring the operating current during the electrolysis reaction. Alternatively, an isolated current transformer or an operational amplifier-based current sampling circuit can be used to obtain the operating current of the electrolysis unit 25. The operating current of the electrolysis unit 25 reflects the dynamic intensity of the electrolysis reaction; as the load within the electrolysis chamber increases, the operating current of the electrolysis unit 25 increases; conversely, as the load decreases, the operating current decreases. Load changes can occur in two ways: changes in brine flow rate and changes in brine concentration.

[0093] In one embodiment, such as Figure 7 As shown, the sterilization module includes an electrolysis device 25 and an ejector 26. The electrolysis device 25 is used to electrolyze and generate an electrolyte. The two input terminals of the ejector 26 are connected one-to-one to the water source and the output terminal of the electrolysis device 25. The output terminal of the ejector 26 is connected to the soft water tank 27 to output the sterilization solution produced by mixing the water source and the electrolyte to the soft water tank 27.

[0094] Optionally, the electrolysis device 25 is a residual chlorine generator. The residual chlorine generator is used to introduce brine and, under the action of an electric field, converts chloride ions into components such as sodium hypochlorite with bactericidal activity, generating a high-concentration electrolyte, namely a hypochlorous acid solution. This high-concentration electrolyte is then transported to one input end of the ejector 26, while the other input end of the ejector 26 is connected to a water source (such as tap water or softened water). Using the ejector 26, when the water source flows at high speed through the throat of the ejector 26, a negative pressure is formed on the side wall, thereby automatically drawing in the electrolyte and achieving full mixing of the two in the mixing chamber, forming a bactericidal solution with a lower concentration than the high-concentration electrolyte. Finally, this bactericidal solution is directly injected into the soft water tank 27 from the output end of the ejector 26 to sterilize the interior of the soft water tank 27 and the resin medium.

[0095] Optionally, the water softener 20 may further include a brine tank 21 for storing saturated or preset concentration brine solutions. The brine tank 21 is connected to the input of the electrolysis device 25 via a pipeline to stably provide the necessary raw materials for the electrolysis process. Optionally, the output of the jet injector 26 may be connected to the inlet of the water softener tank 27 via a water distributor 24. The water distributor 24 can evenly distribute the disinfectant solution to the cross-section or different height areas of the water softener tank 27, improving the disinfection coverage and efficiency, and avoiding local dead zones.

[0096] In one embodiment, such as Figure 7 As shown, the water softener 20 also includes a flow detection device 23, which is located in the passage between the electrolysis device 25 and the ejector 26, and / or, the flow detection device 23 is located at the input end of the electrolysis device 25, and / or, the flow detection device 23 is located at the output end of the ejector 26.

[0097] In this embodiment, the flow detection device 23 is located at the output end of the ejector 26; when the water softener 20 is equipped with a water distributor 24, the flow detection device 23 is located between the water distributor 24 and the ejector 26. It is understood that placing the flow detection device 23 at this location effectively avoids direct contact with high-concentration electrolytes (such as sodium hypochlorite solution), thereby reducing the risk of corrosion or scaling and extending the sensor's service life. It should be noted that, under the action of the ejector 26, the flow rate of tap water or softened water remains essentially constant under different water supply pressures. Therefore, the flow fluctuation measured at this location can effectively characterize the trend of electrolyte flow changes. Moreover, since this location is on the main channel between the ejector 26 outlet and the water distributor 24, it is continuously flushed by the high-speed flowing mixture, thus preventing the adhesion and deposition of electrolysis byproducts such as calcium and magnesium precipitates, biofilms, or hypochlorite crystals, avoiding scaling or clogging on the sensor surface, and ensuring the stability and measurement accuracy of the flow detection device 23.

[0098] In one embodiment, such as Figure 8As shown, the electrolysis device 25 is provided with a plurality of electrode assemblies 28. Each electrode assembly 28 includes a positive electrode plate 281 and a negative electrode plate 282 disposed in the electrolysis device 25. The plurality of electrode assemblies 28 are connected in series in sequence. The negative electrode plate 282 of the preceding electrode assembly 28 is electrically connected to the positive electrode plate 281 of the following electrode assembly 28. The positive electrode plate 281 of the preceding electrode assembly 28 is the positive terminal of the series connection of the plurality of electrode assemblies 28, and the negative electrode plate 282 of the following electrode assembly 28 is the negative terminal of the series connection of the plurality of electrode assemblies 28.

[0099] The electrode assembly 28 includes a pair of opposing electrode plates, serving as a positive electrode plate 281 and a negative electrode plate 282, typically made of a corrosion-resistant and highly conductive material. When energized, the positive electrode plate 281 undergoes an oxidation reaction, converting chloride ions in the brine into hypochlorite or hypochlorous acid, both of which have strong oxidizing properties. Meanwhile, the negative electrode plate 282 undergoes a reduction reaction, generating hydrogen gas and hydroxide ions, thus jointly achieving the electrolytic chlorine-generating sterilization function.

[0100] The electrolysis device 25 can be constructed as a shell structure, which integrates multiple electrode assemblies 28. Each electrode assembly 28 includes a pair of electrode plates, namely a positive electrode plate 281 and a negative electrode plate 282, which are arranged at intervals relative to each other along the radial direction of the shell to form an effective electrolysis reaction zone. Multiple such electrode assemblies 28 are arranged at intervals along the length of the shell to form a multi-stage electrolysis unit. This layout not only makes full use of the internal space of the shell, but also extends the residence time of the fluid in the electrolysis chamber, thereby improving the electrolysis efficiency.

[0101] Specifically, these electrode assemblies 28 can be connected in series: that is, the negative electrode plate 282 of the previous stage electrode assembly 28 is connected to the positive electrode plate 281 of the next stage, and so on, with the total input voltage applied only at the beginning and end. Figure 8 As shown, two electrode assemblies 28 are connected in series, where, Figure 8 The negative electrode 282 of the left electrode assembly 28 is connected to the positive electrode 281 of the right electrode assembly 28 via wire A, while the positive electrode 281 of the left electrode assembly 28 and the negative electrode 282 of the right electrode assembly 28 are used to connect to a power source.

[0102] It should be noted that the series design of multiple electrode assemblies 300 can keep the current of the entire circuit at a low level. Taking two electrode assemblies 300 in series as an example, the current of the entire circuit can be kept at a relatively low level. Compared with a single pair of electrodes, the current can be reduced by half, and the requirements for the power supply and control system are lower.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no technical conflict, the various technical features mentioned in the various embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A water softener control method, characterized in that, The water softener includes a sterilization module and a water softener tank. The sterilization module is used to electrolyze and generate sterilization solution and output it. The output end of the sterilization module is connected to the water softener tank to output sterilization solution to the water softener tank for sterilization. The water softener control method includes: Obtain the current concentration of the disinfectant solution output by the disinfection module; Based on the current concentration of the bactericidal solution, the input voltage to the bactericidal module is adjusted so that the current concentration of the bactericidal solution approaches the target concentration. The input voltage to the bactericidal module is positively correlated with the current concentration of the bactericidal solution output by the bactericidal module.

2. The water softener control method as described in claim 1, characterized in that, The sterilization module includes an electrolysis device and an ejector. The electrolysis device is used to electrolyze and generate an electrolyte. The two input terminals of the ejector are connected one-to-one to a water source and the output terminal of the electrolysis device. The output terminal of the ejector is connected to the soft water tank to output the sterilization solution produced by mixing the water source and the electrolyte to the soft water tank. The current concentration of the sterilizing solution output by the sterilization module includes: Obtain the output flow rate of the electrolyte in the electrolysis device; Based on the obtained output flow rate of the electrolyte, the current concentration of the bactericide output by the ejector is determined. The output flow rate of the electrolyte in the electrolysis device is positively correlated with the current concentration of the bactericide output by the ejector. The current concentration of the bactericidal solution output by the ejector is determined as the current concentration of the bactericidal solution output by the bactericidal module.

3. The water softener control method as described in claim 2, characterized in that, Before determining the current concentration of the bactericidal solution output by the ejector based on the acquired electrolyte output flow rate, the process includes: Obtain the operating current of the electrolysis unit; The step of determining the current concentration of the bactericide output by the ejector based on the obtained electrolyte output flow rate, wherein the positive correlation between the electrolyte output flow rate of the electrolysis device and the current concentration of the bactericide output by the ejector includes: Based on the acquired operating current and output flow rate, the current concentration of the bactericidal solution output by the ejector is determined. The output flow rate of the electrolyte in the electrolysis device is positively correlated with the current concentration of the bactericidal solution output by the ejector, and the operating current of the electrolysis device is positively correlated with the current concentration of the bactericidal solution output by the ejector.

4. The water softener control method as described in claim 2, characterized in that, A flow detection device is installed upstream or downstream of the electrolysis device, and the process of obtaining the output flow rate of the electrolyte in the electrolysis device includes: Acquire the detection signal from the flow detection device; The output flow rate of the electrolyte in the electrolysis device is determined based on the detection signal from the flow detection device.

5. The water softener control method according to any one of claims 2 to 4, characterized in that, The water softener control method also includes: If the output flow rate of the electrolyte in the electrolysis device is less than the preset value, the electrolysis device shall be stopped. When the output flow rate of the electrolyte in the electrolysis device is not less than the preset value, the electrolysis device is controlled to perform electrolysis.

6. The water softener control method according to any one of claims 2 to 4, characterized in that, The electrolysis device is equipped with an electrode assembly. The step of adjusting the input voltage to the sterilization module based on the current concentration of the sterilizing solution to make the current concentration of the sterilizing solution approach the target concentration, wherein the input voltage to the sterilization module is positively correlated with the current concentration of the sterilizing solution output by the sterilization module, includes: Based on the current concentration of the bactericidal solution, the input voltage of the electrode assembly in the electrolysis device is adjusted so that the current concentration of the bactericidal solution approaches the target concentration. The input voltage of the electrode assembly is positively correlated with the current concentration of the bactericidal solution output by the bactericidal module.

7. The water softener control method as described in claim 6, characterized in that, The electrolysis device is provided with a plurality of electrode assemblies, each electrode assembly including a positive electrode plate and a negative electrode plate disposed in the electrolysis device; the plurality of electrode assemblies are connected in series in sequence, wherein the negative electrode plate of the preceding electrode assembly is electrically connected to the positive electrode plate of the following electrode assembly, the positive electrode plate of the front electrode assembly is the positive terminal of the series connection of the plurality of electrode assemblies, and the negative electrode plate of the rear electrode assembly is the negative terminal of the series connection of the plurality of electrode assemblies; The step of adjusting the input voltage of the electrode assembly in the electrolysis device based on the current concentration of the bactericidal solution to make the current concentration of the bactericidal solution approach the target concentration, wherein the input voltage of the electrode assembly is positively correlated with the current concentration of the bactericidal solution output by the bactericidal module, includes: Based on the current concentration of the sterilizing solution, the input voltage to the series positive and negative terminals of the electrolysis device is adjusted so that the current concentration of the sterilizing solution approaches the target concentration. The input voltage to the series positive and negative terminals is positively correlated with the current concentration of the sterilizing solution output by the sterilization module.

8. A control device, characterized in that, The control device is configured to implement the water softener control method as described in any one of claims 1 to 7.

9. A water softener, characterized in that, The water softener includes: A sterilization module, which is used to electrolyze and generate a sterilization solution and output it; A water softener tank, wherein the output of the sterilization module is connected to the water softener tank for outputting sterilization solution to the water softener tank; and The control device as described in claim 8.

10. The water softener as described in claim 9, characterized in that, The sterilization module includes an electrolysis device and an ejector. The electrolysis device is used to electrolyze and generate an electrolyte. The two input terminals of the ejector are connected one-to-one to the water source and the output terminal of the electrolysis device. The output terminal of the ejector is connected to the soft water tank to output the sterilization solution produced by mixing the water source and the electrolyte to the soft water tank.

11. The water softener as described in claim 10, characterized in that, The water softener also includes a flow detection device, which is located in the passage between the electrolysis device and the ejector, and / or, the flow detection device is located at the input end of the electrolysis device, and / or, the flow detection device is located at the output end of the ejector.

12. The water softener as described in claim 10, characterized in that, The electrolysis device is provided with multiple electrode assemblies. Each electrode assembly includes a positive electrode plate and a negative electrode plate disposed within the electrolysis device. The multiple electrode assemblies are connected in series in sequence. The negative electrode plate of the preceding electrode assembly is electrically connected to the positive electrode plate of the following electrode assembly. The positive electrode plate of the front electrode assembly is the positive terminal of the series connection of multiple electrode assemblies, and the negative electrode plate of the rear electrode assembly is the negative terminal of the series connection of multiple electrode assemblies.

13. The water softener as described in any one of claims 10 to 12, characterized in that, The electrolysis device is a residual chlorine generator.

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