Water inlet control method of washing apparatus

Abstract

The present application relates to the field of washing equipment control, and specifically provides a water inlet control method of washing equipment, aiming at solving the problems of foam overflow, poor rinsing, detergent residue and the like caused by excessive detergent feeding. For this purpose, the water inlet control method of the washing equipment of the present application comprises: after the user performs manual detergent dispensing and water inlet is completed, detecting the detergent concentration in the washing water through the detergent concentration sensor; comparing the detected detergent concentration with a set concentration threshold; when the detected detergent concentration is greater than the set concentration threshold, diluting the detergent concentration to a specified range through water inlet and drainage. Through the water inlet control method of the washing equipment of the present application, the detergent concentration can be automatically adjusted, and the problems of foam overflow, poor rinsing, detergent residue and the like of the washing equipment caused by excessive detergent feeding can be avoided.

Description

Technical Field

[0001] This invention relates to the field of washing equipment control, and specifically provides a water inlet control method for washing equipment. Background Technology

[0002] Washing machines, dishwashers, and other laundry appliances require detergent to be added during the washing cycle to remove stains. Washing machines and dishwashers on the market offer two types of detergent dispensing: automatic and manual. Automatic dispensing dispenses a fixed amount of detergent, generally preventing over-dispensing. Manual dispensing, however, requires the user to control the amount of detergent. This can lead to over-dispensing, resulting in problems such as foam overflow, incomplete rinsing, and detergent residue. Summary of the Invention

[0003] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problems of foam overflow, incomplete rinsing, and detergent residue caused by excessive detergent due to manual addition.

[0004] To this end, the present invention provides a water inlet control method for a washing device, the washing device including a water inlet mechanism and a detergent concentration sensor, the method comprising the following steps:

[0005] S1, after the user manually dispenses the detergent and completes the water filling, the detergent concentration sensor detects the detergent concentration in the washing water;

[0006] S2, compare the detected detergent concentration with the set concentration threshold;

[0007] S3, when the detected detergent concentration is greater than the set concentration threshold, the detergent concentration is diluted to the specified range by inlet and outlet water.

[0008] Optionally, step S3 specifically includes:

[0009] The water inlet mechanism is controlled to replenish a set amount of water and then discharge the set amount of water, thereby diluting the detergent concentration to a specified range.

[0010] Optionally, the set amount is determined through the following steps:

[0011] Calculate the difference between the detected detergent concentration and the set concentration threshold;

[0012] The set amount is calculated based on the difference, such that after the set amount of water is added, the detergent concentration in the washing water is equal to or less than the set concentration threshold.

[0013] Optionally, the set amount is determined by the following equation:

[0014] V2 = V1(D / T-1)

[0015] Wherein, V2 is the set amount, V1 is the original water volume after the first water intake is completed, D is the detected detergent concentration, and T is the set concentration threshold.

[0016] Optionally, step S3 specifically includes:

[0017] The system controls the water inlet mechanism to discharge a set amount of water and then replenish the set amount of water to dilute the detergent concentration to a specified range.

[0018] Optionally, the set amount is determined through the following steps:

[0019] Calculate the difference between the detected detergent concentration and the set concentration threshold;

[0020] The set amount is calculated based on the difference, such that after the set amount of water is added, the detergent concentration in the washing water is equal to or less than the set concentration threshold.

[0021] Optionally, the set amount is determined by the following equation:

[0022] V2 = V1 * (1 - T / D)

[0023] Wherein, V2 is the set amount, V1 is the original water volume after the first water intake is completed, D is the detected detergent concentration, and T is the set concentration threshold.

[0024] Optionally, the method further includes the following steps:

[0025] After step S3, the detergent concentration in the washing water is re-detected and steps S2 and S3 are repeated until the detected detergent concentration is equal to or less than the set concentration threshold.

[0026] Optionally, the washing device is a pulsator washing machine, and the method further includes: in step S1, after the water intake is completed and before the concentration detection, the washing water is agitated by rotating the pulsator and / or the inner tub of the pulsator washing machine to make the detergent concentration therein more uniform; or

[0027] The washing equipment is a drum washing machine, and the method further includes: in step S1, after the water intake is completed and before the concentration detection, the washing water is agitated by rotating the inner drum of the drum washing machine to make the detergent concentration more uniform; or

[0028] The washing device is a dishwasher, and the method further includes: in step S1, after the water intake is completed and before the concentration is detected, the washing water is agitated by rotating the circulation pump of the dishwasher to make the detergent concentration therein more uniform.

[0029] Optionally, the washing device is a pulsator washing machine, and the method further includes: in step S3, between the water replenishment and drainage operations, agitating the washing water by rotating the pulsator and / or inner tub of the pulsator washing machine to make the detergent concentration therein more uniform; or

[0030] The washing equipment is a drum washing machine, and the method further includes: in step S3, between the water replenishment and drainage operations, rotating the inner drum of the drum washing machine to agitate the washing water to make the detergent concentration more uniform; or

[0031] The washing device is a dishwasher, and the method further includes: in step S3, between the water replenishment and drainage operations, the washing water is agitated by rotating the circulation pump of the dishwasher to make the detergent concentration therein more uniform.

[0032] Beneficial technical effects:

[0033] By adopting the above technical solution, the present invention avoids problems such as foam overflow, incomplete rinsing, and detergent residue caused by excessive detergent when manually adding detergent. Attached Figure Description

[0034] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0035] Figure 1 This is a flowchart of the main steps of the water inlet control method for the washing equipment of the present invention;

[0036] Figure 2 This is an application example of the water inlet control method of the washing equipment of the present invention in a dishwasher;

[0037] Figure 3 This is an application example of the water inlet control method of the washing equipment of the present invention in a washing machine.

[0038] List of reference numerals in the attached diagram:

[0039] 1-Dishwasher; 2-Dishwasher inner tub; 21-Sink; 3-Door; 4-Shelf; 5-Spray arm; 6-Detergent dispenser; 71-Flat filter; 72-Coarse filter; 73-Fine filter; 8-Inlet solenoid valve; 81-First water inlet; 9-Spray arm water supply; 10-Drain pump; 11-Washing circulation pump; 12-Controller; 13-Display device; 14-Detergent concentration sensor; 15-Drain pipe.

[0040] 1'-Washing machine; 2'-Outer drum; 3'-Inner drum; 4'-Door; 5'-Motor; 6'-Control panel; 7'-Water inlet solenoid valve; 71'-First water inlet pipe; 72'-Second water inlet pipe; 8'-Detergent container; 9'-Controller; 10'-Drain pump; 11'-Drain pipe; 12'-Detergent concentration detection sensor. Detailed Implementation

[0041] 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 present invention and are not intended to limit the scope of protection of the present invention.

[0042] In the description of this invention, the term "A and / or B" refers to all possible combinations of A and B, such as only A, only B, or A and B. The terms "at least one A or B" or "at least one of A and B" have a similar meaning to "A and / or B" and may include only A, only B, or A and B. The singular terms "a" or "this" may also include plural forms.

[0043] First refer to Figure 1 This invention provides a water inlet control method for a washing device, the washing device including a water inlet mechanism and a detergent concentration sensor, the method comprising the following steps:

[0044] S1, after the user manually dispenses the detergent and completes the water filling, the detergent concentration sensor detects the detergent concentration in the washing water;

[0045] Specifically, before the washing program starts, the user manually adds a certain amount of detergent to the corresponding washing container, then starts the washing program. The program controls the water inlet mechanism of the washing equipment to start adding water according to the preset water volume, simultaneously rinsing the detergent to form washing liquid. When the water volume reaches the preset level, the washing program controls the water inlet mechanism of the washing equipment to stop adding water, and detects the detergent concentration in the washing water through the detergent concentration sensor. The concentration sensor can be an ultrasonic sensor, optical sensor, or other similar detection device. The concentration sensor can be installed in the dishwasher's water tank or at the bottom of the washing machine's outer drum.

[0046] S2, compare the detected detergent concentration with the set concentration threshold;

[0047] Specifically, the detergent concentration sensor detects the detergent concentration in the wash water to obtain the current detergent concentration value in the washing container, and compares the detected detergent concentration with a set concentration threshold. The set concentration threshold is preferably a recommended detergent concentration value obtained from laboratory tests, and this threshold is pre-stored in the control panel of the washing equipment during production. Users can also modify and reset the detergent concentration threshold of the washing solution as needed via the control panel or corresponding control terminal. Furthermore, for both washing machines and dishwashers, this concentration threshold can be set to different values ​​for different washing programs, different fabric materials, or different types of tableware.

[0048] S3, when the detected detergent concentration is greater than the set concentration threshold, the detergent concentration is diluted to the specified range by inlet and outlet water.

[0049] Specifically, when the detected detergent concentration exceeds the set concentration threshold, it indicates that washing clothes or tableware with the current wash water will lead to problems such as detergent residue and excessive foam, requiring dilution of the wash water. One possible dilution method is for the washing equipment to control the water inlet mechanism to add a set amount of water and then discharge the set amount of water through the drain mechanism, thereby diluting the detergent concentration to the specified range.

[0050] Optionally, the set amount is determined through the following steps:

[0051] First, the washing equipment calculates the difference between the detected detergent concentration and the set concentration threshold;

[0052] Then, the set amount is calculated based on the difference, such that after the set amount of water is added, the detergent concentration in the washing water is equal to or less than the set concentration threshold.

[0053] Optionally, the set amount is determined by the following equation:

[0054] V2 = V1(D / T-1)

[0055] Wherein, V2 is the set amount, V1 is the original water volume after the first water intake is completed, D is the detected detergent concentration, and T is the set concentration threshold.

[0056] Those skilled in the art will understand that when the required water volume for inflow and outflow is calculated according to the above equation, the diluted detergent concentration is exactly equal to the set concentration threshold. In practice, after calculating the value of V2, the actual water volume for inflow and outflow can be set to be greater than V2, thereby making the diluted detergent concentration less than the set concentration threshold.

[0057] It should be further explained that before the water inlet mechanism adds water, it first determines whether the remaining water capacity of the washing container in the current washing equipment is greater than the calculated amount of water to be added. If the comparison result is that the remaining water capacity of the washing container is less than the calculated amount of water to be added, then this method cannot add enough water to dilute the concentration of the current washing liquid. In this case, the washing equipment will automatically select a dilution scheme of draining water first and then adding water.

[0058] Alternatively, when the detected detergent concentration is greater than the set concentration threshold, a second dilution method can be adopted: the washing equipment controls the drainage mechanism to first discharge a set amount of water and then replenishes the set amount of water through the water inlet mechanism, thereby diluting the detergent concentration to the specified range.

[0059] Optionally, the set amount is determined through the following steps:

[0060] First, the washing equipment calculates the difference between the detected detergent concentration and the set concentration threshold;

[0061] Then, the set amount is calculated based on the difference, such that after the set amount of water is added, the detergent concentration in the washing water is equal to or less than the set concentration threshold.

[0062] Optionally, the set amount is determined by the following equation:

[0063] V2 = V1 * (1 - T / D)

[0064] Wherein, V2 is the set amount, V1 is the original water volume after the first water intake is completed, D is the detected detergent concentration, and T is the set concentration threshold.

[0065] Similarly, when the required water volume for inflow and outflow is calculated according to the above equation, the diluted detergent concentration will be exactly equal to the set concentration threshold. In practice, after calculating the value of V2, the actual water volume for inflow and outflow can be set to be greater than V2, thereby making the diluted detergent concentration less than the set concentration threshold.

[0066] It should be further explained that when using the method of draining first and then replenishing water, the detergent concentration in the wash water is higher during drainage, resulting in a higher detergent content being discharged with the same amount of wash water. Therefore, compared to the method of replenishing water first and then draining, the amount of water discharged using the "drain first, then replenish water" method is relatively less. As for whether to choose the "replenish water first, then drain" or "drain first, then replenish water" dilution scheme, or to choose different execution orders of the two dilution schemes, the user can modify the settings according to the specific circumstances.

[0067] In addition, when the detected detergent concentration is greater than the set concentration threshold, a third dilution method can be adopted, which is to control the water inlet mechanism to run for a set time and then drain water for a set time to dilute the detergent concentration to the specified range.

[0068] Specifically, when the detected detergent concentration exceeds the set concentration threshold, the washing equipment automatically initiates a short-term water intake. The specific duration of this short-term water intake is determined through laboratory testing, and different recommended values ​​for the short-term water intake duration are set for different equipment. This water intake duration is pre-stored in the washing equipment's control panel during production. For example, the water intake duration may be set to 1 minute. The washing equipment opens the water intake mechanism to replenish water within the set water intake duration, and then drains water through the drainage mechanism for the set duration to reduce the detergent concentration.

[0069] Regarding this dilution method, it should be noted that since the degree of dilution and the volume of water entering and leaving the system are not precisely calculated, the concentration of the diluted detergent usually needs to be retested after water is entered and drained to determine whether it still exceeds the standard. If it still exceeds the standard, the operation of entering water first and then draining water needs to be performed again, and this cycle is repeated until the detergent concentration is lower than the set threshold.

[0070] In addition, when the detected detergent concentration is greater than the set concentration threshold, a fourth dilution method can be adopted, in which the washing equipment controls the drainage mechanism to drain water for a set time and then add water for a set time in order to dilute the detergent concentration to the specified range.

[0071] Specifically, when the detected detergent concentration exceeds the set concentration threshold, the washing equipment automatically initiates a short-term drainage. The specific drainage time is determined based on laboratory testing, and different recommended drainage durations are set for different equipment. This drainage duration is pre-stored in the washing equipment's control panel during production. For example, the drainage duration may be set to 1 minute. Within the set drainage duration, the washing equipment opens the drainage mechanism to discharge some of the washing water, and then refills the water inlet for the set duration to reduce the detergent concentration.

[0072] Similarly, since the dilution level and the amount of water entering and leaving the system are not precisely calculated, the concentration of the diluted detergent usually needs to be retested after draining and then filling the system to determine if it still exceeds the standard. If it still exceeds the standard, the operation of draining and then filling the system needs to be performed again, and this cycle is repeated until the detergent concentration is lower than the set threshold.

[0073] In addition, when the detected detergent concentration is greater than the set concentration threshold, a fifth dilution method can be adopted, in which the washing equipment controls the water inlet mechanism to first enter a certain height of water and then discharge a certain height of water in order to dilute the detergent concentration to the specified range.

[0074] Specifically, multiple water levels are pre-set in the washing container of the washing equipment, each representing a fixed solution volume. When the detected detergent concentration exceeds the set concentration threshold, the water level is first raised to an appropriate level via the water inlet mechanism, and then drained back to the pre-replenishment water level via the drainage mechanism to reduce the detergent concentration.

[0075] Similarly, this method involves water intake and drainage based on height, without precisely calculating the degree of dilution or the volume of water being intake and drainage. After water intake and drainage, it is usually necessary to retest the concentration of the diluted detergent to determine if it still exceeds the standard. If it still exceeds the standard, the process of water intake and drainage needs to be repeated, and this cycle continues until the detergent concentration is below the set threshold.

[0076] In addition, when the detected detergent concentration is greater than the set concentration threshold, a sixth dilution method can be adopted, in which the washing equipment controls the drainage mechanism to drain water to a predetermined height and then replenishes water to the height before drainage in order to dilute the detergent concentration to the specified range.

[0077] Specifically, multiple water levels are pre-set in the washing container of the washing equipment, each representing a fixed solution volume. When the detected detergent concentration exceeds the set concentration threshold, the water level is first lowered to the predetermined height via a drainage mechanism, and then replenished to the pre-set water level via a water inlet mechanism to reduce the detergent concentration.

[0078] Similarly, this method also involves water intake and drainage based on height, without accurately calculating the degree of dilution and the amount of water to be intake and drainage. After draining and then adding water, it is usually necessary to retest the concentration of the diluted detergent to determine if it still exceeds the standard. If it still exceeds the standard, the operation of draining and then adding water needs to be performed again, and this cycle is repeated until the detergent concentration is lower than the set threshold.

[0079] Optionally, for the dilution methods described above that do not involve precise calculation of influent and effluent volumes, the method further includes the following steps:

[0080] After step S3, that is, after the washing equipment dilutes the detergent concentration in the washing container, the washing equipment re-detects the detergent concentration in the washing water and repeats steps S2 and S3 until the detected detergent concentration is equal to or less than the set concentration threshold.

[0081] Specifically, when the detergent concentration in the washing container is detected to be higher than the set concentration threshold, the washing program repeatedly dilutes the washing solution in the washing container until the detergent concentration is equal to or less than the set concentration threshold. Then, the washing program controls the washing equipment to continue the normal washing steps.

[0082] Optionally, the washing device is a pulsator washing machine, and the method further includes: in step S1, after the water intake is completed and before the concentration detection, the washing water is agitated by rotating the pulsator and / or the inner tub of the pulsator washing machine to make the detergent concentration therein more uniform; or

[0083] The washing equipment is a drum washing machine, and the method further includes: in step S1, after the water intake is completed and before the concentration detection, the washing water is agitated by rotating the inner drum of the drum washing machine to make the detergent concentration more uniform; or

[0084] The washing device is a dishwasher, and the method further includes: in step S1, after the water intake is completed and before the concentration is detected, the washing water is agitated by rotating the circulation pump of the dishwasher to make the detergent concentration therein more uniform.

[0085] Optionally, the washing device is a pulsator washing machine, and the method further includes: in step S3, between the water replenishment and drainage operations, agitating the washing water by rotating the pulsator and / or inner tub of the pulsator washing machine to make the detergent concentration therein more uniform; or

[0086] The washing equipment is a drum washing machine, and the method further includes: in step S3, between the water replenishment and drainage operations, rotating the inner drum of the drum washing machine to agitate the washing water to make the detergent concentration more uniform; or

[0087] The washing device is a dishwasher, and the method further includes: in step S3, between the water replenishment and drainage operations, the washing water is agitated by rotating the circulation pump of the dishwasher to make the detergent concentration therein more uniform.

[0088] The following is combined with Figure 2 This section describes an application example of the water inlet control method of the washing apparatus of the present invention in a dishwasher. From... Figure 2 As can be seen in the attached diagram, the correspondence between the dishwasher's components and the corresponding labels is as follows: 1-Dishwasher; 2-Dishwasher inner tub; 21-Water tank; 3-Door; 4-Shelf; 5-Spray arm; 6-Detergent dispenser; 71-Flat filter; 72-Coarse filter; 73-Fine filter; 8-Inlet valve / pump; 81-First water inlet path; 9-Spray arm water supply path; 10-Drain valve / pump; 11-Washing circulation pump; 12-Controller; 13-Display device; 14-Detergent concentration detection sensor; 15-Drain pipe.

[0089] The water inlet control method of the washing equipment of the present invention is specifically executed by the controller 12 in the dishwasher according to the following process:

[0090] First, after the user manually dispenses the detergent and the dishwasher has finished filling with water, the detergent concentration detection sensor 14 detects the detergent concentration in the washing water.

[0091] Then, the detected detergent concentration is compared with the set concentration threshold;

[0092] Next, when the detected detergent concentration is greater than the set concentration threshold, water inlet and drain operations are performed in different sequences through the water inlet valve / pump 8 and the drain valve / pump 10 in order to dilute the detergent concentration to the specified range.

[0093] In addition, before each detergent concentration test, the washing water in the inner tank 2 is repeatedly circulated for a period of time by the washing circulation pump 11 to ensure that the detergent is more evenly distributed in the water, thereby making the concentration test value more accurate.

[0094] The following is combined with Figure 3 This section describes an application example of the water inlet control method of the washing apparatus of the present invention in a washing machine. From... Figure 3 As can be seen in the attached diagram, the correspondence between the relevant components of the washing machine and the corresponding labels is as follows: 1'-Washing machine; 2'-Outer drum; 3'-Inner drum; 4'-Door; 5'-Motor; 6'-Control panel; 7'-Water inlet valve / pump; 71'-First water inlet pipe; 72'-Second water inlet pipe; 8'-Detergent container; 9'-Controller; 10'-Drain valve / pump; 11'-Drain pipe; 12'-Detergent concentration detection sensor.

[0095] The water inlet control method of the washing equipment of the present invention is specifically executed by the controller 9' in the washing machine according to the following process:

[0096] First, after the user manually dispenses the detergent and completes the water filling, the detergent concentration in the washing water is detected by the detergent concentration detection sensor 12'.

[0097] Then, the detected detergent concentration is compared with the set concentration threshold;

[0098] Next, when the detected detergent concentration is greater than the set concentration threshold, water inlet and drain operations are performed in different sequences through the water inlet valve / pump 7' and the drain valve / pump 10' in order to dilute the detergent concentration to the specified range.

[0099] Similarly, especially before each detergent concentration test, the washing water in the outer drum 2' is repeatedly agitated for a period of time by rotating the inner drum 3', so as to ensure that the detergent is distributed more evenly in the water, thereby making the concentration test value more accurate.

[0100] 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 water intake control method of a washing apparatus including a water intake mechanism and a detergent concentration sensor, characterized in that, The method comprises the following steps: S1, after the user performs manual detergent dispensing and water filling, detecting the detergent concentration in the washing water through the detergent concentration sensor; S2, comparing the detected detergent concentration with a set concentration threshold; S3, when the detected detergent concentration is greater than the set concentration threshold, diluting the detergent concentration to a specified range through water filling and draining; wherein, step S3 specifically comprises: controlling the water filling mechanism to supplement a set amount of water and then draining the set amount of water to dilute the detergent concentration to the specified range; the set amount is determined by the following steps: calculating the difference between the detected detergent concentration and the set concentration threshold; calculating the set amount according to the difference, so that after supplementing the set amount of water, the detergent concentration in the washing water is equal to or less than the set concentration threshold; the set amount is determined by the following equation: V2=V1(D / T-1) wherein, V2 is the set amount, V1 is the original water amount after the first water filling is completed, D is the detected detergent concentration, and T is the set concentration threshold.

2. The water inlet control method of a washing apparatus according to claim 1, characterized by, The method further comprises the following steps: after step S3, re-detecting the detergent concentration in the washing water and re-executing steps S2 and S3 until the detected detergent concentration is equal to or less than the set concentration threshold.

3. The water filling control method of the washing apparatus according to claim 1, wherein the washing apparatus is a pulsator washing machine, and the method further comprises: in step S1, after the water filling is completed, before the concentration detection, agitating the washing water by rotating a pulsator and / or an inner tub of the pulsator washing machine to make the detergent concentration therein more uniform; or the washing apparatus is a drum washing machine, and the method further comprises: in step S1, after the water filling is completed, before the concentration detection, agitating the washing water by rotating an inner tub of the drum washing machine to make the detergent concentration therein more uniform; or the washing apparatus is a dishwasher, and the method further comprises: in step S1, after the water filling is completed, before the concentration detection, agitating the washing water by rotating a circulating pump of the dishwasher to make the detergent concentration therein more uniform.

4. The water filling control method of the washing apparatus according to claim 1, wherein the washing apparatus is a pulsator washing machine, and the method further comprises: in step S3, between the water supplementing and draining operations, agitating the washing water by rotating a pulsator and / or an inner tub of the pulsator washing machine to make the detergent concentration therein more uniform; or the washing apparatus is a drum washing machine, and the method further comprises: in step S3, between the water supplementing and draining operations, agitating the washing water by rotating an inner tub of the drum washing machine to make the detergent concentration therein more uniform; or the washing apparatus is a dishwasher, and the method further comprises: in step S3, between the water supplementing and draining operations, agitating the washing water by rotating a circulating pump of the dishwasher to make the detergent concentration therein more uniform.

5. A water inlet control method of a washing apparatus including a water inlet mechanism and a detergent concentration sensor, characterized in that, the method comprises the following steps: S1, after the user performs manual detergent dispensing and water filling, detecting the detergent concentration in the washing water by the detergent concentration sensor; S2, comparing the detected detergent concentration with a set concentration threshold; S3, when the detected detergent concentration is greater than the set concentration threshold, diluting the detergent concentration to a specified range by water filling and draining; wherein step S3 specifically comprises: controlling the water filling mechanism to discharge a set amount of water and then supplement the set amount of water to dilute the detergent concentration to the specified range; wherein the set amount is determined by the following steps: calculating the difference between the detected detergent concentration and the set concentration threshold; calculating the set amount according to the difference, so that after supplementing the set amount of water, the detergent concentration in the washing water is equal to or less than the set concentration threshold; the set amount is determined by the following equation: V2=V1* (1-T / D) wherein V2 is the set amount, V1 is the original water amount after the first water filling is completed, D is the detected detergent concentration, and T is the set concentration threshold.

6. The water inlet control method of a washing apparatus according to claim 5, characterized by, The method further comprises the following steps: after step S3, re-detecting the detergent concentration in the washing water and re-executing steps S2 and S3 until the detected detergent concentration is equal to or less than the set concentration threshold.

7. The water filling control method of the washing apparatus according to claim 5, wherein the washing apparatus is a pulsator washing machine, and the method further comprises: in step S1, after the water filling is completed and before the concentration detection, agitating the washing water by rotating a pulsator and / or an inner tub of the pulsator washing machine to make the detergent concentration therein more uniform; or the washing apparatus is a drum washing machine, and the method further comprises: in step S1, after the water filling is completed and before the concentration detection, agitating the washing water by rotating an inner tub of the drum washing machine to make the detergent concentration therein more uniform; or the washing apparatus is a dishwasher, and the method further comprises: in step S1, after the water filling is completed and before the concentration detection, agitating the washing water by rotating a circulating pump of the dishwasher to make the detergent concentration therein more uniform.

8. The water filling control method of the washing apparatus according to claim 5, wherein the washing apparatus is a pulsator washing machine, and the method further comprises: in step S3, between the water supplementing and the draining operation, agitating the washing water by rotating a pulsator and / or an inner tub of the pulsator washing machine to make the detergent concentration therein more uniform; or the washing apparatus is a drum washing machine, and the method further comprises: in step S3, between the water supplementing and the draining operation, agitating the washing water by rotating an inner tub of the drum washing machine to make the detergent concentration therein more uniform; or the washing apparatus is a dishwasher, and the method further comprises: in step S3, between the water supplementing and the draining operation, agitating the washing water by rotating a circulating pump of the dishwasher to make the detergent concentration therein more uniform.

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