Control method of water softener and water softener

Abstract

The invention relates to the technical field of water purification equipment, particularly provides a control method of a water softener and the water softener, and aims to solve the problem that regeneration is insufficient or water resources are wasted due to the fact that the water supplementing amount is difficult to accurately control in the resin regeneration process of an existing water softener. In order to achieve the purpose, the water softener comprises resin and a salt box, and the control method of the water softener comprises the steps that when a regeneration mode needs to be executed, parameters of the resin are obtained; according to the parameters of the resin, the theoretical water volume needed by the regeneration mode is obtained; and water is supplemented into the salt box, so that the water amount in the salt box reaches the theoretical water amount. By means of the arrangement, the water supplementing amount in the regeneration process can be adaptively adjusted according to the actual state of the resin, accurate control over the salt water amount is achieved, and waste of water and salt is avoided while sufficient regeneration of the resin is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of water purification equipment technology, specifically providing a control method for a water softener and a water softener. Background Technology

[0002] With technological advancements and increased public awareness of water health, water purification equipment has experienced rapid development and widespread adoption. By installing multiple filter cartridges within these devices, tap water can undergo multiple treatments and purification processes, meeting diverse user needs.

[0003] Water softeners soften water, reducing limescale buildup in household water, improving washing performance, and benefiting human health. They work by using resin to exchange hardness ions such as calcium and magnesium from hard water, thus reducing hardness. Once the resin becomes saturated with hardness ions, brine is introduced to exchange these ions and restore the resin's regenerative activity.

[0004] However, existing water softeners have difficulty precisely controlling the amount of water added during the resin regeneration process, resulting in insufficient regeneration or waste of water resources.

[0005] Accordingly, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0006] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that existing water softeners have difficulty in accurately controlling the amount of water replenished during the resin regeneration process, resulting in insufficient regeneration or waste of water resources.

[0007] In a first aspect, the present invention provides a control method for a water softener, the water softener comprising resin and a brine tank, the control method comprising: when a regeneration mode needs to be executed, acquiring parameters of the resin; acquiring the theoretical water volume required for the regeneration mode based on the parameters of the resin; and replenishing water to the brine tank so that the water volume in the brine tank reaches the theoretical water volume.

[0008] In the preferred embodiment of the above control method, the step of "obtaining the parameters of the resin" specifically includes: obtaining the capacity parameters and / or the activity parameters of the resin; the step of "obtaining the theoretical water volume required for the regeneration mode based on the parameters of the resin" specifically includes: obtaining the theoretical water volume required for the regeneration mode based on the capacity parameters and / or the activity parameters.

[0009] In a preferred embodiment of the above control method, the step of "obtaining the activity parameters of the resin" specifically includes: obtaining the color depth of the resin and / or the uniformity of the resin arrangement; and obtaining the activity parameters of the resin based on the color depth and / or the uniformity of the arrangement.

[0010] In the preferred embodiment of the above control method, the step of "obtaining the theoretical water volume required for the regeneration mode according to the capacity parameter and / or the activity parameter" specifically includes: calculating the theoretical water volume according to the formula L=[L1×M×X] / M1; where L represents the theoretical water volume, L1 represents the capacity parameter, M represents the theoretical salt consumption required for complete regeneration of the resin per liter, M1 represents the theoretical dissolved salt per liter of water, and X represents the activity parameter.

[0011] In a preferred embodiment of the above control method, after the water volume in the salt tank reaches the theoretical water volume, the control method of the present invention further includes: obtaining the sodium ion concentration in the salt tank, denoted as the first concentration; and when the first concentration reaches a first preset concentration, introducing the brine in the salt tank into the resin for ion exchange.

[0012] In the preferred embodiment of the above control method, during the process of "introducing the brine in the salt tank into the resin for ion exchange", the control method of the present invention further includes: obtaining the sodium ion concentration of the brine discharged during the ion exchange process, denoted as the second concentration; and stopping the introduction of brine into the resin when the second concentration drops to a second preset concentration.

[0013] In a preferred embodiment of the above control method, before “introducing the brine in the salt tank into the resin for ion exchange”, the control method of the present invention further includes: backwashing the resin; and / or after the resin has completed ion exchange, the control method of the present invention further includes: forward washing the resin.

[0014] In a preferred embodiment of the above control method, during the forward washing process of the resin, the control method of the present invention further includes: obtaining the sodium ion concentration of the discharged brine during the forward washing process, denoted as the third concentration; and when the third concentration drops to a third preset concentration, ending the forward washing of the resin and executing the soft water mode.

[0015] In a preferred embodiment of the above control method, during the process of the water softener executing the water softening mode, the control method of the present invention further includes: obtaining the hardness value of the water before it enters the resin, and recording it as a first hardness value; obtaining the hardness value of the water after it flows out of the resin, and recording it as a second hardness value; and selectively executing the regeneration mode according to the first hardness value and the second hardness value.

[0016] In a second aspect, the present invention provides a water softener, the water softener including a controller configured to perform the control method described above.

[0017] When employing the above technical solution, the water softener of the present invention includes resin and a brine tank. The control method of the present invention includes: when a regeneration mode needs to be executed, acquiring the parameters of the resin; based on the resin parameters, acquiring the theoretical water volume required for the regeneration mode; and replenishing water to the brine tank to bring the water volume in the brine tank to the theoretical water volume. Through this setup, the theoretical water volume during the regeneration process can be determined based on the actual state of the resin, thereby formulating a corresponding water supply strategy and achieving precise control of water and brine volume. This ensures the regeneration effect of the resin while shortening the regeneration time and avoiding waste of water and brine.

[0018] Furthermore, the control method of the present invention further includes: obtaining the capacity parameters and / or activity parameters of the resin; the step of "obtaining the theoretical water volume required for the regeneration mode based on the resin parameters" specifically includes: obtaining the theoretical water volume required for the regeneration mode based on the capacity parameters and / or activity parameters. With this setup, the theoretical water volume can be obtained based on the two parameters that have the greatest impact on salt content and water volume, maximizing the accuracy of the theoretical water volume.

[0019] Furthermore, the control method of the present invention further includes: acquiring the color depth and / or the uniformity of resin arrangement; and acquiring the activity parameters of the resin based on the color depth and / or uniformity of arrangement. By setting it in this way, the amount of color change and / or the amount of change in uniformity of arrangement of the resin is correlated with the amount of change in the regeneration activity of the resin, so as to quantify the regeneration activity of the resin by acquiring the color depth and / or uniformity of arrangement, thereby accurately assessing the current regeneration activity of the resin.

[0020] Furthermore, the control method of the present invention also includes: calculating the theoretical water volume according to the formula L=[L1×M×X] / M1; where L represents the theoretical water volume, L1 represents the capacity parameter, M represents the theoretical salt consumption required for complete regeneration of each liter of resin, M1 represents the theoretical dissolved salt content per liter of water, and X represents the activity parameter. By rationally constructing a relationship model between influencing factors and theoretical water volume, multiple factors affecting water volume and salt content can be comprehensively analyzed, thereby improving the accuracy of theoretical water volume calculation.

[0021] Furthermore, after the water volume in the salt tank reaches the theoretical water volume, the control method of the present invention further includes: obtaining the sodium ion concentration in the salt tank, denoted as the first concentration; and when the first concentration reaches a first preset concentration, introducing the brine in the salt tank into the resin for ion exchange. By monitoring the concentration of the brine in the salt tank in real time, the progress of salt dissolution is controlled, so that the brine is promptly introduced into the resin for ion exchange after reaching saturation, thereby shortening the salt dissolution time and regeneration time.

[0022] Furthermore, in the process of "introducing brine from the salt tank into the resin for ion exchange," the control method of the present invention further includes: obtaining the sodium ion concentration of the brine discharged during the ion exchange process, denoted as the second concentration; and stopping the introduction of brine into the resin when the second concentration drops to a second preset concentration. With this setting, the sodium ion concentration of the brine after ion exchange with the resin can be detected in real time to monitor the regeneration progress of the resin, thereby enabling precise control of the regeneration process time.

[0023] Furthermore, before "introducing the brine from the salt tank into the resin for ion exchange," the control method of the present invention further includes: backwashing the resin; and / or after the resin has completed ion exchange, the control method of the present invention further includes: forward washing the resin. Backwashing the resin before the salt absorption process removes suspended solids and broken resin particles from the resin, loosening the resin layer and allowing the saturated brine to fully contact the resin particles, thereby improving ion exchange efficiency and regeneration effect. Forward washing the resin after the salt absorption process removes the brine remaining in the resin.

[0024] Furthermore, during the forward rinsing of the resin, the control method of the present invention further includes: obtaining the sodium ion concentration of the discharged brine during the forward rinsing process, denoted as the third concentration; and ending the forward rinsing of the resin and executing the soft water mode when the third concentration drops to a third preset concentration. With this setting, the sodium ion concentration in the water used to rinse the resin can be detected to monitor the discharge progress of residual brine from the resin, thereby achieving precise control of the forward rinsing time.

[0025] Furthermore, the control method of the present invention further includes: during the process of the water softener executing the softening mode, the control method of the present invention further includes: acquiring the hardness value of the water before it enters the resin, denoted as a first hardness value; acquiring the hardness value of the water after it flows out of the resin, denoted as a second hardness value; and selectively executing a regeneration mode based on the first hardness value and the second hardness value. With this setting, the softening performance and regeneration activity of the resin can be evaluated based on the decrease in water hardness, providing a basis for determining whether the resin needs regeneration.

[0026] Furthermore, the water softener provided by this invention, based on the aforementioned control method, possesses the technical effects of the aforementioned control method. Compared to the water softener before the improvement, the water softener of this invention can ensure that the resin can be fully regenerated while also accurately controlling the amount of water and salt used during the regeneration process, thereby improving regeneration efficiency, reducing regeneration time, and avoiding waste of water and salt. Attached Figure Description

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which: Figure 1This is a flowchart of the control method for the water softener of the present invention; Figure 2 This is a flowchart of an embodiment of the control method for the water softener of the present invention. Detailed Implementation

[0028] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the invention and are not intended to limit the scope of protection of the invention. Those skilled in the art can make adjustments as needed to adapt to specific applications.

[0029] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "front," "rear," etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0030] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] As pointed out in the background art, existing water softeners struggle to precisely control the water replenishment during resin regeneration, leading to incomplete regeneration or water waste. This invention provides a control method and a water softener for a water softener. When the water softener needs to execute a regeneration mode, it acquires the resin parameters; based on the resin parameters, it obtains the theoretical water volume required for the regeneration mode; and it replenishes water to the brine tank to reach the theoretical water volume. This allows the water replenishment during the regeneration process to be adaptively adjusted according to the actual state of the resin, achieving precise control of the brine volume. This ensures sufficient resin regeneration while avoiding water and salt waste.

[0032] Specifically, the water softener of the present invention includes a housing, on which a raw water inlet, a softened water inlet, and a drain outlet are provided. Inside the housing, a resin tank, a salt tank, and a control valve body are installed. The resin tank is filled with resin particles and includes an inlet and an outlet. The salt tank is used to store salt particles. The control valve body is simultaneously connected to the raw water inlet, the softened water inlet, the drain outlet, the inlet, the outlet, and the salt tank. Inside, a control valve and a control water circuit are provided, which can form multiple connection schemes.

[0033] For example, when the soft water mode is executed, the raw water inlet is connected to the inlet, and the outlet is connected to the soft water outlet, so that tap water flows into the resin tank through the raw water inlet and the inlet in sequence. After ion exchange with the resin particles in the resin tank, it flows out through the outlet and the soft water outlet in sequence to generate soft water for direct use by the user.

[0034] When the regeneration mode is executed, the raw water inlet is first connected to the brine tank to introduce tap water into the brine tank and dissolve it with the salt particles to form saturated brine. Then, the brine tank is connected to the inlet and the outlet is connected to the drain to introduce the saturated brine into the resin tank to undergo ion exchange with the resin particles. At the same time, the regenerated waste liquid is discharged from the drain.

[0035] Traditional regeneration methods typically employ fixed procedures and control parameters, such as injecting a fixed amount of water into a brine tank to prepare a quantitative amount of saturated brine, which is then used for resin regeneration.

[0036] However, in actual use, the resin's actual state (such as capacity, activity, or saturation) will change with usage time and influent water quality. Fixed regeneration parameters (such as brine volume) cannot adapt to different resin states, resulting in insufficient or excessive water replenishment. Insufficient brine will lead to incomplete regeneration and will also affect the water softening effect and the resin's lifespan; excessive brine will lead to excessive consumption of salt and water, resulting in waste.

[0037] Based on this, preferably, such as Figure 1 As shown, the control method provided by the present invention includes: S100: Obtain resin parameters when regeneration mode is required; S200: Based on the resin parameters, obtain the theoretical water volume required for the regeneration mode; S300: Add water to the brine tank to bring the water level in the brine tank to the theoretical level.

[0038] Since the salt tank contains a sufficient amount of salt granules to ensure complete dissolution in the water, and the solubility of sodium chloride in water is fixed at approximately 0.36 kg / L, the amount of salt dissolved and the amount of saturated brine generated can be controlled simply by controlling the amount of water entering the salt tank.

[0039] Regarding the control of theoretical water volume, this application obtains multiple parameters of the resin to evaluate its actual state, and then accurately calculates the water and salt consumption during the regeneration process based on the actual state of the resin. This allows for the formulation of corresponding water supply strategies, achieving precise control of water and salt volume, ensuring the regeneration effect of the resin, shortening the regeneration time, and avoiding waste of water and salt.

[0040] Preferably, the step of "obtaining the parameters of the resin" specifically includes: S110: Obtain the capacity parameters and / or activity parameters of the resin; The steps of "obtaining the theoretical water volume required for the regeneration mode based on the resin parameters" specifically include: S210: Obtain the theoretical water volume required for the regeneration mode based on capacity parameters and / or activity parameters.

[0041] First, the resin capacity directly affects the amount of water and salt used in its regeneration process. Existing water softeners have resin capacities ranging from a few liters to hundreds of liters, resulting in significant differences in the amount of water and salt used during their regeneration process.

[0042] Preferably, the resin capacity parameters can be stored in the water softener's memory for the controller to access at any time.

[0043] Secondly, as the amount of softened water increases, hardness ions in the water are continuously exchanged into the resin, causing the resin to tend towards saturation and its ion exchange capacity to gradually weaken. Therefore, the ion exchange capacity (i.e., softening capacity) of the resin is evaluated through an activity parameter. Preferably, in this application, the activity parameter is set as the ratio of the resin's current ion exchange capacity to its initial ion exchange capacity, denoted by X. For example, when the resin has just completed regeneration, its activity parameter can be set to 1. After a period of use, as the activity decreases, the activity parameter can be set between 0 and 1, such as 50% or 30%. When the resin completely loses its exchange capacity, the activity parameter can be set to 0.

[0044] This application quantifies the actual capacity of the resin and its active state during regeneration, and optimizes the weighting of the two parameters to accurately obtain the theoretical water volume.

[0045] Regarding the acquisition of activity parameters, this application evaluates the regeneration activity of the resin by detecting changes in the physical morphology of the resin during the softening cycle. The ion exchange capacity of the resin at different softening stages is correlated with its physical morphology at that time, thereby enabling the quantification and evaluation of the resin activity through different physical morphologies, and obtaining specific activity parameters.

[0046] Preferably, such as Figure 2 As shown, the steps for "obtaining the activity parameters of the resin" specifically include: S111: Obtain the color depth and / or uniformity of the resin; S112: Obtain the activity parameters of the resin based on color depth and / or uniformity of arrangement.

[0047] Specifically, during its softening cycle, as the amount of water produced and the saturation increase, the color of the resin will change from light to dark. Some resin particles will also gradually shrink due to wear and chemical degradation, resulting in increasingly obvious irregularities in the overall structure.

[0048] Therefore, in practical applications, the color depth and uniformity of the resin can be graded. This application preferably divides them into three grades, and different color grades and uniformity grades are associated with different activity parameters. The corresponding activity parameters can be obtained by identifying the color depth and uniformity.

[0049] Color depth and uniformity of arrangement can both be obtained through high-definition vision equipment and compared with the preset color depth and uniformity of arrangement tables in the controller to obtain accurate color depth and uniformity of arrangement.

[0050] It should be noted that the activity parameters of the resin can be obtained solely by color depth, solely by uniformity of arrangement, or by a combination of color depth and uniformity of arrangement.

[0051] By setting it up in this way, the amount of color change and / or the amount of change in uniformity of the resin are correlated with the amount of change in the regeneration activity of the resin. This allows the regeneration activity of the resin to be quantified by obtaining the color depth and / or uniformity of the resin, thereby accurately assessing the current regeneration activity of the resin.

[0052] like Figure 2 As shown, in a preferred embodiment of the present invention, the step of "obtaining the theoretical water volume required for the regeneration mode based on capacity parameters and / or activity parameters" specifically includes: S211: Calculate the theoretical water volume according to the formula L=[L1×M×X] / M1; Where L represents the theoretical water volume, L1 represents the capacity parameter, M represents the theoretical salt consumption required for complete regeneration of each liter of resin, M1 represents the theoretical salt dissolution rate per liter of water, and X represents the activity parameter.

[0053] In this application, L1 = 10 liters, M = 0.12 kg, M1 = 0.36 kg, and X is any value between 0 and 1, subject to the actual obtained result.

[0054] By constructing a reasonable model of the relationship between influencing factors and theoretical water volume, the accuracy of theoretical water volume calculation is improved by comprehensively analyzing multiple influencing factors.

[0055] After water is introduced into the salt tank, it takes a certain amount of time for the salt concentration to reach saturation. In order to accurately control the salt dissolution time, preferably, after the water volume in the salt tank reaches the theoretical water volume, the control method of the present invention further includes: Obtain the sodium ion concentration in the salt tank and record it as the first concentration; Once the first concentration reaches the first preset concentration, the brine in the salt tank is introduced into the resin for ion exchange.

[0056] Specifically, this application installs saturation testing modules and sodium ion detection modules in the salt tank and at each water inlet, enabling the detection of sodium ion concentration in the brine. By monitoring the sodium ion concentration in the brine in the salt tank in real time, the dissolution progress is monitored, allowing the brine to be promptly introduced into the resin after reaching saturation, thereby shortening the dissolution and regeneration times. In this application, the first preset concentration is preferably set to 2.3 mol / L.

[0057] Preferably, in the process of "introducing brine from the salt tank into the resin for ion exchange", the control method of the present invention further includes: The sodium ion concentration of the brine discharged during the ion exchange process is recorded as the second concentration. When the second concentration drops to the second preset concentration, stop introducing brine into the resin.

[0058] This setup allows for real-time monitoring of the sodium ion concentration in the brine after ion exchange with the resin, enabling the tracking of resin regeneration progress and precise control of the regeneration process time. Preferably, the second preset concentration is set to 0.5 mmol / L.

[0059] Preferably, before "introducing the brine from the salt tank into the resin for ion exchange", the control method of the present invention further includes: The resin is backwashed; That is, by controlling the valve body, the raw water inlet is connected to the outlet of the resin tank, and the drain outlet is connected to the inlet of the resin tank, so that the water flow is introduced into the resin tank through the raw water inlet and the outlet, and the water flow passes through the resin particles in the opposite direction to the water softening, so as to achieve reverse flushing of the resin particles, and the wastewater and impurities after flushing are discharged through the inlet and the outlet.

[0060] This removes residual suspended matter and broken resin particles between the resin particles, loosens the resin layer, and allows the saturated brine to fully contact the resin particles, improving the regeneration effect in subsequent regeneration processes.

[0061] More preferably, after the resin has completed ion exchange, the control method of the present invention further includes: Perform a forward wash on the resin; That is, by controlling the valve body, the raw water inlet is connected to the inlet of the resin tank, and the drain outlet is connected to the outlet of the resin tank, so that the water flow is introduced into the resin tank through the raw water inlet and the inlet, and the water flow passes through the resin particles in the softening direction of the water flow, so as to achieve positive rinsing of the resin particles, and the wastewater and impurities after rinsing are discharged through the outlet and the drain outlet.

[0062] This allows for the complete removal of the brine remaining between the resin particles during the salt absorption and regeneration process, thus meeting the water production requirements.

[0063] Regarding the time control of the backwashing and forward washing processes, a preset time can be set during backwashing, or a turbidity sensor can be installed at the drain outlet to detect the turbidity value of the flushed wastewater. When the turbidity value drops to the preset value, it indicates that the impurities in the resin layer have been flushed away, and salt regeneration can be performed. Preferably, the duration of both forward and backwashing can be flexibly set, such as 3 to 5 minutes, and the turbidity value can be set to 0.3 NUT.

[0064] Preferably, during the forward washing process, the control method of the present invention further includes: The sodium ion concentration of the brine discharged during the forward rinsing process is recorded as the third concentration; Once the third concentration drops to the third preset concentration, the forward rinsing of the resin ends and the soft water mode is executed.

[0065] This setup allows for real-time monitoring of the sodium ion concentration in the water used to rinse the resin, enabling control over the removal of residual brine from the resin and precise control of the backwash time. Preferably, the third preset concentration is set to 0.03 mmol / L.

[0066] Preferably, during the process of the water softener executing the water softening mode, the control method of the present invention further includes: Obtain the hardness value of the water before it enters the resin, and record it as the first hardness value; The hardness value of the water after it flows out of the resin is obtained and recorded as the second hardness value; The regeneration mode is selectively executed based on the first hardness value and the second hardness value.

[0067] Specifically, the difference between the first hardness value and the second hardness value is calculated. When the difference is less than the preset difference, it indicates that the resin is close to saturation and has low activity, which cannot meet the softening requirements of the water flow. At this time, the regeneration mode needs to be executed to restore the activity of the resin.

[0068] Since water hardness varies in different regions, the softening performance of resin can be accurately evaluated by measuring the difference in hardness before and after softening, regardless of geographical location.

[0069] Preferably, in this invention, the preset difference is set to 100 mg / L.

[0070] Furthermore, the water softener provided by the present invention, based on the above-mentioned control method, possesses the technical effects of the above-mentioned control method. Compared with the water softener before the improvement, the water softener of the present invention can not only ensure that the resin can be fully regenerated, but also accurately control the amount of water and salt used in the regeneration process, thereby improving the regeneration efficiency, reducing the regeneration time, and avoiding the waste of water and salt.

[0071] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A control method of a water softener including a resin and a salt tank, characterized by, The control method comprises: when it is required to perform the regeneration mode, obtaining a parameter of the resin; according to the parameter of the resin, obtaining a theoretical water amount required by the regeneration mode; supplementing water into the salt tank so that the water amount in the salt tank reaches the theoretical water amount.

2. The control method according to claim 1, characterized by, The step of "obtaining the parameter of the resin" specifically comprises: obtaining a capacity parameter of the resin and / or an activity parameter of the resin; The step of "according to the parameter of the resin, obtaining the theoretical water amount required by the regeneration mode" specifically comprises: according to the capacity parameter and / or the activity parameter, obtaining the theoretical water amount required by the regeneration mode.

3. The control method according to claim 2, characterized by, The step of "obtaining the activity parameter of the resin" specifically comprises: obtaining a color depth of the resin and / or an arrangement uniformity of the resin; according to the color depth and / or the arrangement uniformity, obtaining the activity parameter of the resin.

4. The control method according to claim 2, characterized by, The step of "according to the capacity parameter and / or the activity parameter, obtaining the theoretical water amount required by the regeneration mode" specifically comprises: calculating the theoretical water amount according to the formula L=[L1×M×X] / M1; wherein L represents the theoretical water amount, L1 represents the capacity parameter, M represents a theoretical salt consumption amount required for complete regeneration of each liter of the resin, M1 represents a theoretical salt dissolving amount of each liter of water, and X represents the activity parameter.

5. The control method according to claim 1, characterized by, After the water amount in the salt tank reaches the theoretical water amount, the control method of the application further comprises: obtaining a sodium ion concentration in the salt tank, denoted as a first concentration; when the first concentration reaches a first preset concentration, guiding the brine in the salt tank into the resin for ion exchange.

6. The control method according to claim 5, characterized by In the process of "guiding the brine in the salt tank into the resin for ion exchange", the control method of the application further comprises: obtaining a sodium ion concentration of the brine discharged in the ion exchange process, denoted as a second concentration; when the second concentration falls to a second preset concentration, stopping guiding the brine into the resin.

7. The control method according to claim 5, characterized by Before "guiding the brine in the salt tank into the resin for ion exchange", the control method of the application further comprises: performing backwashing on the resin; and / or After the resin completes ion exchange, the control method of the application further comprises: performing forward washing on the resin.

8. The control method according to claim 7, characterized by, In the process of performing forward washing on the resin, the control method of the application further comprises: obtaining a sodium ion concentration of the brine discharged in the forward washing process, denoted as a third concentration; when the third concentration falls to a third preset concentration, ending the forward washing on the resin and performing a soft water mode.

9. The control method according to any one of claims 1 to 8, characterized by, In the process of the soft water machine performing the soft water mode, the control method of the application further comprises: obtaining a hardness value of water flow before entering the resin, denoted as a first hardness value; obtaining a hardness value of water flow after flowing out of the resin, denoted as a second hardness value; according to the first hardness value and the second hardness value, selectively performing the regeneration mode.

10. A water softener characterised by, The soft water machine comprises a controller configured to be capable of performing the control method according to any one of claims 1 to 9.

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