Control method of dish washer
阅读说明：本技术 洗碗机的控制方法 (Control method of dish washer ) 是由 黄隆重 徐伟 周静 黄海 许伟东 黄宁杰 于 2020-04-30 设计创作，主要内容包括：本申请公开洗碗机的控制方法。其中,洗碗机的单次洗碗流程包括至少一个工作阶段,每一工作阶段包括进水阶段和洗涤阶段,所述洗碗机的控制方法包括：获取运行软化功能的水软化装置在当前工作阶段的进水阶段末段所产生水的硬度值；如果所述硬度值小于预设的第一硬度阈值,则确定所述水软化装置足够产生满足下一需要软水洗涤的工作阶段的硬度需求的水量；控制所述水软化装置在当前工作阶段的进水阶段结束后,直至下一需要软水洗涤的工作阶段才再次运行软化功能。上述实施方式中,水软化装置的软化能力能够得到有效利用,减少水软化装置的再生频次,有利于减少水资源的浪费。(The application discloses a control method of a dishwasher. Wherein, the single dish washing process of the dish washing machine comprises at least one working stage, each working stage comprises a water inlet stage and a washing stage, and the control method of the dish washing machine comprises the following steps: acquiring the hardness value of water generated by the water softening device with the softening function at the end of the water inlet stage of the current working stage; if the hardness value is less than a preset first hardness threshold value, determining that the water softening device is sufficient to generate water quantity meeting the hardness requirement of the next working stage needing soft water washing; and controlling the water softening device to operate the softening function again until the next working stage needing soft water washing after the water inlet stage of the current working stage is finished. In the above embodiment, the softening capacity of the water softening device can be effectively utilized, the regeneration frequency of the water softening device is reduced, and the waste of water resources is reduced.)
1. A control method of a dishwasher is characterized in that a single dish washing process of the dishwasher comprises at least one working stage, each working stage comprises a water inlet stage and a washing stage, and the control method of the dishwasher comprises the following steps:
acquiring the hardness value of water generated by the water softening device with the softening function at the end of the water inlet stage of the current working stage;
if the hardness value is less than a preset first hardness threshold value, determining that the water softening device is sufficient to generate water quantity meeting the hardness requirement of the next working stage needing soft water washing;
and controlling the water softening device to operate the softening function again until the next working stage needing soft water washing after the water inlet stage of the current working stage is finished.
2. The control method as set forth in claim 1, wherein the water softening device includes a plurality of first electrodes and a plurality of second electrodes stacked together, the first electrodes and the second electrodes being alternately disposed and having opposite polarities; a channel for water to pass through is formed between the first electrode and the second electrode adjacent to the first electrode, and one side of one of the two electrodes, which faces the channel, is provided with an adsorption layer for adsorbing target cations; the water softening device switches the softening function and the regeneration function by changing the polarity of the first electrode and the polarity of the second electrode.
3. The control method according to claim 2, wherein if there is at least one working phase not requiring soft water washing between the current working phase and the next working phase requiring soft water washing, the water softening device is controlled to be in the power-off state and the running of tap water into the dish washing cavity, or the water softening device is controlled to run the regeneration function and the water generated by the running of the regeneration function is controlled to be fed into the dish washing cavity in the water feeding phase corresponding to the working phase not requiring soft water washing.
4. The control method according to claim 2, wherein after the step of obtaining the hardness value of water produced by the water softening device operating the softening function at the end of the water inlet phase of the current operation phase, the control method further comprises:
under the condition that the hardness value is greater than or equal to a first hardness threshold value but less than a second hardness threshold value, if at least one working stage which does not need soft water washing exists between the current working stage and the next working stage which needs soft water washing, controlling the water softening device to operate the softening function again and introducing water generated by the operation of the softening function into the bowl washing cavity in the water inlet stage corresponding to the working stage which does not need soft water washing;
wherein the second hardness threshold value characterizes a nominal maximum hardness value of the washing water in the dishwashing chamber during a working phase requiring soft water washing.
5. The control method according to claim 2, wherein after the step of obtaining the hardness value of water produced by the water softening device operating the softening function at the end of the water inlet phase of the current working phase, the control method further comprises:
if the hardness value is larger than or equal to a second hardness threshold value, controlling the water softening device to operate a regeneration function before the next working stage needing soft water washing is operated; wherein the second hardness threshold value is greater than the first hardness threshold value, and the second hardness threshold value represents a rated maximum hardness value of the washing water in the dishwashing cavity in a working stage requiring soft water washing.
6. The control method of claim 1, wherein obtaining the hardness value of the water produced by the water softening device operating the softening function in the end of the water inlet phase of the current working phase comprises:
detecting the total dissolved solid matter value of water at the water outlet of the water softening device at the end of the water inlet stage of the current working stage; calculating a hardness value corresponding to the detected total soluble solid matter value according to the conversion relation between the total soluble solid matter value and the hardness value; or the like, or, alternatively,
detecting the conductivity value of water at the water outlet of the water softening device at the end of the water inlet stage of the current working stage; and calculating the hardness value corresponding to the detected conductivity value according to the conversion relation between the conductivity value and the hardness value.
7. The control method according to any one of claims 1 to 6, wherein the end of the water inlet phase of the current working phase lasts from 80% of the total length of the water inlet phase of the current working phase to the end of the water inlet phase.
8. The control method according to any one of claims 1 to 6, wherein the first hardness threshold is in the range of 2dh to 8 dh.
9. A control method according to claim 4 or 5, characterised in that the second hardness threshold is in the range 8dh to 11 dh.
10. The control method as claimed in any one of claims 1 to 9, wherein the single dish washing process of the dishwasher comprises a pre-washing operation stage, a main-washing operation stage and a rinsing operation stage which are sequentially performed, wherein the main-washing operation stage and the rinsing operation stage of the dishwasher are both operation stages requiring washing with soft water, and the main-washing operation stage and the rinsing operation stage both heat washing water.
Technical Field
The application relates to the field of household appliances, in particular to a control method of a dish washing machine.
Background
Disclosure of Invention
The application provides a control method of a dishwasher, a single dish washing process of the dishwasher comprises at least one working phase, each working phase comprises a water inlet phase and a washing phase, and the control method of the dishwasher comprises the following steps:
acquiring the hardness value of water generated by the water softening device with the softening function at the end of the water inlet stage of the current working stage;
if the hardness value is less than a preset first hardness threshold value, determining that the water softening device is sufficient to generate water quantity meeting the hardness requirement of the next working stage needing soft water washing;
and controlling the water softening device to operate the softening function again until the next working stage needing soft water washing after the water inlet stage of the current working stage is finished.
According to the control method of the dishwasher provided by the embodiment, the hardness value of water generated by the operation of the softening function of the water softening device at the end of the water inlet stage of the current working stage is detected, the softening capacity of the water softening device is measured according to the hardness value, and when the water softening device is determined to generate enough soft water to support the next working stage needing soft water washing according to the obtained hardness value, the water softening device is controlled to operate the softening function again until the next working stage needing soft water washing after the water inlet stage of the current working stage is finished, so that the softening capacity of the water softening device can be effectively utilized, the regeneration frequency of the water softening device is reduced, and the waste of water resources caused by the requirement of the regeneration function is reduced.
Drawings
FIG. 1 is a schematic diagram of a water softening device according to an exemplary embodiment of the present application;
FIG. 2 is a cross-sectional view from one perspective of the water softener shown in FIG. 1;
FIG. 3 is a flow chart of a method of controlling a dishwasher in accordance with an exemplary embodiment of the present application;
FIG. 4 is a flow chart of another method of controlling a dishwasher in accordance with an exemplary embodiment of the present application;
FIG. 5 is a flow chart of another method of controlling a dishwasher in accordance with an exemplary embodiment of the present application;
FIG. 6 is a flow chart of another method of controlling a dishwasher in accordance with an exemplary embodiment of the present application;
fig. 7 is a flowchart of a control method of a dishwasher according to an exemplary embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the use of "first," "second," and similar terms in the description and claims do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Similarly, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one; similarly, "a plurality" and the like mean two or more. The following describes exemplary embodiments of the present application in detail with reference to the drawings. The features of the following examples and embodiments can be supplemented or combined with each other without conflict.
The control method of the dishwasher provided by the application can be applied to the dishwasher with the capacitive deionization type water softening device. Wherein the water softening device may include a first electrode and a second electrode of opposite polarities, and the water softening device operates a softening function or a regeneration function by changing the polarity of the first electrode and the polarity of the second electrode. The dishwasher is provided with a control device, such as a control circuit board. The control device is electrically connected with the water softening device, the washing device and other working components to control the other devices or components to work. Of course, the control method of the dishwasher provided by the present application may also be applied to dishwashers having other types of water softeners, which may also be ion exchange resin type water softeners. The ion exchange resin type water softening device can adopt cation exchange resin to exchange some cations (such as calcium and magnesium ions) in water by using the hydrogen ions of the ion exchange resin, so as to achieve the purpose of softening water, and when the water softener needs to be regenerated, water resources are required to be facilitated to dissolve dish washing salt in a salt tank of the water softener, and strong brine is used for washing the ion exchange resin for multiple times, so that the metal calcium and magnesium cations are replaced, and the recovery of the soft water capacity is realized. The working principle and the related structure of the ion exchange resin type water softening device are the prior art, and redundant description is not repeated in the application.
In some embodiments of the present application, please refer to fig. 1 and 2, the capacitive
The
The
When the
After the adsorption capacities of the first adsorption layer and the second adsorption layer are saturated, the directions of the positive electrode and the negative electrode of a power supply connected with the
In some embodiments of the present application, when a forward voltage is applied between the first electrode and the second electrode, the
Referring to fig. 3, and as occasion demands, referring to fig. 4 to 7, the method for controlling a dishwasher provided by the present application may include the steps of:
in step S101: and acquiring the hardness value of water generated by the water softening device operating the softening function at the end of the water inlet stage of the first working stage. The first working phase is the working phase currently in progress.
In step S103, if the hardness value is smaller than the preset first hardness threshold, the water softening device is controlled to continue to operate the softening function until the second working stage after the water inlet stage of the first working stage is finished. Wherein, the second working phase and the first working phase can belong to the same dish washing process, and the second working phase is the next working phase which needs soft water washing and is operated after the first working phase. For example, in a dishwashing program, the second operation phase may be run immediately after the first operation phase, or there may be other operation phases between the second operation phase and the first operation phase. Of course, the second working phase and the first working phase may also belong to different dishwashing processes, for example, the first working phase is a certain working phase in a first complete dishwashing process, and the second working phase is a certain working phase in a second complete dishwashing process.
The determination of whether a certain working phase requires soft water washing may be preset based on the dishwasher program or selected by the user according to the actual situation. In some embodiments of the present application, the operation stage using the heated washing water may be determined as an operation stage requiring washing with soft water. In hot water washing, metal cations are more likely to be converted into calcium carbonate, magnesium hydroxide, and the like which are hardly soluble than in cold water washing, and scale is likely to be formed. Therefore, in an embodiment of the present application, the washing stage of the second working stage heats the washing water. When the hardness value is less than a preset first hardness threshold value, it may be determined that the water softening device is sufficient to generate an amount of water that meets the hardness requirement of the wash water within the dishwashing chamber during the second operational phase.
The single dishwashing cycle of the dishwasher comprises at least one working phase, each working phase comprising a water intake phase and a washing phase. In particular, the operational phase of the dishwasher may comprise a combination of one or more of a pre-wash phase, a main wash phase and a rinse phase. Correspondingly, the prewash stage comprises a prewash water-in stage, a prewash wash stage. The main wash stage includes a main wash water intake stage and a main wash stage. The rinsing stage includes a rinsing water-in stage and a rinsing washing stage.
In some dishwasher products, a complete dishwashing cycle has only a main wash phase as a working phase. In other dishwasher products, a complete dishwashing cycle has working phases comprising a main wash phase and a rinse phase, which are carried out sequentially. In still other dishwasher products, a complete dishwashing cycle includes a pre-wash phase, a main wash phase and a rinse phase in sequence. The dishwasher having two or more of a pre-washing stage, a main-washing stage and a rinsing stage, the washing pattern of the dishwasher may include various patterns. For example, a dishwasher having a pre-wash stage and a main-wash stage may be provided with a plurality of selectable wash modes. For example, in one washing mode, a complete dishwashing cycle may include only a main wash phase. In another mode, a complete dishwashing cycle has operational phases including a main wash phase and a rinse phase. In yet another mode, a complete dishwashing cycle has operational phases including a pre-wash phase, a main wash phase, and a rinse phase.
The dishwasher may use heated washing water or unheated washing water for each operation stage. The washing agent can be added or not added in each working stage of the dishwasher. For example, the rinse phase may include a hot water rinse phase in which the dishes are washed with hot water or a cold water rinse phase in which the dishes are washed with unheated water (e.g., tap water). The working phase with heated wash water is required, which is generally heated during the washing phase.
Some embodiments of the present application are described in the context of a single dishwashing cycle of a dishwasher, the operational phases of which include a main wash phase and a rinse phase. Wherein, the tableware is washed by adding detergent and adopting a hot water washing mode in the main washing stage. The rinsing stage is a hot water rinsing stage in which the dishes are washed with heated water. In some scenarios, the rinse stage may add a brightener or a dish polish to wash the dishes. Accordingly, the first working phase is the main wash phase. The second working phase is a hot rinse phase. The first working stage and the second working stage belong to the same dish washing process. Of course, in some embodiments, the dishwasher may further include a third operation stage between the first operation stage and the second operation stage, which does not require heating of the washing water. I.e. the operational phase of the dishwasher may also comprise an operational phase between the main wash phase and the hot rinse phase, in which no heating of the wash water is required, such as an operational phase in which the washing of the dishes can be carried out directly with tap water.
In the embodiment of the present application, the end of the water inlet stage of the first working stage may be understood as a period from a certain time point when the water inlet stage of the first working stage is about to end to the end of the water inlet stage. For example, in some embodiments, the end of the intake phase of the first operational phase may be set to last from 80% of the total length of the intake phase of the first operational phase to the end of the intake phase. In other embodiments, the end of the intake phase of the first operational phase may be set to last from 90% of the total length of the intake phase of the first operational phase to the end of the intake phase. In still other embodiments, the end of the intake phase of the first operational phase may be set to last from 95% of the total length of the intake phase of the first operational phase to the end of the intake phase. The end of the water inlet stage can be set according to specific conditions, and the application is not limited to this.
In step S101, in some embodiments, the hardness value of the water produced in the end of the water inlet phase of the first working phase of the water softening device operating the softening function is obtained by:
in step S1011, the total soluble solid matter value of the water at the water outlet of the water softening device at the end of the water inlet stage of the first working stage is detected.
In step S1012, a hardness value corresponding to the detected total soluble solid matter value is calculated from the conversion relationship between the total soluble solid matter value and the hardness value.
Specifically, a total soluble solid matter value detector can be arranged at the water outlet of the water softening device to detect the total soluble solid matter value of the water at the water outlet of the water softening device at the end of the water inlet stage. For example, the total soluble solids value detector may detect in real time the total soluble solids value of water produced by the water softener during operation of the softener function. The total soluble solid matter value detector or the control device of the dishwasher can acquire the total soluble solid matter value detected in real time in the period of the end stage of the water inlet stage according to the preset end stage of the water inlet stage in the dishwasher. If the detected total soluble solid matter value is a plurality of values, the maximum value in the plurality of values can be taken as the total soluble solid matter value of the water at the water outlet of the water softening device at the end of the water inlet stage. Of course, in some embodiments, the average of the plurality of values may also be taken as the total dissolved solids value of the water at the outlet of the water softener at the end of the water inlet stage.
Of course, the total soluble solid matter value detector can also directly detect the total soluble solid matter value of the water generated by the water softening device operating the softening function at the end of the water inlet stage according to the set end of the water inlet stage in the dishwasher. The present application is not limited to this, and may be set according to a specific application environment.
In other embodiments, obtaining the hardness value of the water produced in the end of the water inlet phase of the first working phase of the water softening device operating the softening function may be implemented by:
in step S1013, the conductivity value of the water at the water outlet of the water softening device at the end of the water inlet stage of the first working stage is detected.
In step S1014, a hardness value corresponding to the detected conductivity value is calculated based on the conversion relationship between the conductivity value and the hardness value.
Specifically, a conductivity meter can be arranged at the water outlet of the water softening device to detect the conductivity value of the water at the water outlet of the water softening device at the end of the water inlet stage. For example, the conductivity meter can detect the conductivity value of water generated by the water softening device in the softening function in real time. The conductivity meter or the control device of the dishwasher can acquire the conductivity value detected in real time in the period of the end stage of the water inlet stage according to the preset end stage of the water inlet stage in the dishwasher. If the detected conductivity values are multiple values, the maximum value in the multiple values can be taken as the conductivity value of the water at the water outlet of the water softening device at the end of the water inlet stage. Of course, in some embodiments, the average of the plurality of values may also be taken as the conductivity value of the water at the water outlet of the water softener at the end of the water inlet stage.
Similarly, the conductivity meter can also directly detect the conductivity value of water generated by the water softening device in the softening function according to the set water inlet stage end in the dishwasher. The present application is not limited to this, and may be set according to a specific application environment.
It should be noted that, after the water inlet stage of the first working stage is finished, the water softening device can be controlled to stop operating the softening function, so as to be started when needed subsequently. Accordingly, stopping the softening function may shut off the softening function of the water softening device, as well as de-energizing the water softening device.
In some embodiments, before step S103, the control method of the dishwasher may include step S102: it is determined whether the hardness value acquired in step S101 is less than a first hardness threshold value.
In case the determination result of step S102 is yes, the dishwasher is controlled to perform step S103.
For the water softening device at the end of the water inlet stage, which generates water with a hardness value smaller than the preset first hardness threshold value when the softening function is operated, it can be understood that the water generated by the water softening device when the water softening device continues to operate the softening function can meet the water demand of the second working stage requiring soft water washing, i.e. the water softening device continues to operate the softening function and generates water with a hardness value meeting the hardness demand of the second working stage.
In some embodiments, the first hardness threshold ranges from 2dh to 8 dh. That is, the first hardness threshold may be set to any one of values from 2dh to 8 dh. The specific value of the first hardness threshold may be set according to specific dishwasher product requirements, etc., and the present application is not limited thereto. The hardness values of water to which some embodiments of the present application relate are all in accordance with the current german water hardness standard.
In some embodiments, please refer to fig. 4, in the case that the determination result of step S102 is yes, step S103 may specifically include the following steps:
in step S1031, it is determined whether a third operating phase, in which soft water washing is not required, exists between the first and second operating phases. Specifically, it may be determined whether there is a third operation stage between the first operation stage and the second operation stage, in which the washing water does not need to be heated.
In the case where the determination result of step S1031 is no, step S1032 is executed, and in the case where the determination result of step S1031 is yes, step S1033 is executed.
In step S1032, the water softening device is controlled to continue to operate the softening function in the water inlet stage of the second working stage.
In step S1033, in the water inlet stage of the third working stage, the water softening device is controlled to be in the power-off state and tap water is controlled to be introduced into the bowl washing cavity.
I.e. for embodiments in which no other phase of operation between the first phase of operation and the second phase of operation is required for heating the washing water, the water softening device of the dishwasher may be controlled to operate the softening function again during the water inlet phase of the second phase of operation, and the water produced by the water softening device continuing to operate the softening function may be controlled to flow into the dishwashing cavity as washing water for the second phase of operation.
For embodiments in which at least one third operating phase, in which no heating of the washing water is required, is present between the first and second operating phases, the water softening device is controlled to be switched off and the tap water is controlled to be passed into the dishwashing chamber as washing water for the third operating phase during the water inlet phase of the third operating phase. The mode that the running water lets in and washes the bowl chamber can be that the export of running water valve passes through the pipeline direct intercommunication with the chamber of washing the dishes, or the running water gets into the water softener of outage state earlier, gets into from the rivers passageway of water softener and washes the bowl chamber, because the water softener is in outage state this moment, it does not soften the function or the regeneration function to the running water in the passageway, provides a flow channel in other words for the running water.
And after the third working stage is finished, controlling the water softening device of the dishwasher to operate the softening function again in the water inlet stage of the second working stage, and controlling the water softening device to continuously operate the water generated by the softening function to flow into the dish washing cavity to be used as the washing water of the second working stage.
In other embodiments, please refer to fig. 5, in the case that the determination result of step S102 is yes, step S103 may specifically include step S1031, step S1032 and step S1034, and in the case that the determination result of step S1031 is no, step S1032 is executed, and in the case that the determination result of step S1031 is yes, step S1034 is executed.
Step S1031 and step S1032 can be referred to the above-mentioned related description.
In step S1034, the water softening device is controlled to operate the regeneration function and the water generated by the operation of the regeneration function is introduced into the bowl washing cavity.
In some embodiments, that is, for the water softening device to operate the softening function at the end of the detected water inlet stage of the first working stage, the hardness value of the water generated by the water softening device is less than the first hardness threshold value, and at least one third working stage without soft water washing exists between the first working stage and the second working stage, for example, at least one third working stage without heating the washing water exists between the first working stage and the second working stage, in the water inlet stage of the third working stage, the water softening device can be controlled to operate the regeneration function and the water generated by the regeneration function can be introduced into the dish washing cavity, so that the water with relatively higher hardness generated by the regeneration function of the water softening device can be well utilized in the washing stage without soft water washing, and waste of water resources can be reduced.
Of course, in other embodiments, in case that the determination result of step S1031 is yes, the water produced by the water softening device operating the regeneration function may also be controlled to be drained through the drain line of the dishwasher; and controlling the tap water to be introduced into the bowl washing cavity to be used as the washing water in the third working stage. The present application is not limited to this, and may be configured according to a specific application environment.
In some embodiments, the water outlet of the water softening device and the washing chamber may be in communication via a conduit. For example, a valve may be provided at the water inlet of the washing chamber, or in the conduit or at the water outlet of the water softening device, so that the opening or closing of the conduit between the water outlet of the water softening device and the washing chamber may be controlled by controlling the opening and closing of the valve. The pipeline between the water outlet of the water softening device and the washing cavity can be opened and the pipeline between the water outlet of the water softening device and the drainage pipeline can be closed through the control valve, so that the water generated by the water softening device with the operation softening function flows into the washing cavity of the dish washing machine. Of course, the softened water generated by the water softening device in the regeneration function needs to enter the washing chamber, and the operation can be realized by a similar method, which is not described herein again. In addition, the water outlet of the water softening device and the water discharge pipeline of the dishwasher can be communicated through a pipeline. Specifically, a valve can be arranged between the water outlet of the water softening device and the water discharge pipeline of the dishwasher, so that the opening or closing of the pipeline between the water outlet of the water softening device and the water discharge pipeline of the dishwasher can be controlled by controlling the opening and closing of the valve.
In other embodiments, the water outlet of the water softener, the washing chamber and the drain line can be connected in series through pipes. Namely, the water outlet of the water softening device is communicated with the water drainage pipeline through the washing cavity. Valves can be arranged at the water inlet of the washing cavity and the water inlet of the water drainage pipeline, or in the pipeline or at the water outlet of the water softening device, so that the opening or closing between the water outlet of the water softening device and the washing cavity and the opening or closing of the pipeline between the water outlet of the washing cavity and the water drainage pipeline can be controlled by controlling the opening and closing of the valves. Correspondingly, when water needs to be drained, a pipeline between the water outlet of the washing cavity and the drainage pipeline is opened, so that water in the washing cavity of the dishwasher is drained from the drainage pipeline.
Further, after step S101, the control method of the dishwasher further includes:
on a condition that the hardness value is determined to satisfy greater than or equal to a first hardness threshold, but less than a second hardness threshold: if at least one third working stage which does not need soft water washing exists between the first working stage and the second working stage, controlling the water softening device to operate the softening function again in the water inlet stage of the third working stage and introducing water generated by the operation of the softening function into the dish washing cavity; otherwise, the water softening device is controlled to operate the regeneration function before the second working phase.
Specifically, in some embodiments, this may be achieved by step S102, step S104, step S105, step S106, and step S107 as shown in fig. 3. Here, after step S101, step S102 may be executed by executing step S104 if the determination result of step S102 is no, step S105 if the determination result of step S104 is yes, step S106 further if the determination result of step S105 is yes, and step S107 if the determination result of step S105 is no. Step S102 may refer to the related description above.
In step S104, it is determined whether the hardness value acquired in step S101 is less than a second hardness threshold value.
In step S105, it is determined whether there is a third operation stage between the first operation stage and the second operation stage in which soft water washing is not required.
In step S106, the water softening device is controlled to continue to operate the softening function in the water inlet stage of the third working stage and to introduce the water generated by the operation of the softening function into the dish washing cavity.
In step S107, the water softening device is controlled to operate the regeneration function before the second operation phase is operated. In this way, the softening capacity of the water softening device can be restored before the second operating phase is run, so that the water softening device is able to provide wash water meeting the hardness requirement in the second operating phase of the dishwasher.
Further, in some embodiments, in the case where the determination result of the above step S104 is no, step S107 may also be performed.
It should be noted that, in other embodiments, as shown in fig. 6, after the step S101, the process may also directly proceed to the step S108: it is determined whether the hardness value acquired in step S101 is greater than or equal to the first hardness threshold value and less than the second hardness threshold value. Further, step S105 and related steps subsequent to step S105 may be executed on the condition that the determination result of step S108 is yes.
The second hardness threshold value represents a rated maximum hardness value of water in the dish washing cavity in a working stage needing soft water washing. The second hardness threshold is greater than the first hardness threshold. In some embodiments, the second hardness threshold ranges from 8dh to 11 dh. That is, the second hardness threshold may be set to any one of values from 8dh to 11 dh. The specific value of the second hardness threshold may be set according to the specific dishwasher product requirements, the first hardness threshold, and the like, and the application is not limited thereto.
Further, after step S101, the control method of the dishwasher further includes:
and if the hardness value is greater than or equal to a second hardness threshold value, controlling the water softening device to operate a regeneration function before the second working phase is operated. Wherein the second hardness threshold is greater than the first hardness threshold, and the second hardness threshold represents a rated maximum hardness value of water in the dish washing cavity in a working stage requiring soft water washing.
Specifically, in some embodiments, as shown in fig. 3, after step S101, step S102 and step S104 may be performed in sequence, and step S107 may be performed if the result of step S104 is determined to be no. As shown in fig. 3, when step S102 and step S104 are sequentially executed and the result of step S104 is determined to be no, it is determined that the hardness value acquired in step S101 is greater than or equal to the second hardness threshold value, and step S107 is further executed.
Of course, in other embodiments, as shown in fig. 7, after step S101, step S109 may also be entered directly: it is determined whether the hardness value acquired in step S101 is greater than or equal to a second hardness threshold value. And performs step S107 in the case where the result of the determination step S109 is yes. In this way, the softening capacity of the water softening device can be restored before the dishwasher is operated in the second operating phase, so that the water softening device is able to provide wash water which meets the hardness requirement in the second operating phase of the dishwasher.
Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.
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