A method for detecting the degree of contamination of a dishwasher inner container and an intelligent cleaning control method

Abstract

The application discloses a method for detecting the dirtiness of a dishwasher inner container and an intelligent cleaning control method, and belongs to the technical field of household appliances. The method comprises the following steps: acquiring a load current value fed back by a pump body in the dishwasher; determining water turbidity according to the load current value; judging the dirtiness of the inner container according to the water turbidity; determining the detergent input amount according to the dirtiness of the inner container; and inputting the detergent and cleaning. The method determines the water turbidity in the inner container of the dishwasher according to the load current value fed back by the pump body, then determines the dirtiness of the inner container according to the water turbidity, and finally determines the detergent input amount according to the dirtiness of the inner container, so that the detergent input amount is consistent with the actual washing demand, and the waste or deficiency of the detergent is prevented. Since a turbidity sensor is not needed, and only the load current value fed back by the pump body possessed by the dishwasher is acquired to determine the water turbidity, the cost is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and in particular to a method for detecting the degree of soiling inside a dishwasher and an intelligent cleaning control method. Background Technology

[0002] Dishwashers have become increasingly common in homes, bringing great convenience to people's lives, and their functions are constantly being optimized. However, most existing dishwashers focus on optimizing the cleaning effect to make dishes cleaner, with relatively few optimizing the use of detergent. Generally, detergent is added in fixed amounts during washing, which may far exceed the actual need, resulting in waste, or insufficient detergent affecting the cleaning effect. Existing technologies for variable detergent dosage typically use turbidity sensors to detect the turbidity of the water in the dishwasher drum, thereby determining the amount of detergent to add. However, this method increases costs due to the addition of the turbidity sensor. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art or related art, namely, the problem that the cost of sensing the turbidity of water in the inner tank of a dishwasher is too high.

[0004] To achieve the above objectives, a first aspect of the present invention provides a method for detecting the degree of soiling in the inner drum of a dishwasher. This method correlates the magnitude of the load current fed back by the pump body of the dishwasher with the turbidity of the water in the dishwasher, and then determines the degree of soiling in the inner drum of the dishwasher based on the water turbidity.

[0005] The second invention provides an intelligent cleaning control method, which uses the dishwasher inner tank stain detection method as described in the above technical solution, and determines the detergent dosage based on the detected inner tank stain level to meet the actual cleaning needs.

[0006] Specifically, the following technical solutions are included:

[0007] According to a first aspect of the present application, a method for detecting the degree of soiling in the inner tank of a dishwasher is provided. The method includes: obtaining a load current value fed back by a pump in the dishwasher; determining water turbidity based on the load current value; and judging the degree of soiling in the inner tank based on the water turbidity.

[0008] Furthermore, the step of obtaining the load current value fed back by the pump body in the dishwasher includes: obtaining the pump body feedback current value with a fixed time difference Δt as the period, and taking the average value of all the obtained pump body feedback current values ​​as the load current value.

[0009] Furthermore, the pump body includes a cleaning pump; the turbidity of the inner tank water is determined based on the first load current value fed back by the cleaning pump.

[0010] Preferably, the first load current value is divided into three intervals: when the first load current value is in interval A, the turbidity of the inner tank water is clear and the staining degree of the inner tank is no stain; when the first load current value is in interval B, the turbidity of the inner tank water is relatively cloudy and the staining degree of the inner tank is slightly stained; when the first load current value is in interval C, the turbidity of the inner tank water is cloudy and the staining degree of the inner tank is heavily stained.

[0011] Furthermore, the pump body also includes a drain pump; the turbidity of the drain water is determined based on the second load current value fed back by the drain pump.

[0012] Preferably, the second load current value is divided into three intervals: when the second load current value is in the X interval, the turbidity of the drainage water is clear; when the second load current value is in the Y interval, the turbidity of the drainage water is relatively turbid; and when the second load current value is in the Z interval, the turbidity of the drainage water is turbid.

[0013] Furthermore, when the turbidity of the inner tank water is clear and the turbidity of the drainage water is clear, the inner tank is determined to be free of stains; when the turbidity of the inner tank water is clear and the turbidity of the drainage water is somewhat turbid or turbid, the inner tank is determined to be lightly stained; when the turbidity of the inner tank water is somewhat turbid and the turbidity of the drainage water is clear, the inner tank is determined to be moderately stained; when the turbidity of the inner tank water is somewhat turbid and the turbidity of the drainage water is somewhat turbid or turbid, or when the turbidity of the inner tank water is turbid and the turbidity of the drainage water is clear, somewhat turbid, or turbid, the inner tank is determined to be heavily stained.

[0014] According to a second aspect of the embodiments of this application, an intelligent cleaning control method is provided, wherein the method determines the degree of soiling of the dishwasher inner tank by means of the soiling degree detection method of the inner tank as described in any of the above technical solutions; determines the amount of detergent to be added based on the degree of soiling of the inner tank; and adds detergent and performs cleaning.

[0015] Furthermore, before draining during the pre-washing stage, the initial level of soiling in the inner tank is determined, and the amount of detergent to be added is determined based on the initial level of soiling. During the heated cleaning stage, detergent is added according to the amount of detergent added, and a first cleaning is performed. When the amount of detergent added is greater than zero, before draining after the first cleaning, the initial level of soiling in the inner tank is determined, and the amount of detergent to be added is determined based on the initial level of soiling. Detergent is added according to the amount of detergent added, and a second cleaning is performed.

[0016] Furthermore, when the amount of detergent added for the nth time is greater than zero, before the nth cleaning and drainage, the degree of staining of the inner tank for the (n+1)th time is determined, and the amount of detergent added for the (n+1)th time is determined based on the degree of staining of the inner tank for the (n+1)th time; detergent is added according to the amount of detergent added for the (n+1)th time, and the (n+1)th cleaning is performed; when the amount of detergent added for the nth time is equal to zero, drainage is performed and the cleaning is completed.

[0017] Furthermore, after determining the amount of detergent to be added based on the degree of soiling of the inner tank, the method further includes: acquiring the current water temperature fed back by the thermistor at a fixed time difference Δt1; when the current water temperature is less than a preset temperature, continuing to acquire the current water temperature fed back by the thermistor at the fixed time difference Δt1; when the current water temperature is greater than or equal to the preset temperature and lasts for more than 1 minute, proceeding to the step of adding detergent and cleaning.

[0018] Furthermore, while determining the detergent dosage based on the degree of soiling of the inner tank, the method also includes: determining the cleaning water volume, cleaning temperature, and heating cleaning duration based on the degree of soiling of the inner tank.

[0019] Furthermore, the step of adding detergent includes: discharging detergent in a dose equal to the amount of detergent added from the detergent discharge structure; and adding the detergent into the inner drum of the dishwasher.

[0020] Furthermore, the step of discharging detergent in a dose equal to the detergent input amount from the detergent discharge structure includes: using a stepper motor to push a baffle disposed within the detergent discharge structure to discharge detergent in a dose equal to the detergent input amount.

[0021] Furthermore, the step of adding the detergent into the inner tub of the dishwasher includes: the detergent being discharged into the tower nozzle pipe; water being sprayed into the tower nozzle pipe from the water distribution motor located at the bottom of the dishwasher, and mixing with the detergent to form a mixture; the mixture being driven by the water distribution motor to move along the tower nozzle pipe to the middle nozzle and the upper nozzle, and being evenly sprayed to various parts of the dishwasher by the middle nozzle and the upper nozzle.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] The method of this application determines the water turbidity in the dishwasher tub by analyzing the load current value fed back from the pump, then determines the degree of soiling in the tub based on the water turbidity, and finally determines the amount of detergent to be used. This ensures that the amount of detergent used matches the actual washing needs, preventing waste or insufficient detergent. Because it eliminates the need for a turbidity sensor and only requires obtaining the load current value fed back from the dishwasher's own pump to determine the water turbidity, costs are significantly reduced. Furthermore, the detergent in this application does not rely on gravity to flow to the bottom of the dishwasher tub and then be sprayed onto various parts of the dishwasher; instead, it directly reaches the middle and upper nozzles through the tower-type nozzle pipe, resulting in higher detergent utilization efficiency and more even spraying. Attached Figure Description

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. In the drawings:

[0025] Figure 1 This is a flowchart illustrating an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the device structure according to an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the detergent discharge structure in an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the structure for adding detergent according to an embodiment of this application.

[0029] The attached figures are labeled as follows:

[0030] 1-Inlet pipe; 11-Inlet valve; 12-Inlet port; 2-Storage pipe; 21-Discharge valve; 3-Baffle; 4-Stepper motor; 5-Tower nozzle pipe; 51-Middle nozzle; 52-Upper nozzle; 6-Water distribution motor; 7-Inlet pipe. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] The terms "first," "second," etc. (if present) in the specification and claims of this invention are used to distinguish similar objects, not to describe a specific order or sequence. Even if "second" is used before a technical feature for distinction, it does not necessarily imply the presence of "first." It should be understood that in this invention, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be understood that in this invention, "a plurality of" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, and Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Containing X, Y, and Z," "Containing X, Y, and Z" means that all three X, Y, and Z are included; "Containing X, Y, or Z" means that one of X, Y, and Z is included; "Containing X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are included.

[0033] The technical solution of the present invention will be described in detail below with reference to specific embodiments. The following specific embodiments may be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0034] According to a first aspect of the present application, a method for detecting the degree of soiling in the inner tank of a dishwasher is provided. The method includes: obtaining a load current value fed back by a pump in the dishwasher; determining water turbidity based on the load current value; and judging the degree of soiling in the inner tank based on the water turbidity.

[0035] Specifically, the higher the water turbidity value, the greater the resistance encountered by the impeller of the pump body when rotating, and the greater the feedback load current value. Therefore, this application only needs to analyze the load current value fed back by the pump body using the control chip required by the dishwasher to obtain the water turbidity, thus reducing the use of a turbidity sensor.

[0036] Furthermore, in one embodiment, the step of obtaining the load current value fed back by the pump body in the dishwasher includes: obtaining the pump body feedback current value with a fixed time difference Δt as a period, and taking the average of all obtained pump body feedback current values ​​as the load current value. Specifically, in actual operation, the load current value can be obtained by obtaining the pump body feedback current value with a period of 10 seconds and calculating its average value.

[0037] Furthermore, in one embodiment, the pump body includes a washing pump; the turbidity of the inner tank water is determined based on a first load current value fed back by the washing pump.

[0038] Preferably, in one embodiment, the first load current value is divided into three intervals: when the first load current value is in interval A, the turbidity of the inner tank water is clear and the staining degree of the inner tank is no stain; when the first load current value is in interval B, the turbidity of the inner tank water is relatively cloudy and the staining degree of the inner tank is slightly stained; when the first load current value is in interval C, the turbidity of the inner tank water is cloudy and the staining degree of the inner tank is heavily stained.

[0039] Specifically, the range of the first load current value is divided into several different intervals to classify the water turbidity. It should be noted that the first load current value can be zoned according to actual needs, and the water turbidity can also be divided into grades according to actual needs, thereby corresponding to the corresponding level of tannery staining. Differences caused by simple zoning are all within the scope of protection of this application.

[0040] Furthermore, in one embodiment, the pump body further includes a drain pump; the turbidity of the drain water is determined based on a second load current value fed back by the drain pump.

[0041] Preferably, in one embodiment, the second load current value is divided into three intervals: when the second load current value is in interval X, the turbidity of the drainage water is clear; when the second load current value is in interval Y, the turbidity of the drainage water is relatively turbid; and when the second load current value is in interval Z, the turbidity of the drainage water is turbid. Similarly, the second load current value can be zoned according to actual needs, and the differences caused by simple different zoning are all within the protection scope of this application.

[0042] Furthermore, in one embodiment, when the turbidity of the inner tank water is clear and the turbidity of the drain water is clear, the inner tank is determined to be free of stains; when the turbidity of the inner tank water is clear and the turbidity of the drain water is somewhat turbid or turbid, the inner tank is determined to be lightly stained; when the turbidity of the inner tank water is somewhat turbid and the turbidity of the drain water is clear, the inner tank is determined to be moderately stained; when the turbidity of the inner tank water is somewhat turbid and the turbidity of the drain water is somewhat turbid or turbid, or when the turbidity of the inner tank water is turbid and the turbidity of the drain water is clear, somewhat turbid, or turbid, the inner tank is determined to be heavily stained.

[0043] Specifically, in this technical solution, the degree of soiling in the inner tank can be graded solely based on the turbidity of the inner tank water; alternatively, the turbidity of the inner tank water can be combined with the turbidity of the drain water to further refine the classification of the degree of soiling in the inner tank, making the subsequent intelligent cleaning control more accurate and efficient.

[0044] According to a second aspect of the embodiments of this application, an intelligent cleaning control method is provided, wherein the method determines the degree of soiling of the dishwasher inner tank by means of the soiling degree detection method of the inner tank as described in any of the above technical solutions; determines the amount of detergent to be added based on the degree of soiling of the inner tank; and adds detergent and performs cleaning.

[0045] Specifically, based on the degree of soiling of the inner tank (no soiling, light soiling, moderate soiling, and heavy soiling), the detergent dosage is also divided into zero, first, second, and third levels, with the dosage increasing progressively from zero. It should be noted that since the first and second load current values ​​can be zoned according to actual needs, the water turbidity and the degree of soiling of the inner tank can also be categorized into different levels, thereby setting corresponding detergent dosage levels. Differences in dosage levels caused by simple zoning are all within the scope of protection of this application.

[0046] Furthermore, in one embodiment, before draining during the pre-wash stage, the initial level of soiling in the inner tank is determined, and the amount of first detergent added is determined based on the initial level of soiling. During the heated cleaning stage: detergent is added according to the amount of the first detergent added, and a first cleaning is performed. When the amount of the first detergent added is greater than zero, before draining during the first cleaning, the initial level of soiling in the inner tank is determined, and the amount of second detergent added is determined based on the initial level of soiling. Detergent is added according to the amount of the second detergent added, and a second cleaning is performed.

[0047] Furthermore, in one embodiment, when the amount of detergent added is greater than zero, before the nth cleaning and drainage, the degree of staining of the inner tank in the (n+1)th time is determined, and the amount of detergent added in the (n+1)th time is determined according to the degree of staining of the inner tank in the (n+1)th time; detergent is added according to the amount of detergent added in the (n+1)th time, and the (n+1)th cleaning is performed; when the amount of detergent added in the nth time is equal to zero, drainage is performed and the cleaning ends.

[0048] Specifically, a dishwasher needs to perform a pre-wash and multiple heating washes to clean dishes. During the pre-wash stage, the dishwasher softens stains and rinses the dishes, thus allowing for an initial assessment of the soiling level inside the drum before draining. The control chip then determines the amount of detergent to be added based on this initial soiling level.

[0049] When the dishwasher enters the heating and washing stage, it adds detergent according to the first detergent dosage for the first wash. Before draining the water after the first wash, it measures the soiling level of the inner drum a second time. Similarly, the control chip determines the second detergent dosage based on this soiling level. After draining the water, the dishwasher adds detergent according to the second detergent dosage for the second wash. Before draining the water after the second wash, it measures the soiling level of the inner drum a third time. It is important to note that as long as the detergent dosage determined by the control chip is not zero, the soiling level of the inner drum must be measured before draining the water, until the control chip determines that no further detergent is needed. At this point, draining the water determines the wash is complete.

[0050] Furthermore, in one embodiment, after determining the amount of detergent to be added based on the degree of soiling of the inner tank, the method further includes: acquiring the current water temperature fed back by a thermistor at a fixed time difference Δt1; when the current water temperature is less than a preset temperature, continuing to acquire the current water temperature fed back by the thermistor at the fixed time difference Δt1; when the current water temperature is greater than or equal to the preset temperature and lasts for more than 1 minute, proceeding to the step of adding detergent and cleaning.

[0051] Specifically, for a dishwasher to clean dishes, in addition to requiring the right amount of detergent, it also needs the appropriate washing temperature. The above-mentioned technical solution solves the technical problem of adding detergent at the optimal temperature.

[0052] In summary, as Figure 1 As shown, the method steps of this application embodiment are as follows:

[0053] S1: Obtain the first load current value and the second load current value.

[0054] S2: The control chip determines the turbidity of the inner tank water based on the first load current value and the turbidity of the drain water based on the second load current value.

[0055] S3: Determine the degree of soiling in the inner tank based on the turbidity of the inner tank water and the turbidity of the drainage water.

[0056] S4: The control chip determines whether detergent needs to be added based on the degree of soiling of the inner tank. When detergent is not needed, drainage is performed and cleaning is completed. When detergent needs to be added, the amount of detergent to be added is determined based on the degree of soiling of the inner tank.

[0057] S5: Get the current water temperature.

[0058] S6: Compare the current water temperature with the preset temperature. If the current water temperature is less than the preset temperature, proceed to S5. If the current water temperature is greater than or equal to the preset temperature and remains so for more than 1 minute, proceed to S7.

[0059] S7: Add detergent for cleaning, and proceed to S1 after cleaning is completed and before drainage.

[0060] Furthermore, in one embodiment, while determining the detergent dosage based on the degree of soiling of the inner tank, the method further includes: determining the cleaning water volume, cleaning temperature, and heating cleaning duration based on the degree of soiling of the inner tank.

[0061] Specifically, during the dishwasher's cleaning process, the amount of water used, the cleaning temperature, and the heating and cleaning time all play a crucial role in efficiently cleaning the dishes. Therefore, based on the degree of soiling in the inner drum, this technical solution can determine the optimal amount of water, the optimal cleaning temperature, and the optimal heating and cleaning time to ensure that water and heating power are saved while cleaning the dishes, thereby achieving high efficiency and energy saving. Simultaneously, the optimal cleaning temperature determined at this point can be used as the preset temperature in step S6 to control the timing of detergent addition.

[0062] Furthermore, in one embodiment, the step of adding detergent includes: discharging detergent in a dose equal to the amount of detergent added from the detergent discharge structure; and adding the detergent into the inner drum of the dishwasher.

[0063] Furthermore, in one embodiment, the step of discharging detergent in a dose equal to the detergent input amount from the detergent discharge structure includes: using a stepper motor to push a baffle disposed within the detergent discharge structure to discharge detergent in a dose equal to the detergent input amount.

[0064] Specifically, such as Figure 3 As shown, the detergent discharge structure includes an input pipe 1, a storage pipe 2, an input valve 11, a discharge valve 21, and a baffle 3. The storage pipe 2 is placed horizontally and one end is connected to the wall of the tower nozzle pipe 5; the discharge valve 21 is fixedly installed inside the storage pipe 2 near the end of the tower nozzle pipe 5, and the opening or closing of the discharge valve 21 controls the connection or disconnection between the storage pipe 2 and the tower nozzle pipe 5; the baffle 3 is sealed inside the storage pipe 2 on the side away from the tower nozzle pipe 5, and a stepper motor 4 can drive the baffle 3 to move radially along the storage pipe 2; the input pipe 1 is located above the storage pipe 2 and one end is connected to the wall of the storage pipe 2; the input valve 11 is fixedly installed inside the input pipe 1 near the end of the storage pipe 2, and the opening or closing of the input valve 11 controls the connection or disconnection between the input pipe 1 and the storage pipe 2.

[0065] In summary, the specific method for discharging the corresponding dose of detergent from the detergent discharge structure is as follows:

[0066] S1: The input valve 11 is opened, the discharge valve 21 is closed, and the baffle 3 is located away from the discharge valve 21 in the initial position, so that the input pipe 1 is connected to the discharge valve 21 and the baffle 3.

[0067] S2: Add detergent from inlet 12 to fill the portion of the storage pipe 2 located between the discharge valve 21 and the baffle 3, and then close the inlet valve 11.

[0068] S3: Open the discharge valve 21, and the control chip controls the stepper motor 4 to push the baffle 3 toward the discharge valve 21 according to the determined detergent input amount, so as to push the corresponding amount of detergent into the through-tower nozzle pipe 5.

[0069] S4: Close the discharge valve 21, and the stepper motor 4 pulls the baffle 3 away from the discharge valve 21 to restore the initial position.

[0070] The detergent dosage is calculated as follows: baffle step size × storage pipe cross-sectional area.

[0071] Furthermore, in one embodiment, the step of adding the detergent into the inner tub of the dishwasher includes: the detergent being discharged into a tower nozzle pipe; water being sprayed from a water distribution motor located at the bottom of the dishwasher into the tower nozzle pipe and mixed with the detergent to form a mixture; the mixture being driven by the water distribution motor to move along the tower nozzle pipe to the middle nozzle and the upper nozzle, and being evenly sprayed by the middle nozzle and the upper nozzle to various parts of the dishwasher.

[0072] Specifically, such as Figure 4 As shown, the water-distributing motor 6 sprays water from the inlet pipe 7 into the tower-shaped nozzle pipe 5. The water mixes with the detergent squeezed into the tower-shaped nozzle pipe 5, and under the action of the water-distributing motor 6, it continues to flow upward in the tower-shaped nozzle pipe 5 to the middle nozzle 51 and the upper nozzle 52, and is then sprayed into the interior of the dishwasher from the middle nozzle 51 and the upper nozzle 52. This method allows the detergent to mix directly with the water after discharge and reach the middle nozzle 51 and the upper nozzle 52 directly through the tower-shaped nozzle pipe 5. This avoids the disadvantages of detergent being placed in the lower part of the dishwasher door panel, and detergent relying on gravity to concentrate and flow to the bottom front of the inner drum when added, which cannot be evenly sprayed on all dishes and thus affects the subsequent cleaning effect.

[0073] In summary, as Figure 2 As shown, the control chip acquires feedback data from the washing pump, the drain pump and the thermistor, determines and confirms the amount and time of detergent addition, and then controls the stepper standby 4 and the water distribution motor 6 to perform detergent discharge and detergent addition steps.

[0074] In addition to the preferred embodiments described above, there are other embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection claimed by the present invention.

Claims

1. A method for detecting the degree of soiling in the inner tub of a dishwasher, characterized in that, The method includes: Obtain the load current value fed back by the pump body in the dishwasher; The water turbidity is determined based on the load current value; The degree of soiling in the inner tank is determined based on the water turbidity.

2. The method for detecting the degree of soiling in the dishwasher inner tub according to claim 1, characterized in that, The step of obtaining the load current value fed back by the pump body in the dishwasher includes: The pump body feedback current value is acquired with a fixed time difference Δt as the period, and the average value of all the acquired pump body feedback current values ​​is taken as the load current value.

3. The method for detecting the degree of soiling in the dishwasher inner tub according to claim 1, characterized in that, The pump body includes a cleaning pump; The turbidity of the inner tank water is determined based on the first load current value fed back by the washing pump.

4. The method for detecting the degree of soiling in the dishwasher inner tub according to claim 3, characterized in that, The first load current value is divided into three intervals: When the first load current value is in zone A, the turbidity of the inner tank water is clear and the staininess of the inner tank is no stain. When the first load current value is in zone B, the turbidity of the inner tank water is relatively turbid, and the degree of staining of the inner tank is slightly stained. When the first load current value is in zone C, the turbidity of the inner tank water is cloudy, and the degree of staining of the inner tank is heavily stained.

5. The method for detecting the degree of soiling in the dishwasher inner tub according to claim 4, characterized in that, The pump body also includes a drainage pump; The turbidity of the drain water is determined based on the second load current value fed back by the drain pump.

6. The method for detecting the degree of soiling in the dishwasher inner tub according to claim 5, characterized in that, The second load current value is divided into three intervals: When the second load current value is in zone X, the turbidity of the drain water is clear; When the second load current value is in the Y zone, the turbidity of the drain water is relatively turbid; When the second load current value is in the Z zone, the turbidity of the drainage water is turbid.

7. The method for detecting the degree of soiling in the dishwasher inner tub according to claim 6, characterized in that, When the turbidity of the inner tank water is clear and the turbidity of the drainage water is clear, it is determined that the stain level of the inner tank is no stain. When the turbidity of the inner tank water is clear and the turbidity of the drainage water is relatively turbid or turbid, the degree of staining of the inner tank is judged to be light staining. When the turbidity of the inner tank water is relatively turbid and the turbidity of the drainage water is clear, the degree of staining of the inner tank is determined to be moderate. When the turbidity of the inner tank water is relatively turbid and the turbidity of the drainage water is relatively turbid or turbid, or when the turbidity of the inner tank water is turbid and the turbidity of the drainage water is clear or relatively turbid or turbid, the inner tank is judged to be heavily soiled.

8. A smart washing control method, characterized in that, The method determines the degree of staining of the dishwasher inner tank using the method for detecting the degree of staining of the inner tank as described in any one of claims 1 to 7. The amount of detergent to be added should be determined based on the degree of soiling of the inner tank. Add detergent and wash.

9. The intelligent washing control method according to claim 8, characterized in that, Before draining during the pre-washing stage, determine the initial level of soiling in the inner tank and determine the amount of detergent to be added based on the initial level of soiling in the inner tank. During the heating and washing stage: Add the detergent according to the first detergent dosage and perform the first wash; When the amount of the first detergent added is greater than zero, before the first cleaning and drainage, the second degree of staining of the inner tank is determined, and the amount of the second detergent added is determined based on the second degree of staining of the inner tank. Add the detergent according to the second detergent dosage, and perform a second wash.

10. The intelligent washing control method according to claim 9, characterized in that, When the amount of detergent added for the nth time is greater than zero, before the nth cleaning and drainage, the degree of staining of the inner tank in the (n+1)th time is determined, and the amount of detergent added for the (n+1)th time is determined based on the degree of staining of the inner tank in the (n+1)th time. Add detergent according to the (n+1)th detergent dosage, and perform the (n+1)th wash; When the amount of detergent added for the nth time is zero, drainage is performed and the cleaning process ends.

11. The intelligent washing control method according to claim 8, characterized in that, After determining the detergent dosage based on the degree of soiling of the inner liner, the method further includes: The current water temperature fed back by the thermistor is obtained with a fixed time difference Δt1 as the period; When the current water temperature is less than the preset temperature, the current water temperature fed back by the thermistor continues to be obtained with the fixed time difference Δt1 as the period. When the current water temperature is greater than or equal to the preset temperature and remains so for more than 1 minute, proceed to the step of adding detergent and cleaning.

12. The intelligent washing control method according to claim 8, characterized in that, While determining the detergent dosage based on the degree of soiling of the inner liner, the method further includes: The cleaning water volume, cleaning temperature, and heating cleaning time are determined based on the degree of soiling of the inner tank.

13. The intelligent washing control method according to claim 8, characterized in that, The step of adding the detergent includes: A dose of detergent equal to the amount of detergent added is discharged from the detergent discharge structure; Add the detergent into the dishwasher tub.

14. The intelligent washing control method according to claim 13, characterized in that, The step of discharging a dose of detergent equal to the amount of detergent added from the detergent discharge structure includes: A stepper motor is used to push a baffle set in the detergent discharge structure to discharge detergent in a dose equal to the amount of detergent added.

15. The intelligent washing control method according to claim 13, characterized in that, The step of adding the detergent into the dishwasher inner tub includes: The detergent is discharged into the tower-type nozzle pipeline; Water is sprayed from the water distribution motor located at the bottom of the dishwasher into the tower nozzle pipe and mixed with the detergent to form a mixture; Driven by the water distribution motor, the mixture moves along the tower-type nozzle pipe to the middle nozzle and the upper nozzle, and is then evenly sprayed by the middle nozzle and the upper nozzle to various parts of the dishwasher.

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